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Diffstat (limited to 'src/syntax.c')
| -rw-r--r-- | src/syntax.c | 7818 |
1 files changed, 0 insertions, 7818 deletions
diff --git a/src/syntax.c b/src/syntax.c deleted file mode 100644 index 41128868fc..0000000000 --- a/src/syntax.c +++ /dev/null @@ -1,7818 +0,0 @@ -/* - * VIM - Vi IMproved by Bram Moolenaar - * - * 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. - */ - -/* - * syntax.c: code for syntax highlighting - */ - -#include <string.h> -#include <stdlib.h> - -#include "vim.h" -#include "syntax.h" -#include "charset.h" -#include "eval.h" -#include "ex_cmds2.h" -#include "ex_docmd.h" -#include "fileio.h" -#include "fold.h" -#include "hashtab.h" -#include "indent_c.h" -#include "mbyte.h" -#include "memline.h" -#include "memory.h" -#include "message.h" -#include "misc1.h" -#include "misc2.h" -#include "keymap.h" -#include "garray.h" -#include "option.h" -#include "os_unix.h" -#include "path.h" -#include "regexp.h" -#include "screen.h" -#include "term.h" -#include "ui.h" -#include "os/os.h" - -/* - * Structure that stores information about a highlight group. - * The ID of a highlight group is also called group ID. It is the index in - * the highlight_ga array PLUS ONE. - */ -struct hl_group { - char_u *sg_name; /* highlight group name */ - char_u *sg_name_u; /* uppercase of sg_name */ - /* for normal terminals */ - int sg_term; /* "term=" highlighting attributes */ - char_u *sg_start; /* terminal string for start highl */ - char_u *sg_stop; /* terminal string for stop highl */ - int sg_term_attr; /* Screen attr for term mode */ - /* for color terminals */ - int sg_cterm; /* "cterm=" highlighting attr */ - int sg_cterm_bold; /* bold attr was set for light color */ - int sg_cterm_fg; /* terminal fg color number + 1 */ - int sg_cterm_bg; /* terminal bg color number + 1 */ - int sg_cterm_attr; /* Screen attr for color term mode */ - /* Store the sp color name for the GUI or synIDattr() */ - int sg_gui; /* "gui=" highlighting attributes */ - char_u *sg_gui_fg_name; /* GUI foreground color name */ - char_u *sg_gui_bg_name; /* GUI background color name */ - char_u *sg_gui_sp_name; /* GUI special color name */ - int sg_link; /* link to this highlight group ID */ - int sg_set; /* combination of SG_* flags */ - scid_T sg_scriptID; /* script in which the group was last set */ -}; - -#define SG_TERM 1 /* term has been set */ -#define SG_CTERM 2 /* cterm has been set */ -#define SG_GUI 4 /* gui has been set */ -#define SG_LINK 8 /* link has been set */ - -static garray_T highlight_ga; /* highlight groups for 'highlight' option */ - -#define HL_TABLE() ((struct hl_group *)((highlight_ga.ga_data))) - -#define MAX_HL_ID 20000 /* maximum value for a highlight ID. */ - -/* Flags to indicate an additional string for highlight name completion. */ -static int include_none = 0; /* when 1 include "None" */ -static int include_default = 0; /* when 1 include "default" */ -static int include_link = 0; /* when 2 include "link" and "clear" */ - -/* - * The "term", "cterm" and "gui" arguments can be any combination of the - * following names, separated by commas (but no spaces!). - */ -static char *(hl_name_table[]) = -{"bold", "standout", "underline", "undercurl", - "italic", "reverse", "inverse", "NONE"}; -static int hl_attr_table[] = -{HL_BOLD, HL_STANDOUT, HL_UNDERLINE, HL_UNDERCURL, HL_ITALIC, HL_INVERSE, - HL_INVERSE, 0}; - -static int get_attr_entry(garray_T *table, attrentry_T *aep); -static void syn_unadd_group(void); -static void set_hl_attr(int idx); -static void highlight_list_one(int id); -static int highlight_list_arg(int id, int didh, int type, int iarg, - char_u *sarg, - char *name); -static int syn_add_group(char_u *name); -static int syn_list_header(int did_header, int outlen, int id); -static int hl_has_settings(int idx, int check_link); -static void highlight_clear(int idx); - - -/* - * An attribute number is the index in attr_table plus ATTR_OFF. - */ -#define ATTR_OFF (HL_ALL + 1) - - -#define SYN_NAMELEN 50 /* maximum length of a syntax name */ - -/* different types of offsets that are possible */ -#define