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- add check for unity version of Nerve.wad

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- infrastructure in place in case Nerve.wad changes again, this can be extended
This commit is contained in:
Rachael Alexanderson 2020-01-18 15:22:59 -05:00 committed by Christoph Oelckers
parent 747c6dcbc9
commit 14dc46772c
1 changed files with 17 additions and 6 deletions
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23
src/gamedata/w_wad.cpp
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@ -926,7 +926,8 @@ void FWadCollection::RenameSprites (const TArray<FString> &deletelumps)
//
// Renames map headers and map name pictures in nerve.wad so as to load it
// alongside Doom II and offer both episodes without causing conflicts.
// MD5 checksum for NERVE.WAD: 967d5ae23daf45196212ae1b605da3b0
// MD5 checksum for NERVE.WAD: 967d5ae23daf45196212ae1b605da3b0 (3,819,855)
// MD5 checksum for Unity version of NERVE.WAD: 4214c47651b63ee2257b1c2490a518c9 (3,821,966)
//
//==========================================================================
void FWadCollection::RenameNerve ()
@ -934,20 +935,30 @@ void FWadCollection::RenameNerve ()
if (gameinfo.gametype != GAME_Doom)
return;
const int numnerveversions = 2;
bool found = false;
uint8_t cksum[16];
static const uint8_t nerve[16] = { 0x96, 0x7d, 0x5a, 0xe2, 0x3d, 0xaf, 0x45, 0x19,
0x62, 0x12, 0xae, 0x1b, 0x60, 0x5d, 0xa3, 0xb0 };
size_t nervesize = 3819855; // NERVE.WAD's file size
static const uint8_t nerve[numnerveversions][16] = {
{ 0x96, 0x7d, 0x5a, 0xe2, 0x3d, 0xaf, 0x45, 0x19,
0x62, 0x12, 0xae, 0x1b, 0x60, 0x5d, 0xa3, 0xb0 },
{ 0x42, 0x14, 0xc4, 0x76, 0x51, 0xb6, 0x3e, 0xe2,
0x25, 0x7b, 0x1c, 0x24, 0x90, 0xa5, 0x18, 0xc9 }
};
size_t nervesize[numnerveversions] = { 3819855, 3821966 } ; // NERVE.WAD's file size
int w = GetIwadNum();
while (++w < GetNumWads())
{
auto fr = GetFileReader(w);
int isizecheck = -1;
if (fr == NULL)
{
continue;
}
if (fr->GetLength() != (long)nervesize)
for (int icheck = 0; icheck < numnerveversions; icheck++)
if (fr->GetLength() == (long)nervesize[icheck])
isizecheck = icheck;
if (isizecheck == -1)
{
// Skip MD5 computation when there is a
// cheaper way to know this is not the file
@ -957,7 +968,7 @@ void FWadCollection::RenameNerve ()
MD5Context md5;
md5.Update(*fr, (unsigned)fr->GetLength());
md5.Final(cksum);
if (memcmp(nerve, cksum, 16) == 0)
if (memcmp(nerve[isizecheck], cksum, 16) == 0)
{
found = true;
break;