diff options
Diffstat (limited to 'grep.c')
| -rw-r--r-- | grep.c | 190 |
1 files changed, 129 insertions, 61 deletions
@@ -137,16 +137,50 @@ static void free_pcre_regexp(struct grep_pat *p) } #endif /* !USE_LIBPCRE */ +static int is_fixed(const char *s, size_t len) +{ + size_t i; + + /* regcomp cannot accept patterns with NULs so we + * consider any pattern containing a NUL fixed. + */ + if (memchr(s, 0, len)) + return 1; + + for (i = 0; i < len; i++) { + if (is_regex_special(s[i])) + return 0; + } + + return 1; +} + static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) { int err; p->word_regexp = opt->word_regexp; p->ignore_case = opt->ignore_case; - p->fixed = opt->fixed; - if (p->fixed) + if (opt->fixed || is_fixed(p->pattern, p->patternlen)) + p->fixed = 1; + else + p->fixed = 0; + + if (p->fixed) { + if (opt->regflags & REG_ICASE || p->ignore_case) { + static char trans[256]; + int i; + for (i = 0; i < 256; i++) + trans[i] = tolower(i); + p->kws = kwsalloc(trans); + } else { + p->kws = kwsalloc(NULL); + } + kwsincr(p->kws, p->pattern, p->patternlen); + kwsprep(p->kws); return; + } if (opt->pcre) { compile_pcre_regexp(p, opt); @@ -395,7 +429,9 @@ void free_grep_patterns(struct grep_opt *opt) case GREP_PATTERN: /* atom */ case GREP_PATTERN_HEAD: case GREP_PATTERN_BODY: - if (p->pcre_regexp) + if (p->kws) + kwsfree(p->kws); + else if (p->pcre_regexp) free_pcre_regexp(p); else regfree(&p->regexp); @@ -430,7 +466,7 @@ static int word_char(char ch) static void output_color(struct grep_opt *opt, const void *data, size_t size, const char *color) { - if (opt->color && color && color[0]) { + if (want_color(opt->color) && color && color[0]) { opt->output(opt, color, strlen(color)); opt->output(opt, data, size); opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET)); @@ -455,26 +491,14 @@ static void show_name(struct grep_opt *opt, const char *name) static int fixmatch(struct grep_pat *p, char *line, char *eol, regmatch_t *match) { - char *hit; - - if (p->ignore_case) { - char *s = line; - do { - hit = strcasestr(s, p->pattern); - if (hit) - break; - s += strlen(s) + 1; - } while (s < eol); - } else - hit = memmem(line, eol - line, p->pattern, p->patternlen); - - if (!hit) { + struct kwsmatch kwsm; + size_t offset = kwsexec(p->kws, line, eol - line, &kwsm); + if (offset == -1) { match->rm_so = match->rm_eo = -1; return REG_NOMATCH; - } - else { - match->rm_so = hit - line; - match->rm_eo = match->rm_so + p->patternlen; + } else { + match->rm_so = offset; + match->rm_eo = match->rm_so + kwsm.size[0]; return 0; } } @@ -721,7 +745,10 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol, int rest = eol - bol; char *line_color = NULL; - if (opt->pre_context || opt->post_context) { + if (opt->file_break && opt->last_shown == 0) { + if (opt->show_hunk_mark) + opt->output(opt, "\n", 1); + } else if (opt->pre_context || opt->post_context || opt->funcbody) { if (opt->last_shown == 0) { if (opt->show_hunk_mark) { output_color(opt, "--", 2, opt->color_sep); @@ -732,9 +759,13 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol, opt->output(opt, "\n", 1); } } + if (opt->heading && opt->last_shown == 0) { + output_color(opt, name, strlen(name), opt->color_filename); + opt->output(opt, "\n", 1); + } opt->last_shown = lno; - if (opt->pathname) { + if (!opt->heading && opt->pathname) { output_color(opt, name, strlen(name), opt->color_filename); output_sep(opt, sign); } @@ -775,10 +806,46 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol, opt->output(opt, "\n", 1); } -static int match_funcname(struct grep_opt *opt, char *bol, char *eol) +#ifndef NO_PTHREADS +/* + * This lock protects access to the gitattributes machinery, which is + * not thread-safe. + */ +pthread_mutex_t grep_attr_mutex; + +static inline void grep_attr_lock(struct grep_opt *opt) +{ + if (opt->use_threads) + pthread_mutex_lock(&grep_attr_mutex); +} + +static inline void grep_attr_unlock(struct grep_opt *opt) +{ + if (opt->use_threads) + pthread_mutex_unlock(&grep_attr_mutex); +} +#else +#define grep_attr_lock(opt) +#define grep_attr_unlock(opt) +#endif + +static int match_funcname(struct grep_opt *opt, const char *name, char *bol, char *eol) { xdemitconf_t *xecfg = opt->priv; - if (xecfg && xecfg->find_func) { + if (xecfg && !xecfg->find_func) { + struct userdiff_driver *drv; + grep_attr_lock(opt); + drv = userdiff_find_by_path(name); + grep_attr_unlock(opt); + if (drv && drv->funcname.pattern) { + const struct userdiff_funcname *pe = &drv->funcname; + xdiff_set_find_func(xecfg, pe->pattern, pe->cflags); + } else { + xecfg = opt->priv = NULL; + } + } + + if (xecfg) { char buf[1]; return xecfg->find_func(bol, eol - bol, buf, 1, xecfg->find_func_priv) >= 0; @@ -804,7 +871,7 @@ static void show_funcname_line(struct grep_opt *opt, const char *name, if (lno <= opt->last_shown) break; - if (match_funcname(opt, bol, eol)) { + if (match_funcname(opt, name, bol, eol)) { show_line(opt, bol, eol, name, lno, '='); break; } @@ -812,10 +879,13 @@ static void show_funcname_line(struct grep_opt *opt, const char *name, } static void show_pre_context(struct grep_opt *opt, const char *name, char *buf, - char *bol, unsigned lno) + char *bol, char *end, unsigned lno) { unsigned cur = lno, from = 1, funcname_lno = 0; - int funcname_needed = opt->funcname; + int funcname_needed = !!opt->funcname; + + if (opt->funcbody && !match_funcname(opt, name, bol, end)) + funcname_needed = 2; if (opt->pre_context < lno) from = lno - opt->pre_context; @@ -823,13 +893,14 @@ static void show_pre_context(struct grep_opt *opt, const char *name, char *buf, from = opt->last_shown + 1; /* Rewind. */ - while (bol > buf && cur > from) { + while (bol > buf && + cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { char *eol = --bol; while (bol > buf && bol[-1] != '\n') bol--; cur--; - if (funcname_needed && match_funcname(opt, bol, eol)) { + if (funcname_needed && match_funcname(opt, name, bol, eol)) { funcname_lno = cur; funcname_needed = 0; } @@ -907,19 +978,6 @@ static int look_ahead(struct grep_opt *opt, return 0; } -int grep_threads_ok(const struct grep_opt *opt) -{ - /* If this condition is true, then we may use the attribute - * machinery in grep_buffer_1. The attribute code is not - * thread safe, so we disable the use of threads. - */ - if (opt->funcname && !opt->unmatch_name_only && !opt->status_only && - !opt->name_only) - return 0; - - return 1; -} - static void std_output(struct grep_opt *opt, const void *buf, size_t size) { fwrite(buf, size, 1, stdout); @@ -935,15 +993,26 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, int binary_match_only = 0; unsigned count = 0; int try_lookahead = 0; + int show_function = 0; enum grep_context ctx = GREP_CONTEXT_HEAD; xdemitconf_t xecfg; if (!opt->output) opt->output = std_output; - if (opt->last_shown && (opt->pre_context || opt->post_context) && - opt->output == std_output) - opt->show_hunk_mark = 1; + if (opt->pre_context || opt->post_context || opt->file_break || + opt->funcbody) { + /* Show hunk marks, except for the first file. */ + if (opt->last_shown) + opt->show_hunk_mark = 1; + /* + * If we're using threads then we can't easily identify + * the first file. Always put hunk marks in that case + * and skip the very first one later in work_done(). + */ + if (opt->output != std_output) + opt->show_hunk_mark = 1; + } opt->last_shown = 0; switch (opt->binary) { @@ -962,15 +1031,8 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, } memset(&xecfg, 0, sizeof(xecfg)); - if (opt->funcname && !opt->unmatch_name_only && !opt->status_only && - !opt->name_only && !binary_match_only && !collect_hits) { - struct userdiff_driver *drv = userdiff_find_by_path(name); - if (drv && drv->funcname.pattern) { - const struct userdiff_funcname *pe = &drv->funcname; - xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); - opt->priv = &xecfg; - } - } + opt->priv = &xecfg; + try_lookahead = should_lookahead(opt); while (left) { @@ -988,7 +1050,8 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, */ if (try_lookahead && !(last_hit - && lno <= last_hit + opt->post_context) + && (show_function || + lno <= last_hit + opt->post_context)) && look_ahead(opt, &left, &lno, &bol)) break; eol = end_of_line(bol, &left); @@ -1035,15 +1098,20 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, /* Hit at this line. If we haven't shown the * pre-context lines, we would need to show them. */ - if (opt->pre_context) - show_pre_context(opt, name, buf, bol, lno); + if (opt->pre_context || opt->funcbody) + show_pre_context(opt, name, buf, bol, eol, lno); else if (opt->funcname) show_funcname_line(opt, name, buf, bol, lno); show_line(opt, bol, eol, name, lno, ':'); last_hit = lno; + if (opt->funcbody) + show_function = 1; + goto next_line; } - else if (last_hit && - lno <= last_hit + opt->post_context) { + if (show_function && match_funcname(opt, name, bol, eol)) + show_function = 0; + if (show_function || + (last_hit && lno <= last_hit + opt->post_context)) { /* If the last hit is within the post context, * we need to show this line. */ |