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| author | Eliseo Martínez <eliseomarmol@gmail.com> | 2014-05-12 02:25:17 +0200 |
|---|---|---|
| committer | Eliseo Martínez <eliseomarmol@gmail.com> | 2014-05-15 20:46:01 +0200 |
| commit | da51dc9cf202772f60bd2da975dbef257bd9237c (patch) | |
| tree | 5c16b93238a153f55634e9323077f30c8133970c /src/regexp.c | |
| parent | ffe61e5ba1721340ca51d56bae3ddaca415fb5bc (diff) | |
| download | rneovim-da51dc9cf202772f60bd2da975dbef257bd9237c.tar.gz rneovim-da51dc9cf202772f60bd2da975dbef257bd9237c.tar.bz2 rneovim-da51dc9cf202772f60bd2da975dbef257bd9237c.zip | |
Introduce nvim namespace: Move files.
Move files from src/ to src/nvim/.
- src/nvim/ becomes the new root dir for nvim executable sources.
- src/libnvim/ is planned to become root dir of the neovim library.
Diffstat (limited to 'src/regexp.c')
| -rw-r--r-- | src/regexp.c | 7117 |
1 files changed, 0 insertions, 7117 deletions
diff --git a/src/regexp.c b/src/regexp.c deleted file mode 100644 index 35d8e30129..0000000000 --- a/src/regexp.c +++ /dev/null @@ -1,7117 +0,0 @@ -/* - * Handling of regular expressions: vim_regcomp(), vim_regexec(), vim_regsub() - * - * NOTICE: - * - * This is NOT the original regular expression code as written by Henry - * Spencer. This code has been modified specifically for use with the VIM - * editor, and should not be used separately from Vim. If you want a good - * regular expression library, get the original code. The copyright notice - * that follows is from the original. - * - * END NOTICE - * - * Copyright (c) 1986 by University of Toronto. - * Written by Henry Spencer. Not derived from licensed software. - * - * Permission is granted to anyone to use this software for any - * purpose on any computer system, and to redistribute it freely, - * subject to the following restrictions: - * - * 1. The author is not responsible for the consequences of use of - * this software, no matter how awful, even if they arise - * from defects in it. - * - * 2. The origin of this software must not be misrepresented, either - * by explicit claim or by omission. - * - * 3. Altered versions must be plainly marked as such, and must not - * be misrepresented as being the original software. - * - * Beware that some of this code is subtly aware of the way operator - * precedence is structured in regular expressions. Serious changes in - * regular-expression syntax might require a total rethink. - * - * Changes have been made by Tony Andrews, Olaf 'Rhialto' Seibert, Robert - * Webb, Ciaran McCreesh and Bram Moolenaar. - * Named character class support added by Walter Briscoe (1998 Jul 01) - */ - -/* Uncomment the first if you do not want to see debugging logs or files - * related to regular expressions, even when compiling with -DDEBUG. - * Uncomment the second to get the regexp debugging. */ -/* #undef REGEXP_DEBUG */ -/* #define REGEXP_DEBUG */ - -#include <string.h> - -#include "vim.h" -#include "regexp.h" -#include "charset.h" -#include "eval.h" -#include "ex_cmds2.h" -#include "mark.h" -#include "memline.h" -#include "memory.h" -#include "message.h" -#include "misc1.h" -#include "misc2.h" -#include "garray.h" - -#ifdef REGEXP_DEBUG -/* show/save debugging data when BT engine is used */ -# define BT_REGEXP_DUMP -/* save the debugging data to a file instead of displaying it */ -# define BT_REGEXP_LOG -# define BT_REGEXP_DEBUG_LOG -# define BT_REGEXP_DEBUG_LOG_NAME "bt_regexp_debug.log" -#endif - -/* - * The "internal use only" fields in regexp_defs.h are present to pass info from - * compile to execute that permits the execute phase to run lots faster on - * simple cases. They are: - * - * regstart char that must begin a match; NUL if none obvious; Can be a - * multi-byte character. - * reganch is the match anchored (at beginning-of-line only)? - * regmust string (pointer into program) that match must include, or NULL - * regmlen length of regmust string - * regflags RF_ values or'ed together - * - * Regstart and reganch permit very fast decisions on suitable starting points - * for a match, cutting down the work a lot. Regmust permits fast rejection - * of lines that cannot possibly match. The regmust tests are costly enough - * that vim_regcomp() supplies a regmust only if the r.e. contains something - * potentially expensive (at present, the only such thing detected is * or + - * at the start of the r.e., which can involve a lot of backup). Regmlen is - * supplied because the test in vim_regexec() needs it and vim_regcomp() is - * computing it anyway. - */ - -/* - * Structure for regexp "program". This is essentially a linear encoding - * of a nondeterministic finite-state machine (aka syntax charts or - * "railroad normal form" in parsing technology). Each node is an opcode - * plus a "next" pointer, possibly plus an operand. "Next" pointers of - * all nodes except BRANCH and BRACES_COMPLEX implement concatenation; a "next" - * pointer with a BRANCH on both ends of it is connecting two alternatives. - * (Here we have one of the subtle syntax dependencies: an individual BRANCH - * (as opposed to a collection of them) is never concatenated with anything - * because of operator precedence). The "next" pointer of a BRACES_COMPLEX - * node points to the node after the stuff to be repeated. - * The operand of some types of node is a literal string; for others, it is a - * node leading into a sub-FSM. In particular, the operand of a BRANCH node - * is the first node of the branch. - * (NB this is *not* a tree structure: the tail of the branch connects to the - * thing following the set of BRANCHes.) - * - * pattern is coded like: - * - * +-----------------+ - * | V - * <aa>\|<bb> BRANCH <aa> BRANCH <bb> --> END - * | ^ | ^ - * +------+ +----------+ - * - * - * +------------------+ - * V | - * <aa>* BRANCH BRANCH <aa> --> BACK BRANCH --> NOTHING --> END - * | | ^ ^ - * | +---------------+ | - * +---------------------------------------------+ - * - * - * +----------------------+ - * V | - * <aa>\+ BRANCH <aa> --> BRANCH --> BACK BRANCH --> NOTHING --> END - * | | ^ ^ - * | +-----------+ | - * +--------------------------------------------------+ - * - * - * +-------------------------+ - * V | - * <aa>\{} BRANCH BRACE_LIMITS --> BRACE_COMPLEX <aa> --> BACK END - * | | ^ - * | +----------------+ - * +-----------------------------------------------+ - * - * - * <aa>\@!<bb> BRANCH NOMATCH <aa> --> END <bb> --> END - * | | ^ ^ - * | +----------------+ | - * +--------------------------------+ - * - * +---------+ - * | V - * \z[abc] BRANCH BRANCH a BRANCH b BRANCH c BRANCH NOTHING --> END - * | | | | ^ ^ - * | | | +-----+ | - * | | +----------------+ | - * | +---------------------------+ | - * +------------------------------------------------------+ - * - * They all start with a BRANCH for "\|" alternatives, even when there is only - * one alternative. - */ - -/* - * The opcodes are: - */ - -/* definition number opnd? meaning */ -#define END 0 /* End of program or NOMATCH operand. */ -#define BOL 1 /* Match "" at beginning of line. */ -#define EOL 2 /* Match "" at end of line. */ -#define BRANCH 3 /* node Match this alternative, or the - * next... */ -#define BACK 4 /* Match "", "next" ptr points backward. */ -#define EXACTLY 5 /* str Match this string. */ -#define NOTHING 6 /* Match empty string. */ -#define STAR 7 /* node Match this (simple) thing 0 or more - * times. */ -#define PLUS 8 /* node Match this (simple) thing 1 or more - * times. */ -#define MATCH 9 /* node match the operand zero-width */ -#define NOMATCH 10 /* node check for no match with operand */ -#define BEHIND 11 /* node look behind for a match with operand */ -#define NOBEHIND 12 /* node look behind for no match with operand */ -#define SUBPAT 13 /* node match the operand here */ -#define BRACE_SIMPLE 14 /* node Match this (simple) thing between m and - * n times (\{m,n\}). */ -#define BOW 15 /* Match "" after [^a-zA-Z0-9_] */ -#define EOW 16 /* Match "" at [^a-zA-Z0-9_] */ -#define BRACE_LIMITS 17 /* nr nr define the min & max for BRACE_SIMPLE - * and BRACE_COMPLEX. */ -#define NEWL 18 /* Match line-break */ -#define BHPOS 19 /* End position for BEHIND or NOBEHIND */ - - -/* character classes: 20-48 normal, 50-78 include a line-break */ -#define ADD_NL 30 -#define FIRST_NL ANY + ADD_NL -#define ANY 20 /* Match any one character. */ -#define ANYOF 21 /* str Match any character in this string. */ -#define ANYBUT 22 /* str Match any character not in this - * string. */ -#define IDENT 23 /* Match identifier char */ -#define SIDENT 24 /* Match identifier char but no digit */ -#define KWORD 25 /* Match keyword char */ -#define SKWORD 26 /* Match word char but no digit */ -#define FNAME 27 /* Match file name char */ -#define SFNAME 28 /* Match file name char but no digit */ -#define PRINT 29 /* Match printable char */ -#define SPRINT 30 /* Match printable char but no digit */ -#define WHITE 31 /* Match whitespace char */ -#define NWHITE 32 /* Match non-whitespace char */ -#define DIGIT 33 /* Match digit char */ -#define NDIGIT 34 /* Match non-digit char */ -#define HEX 35 /* Match hex char */ -#define NHEX 36 /* Match non-hex char */ -#define OCTAL 37 /* Match octal char */ -#define NOCTAL 38 /* Match non-octal char */ -#define WORD 39 /* Match word char */ -#define NWORD 40 /* Match non-word char */ -#define HEAD 41 /* Match head char */ -#define NHEAD 42 /* Match non-head char */ -#define ALPHA 43 /* Match alpha char */ -#define NALPHA 44 /* Match non-alpha char */ -#define LOWER 45 /* Match lowercase char */ -#define NLOWER 46 /* Match non-lowercase char */ -#define UPPER 47 /* Match uppercase char */ -#define NUPPER 48 /* Match non-uppercase char */ -#define LAST_NL NUPPER + ADD_NL -#define WITH_NL(op) ((op) >= FIRST_NL && (op) <= LAST_NL) - -#define MOPEN 80 /* -89 Mark this point in input as start of - * \( subexpr. MOPEN + 0 marks start of - * match. */ -#define MCLOSE 90 /* -99 Analogous to MOPEN. MCLOSE + 0 marks - * end of match. */ -#define BACKREF 100 /* -109 node Match same string again \1-\9 */ - -# define ZOPEN 110 /* -119 Mark this point in input as start of - * \z( subexpr. */ -# define ZCLOSE 120 /* -129 Analogous to ZOPEN. */ -# define ZREF 130 /* -139 node Match external submatch \z1-\z9 */ - -#define BRACE_COMPLEX 140 /* -149 node Match nodes between m & n times */ - -#define NOPEN 150 /* Mark this point in input as start of - \%( subexpr. */ -#define NCLOSE 151 /* Analogous to NOPEN. */ - -#define MULTIBYTECODE 200 /* mbc Match one multi-byte character */ -#define RE_BOF 201 /* Match "" at beginning of file. */ -#define RE_EOF 202 /* Match "" at end of file. */ -#define CURSOR 203 /* Match location of cursor. */ - -#define RE_LNUM 204 /* nr cmp Match line number */ -#define RE_COL 205 /* nr cmp Match column number */ -#define RE_VCOL 206 /* nr cmp Match virtual column number */ - -#define RE_MARK 207 /* mark cmp Match mark position */ -#define RE_VISUAL 208 /* Match Visual area */ - -/* - * Magic characters have a special meaning, they don't match literally. - * Magic characters are negative. This separates them from literal characters - * (possibly multi-byte). Only ASCII characters can be Magic. - */ -#define Magic(x) ((int)(x) - 256) -#define un_Magic(x) ((x) + 256) -#define is_Magic(x) ((x) < 0) - -static int no_Magic(int x); -static int toggle_Magic(int x); - -static int no_Magic(int x) -{ - if (is_Magic(x)) - return un_Magic(x); - return x; -} - -static int toggle_Magic(int x) -{ - if (is_Magic(x)) - return un_Magic(x); - return Magic(x); -} - -/* - * The first byte of the regexp internal "program" is actually this magic - * number; the start node begins in the second byte. It's used to catch the - * most severe mutilation of the program by the caller. - */ - -#define REGMAGIC 0234 - -/* - * Opcode notes: - * - * BRANCH The set of branches constituting a single choice are hooked - * together with their "next" pointers, since precedence prevents - * anything being concatenated to any individual branch. The - * "next" pointer of the last BRANCH in a choice points to the - * thing following the whole choice. This is also where the - * final "next" pointer of each individual branch points; each - * branch starts with the operand node of a BRANCH node. - * - * BACK Normal "next" pointers all implicitly point forward; BACK - * exists to make loop structures possible. - * - * STAR,PLUS '=', and complex '*' and '+', are implemented as circular - * BRANCH structures using BACK. Simple cases (one character - * per match) are implemented with STAR and PLUS for speed - * and to minimize recursive plunges. - * - * BRACE_LIMITS This is always followed by a BRACE_SIMPLE or BRACE_COMPLEX - * node, and defines the min and max limits to be used for that - * node. - * - * MOPEN,MCLOSE ...are numbered at compile time. - * ZOPEN,ZCLOSE ...ditto - */ - -/* - * A node is one char of opcode followed by two chars of "next" pointer. - * "Next" pointers are stored as two 8-bit bytes, high order first. The - * value is a positive offset from the opcode of the node containing it. - * An operand, if any, simply follows the node. (Note that much of the - * code generation knows about this implicit relationship.) - * - * Using two bytes for the "next" pointer is vast overkill for most things, - * but allows patterns to get big without disasters. - */ -#define OP(p) ((int)*(p)) -#define NEXT(p) (((*((p) + 1) & 0377) << 8) + (*((p) + 2) & 0377)) -#define OPERAND(p) ((p) + 3) -/* Obtain an operand that was stored as four bytes, MSB first. */ -#define OPERAND_MIN(p) (((long)(p)[3] << 24) + ((long)(p)[4] << 16) \ - + ((long)(p)[5] << 8) + (long)(p)[6]) -/* Obtain a second operand stored as four bytes. */ -#define OPERAND_MAX(p) OPERAND_MIN((p) + 4) -/* Obtain a second single-byte operand stored after a four bytes operand. */ -#define OPERAND_CMP(p) (p)[7] - -/* - * Utility definitions. - */ -#define UCHARAT(p) ((int)*(char_u *)(p)) - -/* Used for an error (down from) vim_regcomp(): give the error message, set - * rc_did_emsg and return NULL */ -#define EMSG_RET_NULL(m) return (EMSG(m), rc_did_emsg = TRUE, (void *)NULL) -#define EMSG_RET_FAIL(m) return (EMSG(m), rc_did_emsg = TRUE, FAIL) -#define EMSG2_RET_NULL(m, \ - c) return (EMSG2((m), \ - (c) ? "" : "\\"), rc_did_emsg = TRUE, \ - (void *)NULL) -#define EMSG2_RET_FAIL(m, \ - c) return (EMSG2((m), \ - (c) ? "" : "\\"), rc_did_emsg = TRUE, \ - FAIL) -#define EMSG_ONE_RET_NULL EMSG2_RET_NULL(_( \ - "E369: invalid item in %s%%[]"), reg_magic == MAGIC_ALL) - -#define MAX_LIMIT (32767L << 16L) - -static int re_multi_type(int); -static int cstrncmp(char_u *s1, char_u *s2, int *n); -static char_u *cstrchr(char_u *, int); - -#ifdef BT_REGEXP_DUMP -static void regdump(char_u *, bt_regprog_T *); -#endif -#ifdef REGEXP_DEBUG -static char_u *regprop(char_u *); -#endif - -static char_u e_missingbracket[] = N_("E769: Missing ] after %s["); -static char_u e_unmatchedpp[] = N_("E53: Unmatched %s%%("); -static char_u e_unmatchedp[] = N_("E54: Unmatched %s("); -static char_u e_unmatchedpar[] = N_("E55: Unmatched %s)"); -static char_u e_z_not_allowed[] = N_("E66: \\z( not allowed here"); -static char_u e_z1_not_allowed[] = N_("E67: \\z1 et al. not allowed here"); -static char_u e_missing_sb[] = N_("E69: Missing ] after %s%%["); -static char_u e_empty_sb[] = N_("E70: Empty %s%%[]"); -#define NOT_MULTI 0 -#define MULTI_ONE 1 -#define MULTI_MULT 2 -/* - * Return NOT_MULTI if c is not a "multi" operator. - * Return MULTI_ONE if c is a single "multi" operator. - * Return MULTI_MULT if c is a multi "multi" operator. - */ -static int re_multi_type(int c) -{ - if (c == Magic('@') || c == Magic('=') || c == Magic('?')) - return MULTI_ONE; - if (c == Magic('*') || c == Magic('+') || c == Magic('{')) - return MULTI_MULT; - return NOT_MULTI; -} - -/* - * Flags to be passed up and down. - */ -#define HASWIDTH 0x1 /* Known never to match null string. */ -#define SIMPLE 0x2 /* Simple enough to be STAR/PLUS operand. */ -#define SPSTART 0x4 /* Starts with * or +. */ -#define HASNL 0x8 /* Contains some \n. */ -#define HASLOOKBH 0x10 /* Contains "\@<=" or "\@<!". */ -#define WORST 0 /* Worst case. */ - -/* - * When regcode is set to this value, code is not emitted and size is computed - * instead. - */ -#define JUST_CALC_SIZE ((char_u *) -1) - -static char_u *reg_prev_sub = NULL; - -/* - * REGEXP_INRANGE contains all characters which are always special in a [] - * range after '\'. - * REGEXP_ABBR contains all characters which act as abbreviations after '\'. - * These are: - * \n - New line (NL). - * \r - Carriage Return (CR). - * \t - Tab (TAB). - * \e - Escape (ESC). - * \b - Backspace (Ctrl_H). - * \d - Character code in decimal, eg \d123 - * \o - Character code in octal, eg \o80 - * \x - Character code in hex, eg \x4a - * \u - Multibyte character code, eg \u20ac - * \U - Long multibyte character code, eg \U12345678 - */ -static char_u REGEXP_INRANGE[] = "]^-n\\"; -static char_u REGEXP_ABBR[] = "nrtebdoxuU"; - -static int backslash_trans(int c); -static int get_char_class(char_u **pp); -static int get_equi_class(char_u **pp); -static void reg_equi_class(int c); -static int get_coll_element(char_u **pp); -static char_u *skip_anyof(char_u *p); -static void init_class_tab(void); - -/* - * Translate '\x' to its control character, except "\n", which is Magic. - */ -static int backslash_trans(int c) -{ - switch (c) { - case 'r': return CAR; - case 't': return TAB; - case 'e': return ESC; - case 'b': return BS; - } - return c; -} - -/* - * Check for a character class name "[:name:]". "pp" points to the '['. - * Returns one of the CLASS_ items. CLASS_NONE means that no item was - * recognized. Otherwise "pp" is advanced to after the item. - */ -static int get_char_class(char_u **pp) -{ - static const char *(class_names[]) = - { - "alnum:]", -#define CLASS_ALNUM 0 - "alpha:]", -#define CLASS_ALPHA 1 - "blank:]", -#define CLASS_BLANK 2 - "cntrl:]", -#define CLASS_CNTRL 3 - "digit:]", -#define CLASS_DIGIT 4 - "graph:]", -#define CLASS_GRAPH 5 - "lower:]", -#define CLASS_LOWER 6 - "print:]", -#define CLASS_PRINT 7 - "punct:]", -#define CLASS_PUNCT 8 - "space:]", -#define CLASS_SPACE 9 - "upper:]", -#define CLASS_UPPER 10 - "xdigit:]", -#define CLASS_XDIGIT 11 - "tab:]", -#define CLASS_TAB 12 - "return:]", -#define CLASS_RETURN 13 - "backspace:]", -#define CLASS_BACKSPACE 14 - "escape:]", -#define CLASS_ESCAPE 15 - }; -#define CLASS_NONE 99 - int i; - - if ((*pp)[1] == ':') { - for (i = 0; i < (int)(sizeof(class_names) / sizeof(*class_names)); ++i) - if (STRNCMP(*pp + 2, class_names[i], STRLEN(class_names[i])) == 0) { - *pp += STRLEN(class_names[i]) + 2; - return i; - } - } - return CLASS_NONE; -} - -/* - * Specific version of character class functions. - * Using a table to keep this fast. - */ -static short class_tab[256]; - -#define RI_DIGIT 0x01 -#define RI_HEX 0x02 -#define RI_OCTAL 0x04 -#define RI_WORD 0x08 -#define RI_HEAD 0x10 -#define RI_ALPHA 0x20 -#define RI_LOWER 0x40 -#define RI_UPPER 0x80 -#define RI_WHITE 0x100 - -static void init_class_tab(void) -{ - int i; - static int done = FALSE; - - if (done) - return; - - for (i = 0; i < 256; ++i) { - if (i >= '0' && i <= '7') - class_tab[i] = RI_DIGIT + RI_HEX + RI_OCTAL + RI_WORD; - else if (i >= '8' && i <= '9') - class_tab[i] = RI_DIGIT + RI_HEX + RI_WORD; - else if (i >= 'a' && i <= 'f') - class_tab[i] = RI_HEX + RI_WORD + RI_HEAD + RI_ALPHA + RI_LOWER; - else if (i >= 'g' && i <= 'z') - class_tab[i] = RI_WORD + RI_HEAD + RI_ALPHA + RI_LOWER; - else if (i >= 'A' && i <= 'F') - class_tab[i] = RI_HEX + RI_WORD + RI_HEAD + RI_ALPHA + RI_UPPER; - else if (i >= 'G' && i <= 'Z') - class_tab[i] = RI_WORD + RI_HEAD + RI_ALPHA + RI_UPPER; - else if (i == '_') - class_tab[i] = RI_WORD + RI_HEAD; - else - class_tab[i] = 0; - } - class_tab[' '] |= RI_WHITE; - class_tab['\t'] |= RI_WHITE; - done = TRUE; -} - -# define ri_digit(c) (c < 0x100 && (class_tab[c] & RI_DIGIT)) -# define ri_hex(c) (c < 0x100 && (class_tab[c] & RI_HEX)) -# define ri_octal(c) (c < 0x100 && (class_tab[c] & RI_OCTAL)) -# define ri_word(c) (c < 0x100 && (class_tab[c] & RI_WORD)) -# define ri_head(c) (c < 0x100 && (class_tab[c] & RI_HEAD)) -# define ri_alpha(c) (c < 0x100 && (class_tab[c] & RI_ALPHA)) -# define ri_lower(c) (c < 0x100 && (class_tab[c] & RI_LOWER)) -# define ri_upper(c) (c < 0x100 && (class_tab[c] & RI_UPPER)) -# define ri_white(c) (c < 0x100 && (class_tab[c] & RI_WHITE)) - -/* flags for regflags */ -#define RF_ICASE 1 /* ignore case */ -#define RF_NOICASE 2 /* don't ignore case */ -#define RF_HASNL 4 /* can match a NL */ -#define RF_ICOMBINE 8 /* ignore combining characters */ -#define RF_LOOKBH 16 /* uses "\@<=" or "\@<!" */ - -/* - * Global work variables for vim_regcomp(). - */ - -static char_u *regparse; /* Input-scan pointer. */ -static int prevchr_len; /* byte length of previous char */ -static int num_complex_braces; /* Complex \{...