/* strcspn.c - search string for character, string */ /* Copyright 1992-1993 Wind River Systems, Inc. */ /* modification history -------------------- 01c,25feb93,jdi documentation cleanup for 5.1. 01b,20sep92,smb documentation additions 01a,08jul92,smb written and documented. */ /* DESCRIPTION INCLUDE FILES: string.h SEE ALSO: American National Standard X3.159-1989 NOMANUAL */ #include "vxWorks.h" #include "string.h" /******************************************************************************* * * strcspn - return the string length up to the first character from a given set (ANSI) * * This routine computes the length of the maximum initial segment of string * that consists entirely of characters not included in string . * * INCLUDE FILES: string.h * * RETURNS: * The length of the string segment. * * SEE ALSO: strpbrk(), strspn() */ size_t strcspn ( const char * s1, /* string to search */ const char * s2 /* set of characters to look for in */ ) { const char *save; const char *p; char c1; char c2; for (save = s1 + 1; (c1 = *s1++) != EOS; ) /* search for EOS */ for (p = s2; (c2 = *p++) != EOS; ) /* search for first occurance */ { if (c1 == c2) return (s1 - save); /* return index of substring */ } return (s1 - save); }
