Tiny VCDIFF

Decoder for interleaved VCDIFF deltas. More...

Detailed Description

Decoder for interleaved VCDIFF deltas.

Introduction

tiny-vcdiff is a decoder for binary delta files that have been generated by open-vcdiff in the interleaved format.

Usage

Every delta requires a source (the known data) and a target (the reconstructed data). This implementation provides backends for the Memory Technology Device and Virtual File System (VFS) layer storage drivers.

Example

The example down below uses a Memory Technology Device device as known source data and writes the resulting target data into a Virtual File System (VFS) layer file.

#include "vcdiff.h"
#include "vcdiff_mtd.h"
#include "vcdiff_vfs.h"
 
int apply_delta (const uint8_t *data, size_t data_len,
                 mtd_dev_t *source_mtd,
                 int traget_fd)
{
    int rc;
    vcdiff_t vcdiff;
    vcdiff_init(&vcdiff);
 
    /* make sure source_mtd is already powered on */
    vcdiff_mtd_t source = VCDIFF_MTD_INIT(source_mtd);
    vcdiff_set_source_driver(&vcdiff, &vcdiff_mtd_driver, &source);
 
    /* make sure the vfs file is already opened for writing */
    vcdiff_vfs_t target = VCDIFF_VFS_INIT(fd_target);
    vcdiff_set_target_driver(&vcdiff, &vcdiff_vfs_driver, &target);
 
    rc = vcdiff_apply_delta(&vcdiff, data, data_len);
    if (rc != 0) {
        return rc;
    }
 
    rc = vcdiff_finish(&vcdiff);
    return rc;
}

License

Licensed under MIT.

See also

https://github.com/jue89/tiny-vcdiff.git

Files
file	vcdiff_mtd.h
file	vcdiff_vfs.h