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-fixed the file validity checks in MapData::GetChecksum.

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They need to be done per lump, because MapData::Seek can alter the FileReader being used for a specific lump. Even worse, the FileReader will be NULL when the function as it was is called for a map inside a Zip-file.
This commit is contained in:
Christoph Oelckers 2014-09-12 20:59:23 +02:00
parent 5e34b78451
commit a2c81f1ca9
1 changed files with 22 additions and 25 deletions
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17
src/p_setup.cpp
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@ -537,34 +537,31 @@ void MapData::GetChecksum(BYTE cksum[16])
{ {
MD5Context md5; MD5Context md5;
if (file != NULL)
{
if (isText) if (isText)
{ {
Seek(ML_TEXTMAP); Seek(ML_TEXTMAP);
md5.Update(file, Size(ML_TEXTMAP)); if (file != NULL) md5.Update(file, Size(ML_TEXTMAP));
} }
else else
{ {
if (Size(ML_LABEL) != 0) if (Size(ML_LABEL) != 0)
{ {
Seek(ML_LABEL); Seek(ML_LABEL);
md5.Update(file, Size(ML_LABEL)); if (file != NULL) md5.Update(file, Size(ML_LABEL));
} }
Seek(ML_THINGS); Seek(ML_THINGS);
md5.Update(file, Size(ML_THINGS)); if (file != NULL) md5.Update(file, Size(ML_THINGS));
Seek(ML_LINEDEFS); Seek(ML_LINEDEFS);
md5.Update(file, Size(ML_LINEDEFS)); if (file != NULL) md5.Update(file, Size(ML_LINEDEFS));
Seek(ML_SIDEDEFS); Seek(ML_SIDEDEFS);
md5.Update(file, Size(ML_SIDEDEFS)); if (file != NULL) md5.Update(file, Size(ML_SIDEDEFS));
Seek(ML_SECTORS); Seek(ML_SECTORS);
md5.Update(file, Size(ML_SECTORS)); if (file != NULL) md5.Update(file, Size(ML_SECTORS));
} }
if (HasBehavior) if (HasBehavior)
{ {
Seek(ML_BEHAVIOR); Seek(ML_BEHAVIOR);
md5.Update(file, Size(ML_BEHAVIOR)); if (file != NULL) md5.Update(file, Size(ML_BEHAVIOR));
}
} }
md5.Final(cksum); md5.Final(cksum);
} }