From a7d0021063661a65bfa47d4ec912da4e2cfa8f9a Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 18 May 2017 20:09:29 -0600 Subject: string: Add strcspn() Add an implementation of strcspn() which returns the number of initial characters that do not match any in a rejection list. Signed-off-by: Simon Glass --- include/linux/string.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include/linux') diff --git a/include/linux/string.h b/include/linux/string.h index 718c3720a1..3606620739 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -76,6 +76,21 @@ extern __kernel_size_t strlen(const char *); #ifndef __HAVE_ARCH_STRNLEN extern __kernel_size_t strnlen(const char *,__kernel_size_t); #endif + +#ifndef __HAVE_ARCH_STRCSPN +/** + * strcspn() - find span of string without given characters + * + * Calculates the length of the initial segment of @s which consists entirely + * of bsytes not in reject. + * + * @s: string to search + * @reject: strings which cause the search to halt + * @return number of characters at the start of @s which are not in @reject + */ +size_t strcspn(const char *s, const char *reject); +#endif + #ifndef __HAVE_ARCH_STRDUP extern char * strdup(const char *); #endif -- cgit v1.2.3