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-rw-r--r--src/nvim/mbyte.c4041
1 files changed, 4041 insertions, 0 deletions
diff --git a/src/nvim/mbyte.c b/src/nvim/mbyte.c
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+++ b/src/nvim/mbyte.c
@@ -0,0 +1,4041 @@
+/*
+ * VIM - Vi IMproved by Bram Moolenaar
+ * Multibyte extensions partly by Sung-Hoon Baek
+ *
+ * Do ":help uganda" in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+/*
+ * mbyte.c: Code specifically for handling multi-byte characters.
+ *
+ * The encoding used in the core is set with 'encoding'. When 'encoding' is
+ * changed, the following four variables are set (for speed).
+ * Currently these types of character encodings are supported:
+ *
+ * "enc_dbcs" When non-zero it tells the type of double byte character
+ * encoding (Chinese, Korean, Japanese, etc.).
+ * The cell width on the display is equal to the number of
+ * bytes. (exception: DBCS_JPNU with first byte 0x8e)
+ * Recognizing the first or second byte is difficult, it
+ * requires checking a byte sequence from the start.
+ * "enc_utf8" When TRUE use Unicode characters in UTF-8 encoding.
+ * The cell width on the display needs to be determined from
+ * the character value.
+ * Recognizing bytes is easy: 0xxx.xxxx is a single-byte
+ * char, 10xx.xxxx is a trailing byte, 11xx.xxxx is a leading
+ * byte of a multi-byte character.
+ * To make things complicated, up to six composing characters
+ * are allowed. These are drawn on top of the first char.
+ * For most editing the sequence of bytes with composing
+ * characters included is considered to be one character.
+ * "enc_unicode" When 2 use 16-bit Unicode characters (or UTF-16).
+ * When 4 use 32-but Unicode characters.
+ * Internally characters are stored in UTF-8 encoding to
+ * avoid NUL bytes. Conversion happens when doing I/O.
+ * "enc_utf8" will also be TRUE.
+ *
+ * "has_mbyte" is set when "enc_dbcs" or "enc_utf8" is non-zero.
+ *
+ * If none of these is TRUE, 8-bit bytes are used for a character. The
+ * encoding isn't currently specified (TODO).
+ *
+ * 'encoding' specifies the encoding used in the core. This is in registers,
+ * text manipulation, buffers, etc. Conversion has to be done when characters
+ * in another encoding are received or send:
+ *
+ * clipboard
+ * ^
+ * | (2)
+ * V
+ * +---------------+
+ * (1) | | (3)
+ * keyboard ----->| core |-----> display
+ * | |
+ * +---------------+
+ * ^
+ * | (4)
+ * V
+ * file
+ *
+ * (1) Typed characters arrive in the current locale. Conversion is to be
+ * done when 'encoding' is different from 'termencoding'.
+ * (2) Text will be made available with the encoding specified with
+ * 'encoding'. If this is not sufficient, system-specific conversion
+ * might be required.
+ * (3) For the GUI the correct font must be selected, no conversion done.
+ * Otherwise, conversion is to be done when 'encoding' differs from
+ * 'termencoding'. (Different in the GTK+ 2 port -- 'termencoding'
+ * is always used for both input and output and must always be set to
+ * "utf-8". gui_mch_init() does this automatically.)
+ * (4) The encoding of the file is specified with 'fileencoding'. Conversion
+ * is to be done when it's different from 'encoding'.
+ *
+ * The viminfo file is a special case: Only text is converted, not file names.
+ * Vim scripts may contain an ":encoding" command. This has an effect for
+ * some commands, like ":menutrans"
+ */
+
+#include <string.h>
+# include <wchar.h>
+
+#include "vim.h"
+#include "mbyte.h"
+#include "charset.h"
+#include "fileio.h"
+#include "memline.h"
+#include "message.h"
+#include "misc1.h"
+#include "misc2.h"
+#include "memory.h"
+#include "option.h"
+#include "screen.h"
+#include "spell.h"
+#include "ui.h"
+#include "os/os.h"
+
+# define WINBYTE BYTE
+
+static int enc_canon_search(char_u *name);
+static int dbcs_char2len(int c);
+static int dbcs_char2bytes(int c, char_u *buf);
+static int dbcs_ptr2len(char_u *p);
+static int dbcs_ptr2len_len(char_u *p, int size);
+static int utf_ptr2cells_len(char_u *p, int size);
+static int dbcs_char2cells(int c);
+static int dbcs_ptr2cells_len(char_u *p, int size);
+static int dbcs_ptr2char(char_u *p);
+static int utf_safe_read_char_adv(char_u **s, size_t *n);
+
+/*
+ * Lookup table to quickly get the length in bytes of a UTF-8 character from
+ * the first byte of a UTF-8 string.
+ * Bytes which are illegal when used as the first byte have a 1.
+ * The NUL byte has length 1.
+ */
+static char utf8len_tab[256] =
+{
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,1,1,
+};
+
+/*
+ * Like utf8len_tab above, but using a zero for illegal lead bytes.
+ */
+static char utf8len_tab_zero[256] =
+{
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 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,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,0,0,
+};
+
+/*
+ * Canonical encoding names and their properties.
+ * "iso-8859-n" is handled by enc_canonize() directly.
+ */
+static struct
+{ char *name; int prop; int codepage; }
+enc_canon_table[] =
+{
+#define IDX_LATIN_1 0
+ {"latin1", ENC_8BIT + ENC_LATIN1, 1252},
+#define IDX_ISO_2 1
+ {"iso-8859-2", ENC_8BIT, 0},
+#define IDX_ISO_3 2
+ {"iso-8859-3", ENC_8BIT, 0},
+#define IDX_ISO_4 3
+ {"iso-8859-4", ENC_8BIT, 0},
+#define IDX_ISO_5 4
+ {"iso-8859-5", ENC_8BIT, 0},
+#define IDX_ISO_6 5
+ {"iso-8859-6", ENC_8BIT, 0},
+#define IDX_ISO_7 6
+ {"iso-8859-7", ENC_8BIT, 0},
+#define IDX_ISO_8 7
+ {"iso-8859-8", ENC_8BIT, 0},
+#define IDX_ISO_9 8
+ {"iso-8859-9", ENC_8BIT, 0},
+#define IDX_ISO_10 9
+ {"iso-8859-10", ENC_8BIT, 0},
+#define IDX_ISO_11 10
+ {"iso-8859-11", ENC_8BIT, 0},
+#define IDX_ISO_13 11
+ {"iso-8859-13", ENC_8BIT, 0},
+#define IDX_ISO_14 12
+ {"iso-8859-14", ENC_8BIT, 0},
+#define IDX_ISO_15 13
+ {"iso-8859-15", ENC_8BIT + ENC_LATIN9, 0},
+#define IDX_KOI8_R 14
+ {"koi8-r", ENC_8BIT, 0},
+#define IDX_KOI8_U 15
+ {"koi8-u", ENC_8BIT, 0},
+#define IDX_UTF8 16
+ {"utf-8", ENC_UNICODE, 0},
+#define IDX_UCS2 17
+ {"ucs-2", ENC_UNICODE + ENC_ENDIAN_B + ENC_2BYTE, 0},
+#define IDX_UCS2LE 18
+ {"ucs-2le", ENC_UNICODE + ENC_ENDIAN_L + ENC_2BYTE, 0},
+#define IDX_UTF16 19
+ {"utf-16", ENC_UNICODE + ENC_ENDIAN_B + ENC_2WORD, 0},
+#define IDX_UTF16LE 20
+ {"utf-16le", ENC_UNICODE + ENC_ENDIAN_L + ENC_2WORD, 0},
+#define IDX_UCS4 21
+ {"ucs-4", ENC_UNICODE + ENC_ENDIAN_B + ENC_4BYTE, 0},
+#define IDX_UCS4LE 22
+ {"ucs-4le", ENC_UNICODE + ENC_ENDIAN_L + ENC_4BYTE, 0},
+
+ /* For debugging DBCS encoding on Unix. */
+#define IDX_DEBUG 23
+ {"debug", ENC_DBCS, DBCS_DEBUG},
+#define IDX_EUC_JP 24
+ {"euc-jp", ENC_DBCS, DBCS_JPNU},
+#define IDX_SJIS 25
+ {"sjis", ENC_DBCS, DBCS_JPN},
+#define IDX_EUC_KR 26
+ {"euc-kr", ENC_DBCS, DBCS_KORU},
+#define IDX_EUC_CN 27
+ {"euc-cn", ENC_DBCS, DBCS_CHSU},
+#define IDX_EUC_TW 28
+ {"euc-tw", ENC_DBCS, DBCS_CHTU},
+#define IDX_BIG5 29
+ {"big5", ENC_DBCS, DBCS_CHT},
+
+ /* MS-DOS and MS-Windows codepages are included here, so that they can be
+ * used on Unix too. Most of them are similar to ISO-8859 encodings, but
+ * not exactly the same. */
+#define IDX_CP437 30
+ {"cp437", ENC_8BIT, 437}, /* like iso-8859-1 */
+#define IDX_CP737 31
+ {"cp737", ENC_8BIT, 737}, /* like iso-8859-7 */
+#define IDX_CP775 32
+ {"cp775", ENC_8BIT, 775}, /* Baltic */
+#define IDX_CP850 33
+ {"cp850", ENC_8BIT, 850}, /* like iso-8859-4 */
+#define IDX_CP852 34
+ {"cp852", ENC_8BIT, 852}, /* like iso-8859-1 */
+#define IDX_CP855 35
+ {"cp855", ENC_8BIT, 855}, /* like iso-8859-2 */
+#define IDX_CP857 36
+ {"cp857", ENC_8BIT, 857}, /* like iso-8859-5 */
+#define IDX_CP860 37
+ {"cp860", ENC_8BIT, 860}, /* like iso-8859-9 */
+#define IDX_CP861 38
+ {"cp861", ENC_8BIT, 861}, /* like iso-8859-1 */
+#define IDX_CP862 39
+ {"cp862", ENC_8BIT, 862}, /* like iso-8859-1 */
+#define IDX_CP863 40
+ {"cp863", ENC_8BIT, 863}, /* like iso-8859-8 */
+#define IDX_CP865 41
+ {"cp865", ENC_8BIT, 865}, /* like iso-8859-1 */
+#define IDX_CP866 42
+ {"cp866", ENC_8BIT, 866}, /* like iso-8859-5 */
+#define IDX_CP869 43
+ {"cp869", ENC_8BIT, 869}, /* like iso-8859-7 */
+#define IDX_CP874 44
+ {"cp874", ENC_8BIT, 874}, /* Thai */
+#define IDX_CP932 45
+ {"cp932", ENC_DBCS, DBCS_JPN},
+#define IDX_CP936 46
+ {"cp936", ENC_DBCS, DBCS_CHS},
+#define IDX_CP949 47
+ {"cp949", ENC_DBCS, DBCS_KOR},
+#define IDX_CP950 48
+ {"cp950", ENC_DBCS, DBCS_CHT},
+#define IDX_CP1250 49
+ {"cp1250", ENC_8BIT, 1250}, /* Czech, Polish, etc. */
+#define IDX_CP1251 50
+ {"cp1251", ENC_8BIT, 1251}, /* Cyrillic */
+ /* cp1252 is considered to be equal to latin1 */
+#define IDX_CP1253 51
+ {"cp1253", ENC_8BIT, 1253}, /* Greek */
+#define IDX_CP1254 52
+ {"cp1254", ENC_8BIT, 1254}, /* Turkish */
+#define IDX_CP1255 53
+ {"cp1255", ENC_8BIT, 1255}, /* Hebrew */
+#define IDX_CP1256 54
+ {"cp1256", ENC_8BIT, 1256}, /* Arabic */
+#define IDX_CP1257 55
+ {"cp1257", ENC_8BIT, 1257}, /* Baltic */
+#define IDX_CP1258 56
+ {"cp1258", ENC_8BIT, 1258}, /* Vietnamese */
+
+#define IDX_MACROMAN 57
+ {"macroman", ENC_8BIT + ENC_MACROMAN, 0}, /* Mac OS */
+#define IDX_DECMCS 58
+ {"dec-mcs", ENC_8BIT, 0}, /* DEC MCS */
+#define IDX_HPROMAN8 59
+ {"hp-roman8", ENC_8BIT, 0}, /* HP Roman8 */
+#define IDX_COUNT 60
+};
+
+/*
+ * Aliases for encoding names.
+ */
+static struct
+{ char *name; int canon; }
+enc_alias_table[] =
+{
+ {"ansi", IDX_LATIN_1},
+ {"iso-8859-1", IDX_LATIN_1},
+ {"latin2", IDX_ISO_2},
+ {"latin3", IDX_ISO_3},
+ {"latin4", IDX_ISO_4},
+ {"cyrillic", IDX_ISO_5},
+ {"arabic", IDX_ISO_6},
+ {"greek", IDX_ISO_7},
+ {"hebrew", IDX_ISO_8},
+ {"latin5", IDX_ISO_9},
+ {"turkish", IDX_ISO_9}, /* ? */
+ {"latin6", IDX_ISO_10},
+ {"nordic", IDX_ISO_10}, /* ? */
+ {"thai", IDX_ISO_11}, /* ? */
+ {"latin7", IDX_ISO_13},
+ {"latin8", IDX_ISO_14},
+ {"latin9", IDX_ISO_15},
+ {"utf8", IDX_UTF8},
+ {"unicode", IDX_UCS2},
+ {"ucs2", IDX_UCS2},
+ {"ucs2be", IDX_UCS2},
+ {"ucs-2be", IDX_UCS2},
+ {"ucs2le", IDX_UCS2LE},
+ {"utf16", IDX_UTF16},
+ {"utf16be", IDX_UTF16},
+ {"utf-16be", IDX_UTF16},
+ {"utf16le", IDX_UTF16LE},
+ {"ucs4", IDX_UCS4},
+ {"ucs4be", IDX_UCS4},
+ {"ucs-4be", IDX_UCS4},
+ {"ucs4le", IDX_UCS4LE},
+ {"utf32", IDX_UCS4},
+ {"utf-32", IDX_UCS4},
+ {"utf32be", IDX_UCS4},
+ {"utf-32be", IDX_UCS4},
+ {"utf32le", IDX_UCS4LE},
+ {"utf-32le", IDX_UCS4LE},
+ {"932", IDX_CP932},
+ {"949", IDX_CP949},
+ {"936", IDX_CP936},
+ {"gbk", IDX_CP936},
+ {"950", IDX_CP950},
+ {"eucjp", IDX_EUC_JP},
+ {"unix-jis", IDX_EUC_JP},
+ {"ujis", IDX_EUC_JP},
+ {"shift-jis", IDX_SJIS},
+ {"euckr", IDX_EUC_KR},
+ {"5601", IDX_EUC_KR}, /* Sun: KS C 5601 */
+ {"euccn", IDX_EUC_CN},
+ {"gb2312", IDX_EUC_CN},
+ {"euctw", IDX_EUC_TW},
+ {"japan", IDX_EUC_JP},
+ {"korea", IDX_EUC_KR},
+ {"prc", IDX_EUC_CN},
+ {"chinese", IDX_EUC_CN},
+ {"taiwan", IDX_EUC_TW},
+ {"cp950", IDX_BIG5},
+ {"950", IDX_BIG5},
+ {"mac", IDX_MACROMAN},
+ {"mac-roman", IDX_MACROMAN},
+ {NULL, 0}
+};
+
+#ifndef CP_UTF8
+# define CP_UTF8 65001 /* magic number from winnls.h */
+#endif
+
+/*
+ * Find encoding "name" in the list of canonical encoding names.
+ * Returns -1 if not found.
+ */
+static int enc_canon_search(char_u *name)
+{
+ int i;
+
+ for (i = 0; i < IDX_COUNT; ++i)
+ if (STRCMP(name, enc_canon_table[i].name) == 0)
+ return i;
+ return -1;
+}
+
+
+
+/*
+ * Find canonical encoding "name" in the list and return its properties.
+ * Returns 0 if not found.
+ */
+int enc_canon_props(char_u *name)
+{
+ int i;
+
+ i = enc_canon_search(name);
+ if (i >= 0)
+ return enc_canon_table[i].prop;
+ if (STRNCMP(name, "2byte-", 6) == 0)
+ return ENC_DBCS;
+ if (STRNCMP(name, "8bit-", 5) == 0 || STRNCMP(name, "iso-8859-", 9) == 0)
+ return ENC_8BIT;
+ return 0;
+}
+
+/*
+ * Set up for using multi-byte characters.
+ * Called in three cases:
+ * - by main() to initialize (p_enc == NULL)
+ * - by set_init_1() after 'encoding' was set to its default.
+ * - by do_set() when 'encoding' has been set.
+ * p_enc must have been passed through enc_canonize() already.
+ * Sets the "enc_unicode", "enc_utf8", "enc_dbcs" and "has_mbyte" flags.
+ * Fills mb_bytelen_tab[] and returns NULL when there are no problems.
+ * When there is something wrong: Returns an error message and doesn't change
+ * anything.
+ */
+char_u * mb_init()
+{
+ int i;
+ int idx;
+ int n;
+ int enc_dbcs_new = 0;
+#if defined(USE_ICONV) && !defined(WIN3264) && !defined(WIN32UNIX) \
+ && !defined(MACOS)
+# define LEN_FROM_CONV
+ vimconv_T vimconv;
+ char_u *p;
+#endif
+
+ if (p_enc == NULL) {
+ /* Just starting up: set the whole table to one's. */
+ for (i = 0; i < 256; ++i)
+ mb_bytelen_tab[i] = 1;
+ input_conv.vc_type = CONV_NONE;
+ input_conv.vc_factor = 1;
+ output_conv.vc_type = CONV_NONE;
+ return NULL;
+ } else if (STRNCMP(p_enc, "8bit-", 5) == 0
+ || STRNCMP(p_enc, "iso-8859-", 9) == 0) {
+ /* Accept any "8bit-" or "iso-8859-" name. */
+ enc_unicode = 0;
+ enc_utf8 = FALSE;
+ } else if (STRNCMP(p_enc, "2byte-", 6) == 0) {
+ /* Unix: accept any "2byte-" name, assume current locale. */
+ enc_dbcs_new = DBCS_2BYTE;
+ } else if ((idx = enc_canon_search(p_enc)) >= 0) {
+ i = enc_canon_table[idx].prop;
+ if (i & ENC_UNICODE) {
+ /* Unicode */
+ enc_utf8 = TRUE;
+ if (i & (ENC_2BYTE | ENC_2WORD))
+ enc_unicode = 2;
+ else if (i & ENC_4BYTE)
+ enc_unicode = 4;
+ else
+ enc_unicode = 0;
+ } else if (i & ENC_DBCS) {
+ /* 2byte, handle below */
+ enc_dbcs_new = enc_canon_table[idx].codepage;
+ } else {
+ /* Must be 8-bit. */
+ enc_unicode = 0;
+ enc_utf8 = FALSE;
+ }
+ } else /* Don't know what encoding this is, reject it. */
+ return e_invarg;
+
+ if (enc_dbcs_new != 0) {
+ enc_unicode = 0;
+ enc_utf8 = FALSE;
+ }
+ enc_dbcs = enc_dbcs_new;
+ has_mbyte = (enc_dbcs != 0 || enc_utf8);
+
+
+ /* Detect an encoding that uses latin1 characters. */
+ enc_latin1like = (enc_utf8 || STRCMP(p_enc, "latin1") == 0
+ || STRCMP(p_enc, "iso-8859-15") == 0);
+
+ /*
+ * Set the function pointers.
