Initial commit

engines/scumm/he/localizer.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 "common/endian.h"
+#include "scumm/he/localizer.h"
+#include "common/file.h"
+#include "common/debug.h"
+
+namespace Scumm {
+
+Localizer::Localizer() {
+	Common::File _file;
+
+	_isValid = false;
+
+	if (!_file.open("lokalizator.big"))
+		return;
+
+	uint _fileSize = _file.size();
+	if (_fileSize < 0x18)
+		return;
+	byte *lkBig = new byte[_fileSize];
+	_file.read(lkBig, _fileSize);
+	// Obfuscation round 1
+	for (uint i = 0; i < _fileSize; i++)
+		lkBig[i] ^= (214013 * i + 2531011) >> 16;
+
+	uint32 numFiles = READ_LE_UINT32(lkBig + 0x14);
+	uint32 localeMsgOffset = 0, localeMsgSize = 0;
+	uint32 talkieDatOffset = 0, talkieDatSize = 0;
+
+	for (uint i = 0; i < numFiles; i++) {
+		byte *fileHdr = lkBig + 0x18 + 0x4c * i;
+		if (strcmp((char *) fileHdr, "locale.msg") == 0) {
+			localeMsgOffset = READ_LE_UINT32(fileHdr + 0x48);
+			localeMsgSize = READ_LE_UINT32(fileHdr + 0x44);
+			continue;
+		}
+		if (strcmp((char *) fileHdr, "talkie.dat") == 0) {
+			talkieDatOffset = READ_LE_UINT32(fileHdr + 0x48);
+			talkieDatSize = READ_LE_UINT32(fileHdr + 0x44);
+			continue;
+		}
+	}
+
+	_isValid = true;
+
+	if (localeMsgSize > 4) {
+		uint32 msgCount = READ_LE_UINT32(lkBig + localeMsgOffset);
+		// Obfuscation round 2
+		uint32 st = 0x12345678;
+		for (uint i = 0; i < localeMsgSize - 4; i++) {
+			byte x = 0;
+			switch (i & 3) {
+			case 0:
+				x = st;
+				break;
+			case 1:
+				x = st + 35;
+				break;
+			case 2:
+				x = st + 70;
+				break;
+			case 3:
+				x = st + 105;
+				st += 45707404;
+				break;
+			}
+			lkBig[i + localeMsgOffset + 4] ^= x;
+		}
+
+		uint32 cur = localeMsgOffset + 4;
+
+		for (uint i = 0; i < msgCount && cur < localeMsgOffset + localeMsgSize; i++) {
+			cur += 4; // Domain id or something like this, always zero
+			uint32 lenOrig = READ_LE_UINT32(lkBig + cur); cur += 4;
+			Common::String orig((char *) lkBig + cur, (char *) lkBig + cur + lenOrig);
+			cur += lenOrig;
+			uint32 lenTrans = READ_LE_UINT32(lkBig + cur); cur += 4;
+			Common::String trans((char *) lkBig + cur, (char *) lkBig + cur + lenTrans);
+			cur += lenTrans;
+			_translationMap[orig] = trans;
+		}
+	}
+
+	for (uint32 cur = talkieDatOffset; cur < talkieDatOffset + talkieDatSize; cur += 16) {
+		if (cur + 12 < _fileSize) {
+		    _talkMap[READ_LE_UINT32(lkBig+cur+4)] = READ_LE_UINT32(lkBig+cur+12);
+		} else {
+			warning("Localizer: Skipped overflow bytes at 0x%x", cur);
+		}
+	}
+}
+
+Common::String Localizer::translate(const Common::String &orig) {
+	if (_translationMap.contains(orig)) {
+		return _translationMap[orig];
+	}
+	return orig;
+}
+
+uint32 Localizer::mapTalk(uint32 orig) {
+	if (_talkMap.contains(orig)) {
+		return _talkMap[orig];
+	}
+	return orig;
+}
+
+}