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STRSPN(3)                BSD Library Functions Manual                STRSPN(3)

NAME
     strspn -- span a string

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <string.h>

     size_t
     strspn(const char *s1, const char *s2);

DESCRIPTION
     The strspn() function spans the initial part of the null-terminated string s1, as long as the charac-ters characters
     ters from s1 occur in the null-terminated string s2.  In other words, it computes the string array
     index in s1 of the first character of s1 which is not in s2, else the index of the first null charac-ter. character.
     ter.

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

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

STANDARDS
     The strspn() function conforms to ISO/IEC 9899:1990 (``ISO C90'').

BSD                              June 4, 1993                              BSD