NAME

strcspn — span the complement of a string

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include < string.h>

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

DESCRIPTION

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

RETURN VALUES

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

SEE ALSO

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

STANDARDS

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