104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fs.h"
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#include "resource_mac.h"
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#include "util.h"
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const char *ResourceMac::FILENAME1 = "Flashback.bin";
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const char *ResourceMac::FILENAME2 = "Flashback.rsrc";
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ResourceMac::ResourceMac(const char *filePath, FileSystem *fs)
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: _dataOffset(0), _types(0), _entries(0) {
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memset(&_map, 0, sizeof(_map));
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_f.open(filePath, "rb", fs);
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}
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ResourceMac::~ResourceMac() {
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if (_entries) {
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for (int i = 0; i < _map.typesCount; ++i) {
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free(_entries[i]);
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}
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free(_entries);
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}
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free(_types);
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}
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void ResourceMac::load() {
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const uint32_t sig = _f.readUint32BE();
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if (sig == 0x00051607) { // AppleDouble
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debug(DBG_INFO, "Load Macintosh data from AppleDouble");
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_f.seek(24);
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const int count = _f.readUint16BE();
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for (int i = 0; i < count; ++i) {
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const int id = _f.readUint32BE();
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const int offset = _f.readUint32BE();
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const int length = _f.readUint32BE();
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if (id == 2) { // resource fork
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loadResourceFork(offset, length);
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break;
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}
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}
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} else { // MacBinary
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debug(DBG_INFO, "Load Macintosh data from MacBinary");
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_f.seek(83);
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uint32_t dataSize = _f.readUint32BE();
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uint32_t resourceOffset = 128 + ((dataSize + 127) & ~127);
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loadResourceFork(resourceOffset, dataSize);
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}
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}
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void ResourceMac::loadResourceFork(uint32_t resourceOffset, uint32_t dataSize) {
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_f.seek(resourceOffset);
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_dataOffset = resourceOffset + _f.readUint32BE();
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uint32_t mapOffset = resourceOffset + _f.readUint32BE();
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_f.seek(mapOffset + 22);
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_f.readUint16BE();
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_map.typesOffset = _f.readUint16BE();
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_map.namesOffset = _f.readUint16BE();
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_map.typesCount = _f.readUint16BE() + 1;
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_f.seek(mapOffset + _map.typesOffset + 2);
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_types = (ResourceMacType *)calloc(_map.typesCount, sizeof(ResourceMacType));
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for (int i = 0; i < _map.typesCount; ++i) {
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_f.read(_types[i].id, 4);
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_types[i].count = _f.readUint16BE() + 1;
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_types[i].startOffset = _f.readUint16BE();
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}
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_entries = (ResourceMacEntry **)calloc(_map.typesCount, sizeof(ResourceMacEntry *));
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for (int i = 0; i < _map.typesCount; ++i) {
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_f.seek(mapOffset + _map.typesOffset + _types[i].startOffset);
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_entries[i] = (ResourceMacEntry *)calloc(_types[i].count, sizeof(ResourceMacEntry));
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for (int j = 0; j < _types[i].count; ++j) {
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_entries[i][j].id = _f.readUint16BE();
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_entries[i][j].nameOffset = _f.readUint16BE();
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_entries[i][j].dataOffset = _f.readUint32BE() & 0x00FFFFFF;
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_f.readUint32BE();
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}
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for (int j = 0; j < _types[i].count; ++j) {
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_entries[i][j].name[0] = '\0';
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if (_entries[i][j].nameOffset != 0xFFFF) {
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_f.seek(mapOffset + _map.namesOffset + _entries[i][j].nameOffset);
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const int len = _f.readByte();
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assert(len < kResourceMacEntryNameLength - 1);
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_f.read(_entries[i][j].name, len);
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_entries[i][j].name[len] = '\0';
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}
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}
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}
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}
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const ResourceMacEntry *ResourceMac::findEntry(const char *name) const {
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for (int type = 0; type < _map.typesCount; ++type) {
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for (int i = 0; i < _types[type].count; ++i) {
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if (strcmp(name, _entries[type][i].name) == 0) {
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return &_entries[type][i];
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}
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}
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}
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return 0;
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}
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