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198 lines
3.8 KiB
198 lines
3.8 KiB
//---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1995
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//
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// File: sconv.cxx
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//
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// Contents: Ansi to Unicode conversions
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//
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// History: KrishnaG Jan 22 1996
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//----------------------------------------------------------------------------
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#include "procs.hxx"
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#pragma hdrstop
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#define NULL_TERMINATED 0
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int
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AnsiToUnicodeString(
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LPSTR pAnsi,
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LPWSTR pUnicode,
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DWORD StringLength
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)
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{
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int iReturn;
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if( StringLength == NULL_TERMINATED )
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StringLength = strlen( pAnsi );
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iReturn = MultiByteToWideChar(CP_ACP,
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MB_PRECOMPOSED,
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pAnsi,
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StringLength + 1,
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pUnicode,
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StringLength + 1 );
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//
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// Ensure NULL termination.
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//
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pUnicode[StringLength] = 0;
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return iReturn;
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}
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int
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UnicodeToAnsiString(
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LPWSTR pUnicode,
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LPSTR pAnsi,
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DWORD StringLength
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)
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{
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LPSTR pTempBuf = NULL;
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INT rc = 0;
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if( StringLength == NULL_TERMINATED ) {
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//
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// StringLength is just the
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// number of characters in the string
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//
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StringLength = wcslen( pUnicode );
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}
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//
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// WideCharToMultiByte doesn't NULL terminate if we're copying
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// just part of the string, so terminate here.
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//
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pUnicode[StringLength] = 0;
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//
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// Include one for the NULL
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//
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StringLength++;
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//
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// Unfortunately, WideCharToMultiByte doesn't do conversion in place,
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// so allocate a temporary buffer, which we can then copy:
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//
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if( pAnsi == (LPSTR)pUnicode )
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{
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pTempBuf = (LPSTR)LocalAlloc( LPTR, StringLength * 2);
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pAnsi = pTempBuf;
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}
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if( pAnsi )
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{
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rc = WideCharToMultiByte( CP_ACP,
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0,
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pUnicode,
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StringLength,
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pAnsi,
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StringLength*2,
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NULL,
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NULL );
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}
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/* If pTempBuf is non-null, we must copy the resulting string
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* so that it looks as if we did it in place:
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*/
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if( pTempBuf && ( rc > 0 ) )
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{
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pAnsi = (LPSTR)pUnicode;
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strcpy( pAnsi, pTempBuf );
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LocalFree( pTempBuf );
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}
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return rc;
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}
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LPWSTR
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AllocateUnicodeString(
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LPSTR pAnsiString
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)
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{
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LPWSTR pUnicodeString = NULL;
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if (!pAnsiString)
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return NULL;
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pUnicodeString = (LPWSTR)LocalAlloc(
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LPTR,
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strlen(pAnsiString)*sizeof(WCHAR) +sizeof(WCHAR)
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);
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if (pUnicodeString) {
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AnsiToUnicodeString(
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pAnsiString,
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pUnicodeString,
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NULL_TERMINATED
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);
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}
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return pUnicodeString;
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}
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void
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FreeUnicodeString(
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LPWSTR pUnicodeString
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)
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{
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if (!pUnicodeString)
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return;
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LocalFree(pUnicodeString);
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return;
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}
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DWORD
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ComputeMaxStrlenW(
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LPWSTR pString,
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DWORD cchBufMax
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)
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{
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DWORD cchLen;
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//
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// Include space for the NULL.
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//
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cchBufMax--;
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cchLen = wcslen(pString);
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if (cchLen > cchBufMax)
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return cchBufMax;
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return cchLen;
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}
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DWORD
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ComputeMaxStrlenA(
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LPSTR pString,
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DWORD cchBufMax
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)
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{
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DWORD cchLen;
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//
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// Include space for the NULL.
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//
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cchBufMax--;
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cchLen = lstrlenA(pString);
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if (cchLen > cchBufMax)
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return cchBufMax;
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return cchLen;
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}
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