2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail team
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 3 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, see <http://www.gnu.org/licenses/>.
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_const(gchar
*out
, gint avail
, const gchar
*str
)
117 const gchar
*inp
= str
;
120 while (*inp
!= '\0' && avail
> 0) {
122 if (inp
[1] && inp
[2] &&
123 get_hex_value((guchar
*)outp
, inp
[1], inp
[2])
126 } else if (inp
[1] == '\0' || g_ascii_isspace(inp
[1])) {
127 /* soft line break */
130 /* broken QP string */
145 gint
qp_decode_q_encoding(guchar
*out
, const gchar
*in
, gint inlen
)
147 const gchar
*inp
= in
;
153 while (inp
- in
< inlen
&& *inp
!= '\0') {
154 if (*inp
== '=' && inp
+ 3 - in
<= inlen
) {
155 if (get_hex_value(outp
, inp
[1], inp
[2]) == TRUE
) {
160 } else if (*inp
== '_') {
174 gint
qp_get_q_encoding_len(const guchar
*str
)
176 const guchar
*inp
= str
;
179 while (*inp
!= '\0') {
182 else if (*inp
== '=' || *inp
== '?' || *inp
== '_' ||
183 *inp
< 32 || *inp
> 127 || g_ascii_isspace(*inp
))
194 void qp_q_encode(gchar
*out
, const guchar
*in
)
196 const guchar
*inp
= in
;
199 while (*inp
!= '\0') {
202 else if (*inp
== '=' || *inp
== '?' || *inp
== '_' ||
203 *inp
< 32 || *inp
> 127 || g_ascii_isspace(*inp
)) {
205 get_hex_str(outp
, *inp
);