} count */ -static int regnpar; /* () count. */ -static int regnzpar; /* \z() count. */ -static int re_has_z; /* \z item detected */ -static char_u *regcode; /* Code-emit pointer, or JUST_CALC_SIZE */ -static long regsize; /* Code size. */ -static int reg_toolong; /* TRUE when offset out of range */ -static char_u had_endbrace[NSUBEXP]; /* flags, TRUE if end of () found */ -static unsigned regflags; /* RF_ flags for prog */ -static long brace_min[10]; /* Minimums for complex brace repeats */ -static long brace_max[10]; /* Maximums for complex brace repeats */ -static int brace_count[10]; /* Current counts for complex brace repeats */ -static int had_eol; /* TRUE when EOL found by vim_regcomp() */ -static int one_exactly = FALSE; /* only do one char for EXACTLY */ - -static int reg_magic; /* magicness of the pattern: */ -#define MAGIC_NONE 1 /* "\V" very unmagic */ -#define MAGIC_OFF 2 /* "\M" or 'magic' off */ -#define MAGIC_ON 3 /* "\m" or 'magic' */ -#define MAGIC_ALL 4 /* "\v" very magic */ - -static int reg_string; /* matching with a string instead of a buffer - line */ -static int reg_strict; /* "[abc" is illegal */ - -/* - * META contains all characters that may be magic, except '^' and '$'. - */ - -/* META[] is used often enough to justify turning it into a table. */ -static char_u META_flags[] = { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - /* % & ( ) * + . */ - 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, - /* 1 2 3 4 5 6 7 8 9 < = > ? */ - 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, - /* @ A C D F H I K L M O */ - 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, - /* P S U V W X Z [ _ */ - 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, - /* a c d f h i k l m n o */ - 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, - /* p s u v w x z { | ~ */ - 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1 -}; - -static int curchr; /* currently parsed character */ -/* Previous character. Note: prevchr is sometimes -1 when we are not at the - * start, eg in /[ ^I]^ the pattern was never found even if it existed, - * because ^ was taken to be magic -- webb */ -static int prevchr; -static int prevprevchr; /* previous-previous character */ -static int nextchr; /* used for ungetchr() */ - -/* arguments for reg() */ -#define REG_NOPAREN 0 /* toplevel reg() */ -#define REG_PAREN 1 /* \(\) */ -#define REG_ZPAREN 2 /* \z(\) */ -#define REG_NPAREN 3 /* \%(\) */ - -typedef struct { - char_u *regparse; - int prevchr_len; - int curchr; - int prevchr; - int prevprevchr; - int nextchr; - int at_start; - int prev_at_start; - int regnpar; -} parse_state_T; - -/* - * Forward declarations for vim_regcomp()'s friends. - */ -static void initchr(char_u *); -static void save_parse_state(parse_state_T *ps); -static void restore_parse_state(parse_state_T *ps); -static int getchr(void); -static void skipchr_keepstart(void); -static int peekchr(void); -static void skipchr(void); -static void ungetchr(void); -static int gethexchrs(int maxinputlen); -static int getoctchrs(void); -static int getdecchrs(void); -static int coll_get_char(void); -static void regcomp_start(char_u *expr, int flags); -static char_u *reg(int, int *); -static char_u *regbranch(int *flagp); -static char_u *regconcat(int *flagp); -static char_u *regpiece(int *); -static char_u *regatom(int *); -static char_u *regnode(int); -static int use_multibytecode(int c); -static int prog_magic_wrong(void); -static char_u *regnext(char_u *); -static void regc(int b); -static void regmbc(int c); -# define REGMBC(x) regmbc(x); -# define CASEMBC(x) case x: -static void reginsert(int, char_u *); -static void reginsert_nr(int op, long val, char_u *opnd); -static void reginsert_limits(int, long, long, char_u *); -static char_u *re_put_long(char_u *pr, long_u val); -static int read_limits(long *, long *); -static void regtail(char_u *, char_u *); -static void regoptail(char_u *, char_u *); - -static regengine_T bt_regengine; -static regengine_T nfa_regengine; - -/* - * Return TRUE if compiled regular expression "prog" can match a line break. - */ -int re_multiline(regprog_T *prog) -{ - return prog->regflags & RF_HASNL; -} - -/* - * Check for an equivalence class name "[=a=]". "pp" points to the '['. - * Returns a character representing the class. Zero means that no item was - * recognized. Otherwise "pp" is advanced to after the item. - */ -static int get_equi_class(char_u **pp) -{ - int c; - int l = 1; - char_u *p = *pp; - - if (p[1] == '=') { - if (has_mbyte) - l = (*mb_ptr2len)(p + 2); - if (p[l + 2] == '=' && p[l + 3] == ']') { - if (has_mbyte) - c = mb_ptr2char(p + 2); - else - c = p[2]; - *pp += l + 4; - return c; - } - } - return 0; -} - - -/* - * Produce the bytes for equivalence class "c". - * Currently only handles latin1, latin9 and utf-8. - * NOTE: When changing this function, also change nfa_emit_equi_class() - */ -static void reg_equi_class(int c) -{ - if (enc_utf8 || STRCMP(p_enc, "latin1") == 0 - || STRCMP(p_enc, "iso-8859-15") == 0) { - switch (c) { - case 'A': case '\300': case '\301': case '\302': - CASEMBC(0x100) CASEMBC(0x102) CASEMBC(0x104) CASEMBC(0x1cd) - CASEMBC(0x1de) CASEMBC(0x1e0) CASEMBC(0x1ea2) - case '\303': case '\304': case '\305': - regmbc('A'); regmbc('\300'); regmbc('\301'); - regmbc('\302'); regmbc('\303'); regmbc('\304'); - regmbc('\305'); - REGMBC(0x100) REGMBC(0x102) REGMBC(0x104) - REGMBC(0x1cd) REGMBC(0x1de) REGMBC(0x1e0) - REGMBC(0x1ea2) - return; - case 'B': CASEMBC(0x1e02) CASEMBC(0x1e06) - regmbc('B'); REGMBC(0x1e02) REGMBC(0x1e06) - return; - case 'C': case '\307': - CASEMBC(0x106) CASEMBC(0x108) CASEMBC(0x10a) CASEMBC(0x10c) - regmbc('C'); regmbc('\307'); - REGMBC(0x106) REGMBC(0x108) REGMBC(0x10a) - REGMBC(0x10c) - return; - case 'D': CASEMBC(0x10e) CASEMBC(0x110) CASEMBC(0x1e0a) - CASEMBC(0x1e0e) CASEMBC(0x1e10) - regmbc('D'); REGMBC(0x10e) REGMBC(0x110) - REGMBC(0x1e0a) REGMBC(0x1e0e) REGMBC(0x1e10) - return; - case 'E': case '\310': case '\311': case '\312': case '\313': - CASEMBC(0x112) CASEMBC(0x114) CASEMBC(0x116) CASEMBC(0x118) - CASEMBC(0x11a) CASEMBC(0x1eba) CASEMBC(0x1ebc) - regmbc('E'); regmbc('\310'); regmbc('\311'); - regmbc('\312'); regmbc('\313'); - REGMBC(0x112) REGMBC(0x114) REGMBC(0x116) - REGMBC(0x118) REGMBC(0x11a) REGMBC(0x1eba) - REGMBC(0x1ebc) - return; - case 'F': CASEMBC(0x1e1e) - regmbc('F'); REGMBC(0x1e1e) - return; - case 'G': CASEMBC(0x11c) CASEMBC(0x11e) CASEMBC(0x120) - CASEMBC(0x122) CASEMBC(0x1e4) CASEMBC(0x1e6) CASEMBC(0x1f4) - CASEMBC(0x1e20) - regmbc('G'); REGMBC(0x11c) REGMBC(0x11e) - REGMBC(0x120) REGMBC(0x122) REGMBC(0x1e4) - REGMBC(0x1e6) REGMBC(0x1f4) REGMBC(0x1e20) - return; - case 'H': CASEMBC(0x124) CASEMBC(0x126) CASEMBC(0x1e22) - CASEMBC(0x1e26) CASEMBC(0x1e28) - regmbc('H'); REGMBC(0x124) REGMBC(0x126) - REGMBC(0x1e22) REGMBC(0x1e26) REGMBC(0x1e28) - return; - case 'I': case '\314': case '\315': case '\316': case '\317': - CASEMBC(0x128) CASEMBC(0x12a) CASEMBC(0x12c) CASEMBC(0x12e) - CASEMBC(0x130) CASEMBC(0x1cf) CASEMBC(0x1ec8) - regmbc('I'); regmbc('\314'); regmbc('\315'); - regmbc('\316'); regmbc('\317'); - REGMBC(0x128) REGMBC(0x12a) REGMBC(0x12c) - REGMBC(0x12e) REGMBC(0x130) REGMBC(0x1cf) - REGMBC(0x1ec8) - return; - case 'J': CASEMBC(0x134) - regmbc('J'); REGMBC(0x134) - return; - case 'K': CASEMBC(0x136) CASEMBC(0x1e8) CASEMBC(0x1e30) - CASEMBC(0x1e34) - regmbc('K'); REGMBC(0x136) REGMBC(0x1e8) - REGMBC(0x1e30) REGMBC(0x1e34) - return; - case 'L': CASEMBC(0x139) CASEMBC(0x13b) CASEMBC(0x13d) - CASEMBC(0x13f) CASEMBC(0x141) CASEMBC(0x1e3a) - regmbc('L'); REGMBC(0x139) REGMBC(0x13b) - REGMBC(0x13d) REGMBC(0x13f) REGMBC(0x141) - REGMBC(0x1e3a) - return; - case 'M': CASEMBC(0x1e3e) CASEMBC(0x1e40) - regmbc('M'); REGMBC(0x1e3e) REGMBC(0x1e40) - return; - case 'N': case '\321': - CASEMBC(0x143) CASEMBC(0x145) CASEMBC(0x147) CASEMBC(0x1e44) - CASEMBC(0x1e48) - regmbc('N'); regmbc('\321'); - REGMBC(0x143) REGMBC(0x145) REGMBC(0x147) - REGMBC(0x1e44) REGMBC(0x1e48) - return; - case 'O': case '\322': case '\323': case '\324': case '\325': - case '\326': case '\330': - CASEMBC(0x14c) CASEMBC(0x14e) CASEMBC(0x150) CASEMBC(0x1a0) - CASEMBC(0x1d1) CASEMBC(0x1ea) CASEMBC(0x1ec) CASEMBC(0x1ece) - regmbc('O'); regmbc('\322'); regmbc('\323'); - regmbc('\324'); regmbc('\325'); regmbc('\326'); - regmbc('\330'); - REGMBC(0x14c) REGMBC(0x14e) REGMBC(0x150) - REGMBC(0x1a0) REGMBC(0x1d1) REGMBC(0x1ea) - REGMBC(0x1ec) REGMBC(0x1ece) - return; - case 'P': case 0x1e54: case 0x1e56: - regmbc('P'); REGMBC(0x1e54) REGMBC(0x1e56) - return; - case 'R': CASEMBC(0x154) CASEMBC(0x156) CASEMBC(0x158) - CASEMBC(0x1e58) CASEMBC(0x1e5e) - regmbc('R'); REGMBC(0x154) REGMBC(0x156) REGMBC(0x158) - REGMBC(0x1e58) REGMBC(0x1e5e) - return; - case 'S': CASEMBC(0x15a) CASEMBC(0x15c) CASEMBC(0x15e) - CASEMBC(0x160) CASEMBC(0x1e60) - regmbc('S'); REGMBC(0x15a) REGMBC(0x15c) - REGMBC(0x15e) REGMBC(0x160) REGMBC(0x1e60) - return; - case 'T': CASEMBC(0x162) CASEMBC(0x164) CASEMBC(0x166) - CASEMBC(0x1e6a) CASEMBC(0x1e6e) - regmbc('T'); REGMBC(0x162) REGMBC(0x164) - REGMBC(0x166) REGMBC(0x1e6a) REGMBC(0x1e6e) - return; - case 'U': case '\331': case '\332': case '\333': case '\334': - CASEMBC(0x168) CASEMBC(0x16a) CASEMBC(0x16c) CASEMBC(0x16e) - CASEMBC(0x170) CASEMBC(0x172) CASEMBC(0x1af) CASEMBC(0x1d3) - CASEMBC(0x1ee6) - regmbc('U'); regmbc('\331'); regmbc('\332'); - regmbc('\333'); regmbc('\334'); - REGMBC(0x168) REGMBC(0x16a) REGMBC(0x16c) - REGMBC(0x16e) REGMBC(0x170) REGMBC(0x172) - REGMBC(0x1af) REGMBC(0x1d3) REGMBC(0x1ee6) - return; - case 'V': CASEMBC(0x1e7c) - regmbc('V'); REGMBC(0x1e7c) - return; - case 'W': CASEMBC(0x174) CASEMBC(0x1e80) CASEMBC(0x1e82) - CASEMBC(0x1e84) CASEMBC(0x1e86) - regmbc('W'); REGMBC(0x174) REGMBC(0x1e80) - REGMBC(0x1e82) REGMBC(0x1e84) REGMBC(0x1e86) - return; - case 'X': CASEMBC(0x1e8a) CASEMBC(0x1e8c) - regmbc('X'); REGMBC(0x1e8a) REGMBC(0x1e8c) - return; - case 'Y': case '\335': - CASEMBC(0x176) CASEMBC(0x178) CASEMBC(0x1e8e) CASEMBC(0x1ef2) - CASEMBC(0x1ef6) CASEMBC(0x1ef8) - regmbc('Y'); regmbc('\335'); - REGMBC(0x176) REGMBC(0x178) REGMBC(0x1e8e) - REGMBC(0x1ef2) REGMBC(0x1ef6) REGMBC(0x1ef8) - return; - case 'Z': CASEMBC(0x179) CASEMBC(0x17b) CASEMBC(0x17d) - CASEMBC(0x1b5) CASEMBC(0x1e90) CASEMBC(0x1e94) - regmbc('Z'); REGMBC(0x179) REGMBC(0x17b) - REGMBC(0x17d) REGMBC(0x1b5) REGMBC(0x1e90) - REGMBC(0x1e94) - return; - case 'a': case '\340': case '\341': case '\342': - case '\343': case '\344': case '\345': - CASEMBC(0x101) CASEMBC(0x103) CASEMBC(0x105) CASEMBC(0x1ce) - CASEMBC(0x1df) CASEMBC(0x1e1) CASEMBC(0x1ea3) - regmbc('a'); regmbc('\340'); regmbc('\341'); - regmbc('\342'); regmbc('\343'); regmbc('\344'); - regmbc('\345'); - REGMBC(0x101) REGMBC(0x103) REGMBC(0x105) - REGMBC(0x1ce) REGMBC(0x1df) REGMBC(0x1e1) - REGMBC(0x1ea3) - return; - case 'b': CASEMBC(0x1e03) CASEMBC(0x1e07) - regmbc('b'); REGMBC(0x1e03) REGMBC(0x1e07) - return; - case 'c': case '\347': - CASEMBC(0x107) CASEMBC(0x109) CASEMBC(0x10b) CASEMBC(0x10d) - regmbc('c'); regmbc('\347'); - REGMBC(0x107) REGMBC(0x109) REGMBC(0x10b) - REGMBC(0x10d) - return; - case 'd': CASEMBC(0x10f) CASEMBC(0x111) CASEMBC(0x1d0b) - CASEMBC(0x1e11) - regmbc('d'); REGMBC(0x10f) REGMBC(0x111) - REGMBC(0x1e0b) REGMBC(0x01e0f) REGMBC(0x1e11) - return; - case 'e': case '\350': case '\351': case '\352': case '\353': - CASEMBC(0x113) CASEMBC(0x115) CASEMBC(0x117) CASEMBC(0x119) - CASEMBC(0x11b) CASEMBC(0x1ebb) CASEMBC(0x1ebd) - regmbc('e'); regmbc('\350'); regmbc('\351'); - regmbc('\352'); regmbc('\353'); - REGMBC(0x113) REGMBC(0x115) REGMBC(0x117) - REGMBC(0x119) REGMBC(0x11b) REGMBC(0x1ebb) - REGMBC(0x1ebd) - return; - case 'f': CASEMBC(0x1e1f) - regmbc('f'); REGMBC(0x1e1f) - return; - case 'g': CASEMBC(0x11d) CASEMBC(0x11f) CASEMBC(0x121) - CASEMBC(0x123) CASEMBC(0x1e5) CASEMBC(0x1e7) CASEMBC(0x1f5) - CASEMBC(0x1e21) - regmbc('g'); REGMBC(0x11d) REGMBC(0x11f) - REGMBC(0x121) REGMBC(0x123) REGMBC(0x1e5) - REGMBC(0x1e7) REGMBC(0x1f5) REGMBC(0x1e21) - return; - case 'h': CASEMBC(0x125) CASEMBC(0x127) CASEMBC(0x1e23) - CASEMBC(0x1e27) CASEMBC(0x1e29) CASEMBC(0x1e96) - regmbc('h'); REGMBC(0x125) REGMBC(0x127) - REGMBC(0x1e23) REGMBC(0x1e27) REGMBC(0x1e29) - REGMBC(0x1e96) - return; - case 'i': case '\354': case '\355': case '\356': case '\357': - CASEMBC(0x129) CASEMBC(0x12b) CASEMBC(0x12d) CASEMBC(0x12f) - CASEMBC(0x1d0) CASEMBC(0x1ec9) - regmbc('i'); regmbc('\354'); regmbc('\355'); - regmbc('\356'); regmbc('\357'); - REGMBC(0x129) REGMBC(0x12b) REGMBC(0x12d) - REGMBC(0x12f) REGMBC(0x1d0) REGMBC(0x1ec9) - return; - case 'j': CASEMBC(0x135) CASEMBC(0x1f0) - regmbc('j'); REGMBC(0x135) REGMBC(0x1f0) - return; - case 'k': CASEMBC(0x137) CASEMBC(0x1e9) CASEMBC(0x1e31) - CASEMBC(0x1e35) - regmbc('k'); REGMBC(0x137) REGMBC(0x1e9) - REGMBC(0x1e31) REGMBC(0x1e35) - return; - case 'l': CASEMBC(0x13a) CASEMBC(0x13c) CASEMBC(0x13e) - CASEMBC(0x140) CASEMBC(0x142) CASEMBC(0x1e3b) - regmbc('l'); REGMBC(0x13a) REGMBC(0x13c) - REGMBC(0x13e) REGMBC(0x140) REGMBC(0x142) - REGMBC(0x1e3b) - return; - case 'm': CASEMBC(0x1e3f) CASEMBC(0x1e41) - regmbc('m'); REGMBC(0x1e3f) REGMBC(0x1e41) - return; - case 'n': case '\361': - CASEMBC(0x144) CASEMBC(0x146) CASEMBC(0x148) CASEMBC(0x149) - CASEMBC(0x1e45) CASEMBC(0x1e49) - regmbc('n'); regmbc('\361'); - REGMBC(0x144) REGMBC(0x146) REGMBC(0x148) - REGMBC(0x149) REGMBC(0x1e45) REGMBC(0x1e49) - return; - case 'o': case '\362': case '\363': case '\364': case '\365': - case '\366': case '\370': - CASEMBC(0x14d) CASEMBC(0x14f) CASEMBC(0x151) CASEMBC(0x1a1) - CASEMBC(0x1d2) CASEMBC(0x1eb) CASEMBC(0x1ed) CASEMBC(0x1ecf) - regmbc('o'); regmbc('\362'); regmbc('\363'); - regmbc('\364'); regmbc('\365'); regmbc('\366'); - regmbc('\370'); - REGMBC(0x14d) REGMBC(0x14f) REGMBC(0x151) - REGMBC(0x1a1) REGMBC(0x1d2) REGMBC(0x1eb) - REGMBC(0x1ed) REGMBC(0x1ecf) - return; - case 'p': CASEMBC(0x1e55) CASEMBC(0x1e57) - regmbc('p'); REGMBC(0x1e55) REGMBC(0x1e57) - return; - case 'r': CASEMBC(0x155) CASEMBC(0x157) CASEMBC(0x159) - CASEMBC(0x1e59) CASEMBC(0x1e5f) - regmbc('r'); REGMBC(0x155) REGMBC(0x157) REGMBC(0x159) - REGMBC(0x1e59) REGMBC(0x1e5f) - return; - case 's': CASEMBC(0x15b) CASEMBC(0x15d) CASEMBC(0x15f) - CASEMBC(0x161) CASEMBC(0x1e61) - regmbc('s'); REGMBC(0x15b) REGMBC(0x15d) - REGMBC(0x15f) REGMBC(0x161) REGMBC(0x1e61) - return; - case 't': CASEMBC(0x163) CASEMBC(0x165) CASEMBC(0x167) - CASEMBC(0x1e6b) CASEMBC(0x1e6f) CASEMBC(0x1e97) - regmbc('t'); REGMBC(0x163) REGMBC(0x165) REGMBC(0x167) - REGMBC(0x1e6b) REGMBC(0x1e6f) REGMBC(0x1e97) - return; - case 'u': case '\371': case '\372': case '\373': case '\374': - CASEMBC(0x169) CASEMBC(0x16b) CASEMBC(0x16d) CASEMBC(0x16f) - CASEMBC(0x171) CASEMBC(0x173) CASEMBC(0x1b0) CASEMBC(0x1d4) - CASEMBC(0x1ee7) - regmbc('u'); regmbc('\371'); regmbc('\372'); - regmbc('\373'); regmbc('\374'); - REGMBC(0x169) REGMBC(0x16b) REGMBC(0x16d) - REGMBC(0x16f) REGMBC(0x171) REGMBC(0x173) - REGMBC(0x1b0) REGMBC(0x1d4) REGMBC(0x1ee7) - return; - case 'v': CASEMBC(0x1e7d) - regmbc('v'); REGMBC(0x1e7d) - return; - case 'w': CASEMBC(0x175) CASEMBC(0x1e81) CASEMBC(0x1e83) - CASEMBC(0x1e85) CASEMBC(0x1e87) CASEMBC(0x1e98) - regmbc('w'); REGMBC(0x175) REGMBC(0x1e81) - REGMBC(0x1e83) REGMBC(0x1e85) REGMBC(0x1e87) - REGMBC(0x1e98) - return; - case 'x': CASEMBC(0x1e8b) CASEMBC(0x1e8d) - regmbc('x'); REGMBC(0x1e8b) REGMBC(0x1e8d) - return; - case 'y': case '\375': case '\377': - CASEMBC(0x177) CASEMBC(0x1e8f) CASEMBC(0x1e99) - CASEMBC(0x1ef3) CASEMBC(0x1ef7) CASEMBC(0x1ef9) - regmbc('y'); regmbc('\375'); regmbc('\377'); - REGMBC(0x177) REGMBC(0x1e8f) REGMBC(0x1e99) - REGMBC(0x1ef3) REGMBC(0x1ef7) REGMBC(0x1ef9) - return; - case 'z': CASEMBC(0x17a) CASEMBC(0x17c) CASEMBC(0x17e) - CASEMBC(0x1b6) CASEMBC(0x1e91) CASEMBC(0x1e95) - regmbc('z'); REGMBC(0x17a) REGMBC(0x17c) - REGMBC(0x17e) REGMBC(0x1b6) REGMBC(0x1e91) - REGMBC(0x1e95) - return; - } - } - regmbc(c); -} - -/* - * Check for a collating element "[.a.]". "pp" points to the '['. - * Returns a character. Zero means that no item was recognized. Otherwise - * "pp" is advanced to after the item. - * Currently only single characters are recognized! - */ -static int get_coll_element(char_u **pp) -{ - int c; - int l = 1; - char_u *p = *pp; - - if (p[1] == '.') { - if (has_mbyte) - l = (*mb_ptr2len)(p + 2); - if (p[l + 2] == '.' && p[l + 3] == ']') { - if (has_mbyte) - c = mb_ptr2char(p + 2); - else - c = p[2]; - *pp += l + 4; - return c; - } - } - return 0; -} - -static void get_cpo_flags(void); -static int reg_cpo_lit; /* 'cpoptions' contains 'l' flag */ -static int reg_cpo_bsl; /* 'cpoptions' contains '\' flag */ - -static void get_cpo_flags(void) -{ - reg_cpo_lit = vim_strchr(p_cpo, CPO_LITERAL) != NULL; - reg_cpo_bsl = vim_strchr(p_cpo, CPO_BACKSL) != NULL; -} - -/* - * Skip over a "[]" range. - * "p" must point to the character after the '['. - * The returned pointer is on the matching ']', or the terminating NUL. - */ -static char_u *skip_anyof(char_u *p) -{ - int l; - - if (*p == '^') /* Complement of range. */ - ++p; - if (*p == ']' || *p == '-') - ++p; - while (*p != NUL && *p != ']') { - if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1) - p += l; - else if (*p == '-') { - ++p; - if (*p != ']' && *p != NUL) - mb_ptr_adv(p); - } else if (*p == '\\' - && !reg_cpo_bsl - && (vim_strchr(REGEXP_INRANGE, p[1]) != NULL - || (!reg_cpo_lit && vim_strchr(REGEXP_ABBR, p[1]) != NULL))) - p += 2; - else if (*p == '[') { - if (get_char_class(&p) == CLASS_NONE - && get_equi_class(&p) == 0 - && get_coll_element(&p) == 0) - ++p; /* It was not a class name */ - } else - ++p; - } - - return p; -} - -/* - * Skip past regular expression. - * Stop at end of "startp" or where "dirc" is found ('/', '?', etc). - * Take care of characters with a backslash in front of it. - * Skip strings inside [ and ]. - * When "newp" is not NULL and "dirc" is '?', make an allocated copy of the - * expression and change "\?" to "?". If "*newp" is not NULL the expression - * is changed in-place. - */ -char_u *skip_regexp(char_u *startp, int dirc, int magic, char_u **newp) -{ - int mymagic; - char_u *p = startp; - - if (magic) - mymagic = MAGIC_ON; - else - mymagic = MAGIC_OFF; - get_cpo_flags(); - - for (; p[0] != NUL; mb_ptr_adv(p)) { - if (p[0] == dirc) /* found end of regexp */ - break; - if ((p[0] == '[' && mymagic >= MAGIC_ON) - || (p[0] == '\\' && p[1] == '[' && mymagic <= MAGIC_OFF)) { - p = skip_anyof(p + 1); - if (p[0] == NUL) - break; - } else if (p[0] == '\\' && p[1] != NUL) { - if (dirc == '?' && newp != NULL && p[1] == '?') { - /* change "\?" to "?", make a copy first. */ - if (*newp == NULL) { - *newp = vim_strsave(startp); - if (*newp != NULL) - p = *newp + (p - startp); - } - if (*newp != NULL) - STRMOVE(p, p + 1); - else - ++p; - } else - ++p; /* skip next character */ - if (*p == 'v') - mymagic = MAGIC_ALL; - else if (*p == 'V') - mymagic = MAGIC_NONE; - } - } - return p; -} - -static regprog_T *bt_regcomp(char_u *expr, int re_flags); -static void bt_regfree(regprog_T *prog); - -/* - * bt_regcomp() - compile a regular expression into internal code for the - * traditional back track matcher. - * Returns the program in allocated space. Returns NULL for an error. - * - * We can't allocate space until we know how big the compiled form will be, - * but we can't compile it (and thus know how big it is) until we've got a - * place to put the code. So we cheat: we compile it twice, once with code - * generation turned off and size counting turned on, and once "for real". - * This also means that we don't allocate space until we are sure that the - * thing really will compile successfully, and we never have to move the - * code and thus invalidate pointers into it. (Note that it has to be in - * one piece because free() must be able to free it all.) - * - * Whether upper/lower case is to be ignored is decided when executing the - * program, it does not matter here. - * - * Beware that the optimization-preparation code in here knows about some - * of the structure of the compiled regexp. - * "re_flags": RE_MAGIC and/or RE_STRING. - */ -static regprog_T *bt_regcomp(char_u *expr, int re_flags) -{ - char_u *scan; - char_u *longest; - int len; - int flags; - - if (expr == NULL) - EMSG_RET_NULL(_(e_null)); - - init_class_tab(); - - /* - * First pass: determine size, legality. - */ - regcomp_start(expr, re_flags); - regcode = JUST_CALC_SIZE; - regc(REGMAGIC); - if (reg(REG_NOPAREN, &flags) == NULL) - return NULL; - - /* Small enough for pointer-storage convention? */ -#ifdef SMALL_MALLOC /* 16 bit storage allocation */ - if (regsize >= 65536L - 256L) - EMSG_RET_NULL(_("E339: Pattern too long")); -#endif - - /* Allocate space. */ - bt_regprog_T *r = xmalloc(sizeof(bt_regprog_T) + regsize); - - /* - * Second pass: emit code. - */ - regcomp_start(expr, re_flags); - regcode = r->program; - regc(REGMAGIC); - if (reg(REG_NOPAREN, &flags) == NULL || reg_toolong) { - free(r); - if (reg_toolong) - EMSG_RET_NULL(_("E339: Pattern too long")); - return NULL; - } - - /* Dig out information for optimizations. */ - r->regstart = NUL; /* Worst-case defaults. */ - r->reganch = 0; - r->regmust = NULL; - r->regmlen = 0; - r->regflags = regflags; - if (flags & HASNL) - r->regflags |= RF_HASNL; - if (flags & HASLOOKBH) - r->regflags |= RF_LOOKBH; - /* Remember whether this pattern has any \z specials in it. */ - r->reghasz = re_has_z; - scan = r->program + 1; /* First BRANCH. */ - if (OP(regnext(scan)) == END) { /* Only one top-level choice. */ - scan = OPERAND(scan); - - /* Starting-point info. */ - if (OP(scan) == BOL || OP(scan) == RE_BOF) { - r->reganch++; - scan = regnext(scan); - } - - if (OP(scan) == EXACTLY) { - if (has_mbyte) - r->regstart = (*mb_ptr2char)(OPERAND(scan)); - else - r->regstart = *OPERAND(scan); - } else if ((OP(scan) == BOW - || OP(scan) == EOW - || OP(scan) == NOTHING - || OP(scan) == MOPEN + 0 || OP(scan) == NOPEN - || OP(scan) == MCLOSE + 0 || OP(scan) == NCLOSE) - && OP(regnext(scan)) == EXACTLY) { - if (has_mbyte) - r->regstart = (*mb_ptr2char)(OPERAND(regnext(scan))); - else - r->regstart = *OPERAND(regnext(scan)); - } - - /* - * If there's something expensive in the r.e., find the longest - * literal string that must appear and make it the regmust. Resolve - * ties in favor of later strings, since the regstart check works - * with the beginning of the r.e. and avoiding duplication - * strengthens checking. Not a strong reason, but sufficient in the - * absence of others. - */ - /* - * When the r.e. starts with BOW, it is faster to look for a regmust - * first. Used a lot for "#" and "*" commands. (Added by mool). - */ - if ((flags & SPSTART || OP(scan) == BOW || OP(scan) == EOW) - && !(flags & HASNL)) { - longest = NULL; - len = 0; - for (; scan != NULL; scan = regnext(scan)) - if (OP(scan) == EXACTLY && STRLEN(OPERAND(scan)) >= (size_t)len) { - longest = OPERAND(scan); - len = (int)STRLEN(OPERAND(scan)); - } - r->regmust = longest; - r->regmlen = len; - } - } -#ifdef BT_REGEXP_DUMP - regdump(expr, r); -#endif - r->engine = &bt_regengine; - return (regprog_T *)r; -} - -/* - * Free a compiled regexp program, returned by bt_regcomp(). - */ -static void bt_regfree(regprog_T *prog) -{ - free(prog); -} - -/* - * Setup to parse the regexp. Used once to get the length and once to do it. - */ -static void -regcomp_start ( - char_u *expr, - int re_flags /* see vim_regcomp() */ -) -{ - initchr(expr); - if (re_flags & RE_MAGIC) - reg_magic = MAGIC_ON; - else - reg_magic = MAGIC_OFF; - reg_string = (re_flags & RE_STRING); - reg_strict = (re_flags & RE_STRICT); - get_cpo_flags(); - - num_complex_braces = 0; - regnpar = 1; - memset(had_endbrace, 0, sizeof(had_endbrace)); - regnzpar = 1; - re_has_z = 0; - regsize = 0L; - reg_toolong = FALSE; - regflags = 0; - had_eol = FALSE; -} - -/* - * Check if during the previous call to vim_regcomp the EOL item "$" has been - * found. This is messy, but it works fine. - */ -int vim_regcomp_had_eol(void) -{ - return had_eol; -} - -/* - * Parse regular expression, i.e. main body or parenthesized thing. - * - * Caller must absorb opening parenthesis. - * - * Combining parenthesis handling with the base level of regular expression - * is a trifle forced, but the need to tie the tails of the branches to what - * follows makes it hard to avoid. - */ -static char_u * -reg ( - int paren, /* REG_NOPAREN, REG_PAREN, REG_NPAREN or REG_ZPAREN */ - int *flagp -) -{ - char_u *ret; - char_u *br; - char_u *ender; - int parno = 0; - int flags; - - *flagp = HASWIDTH; /* Tentatively. */ - - if (paren == REG_ZPAREN) { - /* Make a ZOPEN node. */ - if (regnzpar >= NSUBEXP) - EMSG_RET_NULL(_("E50: Too many \\z(")); - parno = regnzpar; - regnzpar++; - ret = regnode(ZOPEN + parno); - } else if (paren == REG_PAREN) { - /* Make a MOPEN node. */ - if (regnpar >= NSUBEXP) - EMSG2_RET_NULL(_("E51: Too many %s("), reg_magic == MAGIC_ALL); - parno = regnpar; - ++regnpar; - ret = regnode(MOPEN + parno); - } else if (paren == REG_NPAREN) { - /* Make a NOPEN node. */ - ret = regnode(NOPEN); - } else - ret = NULL; - - /* Pick up the branches, linking them together. */ - br = regbranch(&flags); - if (br == NULL) - return NULL; - if (ret != NULL) - regtail(ret, br); /* [MZ]OPEN -> first. */ - else - ret = br; - /* If one of the branches can be zero-width, the whole thing can. - * If one of the branches has * at start or matches a line-break, the - * whole thing can. */ - if (!