190 lines
5.5 KiB
C
190 lines
5.5 KiB
C
//Copyright (c) 1998 - 1999 Microsoft Corporation
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/*++
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Module Name:
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conv.h
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Abstract:
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UNICODE / ASCII conversion macros
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Author:
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Hakki T. Bostanci (hakkib) 5-Aug-1998
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Revision History:
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--*/
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#ifndef USES_CONVERSION
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// USES_CONVERSION must be defined in every function that uses the
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// conversion macros
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#define USES_CONVERSION int __nLength; PCWSTR __pUnicode; PCSTR __pAscii
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//////////////////////////////////////////////////////////////////////////
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//
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// W2A
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//
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// Routine Description:
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// Converts a UNICODE string to ASCII. Allocates the coversion buffer
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// off the stack using _alloca
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//
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// Arguments:
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// pStr UNICODE string
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//
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// Return Value:
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// the converted ASCII string
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//
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#define W2A(pStr) \
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\
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((__pUnicode = pStr) == 0 ? (PSTR) 0 : ( \
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\
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__nLength = WideCharToMultiByte( \
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CP_ACP, \
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0, \
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__pUnicode, \
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-1, \
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0, \
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0, \
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0, \
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0 \
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), \
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\
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__pAscii = (PCSTR) _alloca(__nLength * sizeof(CHAR)), \
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\
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WideCharToMultiByte( \
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CP_ACP, \
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0, \
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__pUnicode, \
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-1, \
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(PSTR) __pAscii, \
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__nLength, \
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0, \
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0 \
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), \
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\
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(PSTR) __pAscii)) \
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//////////////////////////////////////////////////////////////////////////
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//
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// A2W
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//
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// Routine Description:
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// Converts an ASCII string to UNICODE. Allocates the coversion buffer
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// off the stack using _alloca
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//
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// Arguments:
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// pStr ASCII string
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//
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// Return Value:
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// the converted UNICODE string
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//
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#define A2W(pStr) \
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\
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((__pAscii = pStr) == 0 ? (PWSTR) 0 : ( \
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\
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__nLength = MultiByteToWideChar( \
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CP_ACP, \
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MB_PRECOMPOSED, \
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__pAscii, \
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-1, \
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0, \
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0 \
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), \
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\
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__pUnicode = (PCWSTR) _alloca(__nLength * sizeof(WCHAR)), \
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\
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MultiByteToWideChar( \
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CP_ACP, \
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MB_PRECOMPOSED, \
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__pAscii, \
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-1, \
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(PWSTR) __pUnicode, \
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__nLength \
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), \
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\
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(PWSTR) __pUnicode)) \
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//////////////////////////////////////////////////////////////////////////
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//
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// T2A, A2T, T2W, W2T
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//
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// Routine Description:
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// These macros expand to the corresponding correct form according to the
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// #definition of UNICODE.
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//
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// We use the cryptic form (__nLength, __pAscii, __pUnicode, pStr) to avoid
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// the compiler warning "symbol defined but not used" due to the variables
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// defined in USES_CONVERSION macro.
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//
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#ifdef UNICODE
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#define T2A(pStr) W2A(pStr)
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#define A2T(pStr) A2W(pStr)
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#define T2W(pStr) (__nLength, __pAscii, __pUnicode, pStr)
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#define W2T(pStr) (__nLength, __pAscii, __pUnicode, pStr)
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#define T2DA(pStr) W2A(pStr)
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#define A2DT(pStr) A2W(pStr)
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#define T2DW(pStr) _wcsdupa(pStr)
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#define W2DT(pStr) _wcsdupa(pStr)
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#else //UNICODE
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#define T2A(pStr) (__nLength, __pAscii, __pUnicode, pStr)
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#define A2T(pStr) (__nLength, __pAscii, __pUnicode, pStr)
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#define T2W(pStr) A2W(pStr)
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#define W2T(pStr) W2A(pStr)
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#define T2DA(pStr) _strdupa(pStr)
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#define A2DT(pStr) _strdupa(pStr)
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#define T2DW(pStr) A2W(pStr)
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#define W2DT(pStr) W2A(pStr)
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#endif //UNICODE
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//////////////////////////////////////////////////////////////////////////
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//
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// _tcsdupa
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//
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// Routine Description:
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// Duplicates a string to a buffer allocated off the stack using _alloca
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//
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// Arguments:
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// pStr input string
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//
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// Return Value:
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// duplicated string
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//
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#define _wcsdupa(pStr) \
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\
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(__pAscii, (__pUnicode = pStr) == 0 ? (PWSTR) 0 : ( \
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\
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__nLength = wcslen(__pUnicode) + 1, \
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\
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wcscpy((PWSTR) _alloca(__nLength * sizeof(WCHAR)), __pUnicode))) \
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#define _strdupa(pStr) \
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\
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(__pUnicode, (__pAscii = pStr) == 0 ? (PSTR) 0 : ( \
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\
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__nLength = strlen(__pAscii) + 1, \
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\
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strcpy((PSTR) _alloca(__nLength * sizeof(CHAR)), __pAscii))) \
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#ifdef UNICODE
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#define _tcsdupa _wcsdupa
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#else
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#define _tcsdupa _strdupa
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#endif
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#endif //USES_CONVERSION
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