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(svn r19679) -Fix: [NewGRF] make sure newgrfs can't overwrite sound effect properties from other newgrfs

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yexo
2010-04-20 05:52:51 +00:00
parent df4d8b3bc9
commit 92e36c87fd
3 changed files with 30 additions and 20 deletions
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26
src/newgrf.cpp
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@@ -2082,21 +2082,21 @@ static ChangeInfoResult SoundEffectChangeInfo(uint sid, int numinfo, int prop, B
return CIR_INVALID_ID;
}
for (int i = 0; i < numinfo; i++) {
SoundID sound = sid + i + _cur_grffile->sound_offset - ORIGINAL_SAMPLE_COUNT;
if (sid + numinfo - ORIGINAL_SAMPLE_COUNT >= _cur_grffile->num_sounds) {
grfmsg(1, "SoundEffectChangeInfo: Attemting to change undefined sound effect (%u), max (%u). Ignoring.", sid + numinfo, ORIGINAL_SAMPLE_COUNT + _cur_grffile->num_sounds);
return CIR_INVALID_ID;
}
if (sound >= GetNumSounds()) {
grfmsg(1, "SoundEffectChangeInfo: Sound %d not defined (max %d)", sound, GetNumSounds());
return CIR_INVALID_ID;
}
for (int i = 0; i < numinfo; i++) {
SoundEntry *sound = GetSound(sid + i + _cur_grffile->sound_offset - ORIGINAL_SAMPLE_COUNT);
switch (prop) {
case 0x08: // Relative volume
GetSound(sound)->volume = buf->ReadByte();
sound->volume = buf->ReadByte();
break;
case 0x09: // Priority
GetSound(sound)->priority = buf->ReadByte();
sound->priority = buf->ReadByte();
break;
case 0x0A: { // Override old sound
@@ -2105,11 +2105,10 @@ static ChangeInfoResult SoundEffectChangeInfo(uint sid, int numinfo, int prop, B
if (orig_sound >= ORIGINAL_SAMPLE_COUNT) {
grfmsg(1, "SoundEffectChangeInfo: Original sound %d not defined (max %d)", orig_sound, ORIGINAL_SAMPLE_COUNT);
} else {
SoundEntry *new_sound = GetSound(sound);
SoundEntry *old_sound = GetSound(orig_sound);
/* Literally copy the data of the new sound over the original */
*old_sound = *new_sound;
*old_sound = *sound;
}
} break;
@@ -5655,7 +5654,10 @@ static void GRFSound(ByteReader *buf)
_grf_data_blocks = num;
_grf_data_type = GDT_SOUND;
if (_cur_grffile->sound_offset == 0) _cur_grffile->sound_offset = GetNumSounds();
if (_cur_grffile->sound_offset == 0) {
_cur_grffile->sound_offset = GetNumSounds();
_cur_grffile->num_sounds = num;
}
}
/* Action 0x11 (SKIP) */
@@ -5683,7 +5685,7 @@ static void ImportGRFSound(ByteReader *buf)
return;
}
if (file->sound_offset + sound_id >= GetNumSounds()) {
if (sound_id >= file->num_sounds) {
grfmsg(1, "ImportGRFSound: Sound effect %d is invalid", sound_id);
return;
}