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Contents of /psiconv/trunk/lib/psiconv/unicode.c

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Revision 228 - (show annotations)
Wed Feb 25 16:11:17 2004 UTC (20 years ago) by frodo
File MIME type: text/plain
File size: 8223 byte(s)
(Frodo) AbiWord work
  * Update version to 0.9.3
  * Update library version
  * New functions psiconv_unicode_from_list and psiconv_unicode_strstr

1 /*
2 unicode.c - Part of psiconv, a PSION 5 file formats converter
3 Copyright (c) 2003-2004 Frodo Looijaard <frodol@dds.nl>
4
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.
9
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.
14
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., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 #include "config.h"
21 #include "compat.h"
22 #include "error.h"
23
24 #include "unicode.h"
25 #include "parse_routines.h"
26 #include "generate_routines.h"
27
28 #include <string.h>
29
30 #ifdef DMALLOC
31 #include <dmalloc.h>
32 #endif
33
34
35
36 psiconv_ucs2 table_cp1252[0x100] =
37 {
38 /* 0x00 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0006, 0x0007,
39 /* 0x08 */ 0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
40 /* 0x10 */ 0x00a0, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
41 /* 0x18 */ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
42 /* 0x20 */ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
43 /* 0x28 */ 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
44 /* 0x30 */ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
45 /* 0x38 */ 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
46 /* 0x40 */ 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
47 /* 0x48 */ 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
48 /* 0x50 */ 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
49 /* 0x58 */ 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
50 /* 0x60 */ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
51 /* 0x68 */ 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
52 /* 0x70 */ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
53 /* 0x78 */ 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x0000,
54 /* 0x80 */ 0x20ac, 0x0000, 0x201a, 0x0192, 0x201e, 0x2026, 0x2020, 0x2021,
55 /* 0x88 */ 0x02c6, 0x2030, 0x0160, 0x2039, 0x0152, 0x0000, 0x017d, 0x0000,
56 /* 0x90 */ 0x0000, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014,
57 /* 0x98 */ 0x02dc, 0x2122, 0x0161, 0x203a, 0x0153, 0x0000, 0x017e, 0x0178,
58 /* 0xa0 */ 0x0000, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
59 /* 0xa8 */ 0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
60 /* 0xb0 */ 0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
61 /* 0xb8 */ 0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
62 /* 0xc0 */ 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
63 /* 0xd8 */ 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
64 /* 0xd0 */ 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
65 /* 0xe8 */ 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
66 /* 0xe0 */ 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
67 /* 0xc8 */ 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
68 /* 0xf0 */ 0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
69 /* 0xf8 */ 0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
70 };
71
72
73
74 /* TODO: Check the charset number, select the correct one */
75 extern int psiconv_unicode_select_characterset(const psiconv_config config,
76 int charset)
77 {
78 switch(charset) {
79 case 0: config->unicode = psiconv_bool_true;
80 break;
81 case 1: config->unicode = psiconv_bool_false;
82 memcpy(config->unicode_table,table_cp1252,
83 sizeof(psiconv_ucs2) * 0x100);
84 break;
85 default: return -1;
86 }
87 return 0;
88 }
89
90
91 psiconv_ucs2 psiconv_unicode_read_char(const psiconv_config config,
92 psiconv_buffer buf,
93 int lev,psiconv_u32 off,
94 int *length,int *status)
95 {
96 psiconv_u8 char1,char2,char3;
97 psiconv_ucs2 result=0;
98 int res;
99 int len=0;
100
