metadata.c

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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 2
 * 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2005 Blender Foundation
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Austin Benesh. Ton Roosendaal.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <stdlib.h>
#include <string.h>

#include "BLI_blenlib.h"
#include "MEM_guardedalloc.h"

#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"

#include "IMB_metadata.h"



void IMB_metadata_free(struct ImBuf* img)
{
    ImMetaData *info;

    if (!img)
        return;
    if (!img->metadata) {
        return;
    }
    info = img->metadata;
    while (info) {
        ImMetaData* next = info->next;
        MEM_freeN(info->key);
        MEM_freeN(info->value);
        MEM_freeN(info);
        info = next;
    }
}

int IMB_metadata_get_field(struct ImBuf* img, const char* key, char* field, int len)
{
    ImMetaData *info;
    int retval = 0;

    if (!img)
        return 0;
    if (!img->metadata) {
        return 0;
    }
    info = img->metadata;
    while (info) {
        if (strcmp(key, info->key) == 0) {
            BLI_strncpy(field, info->value, len);
            retval = 1;
            break;
        }
        info = info->next;
    }
    return retval;
}

int IMB_metadata_add_field(struct ImBuf* img, const char* key, const char* field)
{
    ImMetaData *info;
    ImMetaData *last;

    if (!img)
        return 0;

    if (!img->metadata) {
        img->metadata = MEM_callocN(sizeof(ImMetaData), "ImMetaData");
        info = img->metadata;
    } else {
        info = img->metadata;
        last = info;
        while (info) {
            last = info;
            info = info->next;
        }
        info = MEM_callocN(sizeof(ImMetaData), "ImMetaData");
        last->next = info;
    }
    info->key = BLI_strdup(key);
    info->value = BLI_strdup(field);
    return 1;
}

int IMB_metadata_del_field(struct ImBuf *img, const char *key)
{
    ImMetaData *p, *p1;

    if ((!img) || (!img->metadata))
        return (0);

    p = img->metadata;
    p1 = NULL;
    while (p) {
        if (!strcmp (key, p->key)) {
            if (p1)
                p1->next = p->next;
            else
                img->metadata = p->next;

            MEM_freeN(p->key);
            MEM_freeN(p->value);
            MEM_freeN(p);
            return (1);
        }
        p1 = p;
        p = p->next;
    }
    return (0);
}

int IMB_metadata_change_field(struct ImBuf *img, const char *key, const char *field)
{
    ImMetaData *p;

    if (!img)
        return (0);

    if (!img->metadata)
        return (IMB_metadata_add_field (img, key, field));

    p = img->metadata;
    while (p) {
        if (!strcmp (key, p->key)) {
            MEM_freeN (p->value);
            p->value = BLI_strdup (field);
            return (1);
        }
        p = p->next;
    }

    return (IMB_metadata_add_field (img, key, field));
}