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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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(outp, inp[1], inp[2]) == TRUE) {
96 } else if (inp[1] == '\0' || isspace((guchar)inp[1])) {
100 /* broken QP string */
114 gint qp_decode_q_encoding(guchar *out, const gchar *in, gint inlen)
116 const gchar *inp = in;
122 while (inp - in < inlen && *inp != '\0') {
123 if (*inp == '=' && inp + 3 - in <= inlen) {
124 if (get_hex_value(outp, inp[1], inp[2]) == TRUE) {
129 } else if (*inp == '_') {
143 gint qp_get_q_encoding_len(const guchar *str)
145 const guchar *inp = str;
148 while (*inp != '\0') {
151 else if (*inp == '=' || *inp == '?' || *inp == '_' ||
152 *inp < 32 || *inp > 127 || isspace(*inp))
163 void qp_q_encode(gchar *out, const guchar *in)
165 const guchar *inp = in;
168 while (*inp != '\0') {
171 else if (*inp == '=' || *inp == '?' || *inp == '_' ||
172 *inp < 32 || *inp > 127 || isspace(*inp)) {
174 get_hex_str(outp, *inp);