+ */
+ if (enc_utf8) {
+ mb_ptr2len = utfc_ptr2len;
+ mb_ptr2len_len = utfc_ptr2len_len;
+ mb_char2len = utf_char2len;
+ mb_char2bytes = utf_char2bytes;
+ mb_ptr2cells = utf_ptr2cells;
+ mb_ptr2cells_len = utf_ptr2cells_len;
+ mb_char2cells = utf_char2cells;
+ mb_off2cells = utf_off2cells;
+ mb_ptr2char = utf_ptr2char;
+ mb_head_off = utf_head_off;
+ } else if (enc_dbcs != 0) {
+ mb_ptr2len = dbcs_ptr2len;
+ mb_ptr2len_len = dbcs_ptr2len_len;
+ mb_char2len = dbcs_char2len;
+ mb_char2bytes = dbcs_char2bytes;
+ mb_ptr2cells = dbcs_ptr2cells;
+ mb_ptr2cells_len = dbcs_ptr2cells_len;
+ mb_char2cells = dbcs_char2cells;
+ mb_off2cells = dbcs_off2cells;
+ mb_ptr2char = dbcs_ptr2char;
+ mb_head_off = dbcs_head_off;
+ } else {
+ mb_ptr2len = latin_ptr2len;
+ mb_ptr2len_len = latin_ptr2len_len;
+ mb_char2len = latin_char2len;
+ mb_char2bytes = latin_char2bytes;
+ mb_ptr2cells = latin_ptr2cells;
+ mb_ptr2cells_len = latin_ptr2cells_len;
+ mb_char2cells = latin_char2cells;
+ mb_off2cells = latin_off2cells;
+ mb_ptr2char = latin_ptr2char;
+ mb_head_off = latin_head_off;
+ }
+
+ /*
+ * Fill the mb_bytelen_tab[] for MB_BYTE2LEN().
+ */
+#ifdef LEN_FROM_CONV
+ /* When 'encoding' is different from the current locale mblen() won't
+ * work. Use conversion to "utf-8" instead. */
+ vimconv.vc_type = CONV_NONE;
+ if (enc_dbcs) {
+ p = enc_locale();
+ if (p == NULL || STRCMP(p, p_enc) != 0) {
+ convert_setup(&vimconv, p_enc, (char_u *)"utf-8");
+ vimconv.vc_fail = TRUE;
+ }
+ free(p);
+ }
+#endif
+
+ for (i = 0; i < 256; ++i) {
+ /* Our own function to reliably check the length of UTF-8 characters,
+ * independent of mblen(). */
+ if (enc_utf8)
+ n = utf8len_tab[i];
+ else if (enc_dbcs == 0)
+ n = 1;
+ else {
+ char buf[MB_MAXBYTES + 1];
+ if (i == NUL) /* just in case mblen() can't handle "" */
+ n = 1;
+ else {
+ buf[0] = i;
+ buf[1] = 0;
+#ifdef LEN_FROM_CONV
+ if (vimconv.vc_type != CONV_NONE) {
+ /*
+ * string_convert() should fail when converting the first
+ * byte of a double-byte character.
+ */
+ p = string_convert(&vimconv, (char_u *)buf, NULL);
+ if (p != NULL) {
+ free(p);
+ n = 1;
+ } else
+ n = 2;
+ } else
+#endif
+ {
+ /*
+ * mblen() should return -1 for invalid (means the leading
+ * multibyte) character. However there are some platforms
+ * where mblen() returns 0 for invalid character.
+ * Therefore, following condition includes 0.
+ */
+ ignored = mblen(NULL, 0); /* First reset the state. */
+ if (mblen(buf, (size_t)1) <= 0)
+ n = 2;
+ else
+ n = 1;
+ }
+ }
+ }
+ mb_bytelen_tab[i] = n;
+ }
+
+#ifdef LEN_FROM_CONV
+ convert_setup(&vimconv, NULL, NULL);
+#endif
+
+ /* The cell width depends on the type of multi-byte characters. */
+ (void)init_chartab();
+
+ /* When enc_utf8 is set or reset, (de)allocate ScreenLinesUC[] */
+ screenalloc(FALSE);
+
+ /* When using Unicode, set default for 'fileencodings'. */
+ if (enc_utf8 && !option_was_set((char_u *)"fencs"))
+ set_string_option_direct((char_u *)"fencs", -1,
+ (char_u *)"ucs-bom,utf-8,default,latin1", OPT_FREE, 0);
+
+#ifdef HAVE_WORKING_LIBINTL
+ /* GNU gettext 0.10.37 supports this feature: set the codeset used for
+ * translated messages independently from the current locale. */
+ (void)bind_textdomain_codeset(VIMPACKAGE,
+ enc_utf8 ? "utf-8" : (char *)p_enc);
+#endif
+
+
+ /* Fire an autocommand to let people do custom font setup. This must be
+ * after Vim has been setup for the new encoding. */
+ apply_autocmds(EVENT_ENCODINGCHANGED, NULL, (char_u *)"", FALSE, curbuf);
+
+ /* Need to reload spell dictionaries */
+ spell_reload();
+
+ return NULL;
+}
+
+/*
+ * Return the size of the BOM for the current buffer:
+ * 0 - no BOM
+ * 2 - UCS-2 or UTF-16 BOM
+ * 4 - UCS-4 BOM
+ * 3 - UTF-8 BOM
+ */
+int bomb_size()
+{
+ int n = 0;
+
+ if (curbuf->b_p_bomb && !curbuf->b_p_bin) {
+ if (*curbuf->b_p_fenc == NUL) {
+ if (enc_utf8) {
+ if (enc_unicode != 0)
+ n = enc_unicode;
+ else
+ n = 3;
+ }
+ } else if (STRCMP(curbuf->b_p_fenc, "utf-8") == 0)
+ n = 3;
+ else if (STRNCMP(curbuf->b_p_fenc, "ucs-2", 5) == 0
+ || STRNCMP(curbuf->b_p_fenc, "utf-16", 6) == 0)
+ n = 2;
+ else if (STRNCMP(curbuf->b_p_fenc, "ucs-4", 5) == 0)
+ n = 4;
+ }
+ return n;
+}
+
+/*
+ * Remove all BOM from "s" by moving remaining text.
+ */
+void remove_bom(char_u *s)
+{
+ if (enc_utf8) {
+ char_u *p = s;
+
+ while ((p = vim_strbyte(p, 0xef)) != NULL) {
+ if (p[1] == 0xbb && p[2] == 0xbf)
+ STRMOVE(p, p + 3);
+ else
+ ++p;
+ }
+ }
+}
+
+/*
+ * Get class of pointer:
+ * 0 for blank or NUL
+ * 1 for punctuation
+ * 2 for an (ASCII) word character
+ * >2 for other word characters
+ */
+int mb_get_class(char_u *p)
+{
+ return mb_get_class_buf(p, curbuf);
+}
+
+int mb_get_class_buf(char_u *p, buf_T *buf)
+{
+ if (MB_BYTE2LEN(p[0]) == 1) {
+ if (p[0] == NUL || vim_iswhite(p[0]))
+ return 0;
+ if (vim_iswordc_buf(p[0], buf))
+ return 2;
+ return 1;
+ }
+ if (enc_dbcs != 0 && p[0] != NUL && p[1] != NUL)
+ return dbcs_class(p[0], p[1]);
+ if (enc_utf8)
+ return utf_class(utf_ptr2char(p));
+ return 0;
+}
+
+/*
+ * Get class of a double-byte character. This always returns 3 or bigger.
+ * TODO: Should return 1 for punctuation.
+ */
+int dbcs_class(unsigned lead, unsigned trail)
+{
+ switch (enc_dbcs) {
+ /* please add classify routine for your language in here */
+
+ case DBCS_JPNU: /* ? */
+ case DBCS_JPN:
+ {
+ /* JIS code classification */
+ unsigned char lb = lead;
+ unsigned char tb = trail;
+
+ /* convert process code to JIS */
+ /*
+ * XXX: Code page identification can not use with all
+ * system! So, some other encoding information
+ * will be needed.
+ * In japanese: SJIS,EUC,UNICODE,(JIS)
+ * Note that JIS-code system don't use as
+ * process code in most system because it uses
+ * escape sequences(JIS is context depend encoding).
+ */
+ /* assume process code is JAPANESE-EUC */
+ lb &= 0x7f;
+ tb &= 0x7f;
+ /* exceptions */
+ switch (lb << 8 | tb) {
+ case 0x2121: /* ZENKAKU space */
+ return 0;
+ case 0x2122: /* TOU-TEN (Japanese comma) */
+ case 0x2123: /* KU-TEN (Japanese period) */
+ case 0x2124: /* ZENKAKU comma */
+ case 0x2125: /* ZENKAKU period */
+ return 1;
+ case 0x213c: /* prolongedsound handled as KATAKANA */
+ return 13;
+ }
+ /* sieved by KU code */
+ switch (lb) {
+ case 0x21:
+ case 0x22:
+ /* special symbols */
+ return 10;
+ case 0x23:
+ /* alpha-numeric */
+ return 11;
+ case 0x24:
+ /* hiragana */
+ return 12;
+ case 0x25:
+ /* katakana */
+ return 13;
+ case 0x26:
+ /* greek */
+ return 14;
+ case 0x27:
+ /* russian */
+ return 15;
+ case 0x28:
+ /* lines */
+ return 16;
+ default:
+ /* kanji */
+ return 17;
+ }
+ }
+
+ case DBCS_KORU: /* ? */
+ case DBCS_KOR:
+ {
+ /* KS code classification */
+ unsigned char c1 = lead;
+ unsigned char c2 = trail;
+
+ /*
+ * 20 : Hangul
+ * 21 : Hanja
+ * 22 : Symbols
+ * 23 : Alpha-numeric/Roman Letter (Full width)
+ * 24 : Hangul Letter(Alphabet)
+ * 25 : Roman Numeral/Greek Letter
+ * 26 : Box Drawings
+ * 27 : Unit Symbols
+ * 28 : Circled/Parenthesized Letter
+ * 29 : Hiragana/Katakana
+ * 30 : Cyrillic Letter
+ */
+
+ if (c1 >= 0xB0 && c1 <= 0xC8)
+ /* Hangul */
+ return 20;
+
+ else if (c1 >= 0xCA && c1 <= 0xFD)
+ /* Hanja */
+ return 21;
+ else switch (c1) {
+ case 0xA1:
+ case 0xA2:
+ /* Symbols */
+ return 22;
+ case 0xA3:
+ /* Alpha-numeric */
+ return 23;
+ case 0xA4:
+ /* Hangul Letter(Alphabet) */
+ return 24;
+ case 0xA5:
+ /* Roman Numeral/Greek Letter */
+ return 25;
+ case 0xA6:
+ /* Box Drawings */
+ return 26;
+ case 0xA7:
+ /* Unit Symbols */
+ return 27;
+ case 0xA8:
+ case 0xA9:
+ if (c2 <= 0xAF)
+ return 25; /* Roman Letter */
+ else if (c2 >= 0xF6)
+ return 22; /* Symbols */
+ else
+ /* Circled/Parenthesized Letter */
+ return 28;
+ case 0xAA:
+ case 0xAB:
+ /* Hiragana/Katakana */
+ return 29;
+ case 0xAC:
+ /* Cyrillic Letter */
+ return 30;
+ }
+ }
+ default:
+ break;
+ }
+ return 3;
+}
+
+/*
+ * mb_char2len() function pointer.
+ * Return length in bytes of character "c".
+ * Returns 1 for a single-byte character.
+ */
+int latin_char2len(int c)
+{
+ return 1;
+}
+
+static int dbcs_char2len(int c)
+{
+ if (c >= 0x100)
+ return 2;
+ return 1;
+}
+
+/*
+ * mb_char2bytes() function pointer.
+ * Convert a character to its bytes.
+ * Returns the length in bytes.
+ */
+int latin_char2bytes(int c, char_u *buf)
+{
+ buf[0] = c;
+ return 1;
+}
+
+static int dbcs_char2bytes(int c, char_u *buf)
+{
+ if (c >= 0x100) {
+ buf[0] = (unsigned)c >> 8;
+ buf[1] = c;
+ /* Never use a NUL byte, it causes lots of trouble. It's an invalid
+ * character anyway. */
+ if (buf[1] == NUL)
+ buf[1] = '\n';
+ return 2;
+ }
+ buf[0] = c;
+ return 1;
+}
+
+/*
+ * mb_ptr2len() function pointer.
+ * Get byte length of character at "*p" but stop at a NUL.
+ * For UTF-8 this includes following composing characters.
+ * Returns 0 when *p is NUL.
+ */
+int latin_ptr2len(char_u *p)
+{
+ return MB_BYTE2LEN(*p);
+}
+
+static int dbcs_ptr2len(char_u *p)
+{
+ int len;
+
+ /* Check if second byte is not missing. */
+ len = MB_BYTE2LEN(*p);
+ if (len == 2 && p[1] == NUL)
+ len = 1;
+ return len;
+}
+
+/*
+ * mb_ptr2len_len() function pointer.
+ * Like mb_ptr2len(), but limit to read "size" bytes.
+ * Returns 0 for an empty string.
+ * Returns 1 for an illegal char or an incomplete byte sequence.
+ */
+int latin_ptr2len_len(char_u *p, int size)
+{
+ if (size < 1 || *p == NUL)
+ return 0;
+ return 1;
+}
+
+static int dbcs_ptr2len_len(char_u *p, int size)
+{
+ int len;
+
+ if (size < 1 || *p == NUL)
+ return 0;
+ if (size == 1)
+ return 1;
+ /* Check that second byte is not missing. */
+ len = MB_BYTE2LEN(*p);
+ if (len == 2 && p[1] == NUL)
+ len = 1;
+ return len;
+}
+
+struct interval {
+ long first;
+ long last;
+};
+static int intable(struct interval *table, size_t size, int c);
+
+/*
+ * Return TRUE if "c" is in "table[size / sizeof(struct interval)]".
+ */
+static int intable(struct interval *table, size_t size, int c)
+{
+ int mid, bot, top;
+
+ /* first quick check for Latin1 etc. characters */
+ if (c < table[0].first)
+ return FALSE;
+
+ /* binary search in table */
+ bot = 0;
+ top = (int)(size / sizeof(struct interval) - 1);
+ while (top >= bot) {
+ mid = (bot + top) / 2;
+ if (table[mid].last < c)
+ bot = mid + 1;
+ else if (table[mid].first > c)
+ top = mid - 1;
+ else
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * For UTF-8 character "c" return 2 for a double-width character, 1 for others.
+ * Returns 4 or 6 for an unprintable character.
+ * Is only correct for characters >= 0x80.
+ * When p_ambw is "double", return 2 for a character with East Asian Width
+ * class 'A'(mbiguous).
