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Annotation of /psiconv/trunk/lib/psiconv/parse_simple.c

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Revision 182 - (hide annotations)
Sun Jan 4 22:07:02 2004 UTC (20 years, 2 months ago) by frodo
File MIME type: text/plain
File size: 11706 byte(s)
(Frodo) Move fontnames to psiconv_string type

1 frodo 2 /*
2     parse_simple.c - Part of psiconv, a PSION 5 file formats converter
3 frodo 63 Copyright (c) 1999, 2000 Frodo Looijaard <frodol@dds.nl>
4 frodo 2
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 frodo 71 #include "compat.h"
22    
23 frodo 2 #include <stdlib.h>
24 frodo 101 #include <math.h>
25 frodo 2
26     #include "parse_routines.h"
27 frodo 71 #include "error.h"
28 frodo 2
29 frodo 142 #ifdef DMALLOC
30     #include <dmalloc.h>
31     #endif
32    
33 frodo 171 static psiconv_float_t pow2(int n);
34 frodo 182 static psiconv_string_t psiconv_read_string_aux(const psiconv_config config,
35     const psiconv_buffer buf,int lev,
36     psiconv_u32 off,int *length, int *status,
37     int kind);
38 frodo 171
39 frodo 118 /* Very inefficient, but good enough for now. By implementing it ourselves,
40     we do not have to link with -lm */
41     psiconv_float_t pow2(int n)
42     {
43     psiconv_float_t res=1.0;
44     int i;
45    
46     for (i = 0; i < (n<0?-n:n); i++)
47     res *= 2.0;
48    
49     return n<0?1/res:res;
50     }
51 frodo 168 psiconv_u8 psiconv_read_u8(const psiconv_config config,const psiconv_buffer buf,int lev,psiconv_u32 off,
52 frodo 64 int *status)
53 frodo 2 {
54     psiconv_u8 *ptr;
55 frodo 79 ptr = psiconv_buffer_get(buf,off);
56 frodo 64 if (!ptr) {
57 frodo 168 psiconv_warn(config,lev,off,"Trying byte read past the end of the file");
58 frodo 64 if (status)
59     *status = -PSICONV_E_PARSE;
60     return 0;
61     }
62     if (status)
63     *status = 0;
64 frodo 2 return *ptr;
65     }
66    
67 frodo 168 psiconv_u16 psiconv_read_u16(const psiconv_config config,const psiconv_buffer buf,int lev,psiconv_u32 off,
68 frodo 64 int *status)
69 frodo 2 {
70     psiconv_u8 *ptr0,*ptr1;
71 frodo 79 ptr0 = psiconv_buffer_get(buf,off);
72     ptr1 = psiconv_buffer_get(buf,off+1);
73 frodo 64 if (!ptr0 || !ptr1) {
74 frodo 168 psiconv_warn(config,lev,off,"Trying word read past the end of the file");
75 frodo 64 if (status)
76     *status = -PSICONV_E_PARSE;
77     return 0;
78     }
79     if (status)
80     *status = 0;
81 frodo 2 return *ptr0 + (*ptr1 << 8);
82     }
83    
84 frodo 168 psiconv_u32 psiconv_read_u32(const psiconv_config config,const psiconv_buffer buf,int lev,psiconv_u32 off,
85 frodo 64 int *status)
86 frodo 2 {
87     psiconv_u8 *ptr0,*ptr1,*ptr2,*ptr3;
88 frodo 79 ptr0 = psiconv_buffer_get(buf,off);
89     ptr1 = psiconv_buffer_get(buf,off+1);
90     ptr2 = psiconv_buffer_get(buf,off+2);
91     ptr3 = psiconv_buffer_get(buf,off+3);
92 frodo 64 if (!ptr0 || !ptr1 || !ptr2 || !ptr3) {
93 frodo 168 psiconv_warn(config,lev,off,"Trying long read past the end of the file");
94 frodo 64 if (status)
95     *status = -PSICONV_E_PARSE;
96     return 0;
97     }
98     if (status)
99     *status = 0;
100 frodo 2 return *ptr0 + (*ptr1 << 8) + (*ptr2 << 16) + (*ptr3 << 24);
101     }
102    
103 frodo 168 psiconv_s32 psiconv_read_sint(const psiconv_config config,const psiconv_buffer buf,int lev,psiconv_u32 off,
104 frodo 129 int *length,int *status)
105     {
106     int localstatus;
107     psiconv_u32 temp;
