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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/*
* This file is based on WME Lite.
* http://dead-code.org/redir.php?target=wmelite
* Copyright (c) 2011 Jan Nedoma
*/
#include "engines/wintermute/Base/BGame.h"
#include "engines/wintermute/Base/BDynBuffer.h"
namespace WinterMute {
//////////////////////////////////////////////////////////////////////////
CBDynBuffer::CBDynBuffer(CBGame *inGame, uint32 InitSize, uint32 GrowBy): CBBase(inGame) {
_buffer = NULL;
_size = 0;
_realSize = 0;
_offset = 0;
_initSize = InitSize;
_growBy = GrowBy;
_initialized = false;
}
//////////////////////////////////////////////////////////////////////////
CBDynBuffer::~CBDynBuffer() {
Cleanup();
}
//////////////////////////////////////////////////////////////////////////
void CBDynBuffer::Cleanup() {
if (_buffer) free(_buffer);
_buffer = NULL;
_size = 0;
_realSize = 0;
_offset = 0;
_initialized = false;
}
//////////////////////////////////////////////////////////////////////////
uint32 CBDynBuffer::GetSize() {
return _size;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBDynBuffer::Init(uint32 InitSize) {
Cleanup();
if (InitSize == 0) InitSize = _initSize;
_buffer = (byte *)malloc(InitSize);
if (!_buffer) {
Game->LOG(0, "CBDynBuffer::Init - Error allocating %d bytes", InitSize);
return E_FAIL;
}
_realSize = InitSize;
_initialized = true;
return S_OK;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBDynBuffer::PutBytes(byte *Buffer, uint32 Size) {
if (!_initialized) Init();
while (_offset + Size > _realSize) {
_realSize += _growBy;
_buffer = (byte *)realloc(_buffer, _realSize);
if (!_buffer) {
Game->LOG(0, "CBDynBuffer::PutBytes - Error reallocating buffer to %d bytes", _realSize);
return E_FAIL;
}
}
memcpy(_buffer + _offset, Buffer, Size);
_offset += Size;
_size += Size;
return S_OK;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBDynBuffer::GetBytes(byte *Buffer, uint32 Size) {
if (!_initialized) Init();
if (_offset + Size > _size) {
Game->LOG(0, "CBDynBuffer::GetBytes - Buffer underflow");
return E_FAIL;
}
memcpy(Buffer, _buffer + _offset, Size);
_offset += Size;
return S_OK;
}
//////////////////////////////////////////////////////////////////////////
void CBDynBuffer::PutDWORD(uint32 Val) {
PutBytes((byte *)&Val, sizeof(uint32));
}
//////////////////////////////////////////////////////////////////////////
uint32 CBDynBuffer::GetDWORD() {
uint32 ret;
GetBytes((byte *)&ret, sizeof(uint32));
return ret;
}
//////////////////////////////////////////////////////////////////////////
void CBDynBuffer::PutString(const char *Val) {
if (!Val) PutString("(null)");
else {
PutDWORD(strlen(Val) + 1);
PutBytes((byte *)Val, strlen(Val) + 1);
}
}
//////////////////////////////////////////////////////////////////////////
char *CBDynBuffer::GetString() {
uint32 len = GetDWORD();
char *ret = (char *)(_buffer + _offset);
_offset += len;
if (!strcmp(ret, "(null)")) return NULL;
else return ret;
}
//////////////////////////////////////////////////////////////////////////
void CBDynBuffer::PutText(LPCSTR fmt, ...) {
va_list va;
va_start(va, fmt);
PutTextForm(fmt, va);
va_end(va);
}
//////////////////////////////////////////////////////////////////////////
void CBDynBuffer::PutTextIndent(int Indent, LPCSTR fmt, ...) {
va_list va;
PutText("%*s", Indent, "");
va_start(va, fmt);
PutTextForm(fmt, va);
va_end(va);
}
//////////////////////////////////////////////////////////////////////////
void CBDynBuffer::PutTextForm(const char *format, va_list argptr) {
char buff[32768];
vsprintf(buff, format, argptr);
PutBytes((byte *)buff, strlen(buff));
}
} // end of namespace WinterMute
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