(flags & HASWIDTH)) - *flagp &= ~HASWIDTH; - *flagp |= flags & (SPSTART | HASNL | HASLOOKBH); - while (peekchr() == Magic('|')) { - skipchr(); - br = regbranch(&flags); - if (br == NULL || reg_toolong) - return NULL; - regtail(ret, br); /* BRANCH -> BRANCH. */ - if (!(flags & HASWIDTH)) - *flagp &= ~HASWIDTH; - *flagp |= flags & (SPSTART | HASNL | HASLOOKBH); - } - - /* Make a closing node, and hook it on the end. */ - ender = regnode( - paren == REG_ZPAREN ? ZCLOSE + parno : - paren == REG_PAREN ? MCLOSE + parno : - paren == REG_NPAREN ? NCLOSE : END); - regtail(ret, ender); - - /* Hook the tails of the branches to the closing node. */ - for (br = ret; br != NULL; br = regnext(br)) - regoptail(br, ender); - - /* Check for proper termination. */ - if (paren != REG_NOPAREN && getchr() != Magic(')')) { - if (paren == REG_ZPAREN) - EMSG_RET_NULL(_("E52: Unmatched \\z(")); - else if (paren == REG_NPAREN) - EMSG2_RET_NULL(_(e_unmatchedpp), reg_magic == MAGIC_ALL); - else - EMSG2_RET_NULL(_(e_unmatchedp), reg_magic == MAGIC_ALL); - } else if (paren == REG_NOPAREN && peekchr() != NUL) { - if (curchr == Magic(')')) - EMSG2_RET_NULL(_(e_unmatchedpar), reg_magic == MAGIC_ALL); - else - EMSG_RET_NULL(_(e_trailing)); /* "Can't happen". */ - /* NOTREACHED */ - } - /* - * Here we set the flag allowing back references to this set of - * parentheses. - */ - if (paren == REG_PAREN) - had_endbrace[parno] = TRUE; /* have seen the close paren */ - return ret; -} - -/* - * Parse one alternative of an | operator. - * Implements the & operator. - */ -static char_u *regbranch(int *flagp) -{ - char_u *ret; - char_u *chain = NULL; - char_u *latest; - int flags; - - *flagp = WORST | HASNL; /* Tentatively. */ - - ret = regnode(BRANCH); - for (;; ) { - latest = regconcat(&flags); - if (latest == NULL) - return NULL; - /* If one of the branches has width, the whole thing has. If one of - * the branches anchors at start-of-line, the whole thing does. - * If one of the branches uses look-behind, the whole thing does. */ - *flagp |= flags & (HASWIDTH | SPSTART | HASLOOKBH); - /* If one of the branches doesn't match a line-break, the whole thing - * doesn't. */ - *flagp &= ~HASNL | (flags & HASNL); - if (chain != NULL) - regtail(chain, latest); - if (peekchr() != Magic('&')) - break; - skipchr(); - regtail(latest, regnode(END)); /* operand ends */ - if (reg_toolong) - break; - reginsert(MATCH, latest); - chain = latest; - } - - return ret; -} - -/* - * Parse one alternative of an | or & operator. - * Implements the concatenation operator. - */ -static char_u *regconcat(int *flagp) -{ - char_u *first = NULL; - char_u *chain = NULL; - char_u *latest; - int flags; - int cont = TRUE; - - *flagp = WORST; /* Tentatively. */ - - while (cont) { - switch (peekchr()) { - case NUL: - case Magic('|'): - case Magic('&'): - case Magic(')'): - cont = FALSE; - break; - case Magic('Z'): - regflags |= RF_ICOMBINE; - skipchr_keepstart(); - break; - case Magic('c'): - regflags |= RF_ICASE; - skipchr_keepstart(); - break; - case Magic('C'): - regflags |= RF_NOICASE; - skipchr_keepstart(); - break; - case Magic('v'): - reg_magic = MAGIC_ALL; - skipchr_keepstart(); - curchr = -1; - break; - case Magic('m'): - reg_magic = MAGIC_ON; - skipchr_keepstart(); - curchr = -1; - break; - case Magic('M'): - reg_magic = MAGIC_OFF; - skipchr_keepstart(); - curchr = -1; - break; - case Magic('V'): - reg_magic = MAGIC_NONE; - skipchr_keepstart(); - curchr = -1; - break; - default: - latest = regpiece(&flags); - if (latest == NULL || reg_toolong) - return NULL; - *flagp |= flags & (HASWIDTH | HASNL | HASLOOKBH); - if (chain == NULL) /* First piece. */ - *flagp |= flags & SPSTART; - else - regtail(chain, latest); - chain = latest; - if (first == NULL) - first = latest; - break; - } - } - if (first == NULL) /* Loop ran zero times. */ - first = regnode(NOTHING); - return first; -} - -/* - * Parse something followed by possible [*+=]. - * - * Note that the branching code sequences used for = and the general cases - * of * and + are somewhat optimized: they use the same NOTHING node as - * both the endmarker for their branch list and the body of the last branch. - * It might seem that this node could be dispensed with entirely, but the - * endmarker role is not redundant. - */ -static char_u *regpiece(int *flagp) -{ - char_u *ret; - int op; - char_u *next; - int flags; - long minval; - long maxval; - - ret = regatom(&flags); - if (ret == NULL) - return NULL; - - op = peekchr(); - if (re_multi_type(op) == NOT_MULTI) { - *flagp = flags; - return ret; - } - /* default flags */ - *flagp = (WORST | SPSTART | (flags & (HASNL | HASLOOKBH))); - - skipchr(); - switch (op) { - case Magic('*'): - if (flags & SIMPLE) - reginsert(STAR, ret); - else { - /* Emit x* as (x&|), where & means "self". */ - reginsert(BRANCH, ret); /* Either x */ - regoptail(ret, regnode(BACK)); /* and loop */ - regoptail(ret, ret); /* back */ - regtail(ret, regnode(BRANCH)); /* or */ - regtail(ret, regnode(NOTHING)); /* null. */ - } - break; - - case Magic('+'): - if (flags & SIMPLE) - reginsert(PLUS, ret); - else { - /* Emit x+ as x(&|), where & means "self". */ - next = regnode(BRANCH); /* Either */ - regtail(ret, next); - regtail(regnode(BACK), ret); /* loop back */ - regtail(next, regnode(BRANCH)); /* or */ - regtail(ret, regnode(NOTHING)); /* null. */ - } - *flagp = (WORST | HASWIDTH | (flags & (HASNL | HASLOOKBH))); - break; - - case Magic('@'): - { - int lop = END; - int nr; - - nr = getdecchrs(); - switch (no_Magic(getchr())) { - case '=': lop = MATCH; break; /* \@= */ - case '!': lop = NOMATCH; break; /* \@! */ - case '>': lop = SUBPAT; break; /* \@> */ - case '<': switch (no_Magic(getchr())) { - case '=': lop = BEHIND; break; /* \@<= */ - case '!': lop = NOBEHIND; break; /* \@<! */ - } - } - if (lop == END) - EMSG2_RET_NULL(_("E59: invalid character after %s@"), - reg_magic == MAGIC_ALL); - /* Look behind must match with behind_pos. */ - if (lop == BEHIND || lop == NOBEHIND) { - regtail(ret, regnode(BHPOS)); - *flagp |= HASLOOKBH; - } - regtail(ret, regnode(END)); /* operand ends */ - if (lop == BEHIND || lop == NOBEHIND) { - if (nr < 0) - nr = 0; /* no limit is same as zero limit */ - reginsert_nr(lop, nr, ret); - } else - reginsert(lop, ret); - break; - } - - case Magic('?'): - case Magic('='): - /* Emit x= as (x|) */ - reginsert(BRANCH, ret); /* Either x */ - regtail(ret, regnode(BRANCH)); /* or */ - next = regnode(NOTHING); /* null. */ - regtail(ret, next); - regoptail(ret, next); - break; - - case Magic('{'): - if (!read_limits(&minval, &maxval)) - return NULL; - if (flags & SIMPLE) { - reginsert(BRACE_SIMPLE, ret); - reginsert_limits(BRACE_LIMITS, minval, maxval, ret); - } else { - if (num_complex_braces >= 10) - EMSG2_RET_NULL(_("E60: Too many complex %s{...}s"), - reg_magic == MAGIC_ALL); - reginsert(BRACE_COMPLEX + num_complex_braces, ret); - regoptail(ret, regnode(BACK)); - regoptail(ret, ret); - reginsert_limits(BRACE_LIMITS, minval, maxval, ret); - ++num_complex_braces; - } - if (minval > 0 && maxval > 0) - *flagp = (HASWIDTH | (flags & (HASNL | HASLOOKBH))); - break; - } - if (re_multi_type(peekchr()) != NOT_MULTI) { - /* Can't have a multi follow a multi. */ - if (peekchr() == Magic('*')) - sprintf((char *)IObuff, _("E61: Nested %s*"), - reg_magic >= MAGIC_ON ? "" : "\\"); - else - sprintf((char *)IObuff, _("E62: Nested %s%c"), - reg_magic == MAGIC_ALL ? "" : "\\", no_Magic(peekchr())); - EMSG_RET_NULL(IObuff); - } - - return ret; -} - -/* When making changes to classchars also change nfa_classcodes. */ -static char_u *classchars = (char_u *)".iIkKfFpPsSdDxXoOwWhHaAlLuU"; -static int classcodes[] = { - ANY, IDENT, SIDENT, KWORD, SKWORD, - FNAME, SFNAME, PRINT, SPRINT, - WHITE, NWHITE, DIGIT, NDIGIT, - HEX, NHEX, OCTAL, NOCTAL, - WORD, NWORD, HEAD, NHEAD, - ALPHA, NALPHA, LOWER, NLOWER, - UPPER, NUPPER -}; - -/* - * Parse the lowest level. - * - * Optimization: gobbles an entire sequence of ordinary characters so that - * it can turn them into a single node, which is smaller to store and - * faster to run. Don't do this when one_exactly is set. - */ -static char_u *regatom(int *flagp) -{ - char_u *ret; - int flags; - int c; - char_u *p; - int extra = 0; - - *flagp = WORST; /* Tentatively. */ - - c = getchr(); - switch (c) { - case Magic('^'): - ret = regnode(BOL); - break; - - case Magic('$'): - ret = regnode(EOL); - had_eol = TRUE; - break; - - case Magic('<'): - ret = regnode(BOW); - break; - - case Magic('>'): - ret = regnode(EOW); - break; - - case Magic('_'): - c = no_Magic(getchr()); - if (c == '^') { /* "\_^" is start-of-line */ - ret = regnode(BOL); - break; - } - if (c == '$') { /* "\_$" is end-of-line */ - ret = regnode(EOL); - had_eol = TRUE; - break; - } - - extra = ADD_NL; - *flagp |= HASNL; - - /* "\_[" is character range plus newline */ - if (c == '[') - goto collection; - - /* "\_x" is character class plus newline */ - /*FALLTHROUGH*/ - - /* - * Character classes. - */ - case Magic('.'): - case Magic('i'): - case Magic('I'): - case Magic('k'): - case Magic('K'): - case Magic('f'): - case Magic('F'): - case Magic('p'): - case Magic('P'): - case Magic('s'): - case Magic('S'): - case Magic('d'): - case Magic('D'): - case Magic('x'): - case Magic('X'): - case Magic('o'): - case Magic('O'): - case Magic('w'): - case Magic('W'): - case Magic('h'): - case Magic('H'): - case Magic('a'): - case Magic('A'): - case Magic('l'): - case Magic('L'): - case Magic('u'): - case Magic('U'): - p = vim_strchr(classchars, no_Magic(c)); - if (p == NULL) - EMSG_RET_NULL(_("E63: invalid use of \\_")); - /* When '.' is followed by a composing char ignore the dot, so that - * the composing char is matched here. */ - if (enc_utf8 && c == Magic('.') && utf_iscomposing(peekchr())) { - c = getchr(); - goto do_multibyte; - } - ret = regnode(classcodes[p - classchars] + extra); - *flagp |= HASWIDTH | SIMPLE; - break; - - case Magic('n'): - if (reg_string) { - /* In a string "\n" matches a newline character. */ - ret = regnode(EXACTLY); - regc(NL); - regc(NUL); - *flagp |= HASWIDTH | SIMPLE; - } else { - /* In buffer text "\n" matches the end of a line. */ - ret = regnode(NEWL); - *flagp |= HASWIDTH | HASNL; - } - break; - - case Magic('('): - if (one_exactly) - EMSG_ONE_RET_NULL; - ret = reg(REG_PAREN, &flags); - if (ret == NULL) - return NULL; - *flagp |= flags & (HASWIDTH | SPSTART | HASNL | HASLOOKBH); - break; - - case NUL: - case Magic('|'): - case Magic('&'): - case Magic(')'): - if (one_exactly) - EMSG_ONE_RET_NULL; - EMSG_RET_NULL(_(e_internal)); /* Supposed to be caught earlier. */ - /* NOTREACHED */ - - case Magic('='): - case Magic('?'): - case Magic('+'): - case Magic('@'): - case Magic('{'): - case Magic('*'): - c = no_Magic(c); - sprintf((char *)IObuff, _("E64: %s%c follows nothing"), - (c == '*' ? reg_magic >= MAGIC_ON : reg_magic == MAGIC_ALL) - ? "" : "\\", c); - EMSG_RET_NULL(IObuff); - /* NOTREACHED */ - - case Magic('~'): /* previous substitute pattern */ - if (reg_prev_sub != NULL) { - char_u *lp; - - ret = regnode(EXACTLY); - lp = reg_prev_sub; - while (*lp != NUL) - regc(*lp++); - regc(NUL); - if (*reg_prev_sub != NUL) { - *flagp |= HASWIDTH; - if ((lp - reg_prev_sub) == 1) - *flagp |= SIMPLE; - } - } else - EMSG_RET_NULL(_(e_nopresub)); - break; - - case Magic('1'): - case Magic('2'): - case Magic('3'): - case Magic('4'): - case Magic('5'): - case Magic('6'): - case Magic('7'): - case Magic('8'): - case Magic('9'): - { - int refnum; - - refnum = c - Magic('0'); - /* - * Check if the back reference is legal. We must have seen the - * close brace. - * TODO: Should also check that we don't refer to something - * that is repeated (+*=): what instance of the repetition - * should we match? - */ - if (!had_endbrace[refnum]) { - /* Trick: check if "@<=" or "@<!" follows, in which case - * the \1 can appear before the referenced match. */ - for (p = regparse; *p != NUL; ++p) - if (p[0] == '@' && p[1] == '<' - && (p[2] == '!' || p[2] == '=')) - break; - if (*p == NUL) - EMSG_RET_NULL(_("E65: Illegal back reference")); - } - ret = regnode(BACKREF + refnum); - } - break; - - case Magic('z'): - { - c = no_Magic(getchr()); - switch (c) { - case '(': if (reg_do_extmatch != REX_SET) - EMSG_RET_NULL(_(e_z_not_allowed)); - if (one_exactly) - EMSG_ONE_RET_NULL; - ret = reg(REG_ZPAREN, &flags); - if (ret == NULL) - return NULL; - *flagp |= flags & (HASWIDTH|SPSTART|HASNL|HASLOOKBH); - re_has_z = REX_SET; - break; - - case '1': - case '2': - case '3': - case '4': - case '5': - case '6': - case '7': - case '8': - case '9': if (reg_do_extmatch != REX_USE) - EMSG_RET_NULL(_(e_z1_not_allowed)); - ret = regnode(ZREF + c - '0'); - re_has_z = REX_USE; - break; - - case 's': ret = regnode(MOPEN + 0); - break; - - case 'e': ret = regnode(MCLOSE + 0); - break; - - default: EMSG_RET_NULL(_("E68: Invalid character after \\z")); - } - } - break; - - case Magic('%'): - { - c = no_Magic(getchr()); - switch (c) { - /* () without a back reference */ - case '(': - if (one_exactly) - EMSG_ONE_RET_NULL; - ret = reg(REG_NPAREN, &flags); - if (ret == NULL) - return NULL; - *flagp |= flags & (HASWIDTH | SPSTART | HASNL | HASLOOKBH); - break; - - /* Catch \%^ and \%$ regardless of where they appear in the - * pattern -- regardless of whether or not it makes sense. */ - case '^': - ret = regnode(RE_BOF); - break; - - case '$': - ret = regnode(RE_EOF); - break; - - case '#': - ret = regnode(CURSOR); - break; - - case 'V': - ret = regnode(RE_VISUAL); - break; - - /* \%[abc]: Emit as a list of branches, all ending at the last - * branch which matches nothing. */ - case '[': - if (one_exactly) /* doesn't nest */ - EMSG_ONE_RET_NULL; - { - char_u *lastbranch; - char_u *lastnode = NULL; - char_u *br; - - ret = NULL; - while ((c = getchr()) != ']') { - if (c == NUL) - EMSG2_RET_NULL(_(e_missing_sb), - reg_magic == MAGIC_ALL); - br = regnode(BRANCH); - if (ret == NULL) - ret = br; - else - regtail(lastnode, br); - - ungetchr(); - one_exactly = TRUE; - lastnode = regatom(flagp); - one_exactly = FALSE; - if (lastnode == NULL) - return NULL; - } - if (ret == NULL) - EMSG2_RET_NULL(_(e_empty_sb), - reg_magic == MAGIC_ALL); - lastbranch = regnode(BRANCH); - br = regnode(NOTHING); - if (ret != JUST_CALC_SIZE) { - regtail(lastnode, br); - regtail(lastbranch, br); - /* connect all branches to the NOTHING - * branch at the end */ - for (br = ret; br != lastnode; ) { - if (OP(br) == BRANCH) { - regtail(br, lastbranch); - br = OPERAND(br); - } else - br = regnext(br); - } - } - *flagp &= ~(HASWIDTH | SIMPLE); - break; - } - - case 'd': /* %d123 decimal */ - case 'o': /* %o123 octal */ - case 'x': /* %xab hex 2 */ - case 'u': /* %uabcd hex 4 */ - case 'U': /* %U1234abcd hex 8 */ - { - int i; - - switch (c) { - case 'd': i = getdecchrs(); break; - case 'o': i = getoctchrs(); break; - case 'x': i = gethexchrs(2); break; - case 'u': i = gethexchrs(4); break; - case 'U': i = gethexchrs(8); break; - default: i = -1; break; - } - - if (i < 0) - EMSG2_RET_NULL( - _("E678: Invalid character after %s%%[dxouU]"), - reg_magic == MAGIC_ALL); - if (use_multibytecode(i)) - ret = regnode(MULTIBYTECODE); - else - ret = regnode(EXACTLY); - if (i == 0) - regc(0x0a); - else - regmbc(i); - regc(NUL); - *flagp |= HASWIDTH; - break; - } - - default: - if (VIM_ISDIGIT(c) || c == '<' || c == '>' - || c == '\'') { - long_u n = 0; - int cmp; - - cmp = c; - if (cmp == '<' || cmp == '>') - c = getchr(); - while (VIM_ISDIGIT(c)) { - n = n * 10 + (c - '0'); - c = getchr(); - } - if (c == '\'' && n == 0) { - /* "\%'m", "\%<'m" and "\%>'m": Mark */ - c = getchr(); - ret = regnode(RE_MARK); - if (ret == JUST_CALC_SIZE) - regsize += 2; - else { - *regcode++ = c; - *regcode++ = cmp; - } - break; - } else if (c == 'l' || c == 'c' || c == 'v') { - if (c == 'l') - ret = regnode(RE_LNUM); - else if (c == 'c') - ret = regnode(RE_COL); - else - ret = regnode(RE_VCOL); - if (ret == JUST_CALC_SIZE) - regsize += 5; - else { - /* put the number and the optional - * comparator after the opcode */ - regcode = re_put_long(regcode, n); - *regcode++ = cmp; - } - break; - } - } - - EMSG2_RET_NULL(_("E71: Invalid character after %s%%"), - reg_magic == MAGIC_ALL); - } - } - break; - - case Magic('['): -collection: - { - char_u *lp; - - /* - * If there is no matching ']', we assume the '[' is a normal - * character. This makes 'incsearch' and ":help [" work. - */ - lp = skip_anyof(regparse); - if (*lp == ']') { /* there is a matching ']' */ - int startc = -1; /* > 0 when next '-' is a range */ - int endc; - - /* - * In a character class, different parsing rules apply. - * Not even \ is special anymore, nothing is. - */ - if (*regparse == '^') { /* Complement of range. */ - ret = regnode(ANYBUT + extra); - regparse++; - } else - ret = regnode(ANYOF + extra); - - /* At the start ']' and '-' mean the literal character. */ - if (*regparse == ']' || *regparse == '-') { - startc = *regparse; - regc(*regparse++); - } - - while (*regparse != NUL && *regparse != ']') { - if (*regparse == '-') { - ++regparse; - /* The '-' is not used for a range at the end and - * after or before a '\n'. */ - if (*regparse == ']' || *regparse == NUL - || startc == -1 - || (regparse[0] == '\\' && regparse[1] == 'n')) { - regc('-'); - startc = '-'; /* [--x] is a range */ - } else { - /* Also accept "a-[.z.]" */ - endc = 0; - if (*regparse == '[') - endc = get_coll_element(®parse); - if (endc == 0) { - if (has_mbyte) - endc = mb_ptr2char_adv(®parse); - else - endc = *regparse++; - } - - /* Handle \o40, \x20 and \u20AC style sequences */ - if (endc == '\\' && !reg_cpo_lit && !reg_cpo_bsl) - endc = coll_get_char(); - - if (startc > endc) - EMSG_RET_NULL(_(e_invrange)); - if (has_mbyte && ((*mb_char2len)(startc) > 1 - || (*mb_char2len)(endc) > 1)) { - /* Limit to a range of 256 chars */ - if (endc > startc + 256) - EMSG_RET_NULL(_(e_invrange)); - while (++startc <= endc) - regmbc(startc); - } else { - while (++startc <= endc) - regc(startc); - } - startc = -1; - } - } - /* - * Only "\]", "\^", "\]" and "\\" are special in Vi. Vim - * accepts "\t", "\e", etc., but only when the 'l' flag in - * 'cpoptions' is not included. - * Posix doesn't recognize backslash at all. - */ - else if (*regparse == '\\' - && !reg_cpo_bsl - && (vim_strchr(REGEXP_INRANGE, regparse[1]) != NULL - || (!reg_cpo_lit - && vim_strchr(REGEXP_ABBR, - regparse[1]) != NULL))) { - regparse++; - if (*regparse == 'n') { - /* '\n' in range: also match NL */ - if (ret != JUST_CALC_SIZE) { - /* Using \n inside [^] does not change what - * matches. "[^\n]" is the same as ".". */ - if (*ret == ANYOF) { - *ret = ANYOF + ADD_NL; - *flagp |= HASNL; - } - /* else: must have had a \n already */ - } - regparse++; - startc = -1; - } else if (*regparse == 'd' - || *regparse == 'o' - || *regparse == 'x' - || *regparse == 'u' - || *regparse == 'U') { - startc = coll_get_char(); - if (startc == 0) - regc(0x0a); - else - regmbc(startc); - } else { - startc = backslash_trans(*regparse++); - regc(startc); - } - } else if (*regparse == '[') { - int c_class; - int cu; - - c_class = get_char_class(®parse); - startc = -1; - /* Characters assumed to be 8 bits! */ - switch (c_class) { - case CLASS_NONE: - c_class = get_equi_class(®parse); - if (c_class != 0) { - /* produce equivalence class */ - reg_equi_class(c_class); - } else if ((c_class = - get_coll_element(®parse)) != 0) { - /* produce a collating element */ - regmbc(c_class); - } else { - /* literal '[', allow [[-x] as a range */ - startc = *regparse++; - regc(startc); - } - break; - case CLASS_ALNUM: - for (cu = 1; cu <= 255; cu++) - if (isalnum(cu)) - regc(cu); - break; - case CLASS_ALPHA: - for (cu = 1; cu <= 255; cu++) - if (isalpha(cu)) - regc(cu); - break; - case CLASS_BLANK: - regc(' '); - regc('\t'); - break; - case CLASS_CNTRL: - for (cu = 1; cu <= 255; cu++) - if (iscntrl(cu)) - regc(cu); - break; - case CLASS_DIGIT: - for (cu = 1; cu <= 255; cu++) - if (VIM_ISDIGIT(cu)) - regc(cu); - break; - case CLASS_GRAPH: - for (cu = 1; cu <= 255; cu++) - if (isgraph(cu)) - regc(cu); - break; - case CLASS_LOWER: - for (cu = 1; cu <= 255; cu++) - if (vim_islower(cu)) - regc(cu); - break; - case CLASS_PRINT: - for (cu = 1; cu <= 255; cu++) - if (vim_isprintc(cu)) - regc(cu); - break; - case CLASS_PUNCT: - for (cu = 1; cu <= 255; cu++) - if (ispunct(cu)) - regc(cu); - break; - case CLASS_SPACE: - for (cu = 9; cu <= 13; cu++) - regc(cu); - regc(' '); - break; - case CLASS_UPPER: - for (cu = 1; cu <= 255; cu++) - if (vim_isupper(cu)) - regc(cu); - break; - case CLASS_XDIGIT: - for (cu = 1; cu <= 255; cu++) - if (vim_isxdigit(cu)) - regc(cu); - break; - case CLASS_TAB: - regc('\t'); - break; - case CLASS_RETURN: - regc('\r'); - break; - case CLASS_BACKSPACE: - regc('\b'); - break; - case CLASS_ESCAPE: - regc('\033'); - break; - } - } else { - if (has_mbyte) { - int len; - - /* produce a multibyte character, including any - * following composing characters */ - startc = mb_ptr2char(regparse); - len = (*mb_ptr2len)(regparse); - if (enc_utf8 && utf_char2len(startc) != len) - startc = -1; /* composing chars */ - while (--len >= 0) - regc(*regparse++); - } else { - startc = *regparse++; - regc(startc); - } - } - } - regc(NUL); - prevchr_len = 1; /* last char