path: root/camel/gmime-utils.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* mime-utils.c : misc utilities for mime  */

/* 
 *
 * Copyright (C) 1999 Bertrand Guiheneuf <Bertrand.Guiheneuf@inria.fr> .
 *
 * 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 Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

#include <config.h>
#include "gmime-utils.h"
#include "string-utils.h"
#include "camel-log.h"
#include "camel-stream.h"

void
gmime_write_header_pair_to_stream (CamelStream *stream, const gchar* name, const gchar *value)
{

    gchar *strtmp;
    guint len;
    CAMEL_LOG_FULL_DEBUG ( "gmime_write_header_pair_to_stream:: Entering\n");
    g_assert(name);
#warning use g_strdup_printf instead
 
    if (!value) return;
    len = strlen (name) + strlen (value) +4;
    /* 4 is for ": " and "\n\0" */
    strtmp = g_new (gchar, len);
    sprintf (strtmp, "%s: %s\n", name, value);
    
    camel_stream_write (stream, strtmp, len);
    CAMEL_LOG_FULL_DEBUG ( "gmime_write_header_pair_to_stream:\n  writing %s\n", strtmp);
    
    g_free (strtmp);
    CAMEL_LOG_FULL_DEBUG ( "gmime_write_header_pair_to_stream:: Leaving\n");

}


static void
_write_one_header_to_stream (gpointer key, gpointer value, gpointer user_data)
{
    gchar *header_name = (gchar *)key;
    gchar *header_value = (gchar *)value;
    CamelStream *stream = (CamelStream *)user_data;

    CAMEL_LOG_FULL_DEBUG ( "_write_one_header_to_stream:: Entering\n");
    if ((header_name) && (header_value))
        gmime_write_header_pair_to_stream (stream, header_name, header_value);      
    CAMEL_LOG_FULL_DEBUG ( "_write_one_header_to_stream:: Leaving\n");
}

void 
write_header_table_to_stream (CamelStream *stream, GHashTable *header_table)
{
    CAMEL_LOG_FULL_DEBUG ( "write_header_table_to_stream:: Entering\n");
    g_hash_table_foreach (header_table, 
                  _write_one_header_to_stream, 
                  (gpointer)stream);
    CAMEL_LOG_FULL_DEBUG ( "write_header_table_to_stream:: Leaving\n");
}


void 
write_header_with_glist_to_stream (CamelStream *stream, const gchar *header_name, GList *header_values, const gchar *separator)
{
    
    gchar *current;

    CAMEL_LOG_FULL_DEBUG ( "write_header_with_glist_to_stream:: entering\n");
    if ( (header_name) && (header_values) )
        {
            gboolean first;
            
            camel_stream_write (stream, header_name, strlen (header_name) );
            camel_stream_write (stream, ": ", 2);
            first = TRUE;
            while (header_values) {
                current = (gchar *)header_values->data;
                if (current) {
                    if (!first) camel_stream_write_string (stream, separator);
                    else first = FALSE;
                    camel_stream_write (stream, current, strlen (current));
                }
                header_values = g_list_next(header_values);
            }
            camel_stream_write (stream, "\n", 1);
        }
    CAMEL_LOG_FULL_DEBUG ( "write_header_with_glist_to_stream:: leaving\n");
    
}   





/* * * * * * * * * * * */
/* scanning functions  */

static void
_store_header_pair_from_string (GHashTable *header_table, gchar *header_line)
{
    gchar dich_result;
    gchar *header_name, *header_value;
    
    CAMEL_LOG_FULL_DEBUG ( "_store_header_pair_from_string:: Entering\n");
    g_assert (header_table);
    g_assert (header_line);
    if (header_line) {
        dich_result = string_dichotomy ( header_line, ':', 
                           &header_name, &header_value,
                           STRING_DICHOTOMY_NONE);
        if (dich_result != 'o')
            CAMEL_LOG_WARNING (
                  "store_header_pair_from_string : dichotomy result is %c"
                  "header line is :\n--\n%s\n--\n");    
        else {
            string_trim (header_value, " \t",
                     STRING_TRIM_STRIP_LEADING | STRING_TRIM_STRIP_TRAILING);
            g_hash_table_insert (header_table, header_name, header_value);
        }
    }
    CAMEL_LOG_FULL_DEBUG ( "_store_header_pair_from_string:: Leaving\n");
    
}


    
        
GHashTable *
get_header_table_from_stream (CamelStream *stream)
{
#warning Correct Lazy Implementation 
    /* should not use GString. */
    /* should read the header line by line */
    /* and not char by char */
    gchar next_char;

    gboolean crlf = FALSE;
    gboolean end_of_header_line = FALSE;
    gboolean end_of_headers = FALSE;
    gboolean end_of_file = FALSE;
    GString *header_line=NULL;
    gchar *str_header_line;
    GHashTable *header_table;
    gint nb_char_read;

#warning Correct a bug here. Should use return value of camel_stream_read instead of looking for next_char!=-1
    CAMEL_LOG_FULL_DEBUG ( "gmime-utils:: Entering get_header_table_from_stream\n");
    header_table = g_hash_table_new (g_str_hash, g_str_equal);
    nb_char_read = camel_stream_read (stream, &next_char, 1);
    do {
        header_line = g_string_new ("");
        end_of_header_line = FALSE;
        crlf = FALSE;
        
        /* read a whole header line */
        do {
            if (nb_char_read>0) {
                switch (next_char) {
                    
                case '\n': /* a blank line means end of headers */
                    if (crlf) {
                        end_of_headers=TRUE;
                        end_of_header_line = TRUE;
                    }
                    else crlf = TRUE;
                    break;
                case ' ':
                case '\t':
                    if (crlf) {
                        crlf = FALSE; 
                        next_char = ' ';
                    }
                    
                default:
                    if (!crlf) header_line = g_string_append_c (header_line, next_char);
                    else end_of_header_line = TRUE;
                }
            } else {
                end_of_file=TRUE;
                end_of_header_line = TRUE;
            }
            /* if we have read a whole header line, we have also read
               the first character of the next line to be sure the 
               crlf was not followed by a space or a tab char */
            if (!end_of_header_line) nb_char_read = camel_stream_read (stream, &next_char, 1);

        } while ( !end_of_header_line );
        if ( strlen(header_line->str) ) {
            str_header_line = g_strdup (header_line->str);
            _store_header_pair_from_string (header_table, str_header_line);         
        }
        g_string_free (header_line, FALSE);

    } while ( (!end_of_headers) && (!end_of_file) );
    
    CAMEL_LOG_FULL_DEBUG ( "gmime-utils:: Leaving get_header_table_from_stream\n");
    return header_table;
}
        
        
gchar *
gmime_read_line_from_stream (CamelStream *stream)
{
    GString *new_line;
    gchar *result;
    gchar next_char;
    gboolean end_of_line = FALSE;
    gboolean end_of_stream = FALSE;
    gint nb_char_read;

    new_line = g_string_new ("");
    do {
        nb_char_read = camel_stream_read (stream, &next_char, 1);
        if (nb_char_read>0) {
            switch (next_char) {
            case '\n':              
                end_of_line = TRUE;
                /*  g_string_append_c (new_line, next_char); */
                break;
            default:
                g_string_append_c (new_line, next_char);
            }
        } else end_of_stream = TRUE;
    } while (!end_of_line && !end_of_stream);

    if (!end_of_stream)
        result = g_strdup (new_line->str);
    else result=NULL;
    g_string_free (new_line, TRUE);
    return result;
}