108    
109 frodo 168 temp=psiconv_read_u32(config,buf,lev,off,&localstatus);
110 frodo 129 if (status)
111     *status = localstatus;
112     if (length)
113     *length = localstatus?0:4;
114    
115     return localstatus?0:(temp & 0x7fffffff)*(temp&0x80000000?-1:1);
116     }
117    
118 frodo 168 psiconv_S_t psiconv_read_S(const psiconv_config config,const psiconv_buffer buf, int lev, psiconv_u32 off,
119 frodo 64 int *length,int *status)
120 frodo 2 {
121     psiconv_u8 temp;
122     psiconv_S_t res;
123 frodo 64 int len,localstatus;
124 frodo 2
125 frodo 168 psiconv_progress(config,lev+1,off,"Going to read a S length indicator");
126     temp = psiconv_read_u8(config,buf,lev+2,off,&localstatus);
127 frodo 64 if (localstatus)
128     goto ERROR;
129 frodo 2 if ((temp & 0x03) == 0x02) {
130 frodo 168 res = psiconv_read_u8(config,buf,lev+2,off,&localstatus) >> 2;
131 frodo 64 if (localstatus)
132     goto ERROR;
133 frodo 2 len = 1;
134 frodo 168 psiconv_debug(config,lev+2,off,"Indicator (1 byte): %02x",res);
135 frodo 132 } else if ((temp & 0x07) == 0x05) {
136 frodo 168 res = psiconv_read_u16(config,buf,lev+2,off,&localstatus) >> 3;
137 frodo 64 if (localstatus)
138     goto ERROR;
139 frodo 2 len = 2;
140 frodo 168 psiconv_debug(config,lev+2,off,"Indicator (2 bytes): %04x",res);
141 frodo 2 } else {
142 frodo 168 psiconv_warn(config,lev+2,off,"S indicator: unknown encoding!");
143     psiconv_debug(config,lev+2,off,"Raw data first byte: %02x",temp);
144 frodo 64 goto ERROR;
145 frodo 2 }
146    
147     if (length)
148     *length = len;
149 frodo 64 if (status)
150     *status = 0;
151 frodo 2
152 frodo 168 psiconv_progress(config,lev+1,off+len-1,
153 frodo 2 "End of S length indicator (total length: %08x)", len);
154    
155     return res;
156 frodo 64
157     ERROR:
158 frodo 168 psiconv_warn(config,lev+1,off,"Reading of S indicator failed");
159 frodo 64 if (status)
160     *status = localstatus;
161     if (length)
162     *length = 0;
163     return 0;
164 frodo 2 }
165    
166 frodo 168 psiconv_X_t psiconv_read_X(const psiconv_config config,const psiconv_buffer buf, int lev, psiconv_u32 off,
167 frodo 64 int *length, int *status)
168 frodo 2 {
169     psiconv_u8 temp;
170     psiconv_X_t res;
171 frodo 64 int len,localstatus;
172 frodo 2
173 frodo 168 psiconv_progress(config,lev+1,off,"Going to read a X length indicator");
174     temp = psiconv_read_u8(config,buf,lev+2,off,&localstatus);
175 frodo 64 if (localstatus)
176     goto ERROR;
177 frodo 2 if ((temp & 0x01) == 0x00) {
178 frodo 168 res = psiconv_read_u8(config,buf,lev+2,off,&localstatus) >> 1;
179 frodo 64 if (localstatus)
180     goto ERROR;
181 frodo 2 len = 1;
182 frodo 168 psiconv_debug(config,lev+2,off,"Indicator (1 byte): %02x",res);
183 frodo 2 } else if ((temp & 0x03) == 0x01) {
184 frodo 168 res = psiconv_read_u16(config,buf,lev+2,off,&localstatus) >> 2;
185 frodo 64 if (localstatus)
186     goto ERROR;
187 frodo 2 len = 2;
188 frodo 168 psiconv_debug(config,lev+2,off,"Indicator (2 bytes): %04x",res);
189 frodo 2 } else if ((temp & 0x07) == 0x03) {
190 frodo 168 res = psiconv_read_u32(config,buf,lev+2,off,&localstatus) >> 3;
191 frodo 64 if (localstatus)
192     goto ERROR;
193 frodo 2 len = 4;
194 frodo 168 psiconv_debug(config,lev+2,off,"Indicator (4 bytes): %08x",res);
195 frodo 2 } else {
196 frodo 168 psiconv_warn(config,lev+2,off,"X indicator: unknown encoding!");
197     psiconv_debug(config,lev+2,off,"Raw data first byte: %02x",temp);
