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