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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2005 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 "common/file.h"
#include "common/util.h"
Common::StringList File::_defaultDirectories;
static FILE *fopenNoCase(const char *filename, const char *directory, const char *mode) {
FILE *file;
char buf[512];
char *ptr;
assert(directory);
strcpy(buf, directory);
#if !defined(__GP32__) && !defined(__PALM_OS__)
// Add a trailing slash, if necessary.
if (buf[0] != 0) {
const int dirLen = strlen(buf);
if (buf[dirLen-1] != ':' && buf[dirLen-1] != '/' && buf[dirLen-1] != '\\')
strcat(buf, "/");
}
#endif
// Append the filename to the path string
const int offsetToFileName = strlen(buf);
strcat(buf, filename);
//
// Try to open the file normally
//
file = fopen(buf, mode);
//
// Try again, with file name converted to upper case
//
if (!file) {
ptr = buf + offsetToFileName;
while (*ptr) {
*ptr = toupper(*ptr);
ptr++;
}
file = fopen(buf, mode);
}
//
// Try again, with file name converted to lower case
//
if (!file) {
ptr = buf + offsetToFileName;
while (*ptr) {
*ptr = tolower(*ptr);
ptr++;
}
file = fopen(buf, mode);
}
//
// Try again, with file name capitalized
//
if (!file) {
ptr = buf + offsetToFileName;
*ptr = toupper(*ptr);
file = fopen(buf, mode);
}
#ifdef __amigaos4__
//
// Work around for possibility that someone uses AmigaOS "newlib" build with SmartFileSystem (blocksize 512 bytes), leading
// to buffer size being only 512 bytes. "Clib2" sets the buffer size to 8KB, resulting smooth movie playback. This forces the buffer
// to be enough also when using "newlib" compile on SFS.
//
if (file) {
setvbuf(file, NULL, _IOFBF, 8192);
}
#endif
return file;
}
void File::addDefaultDirectory(const Common::String &directory) {
_defaultDirectories.push_back(directory);
}
void File::resetDefaultDirectories() {
_defaultDirectories.clear();
}
File::File()
: _handle(0), _ioFailed(false), _refcount(1) {
}
//#define DEBUG_FILE_REFCOUNT
File::~File() {
#ifdef DEBUG_FILE_REFCOUNT
warning("File::~File on file '%s'", _name.c_str());
#endif
close();
}
void File::incRef() {
#ifdef DEBUG_FILE_REFCOUNT
warning("File::incRef on file '%s'", _name.c_str());
#endif
_refcount++;
}
void File::decRef() {
#ifdef DEBUG_FILE_REFCOUNT
warning("File::decRef on file '%s'", _name.c_str());
#endif
if (--_refcount == 0) {
delete this;
}
}
bool File::open(const char *filename, AccessMode mode, const char *directory) {
assert(mode == kFileReadMode || mode == kFileWriteMode);
if (_handle) {
error("File::open: This file object already is opened (%s), won't open '%s'", _name.c_str(), filename);
}
if (filename == NULL || *filename == 0) {
error("File::open: No filename was specified!");
}
clearIOFailed();
const char *modeStr = (mode == kFileReadMode) ? "rb" : "wb";
if (mode == kFileWriteMode || directory) {
_handle = fopenNoCase(filename, directory ? directory : "", modeStr);
} else {
Common::StringList::const_iterator x;
// Try all default directories
for (x = _defaultDirectories.begin(); _handle == NULL && x != _defaultDirectories.end(); ++x) {
_handle = fopenNoCase(filename, x->c_str(), modeStr);
}
// Last resort: try the current directory
if (_handle == NULL)
_handle = fopenNoCase(filename, "", modeStr);
}
if (_handle == NULL) {
if (mode == kFileReadMode)
debug(2, "File %s not found", filename);
else
debug(2, "File %s not opened", filename);
return false;
}
_name = filename;
#ifdef DEBUG_FILE_REFCOUNT
warning("File::open on file '%s'", _name.c_str());
#endif
return true;
}
bool File::exists(const char *filename, const char *directory) {
// FIXME: Ugly ugly hack!
File tmp;
return tmp.open(filename, kFileReadMode, directory);
}
void File::close() {
if (_handle)
fclose(_handle);
_handle = NULL;
}
bool File::isOpen() const {
return _handle != NULL;
}
bool File::ioFailed() const {
return _ioFailed != 0;
}
void File::clearIOFailed() {
_ioFailed = false;
}
bool File::eof() const {
if (_handle == NULL) {
error("File::eof: File is not open!");
return false;
}
return feof(_handle) != 0;
}
uint32 File::pos() const {
if (_handle == NULL) {
error("File::pos: File is not open!");
return 0;
}
return ftell(_handle);
}
uint32 File::size() const {
if (_handle == NULL) {
error("File::size: File is not open!");
return 0;
}
uint32 oldPos = ftell(_handle);
fseek(_handle, 0, SEEK_END);
uint32 length = ftell(_handle);
fseek(_handle, oldPos, SEEK_SET);
return length;
}
void File::seek(int32 offs, int whence) {
if (_handle == NULL) {
error("File::seek: File is not open!");
return;
}
if (fseek(_handle, offs, whence) != 0)
clearerr(_handle);
}
uint32 File::read(void *ptr, uint32 len) {
byte *ptr2 = (byte *)ptr;
uint32 real_len;
if (_handle == NULL) {
error("File::read: File is not open!");
return 0;
}
if (len == 0)
return 0;
real_len = fread(ptr2, 1, len, _handle);
if (real_len < len) {
_ioFailed = true;
}
return real_len;
}
uint32 File::write(const void *ptr, uint32 len) {
if (_handle == NULL) {
error("File::write: File is not open!");
return 0;
}
if (len == 0)
return 0;
if ((uint32)fwrite(ptr, 1, len, _handle) != len) {
_ioFailed = true;
}
return len;
}
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