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Use strcasestr() when ignoring case, which improves performance

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This commit is contained in:
Bruce Hill 2024-01-26 13:25:08 -05:00
parent 18bb2575ca
commit 47a81dfb64
1 changed files with 4 additions and 2 deletions
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6
match.c
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@ -337,8 +337,10 @@ static match_t *_next_match(match_ctx_t *ctx, const char *str, pat_t *pat, pat_t
// Performance optimization: if the pattern starts with a string literal,
// we can just rely on the highly optimized memmem() implementation to skip
// past areas where we know we won't find a match.
if (!skip && first->type == BP_STRING && first->min_matchlen > 0 && !ctx->ignorecase) {
char *found = memmem(str, (size_t)(ctx->end - str), Match(first, BP_STRING)->string, first->min_matchlen);
if (!skip && first->type == BP_STRING && first->min_matchlen > 0) {
char *found = ctx->ignorecase ?
strcasestr(str, Match(first, BP_STRING)->string)
: memmem(str, (size_t)(ctx->end - str), Match(first, BP_STRING)->string, first->min_matchlen);
str = found ? found : ctx->end;
} else if (!skip && str > ctx->start && (first->type == BP_START_OF_LINE || first->type == BP_END_OF_LINE)) {
char *found = memchr(str, '\n', (size_t)(ctx->end - str));