/[public]/psiconv/trunk/lib/psiconv/unicode.c
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Diff of /psiconv/trunk/lib/psiconv/unicode.c

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Revision 192 Revision 268
1/* 1/*
2 unicode.c - Part of psiconv, a PSION 5 file formats converter 2 unicode.c - Part of psiconv, a PSION 5 file formats converter
3 Copyright (c) 2003 Frodo Looijaard <frodol@dds.nl> 3 Copyright (c) 2003-2004 Frodo Looijaard <frodol@dds.nl>
4 4
5 This program is free software; you can redistribute it and/or modify 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 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 7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version. 8 (at your option) any later version.
… …
20#include "config.h" 20#include "config.h"
21#include "compat.h" 21#include "compat.h"
22#include "error.h" 22#include "error.h"
23 23
24#include "unicode.h" 24#include "unicode.h"
25#include "parse_routines.h"
26#include "generate_routines.h"
25 27
26#include <string.h> 28#include <string.h>
29#include <stdlib.h>
27 30
28#ifdef DMALLOC 31#ifdef DMALLOC
29#include <dmalloc.h> 32#include <dmalloc.h>
30#endif 33#endif
31 34
… …
84 } 87 }
85 return 0; 88 return 0;
86} 89}
87 90
88 91
89psiconv_ucs2 psiconv_unicode_from_char(const psiconv_config config, 92psiconv_ucs2 psiconv_unicode_read_char(const psiconv_config config,
90 psiconv_u8 input) 93 psiconv_buffer buf,
94 int lev,psiconv_u32 off,
95 int *length,int *status)
91{ 96{
97 psiconv_u8 char1,char2,char3;
98 psiconv_ucs2 result=0;
99 int res;
100 int len=0;
101
102 char1 = psiconv_read_u8(config,buf,lev,off+len,&res);
103 if (res)
104 goto ERROR;
105 len ++;
106
107 if (config->unicode) {
108 if (char1 >= 0xf0) {
109 res = PSICONV_E_PARSE;
110 goto ERROR;
111 } else if (char1 < 0x80)
112 result = char1;
113 else {
114 char2 = psiconv_read_u8(config,buf,lev,off+len,&res);
115 len ++;
116 if ((char2 & 0xc0) != 0x80) {
117 res = PSICONV_E_PARSE;
118 goto ERROR;
119 }
120 if (char1 < 0xe0)
121 result = ((char1 & 0x1f) << 6) | (char2 & 0x3f);
122 else {
123 char3 = psiconv_read_u8(config,buf,lev,off+len,&res);
124 len ++;
125 if ((char3 & 0xc0) != 0x80) {
126 res = PSICONV_E_PARSE;
127 goto ERROR;
128 }
129 result = ((char1 & 0x0f) << 12) | ((char2 & 0x3f) << 6) |
130 (char3 & 0x3f);
131 }
132 }
133 } else
92 return config->unicode_table[input]?config->unicode_table[input]: 134 result = config->unicode_table[char1]?config->unicode_table[char1]:
93 config->unknown_unicode_char; 135 config->unknown_unicode_char;
136ERROR:
137 if (length)
138 *length = len;
139 if (status)
140 *status = res;
141 return result;
94} 142}
95 143
96/* This is quite inefficient at the moment; the obvious ways of making it 144int psiconv_unicode_write_char(const psiconv_config config,
97 faster consume quite a bit of memory, though */ 145 psiconv_buffer buf,
98psiconv_u8 psiconv_unicode_to_char(psiconv_config config,psiconv_ucs2 input) 146 int lev, psiconv_ucs2 value)
99{ 147{
100 int i; 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 {
101 for (i = 0; i < 256; i++) 169 for (i = 0; i < 256; i++)
102 if (config->unicode_table[i] == input) 170 if (config->unicode_table[i] == value)
103 break; 171 break;
104 return (i == 256?config->unknown_epoc_char:i); 172 if ((res = psiconv_write_u8(config,buf,lev,
105} 173 i == 256?config->unknown_epoc_char:i)))
106 174 goto ERROR;
107int psiconv_unicode_from_chars(const psiconv_config config, 175 }
108 const psiconv_u8 *input, 176ERROR:
109 psiconv_ucs2 **output) 177 return res;
110{
111 int i;
112 if (!output)
113 return PSICONV_E_NOMEM;
114 if (!(*output = malloc(sizeof(**output) * (1 + strlen(input)))))
115 return PSICONV_E_NOMEM;
116 for (i = 0; i < strlen(input); i++)
117 (*output)[i] = psiconv_unicode_from_char(config,input[i]);
118 (*output)[i] = 0x0000;
119 return PSICONV_E_OK;
120}
121
122int psiconv_unicode_to_chars(const psiconv_config config,
123 const psiconv_ucs2 *input,
124 psiconv_u8 **output)
125{
126 int i;
127 if (!output)
128 return -PSICONV_E_NOMEM;
129 if (!(*output = malloc(sizeof(**output) *
130 (1 + psiconv_unicode_strlen(input)))))
131 return -PSICONV_E_NOMEM;
132 for (i = 0; i < psiconv_unicode_strlen(input); i++)
133 (*output)[i] = psiconv_unicode_to_char(config,input[i]);
134 (*output)[i] = 0x00;
135 return -PSICONV_E_OK;
136} 178}
137 179
138int psiconv_unicode_strlen(const psiconv_ucs2 *input) 180int psiconv_unicode_strlen(const psiconv_ucs2 *input)
139{ 181{
140 int i = 0; 182 int i = 0;
… …
172 return 1; 214 return 1;
173 else 215 else
174 return 0; 216 return 0;
175} 217}
176 218
219
220psiconv_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
230psiconv_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
246ERROR2:
247 free(result);
248ERROR1:
249 return NULL;
250}
251
252
253psiconv_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 (psiconv_ucs2 *) haystack+i;
268 }
269 return NULL;
270}
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frodo@frodo.looijaard.name
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