A later change will replace this optimization with a different one,
but as removing it and running the tests demonstrates no grep
semantics depend on this backend anymore.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
grep.c | 63 +++-------------------------------------------------------
grep.h | 2 --
2 files changed, 3 insertions(+), 62 deletions(-)
diff --git a/grep.c b/grep.c
index 14570c7ac1..4716217837 100644
--- a/grep.c
+++ b/grep.c
@@ -356,18 +356,6 @@ static NORETURN void compile_regexp_failed(const struct grep_pat *p,
die("%s'%s': %s", where, p->pattern, error);
}
-static int is_fixed(const char *s, size_t len)
-{
- size_t i;
-
- for (i = 0; i < len; i++) {
- if (is_regex_special(s[i]))
- return 0;
- }
-
- return 1;
-}
-
#ifdef USE_LIBPCRE1
static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt)
{
@@ -643,38 +631,12 @@ static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
p->word_regexp = opt->word_regexp;
p->ignore_case = opt->ignore_case;
+ p->fixed = opt->fixed;
if (memchr(p->pattern, 0, p->patternlen) && !opt->pcre2)
die(_("given pattern contains NULL byte (via -f <file>). This is only supported with -P under PCRE v2"));
- /*
- * Even when -F (fixed) asks us to do a non-regexp search, we
- * may not be able to correctly case-fold when -i
- * (ignore-case) is asked (in which case, we'll synthesize a
- * regexp to match the pattern that matches regexp special
- * characters literally, while ignoring case differences). On
- * the other hand, even without -F, if the pattern does not
- * have any regexp special characters and there is no need for
- * case-folding search, we can internally turn it into a
- * simple string match using kws. p->fixed tells us if we
- * want to use kws.
- */
- if (opt->fixed || is_fixed(p->pattern, p->patternlen))
- p->fixed = !p->ignore_case || !has_non_ascii(p->pattern);
-
- if (p->fixed) {
- p->kws = kwsalloc(p->ignore_case ? tolower_trans_tbl : NULL);
- kwsincr(p->kws, p->pattern, p->patternlen);
- kwsprep(p->kws);
- return;
- }
-
if (opt->fixed) {
- /*
- * We come here when the pattern has the non-ascii
- * characters we cannot case-fold, and asked to
- * ignore-case.
- */
compile_fixed_regexp(p, opt);
return;
}
@@ -1042,9 +1004,7 @@ void free_grep_patterns(struct grep_opt *opt)
case GREP_PATTERN: /* atom */
case GREP_PATTERN_HEAD:
case GREP_PATTERN_BODY:
- if (p->kws)
- kwsfree(p->kws);
- else if (p->pcre1_regexp)
+ if (p->pcre1_regexp)
free_pcre1_regexp(p);
else if (p->pcre2_pattern)
free_pcre2_pattern(p);
@@ -1104,29 +1064,12 @@ static void show_name(struct grep_opt *opt, const char *name)
opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
}
-static int fixmatch(struct grep_pat *p, char *line, char *eol,
- regmatch_t *match)
-{
- 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 = offset;
- match->rm_eo = match->rm_so + kwsm.size[0];
- return 0;
- }
-}
-
static int patmatch(struct grep_pat *p, char *line, char *eol,
regmatch_t *match, int eflags)
{
int hit;
- if (p->fixed)
- hit = !fixmatch(p, line, eol, match);
- else if (p->pcre1_regexp)
+ if (p->pcre1_regexp)
hit = !pcre1match(p, line, eol, match, eflags);
else if (p->pcre2_pattern)
hit = !pcre2match(p, line, eol, match, eflags);
diff --git a/grep.h b/grep.h
index 1875880f37..90ca435aad 100644
--- a/grep.h
+++ b/grep.h
@@ -32,7 +32,6 @@ typedef int pcre2_compile_context;
typedef int pcre2_match_context;
typedef int pcre2_jit_stack;
#endif
-#include "kwset.h"
#include "thread-utils.h"
#include "userdiff.h"
@@ -97,7 +96,6 @@ struct grep_pat {
pcre2_match_context *pcre2_match_context;
pcre2_jit_stack *pcre2_jit_stack;
uint32_t pcre2_jit_on;
- kwset_t kws;
unsigned fixed:1;
unsigned ignore_case:1;
unsigned word_regexp:1;
--
2.22.0.455.g172b71a6c5
