windows-nt/Source/XPSP1/NT/printscan/wia/common/stirt/string.cpp

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 1997 Microsoft Corporation
Module Name:
string.cpp
Abstract:
Author:
Vlad Sadovsky (vlads) 26-Jan-1997
Revision History:
26-Jan-1997 VladS created
--*/
//
// Normal includes only for this module to be active
//
#include "cplusinc.h"
#include "sticomm.h"
//
// Private Definations
//
//
// When appending data, this is the extra amount we request to avoid
// reallocations
//
#define STR_SLOP 128
//
// Converts a value between zero and fifteen to the appropriate hex digit
//
#define HEXDIGIT( nDigit ) \
(TCHAR)((nDigit) > 9 ? \
(nDigit) - 10 + 'A' \
: (nDigit) + '0')
//
// Converts a single hex digit to its decimal equivalent
//
#define TOHEX( ch ) \
((ch) > '9' ? \
(ch) >= 'a' ? \
(ch) - 'a' + 10 : \
(ch) - 'A' + 10 \
: (ch) - '0')
//
// Private Globals
//
WCHAR STR::_pszEmptyString[] = L"";
//
// Construction/Destruction
//
STR::STR( const CHAR * pchInit )
{
AuxInit( (PBYTE) pchInit, FALSE );
}
STR::STR( const WCHAR * pwchInit )
{
AuxInit( (PBYTE) pwchInit, TRUE );
}
STR::STR( const STR & str )
{
AuxInit( (PBYTE) str.QueryPtr(), str.IsUnicode() );
}
VOID STR::AuxInit( PBYTE pInit, BOOL fUnicode )
{
BOOL fRet;
_fUnicode = fUnicode;
_fValid = TRUE;
if ( pInit )
{
INT cbCopy = fUnicode ? (::wcslen( (WCHAR *) pInit ) + 1) * sizeof(WCHAR) :
(::strlen( (CHAR *) pInit ) + 1) * sizeof(CHAR);
fRet = Resize( cbCopy );
if ( !fRet )
{
_fValid = FALSE;
return;
}
::memcpy( QueryPtr(), pInit, cbCopy );
}
}
//
// Appends the string onto this one.
//
BOOL STR::Append( const CHAR * pchStr )
{
if ( pchStr )
{
ASSERT( !IsUnicode() );
return AuxAppend( (PBYTE) pchStr, ::strlen( pchStr ) );
}
return TRUE;
}
BOOL STR::Append( const WCHAR * pwchStr )
{
if ( pwchStr )
{
ASSERT( IsUnicode() );
return AuxAppend( (PBYTE) pwchStr, ::wcslen( pwchStr ) * sizeof(WCHAR) );
}
return TRUE;
}
BOOL STR::Append( const STR & str )
{
if ( str.IsUnicode() )
return Append( (const WCHAR *) str.QueryStrW() );
else
return Append( (const CHAR *) str.QueryStrA() );
}
BOOL STR::AuxAppend( PBYTE pStr, UINT cbStr, BOOL fAddSlop )
{
ASSERT( pStr != NULL );
UINT cbThis = QueryCB();
//
// Only resize when we have to. When we do resize, we tack on
// some extra space to avoid extra reallocations.
//
// Note: QuerySize returns the requested size of the string buffer,
// *not* the strlen of the buffer
//
if ( QuerySize() < cbThis + cbStr + sizeof(WCHAR) )
{
if ( !Resize( cbThis + cbStr + (fAddSlop ? STR_SLOP : sizeof(WCHAR) )) )
return FALSE;
}
memcpy( (BYTE *) QueryPtr() + cbThis,
pStr,
cbStr + (IsUnicode() ? sizeof(WCHAR) : sizeof(CHAR)) );
return TRUE;
}
//
// Convert in place
//
BOOL STR::ConvertToW(VOID)
{
if (IsUnicode()) {
return TRUE;
}
UINT cbNeeded = (QueryCB()+1)*sizeof(WCHAR);
//
// Only resize when we have to.
//
if ( QuerySize() < cbNeeded ) {
if ( !Resize( cbNeeded)) {
return FALSE;
}
}
BUFFER buf(cbNeeded);
if (!buf.QueryPtr()) {
return FALSE;
}
int iRet;
int cch;
cch = QueryCCH() + 1;
iRet = MultiByteToWideChar( CP_ACP,
MB_PRECOMPOSED,
QueryStrA(),
-1,
(WCHAR *)buf.QueryPtr(),
cch);
if ( iRet == 0 ) {
//
// Error in conversion.
