C++ File::eos方法代码示例

// Will try to set amiga palette by using "spal" file. If not found, we return false
bool GfxPalette::setAmiga() {
	Common::File file;

	if (file.open("spal")) {
		for (int curColor = 0; curColor < 32; curColor++) {
			byte byte1 = file.readByte();
			byte byte2 = file.readByte();

			if (file.eos())
				error("Amiga palette file ends prematurely");

			_sysPalette.colors[curColor].used = 1;
			_sysPalette.colors[curColor].r = (byte1 & 0x0F) * 0x11;
			_sysPalette.colors[curColor].g = ((byte2 & 0xF0) >> 4) * 0x11;
			_sysPalette.colors[curColor].b = (byte2 & 0x0F) * 0x11;

			if (_totalScreenColors == 64) {
				// Set the associated color from the Amiga halfbrite colors
				_sysPalette.colors[curColor + 32].used = 1;
				_sysPalette.colors[curColor + 32].r = _sysPalette.colors[curColor].r >> 1;
				_sysPalette.colors[curColor + 32].g = _sysPalette.colors[curColor].g >> 1;
				_sysPalette.colors[curColor + 32].b = _sysPalette.colors[curColor].b >> 1;
			}
		}

		// Directly set the palette, because setOnScreen() wont do a thing for amiga
		copySysPaletteToScreen();
		return true;
	}

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);
		}
	}
}

	bool readBit8u(MT32Emu::Bit8u *in) {
		byte b = _in.readByte();
		if (_in.eos())
			return false;
		*in = b;
		return true;
	}

//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);
		}

void StringManager::loadStrFile(const Common::String &fileName) {
	Common::File file;
	if (!_engine->getSearchManager()->openFile(file, fileName)) {
		error("%s does not exist. String parsing failed", fileName.c_str());
	}

	uint lineNumber = 0;
	while (!file.eos()) {
		_lines[lineNumber] = readWideLine(file);

		lineNumber++;
		assert(lineNumber <= NUM_TEXT_LINES);
	}
}

/**
 * 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();
	}
}

void TitlerControl::readStringsFile(const Common::String &fileName) {
	Common::File file;
	if (!_engine->getSearchManager()->openFile(file, fileName)) {
		warning("String_resource_file %s could could be opened", fileName.c_str());
		return;
	}

	_strings.clear();

	while (!file.eos()) {

		Common::String line = readWideLine(file);
		_strings.push_back(line);
	}
	file.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;
		}
	}

TLib::TLib(MemoryManager &memManager, const Common::String &filename) :
		_memoryManager(memManager) {

	// If the resource strings list isn't yet loaded, load them
	if (_resStrings.size() == 0) {
		Common::File f;
		if (f.open("tsage.cfg")) {
			while (!f.eos()) {
				_resStrings.push_back(f.readLine());
			}
			f.close();
		}
	}

	if (!_file.open(filename))
		error("Missing file %s", filename.c_str());

	loadIndex();
}

// Will try to set amiga palette by using "spal" file. If not found, we return false
bool GfxPalette::setAmiga() {
	Common::File file;

	if (file.open("spal")) {
		for (int curColor = 0; curColor < 32; curColor++) {
			byte byte1 = file.readByte();
			byte byte2 = file.readByte();

			if (file.eos())
				error("Amiga palette file ends prematurely");

			_sysPalette.colors[curColor].used = 1;
			_sysPalette.colors[curColor].r = (byte1 & 0x0F) * 0x11;
			_sysPalette.colors[curColor].g = ((byte2 & 0xF0) >> 4) * 0x11;
			_sysPalette.colors[curColor].b = (byte2 & 0x0F) * 0x11;
		}

		// Directly set the palette, because setOnScreen() wont do a thing for amiga
		copySysPaletteToScreen();
		return true;
	}

	return false;
}

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.........

	bool isEOF() {
		return _in.isOpen() && _in.eos();
	}

bool fileToStack(const Common::String &filename, StackHandler *sH) {

	Variable stringVar;
	stringVar.varType = SVT_NULL;
	Common::String checker = saveEncoding ? "[Custom data (encoded)]\r\n" : "[Custom data (ASCII)]\n";

	Common::File fd;

	if (!fd.open(filename)) {
#if 0
		char currentDir[1000];
		if (!getcwd(currentDir, 998)) {
			debugOut("Can't get current directory.\n");
		}

		if (chdir(gamePath)) {
			debugOut("Error: Failed changing to directory %s\n", gamePath);
		}

		if (chdir(currentDir)) {
			debugOut("Error: Failed changing to directory %s\n", currentDir);
		}

		if (!fd.open(filename)) {
			return fatal("No such file", filename);
		}
#endif
		return fatal("No such file", filename); //TODO: false value
	}

	encode1 = (byte)saveEncoding & 255;
	encode2 = (byte)(saveEncoding >> 8);

	for (uint i = 0; i < checker.size(); ++i) {
		if (fd.readByte() != checker[i]) {
			fd.close();
			return fatal(LOAD_ERROR "This isn't a SLUDGE custom data file:", filename);
		}
	}

	if (saveEncoding) {
		checker = readStringEncoded(&fd);
		if (checker == UTF8_CHECKER) {
			fd.close();
			return fatal(
			LOAD_ERROR "The current file encoding setting does not match the encoding setting used when this file was created:", filename);
		}
	}

	for (;;) {
		if (saveEncoding) {
			char i = fd.readByte() ^ encode1;

			if (fd.eos())
				break;
			switch (i) {
				case 0: {
					Common::String g = readStringEncoded(&fd);
					makeTextVar(stringVar, g);
				}
					break;

				case 1:
					setVariable(stringVar, SVT_INT, fd.readUint32LE());
					break;

				case 2:
					setVariable(stringVar, SVT_INT, fd.readByte());
					break;

				default:
					fatal(LOAD_ERROR "Corrupt custom data file:", filename);
					fd.close();
					return false;
			}
		} else {
			char *line = readTextPlain(&fd);
			if (!line)
				break;
			makeTextVar(stringVar, line);
		}

		if (sH->first == NULL) {
			// Adds to the TOP of the array... oops!
			if (!addVarToStackQuick(stringVar, sH->first))
				return false;
			sH->last = sH->first;
		} else {
			// Adds to the END of the array... much better
			if (!addVarToStackQuick(stringVar, sH->last->next))
				return false;
			sH->last = sH->last->next;
		}
	}
	fd.close();

	return true;
}