C++ File::err方法代码示例

void ERFFile::load() {
	Common::File erf;
	open(erf);

	readHeader(erf);

	if ((_id != kERFID) && (_id != kMODID) && (_id != kHAKID) && (_id != kSAVID))
		throw Common::Exception("Not an ERF file");

	if ((_version != kVersion1) && (_version != kVersion2))
		throw Common::Exception("Unsupported ERF file version %08X", _version);

	if ((_version == kVersion2) && !_utf16le)
		throw Common::Exception("ERF file version 2.0, but not UTF-16LE");

	try {

		ERFHeader erfHeader;

		readERFHeader  (erf, erfHeader);
		readDescription(erf, erfHeader);

		if (!_noResources)
			readResources(erf, erfHeader);

		if (erf.err())
			throw Common::Exception(Common::kReadError);

	} catch (Common::Exception &e) {
		e.add("Failed reading ERF file");
		throw e;
	}

}

void ScriptManager::parseScrFile(const Common::String &fileName, bool isGlobal) {
	Common::File file;
	if (!file.open(fileName)) {
		warning("Script file not found: %s", fileName.c_str());
		return;
	}

	while(!file.eos()) {
		Common::String line = file.readLine();
		if (file.err()) {
			warning("Error parsing scr file: %s", fileName.c_str());
			return;
		}

		trimCommentsAndWhiteSpace(&line);
		if (line.empty())
			continue;

		if (line.matchString("puzzle:*", true)) {
			Puzzle *puzzle = new Puzzle();
			sscanf(line.c_str(),"puzzle:%u",&(puzzle->key));

			parsePuzzle(puzzle, file);
			if (isGlobal) {
				_globalPuzzles.push_back(puzzle);
			} else {
				_activePuzzles.push_back(puzzle);
			}
		} else if (line.matchString("control:*", true)) {
			parseControl(line, file);
		}
	}
}

void BIFFile::load() {
	Common::File bif;
	open(bif);

	readHeader(bif);

	if (_id != kBIFID)
		throw Common::Exception("Not a BIF file");

	if ((_version != kVersion1) && (_version != kVersion11))
		throw Common::Exception("Unsupported BIF file version %08X", _version);

	uint32 varResCount = bif.readUint32LE();
	uint32 fixResCount = bif.readUint32LE();

	if (fixResCount != 0)
		throw Common::Exception("TODO: Fixed BIF resources");

	_iResources.resize(varResCount);

	uint32 offVarResTable = bif.readUint32LE();

	try {

		readVarResTable(bif, offVarResTable);

		if (bif.err())
			throw Common::Exception(Common::kReadError);

	} catch (Common::Exception &e) {
		e.add("Failed reading BIF file");
		throw e;
	}

}

void NDSFile::load() {
	Common::File nds;
	open(nds);

	if (!isNDS(nds))
		throw Common::Exception("Not a support NDS ROM file");

	nds.seek(0x40);

	uint32 fileNameTableOffset = nds.readUint32LE();
	uint32 fileNameTableLength = nds.readUint32LE();
	uint32 fatOffset           = nds.readUint32LE();
	//uint32 fatLength = nds.readUint32LE();

	try {

		readNames(nds, fileNameTableOffset, fileNameTableLength);
		readFAT(nds, fatOffset);

	if (nds.err())
		throw Common::Exception(Common::kReadError);

	} catch (Common::Exception &e) {
		e.add("Failed reading NDS file");
		throw;
	}

}

//Gets AGIPAL Data
void GfxMgr::setAGIPal(int p0) {
	//If 0 from savefile, do not use
	if (p0 == 0)
		return;

	char filename[15];
	sprintf(filename, "pal.%d", p0);

	Common::File agipal;
	if (!agipal.open(filename)) {
		warning("Couldn't open AGIPAL palette file '%s'. Not changing palette", filename);
		return; // Needed at least by Naturette 3 which uses AGIPAL but provides no palette files
	}

	//Chunk0 holds colors 0-7
	agipal.read(&_agipalPalette[0], 24);

	//Chunk1 is the same as the chunk0

	//Chunk2 chunk holds colors 8-15
	agipal.seek(24, SEEK_CUR);
	agipal.read(&_agipalPalette[24], 24);