+ */
+int utf_char2cells(int c)
+{
+ /* Sorted list of non-overlapping intervals of East Asian double width
+ * characters, generated with ../runtime/tools/unicode.vim. */
+ static struct interval doublewidth[] =
+ {
+ {0x1100, 0x115f},
+ {0x11a3, 0x11a7},
+ {0x11fa, 0x11ff},
+ {0x2329, 0x232a},
+ {0x2e80, 0x2e99},
+ {0x2e9b, 0x2ef3},
+ {0x2f00, 0x2fd5},
+ {0x2ff0, 0x2ffb},
+ {0x3000, 0x3029},
+ {0x3030, 0x303e},
+ {0x3041, 0x3096},
+ {0x309b, 0x30ff},
+ {0x3105, 0x312d},
+ {0x3131, 0x318e},
+ {0x3190, 0x31b7},
+ {0x31c0, 0x31e3},
+ {0x31f0, 0x321e},
+ {0x3220, 0x3247},
+ {0x3250, 0x32fe},
+ {0x3300, 0x4dbf},
+ {0x4e00, 0xa48c},
+ {0xa490, 0xa4c6},
+ {0xa960, 0xa97c},
+ {0xac00, 0xd7a3},
+ {0xd7b0, 0xd7c6},
+ {0xd7cb, 0xd7fb},
+ {0xf900, 0xfaff},
+ {0xfe10, 0xfe19},
+ {0xfe30, 0xfe52},
+ {0xfe54, 0xfe66},
+ {0xfe68, 0xfe6b},
+ {0xff01, 0xff60},
+ {0xffe0, 0xffe6},
+ {0x1f200, 0x1f200},
+ {0x1f210, 0x1f231},
+ {0x1f240, 0x1f248},
+ {0x20000, 0x2fffd},
+ {0x30000, 0x3fffd}
+ };
+ /* Sorted list of non-overlapping intervals of East Asian Ambiguous
+ * characters, generated with ../runtime/tools/unicode.vim. */
+ static struct interval ambiguous[] =
+ {
+ {0x00a1, 0x00a1},
+ {0x00a4, 0x00a4},
+ {0x00a7, 0x00a8},
+ {0x00aa, 0x00aa},
+ {0x00ad, 0x00ae},
+ {0x00b0, 0x00b4},
+ {0x00b6, 0x00ba},
+ {0x00bc, 0x00bf},
+ {0x00c6, 0x00c6},
+ {0x00d0, 0x00d0},
+ {0x00d7, 0x00d8},
+ {0x00de, 0x00e1},
+ {0x00e6, 0x00e6},
+ {0x00e8, 0x00ea},
+ {0x00ec, 0x00ed},
+ {0x00f0, 0x00f0},
+ {0x00f2, 0x00f3},
+ {0x00f7, 0x00fa},
+ {0x00fc, 0x00fc},
+ {0x00fe, 0x00fe},
+ {0x0101, 0x0101},
+ {0x0111, 0x0111},
+ {0x0113, 0x0113},
+ {0x011b, 0x011b},
+ {0x0126, 0x0127},
+ {0x012b, 0x012b},
+ {0x0131, 0x0133},
+ {0x0138, 0x0138},
+ {0x013f, 0x0142},
+ {0x0144, 0x0144},
+ {0x0148, 0x014b},
+ {0x014d, 0x014d},
+ {0x0152, 0x0153},
+ {0x0166, 0x0167},
+ {0x016b, 0x016b},
+ {0x01ce, 0x01ce},
+ {0x01d0, 0x01d0},
+ {0x01d2, 0x01d2},
+ {0x01d4, 0x01d4},
+ {0x01d6, 0x01d6},
+ {0x01d8, 0x01d8},
+ {0x01da, 0x01da},
+ {0x01dc, 0x01dc},
+ {0x0251, 0x0251},
+ {0x0261, 0x0261},
+ {0x02c4, 0x02c4},
+ {0x02c7, 0x02c7},
+ {0x02c9, 0x02cb},
+ {0x02cd, 0x02cd},
+ {0x02d0, 0x02d0},
+ {0x02d8, 0x02db},
+ {0x02dd, 0x02dd},
+ {0x02df, 0x02df},
+ {0x0391, 0x03a1},
+ {0x03a3, 0x03a9},
+ {0x03b1, 0x03c1},
+ {0x03c3, 0x03c9},
+ {0x0401, 0x0401},
+ {0x0410, 0x044f},
+ {0x0451, 0x0451},
+ {0x2010, 0x2010},
+ {0x2013, 0x2016},
+ {0x2018, 0x2019},
+ {0x201c, 0x201d},
+ {0x2020, 0x2022},
+ {0x2024, 0x2027},
+ {0x2030, 0x2030},
+ {0x2032, 0x2033},
+ {0x2035, 0x2035},
+ {0x203b, 0x203b},
+ {0x203e, 0x203e},
+ {0x2074, 0x2074},
+ {0x207f, 0x207f},
+ {0x2081, 0x2084},
+ {0x20ac, 0x20ac},
+ {0x2103, 0x2103},
+ {0x2105, 0x2105},
+ {0x2109, 0x2109},
+ {0x2113, 0x2113},
+ {0x2116, 0x2116},
+ {0x2121, 0x2122},
+ {0x2126, 0x2126},
+ {0x212b, 0x212b},
+ {0x2153, 0x2154},
+ {0x215b, 0x215e},
+ {0x2160, 0x216b},
+ {0x2170, 0x2179},
+ {0x2189, 0x2189},
+ {0x2190, 0x2199},
+ {0x21b8, 0x21b9},
+ {0x21d2, 0x21d2},
+ {0x21d4, 0x21d4},
+ {0x21e7, 0x21e7},
+ {0x2200, 0x2200},
+ {0x2202, 0x2203},
+ {0x2207, 0x2208},
+ {0x220b, 0x220b},
+ {0x220f, 0x220f},
+ {0x2211, 0x2211},
+ {0x2215, 0x2215},
+ {0x221a, 0x221a},
+ {0x221d, 0x2220},
+ {0x2223, 0x2223},
+ {0x2225, 0x2225},
+ {0x2227, 0x222c},
+ {0x222e, 0x222e},
+ {0x2234, 0x2237},
+ {0x223c, 0x223d},
+ {0x2248, 0x2248},
+ {0x224c, 0x224c},
+ {0x2252, 0x2252},
+ {0x2260, 0x2261},
+ {0x2264, 0x2267},
+ {0x226a, 0x226b},
+ {0x226e, 0x226f},
+ {0x2282, 0x2283},
+ {0x2286, 0x2287},
+ {0x2295, 0x2295},
+ {0x2299, 0x2299},
+ {0x22a5, 0x22a5},
+ {0x22bf, 0x22bf},
+ {0x2312, 0x2312},
+ {0x2460, 0x24e9},
+ {0x24eb, 0x254b},
+ {0x2550, 0x2573},
+ {0x2580, 0x258f},
+ {0x2592, 0x2595},
+ {0x25a0, 0x25a1},
+ {0x25a3, 0x25a9},
+ {0x25b2, 0x25b3},
+ {0x25b6, 0x25b7},
+ {0x25bc, 0x25bd},
+ {0x25c0, 0x25c1},
+ {0x25c6, 0x25c8},
+ {0x25cb, 0x25cb},
+ {0x25ce, 0x25d1},
+ {0x25e2, 0x25e5},
+ {0x25ef, 0x25ef},
+ {0x2605, 0x2606},
+ {0x2609, 0x2609},
+ {0x260e, 0x260f},
+ {0x2614, 0x2615},
+ {0x261c, 0x261c},
+ {0x261e, 0x261e},
+ {0x2640, 0x2640},
+ {0x2642, 0x2642},
+ {0x2660, 0x2661},
+ {0x2663, 0x2665},
+ {0x2667, 0x266a},
+ {0x266c, 0x266d},
+ {0x266f, 0x266f},
+ {0x269e, 0x269f},
+ {0x26be, 0x26bf},
+ {0x26c4, 0x26cd},
+ {0x26cf, 0x26e1},
+ {0x26e3, 0x26e3},
+ {0x26e8, 0x26ff},
+ {0x273d, 0x273d},
+ {0x2757, 0x2757},
+ {0x2776, 0x277f},
+ {0x2b55, 0x2b59},
+ {0x3248, 0x324f},
+ {0xe000, 0xf8ff},
+ {0xfffd, 0xfffd},
+ {0x1f100, 0x1f10a},
+ {0x1f110, 0x1f12d},
+ {0x1f131, 0x1f131},
+ {0x1f13d, 0x1f13d},
+ {0x1f13f, 0x1f13f},
+ {0x1f142, 0x1f142},
+ {0x1f146, 0x1f146},
+ {0x1f14a, 0x1f14e},
+ {0x1f157, 0x1f157},
+ {0x1f15f, 0x1f15f},
+ {0x1f179, 0x1f179},
+ {0x1f17b, 0x1f17c},
+ {0x1f17f, 0x1f17f},
+ {0x1f18a, 0x1f18d},
+ {0x1f190, 0x1f190},
+ {0xf0000, 0xffffd},
+ {0x100000, 0x10fffd}
+ };
+
+ if (c >= 0x100) {
+#ifdef USE_WCHAR_FUNCTIONS
+ /*
+ * Assume the library function wcwidth() works better than our own
+ * stuff. It should return 1 for ambiguous width chars!
+ */
+ int n = wcwidth(c);
+
+ if (n < 0)
+ return 6; /* unprintable, displays <xxxx> */
+ if (n > 1)
+ return n;
+#else
+ if (!utf_printable(c))
+ return 6; /* unprintable, displays <xxxx> */
+ if (intable(doublewidth, sizeof(doublewidth), c))
+ return 2;
+#endif
+ }
+ /* Characters below 0x100 are influenced by 'isprint' option */
+ else if (c >= 0x80 && !vim_isprintc(c))
+ return 4; /* unprintable, displays <xx> */
+
+ if (c >= 0x80 && *p_ambw == 'd' && intable(ambiguous, sizeof(ambiguous), c))
+ return 2;
+
+ return 1;
+}
+
+/*
+ * mb_ptr2cells() function pointer.
+ * Return the number of display cells character at "*p" occupies.
+ * This doesn't take care of unprintable characters, use ptr2cells() for that.
+ */
+int latin_ptr2cells(char_u *p)
+{
+ return 1;
+}
+
+int utf_ptr2cells(char_u *p)
+{
+ int c;
+
+ /* Need to convert to a wide character. */
+ if (*p >= 0x80) {
+ c = utf_ptr2char(p);
+ /* An illegal byte is displayed as <xx>. */
+ if (utf_ptr2len(p) == 1 || c == NUL)
+ return 4;
+ /* If the char is ASCII it must be an overlong sequence. */
+ if (c < 0x80)
+ return char2cells(c);
+ return utf_char2cells(c);
+ }
+ return 1;
+}
+
+int dbcs_ptr2cells(char_u *p)
+{
+ /* Number of cells is equal to number of bytes, except for euc-jp when
+ * the first byte is 0x8e. */
+ if (enc_dbcs == DBCS_JPNU && *p == 0x8e)
+ return 1;
+ return MB_BYTE2LEN(*p);
+}
+
+/*
+ * mb_ptr2cells_len() function pointer.
+ * Like mb_ptr2cells(), but limit string length to "size".
+ * For an empty string or truncated character returns 1.
+ */
+int latin_ptr2cells_len(char_u *p, int size)
+{
+ return 1;
+}
+
+static int utf_ptr2cells_len(char_u *p, int size)
+{
+ int c;
+
+ /* Need to convert to a wide character. */
+ if (size > 0 && *p >= 0x80) {
+ if (utf_ptr2len_len(p, size) < utf8len_tab[*p])
+ return 1; /* truncated */
+ c = utf_ptr2char(p);
+ /* An illegal byte is displayed as <xx>. */
+ if (utf_ptr2len(p) == 1 || c == NUL)
+ return 4;
+ /* If the char is ASCII it must be an overlong sequence. */
+ if (c < 0x80)
+ return char2cells(c);
+ return utf_char2cells(c);
+ }
+ return 1;
+}
+
+static int dbcs_ptr2cells_len(char_u *p, int size)
+{
+ /* Number of cells is equal to number of bytes, except for euc-jp when
+ * the first byte is 0x8e. */
+ if (size <= 1 || (enc_dbcs == DBCS_JPNU && *p == 0x8e))
+ return 1;
+ return MB_BYTE2LEN(*p);
+}
+
+/*
+ * mb_char2cells() function pointer.
+ * Return the number of display cells character "c" occupies.
+ * Only takes care of multi-byte chars, not "^C" and such.
+ */
+int latin_char2cells(int c)
+{
+ return 1;
+}
+
+static int dbcs_char2cells(int c)
+{
+ /* Number of cells is equal to number of bytes, except for euc-jp when
+ * the first byte is 0x8e. */
+ if (enc_dbcs == DBCS_JPNU && ((unsigned)c >> 8) == 0x8e)
+ return 1;
+ /* use the first byte */
+ return MB_BYTE2LEN((unsigned)c >> 8);
+}
+
+/*
+ * Return the number of cells occupied by string "p".
+ * Stop at a NUL character. When "len" >= 0 stop at character "p[len]".
+ */
+int mb_string2cells(char_u *p, int len)
+{
+ int i;
+ int clen = 0;
+
+ for (i = 0; (len < 0 || i < len) && p[i] != NUL; i += (*mb_ptr2len)(p + i))
+ clen += (*mb_ptr2cells)(p + i);
+ return clen;
+}
+
+/*
+ * mb_off2cells() function pointer.
+ * Return number of display cells for char at ScreenLines[off].
+ * We make sure that the offset used is less than "max_off".
+ */
+int latin_off2cells(unsigned off, unsigned max_off)
+{
+ return 1;
+}
+
+int dbcs_off2cells(unsigned off, unsigned max_off)
+{
+ /* never check beyond end of the line */
+ if (off >= max_off)
+ return 1;
+
+ /* Number of cells is equal to number of bytes, except for euc-jp when
+ * the first byte is 0x8e. */
+ if (enc_dbcs == DBCS_JPNU && ScreenLines[off] == 0x8e)
+ return 1;
+ return MB_BYTE2LEN(ScreenLines[off]);
+}
+
+int utf_off2cells(unsigned off, unsigned max_off)
+{
+ return (off + 1 < max_off && ScreenLines[off + 1] == 0) ? 2 : 1;
+}
+
+/*
+ * mb_ptr2char() function pointer.
+ * Convert a byte sequence into a character.
+ */
+int latin_ptr2char(char_u *p)
+{
+ return *p;
+}
+
+static int dbcs_ptr2char(char_u *p)
+{
+ if (MB_BYTE2LEN(*p) > 1 && p[1] != NUL)
+ return (p[0] << 8) + p[1];
+ return *p;
+}
+
+/*
+ * Convert a UTF-8 byte sequence to a wide character.
+ * If the sequence is illegal or truncated by a NUL the first byte is
+ * returned.
+ * Does not include composing characters, of course.
+ */
+int utf_ptr2char(char_u *p)
+{
+ int len;
+
+ if (p[0] < 0x80) /* be quick for ASCII */
+ return p[0];
+
+ len = utf8len_tab_zero[p[0]];
+ if (len > 1 && (p[1] & 0xc0) == 0x80) {
+ if (len == 2)
+ return ((p[0] & 0x1f) << 6) + (p[1] & 0x3f);
+ if ((p[2] & 0xc0) == 0x80) {
+ if (len == 3)
+ return ((p[0] & 0x0f) << 12) + ((p[1] & 0x3f) << 6)
+ + (p[2] & 0x3f);
+ if ((p[3] & 0xc0) == 0x80) {
+ if (len == 4)
+ return ((p[0] & 0x07) << 18) + ((p[1] & 0x3f) << 12)
+ + ((p[2] & 0x3f) << 6) + (p[3] & 0x3f);
+ if ((p[4] & 0xc0) == 0x80) {
+ if (len == 5)
+ return ((p[0] & 0x03) << 24) + ((p[1] & 0x3f) << 18)
+ + ((p[2] & 0x3f) << 12) + ((p[3] & 0x3f) << 6)
+ + (p[4] & 0x3f);
+ if ((p[5] & 0xc0) == 0x80 && len == 6)
+ return ((p[0] & 0x01) << 30) + ((p[1] & 0x3f) << 24)
+ + ((p[2] & 0x3f) << 18) + ((p[3] & 0x3f) << 12)
+ + ((p[4] & 0x3f) << 6) + (p[5] & 0x3f);
+ }
+ }
+ }
+ }
+ /* Illegal value, just return the first byte */
+ return p[0];
+}
+
+/*
+ * Convert a UTF-8 byte sequence to a wide character.
+ * String is assumed to be terminated by NUL or after "n" bytes, whichever
+ * comes first.
+ * The function is safe in the sense that it never accesses memory beyond the
+ * first "n" bytes of "s".
+ *
+ * On success, returns decoded codepoint, advances "s" to the beginning of
+ * next character and decreases "n" accordingly.
+ *
+ * If end of string was reached, returns 0 and, if "n" > 0, advances "s" past
+ * NUL byte.
+ *
+ * If byte sequence is illegal or incomplete, returns -1 and does not advance
+ * "s".
+ */
+static int utf_safe_read_char_adv(char_u **s, size_t *n)
+{
+ int c, k;
+
+ if (*n == 0) /* end of buffer */
+ return 0;
+
+ k = utf8len_tab_zero[**s];
+
+ if (k == 1) {
+ /* ASCII character or NUL */
+ (*n)--;
+ return *(*s)++;
+ }
+
+ if ((size_t)k <= *n) {
+ /* We have a multibyte sequence and it isn't truncated by buffer
+ * limits so utf_ptr2char() is safe to use. Or the first byte is
+ * illegal (k=0), and it's also safe to use utf_ptr2char(). */
+ c = utf_ptr2char(*s);
+
+ /* On failure, utf_ptr2char() returns the first byte, so here we
+ * check equality with the first byte. The only non-ASCII character
+ * which equals the first byte of its own UTF-8 representation is
+ * U+00C3 (UTF-8: 0xC3 0x83), so need to check that special case too.
+ * It's safe even if n=1, else we would have k=2 > n. */
+ if (c != (int)(**s) || (c == 0xC3 && (*s)[1] == 0x83)) {
+ /* byte sequence was successfully decoded */
+ *s += k;
+ *n -= k;
+ return c;
+ }
+ }
+
+ /* byte sequence is incomplete or illegal */
+ return -1;
+}
+
+/*
+ * Get character at **pp and advance *pp to the next character.
+ * Note: composing characters are skipped!
+ */
+int mb_ptr2char_adv(char_u **pp)
+{
+ int c;
+
+ c = (*mb_ptr2char)(*pp);
+ *pp += (*mb_ptr2len)(*pp);
+ return c;
+}
+
+/*
+ * Get character at **pp and advance *pp to the next character.
+ * Note: composing characters are returned as separate characters.
+ */
+int mb_cptr2char_adv(char_u **pp)
+{
+ int c;
+
+ c = (*mb_ptr2char)(*pp);
+ if (enc_utf8)
+ *pp += utf_ptr2len(*pp);
+ else
+ *pp += (*mb_ptr2len)(*pp);
+ return c;
+}
+
+/*
+ * Check if the character pointed to by "p2" is a composing character when it
+ * comes after "p1". For Arabic sometimes "ab" is replaced with "c", which
+ * behaves like a composing character.
+ */
+int utf_composinglike(char_u *p1, char_u *p2)
+{
+ int c2;
+
+ c2 = utf_ptr2char(p2);
+ if (utf_iscomposing(c2))
+ return TRUE;
+ if (!arabic_maycombine(c2))
+ return FALSE;
+ return arabic_combine(utf_ptr2char(p1), c2);
+}
+
+/*
+ * Convert a UTF-8 byte string to a wide character. Also get up to MAX_MCO
+ * composing characters.
+ */
+int utfc_ptr2char(
+ char_u *p,
+ int *pcc /* return: composing chars, last one is 0 */
+ )
+{
+ int len;
+ int c;
+ int cc;
+ int i = 0;
+
+ c = utf_ptr2char(p);
+ len = utf_ptr2len(p);
+
+ /* Only accept a composing char when the first char isn't illegal. */
+ if ((len > 1 || *p < 0x80)
+ && p[len] >= 0x80
+ && UTF_COMPOSINGLIKE(p, p + len)) {
+ cc = utf_ptr2char(p + len);
+ for (;; ) {
+ pcc[i++] = cc;
+ if (i == MAX_MCO)
+ break;
+ len += utf_ptr2len(p + len);
+ if (p[len] < 0x80 || !utf_iscomposing(cc = utf_ptr2char(p + len)))
+ break;
+ }
+ }
+
+ if (i < MAX_MCO) /* last composing char must be 0 */
+ pcc[i] = 0;
+
+ return c;
+}
+
+/*
+ * Convert a UTF-8 byte string to a wide character. Also get up to MAX_MCO
+ * composing characters. Use no more than p[maxlen].
+ */
+int utfc_ptr2char_len(
+ char_u *p,
+ int *pcc, /* return: composing chars, last one is 0 */
+ int maxlen
+ )
+{
+ int len;
+ int c;
+ int cc;
+ int i = 0;
+
+ c = utf_ptr2char(p);
+ len = utf_ptr2len_len(p, maxlen);
+ /* Only accept a composing char when the first char isn't illegal. */
+ if ((len > 1 || *p < 0x80)
+ && len < maxlen
+ && p[len] >= 0x80
+ && UTF_COMPOSINGLIKE(p, p + len)) {
+ cc = utf_ptr2char(p + len);
+ for (;; ) {
+ pcc[i++] = cc;
+ if (i == MAX_MCO)
+ break;
+ len += utf_ptr2len_len(p + len, maxlen - len);
+ if (len >= maxlen
+ || p[len] < 0x80
+ || !utf_iscomposing(cc = utf_ptr2char(p + len)))
+ break;
+ }
+ }
+
+ if (i < MAX_MCO) /* last composing char must be 0 */
+ pcc[i] = 0;
+
+ return c;
+}
+
+/*
+ * Convert the character at screen position "off" to a sequence of bytes.
