diff options
Diffstat (limited to 'src/nvim/regexp_nfa.c')
| -rw-r--r-- | src/nvim/regexp_nfa.c | 457 |
1 files changed, 229 insertions, 228 deletions
diff --git a/src/nvim/regexp_nfa.c b/src/nvim/regexp_nfa.c index e66f2681bf..27409352b5 100644 --- a/src/nvim/regexp_nfa.c +++ b/src/nvim/regexp_nfa.c @@ -3464,14 +3464,12 @@ static char *pim_info(nfa_pim_T *pim) #endif -/* Used during execution: whether a match has been found. */ +// Used during execution: whether a match has been found. static int nfa_match; static proftime_T *nfa_time_limit; static int nfa_time_count; -/* - * Copy postponed invisible match info from "from" to "to". - */ +// Copy postponed invisible match info from "from" to "to". static void copy_pim(nfa_pim_T *to, nfa_pim_T *from) { to->result = from->result; @@ -4567,7 +4565,7 @@ static int recursive_regmatch(nfa_state_T *state, nfa_pim_T *pim, nfa_regprog_T if (log_fd != NULL) { fprintf(log_fd, "****************************\n"); fprintf(log_fd, "FINISHED RUNNING nfa_regmatch() recursively\n"); - fprintf(log_fd, "MATCH = %s\n", result == TRUE ? "OK" : "FALSE"); + fprintf(log_fd, "MATCH = %s\n", !result ? "FALSE" : "OK"); fprintf(log_fd, "****************************\n"); } else { EMSG(_( @@ -4814,22 +4812,21 @@ static long find_match_text(colnr_T startcol, int regstart, char_u *match_text) #undef PTR2LEN } -/* - * Main matching routine. - * - * Run NFA to determine whether it matches reginput. - * - * When "nfa_endp" is not NULL it is a required end-of-match position. - * - * Return TRUE if there is a match, FALSE otherwise. - * When there is a match "submatch" contains the positions. - * Note: Caller must ensure that: start != NULL. - */ -static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *submatch, regsubs_T *m) +/// Main matching routine. +/// +/// Run NFA to determine whether it matches reginput. +/// +/// When "nfa_endp" is not NULL it is a required end-of-match position. +/// +/// Return TRUE if there is a match, FALSE otherwise. +/// When there is a match "submatch" contains the positions. +/// Note: Caller must ensure that: start != NULL. +static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, + regsubs_T *submatch, regsubs_T *m) { int result; int flag = 0; - int go_to_nextline = FALSE; + bool go_to_nextline = false; nfa_thread_T *t; nfa_list_T list[2]; int listidx; @@ -4846,21 +4843,22 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm if (debug == NULL) { EMSG2(_("(NFA) COULD NOT OPEN %s !"), NFA_REGEXP_DEBUG_LOG); - return FALSE; + return false; } #endif - /* Some patterns may take a long time to match, especially when using - * recursive_regmatch(). Allow interrupting them with CTRL-C. */ + // Some patterns may take a long time to match, especially when using + // recursive_regmatch(). Allow interrupting them with CTRL-C. fast_breakcheck(); - if (got_int) - return FALSE; + if (got_int) { + return false; + } if (nfa_time_limit != NULL && profile_passed_limit(*nfa_time_limit)) { - return FALSE; + return false; } - nfa_match = FALSE; + nfa_match = false; - /* Allocate memory for the lists of nodes. */ + // Allocate memory for the lists of nodes. size_t size = (nstate + 1) * sizeof(nfa_thread_T); list[0].t = xmalloc(size); list[0].len = nstate + 1; @@ -4928,7 +4926,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm } if (curc == NUL) { clen = 0; - go_to_nextline = FALSE; + go_to_nextline = false; } /* swap lists */ @@ -5011,7 +5009,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm if (enc_utf8 && !ireg_icombine && utf_iscomposing(curc)) { break; } - nfa_match = TRUE; + nfa_match = true; copy_sub(&submatch->norm, &t->subs.norm); if (nfa_has_zsubexpr) copy_sub(&submatch->synt, &t->subs.synt); @@ -5076,10 +5074,11 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm fprintf(log_fd, "Match