Implemented temp buffer saving/loading ("SAVE.TMP") in Woodruff.

Objects you take from or leave in screens are remembered correctly now.

svn-id: r32030

5 files changed, 212 insertions, 2 deletions

diff --git a/engines/gob/saveload.cpp b/engines/gob/saveload.cpp
index e0854151a0..50f41db47e 100644
--- a/engines/gob/saveload.cpp
+++ b/engines/gob/saveload.cpp
@@ -433,6 +433,115 @@ bool StagedSave::read() {
 }
 
 
+PagedBuffer::PagedBuffer(uint32 pageSize) {
+
+	_size = 0;
+	_pageSize = pageSize;
+}
+
+PagedBuffer::~PagedBuffer() {
+	clear();
+}
+
+bool PagedBuffer::empty() const {
+	return _pages.empty();
+}
+
+uint32 PagedBuffer::getSize() const {
+	return _size;
+}
+
+void PagedBuffer::clear() {
+	for (uint i = 0; i < _pages.size(); i++)
+		delete[] _pages[i];
+	_pages.clear();
+	_size = 0;
+}
+
+bool PagedBuffer::write(const byte *buffer, uint32 size, uint32 offset) {
+	grow(size, offset);
+
+	uint page = offset / _pageSize;
+	while (size > 0) {
+		if (!_pages[page])
+			_pages[page] = new byte[_pageSize];
+
+		uint32 pStart = offset % _pageSize;
+		uint32 n = MIN(size, _pageSize - pStart);
+
+		memcpy(_pages[page] + pStart, buffer, n);
+
+		buffer += n;
+		offset += n;
+		size -= n;
+		page++;
+	}
+
+	return true;
+}
+
+bool PagedBuffer::read(byte *buffer, uint32 size, uint32 offset) const {
+	uint page = offset / _pageSize;
+
+	while (size > 0) {
+		if (offset >= _size) {
+			memset(buffer, 0, size);
+			break;
+		}
+
+		uint32 pStart = offset % _pageSize;
+		uint32 n = MIN(MIN(size, _pageSize - pStart), _size - offset);
+
+		if (_pages[page])
+			memcpy(buffer, _pages[page] + pStart, n);
+		else
+			memset(buffer, 0, n);
+
+		buffer += n;
+		offset += n;
+		size -= n;
+		page++;
+	}
+
+	return true;
+}
+
+uint32 PagedBuffer::writeToStream(Common::WriteStream &out) const {
+	for (uint i = 0; i < _pages.size(); i++) {
+		if (!_pages[i]) {
+			for (uint32 j = 0; j < _pageSize; j++)
+				out.writeByte(0);
+		} else
+			out.write(_pages[i], _pageSize);
+	}
+
+	return _size;
+}
+
+uint32 PagedBuffer::readFromStream(Common::ReadStream &in) {
+	clear();
+
+	while (!in.eos()) {
+		byte *buffer = new byte[_pageSize];
+
+		_size += in.read(buffer, _pageSize);
+
+		_pages.push_back(buffer);
+	}
+
+	return _size;
+}
+
+void PagedBuffer::grow(uint32 size, uint32 offset) {
+	uint32 eSize = offset + size;
+
+	while (_size < eSize) {
+		_pages.push_back(0);
+		_size += MIN(_pageSize, eSize - _size);
+	}
+}
+
+
 SaveLoad::SaveLoad(GobEngine *vm, const char *targetName) : _vm(vm) {
 
 	_targetName = new char[strlen(targetName) + 1];
diff --git a/engines/gob/saveload.h b/engines/gob/saveload.h
index 9b032cc73f..d13bd2c15f 100644
--- a/engines/gob/saveload.h
+++ b/engines/gob/saveload.h
@@ -121,6 +121,30 @@ private:
 	bool read();
 };
 
+class PagedBuffer {
+public:
+	PagedBuffer(uint32 pageSize = 1024);
+	~PagedBuffer();
+
+	bool empty() const;
+	uint32 getSize() const;
+
+	void clear();
+
+	bool write(const byte *buffer, uint32 size, uint32 offset);
+	bool read(byte *buffer, uint32 size, uint32 offset) const;
+
+	uint32 writeToStream(Common::WriteStream &out) const;
+	uint32 readFromStream(Common::ReadStream &in);
+
+private:
+	uint32 _size;
+	uint32 _pageSize;
+	Common::Array<byte *> _pages;
+
+	void grow(uint32 size, uint32 offset);
+};
+
 class SaveLoad {
 public:
 	enum SaveMode {
@@ -310,7 +334,8 @@ protected:
 class SaveLoad_v4 : public SaveLoad {
 public:
 	enum SaveType {
-		kSaveNone
+		kSaveNone,
+		kSaveTempBuffer
 	};
 
 	SaveLoad_v4(GobEngine *vm, const char *targetName);
@@ -330,12 +355,20 @@ protected:
 
 	int32 _varSize;
 
+	PagedBuffer _tmpBuffer;
+
 	virtual int getSaveType(const char *fileName);
 
 	virtual int32 getSizeVersioned(int type);
 	virtual bool loadVersioned(int type, int16 dataVar, int32 size, int32 offset);
 	virtual bool saveVersioned(int type, int16 dataVar, int32 size, int32 offset);
 
