`bpak_bsdiff` — bsdiff¶

The BPAK bsdiff module, bsdiff is used to generate a binary patch between two different, binary, input files. This produces patches without any compression, which is not meningful but BPAK provides this API anyway to allow the user a choice of compression algorithm.

Source code: include/bpak/bsdiff.h, lib/bsdiff.c

BPAK - Bit Packer

SPDX-License-Identifier: BSD-3-Clause

Functions

int bpak_bsdiff_init(struct bpak_bsdiff_context *ctx, uint8_t *origin_data, size_t origin_length, uint8_t *new_data, size_t new_length, bpak_io_t write_output, off_t output_offset, enum bpak_compression compression, void *user_priv)¶

Initialize a bsdiff context

Parameters:

ctx – [in] The bsdiff context
origin_data – [in] pointer to origin/source data
origin_length – [in] Length of origin data
new_data – [in] New, or target data
new_length – [in] Length of target data
write_output – [in] I/O callback for writing output data
user_priv – [in] Priv context for i/o callback

Returns:

BPAK_OK on success or a negative number

ssize_t bpak_bsdiff(struct bpak_bsdiff_context *ctx)¶

Perform the diff process

Parameters:: ctx – [in] The bsdiff context
Returns:: size out output patch on success or a negative number

void bpak_bsdiff_free(struct bpak_bsdiff_context *ctx)¶

Free the diff context

Parameters:: ctx – [in] The bsdiff context

struct bpak_bsdiff_context¶

Public Members

int origin_fd¶

uint8_t *origin_data¶

size_t origin_length¶

int new_fd¶

uint8_t *new_data¶

size_t new_length¶

int64_t *suffix_array¶

size_t suffix_array_size¶

int64_t scan¶

int64_t len¶

int64_t pos¶

int64_t last_scan¶

int64_t last_pos¶

int64_t last_offset¶

int64_t scsc¶

bpak_io_t write_output¶

off_t output_offset¶

size_t output_pos¶

enum bpak_compression compression¶

void *compressor_priv¶

void *user_priv¶

bpak_bsdiff — bsdiff¶

`bpak_bsdiff` — bsdiff¶