found:\n"); log_subsexpr(m); #endif - nfa_match = TRUE; - /* See comment above at "goto nextchar". */ - if (nextlist->n == 0) + nfa_match = true; + // See comment above at "goto nextchar". + if (nextlist->n == 0) { clen = 0; + } goto nextchar; case NFA_START_INVISIBLE: @@ -5096,8 +5095,8 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm failure_chance(t->state->out, 0), failure_chance(t->state->out1->out, 0)); #endif - /* Do it directly if there already is a PIM or when - * nfa_postprocess() detected it will work better. */ + // Do it directly if there already is a PIM or when + // nfa_postprocess() detected it will work better. if (t->pim.result != NFA_PIM_UNUSED || t->state->c == NFA_START_INVISIBLE_FIRST || t->state->c == NFA_START_INVISIBLE_NEG_FIRST @@ -5105,42 +5104,40 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm || t->state->c == NFA_START_INVISIBLE_BEFORE_NEG_FIRST) { int in_use = m->norm.in_use; - /* Copy submatch info for the recursive call, opposite - * of what happens on success below. */ + // Copy submatch info for the recursive call, opposite + // of what happens on success below. copy_sub_off(&m->norm, &t->subs.norm); if (nfa_has_zsubexpr) copy_sub_off(&m->synt, &t->subs.synt); - /* - * First try matching the invisible match, then what - * follows. - */ - result = recursive_regmatch(t->state, NULL, prog, - submatch, m, &listids); + // First try matching the invisible match, then what + // follows. + result = recursive_regmatch(t->state, NULL, prog, submatch, m, + &listids); if (result == NFA_TOO_EXPENSIVE) { nfa_match = result; goto theend; } - /* for \@! and \@<! it is a match when the result is - * FALSE */ + // for \@! and \@<! it is a match when the result is + // FALSE if (result != (t->state->c == NFA_START_INVISIBLE_NEG || t->state->c == NFA_START_INVISIBLE_NEG_FIRST || t->state->c == NFA_START_INVISIBLE_BEFORE_NEG || t->state->c == NFA_START_INVISIBLE_BEFORE_NEG_FIRST)) { - /* Copy submatch info from the recursive call */ + // Copy submatch info from the recursive call copy_sub_off(&t->subs.norm, &m->norm); if (nfa_has_zsubexpr) copy_sub_off(&t->subs.synt, &m->synt); - /* If the pattern has \ze and it matched in the - * sub pattern, use it. */ + // If the pattern has \ze and it matched in the + // sub pattern, use it. copy_ze_off(&t->subs.norm, &m->norm); - /* t->state->out1 is the corresponding - * END_INVISIBLE node; Add its out to the current - * list (zero-width match). */ + // t->state->out1 is the corresponding + // END_INVISIBLE node; Add its out to the current + // list (zero-width match). add_here = true; add_state = t->state->out1->out; } @@ -5148,12 +5145,10 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm } else { nfa_pim_T pim; - /* - * First try matching what follows. Only if a match - * is found verify the invisible match matches. Add a - * nfa_pim_T to the following states, it contains info - * about the invisible match. - */ + // First try matching what follows. Only if a match + // is found verify the invisible match matches. Add a + // nfa_pim_T to the following states, it contains info + // about the invisible match. pim.state = t->state; pim.result = NFA_PIM_TODO; pim.subs.norm.in_use = 0; @@ -5164,9 +5159,9 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm } else pim.end.ptr = reginput; - /* t->state->out1 is the corresponding END_INVISIBLE - * node; Add its out to the current list (zero-width - * match). */ + // t->state->out1 is the corresponding END_INVISIBLE + // node; Add its out to the current list (zero-width + // match). addstate_here(thislist, t->state->out1->out, &t->subs, &pim, &listidx); } @@ -5180,8 +5175,8 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm int skip_lid = 0; #endif - /* There is no point in trying to match the pattern if the - * output state