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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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src
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mbtoupr.c
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C/C++ Source or Header
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1998-06-17
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87 lines
/***
*mbtoupr.c - Convert character to upper case (MBCS)
*
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Convert character to upper case (MBCS)
*
*******************************************************************************/
#ifdef _MBCS
#if defined (_WIN32)
#include <awint.h>
#endif /* defined (_WIN32) */
#include <cruntime.h>
#include <ctype.h>
#include <mbdata.h>
#include <mbctype.h>
#include <mbstring.h>
/***
* _mbctoupper - Convert character to upper case (MBCS)
*
*Purpose:
* If the given character is lower case, convert to upper case.
* Handles MBCS chars correctly.
*
* Note: Use test against 0x00FF instead of _ISLEADBYTE
* to ensure that we don't call SBCS routine with a two-byte
* value.
*
*Entry:
* unsigned int c = character to convert
*
*Exit:
* Returns converted character
*
*Exceptions:
*
*******************************************************************************/
unsigned int __cdecl _mbctoupper(unsigned int c)
{
unsigned char val[2];
#if defined (_WIN32)
unsigned char ret[4];
#endif /* defined (_WIN32) */
if (c > 0x00FF)
{
val[0] = (c >> 8) & 0xFF;
val[1] = c & 0xFF;
if (!_ismbblead(val[0]))
return c;
#if defined (_WIN32)
if (__crtLCMapStringA(__mblcid, LCMAP_UPPERCASE, val, 2,
ret, 2, __mbcodepage, TRUE) == 0)
return c;
c = ret[1];
c += ret[0] << 8;
return c;
#else /* defined (_WIN32) */
if (c >= _MBLOWERLOW1 && c <= _MBLOWERHIGH1)
c -= _MBCASEDIFF1;
else if (c >= _MBLOWERLOW2 && c <= _MBLOWERHIGH2)
c -= _MBCASEDIFF2;
return c;
#endif /* defined (_WIN32) */
}
else
return (unsigned int)_mbbtoupper((int)c);
}
#endif /* _MBCS */