+ * Includes the composing characters.
+ * "buf" must at least have the length MB_MAXBYTES + 1.
+ * Only to be used when ScreenLinesUC[off] != 0.
+ * Returns the produced number of bytes.
+ */
+int utfc_char2bytes(int off, char_u *buf)
+{
+ int len;
+ int i;
+
+ len = utf_char2bytes(ScreenLinesUC[off], buf);
+ for (i = 0; i < Screen_mco; ++i) {
+ if (ScreenLinesC[i][off] == 0)
+ break;
+ len += utf_char2bytes(ScreenLinesC[i][off], buf + len);
+ }
+ return len;
+}
+
+/*
+ * Get the length of a UTF-8 byte sequence, not including any following
+ * composing characters.
+ * Returns 0 for "".
+ * Returns 1 for an illegal byte sequence.
+ */
+int utf_ptr2len(char_u *p)
+{
+ int len;
+ int i;
+
+ if (*p == NUL)
+ return 0;
+ len = utf8len_tab[*p];
+ for (i = 1; i < len; ++i)
+ if ((p[i] & 0xc0) != 0x80)
+ return 1;
+ return len;
+}
+
+/*
+ * Return length of UTF-8 character, obtained from the first byte.
+ * "b" must be between 0 and 255!
+ * Returns 1 for an invalid first byte value.
+ */
+int utf_byte2len(int b)
+{
+ return utf8len_tab[b];
+}
+
+/*
+ * Get the length of UTF-8 byte sequence "p[size]". Does not include any
+ * following composing characters.
+ * Returns 1 for "".
+ * Returns 1 for an illegal byte sequence (also in incomplete byte seq.).
+ * Returns number > "size" for an incomplete byte sequence.
+ * Never returns zero.
+ */
+int utf_ptr2len_len(char_u *p, int size)
+{
+ int len;
+ int i;
+ int m;
+
+ len = utf8len_tab[*p];
+ if (len == 1)
+ return 1; /* NUL, ascii or illegal lead byte */
+ if (len > size)
+ m = size; /* incomplete byte sequence. */
+ else
+ m = len;
+ for (i = 1; i < m; ++i)
+ if ((p[i] & 0xc0) != 0x80)
+ return 1;
+ return len;
+}
+
+/*
+ * Return the number of bytes the UTF-8 encoding of the character at "p" takes.
+ * This includes following composing characters.
+ */
+int utfc_ptr2len(char_u *p)
+{
+ int len;
+ int b0 = *p;
+ int prevlen;
+
+ if (b0 == NUL)
+ return 0;
+ if (b0 < 0x80 && p[1] < 0x80) /* be quick for ASCII */
+ return 1;
+
+ /* Skip over first UTF-8 char, stopping at a NUL byte. */
+ len = utf_ptr2len(p);
+
+ /* Check for illegal byte. */
+ if (len == 1 && b0 >= 0x80)
+ return 1;
+
+ /*
+ * Check for composing characters. We can handle only the first six, but
+ * skip all of them (otherwise the cursor would get stuck).
+ */
+ prevlen = 0;
+ for (;; ) {
+ if (p[len] < 0x80 || !UTF_COMPOSINGLIKE(p + prevlen, p + len))
+ return len;
+
+ /* Skip over composing char */
+ prevlen = len;
+ len += utf_ptr2len(p + len);
+ }
+}
+
+/*
+ * Return the number of bytes the UTF-8 encoding of the character at "p[size]"
+ * takes. This includes following composing characters.
+ * Returns 0 for an empty string.
+ * Returns 1 for an illegal char or an incomplete byte sequence.
+ */
+int utfc_ptr2len_len(char_u *p, int size)
+{
+ int len;
+ int prevlen;
+
+ if (size < 1 || *p == NUL)
+ return 0;
+ if (p[0] < 0x80 && (size == 1 || p[1] < 0x80)) /* be quick for ASCII */
+ return 1;
+
+ /* Skip over first UTF-8 char, stopping at a NUL byte. */
+ len = utf_ptr2len_len(p, size);
+
+ /* Check for illegal byte and incomplete byte sequence. */
+ if ((len == 1 && p[0] >= 0x80) || len > size)
+ return 1;
+
+ /*
+ * Check for composing characters. We can handle only the first six, but
+ * skip all of them (otherwise the cursor would get stuck).
+ */
+ prevlen = 0;
+ while (len < size) {
+ int len_next_char;
+
+ if (p[len] < 0x80)
+ break;
+
+ /*
+ * Next character length should not go beyond size to ensure that
+ * UTF_COMPOSINGLIKE(...) does not read beyond size.
+ */
+ len_next_char = utf_ptr2len_len(p + len, size - len);
+ if (len_next_char > size - len)
+ break;
+
+ if (!UTF_COMPOSINGLIKE(p + prevlen, p + len))
+ break;
+
+ /* Skip over composing char */
+ prevlen = len;
+ len += len_next_char;
+ }
+ return len;
+}
+
+/*
+ * Return the number of bytes the UTF-8 encoding of character "c" takes.
+ * This does not include composing characters.
+ */
+int utf_char2len(int c)
+{
+ if (c < 0x80)
+ return 1;
+ if (c < 0x800)
+ return 2;
+ if (c < 0x10000)
+ return 3;
+ if (c < 0x200000)
+ return 4;
+ if (c < 0x4000000)
+ return 5;
+ return 6;
+}
+
+/*
+ * Convert Unicode character "c" to UTF-8 string in "buf[]".
+ * Returns the number of bytes.
+ * This does not include composing characters.
+ */
+int utf_char2bytes(int c, char_u *buf)
+{
+ if (c < 0x80) { /* 7 bits */
+ buf[0] = c;
+ return 1;
+ }
+ if (c < 0x800) { /* 11 bits */
+ buf[0] = 0xc0 + ((unsigned)c >> 6);
+ buf[1] = 0x80 + (c & 0x3f);
+ return 2;
+ }
+ if (c < 0x10000) { /* 16 bits */
+ buf[0] = 0xe0 + ((unsigned)c >> 12);
+ buf[1] = 0x80 + (((unsigned)c >> 6) & 0x3f);
+ buf[2] = 0x80 + (c & 0x3f);
+ return 3;
+ }
+ if (c < 0x200000) { /* 21 bits */
+ buf[0] = 0xf0 + ((unsigned)c >> 18);
+ buf[1] = 0x80 + (((unsigned)c >> 12) & 0x3f);
+ buf[2] = 0x80 + (((unsigned)c >> 6) & 0x3f);
+ buf[3] = 0x80 + (c & 0x3f);
+ return 4;
+ }
+ if (c < 0x4000000) { /* 26 bits */
+ buf[0] = 0xf8 + ((unsigned)c >> 24);
+ buf[1] = 0x80 + (((unsigned)c >> 18) & 0x3f);
+ buf[2] = 0x80 + (((unsigned)c >> 12) & 0x3f);
+ buf[3] = 0x80 + (((unsigned)c >> 6) & 0x3f);
+ buf[4] = 0x80 + (c & 0x3f);
+ return 5;
+ }
+ /* 31 bits */
+ buf[0] = 0xfc + ((unsigned)c >> 30);
+ buf[1] = 0x80 + (((unsigned)c >> 24) & 0x3f);
+ buf[2] = 0x80 + (((unsigned)c >> 18) & 0x3f);
+ buf[3] = 0x80 + (((unsigned)c >> 12) & 0x3f);
+ buf[4] = 0x80 + (((unsigned)c >> 6) & 0x3f);
+ buf[5] = 0x80 + (c & 0x3f);
+ return 6;
+}
+
+/*
+ * Return TRUE if "c" is a composing UTF-8 character. This means it will be
+ * drawn on top of the preceding character.
+ * Based on code from Markus Kuhn.
+ */
+int utf_iscomposing(int c)
+{
+ /* Sorted list of non-overlapping intervals.
+ * Generated by ../runtime/tools/unicode.vim. */
+ static struct interval combining[] =
+ {
+ {0x0300, 0x036f},
+ {0x0483, 0x0489},
+ {0x0591, 0x05bd},
+ {0x05bf, 0x05bf},
+ {0x05c1, 0x05c2},
+ {0x05c4, 0x05c5},
+ {0x05c7, 0x05c7},
+ {0x0610, 0x061a},
+ {0x064b, 0x065e},
+ {0x0670, 0x0670},
+ {0x06d6, 0x06dc},
+ {0x06de, 0x06e4},
+ {0x06e7, 0x06e8},
+ {0x06ea, 0x06ed},
+ {0x0711, 0x0711},
+ {0x0730, 0x074a},
+ {0x07a6, 0x07b0},
+ {0x07eb, 0x07f3},
+ {0x0816, 0x0819},
+ {0x081b, 0x0823},
+ {0x0825, 0x0827},
+ {0x0829, 0x082d},
+ {0x0900, 0x0903},
+ {0x093c, 0x093c},
+ {0x093e, 0x094e},
+ {0x0951, 0x0955},
+ {0x0962, 0x0963},
+ {0x0981, 0x0983},
+ {0x09bc, 0x09bc},
+ {0x09be, 0x09c4},
+ {0x09c7, 0x09c8},
+ {0x09cb, 0x09cd},
+ {0x09d7, 0x09d7},
+ {0x09e2, 0x09e3},
+ {0x0a01, 0x0a03},
+ {0x0a3c, 0x0a3c},
+ {0x0a3e, 0x0a42},
+ {0x0a47, 0x0a48},
+ {0x0a4b, 0x0a4d},
+ {0x0a51, 0x0a51},
+ {0x0a70, 0x0a71},
+ {0x0a75, 0x0a75},
+ {0x0a81, 0x0a83},
+ {0x0abc, 0x0abc},
+ {0x0abe, 0x0ac5},
+ {0x0ac7, 0x0ac9},
+ {0x0acb, 0x0acd},
+ {0x0ae2, 0x0ae3},
+ {0x0b01, 0x0b03},
+ {0x0b3c, 0x0b3c},
+ {0x0b3e, 0x0b44},
+ {0x0b47, 0x0b48},
+ {0x0b4b, 0x0b4d},
+ {0x0b56, 0x0b57},
+ {0x0b62, 0x0b63},
+ {0x0b82, 0x0b82},
+ {0x0bbe, 0x0bc2},
+ {0x0bc6, 0x0bc8},
+ {0x0bca, 0x0bcd},
+ {0x0bd7, 0x0bd7},
+ {0x0c01, 0x0c03},
+ {0x0c3e, 0x0c44},
+ {0x0c46, 0x0c48},
+ {0x0c4a, 0x0c4d},
+ {0x0c55, 0x0c56},
+ {0x0c62, 0x0c63},
+ {0x0c82, 0x0c83},
+ {0x0cbc, 0x0cbc},
+ {0x0cbe, 0x0cc4},
+ {0x0cc6, 0x0cc8},
+ {0x0cca, 0x0ccd},
+ {0x0cd5, 0x0cd6},
+ {0x0ce2, 0x0ce3},
+ {0x0d02, 0x0d03},
+ {0x0d3e, 0x0d44},
+ {0x0d46, 0x0d48},
+ {0x0d4a, 0x0d4d},
+ {0x0d57, 0x0d57},
+ {0x0d62, 0x0d63},
+ {0x0d82, 0x0d83},
+ {0x0dca, 0x0dca},
+ {0x0dcf, 0x0dd4},
+ {0x0dd6, 0x0dd6},
+ {0x0dd8, 0x0ddf},
+ {0x0df2, 0x0df3},
+ {0x0e31, 0x0e31},
+ {0x0e34, 0x0e3a},
+ {0x0e47, 0x0e4e},
+ {0x0eb1, 0x0eb1},
+ {0x0eb4, 0x0eb9},
+ {0x0ebb, 0x0ebc},
+ {0x0ec8, 0x0ecd},
+ {0x0f18, 0x0f19},
+ {0x0f35, 0x0f35},
+ {0x0f37, 0x0f37},
+ {0x0f39, 0x0f39},
+ {0x0f3e, 0x0f3f},
+ {0x0f71, 0x0f84},
+ {0x0f86, 0x0f87},
+ {0x0f90, 0x0f97},
+ {0x0f99, 0x0fbc},
+ {0x0fc6, 0x0fc6},
+ {0x102b, 0x103e},
+ {0x1056, 0x1059},
+ {0x105e, 0x1060},
+ {0x1062, 0x1064},
+ {0x1067, 0x106d},
+ {0x1071, 0x1074},
+ {0x1082, 0x108d},
+ {0x108f, 0x108f},
+ {0x109a, 0x109d},
+ {0x135f, 0x135f},
+ {0x1712, 0x1714},
+ {0x1732, 0x1734},
+ {0x1752, 0x1753},
+ {0x1772, 0x1773},
+ {0x17b6, 0x17d3},
+ {0x17dd, 0x17dd},
+ {0x180b, 0x180d},
+ {0x18a9, 0x18a9},
+ {0x1920, 0x192b},
+ {0x1930, 0x193b},
+ {0x19b0, 0x19c0},
+ {0x19c8, 0x19c9},
+ {0x1a17, 0x1a1b},
+ {0x1a55, 0x1a5e},
+ {0x1a60, 0x1a7c},
+ {0x1a7f, 0x1a7f},
+ {0x1b00, 0x1b04},
+ {0x1b34, 0x1b44},
+ {0x1b6b, 0x1b73},
+ {0x1b80, 0x1b82},
+ {0x1ba1, 0x1baa},
+ {0x1c24, 0x1c37},
+ {0x1cd0, 0x1cd2},
+ {0x1cd4, 0x1ce8},
+ {0x1ced, 0x1ced},
+ {0x1cf2, 0x1cf2},
+ {0x1dc0, 0x1de6},
+ {0x1dfd, 0x1dff},
+ {0x20d0, 0x20f0},
+ {0x2cef, 0x2cf1},
+ {0x2de0, 0x2dff},
+ {0x302a, 0x302f},
+ {0x3099, 0x309a},
+ {0xa66f, 0xa672},
+ {0xa67c, 0xa67d},
+ {0xa6f0, 0xa6f1},
+ {0xa802, 0xa802},
+ {0xa806, 0xa806},
+ {0xa80b, 0xa80b},
+ {0xa823, 0xa827},
+ {0xa880, 0xa881},
+ {0xa8b4, 0xa8c4},
+ {0xa8e0, 0xa8f1},
+ {0xa926, 0xa92d},
+ {0xa947, 0xa953},
+ {0xa980, 0xa983},
+ {0xa9b3, 0xa9c0},
+ {0xaa29, 0xaa36},
+ {0xaa43, 0xaa43},
+ {0xaa4c, 0xaa4d},
+ {0xaa7b, 0xaa7b},
+ {0xaab0, 0xaab0},
+ {0xaab2, 0xaab4},
+ {0xaab7, 0xaab8},
+ {0xaabe, 0xaabf},
+ {0xaac1, 0xaac1},
+ {0xabe3, 0xabea},
+ {0xabec, 0xabed},
+ {0xfb1e, 0xfb1e},
+ {0xfe00, 0xfe0f},
+ {0xfe20, 0xfe26},
+ {0x101fd, 0x101fd},
+ {0x10a01, 0x10a03},
+ {0x10a05, 0x10a06},
+ {0x10a0c, 0x10a0f},
+ {0x10a38, 0x10a3a},
+ {0x10a3f, 0x10a3f},
+ {0x11080, 0x11082},
+ {0x110b0, 0x110ba},
+ {0x1d165, 0x1d169},
+ {0x1d16d, 0x1d172},
+ {0x1d17b, 0x1d182},
+ {0x1d185, 0x1d18b},
+ {0x1d1aa, 0x1d1ad},
+ {0x1d242, 0x1d244},
+ {0xe0100, 0xe01ef}
+ };
+
+ return intable(combining, sizeof(combining), c);
+}
+
+/*
+ * Return TRUE for characters that can be displayed in a normal way.
+ * Only for characters of 0x100 and above!
+ */
+int utf_printable(int c)
+{
+#ifdef USE_WCHAR_FUNCTIONS
+ /*
+ * Assume the iswprint() library function works better than our own stuff.
+ */
+ return iswprint(c);
+#else
+ /* Sorted list of non-overlapping intervals.
+ * 0xd800-0xdfff is reserved for UTF-16, actually illegal. */
+ static struct interval nonprint[] =
+ {
+ {0x070f, 0x070f}, {0x180b, 0x180e}, {0x200b, 0x200f}, {0x202a, 0x202e},
+ {0x206a, 0x206f}, {0xd800, 0xdfff}, {0xfeff, 0xfeff}, {0xfff9, 0xfffb},
+ {0xfffe, 0xffff}
+ };
+
+ return !intable(nonprint, sizeof(nonprint), c);
+#endif
+}
+
+/*
+ * Get class of a Unicode character.
+ * 0: white space
+ * 1: punctuation
+ * 2 or bigger: some class of word character.