//
return FALSE;
}
memcpy( (BYTE *) QueryPtr(),
buf.QueryPtr(),
cbNeeded);
SetUnicode(TRUE);
return TRUE;
}
BOOL STR::ConvertToA(VOID)
{
if (!IsUnicode()) {
return TRUE;
}
UINT cbNeeded = (QueryCB()+1)*sizeof(CHAR);
BUFFER buf(cbNeeded);
if (!buf.QueryPtr()) {
return FALSE;
}
int iRet;
int cch;
cch = cbNeeded;
iRet = WideCharToMultiByte(CP_ACP,
0L,
QueryStrW(),
-1,
(CHAR *)buf.QueryPtr(),
cch,
NULL,
NULL
);
if ( iRet == 0 ) {
//
// Error in conversion.
//
return FALSE;
}
// Careful here , there might be DBCS characters in resultant buffer
memcpy( (BYTE *) QueryPtr(),
buf.QueryPtr(),
iRet);
SetUnicode(FALSE);
return TRUE;
}
//
// Copies the string into this one.
//
BOOL STR::Copy( const CHAR * pchStr )
{
_fUnicode = FALSE;
if ( QueryPtr() )
*(QueryStrA()) = '\0';
if ( pchStr )
{
return AuxAppend( (PBYTE) pchStr, ::strlen( pchStr ), FALSE );
}
return TRUE;
}
BOOL STR::Copy( const WCHAR * pwchStr )
{
_fUnicode = TRUE;
if ( QueryPtr() )
*(QueryStrW()) = TEXT('\0');
if ( pwchStr )
{
return AuxAppend( (PBYTE) pwchStr, ::wcslen( pwchStr ) * sizeof(WCHAR), FALSE );
}
return TRUE;
}
BOOL STR::Copy( const STR & str )
{
_fUnicode = str.IsUnicode();
if ( str.IsEmpty() && QueryPtr() == NULL) {
// To avoid pathological allocation of small chunk of memory
return ( TRUE);
}
if ( str.IsUnicode() )
return Copy( str.QueryStrW() );
else
return Copy( str.QueryStrA() );
}
//
// Resizes or allocates string memory, NULL terminating if necessary
//
BOOL STR::Resize( UINT cbNewRequestedSize )
{
BOOL fTerminate = QueryPtr() == NULL;
if ( !BUFFER::Resize( cbNewRequestedSize ))
return FALSE;
if ( fTerminate && cbNewRequestedSize > 0 )
{
if ( IsUnicode() )
{
ASSERT( cbNewRequestedSize > 1 );
*QueryStrW() = TEXT('\0');
}
else
*QueryStrA() = '\0';
}
return TRUE;
}
//
// Loads a string resource from this module's string table
// or from the system string table
//
// dwResID - System error or module string ID
// lpszModuleName - name of the module from which to load.
// If NULL, then load the string from system table.
//
//
BOOL STR::LoadString( IN DWORD dwResID,
IN LPCTSTR lpszModuleName // Optional
)
{
BOOL fReturn = FALSE;
INT cch;
//
// If lpszModuleName is NULL, load the string from system's string table.
//
if ( lpszModuleName == NULL) {
BYTE * pchBuff = NULL;
//
// Call the appropriate function so we don't have to do the Unicode
// conversion
//
if ( IsUnicode() ) {
cch = ::FormatMessageW( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_MAX_WIDTH_MASK |
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
dwResID,
0,
(LPWSTR) &pchBuff,
1024,
NULL );
if ( cch ) {
fReturn = Copy( (LPCWSTR) pchBuff );
}
}
else
{
cch = ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_IGNORE_INSERTS |
FORMAT_MESSAGE_MAX_WIDTH_MASK |
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
dwResID,
0,
(LPSTR) &pchBuff,
1024,
NULL );
if ( cch ) {
fReturn = Copy( (LPCSTR) pchBuff );
}
}
//
// Free the buffer FormatMessage allocated
//
if ( cch )
{
::LocalFree( (VOID*) pchBuff );
}
} else {
WCHAR ach[STR_MAX_RES_SIZE];
if ( IsUnicode() )
{
cch = ::LoadStringW( GetModuleHandle( lpszModuleName),
dwResID,
(WCHAR *) ach,
sizeof(ach));
if ( cch )
{
fReturn = Copy( (LPWSTR) ach );
}
}
else
{
cch = ::LoadStringA( GetModuleHandle( lpszModuleName),
dwResID,
(CHAR *) ach,
sizeof(ach));
if ( cch )
{
fReturn = Copy( (LPSTR) ach );
}
}
}
return ( fReturn);
} // STR::LoadString()
BOOL STR::LoadString( IN DWORD dwResID,
IN HMODULE hModule
)
{
BOOL fReturn = FALSE;
INT cch;
WCHAR ach[STR_MAX_RES_SIZE];
if ( IsUnicode()) {
cch = ::LoadStringW(hModule,
dwResID,
(WCHAR *) ach,
sizeof(ach));
if ( cch ) {
fReturn = Copy( (LPWSTR) ach );
}
} else {
cch = ::LoadStringA(hModule,
dwResID,
(CHAR *) ach,
sizeof(ach));
if ( cch ) {
fReturn = Copy( (LPSTR) ach );
}
}
return ( fReturn);
} // STR::LoadString()
BOOL
STR::FormatStringV(
IN LPCTSTR lpszModuleName,
...
