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SYNOPSIS #include <string.h> size_t strspn(const char *s1, const char *s2);
DESCRIPTION
strspn
computes the length of the initial segment of the string pointed to by
s1
which consists entirely of characters from the string pointed to by s2
(excluding the terminating null character).
RETURNS
strspn
returns the length of the segment found.
COMPLIANCE
strspn
is ANSI C.
strspn requires no supporting OS subroutines.
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