+ */
+int utf_class(int c)
+{
+ /* sorted list of non-overlapping intervals */
+ static struct clinterval {
+ unsigned int first;
+ unsigned int last;
+ unsigned int class;
+ } classes[] =
+ {
+ {0x037e, 0x037e, 1}, /* Greek question mark */
+ {0x0387, 0x0387, 1}, /* Greek ano teleia */
+ {0x055a, 0x055f, 1}, /* Armenian punctuation */
+ {0x0589, 0x0589, 1}, /* Armenian full stop */
+ {0x05be, 0x05be, 1},
+ {0x05c0, 0x05c0, 1},
+ {0x05c3, 0x05c3, 1},
+ {0x05f3, 0x05f4, 1},
+ {0x060c, 0x060c, 1},
+ {0x061b, 0x061b, 1},
+ {0x061f, 0x061f, 1},
+ {0x066a, 0x066d, 1},
+ {0x06d4, 0x06d4, 1},
+ {0x0700, 0x070d, 1}, /* Syriac punctuation */
+ {0x0964, 0x0965, 1},
+ {0x0970, 0x0970, 1},
+ {0x0df4, 0x0df4, 1},
+ {0x0e4f, 0x0e4f, 1},
+ {0x0e5a, 0x0e5b, 1},
+ {0x0f04, 0x0f12, 1},
+ {0x0f3a, 0x0f3d, 1},
+ {0x0f85, 0x0f85, 1},
+ {0x104a, 0x104f, 1}, /* Myanmar punctuation */
+ {0x10fb, 0x10fb, 1}, /* Georgian punctuation */
+ {0x1361, 0x1368, 1}, /* Ethiopic punctuation */
+ {0x166d, 0x166e, 1}, /* Canadian Syl. punctuation */
+ {0x1680, 0x1680, 0},
+ {0x169b, 0x169c, 1},
+ {0x16eb, 0x16ed, 1},
+ {0x1735, 0x1736, 1},
+ {0x17d4, 0x17dc, 1}, /* Khmer punctuation */
+ {0x1800, 0x180a, 1}, /* Mongolian punctuation */
+ {0x2000, 0x200b, 0}, /* spaces */
+ {0x200c, 0x2027, 1}, /* punctuation and symbols */
+ {0x2028, 0x2029, 0},
+ {0x202a, 0x202e, 1}, /* punctuation and symbols */
+ {0x202f, 0x202f, 0},
+ {0x2030, 0x205e, 1}, /* punctuation and symbols */
+ {0x205f, 0x205f, 0},
+ {0x2060, 0x27ff, 1}, /* punctuation and symbols */
+ {0x2070, 0x207f, 0x2070}, /* superscript */
+ {0x2080, 0x2094, 0x2080}, /* subscript */
+ {0x20a0, 0x27ff, 1}, /* all kinds of symbols */
+ {0x2800, 0x28ff, 0x2800}, /* braille */
+ {0x2900, 0x2998, 1}, /* arrows, brackets, etc. */
+ {0x29d8, 0x29db, 1},
+ {0x29fc, 0x29fd, 1},
+ {0x3000, 0x3000, 0}, /* ideographic space */
+ {0x3001, 0x3020, 1}, /* ideographic punctuation */
+ {0x3030, 0x3030, 1},
+ {0x303d, 0x303d, 1},
+ {0x3040, 0x309f, 0x3040}, /* Hiragana */
+ {0x30a0, 0x30ff, 0x30a0}, /* Katakana */
+ {0x3300, 0x9fff, 0x4e00}, /* CJK Ideographs */
+ {0xac00, 0xd7a3, 0xac00}, /* Hangul Syllables */
+ {0xf900, 0xfaff, 0x4e00}, /* CJK Ideographs */
+ {0xfd3e, 0xfd3f, 1},
+ {0xfe30, 0xfe6b, 1}, /* punctuation forms */
+ {0xff00, 0xff0f, 1}, /* half/fullwidth ASCII */
+ {0xff1a, 0xff20, 1}, /* half/fullwidth ASCII */
+ {0xff3b, 0xff40, 1}, /* half/fullwidth ASCII */
+ {0xff5b, 0xff65, 1}, /* half/fullwidth ASCII */
+ {0x20000, 0x2a6df, 0x4e00}, /* CJK Ideographs */
+ {0x2a700, 0x2b73f, 0x4e00}, /* CJK Ideographs */
+ {0x2b740, 0x2b81f, 0x4e00}, /* CJK Ideographs */
+ {0x2f800, 0x2fa1f, 0x4e00}, /* CJK Ideographs */
+ };
+ int bot = 0;
+ int top = sizeof(classes) / sizeof(struct clinterval) - 1;
+ int mid;
+
+ /* First quick check for Latin1 characters, use 'iskeyword'. */
+ if (c < 0x100) {
+ if (c == ' ' || c == '\t' || c == NUL || c == 0xa0)
+ return 0; /* blank */
+ if (vim_iswordc(c))
+ return 2; /* word character */
+ return 1; /* punctuation */
+ }
+
+ /* binary search in table */
+ while (top >= bot) {
+ mid = (bot + top) / 2;
+ if (classes[mid].last < (unsigned int)c)
+ bot = mid + 1;
+ else if (classes[mid].first > (unsigned int)c)
+ top = mid - 1;
+ else
+ return (int)classes[mid].class;
+ }
+
+ /* most other characters are "word" characters */
+ return 2;
+}
+
+/*
+ * Code for Unicode case-dependent operations. Based on notes in
+ * http://www.unicode.org/Public/UNIDATA/CaseFolding.txt
+ * This code uses simple case folding, not full case folding.
+ * Last updated for Unicode 5.2.
+ */
+
+/*
+ * The following tables are built by ../runtime/tools/unicode.vim.
+ * They must be in numeric order, because we use binary search.
+ * An entry such as {0x41,0x5a,1,32} means that Unicode characters in the
+ * range from 0x41 to 0x5a inclusive, stepping by 1, are changed to
+ * folded/upper/lower by adding 32.
+ */
+typedef struct {
+ int rangeStart;
+ int rangeEnd;
+ int step;
+ int offset;
+} convertStruct;
+
+static convertStruct foldCase[] =
+{
+ {0x41,0x5a,1,32},
+ {0xb5,0xb5,-1,775},
+ {0xc0,0xd6,1,32},
+ {0xd8,0xde,1,32},
+ {0x100,0x12e,2,1},
+ {0x132,0x136,2,1},
+ {0x139,0x147,2,1},
+ {0x14a,0x176,2,1},
+ {0x178,0x178,-1,-121},
+ {0x179,0x17d,2,1},
+ {0x17f,0x17f,-1,-268},
+ {0x181,0x181,-1,210},
+ {0x182,0x184,2,1},
+ {0x186,0x186,-1,206},
+ {0x187,0x187,-1,1},
+ {0x189,0x18a,1,205},
+ {0x18b,0x18b,-1,1},
+ {0x18e,0x18e,-1,79},
+ {0x18f,0x18f,-1,202},
+ {0x190,0x190,-1,203},
+ {0x191,0x191,-1,1},
+ {0x193,0x193,-1,205},
+ {0x194,0x194,-1,207},
+ {0x196,0x196,-1,211},
+ {0x197,0x197,-1,209},
+ {0x198,0x198,-1,1},
+ {0x19c,0x19c,-1,211},
+ {0x19d,0x19d,-1,213},
+ {0x19f,0x19f,-1,214},
+ {0x1a0,0x1a4,2,1},
+ {0x1a6,0x1a6,-1,218},
+ {0x1a7,0x1a7,-1,1},
+ {0x1a9,0x1a9,-1,218},
+ {0x1ac,0x1ac,-1,1},
+ {0x1ae,0x1ae,-1,218},
+ {0x1af,0x1af,-1,1},
+ {0x1b1,0x1b2,1,217},
+ {0x1b3,0x1b5,2,1},
+ {0x1b7,0x1b7,-1,219},
+ {0x1b8,0x1bc,4,1},
+ {0x1c4,0x1c4,-1,2},
+ {0x1c5,0x1c5,-1,1},
+ {0x1c7,0x1c7,-1,2},
+ {0x1c8,0x1c8,-1,1},
+ {0x1ca,0x1ca,-1,2},
+ {0x1cb,0x1db,2,1},
+ {0x1de,0x1ee,2,1},
+ {0x1f1,0x1f1,-1,2},
+ {0x1f2,0x1f4,2,1},
+ {0x1f6,0x1f6,-1,-97},
+ {0x1f7,0x1f7,-1,-56},
+ {0x1f8,0x21e,2,1},
+ {0x220,0x220,-1,-130},
+ {0x222,0x232,2,1},
+ {0x23a,0x23a,-1,10795},
+ {0x23b,0x23b,-1,1},
+ {0x23d,0x23d,-1,-163},
+ {0x23e,0x23e,-1,10792},
+ {0x241,0x241,-1,1},
+ {0x243,0x243,-1,-195},
+ {0x244,0x244,-1,69},
+ {0x245,0x245,-1,71},
+ {0x246,0x24e,2,1},
+ {0x345,0x345,-1,116},
+ {0x370,0x372,2,1},
+ {0x376,0x376,-1,1},
+ {0x386,0x386,-1,38},
+ {0x388,0x38a,1,37},
+ {0x38c,0x38c,-1,64},
+ {0x38e,0x38f,1,63},
+ {0x391,0x3a1,1,32},
+ {0x3a3,0x3ab,1,32},
+ {0x3c2,0x3c2,-1,1},
+ {0x3cf,0x3cf,-1,8},
+ {0x3d0,0x3d0,-1,-30},
+ {0x3d1,0x3d1,-1,-25},
+ {0x3d5,0x3d5,-1,-15},
+ {0x3d6,0x3d6,-1,-22},
+ {0x3d8,0x3ee,2,1},
+ {0x3f0,0x3f0,-1,-54},
+ {0x3f1,0x3f1,-1,-48},
+ {0x3f4,0x3f4,-1,-60},
+ {0x3f5,0x3f5,-1,-64},
+ {0x3f7,0x3f7,-1,1},
+ {0x3f9,0x3f9,-1,-7},
+ {0x3fa,0x3fa,-1,1},
+ {0x3fd,0x3ff,1,-130},
+ {0x400,0x40f,1,80},
+ {0x410,0x42f,1,32},
+ {0x460,0x480,2,1},
+ {0x48a,0x4be,2,1},
+ {0x4c0,0x4c0,-1,15},
+ {0x4c1,0x4cd,2,1},
+ {0x4d0,0x524,2,1},
+ {0x531,0x556,1,48},
+ {0x10a0,0x10c5,1,7264},
+ {0x1e00,0x1e94,2,1},
+ {0x1e9b,0x1e9b,-1,-58},
+ {0x1e9e,0x1e9e,-1,-7615},
+ {0x1ea0,0x1efe,2,1},
+ {0x1f08,0x1f0f,1,-8},
+ {0x1f18,0x1f1d,1,-8},
+ {0x1f28,0x1f2f,1,-8},
+ {0x1f38,0x1f3f,1,-8},
+ {0x1f48,0x1f4d,1,-8},
+ {0x1f59,0x1f5f,2,-8},
+ {0x1f68,0x1f6f,1,-8},
+ {0x1f88,0x1f8f,1,-8},
+ {0x1f98,0x1f9f,1,-8},
+ {0x1fa8,0x1faf,1,-8},
+ {0x1fb8,0x1fb9,1,-8},
+ {0x1fba,0x1fbb,1,-74},
+ {0x1fbc,0x1fbc,-1,-9},
+ {0x1fbe,0x1fbe,-1,-7173},
+ {0x1fc8,0x1fcb,1,-86},
+ {0x1fcc,0x1fcc,-1,-9},
+ {0x1fd8,0x1fd9,1,-8},
+ {0x1fda,0x1fdb,1,-100},
+ {0x1fe8,0x1fe9,1,-8},
+ {0x1fea,0x1feb,1,-112},
+ {0x1fec,0x1fec,-1,-7},
+ {0x1ff8,0x1ff9,1,-128},
+ {0x1ffa,0x1ffb,1,-126},
+ {0x1ffc,0x1ffc,-1,-9},
+ {0x2126,0x2126,-1,-7517},
+ {0x212a,0x212a,-1,-8383},
+ {0x212b,0x212b,-1,-8262},
+ {0x2132,0x2132,-1,28},
+ {0x2160,0x216f,1,16},
+ {0x2183,0x2183,-1,1},
+ {0x24b6,0x24cf,1,26},
+ {0x2c00,0x2c2e,1,48},
+ {0x2c60,0x2c60,-1,1},
+ {0x2c62,0x2c62,-1,-10743},
+ {0x2c63,0x2c63,-1,-3814},
+ {0x2c64,0x2c64,-1,-10727},
+ {0x2c67,0x2c6b,2,1},
+ {0x2c6d,0x2c6d,-1,-10780},
+ {0x2c6e,0x2c6e,-1,-10749},
+ {0x2c6f,0x2c6f,-1,-10783},
+ {0x2c70,0x2c70,-1,-10782},
+ {0x2c72,0x2c75,3,1},
+ {0x2c7e,0x2c7f,1,-10815},
+ {0x2c80,0x2ce2,2,1},
+ {0x2ceb,0x2ced,2,1},
+ {0xa640,0xa65e,2,1},
+ {0xa662,0xa66c,2,1},
+ {0xa680,0xa696,2,1},
+ {0xa722,0xa72e,2,1},
+ {0xa732,0xa76e,2,1},
+ {0xa779,0xa77b,2,1},
+ {0xa77d,0xa77d,-1,-35332},
+ {0xa77e,0xa786,2,1},
+ {0xa78b,0xa78b,-1,1},
+ {0xff21,0xff3a,1,32},
+ {0x10400,0x10427,1,40}
+};
+
+static int utf_convert(int a, convertStruct table[], int tableSize);
+static int utf_strnicmp(char_u *s1, char_u *s2, size_t n1, size_t n2);
+
+/*
+ * Generic conversion function for case operations.
+ * Return the converted equivalent of "a", which is a UCS-4 character. Use
+ * the given conversion "table". Uses binary search on "table".
+ */
+static int utf_convert(int a, convertStruct *table, int tableSize)
+{
+ int start, mid, end; /* indices into table */
+ int entries = tableSize / sizeof(convertStruct);
+
+ start = 0;
+ end = entries;
+ while (start < end) {
+ /* need to search further */
+ mid = (end + start) / 2;
+ if (table[mid].rangeEnd < a)
+ start = mid + 1;
+ else
+ end = mid;
+ }
+ if (start < entries
+ && table[start].rangeStart <= a
+ && a <= table[start].rangeEnd
+ && (a - table[start].rangeStart) % table[start].step == 0)
+ return a + table[start].offset;
+ else
+ return a;
+}
+
+/*
+ * Return the folded-case equivalent of "a", which is a UCS-4 character. Uses
+ * simple case folding.