)
{
DWORD cch;
LPSTR pchBuff;
BOOL fRet = FALSE;
DWORD dwErr;
va_list va;
va_start(va,lpszModuleName);
cch = ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_STRING,
QueryStrA(),
0L,
0,
(LPSTR) &pchBuff,
1024,
&va);
dwErr = ::GetLastError();
if ( cch ) {
fRet = Copy( (LPCSTR) pchBuff );
::LocalFree( (VOID*) pchBuff );
}
return fRet;
}
BOOL
STR::FormatString(
IN DWORD dwResID,
IN LPCTSTR apszInsertParams[],
IN LPCTSTR lpszModuleName
)
{
DWORD cch;
LPSTR pchBuff;
BOOL fRet;
if (!dwResID) {
cch = ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_ARGUMENT_ARRAY |
FORMAT_MESSAGE_FROM_STRING,
QueryStrA(),
dwResID,
0,
(LPSTR) &pchBuff,
1024,
(va_list *) apszInsertParams );
}
else {
cch = ::FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_ARGUMENT_ARRAY |
FORMAT_MESSAGE_FROM_HMODULE,
GetModuleHandle( lpszModuleName ),
dwResID,
0,
(LPSTR) &pchBuff,
1024,
(va_list *) apszInsertParams );
}
if ( cch )
{
fRet = Copy( (LPCSTR) pchBuff );
::LocalFree( (VOID*) pchBuff );
}
return fRet;
}
#if 1
CHAR * STR::QueryStrA( VOID ) const
{
ASSERT( !IsUnicode() );
ASSERT( *_pszEmptyString == TEXT('\0') );
return (QueryPtr() ? (CHAR *) QueryPtr() : (CHAR *) _pszEmptyString);
}
WCHAR * STR::QueryStrW( VOID ) const
{
ASSERT( IsUnicode() );
ASSERT( *_pszEmptyString == TEXT('\0') );
return (QueryPtr() ? (WCHAR *) QueryPtr() : (WCHAR *) _pszEmptyString);
}
#endif //DBG
BOOL STR::CopyToBuffer( WCHAR * lpszBuffer, LPDWORD lpcch) const
/*++
Description:
Copies the string into the WCHAR buffer passed in if the buffer
is sufficient to hold the translated string.
If the buffer is small, the function returns small and sets *lpcch
to contain the required number of characters.
Arguments:
lpszBuffer pointer to WCHAR buffer which on return contains
the UNICODE version of string on success.
lpcch pointer to DWORD containing the length of the buffer.
If *lpcch == 0 then the function returns TRUE with
the count of characters required stored in *lpcch.
Also in this case lpszBuffer is not affected.
Returns:
TRUE on success.
FALSE on failure. Use GetLastError() for further details.
--*/
{
BOOL fReturn = TRUE;
if ( lpcch == NULL) {
SetLastError( ERROR_INVALID_PARAMETER);
return ( FALSE);
}
if ( *lpcch == 0) {
//
// Inquiring the size of buffer alone
//
*lpcch = QueryCCH() + 1; // add one character for terminating null
} else {
//
// Copy data to buffer
//
if ( IsUnicode()) {
//
// Do plain copy of the data.
//
if ( *lpcch >= QueryCCH()) {
wcscpy( lpszBuffer, QueryStrW());
} else {
SetLastError( ERROR_INSUFFICIENT_BUFFER);
fReturn = FALSE;
}
} else {
//
// Copy after conversion from ANSI to Unicode
//
int iRet;
iRet = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED,
QueryStrA(), QueryCCH() + 1,
lpszBuffer, (int )*lpcch);
if ( iRet == 0 || iRet != (int ) *lpcch) {
//
// Error in conversion.
