FileCDC/cdc.h at master · baixiangcpp/FileCDC · GitHub

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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

#ifndef _CDC_H
#define _CDC_H

#include <glib.h>
#include <stdint.h>

#define CHECKSUM_LENGTH 20

#ifndef O_BINARY
#define O_BINARY 0
#endif

struct _CDCFileDescriptor;
struct _CDCDescriptor;


typedef int (*WriteblockFunc)(struct _CDCDescriptor *chunk_descr,
                              uint8_t *checksum);

/* define chunk file header and block entry */
typedef struct _CDCFileDescriptor {
    uint32_t block_min_sz;
    uint32_t block_max_sz;
    uint32_t block_sz;
    uint64_t file_size;

    uint32_t block_nr;
    uint8_t *blk_sha1s;
    int max_block_nr;
    uint8_t  file_sum[CHECKSUM_LENGTH];

    WriteblockFunc write_block;

} CDCFileDescriptor;

typedef struct _CDCDescriptor {
    uint64_t offset;
    uint32_t len;
    uint8_t  checksum[CHECKSUM_LENGTH];
    char    *block_buf;
    int result;
} CDCDescriptor;

int file_chunk_cdc(int fd_src,
                   CDCFileDescriptor *file_descr);

int filename_chunk_cdc(const char *filename,
                       CDCFileDescriptor *file_descr);

void cdc_init ();

void cdc_work(const char* filename);

#endif