SPO_MS_OFF 0 /* match start offset */ -#define SPO_ME_OFF 1 /* match end offset */ -#define SPO_HS_OFF 2 /* highl. start offset */ -#define SPO_HE_OFF 3 /* highl. end offset */ -#define SPO_RS_OFF 4 /* region start offset */ -#define SPO_RE_OFF 5 /* region end offset */ -#define SPO_LC_OFF 6 /* leading context offset */ -#define SPO_COUNT 7 - -static char *(spo_name_tab[SPO_COUNT]) = -{"ms=", "me=", "hs=", "he=", "rs=", "re=", "lc="}; - -/* - * The patterns that are being searched for are stored in a syn_pattern. - * A match item consists of one pattern. - * A start/end item consists of n start patterns and m end patterns. - * A start/skip/end item consists of n start patterns, one skip pattern and m - * end patterns. - * For the latter two, the patterns are always consecutive: start-skip-end. - * - * A character offset can be given for the matched text (_m_start and _m_end) - * and for the actually highlighted text (_h_start and _h_end). - */ -typedef struct syn_pattern { - char sp_type; /* see SPTYPE_ defines below */ - char sp_syncing; /* this item used for syncing */ - int sp_flags; /* see HL_ defines below */ - int sp_cchar; /* conceal substitute character */ - struct sp_syn sp_syn; /* struct passed to in_id_list() */ - short sp_syn_match_id; /* highlight group ID of pattern */ - char_u *sp_pattern; /* regexp to match, pattern */ - regprog_T *sp_prog; /* regexp to match, program */ - syn_time_T sp_time; - int sp_ic; /* ignore-case flag for sp_prog */ - short sp_off_flags; /* see below */ - int sp_offsets[SPO_COUNT]; /* offsets */ - short *sp_cont_list; /* cont. group IDs, if non-zero */ - short *sp_next_list; /* next group IDs, if non-zero */ - int sp_sync_idx; /* sync item index (syncing only) */ - int sp_line_id; /* ID of last line where tried */ - int sp_startcol; /* next match in sp_line_id line */ -} synpat_T; - -/* The sp_off_flags are computed like this: - * offset from the start of the matched text: (1 << SPO_XX_OFF) - * offset from the end of the matched text: (1 << (SPO_XX_OFF + SPO_COUNT)) - * When both are present, only one is used. - */ - -#define SPTYPE_MATCH 1 /* match keyword with this group ID */ -#define SPTYPE_START 2 /* match a regexp, start of item */ -#define SPTYPE_END 3 /* match a regexp, end of item */ -#define SPTYPE_SKIP 4 /* match a regexp, skip within item */ - - -#define SYN_ITEMS(buf) ((synpat_T *)((buf)->b_syn_patterns.ga_data)) - -#define NONE_IDX -2 /* value of sp_sync_idx for "NONE" */ - -/* - * Flags for b_syn_sync_flags: - */ -#define SF_CCOMMENT 0x01 /* sync on a C-style comment */ -#define SF_MATCH 0x02 /* sync by matching a pattern */ - -#define SYN_STATE_P(ssp) ((bufstate_T *)((ssp)->ga_data)) - -#define MAXKEYWLEN 80 /* maximum length of a keyword */ - -/* - * The attributes of the syntax item that has been recognized. - */ -static int current_attr = 0; /* attr of current syntax word */ -static int current_id = 0; /* ID of current char for syn_get_id() */ -static int current_trans_id = 0; /* idem, transparency removed */ -static int current_flags = 0; -static int current_seqnr = 0; -static int current_sub_char = 0; - -typedef struct syn_cluster_S { - char_u *scl_name; /* syntax cluster name */ - char_u *scl_name_u; /* uppercase of scl_name */ - short *scl_list; /* IDs in this syntax cluster */ -} syn_cluster_T; - -/* - * Methods of combining two clusters - */ -#define CLUSTER_REPLACE 1 /* replace first list with second */ -#define CLUSTER_ADD 2 /* add second list to first */ -#define CLUSTER_SUBTRACT 3 /* subtract second list from first */ - -#define SYN_CLSTR(buf) ((syn_cluster_T *)((buf)->b_syn_clusters.ga_data)) - -/* - * Syntax group IDs have different types: - * 0 - 19999 normal syntax groups - * 20000 - 20999 ALLBUT indicator (current_syn_inc_tag added) - * 21000 - 21999 TOP indicator (current_syn_inc_tag added) - * 22000 - 22999 CONTAINED indicator (current_syn_inc_tag added) - * 23000 - 32767 cluster IDs (subtract SYNID_CLUSTER for the cluster ID) - */ -#define SYNID_ALLBUT MAX_HL_ID /* syntax group ID for contains=ALLBUT */ -#define SYNID_TOP 21000 /* syntax group ID for contains=TOP */ -#define