https://github.com/itotaljustice/libpatch

simple patcher for ips, ups and bps files! (written in c99)
https://github.com/itotaljustice/libpatch

bps c99 ips patch ups

Last synced: about 2 months ago
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simple patcher for ips, ups and bps files! (written in c99)

• Host: GitHub
• URL: https://github.com/itotaljustice/libpatch
• Owner: ITotalJustice
• License: zlib
• Created: 2022-07-13T02:11:40.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2024-10-26T21:58:32.000Z (about 2 months ago)
• Last Synced: 2024-10-26T23:30:50.401Z (about 2 months ago)
• Topics: bps, c99, ips, patch, ups
• Language: C
• Homepage:
• Size: 29.3 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# libpatch

simple patcher for ips, ups and bps files! (written in c99).

NOTE: this does not current support creating patches! only applying them

---

## using

add this to your `CMakeLists.txt`

```cmake

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.

```c

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;

}

```

---

## thanks

- 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/