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