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/* ScummVM - Scumm Interpreter
* Copyright (C) 2002-2004 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 "common/file.h"
#include "common/util.h"
Common::StringList File::_defaultDirectories;
FILE *File::fopenNoCase(const char *filename, const char *directory, const char *mode) {
FILE *file;
char buf[512];
char *ptr;
assert(directory);
strcpy(buf, directory);
#ifdef WIN32
// Fix for Win98 issue related with game directory pointing to root drive ex. "c:\"
if ((buf[0] != 0) && (buf[1] == ':') && (buf[2] == '\\') && (buf[3] == 0)) {
buf[2] = 0;
}
#endif
#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] != '/')
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);
}
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), _name(0) {
}
//#define DEBUG_FILE_REFCOUNT
File::~File() {
#ifdef DEBUG_FILE_REFCOUNT
warning("File::~File on file '%s'", _name);
#endif
close();
delete [] _name;
}
void File::incRef() {
#ifdef DEBUG_FILE_REFCOUNT
warning("File::incRef on file '%s'", _name);
#endif
_refcount++;
}
void File::decRef() {
#ifdef DEBUG_FILE_REFCOUNT
warning("File::decRef on file '%s'", _name);
#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, filename);
}
if (filename == NULL || *filename == 0) {
error("File::open: No filename was specified!");
}
clearIOFailed();
const char *modeStr = (mode == kFileReadMode) ? "rb" : "wb";
if (directory) {
_handle = fopenNoCase(filename, 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;
}
int len = strlen(filename);
if (_name != 0)
delete [] _name;
_name = new char[len+1];
memcpy(_name, filename, len+1);
#ifdef DEBUG_FILE_REFCOUNT
warning("File::open on file '%s'", _name);
#endif
return true;
}
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() {
if (_handle == NULL) {
error("File::eof: File is not open!");
return false;
}
return feof(_handle) != 0;
}
uint32 File::pos() {
if (_handle == NULL) {
error("File::pos: File is not open!");
return 0;
}
return ftell(_handle);
}
uint32 File::size() {
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;
}
#define LF 0x0A
#define CR 0x0D
char *File::gets(void *ptr, uint32 len) {
char *ptr2 = (char *)ptr;
char *res = ptr2;
uint32 read_chars = 1;
if (_handle == NULL) {
error("File::gets: File is not open!");
return 0;
}
if (len == 0 || !ptr)
return NULL;
// We don't include the newline character(s) in the buffer, and we
// always terminate it - we never read more than len-1 characters.
// EOF is treated as a line break, unless it was the first character
// that was read.
// 0 is treated as a line break, even though it should never occur in
// a text file.
// DOS and Windows use CRLF line breaks
// Unix and OS X use LF line breaks
// Macintosh before OS X uses CR line breaks
bool first = true;
while (read_chars < len) {
int c = getc(_handle);
if (c == EOF) {
if (first)
return NULL;
break;
}
first = false;
if (c == 0)
break;
if (c == LF)
break;
if (c == CR) {
c = getc(_handle);
if (c != LF)
ungetc(c, _handle);
break;
}
*ptr2++ = (char) c;
read_chars++;
}
*ptr2 = 0;
return res;
}
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