undef/git-commit-vandalism
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

grep: add pmatch and eflags arguments to match_one_pattern()

Browse Source 
Push pmatch and eflags to the callers of match_one_pattern(), which
allows them to specify regex execution flags and to get the location
of a match.

Since we only use the first element of the matches array and aren't
interested in submatches, no provision is made for callers to
provide a larger array.

eflags are ignored for fixed patterns, but that's OK, since they
only have a meaning in connection with regular expressions
containing ^ or $.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2009-03-07 13:30:27 +01:00 committed by Junio C Hamano
parent d7eb527d73
commit 79212772ce
1 changed files with 10 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
grep.c
View File

@ -309,11 +309,11 @@ static struct {
};
static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
enum grep_context ctx)
enum grep_context ctx,
regmatch_t *pmatch, int eflags)
{
int hit = 0;
int saved_ch = 0;
regmatch_t pmatch[10];
if ((p->token != GREP_PATTERN) &&
((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
@ -332,14 +332,10 @@ static int match_one_pattern(struct grep_pat *p, char *bol, char *eol,
}
again:
if (!p->fixed) {
regex_t *exp = &p->regexp;
hit = !regexec(exp, bol, ARRAY_SIZE(pmatch),
pmatch, 0);
}
else {
if (p->fixed)
hit = !fixmatch(p->pattern, bol, pmatch);
}
else
hit = !regexec(&p->regexp, bol, 1, pmatch, eflags);
if (hit && p->word_regexp) {
if ((pmatch[0].rm_so < 0) ||
@ -385,10 +381,11 @@ static int match_expr_eval(struct grep_expr *x, char *bol, char *eol,
enum grep_context ctx, int collect_hits)
{
int h = 0;
regmatch_t match;
switch (x->node) {
case GREP_NODE_ATOM:
h = match_one_pattern(x->u.atom, bol, eol, ctx);
h = match_one_pattern(x->u.atom, bol, eol, ctx, &match, 0);
break;
case GREP_NODE_NOT:
h = !match_expr_eval(x->u.unary, bol, eol, ctx, 0);
@ -427,12 +424,14 @@ static int match_line(struct grep_opt *opt, char *bol, char *eol,
enum grep_context ctx, int collect_hits)
{
struct grep_pat *p;
regmatch_t match;
if (opt->extended)
return match_expr(opt, bol, eol, ctx, collect_hits);
/* we do not call with collect_hits without being extended */
for (p = opt->pattern_list; p; p = p->next) {
if (match_one_pattern(p, bol, eol, ctx))
if (match_one_pattern(p, bol, eol, ctx, &match, 0))
return 1;
}
return 0;