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