ShuriZma
/
BizHawk
mirror of https://github.com/TASEmulators/BizHawk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

(Actually) Fix DeltaSerializer's `GetDelta` 

fixes 2838a5412a
This commit is contained in:
CasualPokePlayer 2023-04-15 22:04:21 -07:00
parent 2838a5412a
commit 98afdb8993
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/BizHawk.Common/DeltaSerializer.cs
View File

@ -69,6 +69,8 @@ namespace BizHawk.Common
if (different > 0) // only not 0 if index == end immediately if (different > 0) // only not 0 if index == end immediately
{ {
different = index - blockStart - same;
if (same < 4) // we have different bytes, but we hit the end of the spans before the 8 limit, and we have less than what a same block will save if (same < 4) // we have different bytes, but we hit the end of the spans before the 8 limit, and we have less than what a same block will save
{ {
different += same; different += same;
@ -82,6 +84,8 @@ namespace BizHawk.Common
{ {
ret[retSize++] = (byte)(orignalAsBytes[i] ^ currentAsBytes[i]); ret[retSize++] = (byte)(orignalAsBytes[i] ^ currentAsBytes[i]);
} }
blockStart = index - same;
} }
if (same > 0) // same is 4-8, 8 indicates we hit the 8 same bytes threshold, 4-7 indicate hit end of span if (same > 0) // same is 4-8, 8 indicates we hit the 8 same bytes threshold, 4-7 indicate hit end of span
@ -91,10 +95,10 @@ namespace BizHawk.Common
while (index < end && orignalAsBytes[index] == currentAsBytes[index]) while (index < end && orignalAsBytes[index] == currentAsBytes[index])
{ {
index++; index++;
same++;
} }
} }
same = index - blockStart;
MemoryMarshal.Write(ret.Slice(retSize, 4), ref same); MemoryMarshal.Write(ret.Slice(retSize, 4), ref same);
retSize += 4; retSize += 4;
} }