common/fp.h

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//
//      cook - file construction tool
//      Copyright (C) 1994, 2003-2006, 2008 Peter Miller.
//
//      This program is free software; you can redistribute it and/or modify
//      it under the terms of the GNU General Public License as published by
//      the Free Software Foundation; either version 3 of the License, or
//      (at your option) any later version.
//
//      This program is distributed in the hope that it will be useful,
//      but WITHOUT ANY WARRANTY; without even the implied warranty of
//      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//      GNU General Public License for more details.
//
//      You should have received a copy of the GNU General Public License
//      along with this program. If not, see
//      <http://www.gnu.org/licenses/>.
//

#ifndef COMMON_FP_H
#define COMMON_FP_H

#include <common/ac/stddef.h>

struct fingerprint_methods_ty; // forward

#define FINGERPRINT_BASE_CLASS \
        struct fingerprint_methods_ty *method;

struct fingerprint_ty
{
        FINGERPRINT_BASE_CLASS
};

struct fingerprint_methods_ty
{
    long            size;
    const char      *name;
    void            (*constructor)(fingerprint_ty *);
    void            (*destructor)(fingerprint_ty *);
    void            (*addn)(fingerprint_ty *, unsigned char *, size_t);
    int             (*hash)(fingerprint_ty *, unsigned char *);
    void            (*sum)(fingerprint_ty *, char *, size_t);
};

fingerprint_ty *fingerprint_new(fingerprint_methods_ty *);
void fingerprint_delete(fingerprint_ty *);
void fingerprint_add(fingerprint_ty *, int);
int fingerprint_file_hash(fingerprint_ty *, const char *, unsigned char *);
int fingerprint_file_sum(fingerprint_ty *, const char *, char *, size_t);

#define fingerprint_addn(p, s, n) \
        (p)->method->addn((p), (s), (n))
#define fingerprint_hash(p, s) \
        (p)->method->hash((p), (s))
#define fingerprint_sum(p, s, len) \
        (p)->method->sum((p), (s), (len))

#endif // COMMON_FP_H