is not going to be added to the list. */ + // There is no point in trying to match the pattern if the + // output state is not going to be added to the list. if (state_in_list(nextlist, t->state->out1->out, &t->subs)) { skip = t->state->out1->out; #ifdef REGEXP_DEBUG @@ -5210,15 +5205,16 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm #endif break; } - /* Copy submatch info to the recursive call, opposite of what - * happens afterwards. */ + // Copy submatch info to the recursive call, opposite of what + // happens afterwards. copy_sub_off(&m->norm, &t->subs.norm); - if (nfa_has_zsubexpr) + if (nfa_has_zsubexpr) { copy_sub_off(&m->synt, &t->subs.synt); + } - /* First try matching the pattern. */ - result = recursive_regmatch(t->state, NULL, prog, - submatch, m, &listids); + // First try matching the pattern. + result = recursive_regmatch(t->state, NULL, prog, submatch, m, + &listids); if (result == NFA_TOO_EXPENSIVE) { nfa_match = result; goto theend; @@ -5230,36 +5226,38 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm fprintf(log_fd, "NFA_START_PATTERN matches:\n"); log_subsexpr(m); #endif - /* Copy submatch info from the recursive call */ + // Copy submatch info from the recursive call copy_sub_off(&t->subs.norm, &m->norm); - if (nfa_has_zsubexpr) + if (nfa_has_zsubexpr) { copy_sub_off(&t->subs.synt, &m->synt); - /* Now we need to skip over the matched text and then - * continue with what follows. */ - if (REG_MULTI) - /* TODO: multi-line match */ + } + // Now we need to skip over the matched text and then + // continue with what follows. + if (REG_MULTI) { + // TODO(RE): multi-line match bytelen = m->norm.list.multi[0].end_col - (int)(reginput - regline); - else + } else { bytelen = (int)(m->norm.list.line[0].end - reginput); + } #ifdef REGEXP_DEBUG fprintf(log_fd, "NFA_START_PATTERN length: %d\n", bytelen); #endif if (bytelen == 0) { - /* empty match, output of corresponding - * NFA_END_PATTERN/NFA_SKIP to be used at current - * position */ + // empty match, output of corresponding + // NFA_END_PATTERN/NFA_SKIP to be used at current + // position add_here = true; add_state = t->state->out1->out->out; } else if (bytelen <= clen) { - /* match current character, output of corresponding - * NFA_END_PATTERN to be used at next position. */ + // match current character, output of corresponding + // NFA_END_PATTERN to be used at next position. add_state = t->state->out1->out->out; add_off = clen; } else { - /* skip over the matched characters, set character - * count in NFA_SKIP */ + // skip over the matched characters, set character + // count in NFA_SKIP add_state = t->state->out1->out; add_off = bytelen; add_count = bytelen - clen; @@ -5283,23 +5281,25 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm break; case NFA_BOW: - result = TRUE; + result = true; - if (curc == NUL) - result = FALSE; - else if (has_mbyte) { + if (curc == NUL) { + result = false; + } else if (has_mbyte) { int this_class; - /* Get class of current and previous char (if it exists). */ + // Get class of current and previous char (if it exists). this_class = mb_get_class_buf(reginput, reg_buf); - if (this_class <= 1) - result = FALSE; - else if (reg_prev_class() == this_class) - result = FALSE; + if (this_class <= 1) { + result = false; + } else if (reg_prev_class() == this_class) { + result = false; + } } else if (!vim_iswordc_buf(curc, reg_buf) || (reginput > regline - && vim_iswordc_buf(reginput[-1], reg_buf))) - result = FALSE; + && vim_iswordc_buf(reginput[-1], reg_buf))) { + result = false; + } if (result) { add_here = true; add_state = t->state->out; @@ -5307,22 +5307,24 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm break; case NFA_EOW: - result = TRUE; - if (reginput == regline) - result = FALSE; - else if (has_mbyte) { + result = true; + if (reginput == regline) { + result = false; + } else if (has_mbyte) { int this_class, prev_class; - /* Get class of current and previous char (if it exists). */ + // Get class of current and previous char (if it exists). this_class = mb_get_class_buf(reginput, reg_buf); prev_class = reg_prev_class(); if (this_class == prev_class - || prev_class == 0 || prev_class == 1) - result = FALSE; + || prev_class == 0 || prev_class == 1) { + result = false; + } } else if (!vim_iswordc_buf(reginput[-1], reg_buf) || (reginput[0] != NUL - && vim_iswordc_buf(curc, reg_buf))) - result = FALSE; + && vim_iswordc_buf(curc, reg_buf))) { + result = false; + } if (result) { add_here = true; add_state = t->state->out; @@ -5357,30 +5359,31 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm sta = t->state->out; len = 0; if (utf_iscomposing(sta->c)) { - /* Only match composing character(s), ignore base - * character. Used for ".{composing}" and "{composing}" - * (no preceding character). */ + // Only match composing character(s), ignore base + // character. Used for ".{composing}" and "{composing}" + // (no preceding character). len += mb_char2len(mc); } if (ireg_icombine && len == 0) { - /* If \Z was present, then ignore composing characters. - * When ignoring the base character this always matches. */ - if (sta->c != curc) + // If \Z was present, then ignore composing characters. + // When ignoring the base character this always matches. + if (sta->c != curc) { result = FAIL; - else + } else { result = OK; - while (sta->c != NFA_END_COMPOSING) + } + while (sta->c != NFA_END_COMPOSING) { sta = sta->out; - } - /* Check base character matches first, unless ignored. */ - else if (len > 0 || mc == sta->c) { + } + } else if (len > 0 || mc == sta->c) { + // Check base character matches first, unless ignored. if (len == 0) { len += mb_char2len(mc); sta = sta->out; } - /* We don't care about the order of composing characters. - * Get them into cchars[] first. */ + // We don't care about the order of composing characters. + // Get them into cchars[] first. while (len < clen) { mc = mb_ptr2char(reginput + len); cchars[ccount++] = mc; @@ -5389,9 +5392,9 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm break; } - /* Check that each composing char in the pattern matches a - * composing char in the text. We do not check if all - * composing chars are matched. */ + // Check that each composing char in the pattern matches a + // composing char in the text. We do not check if all + // composing chars are matched. result = OK; while (sta->c != NFA_END_COMPOSING) { for (j = 0; j < ccount; ++j) @@ -5406,7 +5409,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm } else result = FAIL; - end = t->state->out1; /* NFA_END_COMPOSING */ + end = t->state->out1; // NFA_END_COMPOSING ADD_STATE_IF_MATCH(end); break; } @@ -5414,13 +5417,13 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm case NFA_NEWL: if (curc == NUL && !reg_line_lbr && REG_MULTI && reglnum <= reg_maxline) { - go_to_nextline = TRUE; - /* Pass -1 for the offset, which means taking the position - * at the start of the next line. */ + go_to_nextline = true; + // Pass -1 for the offset, which means taking the position + // at the start of the next line. add_state = t->state->out; add_off = -1; } else if (curc == '\n' && reg_line_lbr) { - /* match \n as if it is an ordinary character */ + // match \n as if it is an ordinary character add_state = t->state->out; add_off = 1; } @@ -5429,16 +5432,17 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm case NFA_START_COLL: case NFA_START_NEG_COLL: { - /* What follows is a list of characters, until NFA_END_COLL. - * One of them must match or none of them must match. */ + // What follows is a list of characters, until NFA_END_COLL. + // One of them must match or none