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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002 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 "file.h"
File::File() {
_handle = NULL;
_readFailed = false;
_encbyte = 0;
}
File::~File() {
close();
}
bool File::open(const char *filename, int mode, byte encbyte) {
char buf[256], *ptr;
if (_handle) {
debug(2, "File %s already opened", filename);
return false;
}
clearReadFailed();
strcpy(buf, filename);
if (mode == 1) {
_handle = fopen(buf, "rb");
if (_handle == NULL) {
ptr = buf;
do
*ptr++ = toupper(*ptr);
while (*ptr);
_handle = fopen(buf, "rb");
}
if (_handle == NULL) {
ptr = buf;
do
*ptr++ = tolower(*ptr);
while (*ptr);
_handle = fopen(buf, "rb");
}
if (_handle == NULL) {
debug(2, "File %s not found", filename);
return false;
}
} else {
warning("Only read mode supported!");
return false;
}
return true;
}
void File::close() {
if (_handle)
fclose(_handle);
_handle = NULL;
}
bool File::isOpen() {
return _handle != NULL;
}
bool File::readFailed() {
return _readFailed != 0;
}
void File::clearReadFailed() {
_readFailed = false;
}
bool File::eof() {
if (_handle == NULL) {
error("File is not open!");
return false;
}
return feof(_handle) != 0;
}
uint32 File::pos() {
if (_handle == NULL) {
error("File is not open!");
return 0;
}
return ftell(_handle);
}
void File::seek(uint32 offs, int whence) {
if (_handle == NULL) {
error("File is not open!");
return;
}
if (fseek(_handle, offs, whence) != 0)
clearerr(_handle);
}
void File::read(void *ptr, uint32 size) {
byte *ptr2 = (byte *)ptr;
if (_handle == NULL) {
error("File is not open!");
return;
}
if (size == 0)
return;
if ((uint32)fread(ptr2, size, 1, _handle) != 1) {
clearerr(_handle);
_readFailed = true;
}
do {
*ptr2++ ^= _encbyte;
} while (--size);
}
byte File::readByte() {
byte b;
if (fread(&b, 1, 1, _handle) != 1) {
clearerr(_handle);
_readFailed = true;
}
return b ^ _encbyte;
}
uint16 File::readWordLE() {
uint16 a = readByte();
uint16 b = readByte();
return a | (b << 8);
}
uint32 File::readDwordLE() {
uint32 a = readWordLE();
uint32 b = readWordLE();
return (b << 16) | a;
}
uint16 File::readWordBE() {
uint16 b = readByte();
uint16 a = readByte();
return a | (b << 8);
}
uint32 File::readDwordBE() {
uint32 b = readWordBE();
uint32 a = readWordBE();
return (b << 16) | a;
}
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