was the ']' */ - if (*regparse != ']') - EMSG_RET_NULL(_(e_toomsbra)); /* Cannot happen? */ - skipchr(); /* let's be friends with the lexer again */ - *flagp |= HASWIDTH | SIMPLE; - break; - } else if (reg_strict) - EMSG2_RET_NULL(_(e_missingbracket), reg_magic > MAGIC_OFF); - } - /* FALLTHROUGH */ - - default: - { - int len; - - /* A multi-byte character is handled as a separate atom if it's - * before a multi and when it's a composing char. */ - if (use_multibytecode(c)) { -do_multibyte: - ret = regnode(MULTIBYTECODE); - regmbc(c); - *flagp |= HASWIDTH | SIMPLE; - break; - } - - ret = regnode(EXACTLY); - - /* - * Append characters as long as: - * - there is no following multi, we then need the character in - * front of it as a single character operand - * - not running into a Magic character - * - "one_exactly" is not set - * But always emit at least one character. Might be a Multi, - * e.g., a "[" without matching "]". - */ - for (len = 0; c != NUL && (len == 0 - || (re_multi_type(peekchr()) == NOT_MULTI - && !one_exactly - && !is_Magic(c))); ++len) { - c = no_Magic(c); - if (has_mbyte) { - regmbc(c); - if (enc_utf8) { - int l; - - /* Need to get composing character too. */ - for (;; ) { - l = utf_ptr2len(regparse); - if (!UTF_COMPOSINGLIKE(regparse, regparse + l)) - break; - regmbc(utf_ptr2char(regparse)); - skipchr(); - } - } - } else - regc(c); - c = getchr(); - } - ungetchr(); - - regc(NUL); - *flagp |= HASWIDTH; - if (len == 1) - *flagp |= SIMPLE; - } - break; - } - - return ret; -} - -/* - * Return TRUE if MULTIBYTECODE should be used instead of EXACTLY for - * character "c". - */ -static int use_multibytecode(int c) -{ - return has_mbyte && (*mb_char2len)(c) > 1 - && (re_multi_type(peekchr()) != NOT_MULTI - || (enc_utf8 && utf_iscomposing(c))); -} - -/* - * Emit a node. - * Return pointer to generated code. - */ -static char_u *regnode(int op) -{ - char_u *ret; - - ret = regcode; - if (ret == JUST_CALC_SIZE) - regsize += 3; - else { - *regcode++ = op; - *regcode++ = NUL; /* Null "next" pointer. */ - *regcode++ = NUL; - } - return ret; -} - -/* - * Emit (if appropriate) a byte of code - */ -static void regc(int b) -{ - if (regcode == JUST_CALC_SIZE) - regsize++; - else - *regcode++ = b; -} - -/* - * Emit (if appropriate) a multi-byte character of code - */ -static void regmbc(int c) -{ - if (!has_mbyte && c > 0xff) - return; - if (regcode == JUST_CALC_SIZE) - regsize += (*mb_char2len)(c); - else - regcode += (*mb_char2bytes)(c, regcode); -} - -/* - * Insert an operator in front of already-emitted operand - * - * Means relocating the operand. - */ -static void reginsert(int op, char_u *opnd) -{ - char_u *src; - char_u *dst; - char_u *place; - - if (regcode == JUST_CALC_SIZE) { - regsize += 3; - return; - } - src = regcode; - regcode += 3; - dst = regcode; - while (src > opnd) - *--dst = *--src; - - place = opnd; /* Op node, where operand used to be. */ - *place++ = op; - *place++ = NUL; - *place = NUL; -} - -/* - * Insert an operator in front of already-emitted operand. - * Add a number to the operator. - */ -static void reginsert_nr(int op, long val, char_u *opnd) -{ - char_u *src; - char_u *dst; - char_u *place; - - if (regcode == JUST_CALC_SIZE) { - regsize += 7; - return; - } - src = regcode; - regcode += 7; - dst = regcode; - while (src > opnd) - *--dst = *--src; - - place = opnd; /* Op node, where operand used to be. */ - *place++ = op; - *place++ = NUL; - *place++ = NUL; - re_put_long(place, (long_u)val); -} - -/* - * Insert an operator in front of already-emitted operand. - * The operator has the given limit values as operands. Also set next pointer. - * - * Means relocating the operand. - */ -static void reginsert_limits(int op, long minval, long maxval, char_u *opnd) -{ - char_u *src; - char_u *dst; - char_u *place; - - if (regcode == JUST_CALC_SIZE) { - regsize += 11; - return; - } - src = regcode; - regcode += 11; - dst = regcode; - while (src > opnd) - *--dst = *--src; - - place = opnd; /* Op node, where operand used to be. */ - *place++ = op; - *place++ = NUL; - *place++ = NUL; - place = re_put_long(place, (long_u)minval); - place = re_put_long(place, (long_u)maxval); - regtail(opnd, place); -} - -/* - * Write a long as four bytes at "p" and return pointer to the next char. - */ -static char_u *re_put_long(char_u *p, long_u val) -{ - *p++ = (char_u) ((val >> 24) & 0377); - *p++ = (char_u) ((val >> 16) & 0377); - *p++ = (char_u) ((val >> 8) & 0377); - *p++ = (char_u) (val & 0377); - return p; -} - -/* - * Set the next-pointer at the end of a node chain. - */ -static void regtail(char_u *p, char_u *val) -{ - char_u *scan; - char_u *temp; - int offset; - - if (p == JUST_CALC_SIZE) - return; - - /* Find last node. */ - scan = p; - for (;; ) { - temp = regnext(scan); - if (temp == NULL) - break; - scan = temp; - } - - if (OP(scan) == BACK) - offset = (int)(scan - val); - else - offset = (int)(val - scan); - /* When the offset uses more than 16 bits it can no longer fit in the two - * bytes available. Use a global flag to avoid having to check return - * values in too many places. */ - if (offset > 0xffff) - reg_toolong = TRUE; - else { - *(scan + 1) = (char_u) (((unsigned)offset >> 8) & 0377); - *(scan + 2) = (char_u) (offset & 0377); - } -} - -/* - * Like regtail, on item after a BRANCH; nop if none. - */ -static void regoptail(char_u *p, char_u *val) -{ - /* When op is neither BRANCH nor BRACE_COMPLEX0-9, it is "operandless" */ - if (p == NULL || p == JUST_CALC_SIZE - || (OP(p) != BRANCH - && (OP(p) < BRACE_COMPLEX || OP(p) > BRACE_COMPLEX + 9))) - return; - regtail(OPERAND(p), val); -} - -/* - * Functions for getting characters from the regexp input. - */ - -static int at_start; /* True when on the first character */ -static int prev_at_start; /* True when on the second character */ - -/* - * Start parsing at "str". - */ -static void initchr(char_u *str) -{ - regparse = str; - prevchr_len = 0; - curchr = prevprevchr = prevchr = nextchr = -1; - at_start = TRUE; - prev_at_start = FALSE; -} - -/* - * Save the current parse state, so that it can be restored and parsing - * starts in the same state again. - */ -static void save_parse_state(parse_state_T *ps) -{ - ps->regparse = regparse; - ps->prevchr_len = prevchr_len; - ps->curchr = curchr; - ps->prevchr = prevchr; - ps->prevprevchr = prevprevchr; - ps->nextchr = nextchr; - ps->at_start = at_start; - ps->prev_at_start = prev_at_start; - ps->regnpar = regnpar; -} - -/* - * Restore a previously saved parse state. - */ -static void restore_parse_state(parse_state_T *ps) -{ - regparse = ps->regparse; - prevchr_len = ps->prevchr_len; - curchr = ps->curchr; - prevchr = ps->prevchr; - prevprevchr = ps->prevprevchr; - nextchr = ps->nextchr; - at_start = ps->at_start; - prev_at_start = ps->prev_at_start; - regnpar = ps->regnpar; -} - - -/* - * Get the next character without advancing. - */ -static int peekchr(void) -{ - static int after_slash = FALSE; - - if (curchr == -1) { - switch (curchr = regparse[0]) { - case '.': - case '[': - case '~': - /* magic when 'magic' is on */ - if (reg_magic >= MAGIC_ON) - curchr = Magic(curchr); - break; - case '(': - case ')': - case '{': - case '%': - case '+': - case '=': - case '?': - case '@': - case '!': - case '&': - case '|': - case '<': - case '>': - case '#': /* future ext. */ - case '"': /* future ext. */ - case '\'': /* future ext. */ - case ',': /* future ext. */ - case '-': /* future ext. */ - case ':': /* future ext. */ - case ';': /* future ext. */ - case '`': /* future ext. */ - case '/': /* Can't be used in / command */ - /* magic only after "\v" */ - if (reg_magic == MAGIC_ALL) - curchr = Magic(curchr); - break; - case '*': - /* * is not magic as the very first character, eg "?*ptr", when - * after '^', eg "/^*ptr" and when after "\(", "\|", "\&". But - * "\(\*" is not magic, thus must be magic if "after_slash" */ - if (reg_magic >= MAGIC_ON - && !at_start - && !(prev_at_start && prevchr == Magic('^')) - && (after_slash - || (prevchr != Magic('(') - && prevchr != Magic('&') - && prevchr != Magic('|')))) - curchr = Magic('*'); - break; - case '^': - /* '^' is only magic as the very first character and if it's after - * "\(", "\|", "\&' or "\n" */ - if (reg_magic >= MAGIC_OFF - && (at_start - || reg_magic == MAGIC_ALL - || prevchr == Magic('(') - || prevchr == Magic('|') - || prevchr == Magic('&') - || prevchr == Magic('n') - || (no_Magic(prevchr) == '(' - && prevprevchr == Magic('%')))) { - curchr = Magic('^'); - at_start = TRUE; - prev_at_start = FALSE; - } - break; - case '$': - /* '$' is only magic as the very last char and if it's in front of - * either "\|", "\)", "\&", or "\n" */ - if (reg_magic >= MAGIC_OFF) { - char_u *p = regparse + 1; - - /* ignore \c \C \m and \M after '$' */ - while (p[0] == '\\' && (p[1] == 'c' || p[1] == 'C' - || p[1] == 'm' || p[1] == 'M' || p[1] == 'Z')) - p += 2; - if (p[0] == NUL - || (p[0] == '\\' - && (p[1] == '|' || p[1] == '&' || p[1] == ')' - || p[1] == 'n')) - || reg_magic == MAGIC_ALL) - curchr = Magic('$'); - } - break; - case '\\': - { - int c = regparse[1]; - - if (c == NUL) - curchr = '\\'; /* trailing '\' */ - else if ( - c <= '~' && META_flags[c] - ) { - /* - * META contains everything that may be magic sometimes, - * except ^ and $ ("\^" and "\$" are only magic after - * "\v"). We now fetch the next character and toggle its - * magicness. Therefore, \ is so meta-magic that it is - * not in META. - */ - curchr = -1; - prev_at_start = at_start; - at_start = FALSE; /* be able to say "/\*ptr" */ - ++regparse; - ++after_slash; - peekchr(); - --regparse; - --after_slash; - curchr = toggle_Magic(curchr); - } else if (vim_strchr(REGEXP_ABBR, c)) { - /* - * Handle abbreviations, like "\t" for TAB -- webb - */ - curchr = backslash_trans(c); - } else if (reg_magic == MAGIC_NONE && (c == '$' || c == '^')) - curchr = toggle_Magic(c); - else { - /* - * Next character can never be (made) magic? - * Then backslashing it won't do anything. - */ - if (has_mbyte) - curchr = (*mb_ptr2char)(regparse + 1); - else - curchr = c; - } - break; - } - - default: - if (has_mbyte) - curchr = (*mb_ptr2char)(regparse); - } - } - - return curchr; -} - -/* - * Eat one lexed character. Do this in a way that we can undo it. - */ -static void skipchr(void) -{ - /* peekchr() eats a backslash, do the same here */ - if (*regparse == '\\') - prevchr_len = 1; - else - prevchr_len = 0; - if (regparse[prevchr_len] != NUL) { - if (enc_utf8) - /* exclude composing chars that mb_ptr2len does include */ - prevchr_len += utf_ptr2len(regparse + prevchr_len); - else if (has_mbyte) - prevchr_len += (*mb_ptr2len)(regparse + prevchr_len); - else - ++prevchr_len; - } - regparse += prevchr_len; - prev_at_start = at_start; - at_start = FALSE; - prevprevchr = prevchr; - prevchr = curchr; - curchr = nextchr; /* use previously unget char, or -1 */ - nextchr = -1; -} - -/* - * Skip a character while keeping the value of prev_at_start for at_start. - * prevchr and prevprevchr are also kept. - */ -static void skipchr_keepstart(void) -{ - int as = prev_at_start; - int pr = prevchr; - int prpr = prevprevchr; - - skipchr(); - at_start = as; - prevchr = pr; - prevprevchr = prpr; -} - -/* - * Get the next character from the pattern. We know about magic and such, so - * therefore we need a lexical analyzer. - */ -static int getchr(void) -{ - int chr = peekchr(); - - skipchr(); - return chr; -} - -/* - * put character back. Works only once! - */ -static void ungetchr(void) -{ - nextchr = curchr; - curchr = prevchr; - prevchr = prevprevchr; - at_start = prev_at_start; - prev_at_start = FALSE; - - /* Backup regparse, so that it's at the same position as before the - * getchr(). */ - regparse -= prevchr_len; -} - -/* - * Get and return the value of the hex string at the current position. - * Return -1 if there is no valid hex number. - * The position is updated: - * blahblah\%x20asdf - * before-^ ^-after - * The parameter controls the maximum number of input characters. This will be - * 2 when reading a \%x20 sequence and 4 when reading a \%u20AC sequence. - */ -static int gethexchrs(int maxinputlen) -{ - int nr = 0; - int c; - int i; - - for (i = 0; i < maxinputlen; ++i) { - c = regparse[0]; - if (!vim_isxdigit(c)) - break; - nr <<= 4; - nr |= hex2nr(c); - ++regparse; - } - - if (i == 0) - return -1; - return nr; -} - -/* - * Get and return the value of the decimal string immediately after the - * current position. Return -1 for invalid. Consumes all digits. - */ -static int getdecchrs(void) -{ - int nr = 0; - int c; - int i; - - for (i = 0;; ++i) { - c = regparse[0]; - if (c < '0' || c > '9') - break; - nr *= 10; - nr += c - '0'; - ++regparse; - curchr = -1; /* no longer valid */ - } - - if (i == 0) - return -1; - return nr; -} - -/* - * get and return the value of the octal string immediately after the current - * position. Return -1 for invalid, or 0-255 for valid. Smart enough to handle - * numbers > 377 correctly (for example, 400 is treated as 40) and doesn't - * treat 8 or 9 as recognised characters. Position is updated: - * blahblah\%o210asdf - * before-^ ^-after - */ -static int getoctchrs(void) -{ - int nr = 0; - int c; - int i; - - for (i = 0; i < 3 && nr < 040; ++i) { - c = regparse[0]; - if (c < '0' || c > '7') - break; - nr <<= 3; - nr |= hex2nr(c); - ++regparse; - } - - if (i == 0) - return -1; - return nr; -} - -/* - * Get a number after a backslash that is inside []. - * When nothing is recognized return a backslash. - */ -static int coll_get_char(void) -{ - int nr = -1; - - switch (*regparse++) { - case 'd': nr = getdecchrs(); break; - case 'o': nr = getoctchrs(); break; - case 'x': nr = gethexchrs(2); break; - case 'u': nr = gethexchrs(4); break; - case 'U': nr = gethexchrs(8); break; - } - if (nr < 0) { - /* If getting the number fails be backwards compatible: the character - * is a backslash. */ - --regparse; - nr = '\\'; - } - return nr; -} - -/* - * read_limits - Read two integers to be taken as a minimum and maximum. - * If the first character is '-', then the range is reversed. - * Should end with 'end'. If minval is missing, zero is default, if maxval is - * missing, a very big number is the default. - */ -static int read_limits(long *minval, long *maxval) -{ - int reverse = FALSE; - char_u *first_char; - long tmp; - - if (*regparse == '-') { - /* Starts with '-', so reverse the range later */ - regparse++; - reverse = TRUE; - } - first_char = regparse; - *minval = getdigits(®parse); - if (*regparse == ',') { /* There is a comma */ - if (vim_isdigit(*++regparse)) - *maxval = getdigits(®parse); - else - *maxval = MAX_LIMIT; - } else if (VIM_ISDIGIT(*first_char)) - *maxval = *minval; /* It was \{n} or \{-n} */ - else - *maxval = MAX_LIMIT; /* It was \{} or \{-} */ - if (*regparse == '\\') - regparse++; /* Allow either \{...} or \{...\} */ - if (*regparse != '}') { - sprintf((char *)IObuff, _("E554: Syntax error in %s{...}"), - reg_magic == MAGIC_ALL ? "" : "\\"); - EMSG_RET_FAIL(IObuff); - } - - /* - * Reverse the range if there was a '-', or make sure it is in the right - * order otherwise. - */ - if ((!reverse && *minval > *maxval) || (reverse && *minval < *maxval)) { - tmp = *minval; - *minval = *maxval; - *maxval = tmp; - } - skipchr(); /* let's be friends with the lexer again */ - return OK; -} - -/* - * vim_regexec and friends - */ - -/* - * Global work variables for vim_regexec(). - */ - -/* The current match-position is remembered with these variables: */ -static linenr_T reglnum; /* line number, relative to first line */ -static char_u *regline; /* start of current line */ -static char_u *reginput; /* current input, points into "regline" */ - -static int need_clear_subexpr; /* subexpressions still need to be - * cleared */ -static int need_clear_zsubexpr = FALSE; /* extmatch subexpressions - * still need to be cleared */ - -/* - * Structure used to save the current input state, when it needs to be - * restored after trying a match. Used by reg_save() and reg_restore(). - * Also stores the length of "backpos". - */ -typedef struct { - union { - char_u *ptr; /* reginput pointer, for single-line regexp */ - lpos_T pos; /* reginput pos, for multi-line regexp */ - } rs_u; - int rs_len; -} regsave_T; - -/* struct to save start/end pointer/position in for \(\) */ -typedef struct { - union { - char_u *ptr; - lpos_T pos; - } se_u; -} save_se_T; - -/* used for BEHIND and NOBEHIND matching */ -typedef struct regbehind_S { - regsave_T save_after; - regsave_T save_behind; - int save_need_clear_subexpr; - save_se_T save_start[NSUBEXP]; - save_se_T save_end[NSUBEXP]; -} regbehind_T; - -static char_u *reg_getline(linenr_T lnum); -static long bt_regexec_both(char_u *line, colnr_T col, proftime_T *tm); -static long regtry(bt_regprog_T *prog, colnr_T col); -static void cleanup_subexpr(void); -static void cleanup_zsubexpr(void); -static void save_subexpr(regbehind_T *bp); -static void restore_subexpr(regbehind_T *bp); -static void reg_nextline(void); -static void reg_save(regsave_T *save, garray_T *gap); -static void reg_restore(regsave_T *save, garray_T *gap); -static int reg_save_equal(regsave_T *save); -static void save_se_multi(save_se_T *savep, lpos_T *posp); -static void save_se_one(save_se_T *savep, char_u **pp); - -/* Save the sub-expressions before attempting a match. */ -#define save_se(savep, posp, pp) \ - REG_MULTI ? save_se_multi((savep), (posp)) : save_se_one((savep), (pp)) - -/* After a failed match restore the sub-expressions. */ -#define restore_se(savep, posp, pp) { \ - if (REG_MULTI) \ - *(posp) = (savep)->se_u.pos; \ - else \ - *(pp) = (savep)->se_u.ptr; } - -static int re_num_cmp(long_u val, char_u *scan); -static int match_with_backref(linenr_T start_lnum, colnr_T start_col, - linenr_T end_lnum, colnr_T end_col, - int *bytelen); -static int regmatch(char_u *prog); -static int regrepeat(char_u *p, long maxcount); - -#ifdef REGEXP_DEBUG -int regnarrate = 0; -#endif - -/* - * Internal copy of 'ignorecase'. It is set at each call to vim_regexec(). - * Normally it gets the value of "rm_ic" or "rmm_ic", but when the pattern - * contains '\c' or '\C' the value is overruled. - */ -static int ireg_ic; - -/* - * Similar to ireg_ic, but only for 'combining' characters. Set with \Z flag - * in the regexp. Defaults to false, always. - */ -static int ireg_icombine; - -/* - * Copy of "rmm_maxcol": maximum column to search for a match. Zero when - * there is no maximum. - */ -static colnr_T ireg_maxcol; - -/* - * Sometimes need to save a copy of a line. Since alloc()/free() is very - * slow, we keep one allocated piece of memory and only re-allocate it when - * it's too small. It's freed in bt_regexec_both() when finished. - */ -static char_u *reg_tofree = NULL; -static unsigned reg_tofreelen; - -/* - * These variables are set when executing a regexp to speed up the execution. - * Which ones are set depends on whether a single-line or multi-line match is - * done: - * single-line multi-line - * reg_match ®match_T NULL - * reg_mmatch NULL ®mmatch_T - * reg_startp reg_match->startp <invalid> - * reg_endp reg_match->endp <invalid> - * reg_startpos <invalid> reg_mmatch->startpos - * reg_endpos <invalid> reg_mmatch->endpos - * reg_win NULL window in which to search - * reg_buf curbuf buffer in which to search - * reg_firstlnum <invalid> first line in which to search - * reg_maxline 0 last line nr - * reg_line_lbr FALSE or TRUE FALSE - */ -static regmatch_T *reg_match; -static regmmatch_T *reg_mmatch; -static char_u **reg_startp = NULL; -static char_u **reg_endp = NULL; -static lpos_T *reg_startpos = NULL; -static lpos_T *reg_endpos = NULL; -static win_T *reg_win; -static buf_T *reg_buf; -static linenr_T reg_firstlnum; -static linenr_T reg_maxline; -static int reg_line_lbr; /* "\n" in string is line break */ - -/* Values for rs_state in regitem_T. */ -typedef enum regstate_E { - RS_NOPEN = 0 /* NOPEN and NCLOSE */ - , RS_MOPEN /* MOPEN + [0-9] */ - , RS_MCLOSE /* MCLOSE + [0-9] */ - , RS_ZOPEN /* ZOPEN + [0-9] */ - , RS_ZCLOSE /* ZCLOSE + [0-9] */ - , RS_BRANCH /* BRANCH */ - , RS_BRCPLX_MORE /* BRACE_COMPLEX and trying one more match */ - , RS_BRCPLX_LONG /* BRACE_COMPLEX and trying longest match */ - , RS_BRCPLX_SHORT /* BRACE_COMPLEX and trying shortest match */ - , RS_NOMATCH /* NOMATCH */ - , RS_BEHIND1 /* BEHIND / NOBEHIND matching rest */ - , RS_BEHIND2 /* BEHIND / NOBEHIND matching behind part */ - , RS_STAR_LONG /* STAR/PLUS/BRACE_SIMPLE longest match */ - , RS_STAR_SHORT /* STAR/PLUS/BRACE_SIMPLE shortest match */ -} regstate_T; - -/* - * When there are alternatives a regstate_T is put on the regstack to remember - * what we are doing. - * Before it may be another type of item, depending on rs_state, to remember - * more things. - */ -typedef struct regitem_S { - regstate_T rs_state; /* what we are doing, one of RS_ above */ - char_u *rs_scan; /* current node in program */ - union { - save_se_T sesave; - regsave_T regsave; - } rs_un; /* room for saving reginput */ - short rs_no; /* submatch nr or BEHIND/NOBEHIND */ -} regitem_T; - -static regitem_T *regstack_push(regstate_T state, char_u *scan); -static void regstack_pop(char_u **scan); - -/* used for STAR, PLUS and BRACE_SIMPLE matching */ -typedef struct regstar_S { - int nextb; /* next byte */ - int nextb_ic; /* next byte reverse case */ - long count; - long minval; - long maxval; -} regstar_T; - -/* used to store input position when a BACK was encountered, so that we now if - * we made any progress since the last time. */ -typedef struct backpos_S { - char_u *bp_scan; /* "scan" where BACK was encountered */ - regsave_T bp_pos; /* last input position */ -} backpos_T; - -/* - * "regstack" and "backpos" are used by regmatch(). They are kept over calls - * to avoid invoking malloc() and free() often. - * "regstack" is a stack with regitem_T items, sometimes preceded by regstar_T - * or regbehind_T. - * "backpos_T" is a table with backpos_T for BACK - */ -static garray_T regstack = {0, 0, 0, 0, NULL}; -static garray_T backpos = {0, 0, 0, 0, NULL}; - -/* - * Both for regstack and backpos tables we use the following strategy of - * allocation (to reduce malloc/free calls): - * - Initial size is fairly small. - * - When needed, the tables are grown bigger (8 times at first, double after - * that). - * - After executing the match we free the memory only if the array has grown. - * Thus the memory is kept allocated when it's at the initial size. - * This makes it fast while not keeping a lot of memory allocated. - * A three times speed increase was observed when using many simple patterns. - */ -#define REGSTACK_INITIAL 2048 -#define BACKPOS_INITIAL 64 - -#if defined(EXITFREE) || defined(PROTO) -void free_regexp_stuff(void) -{ - ga_clear(®stack); - ga_clear(&backpos); - free(reg_tofree); - free(reg_prev_sub); -} - -#endif - -/* - * Get pointer to the line "lnum", which is relative to "reg_firstlnum". - */ -static char_u *reg_getline(linenr_T lnum) -{ - /* when looking behind for a match/no-match lnum is negative. But we - * can't go before line 1 */ - if (reg_firstlnum + lnum < 1) - return NULL; - if (lnum > reg_maxline) - /* Must have matched the "\n" in the last line. */ - return (char_u *)""; - return ml_get_buf(reg_buf, reg_firstlnum + lnum, FALSE); -} - -static regsave_T behind_pos; - -static char_u *reg_startzp[NSUBEXP]; /* Workspace to mark beginning */ -static char_u *reg_endzp[NSUBEXP]; /* and end of \z(...