+ */
+int utf_fold(int a)
+{
+ return utf_convert(a, foldCase, (int)sizeof(foldCase));
+}
+
+static convertStruct toLower[] =
+{
+ {0x41,0x5a,1,32},
+ {0xc0,0xd6,1,32},
+ {0xd8,0xde,1,32},
+ {0x100,0x12e,2,1},
+ {0x130,0x130,-1,-199},
+ {0x132,0x136,2,1},
+ {0x139,0x147,2,1},
+ {0x14a,0x176,2,1},
+ {0x178,0x178,-1,-121},
+ {0x179,0x17d,2,1},
+ {0x181,0x181,-1,210},
+ {0x182,0x184,2,1},
+ {0x186,0x186,-1,206},
+ {0x187,0x187,-1,1},
+ {0x189,0x18a,1,205},
+ {0x18b,0x18b,-1,1},
+ {0x18e,0x18e,-1,79},
+ {0x18f,0x18f,-1,202},
+ {0x190,0x190,-1,203},
+ {0x191,0x191,-1,1},
+ {0x193,0x193,-1,205},
+ {0x194,0x194,-1,207},
+ {0x196,0x196,-1,211},
+ {0x197,0x197,-1,209},
+ {0x198,0x198,-1,1},
+ {0x19c,0x19c,-1,211},
+ {0x19d,0x19d,-1,213},
+ {0x19f,0x19f,-1,214},
+ {0x1a0,0x1a4,2,1},
+ {0x1a6,0x1a6,-1,218},
+ {0x1a7,0x1a7,-1,1},
+ {0x1a9,0x1a9,-1,218},
+ {0x1ac,0x1ac,-1,1},
+ {0x1ae,0x1ae,-1,218},
+ {0x1af,0x1af,-1,1},
+ {0x1b1,0x1b2,1,217},
+ {0x1b3,0x1b5,2,1},
+ {0x1b7,0x1b7,-1,219},
+ {0x1b8,0x1bc,4,1},
+ {0x1c4,0x1c4,-1,2},
+ {0x1c5,0x1c5,-1,1},
+ {0x1c7,0x1c7,-1,2},
+ {0x1c8,0x1c8,-1,1},
+ {0x1ca,0x1ca,-1,2},
+ {0x1cb,0x1db,2,1},
+ {0x1de,0x1ee,2,1},
+ {0x1f1,0x1f1,-1,2},
+ {0x1f2,0x1f4,2,1},
+ {0x1f6,0x1f6,-1,-97},
+ {0x1f7,0x1f7,-1,-56},
+ {0x1f8,0x21e,2,1},
+ {0x220,0x220,-1,-130},
+ {0x222,0x232,2,1},
+ {0x23a,0x23a,-1,10795},
+ {0x23b,0x23b,-1,1},
+ {0x23d,0x23d,-1,-163},
+ {0x23e,0x23e,-1,10792},
+ {0x241,0x241,-1,1},
+ {0x243,0x243,-1,-195},
+ {0x244,0x244,-1,69},
+ {0x245,0x245,-1,71},
+ {0x246,0x24e,2,1},
+ {0x370,0x372,2,1},
+ {0x376,0x376,-1,1},
+ {0x386,0x386,-1,38},
+ {0x388,0x38a,1,37},
+ {0x38c,0x38c,-1,64},
+ {0x38e,0x38f,1,63},
+ {0x391,0x3a1,1,32},
+ {0x3a3,0x3ab,1,32},
+ {0x3cf,0x3cf,-1,8},
+ {0x3d8,0x3ee,2,1},
+ {0x3f4,0x3f4,-1,-60},
+ {0x3f7,0x3f7,-1,1},
+ {0x3f9,0x3f9,-1,-7},
+ {0x3fa,0x3fa,-1,1},
+ {0x3fd,0x3ff,1,-130},
+ {0x400,0x40f,1,80},
+ {0x410,0x42f,1,32},
+ {0x460,0x480,2,1},
+ {0x48a,0x4be,2,1},
+ {0x4c0,0x4c0,-1,15},
+ {0x4c1,0x4cd,2,1},
+ {0x4d0,0x524,2,1},
+ {0x531,0x556,1,48},
+ {0x10a0,0x10c5,1,7264},
+ {0x1e00,0x1e94,2,1},
+ {0x1e9e,0x1e9e,-1,-7615},
+ {0x1ea0,0x1efe,2,1},
+ {0x1f08,0x1f0f,1,-8},
+ {0x1f18,0x1f1d,1,-8},
+ {0x1f28,0x1f2f,1,-8},
+ {0x1f38,0x1f3f,1,-8},
+ {0x1f48,0x1f4d,1,-8},
+ {0x1f59,0x1f5f,2,-8},
+ {0x1f68,0x1f6f,1,-8},
+ {0x1f88,0x1f8f,1,-8},
+ {0x1f98,0x1f9f,1,-8},
+ {0x1fa8,0x1faf,1,-8},
+ {0x1fb8,0x1fb9,1,-8},
+ {0x1fba,0x1fbb,1,-74},
+ {0x1fbc,0x1fbc,-1,-9},
+ {0x1fc8,0x1fcb,1,-86},
+ {0x1fcc,0x1fcc,-1,-9},
+ {0x1fd8,0x1fd9,1,-8},
+ {0x1fda,0x1fdb,1,-100},
+ {0x1fe8,0x1fe9,1,-8},
+ {0x1fea,0x1feb,1,-112},
+ {0x1fec,0x1fec,-1,-7},
+ {0x1ff8,0x1ff9,1,-128},
+ {0x1ffa,0x1ffb,1,-126},
+ {0x1ffc,0x1ffc,-1,-9},
+ {0x2126,0x2126,-1,-7517},
+ {0x212a,0x212a,-1,-8383},
+ {0x212b,0x212b,-1,-8262},
+ {0x2132,0x2132,-1,28},
+ {0x2160,0x216f,1,16},
+ {0x2183,0x2183,-1,1},
+ {0x24b6,0x24cf,1,26},
+ {0x2c00,0x2c2e,1,48},
+ {0x2c60,0x2c60,-1,1},
+ {0x2c62,0x2c62,-1,-10743},
+ {0x2c63,0x2c63,-1,-3814},
+ {0x2c64,0x2c64,-1,-10727},
+ {0x2c67,0x2c6b,2,1},
+ {0x2c6d,0x2c6d,-1,-10780},
+ {0x2c6e,0x2c6e,-1,-10749},
+ {0x2c6f,0x2c6f,-1,-10783},
+ {0x2c70,0x2c70,-1,-10782},
+ {0x2c72,0x2c75,3,1},
+ {0x2c7e,0x2c7f,1,-10815},
+ {0x2c80,0x2ce2,2,1},
+ {0x2ceb,0x2ced,2,1},
+ {0xa640,0xa65e,2,1},
+ {0xa662,0xa66c,2,1},
+ {0xa680,0xa696,2,1},
+ {0xa722,0xa72e,2,1},
+ {0xa732,0xa76e,2,1},
+ {0xa779,0xa77b,2,1},
+ {0xa77d,0xa77d,-1,-35332},
+ {0xa77e,0xa786,2,1},
+ {0xa78b,0xa78b,-1,1},
+ {0xff21,0xff3a,1,32},
+ {0x10400,0x10427,1,40}
+};
+
+static convertStruct toUpper[] =
+{
+ {0x61,0x7a,1,-32},
+ {0xb5,0xb5,-1,743},
+ {0xe0,0xf6,1,-32}, /* 0xdf (German sharp s) is not upper-cased */
+ {0xf8,0xfe,1,-32},
+ {0xff,0xff,-1,121},
+ {0x101,0x12f,2,-1},
+ {0x131,0x131,-1,-232},
+ {0x133,0x137,2,-1},
+ {0x13a,0x148,2,-1},
+ {0x14b,0x177,2,-1},
+ {0x17a,0x17e,2,-1},
+ {0x17f,0x17f,-1,-300},
+ {0x180,0x180,-1,195},
+ {0x183,0x185,2,-1},
+ {0x188,0x18c,4,-1},
+ {0x192,0x192,-1,-1},
+ {0x195,0x195,-1,97},
+ {0x199,0x199,-1,-1},
+ {0x19a,0x19a,-1,163},
+ {0x19e,0x19e,-1,130},
+ {0x1a1,0x1a5,2,-1},
+ {0x1a8,0x1ad,5,-1},
+ {0x1b0,0x1b4,4,-1},
+ {0x1b6,0x1b9,3,-1},
+ {0x1bd,0x1bd,-1,-1},
+ {0x1bf,0x1bf,-1,56},
+ {0x1c5,0x1c5,-1,-1},
+ {0x1c6,0x1c6,-1,-2},
+ {0x1c8,0x1c8,-1,-1},
+ {0x1c9,0x1c9,-1,-2},
+ {0x1cb,0x1cb,-1,-1},
+ {0x1cc,0x1cc,-1,-2},
+ {0x1ce,0x1dc,2,-1},
+ {0x1dd,0x1dd,-1,-79},
+ {0x1df,0x1ef,2,-1},
+ {0x1f2,0x1f2,-1,-1},
+ {0x1f3,0x1f3,-1,-2},
+ {0x1f5,0x1f9,4,-1},
+ {0x1fb,0x21f,2,-1},
+ {0x223,0x233,2,-1},
+ {0x23c,0x23c,-1,-1},
+ {0x23f,0x240,1,10815},
+ {0x242,0x247,5,-1},
+ {0x249,0x24f,2,-1},
+ {0x250,0x250,-1,10783},
+ {0x251,0x251,-1,10780},
+ {0x252,0x252,-1,10782},
+ {0x253,0x253,-1,-210},
+ {0x254,0x254,-1,-206},
+ {0x256,0x257,1,-205},
+ {0x259,0x259,-1,-202},
+ {0x25b,0x25b,-1,-203},
+ {0x260,0x260,-1,-205},
+ {0x263,0x263,-1,-207},
+ {0x268,0x268,-1,-209},
+ {0x269,0x269,-1,-211},
+ {0x26b,0x26b,-1,10743},
+ {0x26f,0x26f,-1,-211},
+ {0x271,0x271,-1,10749},
+ {0x272,0x272,-1,-213},
+ {0x275,0x275,-1,-214},
+ {0x27d,0x27d,-1,10727},
+ {0x280,0x283,3,-218},
+ {0x288,0x288,-1,-218},
+ {0x289,0x289,-1,-69},
+ {0x28a,0x28b,1,-217},
+ {0x28c,0x28c,-1,-71},
+ {0x292,0x292,-1,-219},
+ {0x345,0x345,-1,84},
+ {0x371,0x373,2,-1},
+ {0x377,0x377,-1,-1},
+ {0x37b,0x37d,1,130},
+ {0x3ac,0x3ac,-1,-38},
+ {0x3ad,0x3af,1,-37},
+ {0x3b1,0x3c1,1,-32},
+ {0x3c2,0x3c2,-1,-31},
+ {0x3c3,0x3cb,1,-32},
+ {0x3cc,0x3cc,-1,-64},
+ {0x3cd,0x3ce,1,-63},
+ {0x3d0,0x3d0,-1,-62},
+ {0x3d1,0x3d1,-1,-57},
+ {0x3d5,0x3d5,-1,-47},
+ {0x3d6,0x3d6,-1,-54},
+ {0x3d7,0x3d7,-1,-8},
+ {0x3d9,0x3ef,2,-1},
+ {0x3f0,0x3f0,-1,-86},
+ {0x3f1,0x3f1,-1,-80},
+ {0x3f2,0x3f2,-1,7},
+ {0x3f5,0x3f5,-1,-96},
+ {0x3f8,0x3fb,3,-1},
+ {0x430,0x44f,1,-32},
+ {0x450,0x45f,1,-80},
+ {0x461,0x481,2,-1},
+ {0x48b,0x4bf,2,-1},
+ {0x4c2,0x4ce,2,-1},
+ {0x4cf,0x4cf,-1,-15},
+ {0x4d1,0x525,2,-1},
+ {0x561,0x586,1,-48},
+ {0x1d79,0x1d79,-1,35332},
+ {0x1d7d,0x1d7d,-1,3814},
+ {0x1e01,0x1e95,2,-1},
+ {0x1e9b,0x1e9b,-1,-59},
+ {0x1ea1,0x1eff,2,-1},
+ {0x1f00,0x1f07,1,8},
+ {0x1f10,0x1f15,1,8},
+ {0x1f20,0x1f27,1,8},
+ {0x1f30,0x1f37,1,8},
+ {0x1f40,0x1f45,1,8},
+ {0x1f51,0x1f57,2,8},
+ {0x1f60,0x1f67,1,8},
+ {0x1f70,0x1f71,1,74},
+ {0x1f72,0x1f75,1,86},
+ {0x1f76,0x1f77,1,100},
+ {0x1f78,0x1f79,1,128},
+ {0x1f7a,0x1f7b,1,112},
+ {0x1f7c,0x1f7d,1,126},
+ {0x1f80,0x1f87,1,8},
+ {0x1f90,0x1f97,1,8},
+ {0x1fa0,0x1fa7,1,8},
+ {0x1fb0,0x1fb1,1,8},
+ {0x1fb3,0x1fb3,-1,9},
+ {0x1fbe,0x1fbe,-1,-7205},
+ {0x1fc3,0x1fc3,-1,9},
+ {0x1fd0,0x1fd1,1,8},
+ {0x1fe0,0x1fe1,1,8},
+ {0x1fe5,0x1fe5,-1,7},
+ {0x1ff3,0x1ff3,-1,9},
+ {0x214e,0x214e,-1,-28},
+ {0x2170,0x217f,1,-16},
+ {0x2184,0x2184,-1,-1},
+ {0x24d0,0x24e9,1,-26},
+ {0x2c30,0x2c5e,1,-48},
+ {0x2c61,0x2c61,-1,-1},
+ {0x2c65,0x2c65,-1,-10795},
+ {0x2c66,0x2c66,-1,-10792},
+ {0x2c68,0x2c6c,2,-1},
+ {0x2c73,0x2c76,3,-1},
+ {0x2c81,0x2ce3,2,-1},
+ {0x2cec,0x2cee,2,-1},
+ {0x2d00,0x2d25,1,-7264},
+ {0xa641,0xa65f,2,-1},
+ {0xa663,0xa66d,2,-1},
+ {0xa681,0xa697,2,-1},
+ {0xa723,0xa72f,2,-1},
+ {0xa733,0xa76f,2,-1},
+ {0xa77a,0xa77c,2,-1},
+ {0xa77f,0xa787,2,-1},
+ {0xa78c,0xa78c,-1,-1},
+ {0xff41,0xff5a,1,-32},
+ {0x10428,0x1044f,1,-40}
+};
+
+/*
+ * Return the upper-case equivalent of "a", which is a UCS-4 character. Use
+ * simple case folding.
+ */
+int utf_toupper(int a)
+{
+ /* If 'casemap' contains "keepascii" use ASCII style toupper(). */
+ if (a < 128 && (cmp_flags & CMP_KEEPASCII))
+ return TOUPPER_ASC(a);
+
+#if defined(__STDC_ISO_10646__)
+ /* If towupper() is available and handles Unicode, use it. */
+ if (!(cmp_flags & CMP_INTERNAL))
+ return towupper(a);
+#endif
+
+ /* For characters below 128 use locale sensitive toupper(). */
+ if (a < 128)
+ return TOUPPER_LOC(a);
+
+ /* For any other characters use the above mapping table. */
+ return utf_convert(a, toUpper, (int)sizeof(toUpper));
+}
+
+int utf_islower(int a)
+{
+ /* German sharp s is lower case but has no upper case equivalent. */
+ return (utf_toupper(a) != a) || a == 0xdf;
+}
+
+/*
+ * Return the lower-case equivalent of "a", which is a UCS-4 character. Use
+ * simple case folding.
+ */
+int utf_tolower(int a)
+{
+ /* If 'casemap' contains "keepascii" use ASCII style tolower(). */
+ if (a < 128 && (cmp_flags & CMP_KEEPASCII))
+ return TOLOWER_ASC(a);
+
+#if defined(__STDC_ISO_10646__)
+ /* If towlower() is available and handles Unicode, use it. */
+ if (!(cmp_flags & CMP_INTERNAL))
+ return towlower(a);
+#endif
+
+ /* For characters below 128 use locale sensitive tolower(). */
+ if (a < 128)
+ return TOLOWER_LOC(a);
+
+ /* For any other characters use the above mapping table. */
+ return utf_convert(a, toLower, (int)sizeof(toLower));
+}
+
+int utf_isupper(int a)
+{
+ return utf_tolower(a) != a;
+}
+
+static int utf_strnicmp(char_u *s1, char_u *s2, size_t n1, size_t n2)
+{
+ int c1, c2, cdiff;
+ char_u buffer[6];
+
+ for (;; ) {
+ c1 = utf_safe_read_char_adv(&s1, &n1);
+ c2 = utf_safe_read_char_adv(&s2, &n2);
+
+ if (c1 <= 0 || c2 <= 0)
+ break;
+
+ if (c1 == c2)
+ continue;
+
+ cdiff = utf_fold(c1) - utf_fold(c2);
+ if (cdiff != 0)
+ return cdiff;
+ }
+
+ /* some string ended or has an incomplete/illegal character sequence */
+
+ if (c1 == 0 || c2 == 0) {
+ /* some string ended. shorter string is smaller */
+ if (c1 == 0 && c2 == 0)
+ return 0;
+ return c1 == 0 ? -1 : 1;
+ }
+
+ /* Continue with bytewise comparison to produce some result that
+ * would make comparison operations involving this function transitive.
+ *
+ * If only one string had an error, comparison should be made with
+ * folded version of the other string. In this case it is enough
+ * to fold just one character to determine the result of comparison. */
+
+ if (c1 != -1 && c2 == -1) {
+ n1 = utf_char2bytes(utf_fold(c1), buffer);
+ s1 = buffer;
+ } else if (c2 != -1 && c1 == -1) {
+ n2 = utf_char2bytes(utf_fold(c2), buffer);
+ s2 = buffer;
+ }
+
+ while (n1 > 0 && n2 > 0 && *s1 != NUL && *s2 != NUL) {
+ cdiff = (int)(*s1) - (int)(*s2);
+ if (cdiff != 0)
+ return cdiff;
+
+ s1++;
+ s2++;
+ n1--;
+ n2--;
+ }
+
+ if (n1 > 0 && *s1 == NUL)
+ n1 = 0;
+ if (n2 > 0 && *s2 == NUL)
+ n2 = 0;
+
+ if (n1 == 0 && n2 == 0)
+ return 0;
+ return n1 == 0 ? -1 : 1;
+}
+
+/*
+ * Version of strnicmp() that handles multi-byte characters.
+ * Needed for Big5, Shift-JIS and UTF-8 encoding. Other DBCS encodings can
+ * probably use strnicmp(), because there are no ASCII characters in the
+ * second byte.
+ * Returns zero if s1 and s2 are equal (ignoring case), the difference between
+ * two characters otherwise.
+ */
+int mb_strnicmp(char_u *s1, char_u *s2, size_t nn)
+{
+ int i, l;
+ int cdiff;
+ int n = (int)nn;
+
+ if (enc_utf8) {
+ return utf_strnicmp(s1, s2, nn, nn);
+ } else {
+ for (i = 0; i < n; i += l) {
+ if (s1[i] == NUL && s2[i] == NUL) /* both strings end */
+ return 0;
+
+ l = (*mb_ptr2len)(s1 + i);
+ if (l <= 1) {
+ /* Single byte: first check normally, then with ignore case. */
+ if (s1[i] != s2[i]) {
+ cdiff = vim_tolower(s1[i]) - vim_tolower(s2[i]);
+ if (cdiff != 0)
+ return cdiff;
+ }
+ } else {
+ /* For non-Unicode multi-byte don't ignore case. */
+ if (l > n - i)
+ l = n - i;
+ cdiff = STRNCMP(s1 + i, s2 + i, l);
+ if (cdiff != 0)
+ return cdiff;
+ }
+ }
+ }
+ return 0;
+}
+
+/*
+ * "g8": show bytes of the UTF-8 char under the cursor. Doesn't matter what
+ * 'encoding' has been set to.
+ */
+void show_utf8()
+{
+ int len;
+ int rlen = 0;
+ char_u *line;
+ int clen;
+ int i;
+
+ /* Get the byte length of the char under the cursor, including composing
+ * characters. */
+ line = ml_get_cursor();
+ len = utfc_ptr2len(line);
+ if (len == 0) {
+ MSG("NUL");
+ return;
+ }
+
+ clen = 0;
+ for (i = 0; i < len; ++i) {
+ if (clen == 0) {
+ /* start of (composing) character, get its length */
+ if (i > 0) {
+ STRCPY(IObuff + rlen, "+ ");
+ rlen += 2;
+ }
+ clen = utf_ptr2len(line + i);
+ }
+ sprintf((char *)IObuff + rlen, "%02x ",
+ (line[i] == NL) ? NUL : line[i]); /* NUL is stored as NL */
+ --clen;
+ rlen += (int)STRLEN(IObuff + rlen);
+ if (rlen > IOSIZE - 20)
+ break;
+ }
+
+ msg(IObuff);
+}
+
+/*
+ * mb_head_off() function pointer.
+ * Return offset from "p" to the first byte of the character it points into.
+ * If "p" points to the NUL at the end of the string return 0.
+ * Returns 0 when already at the first byte of a character.
+ */
+int latin_head_off(char_u *base, char_u *p)
+{
+ return 0;
+}
+
+int dbcs_head_off(char_u *base, char_u *p)
+{
+ char_u *q;
+
+ /* It can't be a trailing byte when not using DBCS, at the start of the
+ * string or the previous byte can't start a double-byte. */
+ if (p <= base || MB_BYTE2LEN(p[-1]) == 1 || *p == NUL)
+ return 0;
+
+ /* This is slow: need to start at the base and go forward until the
+ * byte we are looking for. Return 1 when we went past it, 0 otherwise. */
+ q = base;
+ while (q < p)
+ q += dbcs_ptr2len(q);
+ return (q == p) ? 0 : 1;
+}
+
+/*
+ * Special version of dbcs_head_off() that works for ScreenLines[], where
+ * single-width DBCS_JPNU characters are stored separately.
+ */
+int dbcs_screen_head_off(char_u *base, char_u *p)
+{
+ char_u *q;
+
+ /* It can't be a trailing byte when not using DBCS, at the start of the
+ * string or the previous byte can't start a double-byte.
+ * For euc-jp an 0x8e byte in the previous cell always means we have a
+ * lead byte in the current cell. */
+ if (p <= base
+ || (enc_dbcs == DBCS_JPNU && p[-1] == 0x8e)
+ || MB_BYTE2LEN(p[-1]) == 1
+ || *p == NUL)
+ return 0;
+
+ /* This is slow: need to start at the base and go forward until the
+ * byte we are looking for. Return 1 when we went past it, 0 otherwise.
+ * For DBCS_JPNU look out for 0x8e, which means the second byte is not
+ * stored as the next byte. */
+ q = base;
+ while (q < p) {
+ if (enc_dbcs == DBCS_JPNU && *q == 0x8e)
+ ++q;
+ else
+ q += dbcs_ptr2len(q);
+ }
+ return (q == p) ? 0 : 1;
+}
+
+int utf_head_off(char_u *base, char_u *p)
+{
+ char_u *q;
+ char_u *s;
+ int c;
+ int len;
+ char_u *j;
+
+ if (*p < 0x80) /* be quick for ASCII */
+ return 0;
+
+ /* Skip backwards over trailing bytes: 10xx.xxxx
+ * Skip backwards again if on a composing char. */
+ for (q = p;; --q) {
+ /* Move s to the last byte of this char. */
+ for (s = q; (s[1] & 0xc0) == 0x80; ++s)
+ ;
+ /* Move q to the first byte of this char. */
+ while (q > base && (*q & 0xc0) == 0x80)
+ --q;
+ /* Check for illegal sequence. Do allow an illegal byte after where we
+ * started. */
+ len = utf8len_tab[*q];
+ if (len != (int)(s - q + 1) && len != (int)(p - q + 1))
+ return 0;
+
+ if (q <= base)
+ break;
+
+ c = utf_ptr2char(q);
+ if (utf_iscomposing(c))
+ continue;
+
+ if (arabic_maycombine(c)) {
+ /* Advance to get a sneak-peak at the next char */
+ j = q;
+ --j;
+ /* Move j to the first byte of this char. */
+ while (j > base && (*j & 0xc0) == 0x80)
+ --j;
+ if (arabic_combine(utf_ptr2char(j), c))
+ continue;
+ }
+ break;
+ }
+
+ return (int)(p - q);
+}
+
+/*
+ * Copy a character from "*fp" to "*tp" and advance the pointers.
