Initial commit

engines/hopkins/files.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "hopkins/files.h"
+
+#include "hopkins/hopkins.h"
+#include "hopkins/globals.h"
+
+#include "common/config-manager.h"
+#include "common/system.h"
+#include "common/debug.h"
+#include "common/file.h"
+#include "common/str.h"
+#include "common/savefile.h"
+
+namespace Hopkins {
+
+FileManager::FileManager(HopkinsEngine *vm) {
+	_vm = vm;
+
+	_catalogPos = 0;
+	_catalogSize = 0;
+}
+
+/**
+ * Load a file
+ */
+byte *FileManager::loadFile(const Common::Path &file) {
+	Common::File f;
+	if (!f.open(file))
+		error("Error opening %s", file.toString().c_str());
+
+	// Allocate space for the file contents
+	size_t filesize = f.size();
+	byte *data = _vm->_globals->allocMemory(filesize+1);
+	if (!data)
+		error("Error allocating space for file being loaded - %s", file.toString().c_str());
+
+	readStream(f, data, filesize);
+	f.close();
+	data[filesize] = '\0';
+
+	return data;
+}
+
+/**
+ * Read a given number of bytes from a Stream into a pre-allocated buffer
+ */
+int FileManager::readStream(Common::ReadStream &stream, void *buf, size_t nbytes) {
+	return stream.read(buf, nbytes);
+}
+
+/**
+ * The original censorship was based on blood.dat file.
+ * It's now using the config manager and a per-engine GUI option.
+ */
+void FileManager::initCensorship() {
+	_vm->_globals->_censorshipFl = !ConfMan.getBool("enable_gore");
+}
+
+/**
+ * Check if a file is present
+ */
+bool FileManager::fileExists(const Common::Path &file) {
+	Common::File f;
+
+	return f.exists(file);
+}
+
+/**
+ * Search file in Cat file
+ */
+byte *FileManager::searchCat(const Common::Path &file, CatMode mode, bool &fileFoundFl) {
+	byte *ptr = nullptr;
+	fileFoundFl = true;
+	Common::File f;
+
+	Common::String filename = file.toString('/');
+	Common::Path secondaryFilename;
+	filename.toUppercase();
+
+	switch (mode) {
+	case RES_INI:
+		if (!f.exists("RES_INI.CAT")) {
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		ptr = loadFile("RES_INI.CAT");
+		secondaryFilename = "RES_INI.RES";
+		break;
+
+	case RES_REP:
+		if (!f.exists("RES_REP.CAT")) {
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		ptr = loadFile("RES_REP.CAT");
+		secondaryFilename = "RES_REP.RES";
+		break;
+
+	case RES_LIN:
+		if (!f.exists("RES_LIN.CAT")) {
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		ptr = loadFile("RES_LIN.CAT");
+		secondaryFilename = "RES_LIN.RES";
+		break;
+
+	case RES_PER:
+		if (!f.exists("RES_PER.CAT")) {
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		ptr = loadFile("RES_PER.CAT");
+		secondaryFilename = "RES_PER.RES";
+		break;
+
+	case RES_PIC:
+		if (!f.exists("PIC.CAT")) {
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		ptr = loadFile("PIC.CAT");
+		break;
+
+	case RES_SAN:
+		if (!f.exists("RES_SAN.CAT")) {
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		ptr = loadFile("RES_SAN.CAT");
+		break;
+
+	case RES_SLI:
+		if (!f.exists("RES_SLI.CAT")) {
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		ptr = loadFile("RES_SLI.CAT");
+		break;
+
+	case RES_VOI: {
+		Common::Path tmpFilename;
+		if (_vm->getPlatform() == Common::kPlatformOS2 || _vm->getPlatform() == Common::kPlatformBeOS)
+			tmpFilename = "ENG_VOI.CAT";
+		// Win95 and Linux versions uses another set of names
+		else {
+			switch (_vm->_globals->_language) {
+			case LANG_EN:
+				tmpFilename = "RES_VAN.CAT";
+				break;
+			case LANG_FR:
+				tmpFilename = "RES_VFR.CAT";
+				break;
+			case LANG_SP:
+				tmpFilename = "RES_VES.CAT";
+				break;
+			default:
+				break;
+			}
+		}
+
+		if (!f.exists(tmpFilename)) {
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		ptr = loadFile(tmpFilename);
+		break;
+		}
+
+	default:
+		break;
+	}
+
+	// Scan for an entry in the catalogue
+	byte *result;
+	bool matchFlag = false;
+	int offsetVal = 0;
+
+	while (!matchFlag) {
+		Common::String name = (const char *)ptr + offsetVal;
+
+		if (name == filename) {
+			// Found entry for file, so get it's details from the catalogue entry
+			const byte *pData = ptr + offsetVal;
+			_catalogPos = READ_LE_UINT32(pData + 15);
+			_catalogSize = READ_LE_UINT32(pData + 19);
+			matchFlag = true;
+		}
+
+		if (name == "FINIS") {
+			_vm->_globals->freeMemory(ptr);
+			fileFoundFl = false;
+			return nullptr;
+		}
+
+		offsetVal += 23;
+	}
+
+	_vm->_globals->freeMemory(ptr);
+
+	if (!secondaryFilename.empty()) {
+		if (!f.open(secondaryFilename))
+			error("CHARGE_FICHIER");
+
+		f.seek(_catalogPos);
+
+		byte *catData = _vm->_globals->allocMemory(_catalogSize);
+		if (catData == nullptr)
+			error("CHARGE_FICHIER");
+
+		readStream(f, catData, _catalogSize);
+		f.close();
+		result = catData;
+	} else {
+		result = nullptr;
+	}
+
+	return result;
+}
+
+/**
+ * Returns the size of a file. Throws an error if the file can't be found
+ */
+uint32 FileManager::fileSize(const Common::Path &filename) {
+	Common::File f;
+	uint32 size;
+
+	if (!f.open(filename))
+		error("Could not find file %s", filename.toString().c_str());
+
+	size = f.size();
+	f.close();
+
+	return size;
+}
+
+} // End of namespace Hopkins