77 lines
1.5 KiB
C
77 lines
1.5 KiB
C
/***
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*mbslwr.c - Convert string lower case (MBCS)
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*
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* Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Convert string lower case (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 <ctype.h>
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#include <mbdata.h>
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#include <mbstring.h>
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#include <mbctype.h>
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/***
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* _mbslwr - Convert string lower case (MBCS)
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*
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*Purpose:
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* Convrts all the upper case characters in a string
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* to lower case in place. MBCS chars are handled
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* correctly.
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*
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* Note: Use test against 0x00FF instead of _ISLEADBYTE
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* to ensure that we don't call SBCS routine with a two-byte
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* value.
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*
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*Entry:
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* unsigned char *string = pointer to string
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*
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*Exit:
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* Returns a pointer to the input string; no error return.
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*
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*Exceptions:
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*
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*******************************************************************************/
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unsigned char * _CRTAPI1 _mbslwr( string )
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unsigned char *string;
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{
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unsigned char *cp;
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for (cp=string; *cp; cp++) {
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if (_ISLEADBYTE(*cp)) {
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#ifdef _MBCS_OS
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cp++; /* bump pointer */
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#else
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if ((_mbascii) && (*cp == _MBASCIILEAD)) {
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if ( (*(cp+1) >= (_MBUPPERLOW & 0x00FF))
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&& (*(cp+1) <= (_MBUPPERHIGH & 0x00FF))
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)
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*(cp+1) += _MBCASEDIFF;
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}
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cp++;
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#endif
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}
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else
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/* single byte, macro version */
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*cp = (unsigned char) tolower(*cp);
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}
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return( string );
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}
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#endif /* _MBCS */
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