metadata.c

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/*
 * $Id: metadata.c 35239 2011-02-27 20:23:21Z jesterking $
 *
 * ***** 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));
}