133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
/*
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* Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
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* Copyright (C) 1999-2003 Hiroyuki Yamamoto
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <string.h>
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#include <ctype.h>
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#include "codeconv.h"
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#include "base64.h"
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#include "quoted-printable.h"
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#define ENCODED_WORD_BEGIN "=?"
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#define ENCODED_WORD_END "?="
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/* Decodes headers based on RFC2045 and RFC2047. */
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void unmime_header(gchar *out, const gchar *str)
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{
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const gchar *p = str;
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gchar *outp = out;
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const gchar *eword_begin_p, *encoding_begin_p, *text_begin_p,
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*eword_end_p;
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gchar charset[32];
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gchar encoding;
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gchar *conv_str;
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gint len;
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while (*p != '\0') {
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gchar *decoded_text = NULL;
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eword_begin_p = strstr(p, ENCODED_WORD_BEGIN);
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if (!eword_begin_p) {
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strcpy(outp, p);
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return;
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}
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encoding_begin_p = strchr(eword_begin_p + 2, '?');
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if (!encoding_begin_p) {
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strcpy(outp, p);
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return;
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}
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text_begin_p = strchr(encoding_begin_p + 1, '?');
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if (!text_begin_p) {
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strcpy(outp, p);
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return;
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}
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eword_end_p = strstr(text_begin_p + 1, ENCODED_WORD_END);
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if (!eword_end_p) {
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strcpy(outp, p);
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return;
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}
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if (p == str) {
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memcpy(outp, p, eword_begin_p - p);
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outp += eword_begin_p - p;
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p = eword_begin_p;
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} else {
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/* ignore spaces between encoded words */
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const gchar *sp;
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for (sp = p; sp < eword_begin_p; sp++) {
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if (!isspace(*(const guchar *)sp)) {
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memcpy(outp, p, eword_begin_p - p);
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outp += eword_begin_p - p;
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p = eword_begin_p;
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break;
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}
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}
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}
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len = MIN(sizeof(charset) - 1,
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encoding_begin_p - (eword_begin_p + 2));
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memcpy(charset, eword_begin_p + 2, len);
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charset[len] = '\0';
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encoding = toupper(*(encoding_begin_p + 1));
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if (encoding == 'B') {
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decoded_text = g_malloc
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(eword_end_p - (text_begin_p + 1) + 1);
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len = base64_decode(decoded_text, text_begin_p + 1,
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eword_end_p - (text_begin_p + 1));
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decoded_text[len] = '\0';
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} else if (encoding == 'Q') {
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decoded_text = g_malloc
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(eword_end_p - (text_begin_p + 1) + 1);
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len = qp_decode_q_encoding
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(decoded_text, text_begin_p + 1,
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eword_end_p - (text_begin_p + 1));
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} else {
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memcpy(outp, p, eword_end_p + 2 - p);
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outp += eword_end_p + 2 - p;
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p = eword_end_p + 2;
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continue;
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}
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/* convert to locale encoding */
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conv_str = conv_codeset_strdup(decoded_text, charset, CS_UTF_8);
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if (conv_str) {
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len = strlen(conv_str);
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memcpy(outp, conv_str, len);
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g_free(conv_str);
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} else {
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len = strlen(decoded_text);
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conv_localetodisp(outp, len + 1, decoded_text);
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}
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outp += len;
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g_free(decoded_text);
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p = eword_end_p + 2;
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}
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*outp = '\0';
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}
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