of them must match. nfa_state_T *state; int result_if_matched; int c1, c2; - /* Never match EOL. If it's part of the collection it is added - * as a separate state with an OR. */ - if (curc == NUL) + // Never match EOL. If it's part of the collection it is added + // as a separate state with an OR. + if (curc == NUL) { break; + } state = t->state->out; result_if_matched = (t->state->c == NFA_START_COLL); @@ -5449,7 +5453,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm } if (state->c == NFA_RANGE_MIN) { c1 = state->val; - state = state->out; /* advance to NFA_RANGE_MAX */ + state = state->out; // advance to NFA_RANGE_MAX c2 = state->val; #ifdef REGEXP_DEBUG fprintf(log_fd, "NFA_RANGE_MIN curc=%d c1=%d c2=%d\n", @@ -5482,8 +5486,8 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm state = state->out; } if (result) { - /* next state is in out of the NFA_END_COLL, out1 of - * START points to the END state */ + // next state is in out of the NFA_END_COLL, out1 of + // START points to the END state add_state = t->state->out1->out; add_off = clen; } @@ -5491,7 +5495,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm } case NFA_ANY: - /* Any char except '\0', (end of input) does not match. */ + // Any char except '\0', (end of input) does not match. if (curc > 0) { add_state = t->state->out; add_off = clen; @@ -5510,157 +5514,155 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm add_state = t->state->out; break; - /* - * Character classes like \a for alpha, \d for digit etc. - */ - case NFA_IDENT: /* \i */ + // Character classes like \a for alpha, \d for digit etc. + case NFA_IDENT: // \i result = vim_isIDc(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_SIDENT: /* \I */ + case NFA_SIDENT: // \I result = !ascii_isdigit(curc) && vim_isIDc(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_KWORD: /* \k */ + case NFA_KWORD: // \k result = vim_iswordp_buf(reginput, reg_buf); ADD_STATE_IF_MATCH(t->state); break; - case NFA_SKWORD: /* \K */ + case NFA_SKWORD: // \K result = !ascii_isdigit(curc) && vim_iswordp_buf(reginput, reg_buf); ADD_STATE_IF_MATCH(t->state); break; - case NFA_FNAME: /* \f */ + case NFA_FNAME: // \f result = vim_isfilec(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_SFNAME: /* \F */ + case NFA_SFNAME: // \F result = !ascii_isdigit(curc) && vim_isfilec(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_PRINT: /* \p */ + case NFA_PRINT: // \p result = vim_isprintc(PTR2CHAR(reginput)); ADD_STATE_IF_MATCH(t->state); break; - case NFA_SPRINT: /* \P */ + case NFA_SPRINT: // \P result = !ascii_isdigit(curc) && vim_isprintc(PTR2CHAR(reginput)); ADD_STATE_IF_MATCH(t->state); break; - case NFA_WHITE: /* \s */ + case NFA_WHITE: // \s result = ascii_iswhite(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NWHITE: /* \S */ + case NFA_NWHITE: // \S result = curc != NUL && !ascii_iswhite(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_DIGIT: /* \d */ + case NFA_DIGIT: // \d result = ri_digit(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NDIGIT: /* \D */ + case NFA_NDIGIT: // \D result = curc != NUL && !ri_digit(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_HEX: /* \x */ + case NFA_HEX: // \x result = ri_hex(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NHEX: /* \X */ + case NFA_NHEX: // \X result = curc != NUL && !ri_hex(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_OCTAL: /* \o */ + case NFA_OCTAL: // \o result = ri_octal(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NOCTAL: /* \O */ + case NFA_NOCTAL: // \O result = curc != NUL && !ri_octal(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_WORD: /* \w */ + case NFA_WORD: // \w result = ri_word(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NWORD: /* \W */ + case NFA_NWORD: // \W result = curc != NUL && !ri_word(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_HEAD: /* \h */ + case NFA_HEAD: // \h result = ri_head(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NHEAD: /* \H */ + case NFA_NHEAD: // \H result = curc != NUL && !ri_head(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_ALPHA: /* \a */ + case NFA_ALPHA: // \a result = ri_alpha(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NALPHA: /* \A */ + case NFA_NALPHA: // \A result = curc != NUL && !ri_alpha(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_LOWER: /* \l */ + case NFA_LOWER: // \l result = ri_lower(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NLOWER: /* \L */ + case NFA_NLOWER: // \L result = curc != NUL && !ri_lower(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_UPPER: /* \u */ + case NFA_UPPER: // \u result = ri_upper(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NUPPER: /* \U */ + case NFA_NUPPER: // \U result = curc != NUL && !ri_upper(curc); ADD_STATE_IF_MATCH(t->state); break; - case NFA_LOWER_IC: /* [a-z] */ + case NFA_LOWER_IC: // [a-z] result = ri_lower(curc) || (ireg_ic && ri_upper(curc)); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NLOWER_IC: /* [^a-z] */ + case NFA_NLOWER_IC: // [^a-z] result = curc != NUL && !(ri_lower(curc) || (ireg_ic && ri_upper(curc))); ADD_STATE_IF_MATCH(t->state); break; - case NFA_UPPER_IC: /* [A-Z] */ + case NFA_UPPER_IC: // [A-Z] result = ri_upper(curc) || (ireg_ic && ri_lower(curc)); ADD_STATE_IF_MATCH(t->state); break; - case NFA_NUPPER_IC: /* ^[A-Z] */ + case NFA_NUPPER_IC: // [^A-Z] result = curc != NUL && !(ri_upper(curc) || (ireg_ic && ri_lower(curc))); ADD_STATE_IF_MATCH(t->state); @@ -5684,7 +5686,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm case NFA_ZREF7: case NFA_ZREF8: case NFA_ZREF9: - /* \1 .. \9 \z1 .. \z9 */ + // \1 .. \9 \z1 .. \z9 { int subidx; int bytelen; @@ -5699,18 +5701,18 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm if (result) { if (bytelen == 0) { - /* empty match always works, output of NFA_SKIP to be - * used next */ + // empty match always works, output of NFA_SKIP to be + // used next add_here = true; add_state = t->state->out->out; } else if (bytelen <= clen) { - /* match current character, jump ahead to out of - * NFA_SKIP */ + // match current character, jump ahead to out of + // NFA_SKIP add_state = t->state->out->out; add_off = clen; } else { - /* skip over the matched characters, set character - * count in NFA_SKIP */ + // skip over the matched characters, set character + // count in NFA_SKIP add_state = t->state->out; add_off = bytelen; add_count = bytelen - clen; @@ -5719,13 +5721,13 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm break; } case NFA_SKIP: - /* character of previous matching \1 .. \9 or \@> */ + // character of previous matching \1 .. \9 or \@> if (t->count - clen <= 0) { - /* end of match, go to what follows */ + // end of match, go to what follows add_state = t->state->out; add_off = clen; } else { - /* add state again with decremented count */ + // add state again with decremented count add_state = t->state; add_off = 0; add_count = t->count - clen; @@ -5777,7 +5779,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm break; } - result = FALSE; + result = false; win_T *wp = reg_win == NULL ? curwin : reg_win; if (op == 1 && col - 1 > t->state->val && col > 100) { long ts = wp->w_buffer->b_p_ts; @@ -5807,9 +5809,9 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm { pos_T *pos = getmark_buf(reg_buf, t->state->val, FALSE); - /* Compare the mark position to the match position. */ - result = (pos != NULL /* mark doesn't exist */ - && pos->lnum > 0 /* mark isn't set in reg_buf */ + // Compare the mark position to the match position. + result = (pos != NULL // mark doesn't exist + && pos->lnum > 0 // mark