From 646e159aa980063cde55704450db0dbd903ea814 Mon Sep 17 00:00:00 2001 From: Karel Zak Date: Tue, 10 Sep 2013 12:18:20 +0200 Subject: lib/strutils: optimalize {starts,ends}with() Signed-off-by: Karel Zak --- include/strutils.h | 43 ++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 40 insertions(+), 3 deletions(-) (limited to 'include/strutils.h') diff --git a/include/strutils.h b/include/strutils.h index 8d8a6e46c..c7fe42a63 100644 --- a/include/strutils.h +++ b/include/strutils.h @@ -102,8 +102,45 @@ extern int parse_range(const char *str, int *lower, int *upper, int def); extern int streq_except_trailing_slash(const char *s1, const char *s2); -extern char *startswith(const char *s, const char *prefix); -extern char *startswith_no_case(const char *s, const char *prefix); -extern char *endswith(const char *s, const char *postfix); +/* + * Match string beginning. + */ +static inline const char *startswith(const char *s, const char *prefix) +{ + size_t sz = prefix ? strlen(prefix) : 0; + + if (s && sz && strncmp(s, prefix, sz) == 0) + return s + sz; + return NULL; +} + +/* + * Case insensitive match string beginning. + */ +static inline const char *startswith_no_case(const char *s, const char *prefix) +{ + size_t sz = prefix ? strlen(prefix) : 0; + + if (s && sz && strncasecmp(s, prefix, sz) == 0) + return s + sz; + return NULL; +} + +/* + * Match string ending. + */ +static inline const char *endswith(const char *s, const char *postfix) +{ + size_t sl = s ? strlen(s) : 0; + size_t pl = postfix ? strlen(postfix) : 0; + + if (pl == 0) + return (char *)s + sl; + if (sl < pl) + return NULL; + if (memcmp(s + sl - pl, postfix, pl) != 0) + return NULL; + return (char *)s + sl - pl; +} #endif -- cgit v1.2.3-55-g7522