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engines/icb/zsupport.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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1999-2000 Revolution Software Ltd.
+ * This code is based on source code created by Revolution Software,
+ * used with permission.
+ *
+ * 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 "engines/icb/common/px_common.h"
+#include "engines/icb/p4.h"
+#include "engines/icb/zsupport.h"
+#include "engines/icb/res_man_pc.h"
+
+namespace ICB {
+
+#define BUFLEN 65536
+
+//static char buf[BUFLEN];
+
+uint32 fileGetZipLength(const char *inFn) {
+	Common::SeekableReadStream *fileStream = openDiskFileForBinaryStreamRead(inFn);
+	uint32 len = fileGetZipLength2(fileStream);
+	delete fileStream;
+	return len;
+}
+
+uint32 fileGetZipLength2(Common::SeekableReadStream *fileStream) {
+	error("TODO: Fix compression");
+#if 0
+	gzFile in;
+	uint32 t = 0;
+
+	int32 noOfFile = fileno(file);
+	in = gzdopen(noOfFile , "rb");
+
+	if (in == NULL)
+		return 0;
+
+	gzread(in, &t, sizeof(int32));
+
+	return t;
+#endif
+}
+
+uint32 memUncompress(uint8 *outMem, const char *inFn) {
+	Common::SeekableReadStream *fileStream = openDiskFileForBinaryStreamRead(inFn);
+
+	uint32 retVal = memUncompress(outMem, inFn, fileStream);
+
+	delete fileStream;
+
+	return retVal;
+}
+
+uint32 memUncompress(uint8 *outMem, const char *inFn, Common::SeekableReadStream *file) {
+	error("TODO: Fix compression");
+#if 0
+	gzFile in;
+	uint8 *myp;
+	uint32 uncompressedLen;
+
+
+	int32 noOfFile = fileno(file);
+	in = gzdopen(noOfFile , "rb");
+
+	if (in == NULL) {
+		fprintf(stderr, "error opening zipped file %s\n", inFn);
+		return 0;
+	}
+	// Read the length
+	if (gzread(in, &uncompressedLen, 4) != 4) {
+		fprintf(stderr, "error in zipped file %s\n", inFn);
+		return 0;
+	}
+
+	uint32 bytesRead = 0;
+	uint32 bytesToRead = uncompressedLen;
+
+	myp = outMem;
+
+	while (bytesToRead) {
+		// Work out how much to read this go
+		uint32 bytesToReadThisPass = bytesToRead;
+		// Only fill a buffer
+		if (bytesToReadThisPass > BUFLEN)
+			bytesToReadThisPass = BUFLEN;
+
+		// Read in those bytes
+		uint32 bytesReadThisPass = gzread(in, buf, bytesToReadThisPass);
+		if (bytesReadThisPass == 0)
+			break;
+
+		// Uypdate the counters and pointers
+		bytesRead += bytesReadThisPass;
+		bytesToRead -= bytesReadThisPass;
+
+		// And copy the data over
+		memcpy(myp, buf, bytesReadThisPass);
+		myp += bytesReadThisPass;
+	}
+#endif
+	return 1;
+}
+
+} // End of namespace ICB