	//Chunk3 is the same as the chunk2

	//Chunks4-7 are duplicates of chunks0-3

	if (agipal.eos() || agipal.err()) {
		warning("Couldn't read AGIPAL palette from '%s'. Not changing palette", filename);
		return;
	}

	// Use only the lowest 6 bits of each color component (Red, Green and Blue)
	// because VGA used only 6 bits per color component (i.e. VGA had 18-bit colors).
	// This should now be identical to the original AGIPAL-hack's behavior.
	bool validVgaPalette = true;
	for (int i = 0; i < 16 * 3; i++) {
		if (_agipalPalette[i] >= (1 << 6)) {
			_agipalPalette[i] &= 0x3F; // Leave only the lowest 6 bits of each color component
			validVgaPalette = false;
		}
	}

	if (!validVgaPalette)
		warning("Invalid AGIPAL palette (Over 6 bits per color component) in '%s'. Using only the lowest 6 bits per color component", filename);

	_agipalFileNum = p0;

	initPalette(_agipalPalette);
	gfxSetPalette();

	debug(1, "Using AGIPAL palette from '%s'", filename);
}

int AgiEngine::loadWords(const char *fname) {
	Common::File fp;

	if (!fp.open(fname)) {
		warning("loadWords: can't open %s", fname);
		return errOK; // err_BadFileOpen
	}
	debug(0, "Loading dictionary: %s", fname);

	// Loop through alphabet, as words in the dictionary file are sorted by
	// first character
	for (int i = 0; i < 26; i++) {
		fp.seek(i * 2, SEEK_SET);
		int offset = fp.readUint16BE();
		if (offset == 0)
			continue;
		fp.seek(offset, SEEK_SET);
		int k = fp.readByte();
		while (!fp.eos() && !fp.err()) {
			// Read next word
			char c, str[64];
			do {
				c = fp.readByte();
				str[k++] = (c ^ 0x7F) & 0x7F;
			} while (!(c & 0x80) && k < (int)sizeof(str) - 1);
			str[k] = 0;

			// WORKAROUND:
			// The SQ0 fan game stores words starting with numbers (like '7up')
			// in its dictionary under the 'a' entry. We skip these.
			// See bug #3615061
			if (str[0] == 'a' + i) {
				// And store it in our internal dictionary
				AgiWord *w = new AgiWord;
				w->word = myStrndup(str, k);
				w->id = fp.readUint16BE();
				_game.words[i].push_back(w);
			}

			k = fp.readByte();

			// Are there more words with an already known prefix?
			// WORKAROUND: We only break after already seeing words with the
			// right prefix, for the SQ0 words starting with digits filed under
			// 'a'. See above comment and bug #3615061.
			if (k == 0 && str[0] >= 'a' + i)
				break;
		}
	}

	return errOK;
}

void ResMan::resOpen(uint32 id) {  // load resource ID into memory
	MemHandle *memHandle = resHandle(id);
	if (!memHandle)
		return;
	if (memHandle->cond == MEM_FREED) { // memory has been freed
		uint32 size = resLength(id);
		_memMan->alloc(memHandle, size);
		Common::File *clusFile = resFile(id);
		assert(clusFile);
		clusFile->seek(resOffset(id));
		clusFile->read(memHandle->data, size);
		if (clusFile->err() || clusFile->eos()) {
			error("Can't read %d bytes from offset %d from cluster file %s\nResource ID: %d (%08X)", size, resOffset(id), _prj.clu[(id >> 24) - 1].label, id, id);
		}

/**
 * Allocates enough RAM to hold the global Glitter variables.
 */
void RegisterGlobals(int num) {
	if (pGlobals == NULL) {
		numGlobals = num;

		hMasterScript = !TinselV2 ? 0 :
			READ_LE_UINT32(FindChunk(MASTER_SCNHANDLE, CHUNK_MASTER_SCRIPT));

		// Allocate RAM for pGlobals and make sure it's allocated
		pGlobals = (int32 *)calloc(numGlobals, sizeof(int32));
		if (pGlobals == NULL) {
			error("Cannot allocate memory for global data");
		}

