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- /* File : strcspn.c
- Author : Richard A. O'Keefe.
- Updated: 11 April 1984
- Defines: strspn()
-
- strcspn(s1, s2) returns the length of the longest prefix of s1
- consisting entirely of characters which are NOT in s2 ("c" is
- "complement"). NUL is considered to be part of s2. As _str2set
- will never include NUL in a set, we have to check for it explicitly.
- */
-
- #include "strings.h"
- #include "_str2set.h"
-
- int strcspn(str, set)
- register _char_ *str;
- char *set;
- {
- register int L;
-
- _str2set(set);
- for (L = 0; *str && _set_vec[*str++] != _set_ctr; L++) ;
- return L;
- }
-