Initial commit

engines/wintermute/base/base_dynamic_buffer.cpp

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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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This file is based on WME Lite.
+ * http://dead-code.org/redir.php?target=wmelite
+ * Copyright (c) 2011 Jan Nedoma
+ */
+
+#include "engines/wintermute/base/base_engine.h"
+#include "engines/wintermute/base/base_dynamic_buffer.h"
+#include "engines/wintermute/base/base_game.h"
+
+namespace Wintermute {
+
+//////////////////////////////////////////////////////////////////////////
+BaseDynamicBuffer::BaseDynamicBuffer(BaseGame *inGame, uint32 initSize, uint32 growBy) : BaseClass(inGame) {
+	_buffer = nullptr;
+	_size = 0;
+	_realSize = 0;
+
+	_offset = 0;
+	_initSize = initSize;
+	_growBy = growBy;
+
+	_initialized = false;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+BaseDynamicBuffer::~BaseDynamicBuffer() {
+	cleanup();
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void BaseDynamicBuffer::cleanup() {
+	if (_buffer) {
+		free(_buffer);
+	}
+	_buffer = nullptr;
+	_size = 0;
+	_realSize = 0;
+	_offset = 0;
+	_initialized = false;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+uint32 BaseDynamicBuffer::getSize() {
+	return _size;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool BaseDynamicBuffer::init(uint32 initSize) {
+	cleanup();
+
+	if (initSize == 0) {
+		initSize = _initSize;
+	}
+
+	_buffer = (byte *)malloc(initSize);
+	if (!_buffer) {
+		_game->LOG(0, "BaseDynamicBuffer::init - Error allocating %d bytes", initSize);
+		return STATUS_FAILED;
+	}
+
+	_realSize = initSize;
+	_initialized = true;
+
+	return STATUS_OK;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool BaseDynamicBuffer::putBytes(const byte *buffer, uint32 size) {
+	if (!_initialized) {
+		init();
+	}
+
+	while (_offset + size > _realSize) {
+		_realSize += _growBy;
+		_buffer = (byte *)realloc(_buffer, _realSize);
+		if (!_buffer) {
+			_game->LOG(0, "BaseDynamicBuffer::putBytes - Error reallocating buffer to %d bytes", _realSize);
+			return STATUS_FAILED;
+		}
+	}
+
+	memcpy(_buffer + _offset, buffer, size);
+	_offset += size;
+	_size += size;
+
+	return STATUS_OK;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool BaseDynamicBuffer::getBytes(byte *buffer, uint32 size) {
+	if (!_initialized) {
+		init();
+	}
+
+	if (_offset + size > _size) {
+		_game->LOG(0, "BaseDynamicBuffer::getBytes - Buffer underflow");
+		return STATUS_FAILED;
+	}
+
+	memcpy(buffer, _buffer + _offset, size);
+	_offset += size;
+
+	return STATUS_OK;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void BaseDynamicBuffer::putDWORD(uint32 val) {
+	putBytes((byte *)&val, sizeof(uint32));
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+uint32 BaseDynamicBuffer::getDWORD() {
+	uint32 ret = 0;
+	getBytes((byte *)&ret, sizeof(uint32));
+	return ret;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void BaseDynamicBuffer::putString(const char *val) {
+	if (!val) {
+		putString("(null)");
+	} else {
+		putDWORD(strlen(val) + 1);
+		putBytes((const byte *)val, strlen(val) + 1);
+	}
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+char *BaseDynamicBuffer::getString() {
+	uint32 len = getDWORD();
+	char *ret = (char *)(_buffer + _offset);
+	_offset += len;
+
+	if (!strcmp(ret, "(null)")) {
+		return nullptr;
+	} else {
+		return ret;
+	}
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void BaseDynamicBuffer::putText(const char *fmt, ...) {
+	va_list va;
+
+	va_start(va, fmt);
+	putTextForm(fmt, va);
+	va_end(va);
+
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void BaseDynamicBuffer::putTextIndent(int indent, const char *fmt, ...) {
+	va_list va;
+
+	putText("%*s", indent, "");
+
+	va_start(va, fmt);
+	putTextForm(fmt, va);
+	va_end(va);
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void BaseDynamicBuffer::putTextForm(const char *format, va_list argptr) {
+	char buff[32768];
+	Common::vsprintf_s(buff, format, argptr);
+	putBytes((byte *)buff, strlen(buff));
+}
+
+} // End of namespace Wintermute