/* Chrysalide - Outil d'analyse de fichiers binaires
 * szbin.h - prototypes pour une manipulation de données accompagnées d'une taille
 *
 * Copyright (C) 2024 Cyrille Bagard
 *
 *  This file is part of Chrysalide.
 *
 *  Chrysalide 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.
 *
 *  Chrysalide 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 Chrysalide.  If not, see <http://www.gnu.org/licenses/>.
 */


#ifndef _COMMON_SZBIN_H
#define _COMMON_SZBIN_H


#include <malloc.h>
#include <string.h>



/* Structure associant données et taille */
typedef struct _sized_binary_t
{
    union {

        const char *static_data;        /* Données non modifiées       */
        char *data;                     /* Chaîne de caractères        */

    };

    size_t size;                        /* Taille correspondante       */

} sized_binary_t;


#define init_sized_binary(sb)           \
    do                                  \
    {                                   \
        (sb)->data = NULL;              \
        (sb)->size = 0;                 \
    }                                   \
    while (0)


#define setup_sized_binary(sb, s)       \
    do                                  \
    {                                   \
        (sb)->data = malloc(s);         \
        (sb)->size = s;                 \
    }                                   \
    while (0)


#define dup_into_sized_binary(sb, d, s) \
    do                                  \
    {                                   \
        setup_sized_binary(sb, s);      \
        memcpy((sb)->data, d, s);       \
    }                                   \
    while (0)


#define exit_sized_binary(sb)           \
    do                                  \
    {                                   \
        if ((sb)->data != NULL)         \
        {                               \
            free((sb)->data);           \
            init_sized_binary(sb);      \
        }                               \
    }                                   \
    while (0)



#endif  /* _COMMON_SZBIN_H */