198 frodo 64 goto ERROR;
199 frodo 2 }
200    
201     if (length)
202     *length = len;
203 frodo 64 if (status)
204     *status = 0;
205 frodo 2
206 frodo 168 psiconv_progress(config,lev+1,off+len-1,
207 frodo 2 "End of X length indicator (total length: %08x)", len);
208    
209     return res;
210 frodo 64
211     ERROR:
212 frodo 168 psiconv_warn(config,lev+1,off,"Reading of X indicator failed");
213 frodo 64 if (status)
214     *status = localstatus;
215     if (length)
216     *length = 0;
217     return 0;
218 frodo 2 }
219    
220 frodo 168 psiconv_length_t psiconv_read_length(const psiconv_config config,const psiconv_buffer buf, int lev,
221 frodo 64 psiconv_u32 off, int *length, int *status)
222 frodo 2 {
223     psiconv_length_t res;
224 frodo 64 int localstatus;
225    
226 frodo 168 res = (2.54/1440.0) * ((psiconv_s32) psiconv_read_u32(config,buf,lev,off,
227 frodo 64 &localstatus));
228     if (localstatus) {
229 frodo 168 psiconv_warn(config,lev+1,off,"Reading of length failed");
230 frodo 64 if (length)
231     *length = 0;
232     if (status)
233     *status = localstatus;
234     return 0;
235     }
236 frodo 168 psiconv_debug(config,lev+1,off,"Length: %f",res);
237 frodo 2 if (length)
238     *length = 4;
239 frodo 64 if (status)
240     *status = 0;
241 frodo 2 return res;
242     }
243    
244 frodo 168 psiconv_size_t psiconv_read_size(const psiconv_config config,const psiconv_buffer buf, int lev,
245 frodo 64 psiconv_u32 off, int *length, int *status)
246 frodo 2 {
247     psiconv_size_t res;
248 frodo 64 int localstatus;
249 frodo 168 res = ((psiconv_s32) psiconv_read_u32(config,buf,lev,off,&localstatus)) / 20.0;
250 frodo 64 if (localstatus) {
251 frodo 168 psiconv_warn(config,lev+1,off,"Reading of size failed");
252 frodo 64 if (length)
253     *length = 0;
254     if (status)
255     *status = localstatus;
256     return 0;
257     }
258 frodo 168 psiconv_debug(config,lev+1,off,"Size: %f",res);
259 frodo 64 if (status)
260     *status = 0;
261 frodo 2 if (length)
262     *length = 4;
263     return res;
264     }
265    
266 frodo 168 int psiconv_parse_bool(const psiconv_config config,const psiconv_buffer buf, int lev, psiconv_u32 off,
267 frodo 2 int *length, psiconv_bool_t *result)
268     {
269     psiconv_u8 temp;
270 frodo 64 int localstatus;
271 frodo 168 temp = psiconv_read_u8(config,buf,lev,off,&localstatus);
272 frodo 64 if (localstatus) {
273 frodo 168 psiconv_warn(config,lev+1,off,"Reading of bool failed");
274 frodo 64 if (length)
275     *length = 0;
276     return localstatus;
277     }
278 frodo 2 if (length)
279     *length = 1;
280     if (temp == 0) {
281     *result = psiconv_bool_false;
282     return 0;
283     } else if (temp == 1) {
284     *result = psiconv_bool_true;
285     return 0;
286     }
287 frodo 168 psiconv_warn(config,lev+1,off,"Unknown value for boolean");
288     psiconv_debug(config,lev+1,off,"Boolean value: %02x",temp);
289 frodo 2 *result = psiconv_bool_true;
290 frodo 64 return 0;
291 frodo 2 }
292    
293 frodo 182 psiconv_string_t psiconv_read_string(const psiconv_config config,
294     const psiconv_buffer buf,int lev,
295 frodo 64 psiconv_u32 off,int *length, int *status)
296 frodo 2 {
297 frodo 182 return psiconv_read_string_aux(config,buf,lev,off,length,status,0);
298     }
299    
300     psiconv_string_t psiconv_read_short_string(const psiconv_config config,
301     const psiconv_buffer buf,int lev,
