1 : /*
2 : * "streamable kanji code filter and converter"
3 : * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
4 : *
5 : * LICENSE NOTICES
6 : *
7 : * This file is part of "streamable kanji code filter and converter",
8 : * which is distributed under the terms of GNU Lesser General Public
9 : * License (version 2) as published by the Free Software Foundation.
10 : *
11 : * This software is distributed in the hope that it will be useful,
12 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 : * GNU Lesser General Public License for more details.
15 : *
16 : * You should have received a copy of the GNU Lesser General Public
17 : * License along with "streamable kanji code filter and converter";
18 : * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
19 : * Suite 330, Boston, MA 02111-1307 USA
20 : *
21 : * The author of this file:
22 : *
23 : */
24 : /*
25 : * The source code included in this files was separated from mbfilter.c
26 : * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
27 : *
28 : */
29 :
30 : #ifdef HAVE_CONFIG_H
31 : #include "config.h"
32 : #endif
33 :
34 : #include "mbfilter.h"
35 : #include "mbfilter_qprint.h"
36 : #include "unicode_prop.h"
37 :
38 : static const char *mbfl_encoding_qprint_aliases[] = {"qprint", NULL};
39 :
40 : const mbfl_encoding mbfl_encoding_qprint = {
41 : mbfl_no_encoding_qprint,
42 : "Quoted-Printable",
43 : "Quoted-Printable",
44 : (const char *(*)[])&mbfl_encoding_qprint_aliases,
45 : NULL,
46 : MBFL_ENCTYPE_SBCS
47 : };
48 :
49 : const struct mbfl_convert_vtbl vtbl_8bit_qprint = {
50 : mbfl_no_encoding_8bit,
51 : mbfl_no_encoding_qprint,
52 : mbfl_filt_conv_common_ctor,
53 : mbfl_filt_conv_common_dtor,
54 : mbfl_filt_conv_qprintenc,
55 : mbfl_filt_conv_qprintenc_flush };
56 :
57 : const struct mbfl_convert_vtbl vtbl_qprint_8bit = {
58 : mbfl_no_encoding_qprint,
59 : mbfl_no_encoding_8bit,
60 : mbfl_filt_conv_common_ctor,
61 : mbfl_filt_conv_common_dtor,
62 : mbfl_filt_conv_qprintdec,
63 : mbfl_filt_conv_qprintdec_flush };
64 :
65 :
66 : #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
67 :
68 : /*
69 : * any => Quoted-Printable
70 : */
71 :
72 : int mbfl_filt_conv_qprintenc(int c, mbfl_convert_filter *filter)
73 17914 : {
74 : int s, n;
75 :
76 17914 : switch (filter->status & 0xff) {
77 : case 0:
78 423 : filter->cache = c;
79 423 : filter->status++;
80 423 : break;
81 : default:
82 17491 : s = filter->cache;
83 17491 : filter->cache = c;
84 17491 : n = (filter->status & 0xff00) >> 8;
85 :
86 17491 : if (s == 0) { /* null */
87 0 : CK((*filter->output_function)(s, filter->data));
88 0 : filter->status &= ~0xff00;
89 0 : break;
90 : }
91 :
92 17491 : if ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) == 0) {
93 0 : if (s == 0x0a || (s == 0x0d && c != 0x0a)) { /* line feed */
94 0 : CK((*filter->output_function)(0x0d, filter->data)); /* CR */
95 0 : CK((*filter->output_function)(0x0a, filter->data)); /* LF */
96 0 : filter->status &= ~0xff00;
97 0 : break;
98 0 : } else if (s == 0x0d) {
99 0 : break;
100 : }
101 : }
102 :
103 17491 : if ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) == 0 && n >= 72) { /* soft line feed */
104 0 : CK((*filter->output_function)(0x3d, filter->data)); /* '=' */
105 0 : CK((*filter->output_function)(0x0d, filter->data)); /* CR */
106 0 : CK((*filter->output_function)(0x0a, filter->data)); /* LF */
107 0 : filter->status &= ~0xff00;
108 : }
109 :
110 34869 : if (s <= 0 || s >= 0x80 || s == 0x3d /* not ASCII or '=' */
111 : || ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) != 0 &&
112 : (mbfl_charprop_table[s] & MBFL_CHP_MMHQENC) != 0)) {
113 : /* hex-octet */
114 17378 : CK((*filter->output_function)(0x3d, filter->data)); /* '=' */
115 17378 : n = (s >> 4) & 0xf;
116 17378 : if (n < 10) {
117 6577 : n += 48; /* '0' */
118 : } else {
119 10801 : n += 55; /* 'A' - 10 */
120 : }
121 17378 : CK((*filter->output_function)(n, filter->data));
