144 lines
3.5 KiB
C++
144 lines
3.5 KiB
C++
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Copyright (C) 1996-1998, Microsoft Corporation.
|
||
|
|
//
|
||
|
|
// File: string.hxx
|
||
|
|
//
|
||
|
|
// Contents: Yet another string class
|
||
|
|
//
|
||
|
|
// History: 96/Jan/3 DwightKr Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <ci64.hxx>
|
||
|
|
|
||
|
|
|
||
|
|
//+---------------------------------------------------------------------------
|
||
|
|
//
|
||
|
|
// Class: CVirtualString
|
||
|
|
//
|
||
|
|
// Purpose: Maintains a WCHAR string buffer as a virtual allocation
|
||
|
|
// and grows & commits it as necessary. This class should
|
||
|
|
// be used whenever you need a string buffer which will be
|
||
|
|
// slowly grow by appending new strings to it ... such as with
|
||
|
|
// the construction of query results in a HTML page.
|
||
|
|
//
|
||
|
|
// History: 96/Jan/23 DwightKr Created
|
||
|
|
//
|
||
|
|
//----------------------------------------------------------------------------
|
||
|
|
class CVirtualString
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
CVirtualString( unsigned cwcBuffer = 2048 );
|
||
|
|
|
||
|
|
~CVirtualString();
|
||
|
|
|
||
|
|
WCHAR const * Get() const
|
||
|
|
{
|
||
|
|
Win4Assert( _wcsEnd <= _pwcLastCommitted );
|
||
|
|
|
||
|
|
*_wcsEnd = 0;
|
||
|
|
return _wcsString;
|
||
|
|
}
|
||
|
|
|
||
|
|
WCHAR * GetPointer() const
|
||
|
|
{
|
||
|
|
Win4Assert( _wcsEnd <= _pwcLastCommitted );
|
||
|
|
|
||
|
|
*_wcsEnd = 0;
|
||
|
|
return _wcsString;
|
||
|
|
}
|
||
|
|
|
||
|
|
void StrCat( WCHAR const * wcsString )
|
||
|
|
{
|
||
|
|
StrCat( wcsString, wcslen( wcsString ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
void StrCat( WCHAR const * wcsString, ULONG cwcValue )
|
||
|
|
{
|
||
|
|
Win4Assert( ( 0 != wcsString ) || ( 0 == cwcValue ) );
|
||
|
|
|
||
|
|
if ( ( _wcsEnd + cwcValue ) >= _pwcLastCommitted )
|
||
|
|
GrowBuffer( cwcValue + 1 );
|
||
|
|
|
||
|
|
RtlCopyMemory( _wcsEnd, wcsString, cwcValue * sizeof WCHAR );
|
||
|
|
|
||
|
|
_wcsEnd += cwcValue;
|
||
|
|
|
||
|
|
Win4Assert( (_wcsEnd - _wcsString) < (int) _cwcBuffer );
|
||
|
|
}
|
||
|
|
|
||
|
|
void CharCat( WCHAR wcChar )
|
||
|
|
{
|
||
|
|
Win4Assert( 0 != wcChar );
|
||
|
|
Win4Assert( _wcsEnd <= _pwcLastCommitted );
|
||
|
|
|
||
|
|
if ( _wcsEnd != _pwcLastCommitted )
|
||
|
|
{
|
||
|
|
// duplicate the assignment to avoid a branch
|
||
|
|
|
||
|
|
*_wcsEnd++ = wcChar;
|
||
|
|
|
||
|
|
Win4Assert( (_wcsEnd - _wcsString) < (int) _cwcBuffer );
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
GrowBuffer( 1 );
|
||
|
|
|
||
|
|
*_wcsEnd++ = wcChar;
|
||
|
|
|
||
|
|
Win4Assert( (_wcsEnd - _wcsString) < (int) _cwcBuffer );
|
||
|
|
}
|
||
|
|
|
||
|
|
WCHAR * StrDup() const
|
||
|
|
{
|
||
|
|
WCHAR * wcsString = new WCHAR[ StrLen() + 1 ];
|
||
|
|
|
||
|
|
RtlCopyMemory( wcsString,
|
||
|
|
_wcsString,
|
||
|
|
StrLen() * sizeof(WCHAR) );
|
||
|
|
|
||
|
|
wcsString[ StrLen() ] = 0;
|
||
|
|
|
||
|
|
return wcsString;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned StrLen() const
|
||
|
|
{
|
||
|
|
return CiPtrToUint( _wcsEnd - _wcsString );
|
||
|
|
}
|
||
|
|
|
||
|
|
void Empty()
|
||
|
|
{
|
||
|
|
Win4Assert( 0 != _wcsString );
|
||
|
|
Win4Assert( _wcsEnd <= _pwcLastCommitted );
|
||
|
|
|
||
|
|
_wcsEnd = _wcsString;
|
||
|
|
*_wcsEnd = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
void GrowBuffer( ULONG cwcToGrow );
|
||
|
|
|
||
|
|
WCHAR * _wcsString; // Start of the string
|
||
|
|
WCHAR * _wcsEnd; // Next place to strcat new data
|
||
|
|
WCHAR * _pwcLastCommitted; // Pointer to last committed WCHAR
|
||
|
|
|
||
|
|
unsigned _cwcBuffer; // Total size of virtual alloc'ed memory
|
||
|
|
};
|
||
|
|
|
||
|
|
void URLEscapeW( WCHAR const * wcsString,
|
||
|
|
CVirtualString & StrResult,
|
||
|
|
ULONG ulCodepage,
|
||
|
|
BOOL fConvertSpaceToPlus = FALSE );
|
||
|
|
|
||
|
|
void URLEscapeMToW( BYTE const * psz,
|
||
|
|
unsigned cc,
|
||
|
|
CVirtualString & StrResult,
|
||
|
|
BOOL fConvertSpaceToPlus = FALSE );
|
||
|
|
|