66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
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/***
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*towlower.c - convert wide character to lower case
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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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* Defines towlower().
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*
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*Revision History:
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* 10-11-91 ETC Created.
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* 12-10-91 ETC Updated nlsapi; added multithread.
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* 04-06-92 KRS Make work without _INTL also.
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* 01-19-93 CFW Changed LCMapString to LCMapStringW.
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* 06-02-93 SRW ignore _INTL if _NTSUBSET_ defined.
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* 06-11-93 CFW Fix error handling bug.
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*
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*******************************************************************************/
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#include <windows.h>
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#include <cruntime.h>
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/***
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*wchar_t towlower(c) - convert wide character to lower case
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*
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*Purpose:
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* towlower() returns the lowercase equivalent of its argument
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*
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*Entry:
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* c - wchar_t value of character to be converted
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*
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*Exit:
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* if c is an upper case letter, returns wchar_t value of lower case
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* representation of c. otherwise, it returns c.
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*
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*Exceptions:
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*
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*******************************************************************************/
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wchar_t _CALLTYPE1 towlower (
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wchar_t c
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)
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{
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// If we're in the first 128 characters, it's just ANSII...
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if (c < 128) {
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return (wchar_t)CharLowerA((LPSTR)c);
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} else {
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WCHAR wBuffer[2];
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CHAR Buffer[8];
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int Length;
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BOOL fDefaultChar;
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wBuffer[0] = c;
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Length = WideCharToMultiByte (CP_ACP, WC_COMPOSITECHECK, wBuffer, 1, Buffer, sizeof (Buffer), NULL, &fDefaultChar);
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if (fDefaultChar == FALSE)
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{
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Buffer[Length] = '\0';
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CharLowerA (Buffer);
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MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, Buffer, Length, wBuffer, 1);
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}
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return wBuffer[0];
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}
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}
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