strpbrk.c
上传用户:nvosite88
上传日期:2007-01-17
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文件大小:1k
- /* strpbrk.c - string search, 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"
- /*******************************************************************************
- *
- * strpbrk - find the first occurrence in a string of a character from a given set (ANSI)
- *
- * This routine locates the first occurrence in string <s1> of any character
- * from string <s2>.
- *
- * INCLUDE FILES: string.h
- *
- * RETURNS:
- * A pointer to the character found in <s1>, or
- * NULL if no character from <s2> occurs in <s1>.
- *
- * SEE ALSO: strcspn()
- */
- char * strpbrk
- (
- const char * s1, /* string to search */
- const char * s2 /* set of characters to look for in <s1> */
- )
- {
- char *scanp;
- int c;
- int sc;
- while ((c = *s1++) != 0) /* wait until end of string */
- {
- /* loop, searching for character */
- for (scanp = CHAR_FROM_CONST(s2); (sc = *scanp++) != 0;)
- {
- if (sc == c)
- return (CHAR_FROM_CONST(s1 - 1));
- }
- }
- return (NULL);
- }