\) matches */ -static lpos_T reg_startzpos[NSUBEXP]; /* idem, beginning pos */ -static lpos_T reg_endzpos[NSUBEXP]; /* idem, end pos */ - -/* TRUE if using multi-line regexp. */ -#define REG_MULTI (reg_match == NULL) - -static int bt_regexec_nl(regmatch_T *rmp, char_u *line, colnr_T col, bool line_lbr); - -/* - * Match a regexp against a string. - * "rmp->regprog" is a compiled regexp as returned by vim_regcomp(). - * Uses curbuf for line count and 'iskeyword'. - * If "line_lbr" is true, consider a "\n" in "line" to be a line break. - * - * Return TRUE if there is a match, FALSE if not. - */ -static int -bt_regexec_nl ( - regmatch_T *rmp, - char_u *line, /* string to match against */ - colnr_T col, /* column to start looking for match */ - bool line_lbr -) -{ - reg_match = rmp; - reg_mmatch = NULL; - reg_maxline = 0; - reg_line_lbr = line_lbr; - reg_buf = curbuf; - reg_win = NULL; - ireg_ic = rmp->rm_ic; - ireg_icombine = FALSE; - ireg_maxcol = 0; - return bt_regexec_both(line, col, NULL) != 0; -} - -static long bt_regexec_multi(regmmatch_T *rmp, win_T *win, buf_T *buf, - linenr_T lnum, colnr_T col, - proftime_T *tm); - -/* - * Match a regexp against multiple lines. - * "rmp->regprog" is a compiled regexp as returned by vim_regcomp(). - * Uses curbuf for line count and 'iskeyword'. - * - * Return zero if there is no match. Return number of lines contained in the - * match otherwise. - */ -static long bt_regexec_multi(rmp, win, buf, lnum, col, tm) -regmmatch_T *rmp; -win_T *win; /* window in which to search or NULL */ -buf_T *buf; /* buffer in which to search */ -linenr_T lnum; /* nr of line to start looking for match */ -colnr_T col; /* column to start looking for match */ -proftime_T *tm; /* timeout limit or NULL */ -{ - long r; - - reg_match = NULL; - reg_mmatch = rmp; - reg_buf = buf; - reg_win = win; - reg_firstlnum = lnum; - reg_maxline = reg_buf->b_ml.ml_line_count - lnum; - reg_line_lbr = FALSE; - ireg_ic = rmp->rmm_ic; - ireg_icombine = FALSE; - ireg_maxcol = rmp->rmm_maxcol; - - r = bt_regexec_both(NULL, col, tm); - - return r; -} - -/* - * Match a regexp against a string ("line" points to the string) or multiple - * lines ("line" is NULL, use reg_getline()). - */ -static long bt_regexec_both(line, col, tm) -char_u *line; -colnr_T col; /* column to start looking for match */ -proftime_T *tm; /* timeout limit or NULL */ -{ - bt_regprog_T *prog; - char_u *s; - long retval = 0L; - - /* Create "regstack" and "backpos" if they are not allocated yet. - * We allocate *_INITIAL amount of bytes first and then set the grow size - * to much bigger value to avoid many malloc calls in case of deep regular - * expressions. */ - if (regstack.ga_data == NULL) { - /* Use an item size of 1 byte, since we push different things - * onto the regstack. */ - ga_init(®stack, 1, REGSTACK_INITIAL); - ga_grow(®stack, REGSTACK_INITIAL); - regstack.ga_growsize = REGSTACK_INITIAL * 8; - } - - if (backpos.ga_data == NULL) { - ga_init(&backpos, sizeof(backpos_T), BACKPOS_INITIAL); - ga_grow(&backpos, BACKPOS_INITIAL); - backpos.ga_growsize = BACKPOS_INITIAL * 8; - } - - if (REG_MULTI) { - prog = (bt_regprog_T *)reg_mmatch->regprog; - line = reg_getline((linenr_T)0); - reg_startpos = reg_mmatch->startpos; - reg_endpos = reg_mmatch->endpos; - } else { - prog = (bt_regprog_T *)reg_match->regprog; - reg_startp = reg_match->startp; - reg_endp = reg_match->endp; - } - - /* Be paranoid... */ - if (prog == NULL || line == NULL) { - EMSG(_(e_null)); - goto theend; - } - - /* Check validity of program. */ - if (prog_magic_wrong()) - goto theend; - - /* If the start column is past the maximum column: no need to try. */ - if (ireg_maxcol > 0 && col >= ireg_maxcol) - goto theend; - - /* If pattern contains "\c" or "\C": overrule value of ireg_ic */ - if (prog->regflags & RF_ICASE) - ireg_ic = TRUE; - else if (prog->regflags & RF_NOICASE) - ireg_ic = FALSE; - - /* If pattern contains "\Z" overrule value of ireg_icombine */ - if (prog->regflags & RF_ICOMBINE) - ireg_icombine = TRUE; - - /* If there is a "must appear" string, look for it. */ - if (prog->regmust != NULL) { - int c; - - if (has_mbyte) - c = (*mb_ptr2char)(prog->regmust); - else - c = *prog->regmust; - s = line + col; - - /* - * This is used very often, esp. for ":global". Use three versions of - * the loop to avoid overhead of conditions. - */ - if (!ireg_ic - && !has_mbyte - ) - while ((s = vim_strbyte(s, c)) != NULL) { - if (cstrncmp(s, prog->regmust, &prog->regmlen) == 0) - break; /* Found it. */ - ++s; - } - else if (!ireg_ic || (!enc_utf8 && mb_char2len(c) > 1)) - while ((s = vim_strchr(s, c)) != NULL) { - if (cstrncmp(s, prog->regmust, &prog->regmlen) == 0) - break; /* Found it. */ - mb_ptr_adv(s); - } - else - while ((s = cstrchr(s, c)) != NULL) { - if (cstrncmp(s, prog->regmust, &prog->regmlen) == 0) - break; /* Found it. */ - mb_ptr_adv(s); - } - if (s == NULL) /* Not present. */ - goto theend; - } - - regline = line; - reglnum = 0; - reg_toolong = FALSE; - - /* Simplest case: Anchored match need be tried only once. */ - if (prog->reganch) { - int c; - - if (has_mbyte) - c = (*mb_ptr2char)(regline + col); - else - c = regline[col]; - if (prog->regstart == NUL - || prog->regstart == c - || (ireg_ic && (( - (enc_utf8 && utf_fold(prog->regstart) == utf_fold(c))) - || (c < 255 && prog->regstart < 255 && - vim_tolower(prog->regstart) == vim_tolower(c))))) - retval = regtry(prog, col); - else - retval = 0; - } else { - int tm_count = 0; - /* Messy cases: unanchored match. */ - while (!got_int) { - if (prog->regstart != NUL) { - /* Skip until the char we know it must start with. - * Used often, do some work to avoid call overhead. */ - if (!ireg_ic - && !has_mbyte - ) - s = vim_strbyte(regline + col, prog->regstart); - else - s = cstrchr(regline + col, prog->regstart); - if (s == NULL) { - retval = 0; - break; - } - col = (int)(s - regline); - } - - /* Check for maximum column to try. */ - if (ireg_maxcol > 0 && col >= ireg_maxcol) { - retval = 0; - break; - } - - retval = regtry(prog, col); - if (retval > 0) - break; - - /* if not currently on the first line, get it again */ - if (reglnum != 0) { - reglnum = 0; - regline = reg_getline((linenr_T)0); - } - if (regline[col] == NUL) - break; - if (has_mbyte) - col += (*mb_ptr2len)(regline + col); - else - ++col; - /* Check for timeout once in a twenty times to avoid overhead. */ - if (tm != NULL && ++tm_count == 20) { - tm_count = 0; - if (profile_passed_limit(tm)) - break; - } - } - } - -theend: - /* Free "reg_tofree" when it's a bit big. - * Free regstack and backpos if they are bigger than their initial size. */ - if (reg_tofreelen > 400) { - free(reg_tofree); - reg_tofree = NULL; - } - if (regstack.ga_maxlen > REGSTACK_INITIAL) - ga_clear(®stack); - if (backpos.ga_maxlen > BACKPOS_INITIAL) - ga_clear(&backpos); - - return retval; -} - -static reg_extmatch_T *make_extmatch(void); - -/* - * Create a new extmatch and mark it as referenced once. - */ -static reg_extmatch_T *make_extmatch(void) -{ - reg_extmatch_T *em = xcalloc(1, sizeof(reg_extmatch_T)); - em->refcnt = 1; - return em; -} - -/* - * Add a reference to an extmatch. - */ -reg_extmatch_T *ref_extmatch(reg_extmatch_T *em) -{ - if (em != NULL) - em->refcnt++; - return em; -} - -/* - * Remove a reference to an extmatch. If there are no references left, free - * the info. - */ -void unref_extmatch(reg_extmatch_T *em) -{ - int i; - - if (em != NULL && --em->refcnt <= 0) { - for (i = 0; i < NSUBEXP; ++i) - free(em->matches[i]); - free(em); - } -} - -/* - * regtry - try match of "prog" with at regline["col"]. - * Returns 0 for failure, number of lines contained in the match otherwise. - */ -static long regtry(bt_regprog_T *prog, colnr_T col) -{ - reginput = regline + col; - need_clear_subexpr = TRUE; - /* Clear the external match subpointers if necessary. */ - if (prog->reghasz == REX_SET) - need_clear_zsubexpr = TRUE; - - if (regmatch(prog->program + 1) == 0) - return 0; - - cleanup_subexpr(); - if (REG_MULTI) { - if (reg_startpos[0].lnum < 0) { - reg_startpos[0].lnum = 0; - reg_startpos[0].col = col; - } - if (reg_endpos[0].lnum < 0) { - reg_endpos[0].lnum = reglnum; - reg_endpos[0].col = (int)(reginput - regline); - } else - /* Use line number of "\ze". */ - reglnum = reg_endpos[0].lnum; - } else { - if (reg_startp[0] == NULL) - reg_startp[0] = regline + col; - if (reg_endp[0] == NULL) - reg_endp[0] = reginput; - } - /* Package any found \z(...\) matches for export. Default is none. */ - unref_extmatch(re_extmatch_out); - re_extmatch_out = NULL; - - if (prog->reghasz == REX_SET) { - int i; - - cleanup_zsubexpr(); - re_extmatch_out = make_extmatch(); - for (i = 0; i < NSUBEXP; i++) { - if (REG_MULTI) { - /* Only accept single line matches. */ - if (reg_startzpos[i].lnum >= 0 - && reg_endzpos[i].lnum == reg_startzpos[i].lnum - && reg_endzpos[i].col >= reg_startzpos[i].col) { - re_extmatch_out->matches[i] = - vim_strnsave(reg_getline(reg_startzpos[i].lnum) - + reg_startzpos[i].col, - reg_endzpos[i].col - - reg_startzpos[i].col); - } - } else { - if (reg_startzp[i] != NULL && reg_endzp[i] != NULL) - re_extmatch_out->matches[i] = - vim_strnsave(reg_startzp[i], - (int)(reg_endzp[i] - reg_startzp[i])); - } - } - } - return 1 + reglnum; -} - -static int reg_prev_class(void); - -/* - * Get class of previous character. - */ -static int reg_prev_class(void) -{ - if (reginput > regline) - return mb_get_class_buf(reginput - 1 - - (*mb_head_off)(regline, reginput - 1), reg_buf); - return -1; -} - -static int reg_match_visual(void); - -/* - * Return TRUE if the current reginput position matches the Visual area. - */ -static int reg_match_visual(void) -{ - pos_T top, bot; - linenr_T lnum; - colnr_T col; - win_T *wp = reg_win == NULL ? curwin : reg_win; - int mode; - colnr_T start, end; - colnr_T start2, end2; - colnr_T cols; - - /* Check if the buffer is the current buffer. */ - if (reg_buf != curbuf || VIsual.lnum == 0) - return FALSE; - - if (VIsual_active) { - if (lt(VIsual, wp->w_cursor)) { - top = VIsual; - bot = wp->w_cursor; - } else { - top = wp->w_cursor; - bot = VIsual; - } - mode = VIsual_mode; - } else { - if (lt(curbuf->b_visual.vi_start, curbuf->b_visual.vi_end)) { - top = curbuf->b_visual.vi_start; - bot = curbuf->b_visual.vi_end; - } else { - top = curbuf->b_visual.vi_end; - bot = curbuf->b_visual.vi_start; - } - mode = curbuf->b_visual.vi_mode; - } - lnum = reglnum + reg_firstlnum; - if (lnum < top.lnum || lnum > bot.lnum) - return FALSE; - - if (mode == 'v') { - col = (colnr_T)(reginput - regline); - if ((lnum == top.lnum && col < top.col) - || (lnum == bot.lnum && col >= bot.col + (*p_sel != 'e'))) - return FALSE; - } else if (mode == Ctrl_V) { - getvvcol(wp, &top, &start, NULL, &end); - getvvcol(wp, &bot, &start2, NULL, &end2); - if (start2 < start) - start = start2; - if (end2 > end) - end = end2; - if (top.col == MAXCOL || bot.col == MAXCOL) - end = MAXCOL; - cols = win_linetabsize(wp, regline, (colnr_T)(reginput - regline)); - if (cols < start || cols > end - (*p_sel == 'e')) - return FALSE; - } - return TRUE; -} - -#define ADVANCE_REGINPUT() mb_ptr_adv(reginput) - -/* - * The arguments from BRACE_LIMITS are stored here. They are actually local - * to regmatch(), but they are here to reduce the amount of stack space used - * (it can be called recursively many times). - */ -static long bl_minval; -static long bl_maxval; - -/* - * regmatch - main matching routine - * - * Conceptually the strategy is simple: Check to see whether the current node - * matches, push an item onto the regstack and loop to see whether the rest - * matches, and then act accordingly. In practice we make some effort to - * avoid using the regstack, in particular by going through "ordinary" nodes - * (that don't need to know whether the rest of the match failed) by a nested - * loop. - * - * Returns TRUE when there is a match. Leaves reginput and reglnum just after - * the last matched character. - * Returns FALSE when there is no match. Leaves reginput and reglnum in an - * undefined state! - */ -static int -regmatch ( - char_u *scan /* Current node. */ -) -{ - char_u *next; /* Next node. */ - int op; - int c; - regitem_T *rp; - int no; - int status; /* one of the RA_ values: */ -#define RA_FAIL 1 /* something failed, abort */ -#define RA_CONT 2 /* continue in inner loop */ -#define RA_BREAK 3 /* break inner loop */ -#define RA_MATCH 4 /* successful match */ -#define RA_NOMATCH 5 /* didn't match */ - - /* Make "regstack" and "backpos" empty. They are allocated and freed in - * bt_regexec_both() to reduce malloc()/free() calls. */ - regstack.ga_len = 0; - backpos.ga_len = 0; - - /* - * Repeat until "regstack" is empty. - */ - for (;; ) { - /* Some patterns may take a long time to match, e.g., "\([a-z]\+\)\+Q". - * Allow interrupting them with CTRL-C. */ - fast_breakcheck(); - -#ifdef REGEXP_DEBUG - if (scan != NULL && regnarrate) { - mch_errmsg((char *)regprop(scan)); - mch_errmsg("(\n"); - } -#endif - - /* - * Repeat for items that can be matched sequentially, without using the - * regstack. - */ - for (;; ) { - if (got_int || scan == NULL) { - status = RA_FAIL; - break; - } - status = RA_CONT; - -#ifdef REGEXP_DEBUG - if (regnarrate) { - mch_errmsg((char *)regprop(scan)); - mch_errmsg("...\n"); - if (re_extmatch_in != NULL) { - int i; - - mch_errmsg(_("External submatches:\n")); - for (i = 0; i < NSUBEXP; i++) { - mch_errmsg(" \""); - if (re_extmatch_in->matches[i] != NULL) - mch_errmsg((char *)re_extmatch_in->matches[i]); - mch_errmsg("\"\n"); - } - } - } -#endif - next = regnext(scan); - - op = OP(scan); - /* Check for character class with NL added. */ - if (!reg_line_lbr && WITH_NL(op) && REG_MULTI - && *reginput == NUL && reglnum <= reg_maxline) { - reg_nextline(); - } else if (reg_line_lbr && WITH_NL(op) && *reginput == '\n') { - ADVANCE_REGINPUT(); - } else { - if (WITH_NL(op)) - op -= ADD_NL; - if (has_mbyte) - c = (*mb_ptr2char)(reginput); - else - c = *reginput; - switch (op) { - case BOL: - if (reginput != regline) - status = RA_NOMATCH; - break; - - case EOL: - if (c != NUL) - status = RA_NOMATCH; - break; - - case RE_BOF: - /* We're not at the beginning of the file when below the first - * line where we started, not at the start of the line or we - * didn't start at the first line of the buffer. */ - if (reglnum != 0 || reginput != regline - || (REG_MULTI && reg_firstlnum > 1)) - status = RA_NOMATCH; - break; - - case RE_EOF: - if (reglnum != reg_maxline || c != NUL) - status = RA_NOMATCH; - break; - - case CURSOR: - /* Check if the buffer is in a window and compare the - * reg_win->w_cursor position to the match position. */ - if (reg_win == NULL - || (reglnum + reg_firstlnum != reg_win->w_cursor.lnum) - || ((colnr_T)(reginput - regline) != reg_win->w_cursor.col)) - status = RA_NOMATCH; - break; - - case RE_MARK: - /* Compare the mark position to the match position. */ - { - int mark = OPERAND(scan)[0]; - int cmp = OPERAND(scan)[1]; - pos_T *pos; - - pos = getmark_buf(reg_buf, mark, FALSE); - if (pos == NULL /* mark doesn't exist */ - || pos->lnum <= 0 /* mark isn't set in reg_buf */ - || (pos->lnum == reglnum + reg_firstlnum - ? (pos->col == (colnr_T)(reginput - regline) - ? (cmp == '<' || cmp == '>') - : (pos->col < (colnr_T)(reginput - regline) - ? cmp != '>' - : cmp != '<')) - : (pos->lnum < reglnum + reg_firstlnum - ? cmp != '>' - : cmp != '<'))) - status = RA_NOMATCH; - } - break; - - case RE_VISUAL: - if (!reg_match_visual()) - status = RA_NOMATCH; - break; - - case RE_LNUM: - if (!REG_MULTI || !re_num_cmp((long_u)(reglnum + reg_firstlnum), - scan)) - status = RA_NOMATCH; - break; - - case RE_COL: - if (!re_num_cmp((long_u)(reginput - regline) + 1, scan)) - status = RA_NOMATCH; - break; - - case RE_VCOL: - if (!re_num_cmp((long_u)win_linetabsize( - reg_win == NULL ? curwin : reg_win, - regline, (colnr_T)(reginput - regline)) + 1, scan)) - status = RA_NOMATCH; - break; - - case BOW: /* \<word; reginput points to w */ - if (c == NUL) /* Can't match at end of line */ - status = RA_NOMATCH; - else if (has_mbyte) { - int this_class; - - /* Get class of current and previous char (if it exists). */ - this_class = mb_get_class_buf(reginput, reg_buf); - if (this_class <= 1) - status = RA_NOMATCH; /* not on a word at all */ - else if (reg_prev_class() == this_class) - status = RA_NOMATCH; /* previous char is in same word */ - } else { - if (!vim_iswordc_buf(c, reg_buf) || (reginput > regline - && vim_iswordc_buf(reginput[-1 - ], reg_buf))) - status = RA_NOMATCH; - } - break; - - case EOW: /* word\>; reginput points after d */ - if (reginput == regline) /* Can't match at start of line */ - status = RA_NOMATCH; - else if (has_mbyte) { - int this_class, prev_class; - - /* Get class of current and previous char (if it exists). */ - this_class = mb_get_class_buf(reginput, reg_buf); - prev_class = reg_prev_class(); - if (this_class == prev_class - || prev_class == 0 || prev_class == 1) - status = RA_NOMATCH; - } else { - if (!vim_iswordc_buf(reginput[-1], reg_buf) - || (reginput[0] != NUL && vim_iswordc_buf(c, reg_buf))) - status = RA_NOMATCH; - } - break; /* Matched with EOW */ - - case ANY: - /* ANY does not match new lines. */ - if (c == NUL) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case IDENT: - if (!vim_isIDc(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case SIDENT: - if (VIM_ISDIGIT(*reginput) || !vim_isIDc(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case KWORD: - if (!vim_iswordp_buf(reginput, reg_buf)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case SKWORD: - if (VIM_ISDIGIT(*reginput) || !vim_iswordp_buf(reginput, reg_buf)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case FNAME: - if (!vim_isfilec(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case SFNAME: - if (VIM_ISDIGIT(*reginput) || !vim_isfilec(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case PRINT: - if (!vim_isprintc(PTR2CHAR(reginput))) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case SPRINT: - if (VIM_ISDIGIT(*reginput) || !vim_isprintc(PTR2CHAR(reginput))) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case WHITE: - if (!vim_iswhite(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NWHITE: - if (c == NUL || vim_iswhite(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case DIGIT: - if (!ri_digit(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NDIGIT: - if (c == NUL || ri_digit(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case HEX: - if (!ri_hex(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NHEX: - if (c == NUL || ri_hex(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case OCTAL: - if (!ri_octal(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NOCTAL: - if (c == NUL || ri_octal(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case WORD: - if (!ri_word(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NWORD: - if (c == NUL || ri_word(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case HEAD: - if (!ri_head(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NHEAD: - if (c == NUL || ri_head(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case ALPHA: - if (!ri_alpha(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NALPHA: - if (c == NUL || ri_alpha(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case LOWER: - if (!ri_lower(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NLOWER: - if (c == NUL || ri_lower(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case UPPER: - if (!ri_upper(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case NUPPER: - if (c == NUL || ri_upper(c)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case EXACTLY: - { - int len; - char_u *opnd; - - opnd = OPERAND(scan); - /* Inline the first byte, for speed. */ - if (*opnd != *reginput - && (!ireg_ic || ( - !enc_utf8 && - vim_tolower(*opnd) != vim_tolower(*reginput)))) - status = RA_NOMATCH; - else if (*opnd == NUL) { - /* match empty string always works; happens when "~" is - * empty. */ - } else if (opnd[1] == NUL - && !