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More optimizations

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Alcaro
2016-12-25 20:12:44 +01:00
parent d8e4ec5fb7
commit bee5465b02
4 changed files with 89 additions and 25 deletions
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13
patch/ips.cpp
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@@ -92,11 +92,12 @@ exit:
//There are no known cases where LIPS wins over this.
result create(array<byte> source, arrayview<byte> target, array<byte>& patchmem)
result create(array<byte> sourcea, arrayview<byte> target, array<byte>& patchmem)
{
int truesourcelen=source.size();
int truesourcelen=sourcea.size();
int targetlen=target.size();
source.resize(target.size());
sourcea.resize(target.size());
arrayview<byte> source = sourcea;
//const unsigned char * source=sourcemem.ptr();
//const unsigned char * target=targetmem.ptr();
@@ -118,7 +119,9 @@ result create(array<byte> source, arrayview<byte> target, array<byte>& patchmem)
while (offset<targetlen)
{
//skip unchanged bytes
while (offset<targetlen && source[offset]==target[offset]) offset++;
offset += memcmp_d(source.slice(offset, targetlen-offset).ptr(),
target.slice(offset, targetlen-offset).ptr(),
targetlen-offset);
//how many bytes to edit
int thislen=0;
@@ -215,7 +218,7 @@ result create(array<byte> source, arrayview<byte> target, array<byte>& patchmem)
//don't copy unchanged bytes at the end of a block
if (offset+thislen!=targetlen)
{
while (target[offset+thislen-1]==source[offset+thislen-1])
while (thislen>1 && target[offset+thislen-1]==source[offset+thislen-1])
{
thislen--;
}