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gmime-disposition.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Jeffrey Stedfast <fejj@ximian.com>
 *
 *  Copyright 2001 Ximian, Inc. (www.ximian.com)
 *
 *  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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */


#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <ctype.h>
#include <string.h>

#include "gmime-disposition.h"

#include <glib/gmessages.h>
#include <glib/gmem.h>
#include <glib/gstrfuncs.h>

static int
param_equal (gconstpointer v, gconstpointer v2)
{
      return g_strcasecmp ((const char *) v, (const char *) v2) == 0;
}

static guint
param_hash (gconstpointer key)
{
      const char *p = key;
      guint h = tolower (*p);
      
      if (h)
            for (p += 1; *p != '\0'; p++)
                  h = (h << 5) - h + tolower (*p);
      
      return h;
}


/**
 * g_mime_disposition_new:
 * @disposition: disposition header (and params)
 *
 * Creates a new GMimeDisposition object.
 *
 * Returns a new disposition object
 **/
GMimeDisposition *
g_mime_disposition_new (const char *disposition)
{
      GMimeDisposition *new;
      GMimeParam *param;
      const char *inptr;
      char *value;
      
      new = g_new (GMimeDisposition, 1);
      if (!disposition) {
            new->disposition = g_strdup (GMIME_DISPOSITION_ATTACHMENT);
            new->params = NULL;
            new->param_hash = NULL;
            
            return new;
      }
      
      /* get content disposition part */
      for (inptr = disposition; *inptr && *inptr != ';'; inptr++); /* find ; or \0 */
      value = g_strndup (disposition, (unsigned) (inptr - disposition));
      g_strstrip (value);
      
      new->disposition = value;
      
      /* parse the parameters, if any */
      if (*inptr++ == ';' && *inptr) {
            param = new->params = g_mime_param_new_from_string (inptr);
            new->param_hash = g_hash_table_new (param_hash, param_equal);
            while (param) {
                  g_hash_table_insert (new->param_hash, param->name, param);
                  param = param->next;
            }
      } else {
            new->params = NULL;
            new->param_hash = NULL;
      }
      
      return new;
}


/**
 * g_mime_disposition_destroy:
 * @disposition: disposition object
 *
 * Destroy the disposition object.
 **/
void
g_mime_disposition_destroy (GMimeDisposition *disposition)
{
      if (disposition) {
            g_free (disposition->disposition);
            if (disposition->params)
                  g_mime_param_destroy (disposition->params);
            if (disposition->param_hash)
                  g_hash_table_destroy (disposition->param_hash);
            g_free (disposition);
      }
}


/**
 * g_mime_disposition_set:
 * @disposition: disposition object
 * @value: disposition value
 *
 * Sets the disposition to @value which may be one of
 * GMIME_DISPOSITION_ATTACHMENT or GMIME_DISPOSITION_INLINE or, by your
 * choice, any other string which would indicate how the MIME part
 * should be displayed by the MUA.
 **/
void
g_mime_disposition_set (GMimeDisposition *disposition, const char *value)
{
      g_return_if_fail (disposition != NULL);
      g_return_if_fail (value != NULL);
      
      g_free (disposition->disposition);
      disposition->disposition = g_strdup (value);
}


/**
 * g_mime_disposition_get:
 * @disposition: disposition object
 *
 * Gets the disposition or %NULL on fail.
 *
 * Returns the disposition string which is probably one of
 * GMIME_DISPOSITION_ATTACHMENT or GMIME_DISPOSITION_INLINE.
 **/
const char *
g_mime_disposition_get (GMimeDisposition *disposition)
{
      g_return_val_if_fail (disposition != NULL, NULL);
      
      return disposition->disposition;
}


/**
 * g_mime_disposition_add_parameter:
 * @disposition: disposition object
 * @attribute: parameter name
 * @value: parameter value
 *
 * Adds a new parameter of name @name and value @value to the
 * disposition.
 **/
void
g_mime_disposition_add_parameter (GMimeDisposition *disposition, const char *attribute, const char *value)
{
      GMimeParam *param = NULL;
      
      g_return_if_fail (disposition != NULL);
      g_return_if_fail (attribute != NULL);
      g_return_if_fail (value != NULL);
      
      if (disposition->params) {
            param = g_hash_table_lookup (disposition->param_hash, attribute);
            if (param) {
                  g_free (param->value);
                  param->value = g_strdup (value);
            }
      } else {
            /* hash table may not be initialized */
            if (!disposition->param_hash)
                  disposition->param_hash = g_hash_table_new (param_hash, param_equal);
      }
      
      if (param == NULL) {
            param = g_mime_param_new (attribute, value);
            disposition->params = g_mime_param_append_param (disposition->params, param);
            g_hash_table_insert (disposition->param_hash, param->name, param);
      }
}


/**
 * g_mime_disposition_get_parameter:
 * @disposition: disposition object
 * @attribute: parameter name
 *
 * Gets the value of the parameter @attribute, or %NULL on fail.
 *
 * Returns the value of the parameter of name @attribute.
 **/
const char *
g_mime_disposition_get_parameter (GMimeDisposition *disposition, const char *attribute)
{
      GMimeParam *param;
      
      g_return_val_if_fail (disposition != NULL, NULL);
      g_return_val_if_fail (attribute != NULL, NULL);
      
      if (!disposition->param_hash)
            return NULL;
      
      param = g_hash_table_lookup (disposition->param_hash, attribute);
      
      if (param)
            return param->value;
      else
            return NULL;
}


/**
 * g_mime_disposition_header:
 * @disposition: disposition object
 * @fold: fold header if needed
 *
 * Allocates a string buffer containing the Content-Disposition header
 * represented by the disposition object @disposition.
 *
 * Returns a string containing the disposition header
 **/
char *
g_mime_disposition_header (GMimeDisposition *disposition, gboolean fold)
{
      GString *string;
      char *header, *buf;
      
      g_return_val_if_fail (disposition != NULL, NULL);
      
      /* we need to have this so wrapping is correct */
      string = g_string_new ("Content-Disposition: ");
      
      g_string_append (string, disposition->disposition);
      g_mime_param_write_to_string (disposition->params, fold, string);
      
      header = string->str;
      g_string_free (string, FALSE);
      
      buf = header + strlen ("Content-Disposition: ");
      memmove (header, buf, strlen (buf) + 1);
      
      return header;
}

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