(enc_utf8 && ireg_ic) - ) - ++reginput; /* matched a single char */ - else { - len = (int)STRLEN(opnd); - /* Need to match first byte again for multi-byte. */ - if (cstrncmp(opnd, reginput, &len) != 0) - status = RA_NOMATCH; - /* Check for following composing character. */ - else if (enc_utf8 - && UTF_COMPOSINGLIKE(reginput, reginput + len)) { - /* raaron: This code makes a composing character get - * ignored, which is the correct behavior (sometimes) - * for voweled Hebrew texts. */ - if (!ireg_icombine) - status = RA_NOMATCH; - } else - reginput += len; - } - } - break; - - case ANYOF: - case ANYBUT: - if (c == NUL) - status = RA_NOMATCH; - else if ((cstrchr(OPERAND(scan), c) == NULL) == (op == ANYOF)) - status = RA_NOMATCH; - else - ADVANCE_REGINPUT(); - break; - - case MULTIBYTECODE: - if (has_mbyte) { - int i, len; - char_u *opnd; - int opndc = 0, inpc; - - opnd = OPERAND(scan); - /* Safety check (just in case 'encoding' was changed since - * compiling the program). */ - if ((len = (*mb_ptr2len)(opnd)) < 2) { - status = RA_NOMATCH; - break; - } - if (enc_utf8) - opndc = mb_ptr2char(opnd); - if (enc_utf8 && utf_iscomposing(opndc)) { - /* When only a composing char is given match at any - * position where that composing char appears. */ - status = RA_NOMATCH; - for (i = 0; reginput[i] != NUL; i += utf_char2len(inpc)) { - inpc = mb_ptr2char(reginput + i); - if (!utf_iscomposing(inpc)) { - if (i > 0) - break; - } else if (opndc == inpc) { - /* Include all following composing chars. */ - len = i + mb_ptr2len(reginput + i); - status = RA_MATCH; - break; - } - } - } else - for (i = 0; i < len; ++i) - if (opnd[i] != reginput[i]) { - status = RA_NOMATCH; - break; - } - reginput += len; - } else - status = RA_NOMATCH; - break; - - case NOTHING: - break; - - case BACK: - { - int i; - backpos_T *bp; - - /* - * When we run into BACK we need to check if we don't keep - * looping without matching any input. The second and later - * times a BACK is encountered it fails if the input is still - * at the same position as the previous time. - * The positions are stored in "backpos" and found by the - * current value of "scan", the position in the RE program. - */ - bp = (backpos_T *)backpos.ga_data; - for (i = 0; i < backpos.ga_len; ++i) - if (bp[i].bp_scan == scan) - break; - if (i == backpos.ga_len) { - /* First time at this BACK, make room to store the pos. */ - ga_grow(&backpos, 1); - /* get "ga_data" again, it may have changed */ - bp = (backpos_T *)backpos.ga_data; - bp[i].bp_scan = scan; - ++backpos.ga_len; - } else if (reg_save_equal(&bp[i].bp_pos)) - /* Still at same position as last time, fail. */ - status = RA_NOMATCH; - - if (status != RA_FAIL && status != RA_NOMATCH) - reg_save(&bp[i].bp_pos, &backpos); - } - break; - - case MOPEN + 0: /* Match start: \zs */ - case MOPEN + 1: /* \( */ - case MOPEN + 2: - case MOPEN + 3: - case MOPEN + 4: - case MOPEN + 5: - case MOPEN + 6: - case MOPEN + 7: - case MOPEN + 8: - case MOPEN + 9: - { - no = op - MOPEN; - cleanup_subexpr(); - rp = regstack_push(RS_MOPEN, scan); - if (rp == NULL) - status = RA_FAIL; - else { - rp->rs_no = no; - save_se(&rp->rs_un.sesave, ®_startpos[no], - ®_startp[no]); - /* We simply continue and handle the result when done. */ - } - } - break; - - case NOPEN: /* \%( */ - case NCLOSE: /* \) after \%( */ - if (regstack_push(RS_NOPEN, scan) == NULL) - status = RA_FAIL; - /* We simply continue and handle the result when done. */ - break; - - case ZOPEN + 1: - case ZOPEN + 2: - case ZOPEN + 3: - case ZOPEN + 4: - case ZOPEN + 5: - case ZOPEN + 6: - case ZOPEN + 7: - case ZOPEN + 8: - case ZOPEN + 9: - { - no = op - ZOPEN; - cleanup_zsubexpr(); - rp = regstack_push(RS_ZOPEN, scan); - if (rp == NULL) - status = RA_FAIL; - else { - rp->rs_no = no; - save_se(&rp->rs_un.sesave, ®_startzpos[no], - ®_startzp[no]); - /* We simply continue and handle the result when done. */ - } - } - break; - - case MCLOSE + 0: /* Match end: \ze */ - case MCLOSE + 1: /* \) */ - case MCLOSE + 2: - case MCLOSE + 3: - case MCLOSE + 4: - case MCLOSE + 5: - case MCLOSE + 6: - case MCLOSE + 7: - case MCLOSE + 8: - case MCLOSE + 9: - { - no = op - MCLOSE; - cleanup_subexpr(); - rp = regstack_push(RS_MCLOSE, scan); - if (rp == NULL) - status = RA_FAIL; - else { - rp->rs_no = no; - save_se(&rp->rs_un.sesave, ®_endpos[no], ®_endp[no]); - /* We simply continue and handle the result when done. */ - } - } - break; - - case ZCLOSE + 1: /* \) after \z( */ - case ZCLOSE + 2: - case ZCLOSE + 3: - case ZCLOSE + 4: - case ZCLOSE + 5: - case ZCLOSE + 6: - case ZCLOSE + 7: - case ZCLOSE + 8: - case ZCLOSE + 9: - { - no = op - ZCLOSE; - cleanup_zsubexpr(); - rp = regstack_push(RS_ZCLOSE, scan); - if (rp == NULL) - status = RA_FAIL; - else { - rp->rs_no = no; - save_se(&rp->rs_un.sesave, ®_endzpos[no], - ®_endzp[no]); - /* We simply continue and handle the result when done. */ - } - } - break; - - case BACKREF + 1: - case BACKREF + 2: - case BACKREF + 3: - case BACKREF + 4: - case BACKREF + 5: - case BACKREF + 6: - case BACKREF + 7: - case BACKREF + 8: - case BACKREF + 9: - { - int len; - - no = op - BACKREF; - cleanup_subexpr(); - if (!REG_MULTI) { /* Single-line regexp */ - if (reg_startp[no] == NULL || reg_endp[no] == NULL) { - /* Backref was not set: Match an empty string. */ - len = 0; - } else { - /* Compare current input with back-ref in the same - * line. */ - len = (int)(reg_endp[no] - reg_startp[no]); - if (cstrncmp(reg_startp[no], reginput, &len) != 0) - status = RA_NOMATCH; - } - } else { /* Multi-line regexp */ - if (reg_startpos[no].lnum < 0 || reg_endpos[no].lnum < 0) { - /* Backref was not set: Match an empty string. */ - len = 0; - } else { - if (reg_startpos[no].lnum == reglnum - && reg_endpos[no].lnum == reglnum) { - /* Compare back-ref within the current line. */ - len = reg_endpos[no].col - reg_startpos[no].col; - if (cstrncmp(regline + reg_startpos[no].col, - reginput, &len) != 0) - status = RA_NOMATCH; - } else { - /* Messy situation: Need to compare between two - * lines. */ - int r = match_with_backref( - reg_startpos[no].lnum, - reg_startpos[no].col, - reg_endpos[no].lnum, - reg_endpos[no].col, - &len); - - if (r != RA_MATCH) - status = r; - } - } - } - - /* Matched the backref, skip over it. */ - reginput += len; - } - break; - - case ZREF + 1: - case ZREF + 2: - case ZREF + 3: - case ZREF + 4: - case ZREF + 5: - case ZREF + 6: - case ZREF + 7: - case ZREF + 8: - case ZREF + 9: - { - int len; - - cleanup_zsubexpr(); - no = op - ZREF; - if (re_extmatch_in != NULL - && re_extmatch_in->matches[no] != NULL) { - len = (int)STRLEN(re_extmatch_in->matches[no]); - if (cstrncmp(re_extmatch_in->matches[no], - reginput, &len) != 0) - status = RA_NOMATCH; - else - reginput += len; - } else { - /* Backref was not set: Match an empty string. */ - } - } - break; - - case BRANCH: - { - if (OP(next) != BRANCH) /* No choice. */ - next = OPERAND(scan); /* Avoid recursion. */ - else { - rp = regstack_push(RS_BRANCH, scan); - if (rp == NULL) - status = RA_FAIL; - else - status = RA_BREAK; /* rest is below */ - } - } - break; - - case BRACE_LIMITS: - { - if (OP(next) == BRACE_SIMPLE) { - bl_minval = OPERAND_MIN(scan); - bl_maxval = OPERAND_MAX(scan); - } else if (OP(next) >= BRACE_COMPLEX - && OP(next) < BRACE_COMPLEX + 10) { - no = OP(next) - BRACE_COMPLEX; - brace_min[no] = OPERAND_MIN(scan); - brace_max[no] = OPERAND_MAX(scan); - brace_count[no] = 0; - } else { - EMSG(_(e_internal)); /* Shouldn't happen */ - status = RA_FAIL; - } - } - break; - - case BRACE_COMPLEX + 0: - case BRACE_COMPLEX + 1: - case BRACE_COMPLEX + 2: - case BRACE_COMPLEX + 3: - case BRACE_COMPLEX + 4: - case BRACE_COMPLEX + 5: - case BRACE_COMPLEX + 6: - case BRACE_COMPLEX + 7: - case BRACE_COMPLEX + 8: - case BRACE_COMPLEX + 9: - { - no = op - BRACE_COMPLEX; - ++brace_count[no]; - - /* If not matched enough times yet, try one more */ - if (brace_count[no] <= (brace_min[no] <= brace_max[no] - ? brace_min[no] : brace_max[no])) { - rp = regstack_push(RS_BRCPLX_MORE, scan); - if (rp == NULL) - status = RA_FAIL; - else { - rp->rs_no = no; - reg_save(&rp->rs_un.regsave, &backpos); - next = OPERAND(scan); - /* We continue and handle the result when done. */ - } - break; - } - - /* If matched enough times, may try matching some more */ - if (brace_min[no] <= brace_max[no]) { - /* Range is the normal way around, use longest match */ - if (brace_count[no] <= brace_max[no]) { - rp = regstack_push(RS_BRCPLX_LONG, scan); - if (rp == NULL) - status = RA_FAIL; - else { - rp->rs_no = no; - reg_save(&rp->rs_un.regsave, &backpos); - next = OPERAND(scan); - /* We continue and handle the result when done. */ - } - } - } else { - /* Range is backwards, use shortest match first */ - if (brace_count[no] <= brace_min[no]) { - rp = regstack_push(RS_BRCPLX_SHORT, scan); - if (rp == NULL) - status = RA_FAIL; - else { - reg_save(&rp->rs_un.regsave, &backpos); - /* We continue and handle the result when done. */ - } - } - } - } - break; - - case BRACE_SIMPLE: - case STAR: - case PLUS: - { - regstar_T rst; - - /* - * Lookahead to avoid useless match attempts when we know - * what character comes next. - */ - if (OP(next) == EXACTLY) { - rst.nextb = *OPERAND(next); - if (ireg_ic) { - if (vim_isupper(rst.nextb)) - rst.nextb_ic = vim_tolower(rst.nextb); - else - rst.nextb_ic = vim_toupper(rst.nextb); - } else - rst.nextb_ic = rst.nextb; - } else { - rst.nextb = NUL; - rst.nextb_ic = NUL; - } - if (op != BRACE_SIMPLE) { - rst.minval = (op == STAR) ? 0 : 1; - rst.maxval = MAX_LIMIT; - } else { - rst.minval = bl_minval; - rst.maxval = bl_maxval; - } - - /* - * When maxval > minval, try matching as much as possible, up - * to maxval. When maxval < minval, try matching at least the - * minimal number (since the range is backwards, that's also - * maxval!). - */ - rst.count = regrepeat(OPERAND(scan), rst.maxval); - if (got_int) { - status = RA_FAIL; - break; - } - if (rst.minval <= rst.maxval - ? rst.count >= rst.minval : rst.count >= rst.maxval) { - /* It could match. Prepare for trying to match what - * follows. The code is below. Parameters are stored in - * a regstar_T on the regstack. */ - if ((long)((unsigned)regstack.ga_len >> 10) >= p_mmp) { - EMSG(_(e_maxmempat)); - status = RA_FAIL; - } else { - ga_grow(®stack, sizeof(regstar_T)); - regstack.ga_len += sizeof(regstar_T); - rp = regstack_push(rst.minval <= rst.maxval - ? RS_STAR_LONG : RS_STAR_SHORT, scan); - if (rp == NULL) - status = RA_FAIL; - else { - *(((regstar_T *)rp) - 1) = rst; - status = RA_BREAK; /* skip the restore bits */ - } - } - } else - status = RA_NOMATCH; - - } - break; - - case NOMATCH: - case MATCH: - case SUBPAT: - rp = regstack_push(RS_NOMATCH, scan); - if (rp == NULL) - status = RA_FAIL; - else { - rp->rs_no = op; - reg_save(&rp->rs_un.regsave, &backpos); - next = OPERAND(scan); - /* We continue and handle the result when done. */ - } - break; - - case BEHIND: - case NOBEHIND: - /* Need a bit of room to store extra positions. */ - if ((long)((unsigned)regstack.ga_len >> 10) >= p_mmp) { - EMSG(_(e_maxmempat)); - status = RA_FAIL; - } else { - ga_grow(®stack, sizeof(regbehind_T)); - regstack.ga_len += sizeof(regbehind_T); - rp = regstack_push(RS_BEHIND1, scan); - if (rp == NULL) - status = RA_FAIL; - else { - /* Need to save the subexpr to be able to restore them - * when there is a match but we don't use it. */ - save_subexpr(((regbehind_T *)rp) - 1); - - rp->rs_no = op; - reg_save(&rp->rs_un.regsave, &backpos); - /* First try if what follows matches. If it does then we - * check the behind match by looping. */ - } - } - break; - - case BHPOS: - if (REG_MULTI) { - if (behind_pos.rs_u.pos.col != (colnr_T)(reginput - regline) - || behind_pos.rs_u.pos.lnum != reglnum) - status = RA_NOMATCH; - } else if (behind_pos.rs_u.ptr != reginput) - status = RA_NOMATCH; - break; - - case NEWL: - if ((c != NUL || !REG_MULTI || reglnum > reg_maxline - || reg_line_lbr) && (c != '\n' || !reg_line_lbr)) - status = RA_NOMATCH; - else if (reg_line_lbr) - ADVANCE_REGINPUT(); - else - reg_nextline(); - break; - - case END: - status = RA_MATCH; /* Success! */ - break; - - default: - EMSG(_(e_re_corr)); -#ifdef REGEXP_DEBUG - printf("Illegal op code %d\n", op); -#endif - status = RA_FAIL; - break; - } - } - - /* If we can't continue sequentially, break the inner loop. */ - if (status != RA_CONT) - break; - - /* Continue in inner loop, advance to next item. */ - scan = next; - - } /* end of inner loop */ - - /* - * If there is something on the regstack execute the code for the state. - * If the state is popped then loop and use the older state. - */ - while (regstack.ga_len > 0 && status != RA_FAIL) { - rp = (regitem_T *)((char *)regstack.ga_data + regstack.ga_len) - 1; - switch (rp->rs_state) { - case RS_NOPEN: - /* Result is passed on as-is, simply pop the state. */ - regstack_pop(&scan); - break; - - case RS_MOPEN: - /* Pop the state. Restore pointers when there is no match. */ - if (status == RA_NOMATCH) - restore_se(&rp->rs_un.sesave, ®_startpos[rp->rs_no], - ®_startp[rp->rs_no]); - regstack_pop(&scan); - break; - - case RS_ZOPEN: - /* Pop the state. Restore pointers when there is no match. */ - if (status == RA_NOMATCH) - restore_se(&rp->rs_un.sesave, ®_startzpos[rp->rs_no], - ®_startzp[rp->rs_no]); - regstack_pop(&scan); - break; - - case RS_MCLOSE: - /* Pop the state. Restore pointers when there is no match. */ - if (status == RA_NOMATCH) - restore_se(&rp->rs_un.sesave, ®_endpos[rp->rs_no], - ®_endp[rp->rs_no]); - regstack_pop(&scan); - break; - - case RS_ZCLOSE: - /* Pop the state. Restore pointers when there is no match. */ - if (status == RA_NOMATCH) - restore_se(&rp->rs_un.sesave, ®_endzpos[rp->rs_no], - ®_endzp[rp->rs_no]); - regstack_pop(&scan); - break; - - case RS_BRANCH: - if (status == RA_MATCH) - /* this branch matched, use it */ - regstack_pop(&scan); - else { - if (status != RA_BREAK) { - /* After a non-matching branch: try next one. */ - reg_restore(&rp->rs_un.regsave, &backpos); - scan = rp->rs_scan; - } - if (scan == NULL || OP(scan) != BRANCH) { - /* no more branches, didn't find a match */ - status = RA_NOMATCH; - regstack_pop(&scan); - } else { - /* Prepare to try a branch. */ - rp->rs_scan = regnext(scan); - reg_save(&rp->rs_un.regsave, &backpos); - scan = OPERAND(scan); - } - } - break; - - case RS_BRCPLX_MORE: - /* Pop the state. Restore pointers when there is no match. */ - if (status == RA_NOMATCH) { - reg_restore(&rp->rs_un.regsave, &backpos); - --brace_count[rp->rs_no]; /* decrement match count */ - } - regstack_pop(&scan); - break; - - case RS_BRCPLX_LONG: - /* Pop the state. Restore pointers when there is no match. */ - if (status == RA_NOMATCH) { - /* There was no match, but we did find enough matches. */ - reg_restore(&rp->rs_un.regsave, &backpos); - --brace_count[rp->rs_no]; - /* continue with the items after "\{}" */ - status = RA_CONT; - } - regstack_pop(&scan); - if (status == RA_CONT) - scan = regnext(scan); - break; - - case RS_BRCPLX_SHORT: - /* Pop the state. Restore pointers when there is no match. */ - if (status == RA_NOMATCH) - /* There was no match, try to match one more item. */ - reg_restore(&rp->rs_un.regsave, &backpos); - regstack_pop(&scan); - if (status == RA_NOMATCH) { - scan = OPERAND(scan); - status = RA_CONT; - } - break; - - case RS_NOMATCH: - /* Pop the state. If the operand matches for NOMATCH or - * doesn't match for MATCH/SUBPAT, we fail. Otherwise backup, - * except for SUBPAT, and continue with the next item. */ - if (status == (rp->rs_no == NOMATCH ? RA_MATCH : RA_NOMATCH)) - status = RA_NOMATCH; - else { - status = RA_CONT; - if (rp->rs_no != SUBPAT) /* zero-width */ - reg_restore(&rp->rs_un.regsave, &backpos); - } - regstack_pop(&scan); - if (status == RA_CONT) - scan = regnext(scan); - break; - - case RS_BEHIND1: - if (status == RA_NOMATCH) { - regstack_pop(&scan); - regstack.ga_len -= sizeof(regbehind_T); - } else { - /* The stuff after BEHIND/NOBEHIND matches. Now try if - * the behind part does (not) match before the current - * position in the input. This must be done at every - * position in the input and checking if the match ends at - * the current position. */ - - /* save the position after the found match for next */ - reg_save(&(((regbehind_T *)rp) - 1)->save_after, &backpos); - - /* Start looking for a match with operand at the current - * position. Go back one character until we find the - * result, hitting the start of the line or the previous - * line (for multi-line matching). - * Set behind_pos to where the match should end, BHPOS - * will match it. Save the current value. */ - (((regbehind_T *)rp) - 1)->save_behind = behind_pos; - behind_pos = rp->rs_un.regsave; - - rp->rs_state = RS_BEHIND2; - - reg_restore(&rp->rs_un.regsave, &backpos); - scan = OPERAND(rp->rs_scan) + 4; - } - break; - - case RS_BEHIND2: - /* - * Looping for BEHIND / NOBEHIND match. - */ - if (status == RA_MATCH && reg_save_equal(&behind_pos)) { - /* found a match that ends where "next" started */ - behind_pos = (((regbehind_T *)rp) - 1)->save_behind; - if (rp->rs_no == BEHIND) - reg_restore(&(((regbehind_T *)rp) - 1)->save_after, - &backpos); - else { - /* But we didn't want a match. Need to restore the - * subexpr, because what follows matched, so they have - * been set. */ - status = RA_NOMATCH; - restore_subexpr(((regbehind_T *)rp) - 1); - } - regstack_pop(&scan); - regstack.ga_len -= sizeof(regbehind_T); - } else { - long limit; - - /* No match or a match that doesn't end where we want it: Go - * back one character. May go to previous line once. */ - no = OK; - limit = OPERAND_MIN(rp->rs_scan); - if (REG_MULTI) { - if (limit > 0 - && ((rp->rs_un.regsave.rs_u.pos.lnum - < behind_pos.rs_u.pos.lnum - ? (colnr_T)STRLEN(regline) - : behind_pos.rs_u.pos.col) - - rp->rs_un.regsave.rs_u.pos.col >= limit)) - no = FAIL; - else if (rp->rs_un.regsave.rs_u.pos.col == 0) { - if (rp->rs_un.regsave.rs_u.pos.lnum - < behind_pos.rs_u.pos.lnum - || reg_getline( - --rp->rs_un.regsave.rs_u.pos.lnum) - == NULL) - no = FAIL; - else { - reg_restore(&rp->rs_un.regsave, &backpos); - rp->rs_un.regsave.rs_u.pos.col = - (colnr_T)STRLEN(regline); - } - } else { - if (has_mbyte) - rp->rs_un.regsave.rs_u.pos.col -= - (*mb_head_off)(regline, regline - + rp->rs_un.regsave.rs_u.pos.col - 1) + 1; - else - --rp->rs_un.regsave.rs_u.pos.col; - } - } else { - if (rp->rs_un.regsave.rs_u.ptr == regline) - no = FAIL; - else { - mb_ptr_back(regline, rp->rs_un.regsave.rs_u.ptr); - if (limit > 0 && (long)(behind_pos.rs_u.ptr - - rp->rs_un.regsave.rs_u.ptr) > limit) - no = FAIL; - } - } - if (no == OK) { - /* Advanced, prepare for finding match again. */ - reg_restore(&rp->rs_un.regsave, &backpos); - scan = OPERAND(rp->rs_scan) + 4; - if (status == RA_MATCH) { - /* We did match, so subexpr may have been changed, - * need to restore them for the next try. */ - status = RA_NOMATCH; - restore_subexpr(((regbehind_T *)rp) - 1); - } - } else { - /* Can't advance. For NOBEHIND that's a match. */ - behind_pos = (((regbehind_T *)rp) - 1)->save_behind; - if (rp->rs_no == NOBEHIND) { - reg_restore(&(((regbehind_T *)rp) - 1)->save_after, - &backpos); - status = RA_MATCH; - } else { - /* We do want a proper match. Need to restore the - * subexpr if we had a match, because they may have - * been set. */ - if (status == RA_MATCH) { - status = RA_NOMATCH; - restore_subexpr(((regbehind_T *)rp) - 1); - } - } - regstack_pop(&scan); - regstack.ga_len -= sizeof(regbehind_T); - } - } - break; - - case RS_STAR_LONG: - case RS_STAR_SHORT: - { - regstar_T *rst = ((regstar_T *)rp) - 1; - - if (status == RA_MATCH) { - regstack_pop(&scan); - regstack.ga_len -= sizeof(regstar_T); - break; - } - - /* Tried once already, restore input pointers. */ - if (status != RA_BREAK) - reg_restore(&rp->rs_un.regsave, &backpos); - - /* Repeat until we found a position where it could match. */ - for (;; ) { - if (status != RA_BREAK) { - /* Tried first position already, advance. */ - if (rp->rs_state == RS_STAR_LONG) { - /* Trying for longest match, but couldn't or - * didn't match -- back up one char. */ - if (--rst->count < rst->minval) - break; - if (reginput == regline) { - /* backup to last char of previous line */ - --reglnum; - regline = reg_getline(reglnum); - /* Just in case regrepeat() didn't count - * right. */ - if (regline == NULL) - break; - reginput = regline + STRLEN(regline); - fast_breakcheck(); - } else - mb_ptr_back(regline, reginput); - } else { - /* Range is backwards, use shortest match first. - * Careful: maxval and minval are exchanged! - * Couldn't or didn't match: try advancing one - * char. */ - if (rst->count == rst->minval - || regrepeat(OPERAND(rp->rs_scan), 1L) == 0) - break; - ++rst->count; - } - if (got_int) - break; - } else - status = RA_NOMATCH; - - /* If it could match, try it. */ - if (rst->nextb == NUL || *reginput == rst->nextb - || *reginput == rst->nextb_ic) { - reg_save(&rp->rs_un.regsave, &backpos); - scan = regnext(rp->rs_scan); - status = RA_CONT; - break; - } - } - if (status != RA_CONT) { - /* Failed. */ - regstack_pop(&scan); - regstack.ga_len -= sizeof(regstar_T); - status = RA_NOMATCH; - } - } - break; - } - - /* If we want to continue the inner loop or didn't pop a state - * continue matching loop */ - if (status == RA_CONT || rp == (regitem_T *) - ((char *)regstack.ga_data + regstack.ga_len) - 1) - break; - } - - /* May need to continue with the inner loop, starting at "scan". */ - if (status == RA_CONT) - continue; - - /* - * If the regstack is empty or something failed we are done. - */ - if (regstack.ga_len == 0 || status == RA_FAIL) { - if (scan == NULL) { - /* - * We get here only if there's trouble -- normally "case END" is - * the terminating point. - */ - EMSG(_(e_re_corr)); -#ifdef REGEXP_DEBUG - printf("Premature EOL\n"); -#endif - } - if (status == RA_FAIL) - got_int = TRUE; - return status == RA_MATCH; - } - - } /* End of loop until the regstack is empty. */ - - /* NOTREACHED */ -} - -/* - * Push an item onto the regstack. - * Returns pointer to new item. Returns NULL when out of memory. - */ -static regitem_T *regstack_push(regstate_T state, char_u *scan) -{ - regitem_T *rp; - - if ((long)((unsigned)regstack.ga_len >> 10) >= p_mmp) { - EMSG(_(e_maxmempat)); - return NULL; - } - ga_grow(®stack, sizeof(regitem_T)); - - rp = (regitem_T *)((char *)regstack.ga_data + regstack.ga_len); - rp->rs_state = state; - rp->rs_scan = scan; - - regstack.ga_len += sizeof(regitem_T); - return rp; -} - -/* - * Pop an item from the regstack. - */ -static void regstack_pop(char_u **scan) -{ - regitem_T *rp; - - rp = (regitem_T *)((char *)regstack.ga_data + regstack.ga_len) - 1; - *scan = rp->rs_scan; - - regstack.ga_len -= sizeof(regitem_T); -} - -/* - * regrepeat - repeatedly match something simple, return how many. - * Advances reginput (and reglnum) to just after the matched chars. - */ -static int -regrepeat ( - char_u *p, - long maxcount /* maximum number of matches allowed */ -) -{ - long count = 0; - char_u *scan; - char_u *opnd; - int mask; - int testval = 0; - - scan = reginput; /* Make local copy of reginput for speed. */ - opnd = OPERAND(p); - switch (OP(p)) { - case ANY: - case ANY + ADD_NL: - while (count < maxcount) { - /* Matching anything means we continue until end-of-line (or - * end-of-file for ANY + ADD_NL), only limited by maxcount. */ - while (*scan != NUL && count < maxcount) { - ++count; - mb_ptr_adv(scan); - } - if (!REG_MULTI || !WITH_NL(OP(p)) || reglnum > reg_maxline - || reg_line_lbr || count == maxcount) - break; - ++count; /* count the line-break */ - reg_nextline(); - scan = reginput; - if (got_int) - break; - } - break; - - case IDENT: - case IDENT + ADD_NL: - testval = TRUE; - /*FALLTHROUGH*/ - case SIDENT: - case SIDENT + ADD_NL: - while (count < maxcount) { - if (vim_isIDc(PTR2CHAR(scan)) && (testval || !VIM_ISDIGIT(*scan))) { - mb_ptr_adv(scan); - } else if (*scan == NUL) { - if (!REG_MULTI || !WITH_NL(OP(p)) || reglnum > reg_maxline - || reg_line_lbr) - break; - reg_nextline(); - scan = reginput; - if (got_int) - break; - } else if (reg_line_lbr && *scan == '\n' && WITH_NL(OP(p))) - ++scan; - else - break; - ++count; - } - break; - - case