50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// File: wcsrchr.c
|
||
|
|
//
|
||
|
|
// Contents: This file contains the src for the wcsrchr() function.
|
||
|
|
//
|
||
|
|
// Classes: none
|
||
|
|
//
|
||
|
|
// History: 09-Oct-91 chrismay created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Function: wcsrchr()
|
||
|
|
//
|
||
|
|
// Synopsis: This function finds the last occurrence of the specified wide
|
||
|
|
// character in a wide-character string.
|
||
|
|
//
|
||
|
|
// Arguments: wsz - wide character string, zero terminated
|
||
|
|
// wc - wide character to be found in wsz
|
||
|
|
//
|
||
|
|
// Returns: returns a pointer to the beginning of the substring that
|
||
|
|
// begins with the last occurrence of the character if found,
|
||
|
|
// else returns NULL.
|
||
|
|
//
|
||
|
|
// Warnings: only works on wide-character ASCII
|
||
|
|
//
|
||
|
|
// History: 15-Oct-91 chrismay created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
wchar_t *__cdecl wcsrchr(const wchar_t *wcs, wchar_t wc)
|
||
|
|
{
|
||
|
|
wchar_t *start = (wchar_t *)wcs;
|
||
|
|
|
||
|
|
while (*wcs++) /* find end of string */
|
||
|
|
;
|
||
|
|
/* search towards front */
|
||
|
|
while (--wcs != start && *wcs != wc)
|
||
|
|
;
|
||
|
|
|
||
|
|
if (*wcs == wc) /* character found ? */
|
||
|
|
return (wchar_t *)wcs;
|
||
|
|
return NULL;
|
||
|
|
}
|