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Code cleanup

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This commit is contained in:
Martin Tůma 2019-11-09 23:06:52 +01:00
parent 9ec3956672
commit 6d6dc9f316
1 changed files with 5 additions and 7 deletions
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12
src/map/IMG/trefile.cpp
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@ -3,7 +3,7 @@
#include "trefile.h" #include "trefile.h"
static void unlock(quint8 *dst, const quint8 *src, quint32 size, quint32 key) static void demangle(quint8 *data, quint32 size, quint32 key)
{ {
static const unsigned char shuf[] = { static const unsigned char shuf[] = {
0xb, 0xc, 0xa, 0x0, 0xb, 0xc, 0xa, 0x0,
@ -15,8 +15,8 @@ static void unlock(quint8 *dst, const quint8 *src, quint32 size, quint32 key)
int sum = shuf[((key >> 24) + (key >> 16) + (key >> 8) + key) & 0xf]; int sum = shuf[((key >> 24) + (key >> 16) + (key >> 8) + key) & 0xf];
for (quint32 i = 0, ringctr = 16; i < size; i++) { for (quint32 i = 0, ringctr = 16; i < size; i++) {
quint32 upper = src[i] >> 4; quint32 upper = data[i] >> 4;
quint32 lower = src[i]; quint32 lower = data[i];
upper -= sum; upper -= sum;
upper -= key >> ringctr; upper -= key >> ringctr;
@ -28,7 +28,7 @@ static void unlock(quint8 *dst, const quint8 *src, quint32 size, quint32 key)
lower -= shuf[(key >> ringctr) & 0xf]; lower -= shuf[(key >> ringctr) & 0xf];
ringctr = ringctr ? ringctr - 4 : 16; ringctr = ringctr ? ringctr - 4 : 16;
dst[i] = ((upper << 4) & 0xf0) | (lower & 0xf); data[i] = ((upper << 4) & 0xf0) | (lower & 0xf);
} }
} }
@ -79,11 +79,9 @@ bool TREFile::init()
return false; return false;
if (locked) { if (locked) {
quint32 key; quint32 key;
quint8 unlocked[64];
if (!seek(hdl, _gmpOffset + 0xAA) || !readUInt32(hdl, key)) if (!seek(hdl, _gmpOffset + 0xAA) || !readUInt32(hdl, key))
return false; return false;
unlock(unlocked, levels, levelsSize, key); demangle(levels, levelsSize, key);
memcpy(levels, unlocked, levelsSize);
} }
quint32 levelsCount = levelsSize / 4; quint32 levelsCount = levelsSize / 4;