KWORD: - case KWORD + ADD_NL: - testval = TRUE; - /*FALLTHROUGH*/ - case SKWORD: - case SKWORD + ADD_NL: - while (count < maxcount) { - if (vim_iswordp_buf(scan, reg_buf) - && (testval || !VIM_ISDIGIT(*scan))) { - mb_ptr_adv(scan); - } else if (*scan == NUL) { - if (!REG_MULTI || !WITH_NL(OP(p)) || reglnum > reg_maxline - || reg_line_lbr) - break; - reg_nextline(); - scan = reginput; - if (got_int) - break; - } else if (reg_line_lbr && *scan == '\n' && WITH_NL(OP(p))) - ++scan; - else - break; - ++count; - } - break; - - case FNAME: - case FNAME + ADD_NL: - testval = TRUE; - /*FALLTHROUGH*/ - case SFNAME: - case SFNAME + ADD_NL: - while (count < maxcount) { - if (vim_isfilec(PTR2CHAR(scan)) && (testval || !VIM_ISDIGIT(*scan))) { - mb_ptr_adv(scan); - } else if (*scan == NUL) { - if (!REG_MULTI || !WITH_NL(OP(p)) || reglnum > reg_maxline - || reg_line_lbr) - break; - reg_nextline(); - scan = reginput; - if (got_int) - break; - } else if (reg_line_lbr && *scan == '\n' && WITH_NL(OP(p))) - ++scan; - else - break; - ++count; - } - break; - - case PRINT: - case PRINT + ADD_NL: - testval = TRUE; - /*FALLTHROUGH*/ - case SPRINT: - case SPRINT + ADD_NL: - while (count < maxcount) { - if (*scan == NUL) { - if (!REG_MULTI || !WITH_NL(OP(p)) || reglnum > reg_maxline - || reg_line_lbr) - break; - reg_nextline(); - scan = reginput; - if (got_int) - break; - } else if (vim_isprintc(PTR2CHAR(scan)) == 1 - && (testval || !VIM_ISDIGIT(*scan))) { - mb_ptr_adv(scan); - } else if (reg_line_lbr && *scan == '\n' && WITH_NL(OP(p))) - ++scan; - else - break; - ++count; - } - break; - - case WHITE: - case WHITE + ADD_NL: - testval = mask = RI_WHITE; -do_class: - while (count < maxcount) { - int l; - if (*scan == NUL) { - if (!REG_MULTI || !WITH_NL(OP(p)) || reglnum > reg_maxline - || reg_line_lbr) - break; - reg_nextline(); - scan = reginput; - if (got_int) - break; - } else if (has_mbyte && (l = (*mb_ptr2len)(scan)) > 1) { - if (testval != 0) - break; - scan += l; - } else if ((class_tab[*scan] & mask) == testval) - ++scan; - else if (reg_line_lbr && *scan == '\n' && WITH_NL(OP(p))) - ++scan; - else - break; - ++count; - } - break; - - case NWHITE: - case NWHITE + ADD_NL: - mask = RI_WHITE; - goto do_class; - case DIGIT: - case DIGIT + ADD_NL: - testval = mask = RI_DIGIT; - goto do_class; - case NDIGIT: - case NDIGIT + ADD_NL: - mask = RI_DIGIT; - goto do_class; - case HEX: - case HEX + ADD_NL: - testval = mask = RI_HEX; - goto do_class; - case NHEX: - case NHEX + ADD_NL: - mask = RI_HEX; - goto do_class; - case OCTAL: - case OCTAL + ADD_NL: - testval = mask = RI_OCTAL; - goto do_class; - case NOCTAL: - case NOCTAL + ADD_NL: - mask = RI_OCTAL; - goto do_class; - case WORD: - case WORD + ADD_NL: - testval = mask = RI_WORD; - goto do_class; - case NWORD: - case NWORD + ADD_NL: - mask = RI_WORD; - goto do_class; - case HEAD: - case HEAD + ADD_NL: - testval = mask = RI_HEAD; - goto do_class; - case NHEAD: - case NHEAD + ADD_NL: - mask = RI_HEAD; - goto do_class; - case ALPHA: - case ALPHA + ADD_NL: - testval = mask = RI_ALPHA; - goto do_class; - case NALPHA: - case NALPHA + ADD_NL: - mask = RI_ALPHA; - goto do_class; - case LOWER: - case LOWER + ADD_NL: - testval = mask = RI_LOWER; - goto do_class; - case NLOWER: - case NLOWER + ADD_NL: - mask = RI_LOWER; - goto do_class; - case UPPER: - case UPPER + ADD_NL: - testval = mask = RI_UPPER; - goto do_class; - case NUPPER: - case NUPPER + ADD_NL: - mask = RI_UPPER; - goto do_class; - - case EXACTLY: - { - int cu, cl; - - /* This doesn't do a multi-byte character, because a MULTIBYTECODE - * would have been used for it. It does handle single-byte - * characters, such as latin1. */ - if (ireg_ic) { - cu = vim_toupper(*opnd); - cl = vim_tolower(*opnd); - while (count < maxcount && (*scan == cu || *scan == cl)) { - count++; - scan++; - } - } else { - cu = *opnd; - while (count < maxcount && *scan == cu) { - count++; - scan++; - } - } - break; - } - - case MULTIBYTECODE: - { - int i, len, cf = 0; - - /* Safety check (just in case 'encoding' was changed since - * compiling the program). */ - if ((len = (*mb_ptr2len)(opnd)) > 1) { - if (ireg_ic && enc_utf8) - cf = utf_fold(utf_ptr2char(opnd)); - while (count < maxcount) { - for (i = 0; i < len; ++i) - if (opnd[i] != scan[i]) - break; - if (i < len && (!ireg_ic || !enc_utf8 - || utf_fold(utf_ptr2char(scan)) != cf)) - break; - scan += len; - ++count; - } - } - } - break; - - case ANYOF: - case ANYOF + ADD_NL: - testval = TRUE; - /*FALLTHROUGH*/ - - case ANYBUT: - case ANYBUT + ADD_NL: - while (count < maxcount) { - int len; - if (*scan == NUL) { - if (!REG_MULTI || !WITH_NL(OP(p)) || reglnum > reg_maxline - || reg_line_lbr) - break; - reg_nextline(); - scan = reginput; - if (got_int) - break; - } else if (reg_line_lbr && *scan == '\n' && WITH_NL(OP(p))) - ++scan; - else if (has_mbyte && (len = (*mb_ptr2len)(scan)) > 1) { - if ((cstrchr(opnd, (*mb_ptr2char)(scan)) == NULL) == testval) - break; - scan += len; - } else { - if ((cstrchr(opnd, *scan) == NULL) == testval) - break; - ++scan; - } - ++count; - } - break; - - case NEWL: - while (count < maxcount - && ((*scan == NUL && reglnum <= reg_maxline && !reg_line_lbr - && REG_MULTI) || (*scan == '\n' && reg_line_lbr))) { - count++; - if (reg_line_lbr) - ADVANCE_REGINPUT(); - else - reg_nextline(); - scan = reginput; - if (got_int) - break; - } - break; - - default: /* Oh dear. Called inappropriately. */ - EMSG(_(e_re_corr)); -#ifdef REGEXP_DEBUG - printf("Called regrepeat with op code %d\n", OP(p)); -#endif - break; - } - - reginput = scan; - - return (int)count; -} - -/* - * regnext - dig the "next" pointer out of a node - * Returns NULL when calculating size, when there is no next item and when - * there is an error. - */ -static char_u *regnext(char_u *p) -{ - int offset; - - if (p == JUST_CALC_SIZE || reg_toolong) - return NULL; - - offset = NEXT(p); - if (offset == 0) - return NULL; - - if (OP(p) == BACK) - return p - offset; - else - return p + offset; -} - -/* - * Check the regexp program for its magic number. - * Return TRUE if it's wrong. - */ -static int prog_magic_wrong(void) -{ - regprog_T *prog; - - prog = REG_MULTI ? reg_mmatch->regprog : reg_match->regprog; - if (prog->engine == &nfa_regengine) - /* For NFA matcher we don't check the magic */ - return FALSE; - - if (UCHARAT(((bt_regprog_T *)prog)->program) != REGMAGIC) { - EMSG(_(e_re_corr)); - return TRUE; - } - return FALSE; -} - -/* - * Cleanup the subexpressions, if this wasn't done yet. - * This construction is used to clear the subexpressions only when they are - * used (to increase speed). - */ -static void cleanup_subexpr(void) -{ - if (need_clear_subexpr) { - if (REG_MULTI) { - /* Use 0xff to set lnum to -1 */ - memset(reg_startpos, 0xff, sizeof(lpos_T) * NSUBEXP); - memset(reg_endpos, 0xff, sizeof(lpos_T) * NSUBEXP); - } else { - memset(reg_startp, 0, sizeof(char_u *) * NSUBEXP); - memset(reg_endp, 0, sizeof(char_u *) * NSUBEXP); - } - need_clear_subexpr = FALSE; - } -} - -static void cleanup_zsubexpr(void) -{ - if (need_clear_zsubexpr) { - if (REG_MULTI) { - /* Use 0xff to set lnum to -1 */ - memset(reg_startzpos, 0xff, sizeof(lpos_T) * NSUBEXP); - memset(reg_endzpos, 0xff, sizeof(lpos_T) * NSUBEXP); - } else { - memset(reg_startzp, 0, sizeof(char_u *) * NSUBEXP); - memset(reg_endzp, 0, sizeof(char_u *) * NSUBEXP); - } - need_clear_zsubexpr = FALSE; - } -} - -/* - * Save the current subexpr to "bp", so that they can be restored - * later by restore_subexpr(). - */ -static void save_subexpr(regbehind_T *bp) -{ - int i; - - /* When "need_clear_subexpr" is set we don't need to save the values, only - * remember that this flag needs to be set again when restoring. */ - bp->save_need_clear_subexpr = need_clear_subexpr; - if (!need_clear_subexpr) { - for (i = 0; i < NSUBEXP; ++i) { - if (REG_MULTI) { - bp->save_start[i].se_u.pos = reg_startpos[i]; - bp->save_end[i].se_u.pos = reg_endpos[i]; - } else { - bp->save_start[i].se_u.ptr = reg_startp[i]; - bp->save_end[i].se_u.ptr = reg_endp[i]; - } - } - } -} - -/* - * Restore the subexpr from "bp". - */ -static void restore_subexpr(regbehind_T *bp) -{ - int i; - - /* Only need to restore saved values when they are not to be cleared. */ - need_clear_subexpr = bp->save_need_clear_subexpr; - if (!need_clear_subexpr) { - for (i = 0; i < NSUBEXP; ++i) { - if (REG_MULTI) { - reg_startpos[i] = bp->save_start[i].se_u.pos; - reg_endpos[i] = bp->save_end[i].se_u.pos; - } else { - reg_startp[i] = bp->save_start[i].se_u.ptr; - reg_endp[i] = bp->save_end[i].se_u.ptr; - } - } - } -} - -/* - * Advance reglnum, regline and reginput to the next line. - */ -static void reg_nextline(void) -{ - regline = reg_getline(++reglnum); - reginput = regline; - fast_breakcheck(); -} - -/* - * Save the input line and position in a regsave_T. - */ -static void reg_save(regsave_T *save, garray_T *gap) -{ - if (REG_MULTI) { - save->rs_u.pos.col = (colnr_T)(reginput - regline); - save->rs_u.pos.lnum = reglnum; - } else - save->rs_u.ptr = reginput; - save->rs_len = gap->ga_len; -} - -/* - * Restore the input line and position from a regsave_T. - */ -static void reg_restore(regsave_T *save, garray_T *gap) -{ - if (REG_MULTI) { - if (reglnum != save->rs_u.pos.lnum) { - /* only call reg_getline() when the line number changed to save - * a bit of time */ - reglnum = save->rs_u.pos.lnum; - regline = reg_getline(reglnum); - } - reginput = regline + save->rs_u.pos.col; - } else - reginput = save->rs_u.ptr; - gap->ga_len = save->rs_len; -} - -/* - * Return TRUE if current position is equal to saved position. - */ -static int reg_save_equal(regsave_T *save) -{ - if (REG_MULTI) - return reglnum == save->rs_u.pos.lnum - && reginput == regline + save->rs_u.pos.col; - return reginput == save->rs_u.ptr; -} - -/* - * Tentatively set the sub-expression start to the current position (after - * calling regmatch() they will have changed). Need to save the existing - * values for when there is no match. - * Use se_save() to use pointer (save_se_multi()) or position (save_se_one()), - * depending on REG_MULTI. - */ -static void save_se_multi(save_se_T *savep, lpos_T *posp) -{ - savep->se_u.pos = *posp; - posp->lnum = reglnum; - posp->col = (colnr_T)(reginput - regline); -} - -static void save_se_one(save_se_T *savep, char_u **pp) -{ - savep->se_u.ptr = *pp; - *pp = reginput; -} - -/* - * Compare a number with the operand of RE_LNUM, RE_COL or RE_VCOL. - */ -static int re_num_cmp(long_u val, char_u *scan) -{ - long_u n = OPERAND_MIN(scan); - - if (OPERAND_CMP(scan) == '>') - return val > n; - if (OPERAND_CMP(scan) == '<') - return val < n; - return val == n; -} - -/* - * Check whether a backreference matches. - * Returns RA_FAIL, RA_NOMATCH or RA_MATCH. - * If "bytelen" is not NULL, it is set to the byte length of the match in the - * last line. - */ -static int match_with_backref(linenr_T start_lnum, colnr_T start_col, linenr_T end_lnum, colnr_T end_col, int *bytelen) -{ - linenr_T clnum = start_lnum; - colnr_T ccol = start_col; - int len; - char_u *p; - - if (bytelen != NULL) - *bytelen = 0; - for (;; ) { - /* Since getting one line may invalidate the other, need to make copy. - * Slow! */ - if (regline != reg_tofree) { - len = (int)STRLEN(regline); - if (reg_tofree == NULL || len >= (int)reg_tofreelen) { - len += 50; /* get some extra */ - free(reg_tofree); - reg_tofree = alloc(len); - reg_tofreelen = len; - } - STRCPY(reg_tofree, regline); - reginput = reg_tofree + (reginput - regline); - regline = reg_tofree; - } - - /* Get the line to compare with. */ - p = reg_getline(clnum); - if (clnum == end_lnum) - len = end_col - ccol; - else - len = (int)STRLEN(p + ccol); - - if (cstrncmp(p + ccol, reginput, &len) != 0) - return RA_NOMATCH; /* doesn't match */ - if (bytelen != NULL) - *bytelen += len; - if (clnum == end_lnum) - break; /* match and at end! */ - if (reglnum >= reg_maxline) - return RA_NOMATCH; /* text too short */ - - /* Advance to next line. */ - reg_nextline(); - if (bytelen != NULL) - *bytelen = 0; - ++clnum; - ccol = 0; - if (got_int) - return RA_FAIL; - } - - /* found a match! Note that regline may now point to a copy of the line, - * that should not matter. */ - return RA_MATCH; -} - -#ifdef BT_REGEXP_DUMP - -/* - * regdump - dump a regexp onto stdout in vaguely comprehensible form - */ -static void regdump(char_u *pattern, bt_regprog_T *r) -{ - char_u *s; - int op = EXACTLY; /* Arbitrary non-END op. */ - char_u *next; - char_u *end = NULL; - FILE *f; - -#ifdef BT_REGEXP_LOG - f = fopen("bt_regexp_log.log", "a"); -#else - f = stdout; -#endif - if (f == NULL) - return; - fprintf(f, "-------------------------------------\n\r\nregcomp(%s):\r\n", - pattern); - - s = r->program + 1; - /* - * Loop until we find the END that isn't before a referred next (an END - * can also appear in a NOMATCH operand). - */ - while (op != END || s <= end) { - op = OP(s); - fprintf(f, "%2d%s", (int)(s - r->program), regprop(s)); /* Where, what. */ - next = regnext(s); - if (next == NULL) /* Next ptr. */ - fprintf(f, "(0)"); - else - fprintf(f, "(%d)", (int)((s - r->program) + (next - s))); - if (end < next) - end = next; - if (op == BRACE_LIMITS) { - /* Two ints */ - fprintf(f, " minval %" PRId64 ", maxval %" PRId64, - (int64_t)OPERAND_MIN(s), (int64_t)OPERAND_MAX(s)); - s += 8; - } else if (op == BEHIND || op == NOBEHIND) { - /* one int */ - fprintf(f, " count %" PRId64, (int64_t)OPERAND_MIN(s)); - s += 4; - } else if (op == RE_LNUM || op == RE_COL || op == RE_VCOL) { - /* one int plus comperator */ - fprintf(f, " count %" PRId64, (int64_t)OPERAND_MIN(s)); - s += 5; - } - s += 3; - if (op == ANYOF || op == ANYOF + ADD_NL - || op == ANYBUT || op == ANYBUT + ADD_NL - || op == EXACTLY) { - /* Literal string, where present. */ - fprintf(f, "\nxxxxxxxxx\n"); - while (*s != NUL) - fprintf(f, "%c", *s++); - fprintf(f, "\nxxxxxxxxx\n"); - s++; - } - fprintf(f, "\r\n"); - } - - /* Header fields of interest. */ - if (r->regstart != NUL) - fprintf(f, "start `%s' 0x%x; ", r->regstart < 256 - ? (char *)transchar(r->regstart) - : "multibyte", r->regstart); - if (r->reganch) - fprintf(f, "anchored; "); - if (r->regmust != NULL) - fprintf(f, "must have \"%s\"", r->regmust); - fprintf(f, "\r\n"); - -#ifdef BT_REGEXP_LOG - fclose(f); -#endif -} -#endif /* BT_REGEXP_DUMP */ - -#ifdef REGEXP_DEBUG -/* - * regprop - printable representation of opcode - */ -static char_u *regprop(char_u *op) -{ - char *p; - static char buf[50]; - - STRCPY(buf, ":"); - - switch ((int) OP(op)) { - case BOL: - p = "BOL"; - break; - case EOL: - p = "EOL"; - break; - case RE_BOF: - p = "BOF"; - break; - case RE_EOF: - p = "EOF"; - break; - case CURSOR: - p = "CURSOR"; - break; - case RE_VISUAL: - p = "RE_VISUAL"; - break; - case RE_LNUM: - p = "RE_LNUM"; - break; - case RE_MARK: - p = "RE_MARK"; - break; - case RE_COL: - p = "RE_COL"; - break; - case RE_VCOL: - p = "RE_VCOL"; - break; - case BOW: - p = "BOW"; - break; - case EOW: - p = "EOW"; - break; - case ANY: - p = "ANY"; - break; - case ANY + ADD_NL: - p = "ANY+NL"; - break; - case ANYOF: - p = "ANYOF"; - break; - case ANYOF + ADD_NL: - p = "ANYOF+NL"; - break; - case ANYBUT: - p = "ANYBUT"; - break; - case ANYBUT + ADD_NL: - p = "ANYBUT+NL"; - break; - case IDENT: - p = "IDENT"; - break; - case IDENT + ADD_NL: - p = "IDENT+NL"; - break; - case SIDENT: - p = "SIDENT"; - break; - case SIDENT + ADD_NL: - p = "SIDENT+NL"; - break; - case KWORD: - p = "KWORD"; - break; - case KWORD + ADD_NL: - p = "KWORD+NL"; - break; - case SKWORD: - p = "SKWORD"; - break; - case SKWORD + ADD_NL: - p = "SKWORD+NL"; - break; - case FNAME: - p = "FNAME"; - break; - case FNAME + ADD_NL: - p = "FNAME+NL"; - break; - case SFNAME: - p = "SFNAME"; - break; - case SFNAME + ADD_NL: - p = "SFNAME+NL"; - break; - case PRINT: - p = "PRINT"; - break; - case PRINT + ADD_NL: - p = "PRINT+NL"; - break; - case SPRINT: - p = "SPRINT"; - break; - case SPRINT + ADD_NL: - p = "SPRINT+NL"; - break; - case WHITE: - p = "WHITE"; - break; - case WHITE + ADD_NL: - p = "WHITE+NL"; - break; - case NWHITE: - p = "NWHITE"; - break; - case NWHITE + ADD_NL: - p = "NWHITE+NL"; - break; - case DIGIT: - p = "DIGIT"; - break; - case DIGIT + ADD_NL: - p = "DIGIT+NL"; - break; - case NDIGIT: - p = "NDIGIT"; - break; - case NDIGIT + ADD_NL: - p = "NDIGIT+NL"; - break; - case HEX: - p = "HEX"; - break; - case HEX + ADD_NL: - p = "HEX+NL"; - break; - case NHEX: - p = "NHEX"; - break; - case NHEX + ADD_NL: - p = "NHEX+NL"; - break; - case OCTAL: - p = "OCTAL"; - break; - case OCTAL + ADD_NL: - p = "OCTAL+NL"; - break; - case NOCTAL: - p = "NOCTAL"; - break; - case NOCTAL + ADD_NL: - p = "NOCTAL+NL"; - break; - case WORD: - p = "WORD"; - break; - case WORD + ADD_NL: - p = "WORD+NL"; - break; - case NWORD: - p = "NWORD"; - break; - case NWORD + ADD_NL: - p = "NWORD+NL"; - break; - case HEAD: - p = "HEAD"; - break; - case HEAD + ADD_NL: - p = "HEAD+NL"; - break; - case NHEAD: - p = "NHEAD"; - break; - case NHEAD + ADD_NL: - p = "NHEAD+NL"; - break; - case ALPHA: - p = "ALPHA"; - break; - case ALPHA + ADD_NL: - p = "ALPHA+NL"; - break; - case NALPHA: - p = "NALPHA"; - break; - case NALPHA + ADD_NL: - p = "NALPHA+NL"; - break; - case LOWER: - p = "LOWER"; - break; - case LOWER + ADD_NL: - p = "LOWER+NL"; - break; - case NLOWER: - p = "NLOWER"; - break; - case NLOWER + ADD_NL: - p = "NLOWER+NL"; - break; - case UPPER: - p = "UPPER"; - break; - case UPPER + ADD_NL: - p = "UPPER+NL"; - break; - case NUPPER: - p = "NUPPER"; - break; - case NUPPER + ADD_NL: - p = "NUPPER+NL"; - break; - case BRANCH: - p = "BRANCH"; - break; - case EXACTLY: - p = "EXACTLY"; - break; - case NOTHING: - p = "NOTHING"; - break; - case BACK: - p = "BACK"; - break; - case END: - p = "END"; - break; - case MOPEN + 0: - p = "MATCH START"; - break; - case MOPEN + 1: - case MOPEN + 2: - case MOPEN + 3: - case MOPEN + 4: - case MOPEN + 5: - case MOPEN + 6: - case MOPEN + 7: - case MOPEN + 8: - case MOPEN + 9: - sprintf(buf + STRLEN(buf), "MOPEN%d", OP(op) - MOPEN); - p = NULL; - break; - case MCLOSE + 0: - p = "MATCH END"; - break; - case MCLOSE + 1: - case MCLOSE + 2: - case MCLOSE + 3: - case MCLOSE + 4: - case MCLOSE + 5: - case MCLOSE + 6: - case MCLOSE + 7: - case MCLOSE + 8: - case MCLOSE + 9: - sprintf(buf + STRLEN(buf), "MCLOSE%d", OP(op) - MCLOSE); - p = NULL; - break; - case BACKREF + 1: - case BACKREF + 2: - case BACKREF + 3: - case BACKREF + 4: - case BACKREF + 5: - case BACKREF + 6: - case BACKREF + 7: - case BACKREF + 8: - case BACKREF + 9: - sprintf(buf + STRLEN(buf), "BACKREF%d", OP(op) - BACKREF); - p = NULL; - break; - case NOPEN: - p = "NOPEN"; - break; - case NCLOSE: - p = "NCLOSE"; - break; - case ZOPEN + 1: - case ZOPEN + 2: - case ZOPEN + 3: - case ZOPEN + 4: - case ZOPEN + 5: - case ZOPEN + 6: - case ZOPEN + 7: - case ZOPEN + 8: - case ZOPEN + 9: - sprintf(buf + STRLEN(buf), "ZOPEN%d", OP(op) - ZOPEN); - p = NULL; - break; - case ZCLOSE + 1: - case ZCLOSE + 2: - case ZCLOSE + 3: - case ZCLOSE + 4: - case ZCLOSE + 5: - case ZCLOSE + 6: - case ZCLOSE + 7: - case ZCLOSE + 8: - case ZCLOSE + 9: - sprintf(buf + STRLEN(buf), "ZCLOSE%d", OP(op) - ZCLOSE); - p = NULL; - break; - case ZREF + 1: - case ZREF + 2: - case ZREF + 3: - case ZREF + 4: - case ZREF + 5: - case ZREF + 6: - case ZREF + 7: - case ZREF + 8: - case ZREF + 9: - sprintf(buf + STRLEN(buf), "ZREF%d", OP(op) - ZREF); - p = NULL; - break; - case STAR: - p = "STAR"; - break; - case PLUS: - p = "PLUS"; - break; - case NOMATCH: - p = "NOMATCH"; - break; - case MATCH: - p = "MATCH"; - break; - case BEHIND: - p = "BEHIND"; - break; - case NOBEHIND: - p = "NOBEHIND"; - break; - case SUBPAT: - p = "SUBPAT"; - break; - case BRACE_LIMITS: - p = "BRACE_LIMITS"; - break; - case BRACE_SIMPLE: - p = "BRACE_SIMPLE"; - break; - case BRACE_COMPLEX + 0: - case BRACE_COMPLEX + 1: - case BRACE_COMPLEX + 2: - case BRACE_COMPLEX + 3: - case BRACE_COMPLEX + 4: - case BRACE_COMPLEX + 5: - case BRACE_COMPLEX + 6: - case BRACE_COMPLEX + 7: - case BRACE_COMPLEX + 8: - case BRACE_COMPLEX + 9: - sprintf(buf + STRLEN(buf), "BRACE_COMPLEX%d", OP(op) - BRACE_COMPLEX); - p = NULL; - break; - case MULTIBYTECODE: - p = "MULTIBYTECODE"; - break; - case NEWL: - p = "NEWL"; - break; - default: - sprintf(buf + STRLEN(buf), "corrupt %d", OP(op)); - p = NULL; - break; - } - if (p != NULL) - STRCAT(buf, p); - return (char_u *)buf; -} -#endif /* REGEXP_DEBUG */ - -static void mb_decompose(int c, int *c1, int *c2, int *c3); - -typedef struct { - int a, b, c; -} decomp_T; - - -/* 0xfb20 - 0xfb4f */ -static decomp_T decomp_table[0xfb4f-0xfb20+1] = -{ - {0x5e2,0,0}, /* 0xfb20 alt ayin */ - {0x5d0,0,0}, /* 0xfb21 alt alef */ - {0x5d3,0,0}, /* 0xfb22 alt dalet */ - {0x5d4,0,0}, /* 0xfb23 alt he */ - {0x5db,0,0}, /* 0xfb24 alt kaf */ - {0x5dc,0,0}, /* 0xfb25 alt lamed */ - {0x5dd,0,0}, /* 0xfb26 alt mem-sofit */ - {0x5e8,0,0}, /* 0xfb27 alt resh */ - {0x5ea,0,0}, /* 0xfb28 alt tav */ - {'+', 0, 0}, /* 0xfb29 alt plus */ - {0x5e9, 0x5c1, 0}, /* 0xfb2a shin+shin-dot */ - {0x5e9, 0x5c2, 0}, /* 0xfb2b shin+sin-dot */ - {0x5e9, 0x5c1, 0x5bc}, /* 0xfb2c shin+shin-dot+dagesh */ - {0x5e9, 0x5c2, 0x5bc}, /* 0xfb2d shin+sin-dot+dagesh */ - {0x5d0, 0x5b7, 0}, /* 0xfb2e alef+patah */ - {0x5d0, 0x5b8, 0}, /* 0xfb2f alef+qamats */ - {0x5d0, 0x5b4, 0}, /* 0xfb30 alef+hiriq */ - {0x5d1, 0x5bc, 0}, /* 0xfb31 bet+dagesh */ - {0x5d2, 0x5bc, 0}, /* 0xfb32 gimel+dagesh */ - {0x5d3, 0x5bc, 0}, /* 0xfb33 dalet+dagesh */ - {0x5d4, 0x5bc, 0}, /* 0xfb34 he+dagesh */ - {0x5d5, 0x5bc, 0}, /* 0xfb35 vav+dagesh */ - {0x5d6, 0x5bc, 0}, /* 0xfb36 zayin+dagesh */ - {0xfb37, 0, 0}, /* 0xfb37 -- */ - {0x5d8, 0x5bc, 0}, /* 0xfb38 tet+dagesh */ - {0x5d9, 0x5bc, 0}, /* 0xfb39 yud+dagesh */ - {0x5da, 0x5bc, 0}, /* 0xfb3a kaf sofit+dagesh */ - {0x5db, 0x5bc, 0}, /* 0xfb3b kaf+dagesh */ - {0x5dc, 0x5bc, 0}, /* 0xfb3c lamed+dagesh */ - {0xfb3d, 0, 0}, /* 0xfb3d -- */ - {0x5de, 0x5bc, 0}, /* 0xfb3e mem+dagesh */ - {0xfb3f, 0, 0}, /* 0xfb3f -- */ - {0x5e0, 0x5bc, 0}, /* 0xfb40 nun+dagesh */ - {0x5e1, 0x5bc, 0}, /* 0xfb41 samech+dagesh */ - {0xfb42, 0, 0}, /* 0xfb42 -- */ - {0x5e3, 0x5bc, 0}, /* 0xfb43 pe sofit+dagesh */ - {0x5e4, 0x5bc,0}, /* 0xfb44 pe+dagesh */ - {0xfb45, 0, 0}, /* 0xfb45 -- */ - {0x5e6, 0x5bc, 0}, /* 0xfb46 tsadi+dagesh */ - {0x5e7, 0x5bc, 0}, /* 0xfb47 qof+dagesh */ - {0x5e8, 0x5bc, 0}, /* 0xfb48 resh+dagesh */ - {0x5e9, 0x5bc, 0}, /* 0xfb49 shin+dagesh */ - {0x5ea, 0x5bc, 0}, /* 0xfb4a tav+dagesh */ - {0x5d5, 0x5b9, 0}, /* 0xfb4b vav+holam */ - {0x5d1, 0x5bf, 0}, /* 0xfb4c bet+rafe */ - {0x5db, 