SYNID_CONTAINED 22000 /* syntax group ID for contains=CONTAINED */ -#define SYNID_CLUSTER 23000 /* first syntax group ID for clusters */ - -#define MAX_SYN_INC_TAG 999 /* maximum before the above overflow */ -#define MAX_CLUSTER_ID (32767 - SYNID_CLUSTER) - -/* - * Annoying Hack(TM): ":syn include" needs this pointer to pass to - * expand_filename(). Most of the other syntax commands don't need it, so - * instead of passing it to them, we stow it here. - */ -static char_u **syn_cmdlinep; - -/* - * Another Annoying Hack(TM): To prevent rules from other ":syn include"'d - * files from leaking into ALLBUT lists, we assign a unique ID to the - * rules in each ":syn include"'d file. - */ -static int current_syn_inc_tag = 0; -static int running_syn_inc_tag = 0; - -/* - * In a hashtable item "hi_key" points to "keyword" in a keyentry. - * This avoids adding a pointer to the hashtable item. - * KE2HIKEY() converts a var pointer to a hashitem key pointer. - * HIKEY2KE() converts a hashitem key pointer to a var pointer. - * HI2KE() converts a hashitem pointer to a var pointer. - */ -static keyentry_T dumkey; -#define KE2HIKEY(kp) ((kp)->keyword) -#define HIKEY2KE(p) ((keyentry_T *)((p) - (dumkey.keyword - (char_u *)&dumkey))) -#define HI2KE(hi) HIKEY2KE((hi)->hi_key) - -/* - * To reduce the time spent in keepend(), remember at which level in the state - * stack the first item with "keepend" is present. When "-1", there is no - * "keepend" on the stack. - */ -static int keepend_level = -1; - -static char msg_no_items[] = N_("No Syntax items defined for this buffer"); - -/* - * For the current state we need to remember more than just the idx. - * When si_m_endpos.lnum is 0, the items other than si_idx are unknown. - * (The end positions have the column number of the next char) - */ -typedef struct state_item { - int si_idx; /* index of syntax pattern or - KEYWORD_IDX */ - int si_id; /* highlight group ID for keywords */ - int si_trans_id; /* idem, transparency removed */ - int si_m_lnum; /* lnum of the match */ - int si_m_startcol; /* starting column of the match */ - lpos_T si_m_endpos; /* just after end posn of the match */ - lpos_T si_h_startpos; /* start position of the highlighting */ - lpos_T si_h_endpos; /* end position of the highlighting */ - lpos_T si_eoe_pos; /* end position of end pattern */ - int si_end_idx; /* group ID for end pattern or zero */ - int si_ends; /* if match ends before si_m_endpos */ - int si_attr; /* attributes in this state */ - long si_flags; /* HL_HAS_EOL flag in this state, and - * HL_SKIP* for si_next_list */ - int si_seqnr; /* sequence number */ - int si_cchar; /* substitution character for conceal */ - short *si_cont_list; /* list of contained groups */ - short *si_next_list; /* nextgroup IDs after this item ends */ - reg_extmatch_T *si_extmatch; /* \z(...\) matches from start - * pattern */ -} stateitem_T; - -#define KEYWORD_IDX -1 /* value of si_idx for keywords */ -#define ID_LIST_ALL (short *)-1 /* valid of si_cont_list for containing all - but contained groups */ - -static int next_seqnr = 0; /* value to use for si_seqnr */ - -/* - * Struct to reduce the number of arguments to get_syn_options(), it's used - * very often. - */ -typedef struct { - int flags; /* flags for contained and transparent */ - int keyword; /* TRUE for ":syn keyword" */ - int *sync_idx; /* syntax item for "grouphere" argument, NULL - if not allowed */ - char has_cont_list; /* TRUE if "cont_list" can be used */ - short *cont_list; /* group IDs for "contains" argument */ - short *cont_in_list; /* group IDs for "containedin" argument */ - short *next_list; /* group IDs for "nextgroup" argument */ -} syn_opt_arg_T; - -/* - * The next possible match in the current line for any pattern is remembered, - * to avoid having to try for a match in each column. - * If next_match_idx == -1, not tried (in this line) yet. - * If next_match_col == MAXCOL, no match found in this line. - * (All end positions have the column of the char after the end) - */ -static int next_match_col; /* column for start of next match */ -static lpos_T next_match_m_endpos; /* position for end of next