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1//
2// wcsrev.cpp
3//
4// Copyright (c) Microsoft Corporation. All rights reserved.
5//
6// Defines _wcsrev(), which reverses a wide chraacter string in place. The
7// pointer to the string is returned.
8//
9#include <string.h>
10
11
12
13extern "C" wchar_t* __cdecl _wcsrev(wchar_t* const string)
14{
15 // Find the end of the string:
16 wchar_t* right = string;
17 while (*right++) { }
18 right -= 2;
19
20 // Reverse the strong:
21 wchar_t* left = string;
22 while (left < right)
23 {
24 wchar_t const c = *left;
25 *left++ = *right;
26 *right-- = c;
27 }
28
29 return string;
30}