		// Allocate RAM for interpret contexts and make sure it's allocated
		icList = (INT_CONTEXT *)calloc(NUM_INTERPRET, sizeof(INT_CONTEXT));
		if (icList == NULL) {
			error("Cannot allocate memory for interpret contexts");
		}
		g_scheduler->setResourceCallback(FreeInterpretContextPr);
	} else {
		// Check size is still the same
		assert(numGlobals == num);

		memset(pGlobals, 0, numGlobals * sizeof(int32));
		memset(icList, 0, NUM_INTERPRET * sizeof(INT_CONTEXT));
	}

	if (TinselV2) {
		// read initial values
		CdCD(nullContext);

		Common::File f;
		if (!f.open(GLOBALS_FILENAME))
			error(CANNOT_FIND_FILE, GLOBALS_FILENAME);

		int32 length = f.readSint32LE();
		if (length != num)
			error(FILE_IS_CORRUPT, GLOBALS_FILENAME);

		for (int i = 0; i < length; ++i)
			pGlobals[i] = f.readSint32LE();

		if (f.eos() || f.err())
			error(FILE_IS_CORRUPT, GLOBALS_FILENAME);

		f.close();
	}
}

// AUDIOnnn.MAP contains 10-byte entries:
// Early format:
// w 5 bits resource type and 11 bits resource number
// dw 7 bits volume number and 25 bits offset
// dw size
// Later format:
// w nEntry
// dw offset+volume (as in resource.map)
// dw size
// ending with 10 0xFFs
int ResourceManager::readAudioMapSCI1(ResourceSource *map, bool unload) {
	Common::File file;

	if (!file.open(map->getLocationName()))
		return SCI_ERROR_RESMAP_NOT_FOUND;

	bool oldFormat = (file.readUint16LE() >> 11) == kResourceTypeAudio;
	file.seek(0);

	for (;;) {
		uint16 n = file.readUint16LE();
		uint32 offset = file.readUint32LE();
		uint32 size = file.readUint32LE();

		if (file.eos() || file.err()) {
			warning("Error while reading %s", map->getLocationName().c_str());
			return SCI_ERROR_RESMAP_NOT_FOUND;
		}

		if (n == 0xffff)
			break;

		byte volume_nr;

		if (oldFormat) {
			n &= 0x07ff; // Mask out resource type
			volume_nr = offset >> 25; // most significant 7 bits
			offset &= 0x01ffffff; // least significant 25 bits
		} else {
			volume_nr = offset >> 28; // most significant 4 bits
			offset &= 0x0fffffff; // least significant 28 bits
		}

		ResourceSource *src = findVolume(map, volume_nr);

		if (src) {
			const ResourceId resId(kResourceTypeAudio, n);

			if (unload)
				removeAudioResource(resId);
			else
				addResource(resId, src, offset, size, map->getLocationName());
		} else {
			warning("Failed to find audio volume %i", volume_nr);
			return SCI_ERROR_NO_RESOURCE_FILES_FOUND;
		}
	}

/**
 * Read sound (or music) file data.  Call with SILENCE to free-up
 * any allocated memory.  Also returns size of data
 */
SoundPtr FileManager::getSound(const int16 sound, uint16 *size) {
	debugC(1, kDebugFile, "getSound(%d)", sound);

	// No more to do if SILENCE (called for cleanup purposes)
	if (sound == _vm->_soundSilence)
		return 0;

	// Open sounds file
	Common::File fp;                                // Handle to SOUND_FILE
	if (!fp.open(getSoundFilename())) {
		warning("Hugo Error: File not found %s", getSoundFilename());
		return 0;
	}

	if (!_hasReadHeader) {
		for (int i = 0; i < kMaxSounds; i++) {
			_soundHdr[i]._size = fp.readUint16LE();
			_soundHdr[i]._offset = fp.readUint32LE();
		}
		if (fp.err())
			error("Wrong sound file format");
		_hasReadHeader = true;
	}

	*size = _soundHdr[sound]._size;
	if (*size == 0)
		error("Wrong sound file format or missing sound %d", sound);

	// Allocate memory for sound or music, if possible
	SoundPtr soundPtr = (byte *)malloc(_soundHdr[sound]._size); // Ptr to sound data
	assert(soundPtr);

