63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
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/***
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*wcsrev.c - reverse a wide-character string in place
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines _wcsrev() - reverse a wchar_t string in place (not including
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* L'\0' character)
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*
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*Revision History:
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* 09-09-91 ETC Created from strrev.c.
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* 04-07-92 KRS Updated and ripped out _INTL switches.
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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 02-07-94 CFW POSIXify.
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*
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*******************************************************************************/
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#ifndef _POSIX_
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#include <cruntime.h>
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#include <string.h>
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/***
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*wchar_t *_wcsrev(string) - reverse a wide-character string in place
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*
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*Purpose:
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* Reverses the order of characters in the string. The terminating
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* null character remains in place (wide-characters).
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*
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*Entry:
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* wchar_t *string - string to reverse
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*
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*Exit:
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* returns string - now with reversed characters
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*
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*Exceptions:
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*
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*******************************************************************************/
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wchar_t * __cdecl _wcsrev (
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wchar_t * string
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)
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{
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wchar_t *start = string;
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wchar_t *left = string;
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wchar_t ch;
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while (*string++) /* find end of string */
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;
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string -= 2;
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while (left < string)
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{
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ch = *left;
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*left++ = *string;
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*string-- = ch;
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}
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return(start);
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}
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#endif /* _POSIX_ */
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