isn't set in reg_buf && (pos->lnum == reglnum + reg_firstlnum ? (pos->col == (colnr_T)(reginput - regline) ? t->state->c == NFA_MARK @@ -5866,11 +5868,11 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm case NFA_ZOPEN9: case NFA_NOPEN: case NFA_ZSTART: - /* These states are only added to be able to bail out when - * they are added again, nothing is to be done. */ + // These states are only added to be able to bail out when + // they are added again, nothing is to be done. break; - default: /* regular character */ + default: // regular character { int c = t->state->c; @@ -5892,8 +5894,7 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm ADD_STATE_IF_MATCH(t->state); break; } - - } /* switch (t->state->c) */ + } // switch (t->state->c) if (add_state != NULL) { nfa_pim_T *pim; @@ -5904,8 +5905,8 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm else pim = &t->pim; - /* Handle the postponed invisible match if the match might end - * without advancing and before the end of the line. */ + // Handle the postponed invisible match if the match might end + // without advancing and before the end of the line. if (pim != NULL && (clen == 0 || match_follows(add_state, 0))) { if (pim->result == NFA_PIM_TODO) { #ifdef REGEXP_DEBUG @@ -5917,15 +5918,15 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm result = recursive_regmatch(pim->state, pim, prog, submatch, m, &listids); pim->result = result ? NFA_PIM_MATCH : NFA_PIM_NOMATCH; - /* for \@! and \@<! it is a match when the result is - * FALSE */ + // for \@! and \@<! it is a match when the result is + // FALSE if (result != (pim->state->c == NFA_START_INVISIBLE_NEG || pim->state->c == NFA_START_INVISIBLE_NEG_FIRST || pim->state->c == NFA_START_INVISIBLE_BEFORE_NEG || pim->state->c == NFA_START_INVISIBLE_BEFORE_NEG_FIRST)) { - /* Copy submatch info from the recursive call */ + // Copy submatch info from the recursive call copy_sub_off(&pim->subs.norm, &m->norm); if (nfa_has_zsubexpr) copy_sub_off(&pim->subs.synt, &m->synt); @@ -5938,34 +5939,35 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm log_fd, "Using previous recursive nfa_regmatch() result, result == %d\n", pim->result); - fprintf(log_fd, "MATCH = %s\n", result == TRUE ? "OK" : "FALSE"); + fprintf(log_fd, "MATCH = %s\n", result ? "OK" : "FALSE"); fprintf(log_fd, "\n"); #endif } - /* for \@! and \@<! it is a match when result is FALSE */ + // for \@! and \@<! it is a match when result is FALSE if (result != (pim->state->c == NFA_START_INVISIBLE_NEG || pim->state->c == NFA_START_INVISIBLE_NEG_FIRST || pim->state->c == NFA_START_INVISIBLE_BEFORE_NEG || pim->state->c == NFA_START_INVISIBLE_BEFORE_NEG_FIRST)) { - /* Copy submatch info from the recursive call */ + // Copy submatch info from the recursive call copy_sub_off(&t->subs.norm, &pim->subs.norm); if (nfa_has_zsubexpr) copy_sub_off(&t->subs.synt, &pim->subs.synt); - } else - /* look-behind match failed, don't add the state */ + } else { + // look-behind match failed, don't add the state continue; + } - /* Postponed invisible match was handled, don't add it to - * following states. */ + // Postponed invisible match was handled, don't add it to + // following states. pim = NULL; } - /* If "pim" points into l->t it will become invalid when - * adding the state causes the list to be reallocated. Make a - * local copy to avoid that. */ + // If "pim" points into l->t it will become invalid when + // adding the state causes the list to be reallocated. Make a + // local copy to avoid that. if (pim == &t->pim) { copy_pim(&pim_copy, pim); pim = &pim_copy; @@ -5979,18 +5981,17 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm nextlist->t[nextlist->n - 1].count = add_count; } } - - } /* for (thislist = thislist; thislist->state; thislist++) */ - - /* Look for the start of a match