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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;
}
}
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