+ */
+void mb_copy_char(char_u **fp, char_u **tp)
+{
+ int l = (*mb_ptr2len)(*fp);
+
+ memmove(*tp, *fp, (size_t)l);
+ *tp += l;
+ *fp += l;
+}
+
+/*
+ * Return the offset from "p" to the first byte of a character. When "p" is
+ * at the start of a character 0 is returned, otherwise the offset to the next
+ * character. Can start anywhere in a stream of bytes.
+ */
+int mb_off_next(char_u *base, char_u *p)
+{
+ int i;
+ int j;
+
+ if (enc_utf8) {
+ if (*p < 0x80) /* be quick for ASCII */
+ return 0;
+
+ /* Find the next character that isn't 10xx.xxxx */
+ for (i = 0; (p[i] & 0xc0) == 0x80; ++i)
+ ;
+ if (i > 0) {
+ /* Check for illegal sequence. */
+ for (j = 0; p - j > base; ++j)
+ if ((p[-j] & 0xc0) != 0x80)
+ break;
+ if (utf8len_tab[p[-j]] != i + j)
+ return 0;
+ }
+ return i;
+ }
+
+ /* Only need to check if we're on a trail byte, it doesn't matter if we
+ * want the offset to the next or current character. */
+ return (*mb_head_off)(base, p);
+}
+
+/*
+ * Return the offset from "p" to the last byte of the character it points
+ * into. Can start anywhere in a stream of bytes.
+ */
+int mb_tail_off(char_u *base, char_u *p)
+{
+ int i;
+ int j;
+
+ if (*p == NUL)
+ return 0;
+
+ if (enc_utf8) {
+ /* Find the last character that is 10xx.xxxx */
+ for (i = 0; (p[i + 1] & 0xc0) == 0x80; ++i)
+ ;
+ /* Check for illegal sequence. */
+ for (j = 0; p - j > base; ++j)
+ if ((p[-j] & 0xc0) != 0x80)
+ break;
+ if (utf8len_tab[p[-j]] != i + j + 1)
+ return 0;
+ return i;
+ }
+
+ /* It can't be the first byte if a double-byte when not using DBCS, at the
+ * end of the string or the byte can't start a double-byte. */
+ if (enc_dbcs == 0 || p[1] == NUL || MB_BYTE2LEN(*p) == 1)
+ return 0;
+
+ /* Return 1 when on the lead byte, 0 when on the tail byte. */
+ return 1 - dbcs_head_off(base, p);
+}
+
+/*
+ * Find the next illegal byte sequence.
+ */
+void utf_find_illegal()
+{
+ pos_T pos = curwin->w_cursor;
+ char_u *p;
+ int len;
+ vimconv_T vimconv;
+ char_u *tofree = NULL;
+
+ vimconv.vc_type = CONV_NONE;
+ if (enc_utf8 && (enc_canon_props(curbuf->b_p_fenc) & ENC_8BIT)) {
+ /* 'encoding' is "utf-8" but we are editing a 8-bit encoded file,
+ * possibly a utf-8 file with illegal bytes. Setup for conversion
+ * from utf-8 to 'fileencoding'. */
+ convert_setup(&vimconv, p_enc, curbuf->b_p_fenc);
+ }
+
+ curwin->w_cursor.coladd = 0;
+ for (;; ) {
+ p = ml_get_cursor();
+ if (vimconv.vc_type != CONV_NONE) {
+ free(tofree);
+ tofree = string_convert(&vimconv, p, NULL);
+ if (tofree == NULL)
+ break;
+ p = tofree;
+ }
+
+ while (*p != NUL) {
+ /* Illegal means that there are not enough trail bytes (checked by
+ * utf_ptr2len()) or too many of them (overlong sequence). */
+ len = utf_ptr2len(p);
+ if (*p >= 0x80 && (len == 1
+ || utf_char2len(utf_ptr2char(p)) != len)) {
+ if (vimconv.vc_type == CONV_NONE)
+ curwin->w_cursor.col += (colnr_T)(p - ml_get_cursor());
+ else {
+ int l;
+
+ len = (int)(p - tofree);
+ for (p = ml_get_cursor(); *p != NUL && len-- > 0; p += l) {
+ l = utf_ptr2len(p);
+ curwin->w_cursor.col += l;
+ }
+ }
+ goto theend;
+ }
+ p += len;
+ }
+ if (curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count)
+ break;
+ ++curwin->w_cursor.lnum;
+ curwin->w_cursor.col = 0;
+ }
+
+ /* didn't find it: don't move and beep */
+ curwin->w_cursor = pos;
+ beep_flush();
+
+theend:
+ free(tofree);
+ convert_setup(&vimconv, NULL, NULL);
+}
+
+/*
+ * If the cursor moves on an trail byte, set the cursor on the lead byte.
+ * Thus it moves left if necessary.
+ * Return TRUE when the cursor was adjusted.
+ */
+void mb_adjust_cursor()
+{
+ mb_adjustpos(curbuf, &curwin->w_cursor);
+}
+
+/*
+ * Adjust position "*lp" to point to the first byte of a multi-byte character.
+ * If it points to a tail byte it's moved backwards to the head byte.
+ */
+void mb_adjustpos(buf_T *buf, pos_T *lp)
+{
+ char_u *p;
+
+ if (lp->col > 0
+ || lp->coladd > 1
+ ) {
+ p = ml_get_buf(buf, lp->lnum, FALSE);
+ lp->col -= (*mb_head_off)(p, p + lp->col);
+ /* Reset "coladd" when the cursor would be on the right half of a
+ * double-wide character. */
+ if (lp->coladd == 1
+ && p[lp->col] != TAB
+ && vim_isprintc((*mb_ptr2char)(p + lp->col))
+ && ptr2cells(p + lp->col) > 1)
+ lp->coladd = 0;
+ }
+}
+
+/*
+ * Return a pointer to the character before "*p", if there is one.
+ */
+char_u * mb_prevptr(
+ char_u *line, /* start of the string */
+ char_u *p
+ )
+{
+ if (p > line)
+ mb_ptr_back(line, p);
+ return p;
+}
+
+/*
+ * Return the character length of "str". Each multi-byte character (with
+ * following composing characters) counts as one.
+ */
+int mb_charlen(char_u *str)
+{
+ char_u *p = str;
+ int count;
+
+ if (p == NULL)
+ return 0;
+
+ for (count = 0; *p != NUL; count++)
+ p += (*mb_ptr2len)(p);
+
+ return count;
+}
+
+/*
+ * Like mb_charlen() but for a string with specified length.
+ */
+int mb_charlen_len(char_u *str, int len)
+{
+ char_u *p = str;
+ int count;
+
+ for (count = 0; *p != NUL && p < str + len; count++)
+ p += (*mb_ptr2len)(p);
+
+ return count;
+}
+
+/*
+ * Try to un-escape a multi-byte character.
+ * Used for the "to" and "from" part of a mapping.
+ * Return the un-escaped string if it is a multi-byte character, and advance
+ * "pp" to just after the bytes that formed it.
+ * Return NULL if no multi-byte char was found.
+ */
+char_u * mb_unescape(char_u **pp)
+{
+ static char_u buf[6];
+ int n;
+ int m = 0;
+ char_u *str = *pp;
+
+ /* Must translate K_SPECIAL KS_SPECIAL KE_FILLER to K_SPECIAL and CSI
+ * KS_EXTRA KE_CSI to CSI.
+ * Maximum length of a utf-8 character is 4 bytes. */
+ for (n = 0; str[n] != NUL && m < 4; ++n) {
+ if (str[n] == K_SPECIAL
+ && str[n + 1] == KS_SPECIAL
+ && str[n + 2] == KE_FILLER) {
+ buf[m++] = K_SPECIAL;
+ n += 2;
+ } else if ((str[n] == K_SPECIAL
+ )
+ && str[n + 1] == KS_EXTRA
+ && str[n + 2] == (int)KE_CSI) {
+ buf[m++] = CSI;
+ n += 2;
+ } else if (str[n] == K_SPECIAL
+ )
+ break; /* a special key can't be a multibyte char */
+ else
+ buf[m++] = str[n];
+ buf[m] = NUL;
+
+ /* Return a multi-byte character if it's found. An illegal sequence
+ * will result in a 1 here. */
+ if ((*mb_ptr2len)(buf) > 1) {
+ *pp = str + n + 1;
+ return buf;
+ }
+
+ /* Bail out quickly for ASCII. */
+ if (buf[0] < 128)
+ break;
+ }
+ return NULL;
+}
+
+/*
+ * Return TRUE if the character at "row"/"col" on the screen is the left side
+ * of a double-width character.
+ * Caller must make sure "row" and "col" are not invalid!
+ */
+int mb_lefthalve(int row, int col)
+{
+ return (*mb_off2cells)(LineOffset[row] + col,
+ LineOffset[row] + screen_Columns) > 1;
+}
+
+/*
+ * Correct a position on the screen, if it's the right half of a double-wide
+ * char move it to the left half. Returns the corrected column.
+ */
+int mb_fix_col(int col, int row)
+{
+ col = check_col(col);
+ row = check_row(row);
+ if (has_mbyte && ScreenLines != NULL && col > 0
+ && ((enc_dbcs
+ && ScreenLines[LineOffset[row] + col] != NUL
+ && dbcs_screen_head_off(ScreenLines + LineOffset[row],
+ ScreenLines + LineOffset[row] + col))
+ || (enc_utf8 && ScreenLines[LineOffset[row] + col] == 0)))
+ return col - 1;
+ return col;
+}
+
+static int enc_alias_search(char_u *name);
+
+/*
+ * Skip the Vim specific head of a 'encoding' name.
+ */
+char_u * enc_skip(char_u *p)
+{
+ if (STRNCMP(p, "2byte-", 6) == 0)
+ return p + 6;
+ if (STRNCMP(p, "8bit-", 5) == 0)
+ return p + 5;
+ return p;
+}
+
+/*
+ * Find the canonical name for encoding "enc".
+ * When the name isn't recognized, returns "enc" itself, but with all lower
+ * case characters and '_' replaced with '-'.
+ * Returns an allocated string. NULL for out-of-memory.
+ */
+char_u * enc_canonize(char_u *enc)
+{
+ char_u *r;
+ char_u *p, *s;
+ int i;
+
+ if (STRCMP(enc, "default") == 0) {
+ /* Use the default encoding as it's found by set_init_1(). */
+ r = get_encoding_default();
+ if (r == NULL)
+ r = (char_u *)"latin1";
+ return vim_strsave(r);
+ }
+
+ /* copy "enc" to allocated memory, with room for two '-' */
+ r = alloc((unsigned)(STRLEN(enc) + 3));
+ /* Make it all lower case and replace '_' with '-'. */
+ p = r;
+ for (s = enc; *s != NUL; ++s) {
+ if (*s == '_')
+ *p++ = '-';
+ else
+ *p++ = TOLOWER_ASC(*s);
+ }
+ *p = NUL;
+
+ /* Skip "2byte-" and "8bit-". */
+ p = enc_skip(r);
+
+ /* Change "microsoft-cp" to "cp". Used in some spell files. */
+ if (STRNCMP(p, "microsoft-cp", 12) == 0)
+ STRMOVE(p, p + 10);
+
+ /* "iso8859" -> "iso-8859" */
+ if (STRNCMP(p, "iso8859", 7) == 0) {
+ STRMOVE(p + 4, p + 3);
+ p[3] = '-';
+ }
+
+ /* "iso-8859n" -> "iso-8859-n" */
+ if (STRNCMP(p, "iso-8859", 8) == 0 && p[8] != '-') {
+ STRMOVE(p + 9, p + 8);
+ p[8] = '-';
+ }
+
+ /* "latin-N" -> "latinN" */
+ if (STRNCMP(p, "latin-", 6) == 0)
+ STRMOVE(p + 5, p + 6);
+
+ if (enc_canon_search(p) >= 0) {
+ /* canonical name can be used unmodified */
+ if (p != r)
+ STRMOVE(r, p);
+ } else if ((i = enc_alias_search(p)) >= 0) {
+ /* alias recognized, get canonical name */
+ free(r);
+ r = vim_strsave((char_u *)enc_canon_table[i].name);
+ }
+ return r;
+}
+
+/*
+ * Search for an encoding alias of "name".
+ * Returns -1 when not found.
+ */
+static int enc_alias_search(char_u *name)
+{
+ int i;
+
+ for (i = 0; enc_alias_table[i].name != NULL; ++i)
+ if (STRCMP(name, enc_alias_table[i].name) == 0)
+ return enc_alias_table[i].canon;
+ return -1;
+}
+
+
+#ifdef HAVE_LANGINFO_H
+# include <langinfo.h>
+#endif
+
+/*
+ * Get the canonicalized encoding of the current locale.
+ * Returns an allocated string when successful, NULL when not.
+ */
+char_u * enc_locale()
+{
+ char *s;
+ char *p;
+ int i;
+ char buf[50];
+# ifdef HAVE_NL_LANGINFO_CODESET
+ if ((s = nl_langinfo(CODESET)) == NULL || *s == NUL)
+# endif
+# if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
+ if ((s = setlocale(LC_CTYPE, NULL)) == NULL || *s == NUL)
+# endif
+ if ((s = (char *)os_getenv("LC_ALL")) == NULL || *s == NUL)
+ if ((s = (char *)os_getenv("LC_CTYPE")) == NULL || *s == NUL)
+ s = (char *)os_getenv("LANG");
+
+ if (s == NULL || *s == NUL)
+ return FAIL;
+
+ /* The most generic locale format is:
+ * language[_territory][.codeset][@modifier][+special][,[sponsor][_revision]]
+ * If there is a '.' remove the part before it.
+ * if there is something after the codeset, remove it.
+ * Make the name lowercase and replace '_' with '-'.
+ * Exception: "ja_JP.EUC" == "euc-jp", "zh_CN.EUC" = "euc-cn",
+ * "ko_KR.EUC" == "euc-kr"
+ */
+ if ((p = (char *)vim_strchr((char_u *)s, '.')) != NULL) {
+ if (p > s + 2 && STRNICMP(p + 1, "EUC", 3) == 0
+ && !isalnum((int)p[4]) && p[4] != '-' && p[-3] == '_') {
+ /* copy "XY.EUC" to "euc-XY" to buf[10] */
+ STRCPY(buf + 10, "euc-");
+ buf[14] = p[-2];
+ buf[15] = p[-1];
+ buf[16] = 0;
+ s = buf + 10;
+ } else
+ s = p + 1;
+ }
+ for (i = 0; s[i] != NUL && i < (int)sizeof(buf) - 1; ++i) {
+ if (s[i] == '_' || s[i] == '-')
+ buf[i] = '-';
+ else if (isalnum((int)s[i]))
+ buf[i] = TOLOWER_ASC(s[i]);
+ else
+ break;
+ }
+ buf[i] = NUL;
+
+ return enc_canonize((char_u *)buf);
+}
+
+# if defined(USE_ICONV) || defined(PROTO)
+
+static char_u *
+iconv_string(vimconv_T *vcp, char_u *str, int slen, int *unconvlenp,
+ int *resultlenp);
+
+/*
+ * Call iconv_open() with a check if iconv() works properly (there are broken
+ * versions).
+ * Returns (void *)-1 if failed.
+ * (should return iconv_t, but that causes problems with prototypes).
+ */
+void * my_iconv_open(char_u *to, char_u *from)
+{
+ iconv_t fd;
+#define ICONV_TESTLEN 400
+ char_u tobuf[ICONV_TESTLEN];
+ char *p;
+ size_t tolen;
+ static int iconv_ok = -1;
+
+ if (iconv_ok == FALSE)
+ return (void *)-1; /* detected a broken iconv() previously */
+
+#ifdef DYNAMIC_ICONV
+ /* Check if the iconv.dll can be found. */
+ if (!iconv_enabled(TRUE))
+ return (void *)-1;
+#endif
+
+ fd = iconv_open((char *)enc_skip(to), (char *)enc_skip(from));
+
+ if (fd != (iconv_t)-1 && iconv_ok == -1) {
+ /*
+ * Do a dummy iconv() call to check if it actually works. There is a
+ * version of iconv() on Linux that is broken. We can't ignore it,
+ * because it's wide-spread. The symptoms are that after outputting
+ * the initial shift state the "to" pointer is NULL and conversion
+ * stops for no apparent reason after about 8160 characters.
+ */
+ p = (char *)tobuf;
+ tolen = ICONV_TESTLEN;
+ (void)iconv(fd, NULL, NULL, &p, &tolen);
+ if (p == NULL) {
+ iconv_ok = FALSE;
+ iconv_close(fd);
+ fd = (iconv_t)-1;
+ } else
+ iconv_ok = TRUE;
+ }
+
+ return (void *)fd;
+}
+
+/*
+ * Convert the string "str[slen]" with iconv().
+ * If "unconvlenp" is not NULL handle the string ending in an incomplete
+ * sequence and set "*unconvlenp" to the length of it.
+ * Returns the converted string in allocated memory. NULL for an error.
+ * If resultlenp is not NULL, sets it to the result length in bytes.
