cog/Plugins/FileSource/FileSource.m

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//
// FileSource.m
// FileSource
//
// Created by Vincent Spader on 3/1/07.
// Copyright 2007 __MyCompanyName__. All rights reserved.
//
#import "FileSource.h"
@implementation FileSource
+ (void)initialize
{
fex_init();
}
- (id)init
{
self = [super init];
if ( self ) {
fex = NULL;
_fd = NULL;
}
return self;
}
- (BOOL)open:(NSURL *)url
{
[self setURL:url];
NSString * path = [url path];
fex_type_t type;
fex_err_t error = fex_identify_file( &type, [path UTF8String] );
if ( !error && type && strcmp( fex_type_name( type ), "file" ) ) {
error = fex_open_type( &fex, [path UTF8String], type );
if ( !error ) {
while ( !fex_done( fex ) ) {
NSString * name = [[NSString stringWithUTF8String:fex_name( fex )] lowercaseString];
if ( [name hasSuffix:@".diz"] || [name hasSuffix:@".txt"] || [name hasSuffix:@".nfo"] ) {
error = fex_next( fex );
if ( error )
return NO;
continue;
}
break;
}
if ( fex_done( fex ) )
return NO;
error = fex_data( fex, &data );
if ( error )
return NO;
size = fex_size( fex );
offset = 0;
return YES;
}
else return NO;
}
_fd = fopen([[url path] UTF8String], "r");
return (_fd != NULL);
}
- (BOOL)seekable
{
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return YES;
}
- (BOOL)seek:(long)position whence:(int)whence
{
if ( fex ) {
switch ( whence ) {
case SEEK_CUR:
position += offset;
break;
case SEEK_END:
position += size;
break;
}
offset = position;
return (position >= 0) && (position < size);
}
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if ( _fd == NULL ) {
offset = 0;
size = 0;
return NO;
}
return (fseek(_fd, position, whence) == 0);
}
- (long)tell
{
if ( fex ) return offset;
else return ftell(_fd);
}
- (long)read:(void *)buffer amount:(long)amount
{
if ( fex ) {
if ( amount + offset > size )
amount = size - offset;
memcpy( buffer, (const char *)data + offset, amount );
offset += amount;
return amount;
}
else {
return fread(buffer, 1, amount, _fd);
}
}
- (void)close
{
if (_fd)
{
fclose(_fd);
_fd = NULL;
}
if ( fex ) {
fex_close( fex );
fex = NULL;
}
}
- (NSURL *)url
{
return _url;
}
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- (NSString *)mimeType
{
return nil;
}
- (void)setURL:(NSURL *)url
{
_url = url;
}
+ (NSArray *)schemes
{
return [NSArray arrayWithObject:@"file"];
}
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- (void)dealloc {
[self close];
[self setURL:nil];
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}
@end