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109 lines
3.3 KiB
Plaintext
109 lines
3.3 KiB
Plaintext
//
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// CSROMFetcher.m
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// Clock Signal
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//
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// Created by Thomas Harte on 01/01/2018.
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// Copyright 2018 Thomas Harte. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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#include "CSROMFetcher.hpp"
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#import "NSBundle+DataResource.h"
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#import "NSData+StdVector.h"
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#import "NSData+CRC32.h"
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#include <string>
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namespace {
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NSString *directoryFor(const ROM::Description &description) {
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return [@"ROMImages/" stringByAppendingString:[NSString stringWithUTF8String:description.machine_name.c_str()]];
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}
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NSArray<NSURL *> *urlsFor(const ROM::Description &description, const std::string &file_name) {
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NSMutableArray<NSURL *> *const urls = [[NSMutableArray alloc] init];
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NSArray<NSURL *> *const supportURLs = [[NSFileManager defaultManager] URLsForDirectory:NSApplicationSupportDirectory inDomains:NSUserDomainMask];
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NSString *const subdirectory = directoryFor(description);
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for(NSURL *supportURL in supportURLs) {
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[urls addObject:[[supportURL URLByAppendingPathComponent:subdirectory]
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URLByAppendingPathComponent:[NSString stringWithUTF8String:file_name.c_str()]]];
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}
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return urls;
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}
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}
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BOOL CSInstallROM(NSURL *url) {
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NSData *const data = [NSData dataWithContentsOfURL:url];
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if(!data) return NO;
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// Try for a direct CRC match.
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std::optional<ROM::Description> target_description;
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target_description = ROM::Description::from_crc(uint32_t(data.crc32.integerValue));
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// See whether there's an acceptable trimming that creates a CRC match.
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if(!target_description) {
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const std::vector<ROM::Description> descriptions = ROM::all_descriptions();
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for(const auto &description: descriptions) {
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if(description.size > data.length) continue;
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NSData *const trimmedData = [data subdataWithRange:NSMakeRange(0, description.size)];
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if(description.crc32s.find(uint32_t(trimmedData.crc32.unsignedIntValue)) != description.crc32s.end()) {
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target_description = description;
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break;
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}
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}
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}
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// If no destination was found, stop.
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if(!target_description) {
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return NO;
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}
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// Copy the data to its destination and report success.
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NSURL *const targetURL = [urlsFor(*target_description, target_description->file_names[0]) firstObject];
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[[NSFileManager defaultManager] createDirectoryAtPath:targetURL.URLByDeletingLastPathComponent.path withIntermediateDirectories:YES attributes:nil error:nil];
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[data writeToURL:targetURL atomically:NO];
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return YES;
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}
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ROMMachine::ROMFetcher CSROMFetcher(ROM::Request *missing) {
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return [missing] (const ROM::Request &roms) -> ROM::Map {
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ROM::Map results;
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for(const auto &description: roms.all_descriptions()) {
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for(const auto &file_name: description.file_names) {
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NSData *fileData;
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// Check for this file first within the application support directories.
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for(NSURL *fileURL in urlsFor(description, file_name)) {
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fileData = [NSData dataWithContentsOfURL:fileURL];
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if(fileData) break;
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}
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// Failing that, check inside the application bundle.
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if(!fileData) {
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fileData = [[NSBundle mainBundle]
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dataForResource:[NSString stringWithUTF8String:file_name.c_str()]
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withExtension:nil
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subdirectory:directoryFor(description)];
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}
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// Store an appropriate result.
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if(fileData) {
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results[description.name] = fileData.stdVector8;
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}
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}
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}
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if(missing) {
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*missing = roms.subtract(results);
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}
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return results;
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};
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}
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