STRSPN(3) BSD Library Functions Manual STRSPN(3)NAME
strspn, strcspn -- span a string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <string.h>
size_t
strspn(const char *s, const char *charset);
size_t
strcspn(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 of the first character of s which is not in charset, else the index of
the first null character.
The strcspn() function spans the initial part of the null-terminated string s as long as the characters from s do not occur in the null-ter-
minated string charset (it spans the complement of charset). In other words, it computes the string array index of the first character of s
which is also in charset, else the index of the first null character.
RETURN VALUES
The strspn() and strcspn() functions return the number of characters spanned.
SEE ALSO memchr(3), strchr(3), strpbrk(3), strrchr(3), strsep(3), strstr(3), strtok(3), wcsspn(3)STANDARDS
The strspn() and strcspn() functions conform to ISO/IEC 9899:1990 (``ISO C90'').
BSD May 24, 2014 BSD
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