302     psiconv_u32 off,int *length, int *status)
303     {
304     return psiconv_read_string_aux(config,buf,lev,off,length,status,1);
305     }
306    
307     psiconv_string_t psiconv_read_string_aux(const psiconv_config config,
308     const psiconv_buffer buf,int lev,
309     psiconv_u32 off,int *length, int *status,
310     int kind)
311     {
312 frodo 64 int stringlen,i,leng,len,localstatus;
313 frodo 2 psiconv_string_t result;
314     char *res_copy;
315    
316 frodo 168 psiconv_progress(config,lev+1,off,"Going to read a string");
317 frodo 2
318 frodo 182 if (kind == 0)
319     stringlen = psiconv_read_S(config,buf,lev+2,off,&leng,&localstatus);
320     else {
321     stringlen = psiconv_read_u8(config,buf,lev+2,off,&localstatus);
322     leng = 1;
323     }
324    
325 frodo 64 if (localstatus)
326     goto ERROR1;
327 frodo 168 psiconv_debug(config,lev+2,off,"Length: %i",stringlen);
328 frodo 2 len = leng;
329    
330     result = malloc(stringlen + 1);
331 frodo 64 if (!result)
332     goto ERROR1;
333     for (i = 0; (i < stringlen) && !localstatus; i++)
334 frodo 168 result[i] = psiconv_read_u8(config,buf,lev,off+i+len,&localstatus);
335 frodo 64 if (localstatus)
336     goto ERROR2;
337 frodo 2 result[stringlen] = 0;
338     len += stringlen;
339    
340     res_copy = psiconv_make_printable(result);
341 frodo 64 if (!res_copy)
342     goto ERROR2;
343 frodo 168 psiconv_debug(config,lev+2,off,"Contents: `%s'",res_copy);
344 frodo 2 free(res_copy);
345    
346     if (length)
347     *length = len;
348    
349 frodo 64 if (status)
350     *status = 0;
351    
352 frodo 168 psiconv_progress(config,lev+1,off+len-1,"End of string (total length: %08x)",len);
353 frodo 2
354     return result;
355 frodo 64
356     ERROR2:
357     free(result);
358     ERROR1:
359 frodo 168 psiconv_warn(config,lev+1,off,"Reading of string failed");
360 frodo 64 if (status)
361     *status = localstatus;
362     if (length)
363     *length = 0;
364     return NULL;
365 frodo 2 }
366 frodo 101
367 frodo 168 psiconv_float_t psiconv_read_float(const psiconv_config config,const psiconv_buffer buf, int lev,
368 frodo 101 psiconv_u32 off, int *length, int *status)
369     {
370     psiconv_float_t result,bitvalue;
371     int res,bit;
372     psiconv_u32 temp=0;
373    
374 frodo 168 psiconv_progress(config,lev+1,off,"Going to read a float");
375 frodo 101
376     bitvalue = 0.5;
377     result = 1.0;
378     for (bit = 0x33; bit > 0; bit--) {
379     if ((bit == 0x33) || ((bit & 0x07) == 0x07))
380 frodo 168 temp = psiconv_read_u8(config,buf,lev+2,off+ (bit >> 3),&res);
381 frodo 101 if (res)
382     goto ERROR;
383     if (temp & (0x01 << (bit & 0x07)))
384     result += bitvalue;
385     bitvalue /= 2.0;
386     }
387 frodo 168 temp = psiconv_read_u16(config,buf,lev+2,off+6,&res);
388 frodo 101 if (res)
389     goto ERROR;
390     if (temp & 0x8000)
391     result = -result;
392     temp = (temp & 0x7ff0) >> 4;
393 frodo 118 result *= pow2(((int) temp)-0x3ff);
394 frodo 168 psiconv_debug(config,lev+1,off,"Float value: %f",result);
395 frodo 101 if (length)
396     *length = 8;
397     if (*status)
398     *status = res;
399     return result;
400     ERROR:
401 frodo 168 psiconv_warn(config,lev+1,off,"Reading of float failed");
402 frodo 101 if (length)
403     *length = 0;
404     if (*status)
405     *status = res;
406     return 0.0;
407     }
408 frodo 118

frodo@frodo.looijaard.name
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