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STRSPN(3)
STRSPN(3) FreeBSD Library Functions Manual STRSPN(3)

NAME

strspnspan a string

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include < string.h>

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

DESCRIPTION

The strspn() 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.

RETURN VALUES

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

STANDARDS

The strspn() function conforms to ISO/IEC 9899:1990 (“ISO C90”).
June 4, 1993 FreeBSD