	// Seek to data and read it
	fp.seek(_soundHdr[sound]._offset, SEEK_SET);
	if (fp.read(soundPtr, _soundHdr[sound]._size) != _soundHdr[sound]._size)
		error("Wrong sound file format");

	fp.close();

	return soundPtr;
}

void NDSFile::load() {
	Common::File nds;
	open(nds);

	if (!readHeader(nds))
		throw Common::Exception("Not a valid NDS ROM file");

	try {

		readNames(nds, _fileNameTableOffset, _fileNameTableLength);
		readFAT(nds, _fatOffset);

	if (nds.err())
		throw Common::Exception(Common::kReadError);

	} catch (Common::Exception &e) {
		e.add("Failed reading NDS file");
		throw;
	}

}

bool PCMMusicPlayer::getNextChunk() {
	MusicSegment *musicSegments;
	int32 *script, *scriptBuffer;
	int id;
	int snum;
	uint32 sampleOffset, sampleLength, sampleCLength;
	Common::File file;
	byte *buffer;
	Common::SeekableReadStream *sampleStream;

	switch (_state) {
	case S_NEW:
	case S_NEXT:
		_forcePlay = false;

		script = scriptBuffer = (int32 *)LockMem(_hScript);

		// Set parameters for this chunk of music
		id = _scriptNum;
		while (id--)
			script = scriptBuffer + READ_32(script);
		snum = FROM_32(script[_scriptIndex++]);

		if (snum == MUSIC_JUMP || snum == MUSIC_END) {
			// Let usual code sort it out!
			_scriptIndex--;    // Undo increment
			_forcePlay = true; // Force a Play
			_state = S_END1;   // 'Goto' S_END1
			break;
		}

		musicSegments = (MusicSegment *) LockMem(_hSegment);

		assert(FROM_32(musicSegments[snum].numChannels) == 1);
		assert(FROM_32(musicSegments[snum].bitsPerSample) == 16);

		sampleOffset = FROM_32(musicSegments[snum].sampleOffset);
		sampleLength = FROM_32(musicSegments[snum].sampleLength);
		sampleCLength = (((sampleLength + 63) & ~63)*33)/64;

		if (!file.open(_filename))
			error(CANNOT_FIND_FILE, _filename.c_str());

		file.seek(sampleOffset);
		if (file.eos() || file.err() || (uint32)file.pos() != sampleOffset)
			error(FILE_IS_CORRUPT, _filename.c_str());

		buffer = (byte *) malloc(sampleCLength);
		assert(buffer);

		// read all of the sample
		if (file.read(buffer, sampleCLength) != sampleCLength)
			error(FILE_IS_CORRUPT, _filename.c_str());

		debugC(DEBUG_DETAILED, kTinselDebugMusic, "Creating ADPCM music chunk with size %d, "
				"offset %d (script %d.%d)", sampleCLength, sampleOffset,
				_scriptNum, _scriptIndex - 1);

		sampleStream = new Common::MemoryReadStream(buffer, sampleCLength, DisposeAfterUse::YES);

		delete _curChunk;
		_curChunk = new Tinsel8_ADPCMStream(sampleStream, DisposeAfterUse::YES, sampleCLength,
				22050, 1, 32);

		_state = S_MID;
		return true;

	case S_END1:
		debugC(DEBUG_DETAILED, kTinselDebugMusic, "Music reached state S_END1 (script %d.%d)",
				_scriptNum, _scriptIndex);

		script = scriptBuffer = (int32 *) LockMem(_hScript);

		id = _scriptNum;
		while (id--)
			script = scriptBuffer + READ_32(script);
		snum = FROM_32(script[_scriptIndex]);

		if (snum == MUSIC_END) {
			_state = S_END2;
		} else {
			if (snum == MUSIC_JUMP)
				_scriptIndex = FROM_32(script[_scriptIndex+1]);

			_state = _forcePlay ? S_NEW : S_NEXT;
			_forcePlay = false;
		}

		return true;

	case S_END2:
		debugC(DEBUG_DETAILED, kTinselDebugMusic, "Music reached state S_END2 (script %d.%d)",
				_scriptNum, _scriptIndex);

		_silenceSamples = 11025; // Half a second of silence
		return true;

	case S_END3:
		debugC(DEBUG_DETAILED, kTinselDebugMusic, "Music reached state S_END3 (script %d.%d)",
				_scriptNum, _scriptIndex);
//.........这里部分代码省略.........