+ */
+static char_u * iconv_string(vimconv_T *vcp, char_u *str, int slen, int *unconvlenp, int *resultlenp)
+{
+ const char *from;
+ size_t fromlen;
+ char *to;
+ size_t tolen;
+ size_t len = 0;
+ size_t done = 0;
+ char_u *result = NULL;
+ char_u *p;
+ int l;
+
+ from = (char *)str;
+ fromlen = slen;
+ for (;; ) {
+ if (len == 0 || ICONV_ERRNO == ICONV_E2BIG) {
+ /* Allocate enough room for most conversions. When re-allocating
+ * increase the buffer size. */
+ len = len + fromlen * 2 + 40;
+ p = alloc((unsigned)len);
+ if (done > 0)
+ memmove(p, result, done);
+ free(result);
+ result = p;
+ if (result == NULL) /* out of memory */
+ break;
+ }
+
+ to = (char *)result + done;
+ tolen = len - done - 2;
+ /* Avoid a warning for systems with a wrong iconv() prototype by
+ * casting the second argument to void *. */
+ if (iconv(vcp->vc_fd, (void *)&from, &fromlen, &to, &tolen)
+ != (size_t)-1) {
+ /* Finished, append a NUL. */
+ *to = NUL;
+ break;
+ }
+
+ /* Check both ICONV_EINVAL and EINVAL, because the dynamically loaded
+ * iconv library may use one of them. */
+ if (!vcp->vc_fail && unconvlenp != NULL
+ && (ICONV_ERRNO == ICONV_EINVAL || ICONV_ERRNO == EINVAL)) {
+ /* Handle an incomplete sequence at the end. */
+ *to = NUL;
+ *unconvlenp = (int)fromlen;
+ break;
+ }
+ /* Check both ICONV_EILSEQ and EILSEQ, because the dynamically loaded
+ * iconv library may use one of them. */
+ else if (!vcp->vc_fail
+ && (ICONV_ERRNO == ICONV_EILSEQ || ICONV_ERRNO == EILSEQ
+ || ICONV_ERRNO == ICONV_EINVAL || ICONV_ERRNO == EINVAL)) {
+ /* Can't convert: insert a '?' and skip a character. This assumes
+ * conversion from 'encoding' to something else. In other
+ * situations we don't know what to skip anyway. */
+ *to++ = '?';
+ if ((*mb_ptr2cells)((char_u *)from) > 1)
+ *to++ = '?';
+ if (enc_utf8)
+ l = utfc_ptr2len_len((char_u *)from, (int)fromlen);
+ else {
+ l = (*mb_ptr2len)((char_u *)from);
+ if (l > (int)fromlen)
+ l = (int)fromlen;
+ }
+ from += l;
+ fromlen -= l;
+ } else if (ICONV_ERRNO != ICONV_E2BIG) {
+ /* conversion failed */
+ free(result);
+ result = NULL;
+ break;
+ }
+ /* Not enough room or skipping illegal sequence. */
+ done = to - (char *)result;
+ }
+
+ if (resultlenp != NULL && result != NULL)
+ *resultlenp = (int)(to - (char *)result);
+ return result;
+}
+
+# if defined(DYNAMIC_ICONV) || defined(PROTO)
+/*
+ * Dynamically load the "iconv.dll" on Win32.
+ */
+
+#ifndef DYNAMIC_ICONV /* just generating prototypes */
+# define HINSTANCE int
+#endif
+static HINSTANCE hIconvDLL = 0;
+static HINSTANCE hMsvcrtDLL = 0;
+
+# ifndef DYNAMIC_ICONV_DLL
+# define DYNAMIC_ICONV_DLL "iconv.dll"
+# define DYNAMIC_ICONV_DLL_ALT "libiconv.dll"
+# endif
+# ifndef DYNAMIC_MSVCRT_DLL
+# define DYNAMIC_MSVCRT_DLL "msvcrt.dll"
+# endif
+
+/*
+ * Get the address of 'funcname' which is imported by 'hInst' DLL.
+ */
+static void * get_iconv_import_func(HINSTANCE hInst,
+ const char *funcname)
+{
+ PBYTE pImage = (PBYTE)hInst;
+ PIMAGE_DOS_HEADER pDOS = (PIMAGE_DOS_HEADER)hInst;
+ PIMAGE_NT_HEADERS pPE;
+ PIMAGE_IMPORT_DESCRIPTOR pImpDesc;
+ PIMAGE_THUNK_DATA pIAT; /* Import Address Table */
+ PIMAGE_THUNK_DATA pINT; /* Import Name Table */
+ PIMAGE_IMPORT_BY_NAME pImpName;
+
+ if (pDOS->e_magic != IMAGE_DOS_SIGNATURE)
+ return NULL;
+ pPE = (PIMAGE_NT_HEADERS)(pImage + pDOS->e_lfanew);
+ if (pPE->Signature != IMAGE_NT_SIGNATURE)
+ return NULL;
+ pImpDesc = (PIMAGE_IMPORT_DESCRIPTOR)(pImage
+ + pPE->OptionalHeader.DataDirectory[
+ IMAGE_DIRECTORY_ENTRY_IMPORT]
+ .VirtualAddress);
+ for (; pImpDesc->FirstThunk; ++pImpDesc) {
+ if (!pImpDesc->OriginalFirstThunk)
+ continue;
+ pIAT = (PIMAGE_THUNK_DATA)(pImage + pImpDesc->FirstThunk);
+ pINT = (PIMAGE_THUNK_DATA)(pImage + pImpDesc->OriginalFirstThunk);
+ for (; pIAT->u1.Function; ++pIAT, ++pINT) {
+ if (IMAGE_SNAP_BY_ORDINAL(pINT->u1.Ordinal))
+ continue;
+ pImpName = (PIMAGE_IMPORT_BY_NAME)(pImage
+ + (UINT_PTR)(pINT->u1.AddressOfData));
+ if (strcmp(pImpName->Name, funcname) == 0)
+ return (void *)pIAT->u1.Function;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Try opening the iconv.dll and return TRUE if iconv() can be used.
+ */
+int iconv_enabled(int verbose)
+{
+ if (hIconvDLL != 0 && hMsvcrtDLL != 0)
+ return TRUE;
+ hIconvDLL = vimLoadLib(DYNAMIC_ICONV_DLL);
+ if (hIconvDLL == 0) /* sometimes it's called libiconv.dll */
+ hIconvDLL = vimLoadLib(DYNAMIC_ICONV_DLL_ALT);
+ if (hIconvDLL != 0)
+ hMsvcrtDLL = vimLoadLib(DYNAMIC_MSVCRT_DLL);
+ if (hIconvDLL == 0 || hMsvcrtDLL == 0) {
+ /* Only give the message when 'verbose' is set, otherwise it might be
+ * done whenever a conversion is attempted. */
+ if (verbose && p_verbose > 0) {
+ verbose_enter();
+ EMSG2(_(e_loadlib),
+ hIconvDLL == 0 ? DYNAMIC_ICONV_DLL : DYNAMIC_MSVCRT_DLL);
+ verbose_leave();
+ }
+ iconv_end();
+ return FALSE;
+ }
+
+ iconv = (void *)GetProcAddress(hIconvDLL, "libiconv");
+ iconv_open = (void *)GetProcAddress(hIconvDLL, "libiconv_open");
+ iconv_close = (void *)GetProcAddress(hIconvDLL, "libiconv_close");
+ iconvctl = (void *)GetProcAddress(hIconvDLL, "libiconvctl");
+ iconv_errno = get_iconv_import_func(hIconvDLL, "_errno");
+ if (iconv_errno == NULL)
+ iconv_errno = (void *)GetProcAddress(hMsvcrtDLL, "_errno");
+ if (iconv == NULL || iconv_open == NULL || iconv_close == NULL
+ || iconvctl == NULL || iconv_errno == NULL) {
+ iconv_end();
+ if (verbose && p_verbose > 0) {
+ verbose_enter();
+ EMSG2(_(e_loadfunc), "for libiconv");
+ verbose_leave();
+ }
+ return FALSE;
+ }
+ return TRUE;
+}
+
+void iconv_end()
+{
+ /* Don't use iconv() when inputting or outputting characters. */
+ if (input_conv.vc_type == CONV_ICONV)
+ convert_setup(&input_conv, NULL, NULL);
+ if (output_conv.vc_type == CONV_ICONV)
+ convert_setup(&output_conv, NULL, NULL);
+
+ if (hIconvDLL != 0)
+ FreeLibrary(hIconvDLL);
+ if (hMsvcrtDLL != 0)
+ FreeLibrary(hMsvcrtDLL);
+ hIconvDLL = 0;
+ hMsvcrtDLL = 0;
+}
+
+# endif /* DYNAMIC_ICONV */
+# endif /* USE_ICONV */
+
+
+
+
+/*
+ * Setup "vcp" for conversion from "from" to "to".
+ * The names must have been made canonical with enc_canonize().
+ * vcp->vc_type must have been initialized to CONV_NONE.
+ * Note: cannot be used for conversion from/to ucs-2 and ucs-4 (will use utf-8
+ * instead).
+ * Afterwards invoke with "from" and "to" equal to NULL to cleanup.
+ * Return FAIL when conversion is not supported, OK otherwise.
+ */
+int convert_setup(vcp, from, to)
+ vimconv_T *vcp;
+ char_u *from;
+ char_u *to;
+{
+ return convert_setup_ext(vcp, from, TRUE, to, TRUE);
+}
+
+/*
+ * As convert_setup(), but only when from_unicode_is_utf8 is TRUE will all
+ * "from" unicode charsets be considered utf-8. Same for "to".
+ */
+int convert_setup_ext(vcp, from, from_unicode_is_utf8, to, to_unicode_is_utf8)
+ vimconv_T *vcp;
+ char_u *from;
+ int from_unicode_is_utf8;
+ char_u *to;
+ int to_unicode_is_utf8;
+{
+ int from_prop;
+ int to_prop;
+ int from_is_utf8;
+ int to_is_utf8;
+
+ /* Reset to no conversion. */
+# ifdef USE_ICONV
+ if (vcp->vc_type == CONV_ICONV && vcp->vc_fd != (iconv_t)-1)
+ iconv_close(vcp->vc_fd);
+# endif
+ vcp->vc_type = CONV_NONE;
+ vcp->vc_factor = 1;
+ vcp->vc_fail = FALSE;
+
+ /* No conversion when one of the names is empty or they are equal. */
+ if (from == NULL || *from == NUL || to == NULL || *to == NUL
+ || STRCMP(from, to) == 0)
+ return OK;
+
+ from_prop = enc_canon_props(from);
+ to_prop = enc_canon_props(to);
+ if (from_unicode_is_utf8)
+ from_is_utf8 = from_prop & ENC_UNICODE;
+ else
+ from_is_utf8 = from_prop == ENC_UNICODE;
+ if (to_unicode_is_utf8)
+ to_is_utf8 = to_prop & ENC_UNICODE;
+ else
+ to_is_utf8 = to_prop == ENC_UNICODE;
+
+ if ((from_prop & ENC_LATIN1) && to_is_utf8) {
+ /* Internal latin1 -> utf-8 conversion. */
+ vcp->vc_type = CONV_TO_UTF8;
+ vcp->vc_factor = 2; /* up to twice as long */
+ } else if ((from_prop & ENC_LATIN9) && to_is_utf8) {
+ /* Internal latin9 -> utf-8 conversion. */
+ vcp->vc_type = CONV_9_TO_UTF8;
+ vcp->vc_factor = 3; /* up to three as long (euro sign) */
+ } else if (from_is_utf8 && (to_prop & ENC_LATIN1)) {
+ /* Internal utf-8 -> latin1 conversion. */
+ vcp->vc_type = CONV_TO_LATIN1;
+ } else if (from_is_utf8 && (to_prop & ENC_LATIN9)) {
+ /* Internal utf-8 -> latin9 conversion. */
+ vcp->vc_type = CONV_TO_LATIN9;
+ }
+# ifdef USE_ICONV
+ else {
+ /* Use iconv() for conversion. */
+ vcp->vc_fd = (iconv_t)my_iconv_open(
+ to_is_utf8 ? (char_u *)"utf-8" : to,
+ from_is_utf8 ? (char_u *)"utf-8" : from);
+ if (vcp->vc_fd != (iconv_t)-1) {
+ vcp->vc_type = CONV_ICONV;
+ vcp->vc_factor = 4; /* could be longer too... */
+ }
+ }
+# endif
+ if (vcp->vc_type == CONV_NONE)
+ return FAIL;
+
+ return OK;
+}
+
+#if defined(FEAT_GUI) || defined(WIN3264) || defined(PROTO)
+/*
+ * Do conversion on typed input characters in-place.
+ * The input and output are not NUL terminated!
+ * Returns the length after conversion.
+ */
+int convert_input(ptr, len, maxlen)
+ char_u *ptr;
+ int len;
+ int maxlen;
+{
+ return convert_input_safe(ptr, len, maxlen, NULL, NULL);
+}
+#endif
+
+/*
+ * Like convert_input(), but when there is an incomplete byte sequence at the
+ * end return that as an allocated string in "restp" and set "*restlenp" to
+ * the length. If "restp" is NULL it is not used.
+ */
+int convert_input_safe(ptr, len, maxlen, restp, restlenp)
+ char_u *ptr;
+ int len;
+ int maxlen;
+ char_u **restp;
+ int *restlenp;
+{
+ char_u *d;
+ int dlen = len;
+ int unconvertlen = 0;
+
+ d = string_convert_ext(&input_conv, ptr, &dlen,
+ restp == NULL ? NULL : &unconvertlen);
+ if (d != NULL) {
+ if (dlen <= maxlen) {
+ if (unconvertlen > 0) {
+ /* Move the unconverted characters to allocated memory. */
+ *restp = alloc(unconvertlen);
+ memmove(*restp, ptr + len - unconvertlen, unconvertlen);
+ *restlenp = unconvertlen;
+ }
+ memmove(ptr, d, dlen);
+ } else
+ /* result is too long, keep the unconverted text (the caller must
+ * have done something wrong!) */
+ dlen = len;
+ free(d);
+ }
+ return dlen;
+}
+
+/*
+ * Convert text "ptr[*lenp]" according to "vcp".
+ * Returns the result in allocated memory and sets "*lenp".
+ * When "lenp" is NULL, use NUL terminated strings.
+ * Illegal chars are often changed to "?", unless vcp->vc_fail is set.
+ * When something goes wrong, NULL is returned and "*lenp" is unchanged.
+ */
+char_u * string_convert(vcp, ptr, lenp)
+ vimconv_T *vcp;
+ char_u *ptr;
+ int *lenp;
+{
+ return string_convert_ext(vcp, ptr, lenp, NULL);
+}
+
+/*
+ * Like string_convert(), but when "unconvlenp" is not NULL and there are is
+ * an incomplete sequence at the end it is not converted and "*unconvlenp" is
+ * set to the number of remaining bytes.
+ */
+char_u * string_convert_ext(vcp, ptr, lenp, unconvlenp)
+ vimconv_T *vcp;
+ char_u *ptr;
+ int *lenp;
+ int *unconvlenp;
+{
+ char_u *retval = NULL;
+ char_u *d;
+ int len;
+ int i;
+ int l;
+ int c;
+
+ if (lenp == NULL)
+ len = (int)STRLEN(ptr);
+ else
+ len = *lenp;
+ if (len == 0)
+ return vim_strsave((char_u *)"");
+
+ switch (vcp->vc_type) {
+ case CONV_TO_UTF8: /* latin1 to utf-8 conversion */
+ retval = alloc(len * 2 + 1);
+ d = retval;
+ for (i = 0; i < len; ++i) {
+ c = ptr[i];
+ if (c < 0x80)
+ *d++ = c;
+ else {
+ *d++ = 0xc0 + ((unsigned)c >> 6);
+ *d++ = 0x80 + (c & 0x3f);
+ }
+ }
+ *d = NUL;
+ if (lenp != NULL)
+ *lenp = (int)(d - retval);
+ break;
+
+ case CONV_9_TO_UTF8: /* latin9 to utf-8 conversion */
+ retval = alloc(len * 3 + 1);
+ d = retval;
+ for (i = 0; i < len; ++i) {
+ c = ptr[i];
+ switch (c) {
+ case 0xa4: c = 0x20ac; break; /* euro */
+ case 0xa6: c = 0x0160; break; /* S hat */
+ case 0xa8: c = 0x0161; break; /* S -hat */
+ case 0xb4: c = 0x017d; break; /* Z hat */
+ case 0xb8: c = 0x017e; break; /* Z -hat */
+ case 0xbc: c = 0x0152; break; /* OE */
+ case 0xbd: c = 0x0153; break; /* oe */
+ case 0xbe: c = 0x0178; break; /* Y */
+ }
+ d += utf_char2bytes(c, d);
+ }
+ *d = NUL;
+ if (lenp != NULL)
+ *lenp = (int)(d - retval);
+ break;
+
+ case CONV_TO_LATIN1: /* utf-8 to latin1 conversion */
+ case CONV_TO_LATIN9: /* utf-8 to latin9 conversion */
+ retval = alloc(len + 1);
+ d = retval;
+ for (i = 0; i < len; ++i) {
+ l = utf_ptr2len_len(ptr + i, len - i);
+ if (l == 0)
+ *d++ = NUL;
+ else if (l == 1) {
+ int l_w = utf8len_tab_zero[ptr[i]];
+
+ if (l_w == 0) {
+ /* Illegal utf-8 byte cannot be converted */
+ free(retval);
+ return NULL;
+ }
+ if (unconvlenp != NULL && l_w > len - i) {
+ /* Incomplete sequence at the end. */
+ *unconvlenp = len - i;
+ break;
+ }
+ *d++ = ptr[i];
+ } else {
+ c = utf_ptr2char(ptr + i);
+ if (vcp->vc_type == CONV_TO_LATIN9)
+ switch (c) {
+ case 0x20ac: c = 0xa4; break; /* euro */
+ case 0x0160: c = 0xa6; break; /* S hat */
+ case 0x0161: c = 0xa8; break; /* S -hat */
+ case 0x017d: c = 0xb4; break; /* Z hat */
+ case 0x017e: c = 0xb8; break; /* Z -hat */
+ case 0x0152: c = 0xbc; break; /* OE */
+ case 0x0153: c = 0xbd; break; /* oe */
+ case 0x0178: c = 0xbe; break; /* Y */
+ case 0xa4:
+ case 0xa6:
+ case 0xa8:
+ case 0xb4:
+ case 0xb8:
+ case 0xbc:
+ case 0xbd:
+ case 0xbe: c = 0x100; break; /* not in latin9 */
+ }
+ if (!utf_iscomposing(c)) { /* skip composing chars */
+ if (c < 0x100)
+ *d++ = c;
+ else if (vcp->vc_fail) {
+ free(retval);
+ return NULL;
+ } else {
+ *d++ = 0xbf;
+ if (utf_char2cells(c) > 1)
+ *d++ = '?';
+ }
+ }
+ i += l - 1;
+ }
+ }
+ *d = NUL;
+ if (lenp != NULL)
+ *lenp = (int)(d - retval);
+ break;
+
+# ifdef MACOS_CONVERT
+ case CONV_MAC_LATIN1:
+ retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
+ 'm', 'l', unconvlenp);
+ break;
+
+ case CONV_LATIN1_MAC:
+ retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
+ 'l', 'm', unconvlenp);
+ break;
+
+ case CONV_MAC_UTF8:
+ retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
+ 'm', 'u', unconvlenp);
+ break;
+
+ case CONV_UTF8_MAC:
+ retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
+ 'u', 'm', unconvlenp);
+ break;
+# endif
+
+# ifdef USE_ICONV
+ case CONV_ICONV: /* conversion with output_conv.vc_fd */
+ retval = iconv_string(vcp, ptr, len, unconvlenp, lenp);
+ break;
+# endif
+ }
+
+ return retval;
+}
generated by cgit (git 2.34.1) at 2025-04-28 22:28:54 +0000