#include "cache.h"
#include "grep.h"
+#include "userdiff.h"
#include "xdiff-interface.h"
void append_header_grep_pattern(struct grep_opt *opt, enum grep_header_field field, const char *pat)
p->next = NULL;
}
-static int is_fixed(const char *s)
-{
- while (*s && !is_regex_special(*s))
- s++;
- return !*s;
-}
-
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;
- if (opt->fixed || is_fixed(p->pattern))
+ if (opt->fixed)
p->fixed = 1;
if (opt->regflags & REG_ICASE)
p->fixed = 0;
printf("%s%c", name, opt->null_following_name ? '\0' : '\n');
}
-static int fixmatch(const char *pattern, char *line, regmatch_t *match)
+
+static int fixmatch(const char *pattern, char *line, int ignore_case, regmatch_t *match)
{
- char *hit = strstr(line, pattern);
+ char *hit;
+ if (ignore_case)
+ hit = strcasestr(line, pattern);
+ else
+ hit = strstr(line, pattern);
+
if (!hit) {
match->rm_so = match->rm_eo = -1;
return REG_NOMATCH;
again:
if (p->fixed)
- hit = !fixmatch(p->pattern, bol, pmatch);
+ hit = !fixmatch(p->pattern, bol, p->ignore_case, pmatch);
else
hit = !regexec(&p->regexp, bol, 1, pmatch, eflags);
printf("%.*s\n", rest, bol);
}
+static int match_funcname(struct grep_opt *opt, char *bol, char *eol)
+{
+ xdemitconf_t *xecfg = opt->priv;
+ if (xecfg && xecfg->find_func) {
+ char buf[1];
+ return xecfg->find_func(bol, eol - bol, buf, 1,
+ xecfg->find_func_priv) >= 0;
+ }
+
+ if (bol == eol)
+ return 0;
+ if (isalpha(*bol) || *bol == '_' || *bol == '$')
+ return 1;
+ return 0;
+}
+
+static void show_funcname_line(struct grep_opt *opt, const char *name,
+ char *buf, char *bol, unsigned lno)
+{
+ while (bol > buf) {
+ char *eol = --bol;
+
+ while (bol > buf && bol[-1] != '\n')
+ bol--;
+ lno--;
+
+ if (lno <= opt->last_shown)
+ break;
+
+ if (match_funcname(opt, bol, eol)) {
+ show_line(opt, bol, eol, name, lno, '=');
+ break;
+ }
+ }
+}
+
static void show_pre_context(struct grep_opt *opt, const char *name, char *buf,
char *bol, unsigned lno)
{
- unsigned cur = lno, from = 1;
+ unsigned cur = lno, from = 1, funcname_lno = 0;
+ int funcname_needed = opt->funcname;
if (opt->pre_context < lno)
from = lno - opt->pre_context;
/* Rewind. */
while (bol > buf && cur > from) {
- bol--;
+ char *eol = --bol;
+
while (bol > buf && bol[-1] != '\n')
bol--;
cur--;
+ if (funcname_needed && match_funcname(opt, bol, eol)) {
+ funcname_lno = cur;
+ funcname_needed = 0;
+ }
}
+ /* We need to look even further back to find a function signature. */
+ if (opt->funcname && funcname_needed)
+ show_funcname_line(opt, name, buf, bol, cur);
+
/* Back forward. */
while (cur < lno) {
- char *eol = bol;
+ char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
while (*eol != '\n')
eol++;
- show_line(opt, bol, eol, name, cur, '-');
+ show_line(opt, bol, eol, name, cur, sign);
bol = eol + 1;
cur++;
}
}
+static int should_lookahead(struct grep_opt *opt)
+{
+ struct grep_pat *p;
+
+ if (opt->extended)
+ return 0; /* punt for too complex stuff */
+ if (opt->invert)
+ return 0;
+ for (p = opt->pattern_list; p; p = p->next) {
+ if (p->token != GREP_PATTERN)
+ return 0; /* punt for "header only" and stuff */
+ }
+ return 1;
+}
+
+static int look_ahead(struct grep_opt *opt,
+ unsigned long *left_p,
+ unsigned *lno_p,
+ char **bol_p)
+{
+ unsigned lno = *lno_p;
+ char *bol = *bol_p;
+ struct grep_pat *p;
+ char *sp, *last_bol;
+ regoff_t earliest = -1;
+
+ for (p = opt->pattern_list; p; p = p->next) {
+ int hit;
+ regmatch_t m;
+
+ if (p->fixed)
+ hit = !fixmatch(p->pattern, bol, p->ignore_case, &m);
+ else
+ hit = !regexec(&p->regexp, bol, 1, &m, 0);
+ if (!hit || m.rm_so < 0 || m.rm_eo < 0)
+ continue;
+ if (earliest < 0 || m.rm_so < earliest)
+ earliest = m.rm_so;
+ }
+
+ if (earliest < 0) {
+ *bol_p = bol + *left_p;
+ *left_p = 0;
+ return 1;
+ }
+ for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
+ ; /* find the beginning of the line */
+ last_bol = sp;
+
+ for (sp = bol; sp < last_bol; sp++) {
+ if (*sp == '\n')
+ lno++;
+ }
+ *left_p -= last_bol - bol;
+ *bol_p = last_bol;
+ *lno_p = lno;
+ return 0;
+}
+
static int grep_buffer_1(struct grep_opt *opt, const char *name,
char *buf, unsigned long size, int collect_hits)
{
unsigned last_hit = 0;
int binary_match_only = 0;
unsigned count = 0;
+ int try_lookahead = 0;
enum grep_context ctx = GREP_CONTEXT_HEAD;
+ xdemitconf_t xecfg;
opt->last_shown = 0;
}
}
+ 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;
+ }
+ }
+ try_lookahead = should_lookahead(opt);
+
while (left) {
char *eol, ch;
int hit;
+ /*
+ * look_ahead() skips quicly to the line that possibly
+ * has the next hit; don't call it if we need to do
+ * something more than just skipping the current line
+ * in response to an unmatch for the current line. E.g.
+ * inside a post-context window, we will show the current
+ * line as a context around the previous hit when it
+ * doesn't hit.
+ */
+ if (try_lookahead
+ && !(last_hit
+ && lno <= last_hit + opt->post_context)
+ && look_ahead(opt, &left, &lno, &bol))
+ break;
eol = end_of_line(bol, &left);
ch = *eol;
*eol = 0;
*/
if (opt->pre_context)
show_pre_context(opt, name, buf, bol, lno);
+ else if (opt->funcname)
+ show_funcname_line(opt, name, buf, bol, lno);
if (!opt->count)
show_line(opt, bol, eol, name, lno, ':');
last_hit = lno;
return 1;
}
+ xdiff_clear_find_func(&xecfg);
+ opt->priv = NULL;
+
/* NEEDSWORK:
* The real "grep -c foo *.c" gives many "bar.c:0" lines,
* which feels mostly useless but sometimes useful. Maybe