0x5bf, 0}, /* 0xfb4d kaf+rafe */ - {0x5e4, 0x5bf, 0}, /* 0xfb4e pe+rafe */ - {0x5d0, 0x5dc, 0} /* 0xfb4f alef-lamed */ -}; - -static void mb_decompose(int c, int *c1, int *c2, int *c3) -{ - decomp_T d; - - if (c >= 0xfb20 && c <= 0xfb4f) { - d = decomp_table[c - 0xfb20]; - *c1 = d.a; - *c2 = d.b; - *c3 = d.c; - } else { - *c1 = c; - *c2 = *c3 = 0; - } -} - -/* - * Compare two strings, ignore case if ireg_ic set. - * Return 0 if strings match, non-zero otherwise. - * Correct the length "*n" when composing characters are ignored. - */ -static int cstrncmp(char_u *s1, char_u *s2, int *n) -{ - int result; - - if (!ireg_ic) - result = STRNCMP(s1, s2, *n); - else - result = MB_STRNICMP(s1, s2, *n); - - /* if it failed and it's utf8 and we want to combineignore: */ - if (result != 0 && enc_utf8 && ireg_icombine) { - char_u *str1, *str2; - int c1, c2, c11, c12; - int junk; - - /* we have to handle the strcmp ourselves, since it is necessary to - * deal with the composing characters by ignoring them: */ - str1 = s1; - str2 = s2; - c1 = c2 = 0; - while ((int)(str1 - s1) < *n) { - c1 = mb_ptr2char_adv(&str1); - c2 = mb_ptr2char_adv(&str2); - - /* decompose the character if necessary, into 'base' characters - * because I don't care about Arabic, I will hard-code the Hebrew - * which I *do* care about! So sue me... */ - if (c1 != c2 && (!ireg_ic || utf_fold(c1) != utf_fold(c2))) { - /* decomposition necessary? */ - mb_decompose(c1, &c11, &junk, &junk); - mb_decompose(c2, &c12, &junk, &junk); - c1 = c11; - c2 = c12; - if (c11 != c12 && (!ireg_ic || utf_fold(c11) != utf_fold(c12))) - break; - } - } - result = c2 - c1; - if (result == 0) - *n = (int)(str2 - s2); - } - - return result; -} - -/* - * cstrchr: This function is used a lot for simple searches, keep it fast! - */ -static char_u *cstrchr(char_u *s, int c) -{ - char_u *p; - int cc; - - if (!ireg_ic - || (!enc_utf8 && mb_char2len(c) > 1) - ) - return vim_strchr(s, c); - - /* tolower() and toupper() can be slow, comparing twice should be a lot - * faster (esp. when using MS Visual C++!). - * For UTF-8 need to use folded case. */ - if (enc_utf8 && c > 0x80) - cc = utf_fold(c); - else if (vim_isupper(c)) - cc = vim_tolower(c); - else if (vim_islower(c)) - cc = vim_toupper(c); - else - return vim_strchr(s, c); - - if (has_mbyte) { - for (p = s; *p != NUL; p += (*mb_ptr2len)(p)) { - if (enc_utf8 && c > 0x80) { - if (utf_fold(utf_ptr2char(p)) == cc) - return p; - } else if (*p == c || *p == cc) - return p; - } - } else - /* Faster version for when there are no multi-byte characters. */ - for (p = s; *p != NUL; ++p) - if (*p == c || *p == cc) - return p; - - return NULL; -} - -/*************************************************************** -* regsub stuff * -***************************************************************/ - -/* This stuff below really confuses cc on an SGI -- webb */ - -/* - * We should define ftpr as a pointer to a function returning a pointer to - * a function returning a pointer to a function ... - * This is impossible, so we declare a pointer to a function returning a - * pointer to a function returning void. This should work for all compilers. - */ -typedef void (*(*fptr_T)(int *, int))(); - -static fptr_T do_upper(int *, int); -static fptr_T do_Upper(int *, int); -static fptr_T do_lower(int *, int); -static fptr_T do_Lower(int *, int); - -static int vim_regsub_both(char_u *source, char_u *dest, int copy, - int magic, - int backslash); - -static fptr_T do_upper(d, c) -int *d; -int c; -{ - *d = vim_toupper(c); - - return (fptr_T)NULL; -} - -static fptr_T do_Upper(d, c) -int *d; -int c; -{ - *d = vim_toupper(c); - - return (fptr_T)do_Upper; -} - -static fptr_T do_lower(d, c) -int *d; -int c; -{ - *d = vim_tolower(c); - - return (fptr_T)NULL; -} - -static fptr_T do_Lower(d, c) -int *d; -int c; -{ - *d = vim_tolower(c); - - return (fptr_T)do_Lower; -} - -/* - * regtilde(): Replace tildes in the pattern by the old pattern. - * - * Short explanation of the tilde: It stands for the previous replacement - * pattern. If that previous pattern also contains a ~ we should go back a - * step further... But we insert the previous pattern into the current one - * and remember that. - * This still does not handle the case where "magic" changes. So require the - * user to keep his hands off of "magic". - * - * The tildes are parsed once before the first call to vim_regsub(). - */ -char_u *regtilde(char_u *source, int magic) -{ - char_u *newsub = source; - char_u *tmpsub; - char_u *p; - int len; - int prevlen; - - for (p = newsub; *p; ++p) { - if ((*p == '~' && magic) || (*p == '\\' && *(p + 1) == '~' && !magic)) { - if (reg_prev_sub != NULL) { - /* length = len(newsub) - 1 + len(prev_sub) + 1 */ - prevlen = (int)STRLEN(reg_prev_sub); - tmpsub = alloc((unsigned)(STRLEN(newsub) + prevlen)); - /* copy prefix */ - len = (int)(p - newsub); /* not including ~ */ - memmove(tmpsub, newsub, (size_t)len); - /* interpret tilde */ - memmove(tmpsub + len, reg_prev_sub, (size_t)prevlen); - /* copy postfix */ - if (!magic) - ++p; /* back off \ */ - STRCPY(tmpsub + len + prevlen, p + 1); - - if (newsub != source) /* already allocated newsub */ - free(newsub); - newsub = tmpsub; - p = newsub + len + prevlen; - } else if (magic) - STRMOVE(p, p + 1); /* remove '~' */ - else - STRMOVE(p, p + 2); /* remove '\~' */ - --p; - } else { - if (*p == '\\' && p[1]) /* skip escaped characters */ - ++p; - if (has_mbyte) - p += (*mb_ptr2len)(p) - 1; - } - } - - free(reg_prev_sub); - if (newsub != source) /* newsub was allocated, just keep it */ - reg_prev_sub = newsub; - else /* no ~ found, need to save newsub */ - reg_prev_sub = vim_strsave(newsub); - return newsub; -} - -static int can_f_submatch = FALSE; /* TRUE when submatch() can be used */ - -/* These pointers are used instead of reg_match and reg_mmatch for - * reg_submatch(). Needed for when the substitution string is an expression - * that contains a call to substitute() and submatch(). */ -static regmatch_T *submatch_match; -static regmmatch_T *submatch_mmatch; -static linenr_T submatch_firstlnum; -static linenr_T submatch_maxline; -static int submatch_line_lbr; - -/* - * vim_regsub() - perform substitutions after a vim_regexec() or - * vim_regexec_multi() match. - * - * If "copy" is TRUE really copy into "dest". - * If "copy" is FALSE nothing is copied, this is just to find out the length - * of the result. - * - * If "backslash" is TRUE, a backslash will be removed later, need to double - * them to keep them, and insert a backslash before a CR to avoid it being - * replaced with a line break later. - * - * Note: The matched text must not change between the call of - * vim_regexec()/vim_regexec_multi() and vim_regsub()! It would make the back - * references invalid! - * - * Returns the size of the replacement, including terminating NUL. - */ -int vim_regsub(regmatch_T *rmp, char_u *source, char_u *dest, int copy, int magic, int backslash) -{ - reg_match = rmp; - reg_mmatch = NULL; - reg_maxline = 0; - reg_buf = curbuf; - reg_line_lbr = TRUE; - return vim_regsub_both(source, dest, copy, magic, backslash); -} - -int vim_regsub_multi(regmmatch_T *rmp, linenr_T lnum, char_u *source, char_u *dest, int copy, int magic, int backslash) -{ - reg_match = NULL; - reg_mmatch = rmp; - reg_buf = curbuf; /* always works on the current buffer! */ - reg_firstlnum = lnum; - reg_maxline = curbuf->b_ml.ml_line_count - lnum; - reg_line_lbr = FALSE; - return vim_regsub_both(source, dest, copy, magic, backslash); -} - -static int vim_regsub_both(char_u *source, char_u *dest, int copy, int magic, int backslash) -{ - char_u *src; - char_u *dst; - char_u *s; - int c; - int cc; - int no = -1; - fptr_T func_all = (fptr_T)NULL; - fptr_T func_one = (fptr_T)NULL; - linenr_T clnum = 0; /* init for GCC */ - int len = 0; /* init for GCC */ - static char_u *eval_result = NULL; - - /* Be paranoid... */ - if (source == NULL || dest == NULL) { - EMSG(_(e_null)); - return 0; - } - if (prog_magic_wrong()) - return 0; - src = source; - dst = dest; - - /* - * When the substitute part starts with "\=" evaluate it as an expression. - */ - if (source[0] == '\\' && source[1] == '=' - && !can_f_submatch /* can't do this recursively */ - ) { - /* To make sure that the length doesn't change between checking the - * length and copying the string, and to speed up things, the - * resulting string is saved from the call with "copy" == FALSE to the - * call with "copy" == TRUE. */ - if (copy) { - if (eval_result != NULL) { - STRCPY(dest, eval_result); - dst += STRLEN(eval_result); - free(eval_result); - eval_result = NULL; - } - } else { - win_T *save_reg_win; - int save_ireg_ic; - - free(eval_result); - - /* The expression may contain substitute(), which calls us - * recursively. Make sure submatch() gets the text from the first - * level. Don't need to save "reg_buf", because - * vim_regexec_multi() can't be called recursively. */ - submatch_match = reg_match; - submatch_mmatch = reg_mmatch; - submatch_firstlnum = reg_firstlnum; - submatch_maxline = reg_maxline; - submatch_line_lbr = reg_line_lbr; - save_reg_win = reg_win; - save_ireg_ic = ireg_ic; - can_f_submatch = TRUE; - - eval_result = eval_to_string(source + 2, NULL, TRUE); - if (eval_result != NULL) { - int had_backslash = FALSE; - - for (s = eval_result; *s != NUL; mb_ptr_adv(s)) { - /* Change NL to CR, so that it becomes a line break, - * unless called from vim_regexec_nl(). - * Skip over a backslashed character. */ - if (*s == NL && !submatch_line_lbr) - *s = CAR; - else if (*s == '\\' && s[1] != NUL) { - ++s; - /* Change NL to CR here too, so that this works: - * :s/abc\\\ndef/\="aaa\\\nbbb"/ on text: - * abc\ - * def - * Not when called from vim_regexec_nl(). - */ - if (*s == NL && !submatch_line_lbr) - *s = CAR; - had_backslash = TRUE; - } - } - if (had_backslash && backslash) { - /* Backslashes will be consumed, need to double them. */ - s = vim_strsave_escaped(eval_result, (char_u *)"\\"); - if (s != NULL) { - free(eval_result); - eval_result = s; - } - } - - dst += STRLEN(eval_result); - } - - reg_match = submatch_match; - reg_mmatch = submatch_mmatch; - reg_firstlnum = submatch_firstlnum; - reg_maxline = submatch_maxline; - reg_line_lbr = submatch_line_lbr; - reg_win = save_reg_win; - ireg_ic = save_ireg_ic; - can_f_submatch = FALSE; - } - } else - while ((c = *src++) != NUL) { - if (c == '&' && magic) - no = 0; - else if (c == '\\' && *src != NUL) { - if (*src == '&' && !magic) { - ++src; - no = 0; - } else if ('0' <= *src && *src <= '9') { - no = *src++ - '0'; - } else if (vim_strchr((char_u *)"uUlLeE", *src)) { - switch (*src++) { - case 'u': func_one = (fptr_T)do_upper; - continue; - case 'U': func_all = (fptr_T)do_Upper; - continue; - case 'l': func_one = (fptr_T)do_lower; - continue; - case 'L': func_all = (fptr_T)do_Lower; - continue; - case 'e': - case 'E': func_one = func_all = (fptr_T)NULL; - continue; - } - } - } - if (no < 0) { /* Ordinary character. */ - if (c == K_SPECIAL && src[0] != NUL && src[1] != NUL) { - /* Copy a special key as-is. */ - if (copy) { - *dst++ = c; - *dst++ = *src++; - *dst++ = *src++; - } else { - dst += 3; - src += 2; - } - continue; - } - - if (c == '\\' && *src != NUL) { - /* Check for abbreviations -- webb */ - switch (*src) { - case 'r': c = CAR; ++src; break; - case 'n': c = NL; ++src; break; - case 't': c = TAB; ++src; break; - /* Oh no! \e already has meaning in subst pat :-( */ - /* case 'e': c = ESC; ++src; break; */ - case 'b': c = Ctrl_H; ++src; break; - - /* If "backslash" is TRUE the backslash will be removed - * later. Used to insert a literal CR. */ - default: if (backslash) { - if (copy) - *dst = '\\'; - ++dst; - } - c = *src++; - } - } else if (has_mbyte) - c = mb_ptr2char(src - 1); - - /* Write to buffer, if copy is set. */ - if (func_one != (fptr_T)NULL) - /* Turbo C complains without the typecast */ - func_one = (fptr_T)(func_one(&cc, c)); - else if (func_all != (fptr_T)NULL) - /* Turbo C complains without the typecast */ - func_all = (fptr_T)(func_all(&cc, c)); - else /* just copy */ - cc = c; - - if (has_mbyte) { - int totlen = mb_ptr2len(src - 1); - - if (copy) - mb_char2bytes(cc, dst); - dst += mb_char2len(cc) - 1; - if (enc_utf8) { - int clen = utf_ptr2len(src - 1); - - /* If the character length is shorter than "totlen", there - * are composing characters; copy them as-is. */ - if (clen < totlen) { - if (copy) - memmove(dst + 1, src - 1 + clen, - (size_t)(totlen - clen)); - dst += totlen - clen; - } - } - src += totlen - 1; - } else if (copy) - *dst = cc; - dst++; - } else { - if (REG_MULTI) { - clnum = reg_mmatch->startpos[no].lnum; - if (clnum < 0 || reg_mmatch->endpos[no].lnum < 0) - s = NULL; - else { - s = reg_getline(clnum) + reg_mmatch->startpos[no].col; - if (reg_mmatch->endpos[no].lnum == clnum) - len = reg_mmatch->endpos[no].col - - reg_mmatch->startpos[no].col; - else - len = (int)STRLEN(s); - } - } else { - s = reg_match->startp[no]; - if (reg_match->endp[no] == NULL) - s = NULL; - else - len = (int)(reg_match->endp[no] - s); - } - if (s != NULL) { - for (;; ) { - if (len == 0) { - if (REG_MULTI) { - if (reg_mmatch->endpos[no].lnum == clnum) - break; - if (copy) - *dst = CAR; - ++dst; - s = reg_getline(++clnum); - if (reg_mmatch->endpos[no].lnum == clnum) - len = reg_mmatch->endpos[no].col; - else - len = (int)STRLEN(s); - } else - break; - } else if (*s == NUL) { /* we hit NUL. */ - if (copy) - EMSG(_(e_re_damg)); - goto exit; - } else { - if (backslash && (*s == CAR || *s == '\\')) { - /* - * Insert a backslash in front of a CR, otherwise - * it will be replaced by a line break. - * Number of backslashes will be halved later, - * double them here. - */ - if (copy) { - dst[0] = '\\'; - dst[1] = *s; - } - dst += 2; - } else { - if (has_mbyte) - c = mb_ptr2char(s); - else - c = *s; - - if (func_one != (fptr_T)NULL) - /* Turbo C complains without the typecast */ - func_one = (fptr_T)(func_one(&cc, c)); - else if (func_all != (fptr_T)NULL) - /* Turbo C complains without the typecast */ - func_all = (fptr_T)(func_all(&cc, c)); - else /* just copy */ - cc = c; - - if (has_mbyte) { - int l; - - /* Copy composing characters separately, one - * at a time. */ - if (enc_utf8) - l = utf_ptr2len(s) - 1; - else - l = mb_ptr2len(s) - 1; - - s += l; - len -= l; - if (copy) - mb_char2bytes(cc, dst); - dst += mb_char2len(cc) - 1; - } else if (copy) - *dst = cc; - dst++; - } - - ++s; - --len; - } - } - } - no = -1; - } - } - if (copy) - *dst = NUL; - -exit: - return (int)((dst - dest) + 1); -} - -static char_u *reg_getline_submatch(linenr_T lnum); - -/* - * Call reg_getline() with the line numbers from the submatch. If a - * substitute() was used the reg_maxline and other values have been - * overwritten. - */ -static char_u *reg_getline_submatch(linenr_T lnum) -{ - char_u *s; - linenr_T save_first = reg_firstlnum; - linenr_T save_max = reg_maxline; - - reg_firstlnum = submatch_firstlnum; - reg_maxline = submatch_maxline; - - s = reg_getline(lnum); - - reg_firstlnum = save_first; - reg_maxline = save_max; - return s; -} - -/* - * Used for the submatch() function: get the string from the n'th submatch in - * allocated memory. - * Returns NULL when not in a ":s" command and for a non-existing submatch. - */ -char_u *reg_submatch(int no) -{ - char_u *retval = NULL; - char_u *s; - int round; - linenr_T lnum; - - if (!can_f_submatch || no < 0) - return NULL; - - if (submatch_match == NULL) { - ssize_t len; - - /* - * First round: compute the length and allocate memory. - * Second round: copy the text. - */ - for (round = 1; round <= 2; ++round) { - lnum = submatch_mmatch->startpos[no].lnum; - if (lnum < 0 || submatch_mmatch->endpos[no].lnum < 0) - return NULL; - - s = reg_getline_submatch(lnum) + submatch_mmatch->startpos[no].col; - if (s == NULL) /* anti-crash check, cannot happen? */ - break; - if (submatch_mmatch->endpos[no].lnum == lnum) { - /* Within one line: take form start to end col. */ - len = submatch_mmatch->endpos[no].col - - submatch_mmatch->startpos[no].col; - if (round == 2) - vim_strncpy(retval, s, len); - ++len; - } else { - /* Multiple lines: take start line from start col, middle - * lines completely and end line up to end col. */ - len = STRLEN(s); - if (round == 2) { - STRCPY(retval, s); - retval[len] = '\n'; - } - ++len; - ++lnum; - while (lnum < submatch_mmatch->endpos[no].lnum) { - s = reg_getline_submatch(lnum++); - if (round == 2) - STRCPY(retval + len, s); - len += STRLEN(s); - if (round == 2) - retval[len] = '\n'; - ++len; - } - if (round == 2) - STRNCPY(retval + len, reg_getline_submatch(lnum), - submatch_mmatch->endpos[no].col); - len += submatch_mmatch->endpos[no].col; - if (round == 2) - retval[len] = NUL; - ++len; - } - - if (retval == NULL) { - retval = xmalloc(len); - } - } - } else { - s = submatch_match->startp[no]; - if (s == NULL || submatch_match->endp[no] == NULL) - retval = NULL; - else - retval = vim_strnsave(s, (int)(submatch_match->endp[no] - s)); - } - - return retval; -} - -// Used for the submatch() function with the optional non-zero argument: get -// the list of strings from the n'th submatch in allocated memory with NULs -// represented in NLs. -// Returns a list of allocated strings. Returns NULL when not in a ":s" -// command, for a non-existing submatch and for any error. -list_T *reg_submatch_list(int no) -{ - if (!can_f_submatch || no < 0) { - return NULL; - } - - linenr_T slnum; - linenr_T elnum; - list_T *list; - char_u *s; - - if (submatch_match == NULL) { - slnum = submatch_mmatch->startpos[no].lnum; - elnum = submatch_mmatch->endpos[no].lnum; - if (slnum < 0 || elnum < 0) { - return NULL; - } - - colnr_T scol = submatch_mmatch->startpos[no].col; - colnr_T ecol = submatch_mmatch->endpos[no].col; - - list = list_alloc(); - - s = reg_getline_submatch(slnum) + scol; - if (slnum == elnum) { - list_append_string(list, s, ecol - scol); - } else { - list_append_string(list, s, -1); - for (int i = 1; i < elnum - slnum; i++) { - s = reg_getline_submatch(slnum + i); - list_append_string(list, s, -1); - } - s = reg_getline_submatch(elnum); - list_append_string(list, s, ecol); - } - } else { - s = submatch_match->startp[no]; - if (s == NULL || submatch_match->endp[no] == NULL) { - return NULL; - } - list = list_alloc(); - list_append_string(list, s, (int)(submatch_match->endp[no] - s)); - } - - return list; -} - -static regengine_T bt_regengine = -{ - bt_regcomp, - bt_regfree, - bt_regexec_nl, - bt_regexec_multi -#ifdef REGEXP_DEBUG - ,(char_u *)"" -#endif -#ifdef DEBUG - ,NULL -#endif -}; - - -#include "regexp_nfa.c" - -static regengine_T nfa_regengine = -{ - nfa_regcomp, - nfa_regfree, - nfa_regexec_nl, - nfa_regexec_multi -#ifdef REGEXP_DEBUG - ,(char_u *)"" -#endif -#ifdef DEBUG - , NULL -#endif -}; - -/* Which regexp engine to use? Needed for vim_regcomp(). - * Must match with 'regexpengine'. */ -static int regexp_engine = 0; -#define AUTOMATIC_ENGINE 0 -#define BACKTRACKING_ENGINE 1 -#define NFA_ENGINE 2 -#ifdef REGEXP_DEBUG -static char_u regname[][30] = { - "AUTOMATIC Regexp Engine", - "BACKTRACKING Regexp Engine", - "NFA Regexp Engine" -}; -#endif - -/* - * Compile a regular expression into internal code. - * Returns the program in allocated memory. - * Use vim_regfree() to free the memory. - * Returns NULL for an error. - */ -regprog_T *vim_regcomp(char_u *expr_arg, int re_flags) -{ - regprog_T *prog = NULL; - char_u *expr = expr_arg; - - regexp_engine = p_re; - - /* Check for prefix "\%#=", that sets the regexp engine */ - if (STRNCMP(expr, "\\%#=", 4) == 0) { - int newengine = expr[4] - '0'; - - if (newengine == AUTOMATIC_ENGINE - || newengine == BACKTRACKING_ENGINE - || newengine == NFA_ENGINE) { - regexp_engine = expr[4] - '0'; - expr += 5; -#ifdef REGEXP_DEBUG - EMSG3("New regexp mode selected (%d): %s", regexp_engine, - regname[newengine]); -#endif - } else { - EMSG(_( - "E864: \\%#= can only be followed by 0, 1, or 2. The automatic engine will be used ")); - regexp_engine = AUTOMATIC_ENGINE; - } - } -#ifdef REGEXP_DEBUG - bt_regengine.expr = expr; - nfa_regengine.expr = expr; -#endif - - /* - * First try the NFA engine, unless backtracking was requested. - */ - if (regexp_engine != BACKTRACKING_ENGINE) - prog = nfa_regengine.regcomp(expr, re_flags); - else - prog = bt_regengine.regcomp(expr, re_flags); - - if (prog == NULL) { /* error compiling regexp with initial engine */ -#ifdef BT_REGEXP_DEBUG_LOG - if (regexp_engine != BACKTRACKING_ENGINE) { /* debugging log for NFA */ - FILE *f; - f = fopen(BT_REGEXP_DEBUG_LOG_NAME, "a"); - if (f) { - fprintf(f, "Syntax error in \"%s\"\n", expr); - fclose(f); - } else - EMSG2("(NFA) Could not open \"%s\" to write !!!", - BT_REGEXP_DEBUG_LOG_NAME); - } -#endif - /* - * If the NFA engine failed, the backtracking engine won't work either. - * - if (regexp_engine == AUTOMATIC_ENGINE) - prog = bt_regengine.regcomp(expr, re_flags); - */ - } - - return prog; -} - -/* - * Free a compiled regexp program, returned by vim_regcomp(). - */ -void vim_regfree(regprog_T *prog) -{ - if (prog != NULL) - prog->engine->regfree(prog); -} - -/* - * Match a regexp against a string. - * "rmp->regprog" is a compiled regexp as returned by vim_regcomp(). - * Uses curbuf for line count and 'iskeyword'. - * - * Return TRUE if there is a match, FALSE if not. - */ -int -vim_regexec ( - regmatch_T *rmp, - char_u *line, /* string to match against */ - colnr_T col /* column to start looking for match */ -) -{ - return rmp->regprog->engine->regexec_nl(rmp, line, col, false); -} - -#if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) \ - || defined(FIND_REPLACE_DIALOG) || defined(PROTO) -/* - * Like vim_regexec(), but consider a "\n" in "line" to be a line break. - */ -int vim_regexec_nl(regmatch_T *rmp, char_u *line, colnr_T col) -{ - return rmp->regprog->engine->regexec_nl(rmp, line, col, true); -} -#endif - -/* - * Match a regexp against multiple lines. - * "rmp->regprog" is a compiled regexp as returned by vim_regcomp(). - * Uses curbuf for line count and 'iskeyword'. - * - * Return zero if there is no match. Return number of lines contained in the - * match otherwise. - */ -long vim_regexec_multi(rmp, win, buf, lnum, col, tm) -regmmatch_T *rmp; -win_T *win; /* window in which to search or NULL */ -buf_T *buf; /* buffer in which to search */ -linenr_T lnum; /* nr of line to start looking for match */ -colnr_T col; /* column to start looking for match */ -proftime_T *tm; /* timeout limit or NULL */ -{ - return rmp->regprog->engine->regexec_multi(rmp, win, buf, lnum, col, tm); -} |