/**
 * Opens and inits all MIDI sequence files.
 */
void OpenMidiFiles() {
	Common::File midiStream;

	if (TinselV0) {
		// The early demo version of DW1 doesn't have MIDI
	} else if (TinselV2) {
		// DW2 uses a different music mechanism
	} else if (TinselV1Mac) {
		// open MIDI sequence file in binary mode
		if (!midiStream.open(MIDI_FILE))
			error(CANNOT_FIND_FILE, MIDI_FILE);

		uint32 curTrack = 1;
		uint32 songLength = 0;
		int32 fileSize = midiStream.size();

		// Init
		for (int i = 0; i < ARRAYSIZE(g_midiOffsets); i++)
			g_midiOffsets[i] = 0;

		midiStream.skip(4);	// skip file header

		while (!midiStream.eos() && !midiStream.err() && midiStream.pos() != fileSize) {
			assert(curTrack < ARRAYSIZE(g_midiOffsets));
			g_midiOffsets[curTrack] = midiStream.pos();
			//debug("%d: %d", curTrack, g_midiOffsets[curTrack]);

			songLength = midiStream.readUint32BE();
			midiStream.skip(songLength);

			curTrack++;
		}

		midiStream.close();
	} else {
		if (g_midiBuffer.pDat)
			// already allocated
			return;

		// open MIDI sequence file in binary mode
		if (!midiStream.open(MIDI_FILE))
			error(CANNOT_FIND_FILE, MIDI_FILE);

		// get length of the largest sequence
		g_midiBuffer.size = midiStream.readUint32LE();
		if (midiStream.eos() || midiStream.err())
			error(FILE_IS_CORRUPT, MIDI_FILE);

		if (g_midiBuffer.size) {
			// allocate a buffer big enough for the largest MIDI sequence
			if ((g_midiBuffer.pDat = (uint8 *)malloc(g_midiBuffer.size)) != NULL) {
				// clear out the buffer
				memset(g_midiBuffer.pDat, 0, g_midiBuffer.size);
			}
		}

		// Now scan through the contents of the MIDI file to find the offset
		// of each individual track, in order to create a mapping from MIDI
		// offset to track number, for the enhanced MIDI soundtrack.
		// The first song is always at position 4. The subsequent ones are
		// calculated dynamically.
		uint32 curOffset = 4;
		uint32 curTrack = 0;
		uint32 songLength = 0;

		// Init
		for (int i = 0; i < ARRAYSIZE(g_midiOffsets); i++)
			g_midiOffsets[i] = 0;

		while (!midiStream.eos() && !midiStream.err()) {
			if (curOffset + (4 * curTrack) >= (uint32)midiStream.size())
				break;

			assert(curTrack < ARRAYSIZE(g_midiOffsets));
			g_midiOffsets[curTrack] = curOffset + (4 * curTrack);
			//debug("%d: %d", curTrack, midiOffsets[curTrack]);

			songLength = midiStream.readUint32LE();
			curOffset += songLength;
			midiStream.skip(songLength);

			curTrack++;
		}

		midiStream.close();
	}
}

/**
 * Plays an animated cutscene.
 * @param id the id of the file
 */
bool MoviePlayer::load(uint32 id) {
	Common::File f;
	Common::String filename;

	if (_decoderType == kVideoDecoderDXA)
		_bgSoundStream = Audio::SeekableAudioStream::openStreamFile(sequenceList[id]);
	else
		_bgSoundStream = NULL;

	if (SwordEngine::_systemVars.showText) {
		filename = Common::String::format("%s.txt", sequenceList[id]);
		if (f.open(filename)) {
			Common::String line;
			int lineNo = 0;
			int lastEnd = -1;

			_movieTexts.clear();
			while (!f.eos() && !f.err()) {
				line = f.readLine();
				lineNo++;
				if (line.empty() || line[0] == '#') {
					continue;
				}

				const char *ptr = line.c_str();