match */ -static lpos_T next_match_h_startpos; /* pos. for highl. start of next match */ -static lpos_T next_match_h_endpos; /* pos. for highl. end of next match */ -static int next_match_idx; /* index of matched item */ -static long next_match_flags; /* flags for next match */ -static lpos_T next_match_eos_pos; /* end of start pattn (start region) */ -static lpos_T next_match_eoe_pos; /* pos. for end of end pattern */ -static int next_match_end_idx; /* ID of group for end pattn or zero */ -static reg_extmatch_T *next_match_extmatch = NULL; - -/* - * A state stack is an array of integers or stateitem_T, stored in a - * garray_T. A state stack is invalid if it's itemsize entry is zero. - */ -#define INVALID_STATE(ssp) ((ssp)->ga_itemsize == 0) -#define VALID_STATE(ssp) ((ssp)->ga_itemsize != 0) - -/* - * The current state (within the line) of the recognition engine. - * When current_state.ga_itemsize is 0 the current state is invalid. - */ -static win_T *syn_win; /* current window for highlighting */ -static buf_T *syn_buf; /* current buffer for highlighting */ -static synblock_T *syn_block; /* current buffer for highlighting */ -static linenr_T current_lnum = 0; /* lnum of current state */ -static colnr_T current_col = 0; /* column of current state */ -static int current_state_stored = 0; /* TRUE if stored current state - * after setting current_finished */ -static int current_finished = 0; /* current line has been finished */ -static garray_T current_state /* current stack of state_items */ - = {0, 0, 0, 0, NULL}; -static short *current_next_list = NULL; /* when non-zero, nextgroup list */ -static int current_next_flags = 0; /* flags for current_next_list */ -static int current_line_id = 0; /* unique number for current line */ - -#define CUR_STATE(idx) ((stateitem_T *)(current_state.ga_data))[idx] - -static void syn_sync(win_T *wp, linenr_T lnum, synstate_T *last_valid); -static int syn_match_linecont(linenr_T lnum); -static void syn_start_line(void); -static void syn_update_ends(int startofline); -static void syn_stack_alloc(void); -static int syn_stack_cleanup(void); -static void syn_stack_free_entry(synblock_T *block, synstate_T *p); -static synstate_T *syn_stack_find_entry(linenr_T lnum); -static synstate_T *store_current_state(void); -static void load_current_state(synstate_T *from); -static void invalidate_current_state(void); -static int syn_stack_equal(synstate_T *sp); -static void validate_current_state(void); -static int syn_finish_line(int syncing); -static int syn_current_attr(int syncing, int displaying, int *can_spell, - int keep_state); -static int did_match_already(int idx, garray_T *gap); -static stateitem_T *push_next_match(stateitem_T *cur_si); -static void check_state_ends(void); -static void update_si_attr(int idx); -static void check_keepend(void); -static void update_si_end(stateitem_T *sip, int startcol, int force); -static short *copy_id_list(short *list); -static int in_id_list(stateitem_T *item, short *cont_list, - struct sp_syn *ssp, - int contained); -static void push_current_state(int idx); -static void pop_current_state(void); -static void syn_clear_time(syn_time_T *tt); -static void syntime_clear(void); -static int syn_compare_syntime(const void *v1, const void *v2); -static void syntime_report(void); -static int syn_time_on = FALSE; -# define IF_SYN_TIME(p) (p) - -static void syn_stack_apply_changes_block(synblock_T *block, buf_T *buf); -static void find_endpos(int idx, lpos_T *startpos, lpos_T *m_endpos, - lpos_T *hl_endpos, long *flagsp, lpos_T *end_endpos, - int *end_idx, reg_extmatch_T *start_ext); -static void clear_syn_state(synstate_T *p); -static void clear_current_state(void); - -static void limit_pos(lpos_T *pos, lpos_T *limit); -static void limit_pos_zero(lpos_T *pos, lpos_T *limit); -static void syn_add_end_off(lpos_T *result, regmmatch_T *regmatch, - synpat_T *spp, int idx, - int extra); -static void syn_add_start_off(lpos_T *result, regmmatch_T *regmatch, - synpat_T *spp, int idx, - int extra); -static char_u *syn_getcurline(void); -static int syn_regexec(regmmatch_T *rmp, linenr_T lnum, colnr_T col, - syn_time_T *st); -static int check_keyword_id(char_u *line, int startcol, int *endcol, - long *flags, short **next_list, - stateitem_T *cur_si, - int *ccharp); -static keyentry_T *match_keyword(char_u *keyword, hashtab_T *ht, - stateitem_T *cur_si); -static void syn_cmd_case(exarg_T *eap, int syncing); -static void syn_cmd_spell(exarg_T *eap, int syncing); -static void syntax_sync_clear(void); -static void syn_remove_pattern(synblock_T *block, int idx); -static void syn_clear_pattern(synblock_T *block, int i); -static void syn_clear_cluster(synblock_T *block, int i); -static void syn_cmd_clear(exarg_T *eap, int syncing); -static void syn_cmd_conceal(exarg_T *eap, int syncing); -static void syn_clear_one(int id, int syncing); -static void syn_cmd_on(exarg_T *eap, int syncing); -static void syn_cmd_enable(exarg_T *eap, int syncing); -static void syn_cmd_reset(exarg_T *eap, int syncing); -static void syn_cmd_manual(exarg_T *eap, int syncing); -static void syn_cmd_off(exarg_T *eap, int syncing); -static void syn_cmd_onoff(exarg_T *eap, char *name); -static void syn_cmd_list(exarg_T *eap, int syncing); -static void syn_lines_msg(void); -static void syn_match_msg(void); -static void syn_stack_free_block(synblock_T *block); -static void syn_list_one(int id, int syncing, int link_only); -static void syn_list_cluster(int id); -static void put_id_list(char_u *name, short *list, int attr); -static void put_pattern(char *s, int c, synpat_T *spp, int attr); -static int syn_list_keywords(int id, hashtab_T *ht, int did_header, - int attr); -static void syn_clear_keyword(int id, hashtab_T *ht); -static void clear_keywtab(hashtab_T *ht); -static void add_keyword(char_u *name, int id, int flags, - short *cont_in_list, short *next_list, - int conceal_char); -static char_u *get_group_name(char_u *arg, char_u **name_end); -static char_u *get_syn_options(char_u *arg, syn_opt_arg_T *opt, - int *conceal_char); -static void syn_cmd_include(exarg_T *eap, int syncing); -static void syn_cmd_keyword(exarg_T *eap, int syncing); -static void syn_cmd_match(exarg_T *eap, int syncing); -static void syn_cmd_region(exarg_T *eap, int syncing); -static int syn_compare_stub(const void *v1, const void *v2); -static void syn_cmd_cluster(exarg_T *eap, int syncing); -static int syn_scl_name2id(char_u *name); -static int syn_scl_namen2id(char_u *linep, int len); -static int syn_check_cluster(char_u *pp, int len); -static int syn_add_cluster(char_u *name); -static void init_syn_patterns(void); -static char_u *get_syn_pattern(char_u *arg, synpat_T *ci); -static void syn_cmd_sync(exarg_T *eap, int syncing); -static int get_id_list(char_u **arg, int keylen, short **list); -static void syn_combine_list(short **clstr1, short **clstr2, - int list_op); -static void syn_incl_toplevel(int id, int *flagsp); - -/* - * Start the syntax recognition for a line. This function is normally called - * from the screen updating, once for each displayed line. - * The buffer is remembered in syn_buf, because get_syntax_attr() doesn't get - * it. Careful: curbuf and curwin are likely to point to another buffer and - * window. - */ -void syntax_start(win_T *wp, linenr_T lnum) -{ - synstate_T *p; - synstate_T *last_valid = NULL; - synstate_T *last_min_valid = NULL; - synstate_T *sp, *prev = NULL; - linenr_T parsed_lnum; - linenr_T first_stored; - int dist; - static int changedtick = 0; /* remember the last change ID */ - - current_sub_char = NUL; - - /* - * After switching buffers, invalidate current_state. - * Also do this when a change was made, the current state may be invalid - * then. - */ - if (syn_block != wp->w_s || changedtick != syn_buf->b_changedtick) { - invalidate_current_state(); - syn_buf = wp->w_buffer; - syn_block = wp->w_s; - } - changedtick = syn_buf->b_changedtick; - syn_win = wp; - - /* - * Allocate syntax stack when needed. - */ - syn_stack_alloc(); - if (syn_block->b_sst_array == NULL) - return; /* out of memory */ - syn_block->b_sst_lasttick = display_tick; - - /* - * If the state of the end of the previous line is useful, store it. - */ - if (VALID_STATE(¤t_state) - && current_lnum < lnum - && current_lnum < syn_buf->b_ml.ml_line_count) { - (void)syn_finish_line(FALSE); - if (!current_state_stored) { - ++current_lnum; - (void)store_current_state(); - } - - /* - * If the current_lnum is now the same as "lnum", keep the current - * state (this happens very often!). Otherwise invalidate - * current_state and figure it out below. - */ - if (current_lnum != lnum) - invalidate_current_state(); - } else - invalidate_current_state(); - - /* - * Try to synchronize from a saved state in b_sst_array[]. - * Only do this if lnum is not before and not to far beyond a saved state. - */ - if (INVALID_STATE(¤t_state) && syn_block->b_sst_array != NULL) { - /* Find last valid saved state before start_lnum. */ - for (p = syn_block->b_sst_first; p != NULL; p = p->sst_next) { - if (p->sst_lnum > lnum) - break; - if (p->sst_lnum <= lnum && p->sst_change_lnum == 0) { - last_valid = p; - if (p->sst_lnum >= lnum - syn_block->b_syn_sync_minlines) - last_min_valid = p; - } - } - if (last_min_valid != NULL) - load_current_state(last_min_valid); - } - - /* - * If "lnum" is before or far beyond a line with a saved state, need to - * re-synchronize. - */ - if (INVALID_STATE(¤t_state)) { - syn_sync(wp, lnum, last_valid); - if (current_lnum == 1) - /* First line is always valid, no matter "minlines". */ - first_stored = 1; - else - /* Need to parse "minlines" lines before state can be considered - * valid to store. */ - first_stored = current_lnum + syn_block->b_syn_sync_minlines; - } else - first_stored = current_lnum; - - /* - * Advance from the sync point or saved state until the current line. - * Save some entries for syncing with later on. - */ - if (syn_block->b_sst_len <= Rows) - dist = 999999; - else - dist = syn_buf->b_ml.ml_line_count / (syn_block->b_sst_len - Rows) + 1; - while (current_lnum < lnum) { - syn_start_line(); - (void)syn_finish_line(FALSE); - ++current_lnum; - - /* If we parsed at least "minlines" lines or started at a valid - * state, the current state is considered valid. */ - if (current_lnum >= first_stored) { - /* Check if the saved state entry is for the current line and is - * equal to the current state. If so, then validate all saved - * states that depended on a change before the parsed line. */ - if (prev == NULL) - prev = syn_stack_find_entry(current_lnum - 1); - if (prev == NULL) - sp = syn_block->b_sst_first; - else - sp = prev; - while (sp != NULL && sp->sst_lnum < current_lnum) - sp = sp->sst_next; - if (sp != NULL - && sp->sst_lnum == current_lnum - && syn_stack_equal(sp)) { - parsed_lnum = current_lnum; - prev = sp; - while (sp != NULL && sp->sst_change_lnum <= parsed_lnum) { - if (sp->sst_lnum <= lnum) - /* valid state before desired line, use this one */ - prev = sp; - else if (sp->sst_change_lnum == 0) - /* past saved states depending on change, break here. */ - break; - sp->sst_change_lnum = 0; - sp = sp->sst_next; - } - load_current_state(prev); - } - /* Store the state at this line when it's the first one, the line - * where we start parsing, or some distance from the previously - * saved state. But only when parsed at least 'minlines'. */ - else if (prev == NULL - || current_lnum == lnum - || current_lnum >= prev->sst_lnum + dist) - prev = store_current_state(); - } - - /* This can take a long time: break when CTRL-C pressed. The current - * state will be wrong then. */ - line_breakcheck(); - if (got_int) { - current_lnum = lnum; - break; - } - } - - syn_start_line(); -} - -/* - * We cannot simply discard growarrays full of state_items or buf_states; we - * have to manually release their extmatch pointers first. - */ -static void clear_syn_state(synstate_T *p) -{ - int i; - garray_T *gap; - - if (p->sst_stacksize > SST_FIX_STATES) { - gap = &(p->sst_union.sst_ga); - for (i = 0; i < gap->ga_len; i++) - unref_extmatch(SYN_STATE_P(gap)[i].bs_extmatch); - ga_clear(gap); - } else { - for (i = 0; i < p->sst_stacksize; i++) - unref_extmatch(p->sst_union.sst_stack[i].bs_extmatch); - } -} - -/* - * Cleanup the current_state stack. - */ -static void clear_current_state(void) -{ - int i; - stateitem_T *sip; - - sip = (stateitem_T *)(current_state.ga_data); - for (i = 0; i < current_state.ga_len; i++) - unref_extmatch(sip[i].si_extmatch); - ga_clear(¤t_state); -} - -/* - * Try to find a synchronisation point for line "lnum". - * - * This sets current_lnum and the current state. One of three methods is - * used: - * 1. Search backwards for the end of a C-comment. - * 2. Search backwards for given sync patterns. - * 3. Simply start on a given number of lines above "lnum". - */ -static void syn_sync(win_T *wp, linenr_T start_lnum, synstate_T *last_valid) -{ - buf_T *curbuf_save; - win_T *curwin_save; - pos_T cursor_save; - int idx; - linenr_T lnum; - linenr_T end_lnum; - linenr_T break_lnum; - int had_sync_point; - stateitem_T *cur_si; - synpat_T *spp; - char_u *line; - int found_flags = 0; - int found_match_idx = 0; - linenr_T found_current_lnum = 0; - int found_current_col= 0; - lpos_T found_m_endpos; - colnr_T prev_current_col; - - /* - * Clear any current state that might be hanging around. - */ - invalidate_current_state(); - - /* - * Start at least "minlines" back. Default starting point for parsing is - * there. - * Start further back, to avoid that scrolling backwards will result in - * resyncing for every line. Now it resyncs only one out of N lines, - * where N is minlines * 1.5, or minlines * 2 if minlines is small. - * Watch out for overflow when minlines is MAXLNUM. - */ - if (syn_block->b_syn_sync_minlines > start_lnum) - start_lnum = 1; - else { - if (syn_block->b_syn_sync_minlines == 1) - lnum = 1; - else if (syn_block->b_syn_sync_minlines < 10) - lnum = syn_block->b_syn_sync_minlines * 2; - else - lnum = syn_block->b_syn_sync_minlines * 3 / 2; - if (syn_block->b_syn_sync_maxlines != 0 - && lnum > syn_block->b_syn_sync_maxlines) - lnum = syn_block->b_syn_sync_maxlines; - if (lnum >= start_lnum) - start_lnum = 1; - else - start_lnum -= lnum; - } - current_lnum = start_lnum; - - /* - * 1. Search backwards for the end of a C-style comment. - */ - if (syn_block->b_syn_sync_flags & SF_CCOMMENT) { - /* Need to make syn_buf the current buffer for a moment, to be able to - * use find_start_comment(). */ - curwin_save = curwin; - curwin = wp; - curbuf_save = curbuf; - curbuf = syn_buf; - - /* - * Skip lines that end in a backslash. - */ - for (; start_lnum > 1; --start_lnum) { - line = ml_get(start_lnum - 1); - if (*line == NUL || *(line + STRLEN(line) - 1) != '\\') - break; - } - current_lnum = start_lnum; - - /* set cursor to start of search */ - cursor_save = wp->w_cursor; - wp->w_cursor.lnum = start_lnum; - wp->w_cursor.col = 0; - - /* - * If the line is inside a comment, need to find the syntax item that - * defines the comment. - * Restrict the search for the end of a comment to b_syn_sync_maxlines. - */ - if (find_start_comment((int)syn_block->b_syn_sync_maxlines) != NULL) { - for (idx = syn_block->b_syn_patterns.ga_len; --idx >= 0; ) - if (SYN_ITEMS(syn_block)[idx].sp_syn.id - == syn_block->b_syn_sync_id - && SYN_ITEMS(syn_block)[idx].sp_type == SPTYPE_START) { - validate_current_state(); - push_current_state(idx); - update_si_attr(current_state.ga_len - 1); - break; - } - } - - /* restore cursor and buffer */ - wp->w_cursor = cursor_save; - curwin = curwin_save; - curbuf = curbuf_save; - } - /* - * 2. Search backwards for given sync patterns. - */ - else if (syn_block->b_syn_sync_flags & SF_MATCH) { - if (syn_block->b_syn_sync_maxlines != 0 - && start_lnum > syn_block->b_syn_sync_maxlines) - break_lnum = start_lnum - syn_block->b_syn_sync_maxlines; - else - break_lnum = 0; - - found_m_endpos.lnum = 0; - found_m_endpos.col = 0; - end_lnum = start_lnum; - lnum = start_lnum; - while (--lnum > break_lnum) { - /* This can take a long time: break when CTRL-C pressed. */ - line_breakcheck(); - if (got_int) { - invalidate_current_state(); - current_lnum = start_lnum; - break; - } - - /* Check if we have run into a valid saved state stack now. */ - if (last_valid != NULL && lnum == last_valid->sst_lnum) { - load_current_state(last_valid); - break; - } - - /* - * Check if the previous line has the line-continuation pattern. - */ - if (lnum > 1 && syn_match_linecont(lnum - 1)) - continue; - - /* - * Start with nothing on