+	int32 getSizeTempBuffer(SaveFile &saveFile);
+
+	bool loadTempBuffer(SaveFile &saveFile, int16 dataVar, int32 size, int32 offset);
+
+	bool saveTempBuffer(SaveFile &saveFile, int16 dataVar, int32 size, int32 offset);
+
 	void assertInited();
 };
 
diff --git a/engines/gob/saveload_v2.cpp b/engines/gob/saveload_v2.cpp
index 2754646198..153b6dc2cd 100644
--- a/engines/gob/saveload_v2.cpp
+++ b/engines/gob/saveload_v2.cpp
@@ -62,6 +62,8 @@ SaveLoad_v2::~SaveLoad_v2() {
 }
 
 SaveLoad::SaveMode SaveLoad_v2::getSaveMode(const char *fileName) {
+	fileName = stripPath(fileName);
+
 	for (int i = 0; i < ARRAYSIZE(_saveFiles); i++)
 		if (!scumm_stricmp(fileName, _saveFiles[i].sourceName))
 			return _saveFiles[i].mode;
diff --git a/engines/gob/saveload_v3.cpp b/engines/gob/saveload_v3.cpp
index ae8d160eb2..d8eadd5677 100644
--- a/engines/gob/saveload_v3.cpp
+++ b/engines/gob/saveload_v3.cpp
@@ -75,6 +75,8 @@ SaveLoad_v3::~SaveLoad_v3() {
 }
 
 SaveLoad::SaveMode SaveLoad_v3::getSaveMode(const char *fileName) {
+	fileName = stripPath(fileName);
+
 	for (int i = 0; i < ARRAYSIZE(_saveFiles); i++)
 		if (!scumm_stricmp(fileName, _saveFiles[i].sourceName))
 			return _saveFiles[i].mode;
diff --git a/engines/gob/saveload_v4.cpp b/engines/gob/saveload_v4.cpp
index 2235b4834e..75e44cc1bc 100644
--- a/engines/gob/saveload_v4.cpp
+++ b/engines/gob/saveload_v4.cpp
@@ -27,12 +27,13 @@
 
 #include "gob/gob.h"
 #include "gob/saveload.h"
+#include "gob/global.h"
 #include "gob/game.h"
 
 namespace Gob {
 
 SaveLoad_v4::SaveFile SaveLoad_v4::_saveFiles[] = {
-	{ "", 0, kSaveModeNone, kSaveNone }
+	{ "save.tmp", 0, kSaveModeSave, kSaveTempBuffer }
 };
 
 SaveLoad_v4::SaveLoad_v4(GobEngine *vm, const char *targetName) :
@@ -45,31 +46,94 @@ SaveLoad_v4::~SaveLoad_v4() {
 }
 
 SaveLoad::SaveMode SaveLoad_v4::getSaveMode(const char *fileName) {
+	fileName = stripPath(fileName);
+
+	for (int i = 0; i < ARRAYSIZE(_saveFiles); i++)
+		if (!scumm_stricmp(fileName, _saveFiles[i].sourceName))
+			return _saveFiles[i].mode;
+
 	return kSaveModeNone;
 }
 
 int SaveLoad_v4::getSaveType(const char *fileName) {
+	for (int i = 0; i < ARRAYSIZE(_saveFiles); i++)
+		if (!scumm_stricmp(fileName, _saveFiles[i].sourceName))
+			return i;
+
 	return -1;
 }
 
 int32 SaveLoad_v4::getSizeVersioned(int type) {
 	assertInited();
 
+	switch (_saveFiles[type].type) {
+	case kSaveTempBuffer:
+		return getSizeTempBuffer(_saveFiles[type]);
+	default:
+		break;
+	}
+
 	return -1;
 }
 
 bool SaveLoad_v4::loadVersioned(int type, int16 dataVar, int32 size, int32 offset) {
 	assertInited();
 
+	switch (_saveFiles[type].type) {
+	case kSaveTempBuffer:
+		if (loadTempBuffer(_saveFiles[type], dataVar, size, offset))
+			return true;
+
+		warning("While loading from the tempBuffer");
+		break;
+
+	default:
+		break;
+	}
+
 	return false;
 }
 
 bool SaveLoad_v4::saveVersioned(int type, int16 dataVar, int32 size, int32 offset) {
 	assertInited();
 
+	switch (_saveFiles[type].type) {
+	case kSaveTempBuffer:
+		if (saveTempBuffer(_saveFiles[type], dataVar, size, offset))
+			return true;
+
+		warning("While saving to the tempBuffer");
+		break;
+
+	default:
+		break;
+	}
+
 	return false;
 }
 
+int32 SaveLoad_v4::getSizeTempBuffer(SaveFile &saveFile) {
+	return _tmpBuffer.getSize();
+}
+
+bool SaveLoad_v4::loadTempBuffer(SaveFile &saveFile,
+		int16 dataVar, int32 size, int32 offset) {
+
+	debugC(3, kDebugSaveLoad, "Loading from the temporary buffer (%d, %d, %d)",
+			dataVar, size, offset);
+
+	return _tmpBuffer.read(_vm->_global->_inter_variables + dataVar, size, offset);
+}
+
+bool SaveLoad_v4::saveTempBuffer(SaveFile &saveFile,
+		int16 dataVar, int32 size, int32 offset) {
+
+	debugC(3, kDebugSaveLoad, "Saving to the temporary buffer (%d, %d, %d)",
+			dataVar, size, offset);
+
+	return _tmpBuffer.write(_vm->_global->_inter_variables + dataVar, size, offset);
+}
+
 void SaveLoad_v4::assertInited() {
 	if (_varSize > 0)
 		return;