				// TODO: Better error handling
				int startFrame = strtoul(ptr, const_cast<char **>(&ptr), 10);
				int endFrame = strtoul(ptr, const_cast<char **>(&ptr), 10);

				while (*ptr && Common::isSpace(*ptr))
					ptr++;

				if (startFrame > endFrame) {
					warning("%s:%d: startFrame (%d) > endFrame (%d)", filename.c_str(), lineNo, startFrame, endFrame);
					continue;
				}

				if (startFrame <= lastEnd) {
					warning("%s:%d startFrame (%d) <= lastEnd (%d)", filename.c_str(), lineNo, startFrame, lastEnd);
					continue;
				}
				
				int color = 0;
				if (*ptr == '@') {
					++ptr;
					color = strtoul(ptr, const_cast<char **>(&ptr), 10);
					while (*ptr && Common::isSpace(*ptr))
						ptr++;
				} 

				_movieTexts.push_back(MovieText(startFrame, endFrame, ptr, color));
				lastEnd = endFrame;
			}
			f.close();
		}
	}

	switch (_decoderType) {
	case kVideoDecoderDXA:
		filename = Common::String::format("%s.dxa", sequenceList[id]);
		break;
	case kVideoDecoderSMK:
		filename = Common::String::format("%s.smk", sequenceList[id]);
		break;
	case kVideoDecoderPSX:
		filename = Common::String::format("%s.str", (_vm->_systemVars.isDemo) ? sequenceList[id] : sequenceListPSX[id]);

		// Need to switch to true color
		initGraphics(g_system->getWidth(), g_system->getHeight(), true, 0);

		// Need to load here in case it fails in which case we'd need
		// to go back to paletted mode
		if (_decoder->loadFile(filename)) {
			return true;
		} else {
			initGraphics(g_system->getWidth(), g_system->getHeight(), true);
			return false;
		}
		break;
	}

	return _decoder->loadFile(filename.c_str());
}

/**
 * Opens and inits all MIDI sequence files.
 */
void OpenMidiFiles() {
	Common::File midiStream;

	// Demo version has no midi file
	// Also, Discworld PSX uses still unsupported psx SEQ format for music...
	if ((_vm->getFeatures() & GF_DEMO) || (TinselVersion == TINSEL_V2) || TinselV1PSX)
		return;

	if (midiBuffer.pDat)
		// already allocated
		return;

	// open MIDI sequence file in binary mode
	if (!midiStream.open(MIDI_FILE))
		error(CANNOT_FIND_FILE, MIDI_FILE);

	// gen length of the largest sequence
	midiBuffer.size = midiStream.readUint32LE();
	if (midiStream.eos() || midiStream.err())
		error(FILE_IS_CORRUPT, MIDI_FILE);

	if (midiBuffer.size) {
		// allocate a buffer big enough for the largest MIDI sequence
		if ((midiBuffer.pDat = (uint8 *)malloc(midiBuffer.size)) != NULL) {
			// clear out the buffer
			memset(midiBuffer.pDat, 0, midiBuffer.size);
//			VMM_lock(midiBuffer.pDat, midiBuffer.size);
		} else {
			//mSeqHandle = NULL;
		}
	}

	// Now scan through the contents of the MIDI file to find the offset
	// of each individual track, in order to create a mapping from MIDI
	// offset to track number, for the enhanced MIDI soundtrack.
	// The first song is always at position 4. The subsequent ones are
	// calculated dynamically.
	uint32 curOffset = 4;
	uint32 curTrack = 0;
	uint32 songLength = 0;

	// Init
	for (int i = 0; i < ARRAYSIZE(midiOffsets); i++)
		midiOffsets[i] = 0;

	while (!midiStream.eos() && !midiStream.err()) {
		if (curOffset + (4 * curTrack) >= (uint32)midiStream.size())
			break;

		assert(curTrack < ARRAYSIZE(midiOffsets));
		midiOffsets[curTrack] = curOffset + (4 * curTrack);
		//debug("%d: %d", curTrack, midiOffsets[curTrack]);

		songLength = midiStream.readUint32LE();
		curOffset += songLength;
		midiStream.skip(songLength);

		curTrack++;
	}

	midiStream.close();
}