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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2004 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include <ctype.h>
#include "stdafx.h"
#include "palm.h"
#define MAX_BLOCK 64000 // store in memory, before dump to file
// SaveFile class
class PalmSaveFile : public SaveFile {
public:
PalmSaveFile(const char *filename, bool saveOrLoad);
~PalmSaveFile();
bool isOpen() const { return file != NULL; }
uint32 read(void *buf, uint32 size);
uint32 write(const void *buf, uint32 size);
private :
FILE *file;
UInt8 *_readWriteData;
UInt32 _readWritePos;
bool _needDump;
UInt32 length;
};
PalmSaveFile::PalmSaveFile(const char *filename, bool saveOrLoad) {
_readWriteData = NULL;
_readWritePos = 0;
_needDump = false;
file = ::fopen(filename, (saveOrLoad ? "wb" : "rb"));
if (file) {
if (saveOrLoad) {
_readWriteData = (byte *)malloc(MAX_BLOCK);
} else {
// read : cache the whole file
::fseek(file, 0, SEEK_END);
length = ::ftell(file);
::fseek(file, 0, SEEK_SET);
_readWriteData = (byte *)malloc(length);
_readWritePos = 0;
if (_readWriteData)
::fread(_readWriteData, 1, length, file);
}
}
}
PalmSaveFile::~PalmSaveFile() {
if (file) {
if (_needDump)
::fwrite(_readWriteData, _readWritePos, 1, file);
if (_readWriteData)
free(_readWriteData);
::fclose(file);
}
}
uint32 PalmSaveFile::read(void *buf, uint32 size) {
if (!_readWriteData)
// we must return the size, where fread return nitems upon success ( 1 <=> size)
return (::fread(buf, 1, size, file));
if (_readWritePos < length) {
MemMove(buf, _readWriteData + _readWritePos, size);
_readWritePos += size;
return size;
}
return 0;
}
uint32 PalmSaveFile::write(const void *buf, uint32 size) {
if (_readWriteData) {
if ((_readWritePos + size) > MAX_BLOCK) {
if (_readWritePos > 0)
::fwrite(_readWriteData, _readWritePos, 1, file);
_readWritePos = 0;
_needDump = false;
} else {
// save new block
MemMove(_readWriteData + _readWritePos, buf, size);
_readWritePos += size;
_needDump = true;
return size;
}
}
// we must return the size, where fwrite return nitems upon success ( 1 <=> size)
return ::fwrite(buf, 1, size, file);
}
// SaveFileManager class
class PalmSaveFileManager : public SaveFileManager {
public:
SaveFile *openSavefile(const char *filename, bool saveOrLoad);
void listSavefiles(const char *prefix, bool *marks, int num);
protected:
SaveFile *makeSaveFile(const char *filename, bool saveOrLoad);
};
SaveFile *PalmSaveFileManager::openSavefile(const char *filename, bool saveOrLoad) {
char buf[256];
strncpy(buf, getSavePath(), sizeof(buf));
strncat(buf, filename, sizeof(buf));
SaveFile *sf = makeSaveFile(buf, saveOrLoad);
if (!sf->isOpen()) {
delete sf;
sf = NULL;
}
return sf;
}
void PalmSaveFileManager::listSavefiles(const char *prefix, bool *marks, int num) {
FileRef fileRef;
// try to open the dir
Err e = VFSFileOpen(gVars->volRefNum, getSavePath(), vfsModeRead, &fileRef);
memset(marks, false, num*sizeof(bool));
if (e != errNone)
return;
// enumerate all files
UInt32 dirEntryIterator = vfsIteratorStart;
Char filename[32];
FileInfoType info = {0, filename, 32};
UInt16 length = StrLen(prefix);
int slot = 0;
while (dirEntryIterator != vfsIteratorStop) {
e = VFSDirEntryEnumerate (fileRef, &dirEntryIterator, &info);
if (e != expErrEnumerationEmpty) { // there is something
if (StrLen(info.nameP) == (length + 2)) { // consider max 99, filename length is ok
if (StrNCaselessCompare(prefix, info.nameP, length) == 0) { // this seems to be a save file
if (isdigit(info.nameP[length]) && isdigit(info.nameP[length+1])) {
slot = StrAToI(filename + length);
if (slot >= 0 && slot < num)
*(marks+slot) = true;
}
}
}
}
}
VFSFileClose(fileRef);
}
SaveFile *PalmSaveFileManager::makeSaveFile(const char *filename, bool saveOrLoad) {
return new PalmSaveFile(filename, saveOrLoad);
}
// OSystem
SaveFileManager *OSystem_PALMOS::getSavefileManager() {
return new PalmSaveFileManager();
}
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