2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2003 Hiroyuki Yamamoto
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 #define MAX_LINELEN 76
27 #define IS_LBREAK(p) \
28 (*(p) == '\0' || *(p) == '\n' || (*(p) == '\r' && *((p) + 1) == '\n'))
30 #define SOFT_LBREAK_IF_REQUIRED(n) \
31 if (len + (n) > MAX_LINELEN || \
32 (len + (n) == MAX_LINELEN && (!IS_LBREAK(inp + 1)))) { \
38 void qp_encode_line(gchar *out, const guchar *in)
40 const guchar *inp = in;
45 while (*inp != '\0') {
54 } else if (ch == '\t' || ch == ' ') {
55 if (IS_LBREAK(inp + 1)) {
56 SOFT_LBREAK_IF_REQUIRED(3);
58 get_hex_str(outp, ch);
63 SOFT_LBREAK_IF_REQUIRED(1);
67 } else if ((ch >= 33 && ch <= 60) || (ch >= 62 && ch <= 126)) {
68 SOFT_LBREAK_IF_REQUIRED(1);
72 SOFT_LBREAK_IF_REQUIRED(3);
74 get_hex_str(outp, ch);
87 gint qp_decode_line(gchar *str)
89 gchar *inp = str, *outp = str;
91 while (*inp != '\0') {
93 if (inp[1] && inp[2] &&
94 get_hex_value((guchar *)outp, inp[1], inp[2])
97 } else if (inp[1] == '\0' || g_ascii_isspace(inp[1])) {
101 /* broken QP string */
115 gint qp_decode_q_encoding(guchar *out, const gchar *in, gint inlen)
117 const gchar *inp = in;
123 while (inp - in < inlen && *inp != '\0') {
124 if (*inp == '=' && inp + 3 - in <= inlen) {
125 if (get_hex_value(outp, inp[1], inp[2]) == TRUE) {
130 } else if (*inp == '_') {
144 gint qp_get_q_encoding_len(const guchar *str)
146 const guchar *inp = str;
149 while (*inp != '\0') {
152 else if (*inp == '=' || *inp == '?' || *inp == '_' ||
153 *inp < 32 || *inp > 127 || g_ascii_isspace(*inp))
164 void qp_q_encode(gchar *out, const guchar *in)
166 const guchar *inp = in;
169 while (*inp != '\0') {
172 else if (*inp == '=' || *inp == '?' || *inp == '_' ||
173 *inp < 32 || *inp > 127 || g_ascii_isspace(*inp)) {
175 get_hex_str(outp, *inp);