101 char1 = psiconv_read_u8(config,buf,lev,off+len,&res);
102 if (res)
103 goto ERROR;
104 len ++;
105
106 if (config->unicode) {
107 if (char1 >= 0xf0) {
108 res = PSICONV_E_PARSE;
109 goto ERROR;
110 } else if (char1 < 0x80)
111 result = char1;
112 else {
113 char2 = psiconv_read_u8(config,buf,lev,off+len,&res);
114 len ++;
115 if ((char2 & 0xc0) != 0x80) {
116 res = PSICONV_E_PARSE;
117 goto ERROR;
118 }
119 if (char1 < 0xe0)
120 result = ((char1 & 0x1f) << 6) | (char2 & 0x3f);
121 else {
122 char3 = psiconv_read_u8(config,buf,lev,off+len,&res);
123 len ++;
124 if ((char3 & 0xc0) != 0x80) {
125 res = PSICONV_E_PARSE;
126 goto ERROR;
127 }
128 result = ((char1 & 0x0f) << 12) | ((char2 & 0x3f) << 6) |
129 (char3 & 0x3f);
130 }
131 }
132 } else
133 result = config->unicode_table[char1]?config->unicode_table[char1]:
134 config->unknown_unicode_char;
135 ERROR:
136 if (length)
137 *length = len;
138 if (status)
139 *status = res;
140 return result;
141 }
142
143 int psiconv_unicode_write_char(const psiconv_config config,
144 psiconv_buffer buf,
145 int lev, psiconv_ucs2 value)
146 {
147 psiconv_u8 byte;
148 int i;
149 int res=0;
150
151 if (config->unicode) {
152 if (value < 0x80) {
153 if ((res = psiconv_write_u8(config,buf,lev,value)))
154 goto ERROR;
155 } else if (value < 0x800) {
156 if ((res = psiconv_write_u8(config,buf,lev,0xc0 | (value >> 6))))
157 goto ERROR;
158 if ((res = psiconv_write_u8(config,buf,lev,0x80 | (value & 0x3f))))
159 goto ERROR;
160 } else {
161 if ((res = psiconv_write_u8(config,buf,lev,0xe0 | (value >> 12))))
162 goto ERROR;
163 if ((res = psiconv_write_u8(config,buf,lev,0x80 | ((value >> 6) & 0x3f))))
164 goto ERROR;
165 if ((res = psiconv_write_u8(config,buf,lev,0x80 | (value & 0x3f))))
166 goto ERROR;
167 }
168 } else {
169 for (i = 0; i < 256; i++)
170 if (config->unicode_table[i] == value)
171 break;
172 if ((res = psiconv_write_u8(config,buf,lev,
173 i == 256?config->unknown_epoc_char:i)))
174 goto ERROR;
175 }
176 ERROR:
177 return res;
178 }
179
180 int psiconv_unicode_strlen(const psiconv_ucs2 *input)
181 {
182 int i = 0;
183 while (input[i])
184 i++;
185 return i;
186 }
187
188 psiconv_ucs2 *psiconv_unicode_strdup(const psiconv_ucs2 *input)
189 {
190 psiconv_ucs2 *output;
191 int i = 0;
192
193 if (!(output = malloc(sizeof(*output) *
194 (1 + psiconv_unicode_strlen(input)))))
195 return NULL;
196 while ((output[i] = input[i]))
197 i++;
198 return output;
199 }
200
201 int psiconv_unicode_strcmp(const psiconv_ucs2 *str1, const psiconv_ucs2 *str2)
202 {
203 int i = 0;
204 while (str1[i] && str2[i]) {
205 if (str1[i] < str2[i])
206 return -1;
207 if (str1[i] > str2[i])
208 return 1;
209 i++;
210 }
211 if (str1[i] < str2[i])
212 return -1;
213 else if (str1[i] > str2[i])
214 return 1;
215 else
216 return 0;
217 }
218
219
220 psiconv_ucs2 *psiconv_unicode_empty_string(void)
221 {
222 psiconv_ucs2 *result;
223 result = malloc(sizeof(psiconv_ucs2));
224 if (result)
225 result[0] = 0;
226 return result;
227 }
228
229
230 psiconv_ucs2 *psiconv_unicode_from_list(psiconv_list input)
231 {
232 psiconv_ucs2 *result;
233 int i;
234 psiconv_ucs2 *character;
235
236 if (!(result = malloc(sizeof(psiconv_ucs2) * (psiconv_list_length(input)+1))))
237 goto ERROR1;
238 for (i = 0; i < psiconv_list_length(input); i++) {
239 if (!(character = psiconv_list_get(input,i)))
240 goto ERROR2;
241 result[i] = *character;
242 }
243 result[i] = 0;
244 return result;
245
246 ERROR2:
247 free(result);
248 ERROR1:
249 return NULL;
250 }
251
252
253 psiconv_ucs2 *psiconv_unicode_strstr(const psiconv_ucs2 *haystack,
254 const psiconv_ucs2 *needle)
255 {
256 int i,j,haystack_len,needle_len;
257 haystack_len = psiconv_unicode_strlen(haystack);
258 needle_len = psiconv_unicode_strlen(needle);
259
260
261
262 for (i = 0; i < haystack_len - needle_len + 1; i++) {
263 for (j = 0; j < needle_len; j++)
264 if (haystack[i+j] != needle[j])
265 break;
266 if (j == needle_len)
267 return haystack+i;
268 }
269 return NULL;
270 }

frodo@frodo.looijaard.name
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