the state stack - */ - validate_current_state(); - - for (current_lnum = lnum; current_lnum < end_lnum; ++current_lnum) { - syn_start_line(); - for (;; ) { - had_sync_point = syn_finish_line(TRUE); - /* - * When a sync point has been found, remember where, and - * continue to look for another one, further on in the line. - */ - if (had_sync_point && current_state.ga_len) { - cur_si = &CUR_STATE(current_state.ga_len - 1); - if (cur_si->si_m_endpos.lnum > start_lnum) { - /* ignore match that goes to after where started */ - current_lnum = end_lnum; - break; - } - if (cur_si->si_idx < 0) { - /* Cannot happen? */ - found_flags = 0; - found_match_idx = KEYWORD_IDX; - } else { - spp = &(SYN_ITEMS(syn_block)[cur_si->si_idx]); - found_flags = spp->sp_flags; - found_match_idx = spp->sp_sync_idx; - } - found_current_lnum = current_lnum; - found_current_col = current_col; - found_m_endpos = cur_si->si_m_endpos; - /* - * Continue after the match (be aware of a zero-length - * match). - */ - if (found_m_endpos.lnum > current_lnum) { - current_lnum = found_m_endpos.lnum; - current_col = found_m_endpos.col; - if (current_lnum >= end_lnum) - break; - } else if (found_m_endpos.col > current_col) - current_col = found_m_endpos.col; - else - ++current_col; - - /* syn_current_attr() will have skipped the check for - * an item that ends here, need to do that now. Be - * careful not to go past the NUL. */ - prev_current_col = current_col; - if (syn_getcurline()[current_col] != NUL) - ++current_col; - check_state_ends(); - current_col = prev_current_col; - } else - break; - } - } - - /* - * If a sync point was encountered, break here. - */ - if (found_flags) { - /* - * Put the item that was specified by the sync point on the - * state stack. If there was no item specified, make the - * state stack empty. - */ - clear_current_state(); - if (found_match_idx >= 0) { - push_current_state(found_match_idx); - update_si_attr(current_state.ga_len - 1); - } - - /* - * When using "grouphere", continue from the sync point - * match, until the end of the line. Parsing starts at - * the next line. - * For "groupthere" the parsing starts at start_lnum. - */ - if (found_flags & HL_SYNC_HERE) { - if (current_state.ga_len) { - cur_si = &CUR_STATE(current_state.ga_len - 1); - cur_si->si_h_startpos.lnum = found_current_lnum; - cur_si->si_h_startpos.col = found_current_col; - update_si_end(cur_si, (int)current_col, TRUE); - check_keepend(); - } - current_col = found_m_endpos.col; - current_lnum = found_m_endpos.lnum; - (void)syn_finish_line(FALSE); - ++current_lnum; - } else - current_lnum = start_lnum; - - break; - } - - end_lnum = lnum; - invalidate_current_state(); - } - - /* Ran into start of the file or exceeded maximum number of lines */ - if (lnum <= break_lnum) { - invalidate_current_state(); - current_lnum = break_lnum + 1; - } - } - - validate_current_state(); -} - -/* - * Return TRUE if the line-continuation pattern matches in line "lnum". - */ -static int syn_match_linecont(linenr_T lnum) -{ - regmmatch_T regmatch; - - if (syn_block->b_syn_linecont_prog != NULL) { - regmatch.rmm_ic = syn_block->b_syn_linecont_ic; - regmatch.regprog = syn_block->b_syn_linecont_prog; - return syn_regexec(®match, lnum, (colnr_T)0, - IF_SYN_TIME(&syn_block->b_syn_linecont_time)); - } - return FALSE; -} - -/* - * Prepare the current state for the start of a line. - */ -static void syn_start_line(void) -{ - current_finished = FALSE; - current_col = 0; - - /* - * Need to update the end of a start/skip/end that continues from the - * previous line and regions that have "keepend". - */ - if (current_state.ga_len > 0) { - syn_update_ends(TRUE); - check_state_ends(); - } - - next_match_idx = -1; - ++current_line_id; -} - -/* - * Check for items in the stack that need their end updated. - * When "startofline" is TRUE the last item is always updated. - * When "startofline" is FALSE the item with "keepend" is forcefully updated. - */ -static void syn_update_ends(int startofline) -{ - stateitem_T *cur_si; - int i; - int seen_keepend; - - if (startofline) { - /* Check for a match carried over from a previous line with a |