exif-log.c

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/* exif-log.c
 *
 * Copyright (c) 2004 Lutz Mueller <lutz@users.sourceforge.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301  USA.
 */

#include <config.h>

#include <libexif/exif-log.h>
#include <libexif/i18n.h>

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

struct _ExifLog {
        unsigned int ref_count;

        ExifLogFunc func;
        void *data;

        ExifMem *mem;
};

static const struct {
        ExifLogCode code;
        const char *title;
        const char *message;
} codes[] = {
        { EXIF_LOG_CODE_DEBUG, N_("Debugging information"),
          N_("Debugging information is available.") },
        { EXIF_LOG_CODE_NO_MEMORY, N_("Not enough memory"),
          N_("The system cannot provide enough memory.") },
        { EXIF_LOG_CODE_CORRUPT_DATA, N_("Corrupt data"),
          N_("The data provided does not follow the specification.") },
        { 0, NULL, NULL }
};

const char *
exif_log_code_get_title (ExifLogCode code)
{
        unsigned int i;

        for (i = 0; codes[i].title; i++) if (codes[i].code == code) break;
        return _(codes[i].title);
}

const char *
exif_log_code_get_message (ExifLogCode code)
{
        unsigned int i;

        for (i = 0; codes[i].message; i++) if (codes[i].code == code) break;
        return _(codes[i].message);
}

ExifLog *
exif_log_new_mem (ExifMem *mem)
{
        ExifLog *log;

        log = exif_mem_alloc (mem, sizeof (ExifLog));
        if (!log) return NULL;
        log->ref_count = 1;

        log->mem = mem;
        exif_mem_ref (mem);

        return log;
}

ExifLog *
exif_log_new (void)
{
        ExifMem *mem = exif_mem_new_default ();
        ExifLog *log = exif_log_new_mem (mem);

        exif_mem_unref (mem);

        return log;
}

void
exif_log_ref (ExifLog *log)
{
        if (!log) return;
        log->ref_count++;
}

void
exif_log_unref (ExifLog *log)
{
        if (!log) return;
        if (log->ref_count > 0) log->ref_count--;
        if (!log->ref_count) exif_log_free (log);
}

void
exif_log_free (ExifLog *log)
{
        ExifMem *mem = log ? log->mem : NULL;

        if (!log) return;

        exif_mem_free (mem, log);
        exif_mem_unref (mem);
}

void
exif_log_set_func (ExifLog *log, ExifLogFunc func, void *data)
{
        if (!log) return;
        log->func = func;
        log->data = data;
}

#ifdef NO_VERBOSE_TAG_STRINGS
/* exif_log forms part of the API and can't be commented away */
#undef exif_log
#endif
void
exif_log (ExifLog *log, ExifLogCode code, const char *domain,
          const char *format, ...)
{
        va_list args;

        va_start (args, format);
        exif_logv (log, code, domain, format, args);
        va_end (args);
}

void
exif_logv (ExifLog *log, ExifLogCode code, const char *domain,
           const char *format, va_list args)
{
        if (!log) return;
        if (!log->func) return;
        log->func (log, code, domain, format, args, log->data);
}

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