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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.
*
*/
#ifndef __CREATE_ACCESS_DAT_H__
#define __CREATE_ACCESS_DAT_H__
#include <stdio.h>
#include <stdlib.h>
#include "common/scummsys.h"
#include "common/endian.h"
#include "common/array.h"
#define VERSION_NUMBER 1
enum AccessMode {
kFileReadMode = 1,
kFileWriteMode = 2
};
class File {
private:
FILE *_f;
const byte *_memPtr;
size_t _offset, _size;
public:
File() : _f(nullptr), _memPtr(nullptr), _offset(0), _size(0) {}
bool open(const char *filename, AccessMode mode = kFileReadMode) {
_memPtr = nullptr;
_f = fopen(filename, (mode == kFileReadMode) ? "rb" : "wb+");
return (_f != NULL);
}
bool open(const byte *data, uint size_) {
close();
_memPtr = data;
_size = size_;
return true;
}
void close() {
if (_f)
fclose(_f);
_f = nullptr;
_memPtr = nullptr;
}
int seek(int32 offset, int whence = SEEK_SET) {
if (_f)
return fseek(_f, offset, whence);
switch (whence) {
case SEEK_SET:
_offset = offset;
break;
case SEEK_CUR:
_offset += offset;
break;
case SEEK_END:
_offset = _size + offset;
break;
default:
break;
}
return _offset;
}
void skip(int32 offset) {
if (_f)
fseek(_f, offset, SEEK_CUR);
else
_offset += offset;
}
long read(void *buffer, size_t len) {
if (_f)
return fread(buffer, 1, len, _f);
uint bytesToRead = CLIP(len, (size_t)0, _size - _offset);
memcpy(buffer, &_memPtr[_offset], bytesToRead);
_offset += bytesToRead;
return bytesToRead;
}
void write(const void *buffer, size_t len) {
assert(_f);
fwrite(buffer, 1, len, _f);
}
void write(File &src, size_t len) {
for (size_t idx = 0; idx < len; ++idx)
writeByte(src.readByte());
}
byte readByte() {
byte v;
read(&v, sizeof(byte));
return v;
}
uint16 readWord() {
uint16 v;
read(&v, sizeof(uint16));
return FROM_LE_16(v);
}
uint32 readLong() {
uint32 v;
read(&v, sizeof(uint32));
return FROM_LE_32(v);
}
void writeByte(byte v) {
write(&v, sizeof(byte));
}
void writeByte(byte v, int len) {
byte *b = new byte[len];
memset(b, v, len);
write(b, len);
delete[] b;
}
void writeWord(uint16 v) {
uint16 vTemp = TO_LE_16(v);
write(&vTemp, sizeof(uint16));
}
void writeLong(uint32 v) {
uint32 vTemp = TO_LE_32(v);
write(&vTemp, sizeof(uint32));
}
void writeString(const char *msg) {
if (!msg) {
writeByte(0);
} else {
do {
writeByte(*msg);
} while (*msg++);
}
}
void writeString(File &src) {
char c;
do {
c = src.readByte();
writeByte(c);
} while (c);
}
uint32 pos() const {
if (_f)
return ftell(_f);
else
return _offset;
}
uint32 size() const {
if (_f) {
uint32 currentPos = pos();
fseek(_f, 0, SEEK_END);
uint32 result = pos();
fseek(_f, currentPos, SEEK_SET);
return result;
} else if (_memPtr) {
return _size;
} else {
return 0;
}
}
bool eof() const {
if (_f)
return feof(_f) != 0;
else if (_memPtr)
return _offset >= _size;
return false;
}
};
#endif
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