/* -*- mode: C; c-file-style: "gnu" -*- */

/* xdgmimealias.c: Private file.  Datastructure for storing the aliases.

 *

 * More info can be found at http://www.freedesktop.org/standards/

 *

 * Copyright (C) 2004  Red Hat, Inc.

 * Copyright (C) 2004  Matthias Clasen <mclasen@redhat.com>

 *

 * SPDX-License-Identifier: LGPL-2.1-or-later or AFL-2.0

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include "xdgmimealias.h"

#include "xdgmimeint.h"

#include <stdlib.h>

#include <stdio.h>

#include <assert.h>

#include <string.h>

#include <fnmatch.h>

#ifndef FALSE

#define FALSE (0)

#endif

#ifndef TRUE

#define TRUE  (!FALSE)

#endif

typedef struct XdgAlias XdgAlias;

struct XdgAlias 

{

  char *alias;

  char *mime_type;

};

struct XdgAliasList

{

  struct XdgAlias *aliases;

  int n_aliases;

};

XdgAliasList *

_xdg_mime_alias_list_new (void)

{

  XdgAliasList *list;

  list = malloc (sizeof (XdgAliasList));

  list->aliases = NULL;

  list->n_aliases = 0;

  return list;

}

void         

_xdg_mime_alias_list_free (XdgAliasList *list)

{

  int i;

  if (list->aliases)

    {

      for (i = 0; i < list->n_aliases; i++)

  {

    free (list->aliases[i].alias);

    free (list->aliases[i].mime_type);

  }

      free (list->aliases);

    }

  free (list);

}

static int

alias_entry_cmp (const void *v1, const void *v2)

{

  return strcmp (((XdgAlias *)v1)->alias, ((XdgAlias *)v2)->alias);

}

const char  *

_xdg_mime_alias_list_lookup (XdgAliasList *list,

           const char   *alias)

{

  XdgAlias *entry;

  XdgAlias key;

  if (list->n_aliases > 0)

    {

      key.alias = (char *)alias;

      key.mime_type = NULL;

      entry = bsearch (&key, list->aliases, list->n_aliases,

           sizeof (XdgAlias), alias_entry_cmp);

      if (entry)

        return entry->mime_type;

    }

  return NULL;

}

void

_xdg_mime_alias_read_from_file (XdgAliasList *list,

        const char   *file_name)

{

  FILE *file;

  char line[255];

  int alloc;

  file = fopen (file_name, "r");

  if (file == NULL)

    return;

  /* FIXME: Not UTF-8 safe.  Doesn't work if lines are greater than 255 chars.

   * Blah */

  alloc = list->n_aliases + 16;

  list->aliases = realloc (list->aliases, alloc * sizeof (XdgAlias));

  while (fgets (line, 255, file) != NULL)

    {

      char *sep;

      if (line[0] == '#')

  continue;

      sep = strchr (line, ' ');

      if (sep == NULL)

  continue;

      *(sep++) = '\000';

      sep[strlen (sep) -1] = '\000';

      if (list->n_aliases == alloc)

  {

    alloc <<= 1;

    list->aliases = realloc (list->aliases, 

           alloc * sizeof (XdgAlias));

  }

      list->aliases[list->n_aliases].alias = strdup (line);

      list->aliases[list->n_aliases].mime_type = strdup (sep);

      list->n_aliases++;

    }

  list->aliases = realloc (list->aliases, 

         list->n_aliases * sizeof (XdgAlias));

  fclose (file);  

  if (list->n_aliases > 1)

    qsort (list->aliases, list->n_aliases, 

           sizeof (XdgAlias), alias_entry_cmp);

}

void

_xdg_mime_alias_list_dump (XdgAliasList *list)

{

  int i;

  if (list->aliases)

    {

      for (i = 0; i < list->n_aliases; i++)

  {

    printf ("%s %s\n", 

      list->aliases[i].alias,

      list->aliases[i].mime_type);

  }

    }

}