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STRSPN(3) Library Functions Manual STRSPN(3)

strspnspan a string

library “libc”

#include <string.h>

size_t
strspn(const char *s, const char *charset);

The () function spans the initial part of the null-terminated string s as long as the characters from s occur in the null-terminated string charset. In other words, it computes the string array index in s of the first character of s which is not in charset, else the index of the first null character.

The strspn() function returns the number of characters spanned.

memchr(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3), strsep(3), strstr(3), strtok(3)

The strspn() function conforms to ISO/IEC 9899:1990 (“ISO C90”).

June 4, 1993 DragonFly-5.6.1