simple patcher for ips, ups and bps files! (written in c99).
NOTE: this does not current support creating patches! only applying them
add this to your CMakeLists.txt
include(FetchContent)
FetchContent_Declare(patch
GIT_REPOSITORY https://github.com/ITotalJustice/libpatch.git
GIT_TAG master
)
FetchContent_MakeAvailable(patch)
target_link_libraries(your_exe PRIVATE patch)an example of how it would look in your code.
uint8_t* apply_patch(
const uint8_t* src_data, size_t src_size,
const uint8_t* patch_data, size_t patch_size,
size_t* out_size
) {
enum PatchType type;
if (PatchError_OK != patch_get_type(&type, patch_data, patch_size))
{
return NULL;
}
if (PatchError_OK != patch_get_size(type, out_size, src_size, patch_data, patch_size))
{
return NULL;
}
uint8_t* out = malloc(out_size);
if (!out)
{
return NULL
}
if (PatchError_OK != patch_apply(type, out, out_size, src_data, src_size, patch_data, patch_size))
{
free(out);
return NULL;
}
// patch worked, out is now pointing to allocated data.
// remember to call free when done!
return out;
}- ips spec https://zerosoft.zophar.net/ips.php
- ups spec by near https://www.romhacking.net/documents/392/
- bps spec by near https://www.romhacking.net/documents/746/