From: David Bremner <bremner@debian.org> this is like the standard strspn, but with a limit on how much of a prefix is tested. --- util/string-util.c | 12 ++++++++++++ util/string-util.h | 5 +++++ 2 files changed, 17 insertions(+) diff --git a/util/string-util.c b/util/string-util.c index b9039f4..7d5deaf 100644 --- a/util/string-util.c +++ b/util/string-util.c @@ -35,6 +35,18 @@ strtok_len (char *s, const char *delim, size_t *len) } +size_t +strnspn (const char *str, size_t len, const char *accept) +{ + size_t count; + + for (count = 0; count < len && str[count] != '\0'; count++) { + if (strchr (accept, str[count]) == NULL) + break; + } + return count; +} + int double_quote_str (void *ctx, const char *str, char **buf, size_t *len) diff --git a/util/string-util.h b/util/string-util.h index 4fc7942..b46f981 100644 --- a/util/string-util.h +++ b/util/string-util.h @@ -19,6 +19,11 @@ char *strtok_len (char *s, const char *delim, size_t *len); +/* like strspn, but consider at most `n' characters of 's'. `accept' + * must be null terminated; `s' may be null terminated. + */ +size_t strnspn (const char *s, size_t n, const char *accept); + /* Copy str to dest, surrounding with double quotes. * Any internal double-quotes are doubled, i.e. a"b -> "a""b" * -- 1.7.10.4