//
fReturn = FALSE;
}
}
}
return ( fReturn);
} // STR::CopyToBuffer()
BOOL STR::CopyToBufferA( CHAR * lpszBuffer, LPDWORD lpcch) const
/*++
Description:
Copies the string into the CHAR buffer passed in if the buffer
is sufficient to hold the translated string.
If the buffer is small, the function returns small and sets *lpcch
to contain the required number of characters.
Arguments:
lpszBuffer pointer to CHAR buffer which on return contains
the MBCS version of string on success.
lpcch pointer to DWORD containing the length of the buffer.
If *lpcch == 0 then the function returns TRUE with
the count of characters required stored in *lpcch.
Also in this case lpszBuffer is not affected.
Returns:
TRUE on success.
FALSE on failure. Use GetLastError() for further details.
--*/
{
BOOL fReturn = TRUE;
if ( lpcch == NULL) {
SetLastError( ERROR_INVALID_PARAMETER);
return ( FALSE);
}
if ( *lpcch == 0) {
//
// Inquiring the size of buffer alone
//
*lpcch = 2*(QueryCCH() + 1); // add one character for terminating null and on pessimistic side
// ask for largest possible buffer
} else {
//
// Copy data to buffer
//
if ( !IsUnicode()) {
lstrcpyA( lpszBuffer, QueryStrA());
} else {
//
// Copy after conversion from Unicode to MBCS
//
int iRet;
iRet = WideCharToMultiByte(CP_ACP,
0L,
QueryStrW(),
QueryCCH()+1,
lpszBuffer,
*lpcch,
NULL,NULL
);
if ( iRet == 0 || *lpcch < (DWORD)iRet) {
*lpcch = iRet;
fReturn = FALSE;
}
}
}
return ( fReturn);
} // STR::CopyToBuffer()
/*
STRArray class implementation- this isn't very efficient, as
we'll copy every string over again whenever we grow the array, but
then again, that part of the code may never even get executed, anyway
*/
void STRArray::Grow() {
// We need to add some more strings to the array
STR *pcsNew = new STR[m_ucMax += m_uGrowBy];
if (!pcsNew) {
// We recover gracelessly by replacing the final
// string.
m_ucMax -= m_uGrowBy;
m_ucItems--;
return;
}
for (unsigned u = 0; u < m_ucItems; u++)
pcsNew[u] = (LPCTSTR) m_pcsContents[u];
delete[] m_pcsContents;
m_pcsContents = pcsNew;
}
STRArray::STRArray(unsigned uGrowBy) {
m_uGrowBy = uGrowBy ? uGrowBy : 10;
m_ucItems = m_ucMax = 0;
m_pcsContents = NULL;
}
STRArray::~STRArray() {
if (m_pcsContents)
delete[] m_pcsContents;
}
void STRArray::Add(LPCSTR lpstrNew) {
if (m_ucItems >= m_ucMax)
Grow();
m_pcsContents[m_ucItems++].Copy(lpstrNew);
}
void STRArray::Add(LPCWSTR lpstrNew) {
if (m_ucItems >= m_ucMax)
Grow();
m_pcsContents[m_ucItems++].Copy(lpstrNew);
}
void STRArray::Tokenize(LPCTSTR lpstrIn, TCHAR tcSplitter) {
if (m_pcsContents) {
delete[] m_pcsContents;
m_ucItems = m_ucMax = 0;
m_pcsContents = NULL;
}
if (!lpstrIn || !*lpstrIn)
return;
while (*lpstrIn) {
// First, strip off any leading blanks
while (*lpstrIn && *lpstrIn == _TEXT(' '))
lpstrIn++;
for (LPCTSTR lpstrMoi = lpstrIn;
*lpstrMoi && *lpstrMoi != tcSplitter;
lpstrMoi++)
;
// If we hit the end, just add the whole thing to the array
if (!*lpstrMoi) {
if (*lpstrIn)
Add(lpstrIn);
return;
}
// Otherwise, just add the string up to the splitter
TCHAR szNew[MAX_PATH];
SIZE_T uiLen = (SIZE_T)(lpstrMoi - lpstrIn);
if (uiLen < (sizeof(szNew)/sizeof(szNew[0])) - 1) {
lstrcpyn(szNew,lpstrIn,(UINT)uiLen);
szNew[uiLen] = TCHAR('\0');
Add((LPCTSTR) szNew);
}
lpstrIn = lpstrMoi + 1;
}
}