strchr.c
上传用户:nvosite88
上传日期:2007-01-17
资源大小:4983k
文件大小:1k
- /* strchr.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"
- /******************************************************************************
- *
- * strchr - find the first occurrence of a character in a string (ANSI)
- *
- * This routine finds the first occurrence of character <c>
- * in string <s>. The terminating null is considered to be part of the string.
- *
- * INCLUDE FILES: string.h
- *
- * RETURNS:
- * The address of the located character, or NULL if the character is not found.
- */
- char * strchr
- (
- const char * s, /* string in which to search */
- int c /* character to find in string */
- )
- {
- char *r = CHAR_FROM_CONST(s);
- while (*r != (char) c) /* search loop */
- {
- if (*r++ == EOS) /* end of string */
- return (NULL);
- }
- return (r);
- }