73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/***
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*mbsrev.c - Reverse a string in place (MBCS)
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*
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* Copyright (c) 1988-1992, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Reverse a string in place (MBCS)
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*
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*Revision History:
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* 11-19-92 KRS Ported from 16-bit sources.
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*
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*******************************************************************************/
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#ifdef _MBCS
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#include <cruntime.h>
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#include <mbdata.h>
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#include <mbctype.h>
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#include <mbstring.h>
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/***
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* _mbsrev - Reverse a string in place (MBCS)
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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. The order of MBCS characters
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* is not changed.
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*
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*Entry:
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* unsigned char *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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unsigned char * _CRTAPI1 _mbsrev(string)
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unsigned char *string;
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{
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unsigned char *start = string;
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unsigned char *left = string;
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unsigned char c;
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/* first go through and reverse the bytes in MBCS chars */
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while ( *string ) {
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if ( _ISLEADBYTE(*string++) ) {
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if ( *string ) {
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c = *string;
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*string = *(string - 1);
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*(string - 1) = c;
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string++;
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}
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else /* second byte is EOS */
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break;
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}
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}
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/* now reverse the whole string */
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string--;
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while ( left < string ) {
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c = *left;
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*left++ = *string;
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*string-- = c;
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}
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return ( start );
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}
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#endif /* _MBCS */
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