Developer's Daily | Unix by Example |
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strspn, strcspn ? search a string for a set of characters |
#include <string.h> size_t strspn(const char *s, const char *accept); size_t strcspn(const char *s, const char *reject); |
The strspn() function calculates the length of the initial segment of s which consists entirely of characters in accept. The strcspn() function calculates the length of the initial segment of s which consists entirely of characters not in reject. |
The strspn() function returns the number of characters in the initial segment of s which consist only of characters from accept. The strcspn() function returns the number of characters in the initial segment of s which are not in the string reject. |
SVID 3, POSIX, BSD 4.3, ISO 9899 |
index(3), memchr(3), rindex(3), strchr(3), strpbrk(3), strsep(3), strstr(3), strtok(3) |