in the current position by adding the - * start state to the list of states. - * The first found match is the leftmost one, thus the order of states - * matters! - * Do not add the start state in recursive calls of nfa_regmatch(), - * because recursive calls should only start in the first position. - * Unless "nfa_endp" is not NULL, then we match the end position. - * Also don't start a match past the first line. */ - if (nfa_match == FALSE + } // for (thislist = thislist; thislist->state; thislist++) + + // Look for the start of a match in the current position by adding the + // start state to the list of states. + // The first found match is the leftmost one, thus the order of states + // matters! + // Do not add the start state in recursive calls of nfa_regmatch(), + // because recursive calls should only start in the first position. + // Unless "nfa_endp" is not NULL, then we match the end position. + // Also don't start a match past the first line. + if (!nfa_match && ((toplevel && reglnum == 0 && clen != 0 @@ -6006,8 +6007,8 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm #ifdef REGEXP_DEBUG fprintf(log_fd, "(---) STARTSTATE\n"); #endif - /* Inline optimized code for addstate() if we know the state is - * the first MOPEN. */ + // Inline optimized code for addstate() if we know the state is + // the first MOPEN. if (toplevel) { int add = TRUE; int c; @@ -6016,18 +6017,19 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm if (nextlist->n == 0) { colnr_T col = (colnr_T)(reginput - regline) + clen; - /* Nextlist is empty, we can skip ahead to the - * character that must appear at the start. */ - if (skip_to_start(prog->regstart, &col) == FAIL) + // Nextlist is empty, we can skip ahead to the + // character that must appear at the start. + if (skip_to_start(prog->regstart, &col) == FAIL) { break; + } #ifdef REGEXP_DEBUG fprintf(log_fd, " Skipping ahead %d bytes to regstart\n", col - ((colnr_T)(reginput - regline) + clen)); #endif reginput = regline + col - clen; } else { - /* Checking if the required start character matches is - * cheaper than adding a state that won't match. */ + // Checking if the required start character matches is + // cheaper than adding a state that won't match. c = PTR2CHAR(reginput + clen); if (c != prog->regstart && (!ireg_ic || vim_tolower(c) != vim_tolower(prog->regstart))) { @@ -6064,15 +6066,16 @@ static int nfa_regmatch(nfa_regprog_T *prog, nfa_state_T *start, regsubs_T *subm #endif nextchar: - /* Advance to the next character, or advance to the next line, or - * finish. */ - if (clen != 0) + // Advance to the next character, or advance to the next line, or + // finish. + if (clen != 0) { reginput += clen; - else if (go_to_nextline || (nfa_endp != NULL && REG_MULTI - && reglnum < nfa_endp->se_u.pos.lnum)) + } else if (go_to_nextline || (nfa_endp != NULL && REG_MULTI + && reglnum < nfa_endp->se_u.pos.lnum)) { reg_nextline(); - else + } else { break; + } // Allow interrupting with CTRL-C. line_breakcheck(); @@ -6095,7 +6098,7 @@ nextchar: #endif theend: - /* Free memory */ + // Free memory xfree(list[0].t); xfree(list[1].t); xfree(listids); @@ -6107,10 +6110,8 @@ theend: return nfa_match; } -/* - * Try match of "prog" with at regline["col"]. - * Returns <= 0 for failure, number of lines contained in the match otherwise. - */ +// Try match of "prog" with at regline["col"]. +// Returns <= 0 for failure, number of lines contained in the match otherwise. static long nfa_regtry(nfa_regprog_T *prog, colnr_T col, proftime_T *tm) { int i; @@ -6147,7 +6148,7 @@ static long nfa_regtry(nfa_regprog_T *prog, colnr_T col, proftime_T *tm) clear_sub(&m.synt); int result = nfa_regmatch(prog, start, &subs, &m); - if (result == FALSE) { + if (!result) { return 0; } else if (result == NFA_TOO_EXPENSIVE) { return result; |