122 17378 : n = s & 0xf;
123 17378 : if (n < 10) {
124 8019 : n += 48;
125 : } else {
126 9359 : n += 55;
127 : }
128 17378 : CK((*filter->output_function)(n, filter->data));
129 17378 : if ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) == 0) {
130 0 : filter->status += 0x300;
131 : }
132 : } else {
133 113 : CK((*filter->output_function)(s, filter->data));
134 113 : if ((filter->status & MBFL_QPRINT_STS_MIME_HEADER) == 0) {
135 0 : filter->status += 0x100;
136 : }
137 : }
138 : break;
139 : }
140 :
141 17914 : return c;
142 : }
143 :
144 : int mbfl_filt_conv_qprintenc_flush(mbfl_convert_filter *filter)
145 4504 : {
146 : /* flush filter cache */
147 4504 : (*filter->filter_function)('\0', filter);
148 4504 : filter->status &= ~0xffff;
149 4504 : filter->cache = 0;
150 4504 : return 0;
151 : }
152 :
153 : /*
154 : * Quoted-Printable => any
155 : */
156 : int mbfl_filt_conv_qprintdec(int c, mbfl_convert_filter *filter)
157 457 : {
158 : int n, m;
159 :
160 : static int hex2code_map[] = {
161 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
162 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
163 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
164 : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
165 : -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
166 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
167 : -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
168 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
169 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
170 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
171 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
172 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
173 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
174 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
175 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
176 : -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
177 : };
178 :
179 457 : switch (filter->status) {
180 : case 1:
181 143 : if (hex2code_map[c & 0xff] >= 0) {
182 143 : filter->cache = c;
183 143 : filter->status = 2;
184 0 : } else if (c == 0x0d) { /* soft line feed */
185 0 : filter->status = 3;
186 0 : } else if (c == 0x0a) { /* soft line feed */
187 0 : filter->status = 0;
188 : } else {
189 0 : CK((*filter->output_function)(0x3d, filter->data)); /* '=' */
190 0 : CK((*filter->output_function)(c, filter->data));
191 0 : filter->status = 0;
192 : }
193 143 : break;
194 : case 2:
195 143 : m = hex2code_map[c & 0xff];
196 143 : if (m < 0) {
197 0 : CK((*filter->output_function)(0x3d, filter->data)); /* '=' */
198 0 : CK((*filter->output_function)(filter->cache, filter->data));
199 0 : n = c;
200 : } else {
201 143 : n = hex2code_map[filter->cache] << 4 | m;
202 : }
203 143 : CK((*filter->output_function)(n, filter->data));
204 143 : filter->status = 0;
205 143 : break;
206 : case 3:
207 0 : if (c != 0x0a) { /* LF */
208 0 : CK((*filter->output_function)(c, filter->data));
209 : }
210 0 : filter->status = 0;
211 0 : break;
212 : default:
213 171 : if (c == 0x3d) { /* '=' */
214 143 : filter->status = 1;
215 : } else {
216 28 : CK((*filter->output_function)(c, filter->data));
217 : }
218 : break;
219 : }
220 :
221 457 : return c;
222 : }
223 :
224 : int mbfl_filt_conv_qprintdec_flush(mbfl_convert_filter *filter)
225 11 : {
226 : int status, cache;
227 :
228 11 : status = filter->status;
229 11 : cache = filter->cache;
230 11 : filter->status = 0;
231 11 : filter->cache = 0;
232 : /* flush fragments */
233 11 : if (status == 1) {
234 0 : CK((*filter->output_function)(0x3d, filter->data)); /* '=' */
235 11 : } else if (status == 2) {
236 0 : CK((*filter->output_function)(0x3d, filter->data)); /* '=' */
237 0 : CK((*filter->output_function)(cache, filter->data));
238 : }
239 :
240 11 : return 0;
241 : }
242 :
243 :
244 :
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