/[public]/psiconv/trunk/lib/psiconv/parse_simple.c
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Revision 54 Revision 129
1/* 1/*
2 parse_simple.c - Part of psiconv, a PSION 5 file formats converter 2 parse_simple.c - Part of psiconv, a PSION 5 file formats converter
3 Copyright (c) 1999 Frodo Looijaard <frodol@dds.nl> 3 Copyright (c) 1999, 2000 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.
… …
16 along with this program; if not, write to the Free Software 16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18*/ 18*/
19 19
20#include "config.h" 20#include "config.h"
21#include "compat.h"
22
21#include <stdlib.h> 23#include <stdlib.h>
24#include <math.h>
22 25
23#include "parse_routines.h" 26#include "parse_routines.h"
27#include "error.h"
24 28
29/* Very inefficient, but good enough for now. By implementing it ourselves,
30 we do not have to link with -lm */
31psiconv_float_t pow2(int n)
32{
33 psiconv_float_t res=1.0;
34 int i;
35
36 for (i = 0; i < (n<0?-n:n); i++)
37 res *= 2.0;
38
39 return n<0?1/res:res;
40}
25psiconv_u8 psiconv_read_u8(const psiconv_buffer buf,int lev,psiconv_u32 off) 41psiconv_u8 psiconv_read_u8(const psiconv_buffer buf,int lev,psiconv_u32 off,
42 int *status)
26{ 43{
27 psiconv_u8 *ptr; 44 psiconv_u8 *ptr;
28 ptr = psiconv_list_get(buf,off); 45 ptr = psiconv_buffer_get(buf,off);
29 if (!ptr) 46 if (!ptr) {
30 psiconv_fatal(lev,off,"Trying byte read past the end of the file"); 47 psiconv_warn(lev,off,"Trying byte read past the end of the file");
48 if (status)
49 *status = -PSICONV_E_PARSE;
50 return 0;
51 }
52 if (status)
53 *status = 0;
31 return *ptr; 54 return *ptr;
32} 55}
33 56
34psiconv_u16 psiconv_read_u16(const psiconv_buffer buf,int lev,psiconv_u32 off) 57psiconv_u16 psiconv_read_u16(const psiconv_buffer buf,int lev,psiconv_u32 off,
58 int *status)
35{ 59{
36 psiconv_u8 *ptr0,*ptr1; 60 psiconv_u8 *ptr0,*ptr1;
37 ptr0 = psiconv_list_get(buf,off); 61 ptr0 = psiconv_buffer_get(buf,off);
38 ptr1 = psiconv_list_get(buf,off+1); 62 ptr1 = psiconv_buffer_get(buf,off+1);
39 if (!ptr0 || !ptr1) 63 if (!ptr0 || !ptr1) {
40 psiconv_fatal(lev,off,"Trying word read past the end of the file"); 64 psiconv_warn(lev,off,"Trying word read past the end of the file");
65 if (status)
66 *status = -PSICONV_E_PARSE;
67 return 0;
68 }
69 if (status)
70 *status = 0;
41 return *ptr0 + (*ptr1 << 8); 71 return *ptr0 + (*ptr1 << 8);
42} 72}
43 73
44psiconv_u32 psiconv_read_u32(const psiconv_buffer buf,int lev,psiconv_u32 off) 74psiconv_u32 psiconv_read_u32(const psiconv_buffer buf,int lev,psiconv_u32 off,
75 int *status)
45{ 76{
46 psiconv_u8 *ptr0,*ptr1,*ptr2,*ptr3; 77 psiconv_u8 *ptr0,*ptr1,*ptr2,*ptr3;
47 ptr0 = psiconv_list_get(buf,off); 78 ptr0 = psiconv_buffer_get(buf,off);
48 ptr1 = psiconv_list_get(buf,off+1); 79 ptr1 = psiconv_buffer_get(buf,off+1);
49 ptr2 = psiconv_list_get(buf,off+2); 80 ptr2 = psiconv_buffer_get(buf,off+2);
50 ptr3 = psiconv_list_get(buf,off+3); 81 ptr3 = psiconv_buffer_get(buf,off+3);
51 if (!ptr0 || !ptr1 || !ptr2 || !ptr3) 82 if (!ptr0 || !ptr1 || !ptr2 || !ptr3) {
52 psiconv_fatal(lev,off,"Trying long read past the end of the file"); 83 psiconv_warn(lev,off,"Trying long read past the end of the file");
84 if (status)
85 *status = -PSICONV_E_PARSE;
86 return 0;
87 }
88 if (status)
89 *status = 0;
53 return *ptr0 + (*ptr1 << 8) + (*ptr2 << 16) + (*ptr3 << 24); 90 return *ptr0 + (*ptr1 << 8) + (*ptr2 << 16) + (*ptr3 << 24);
54} 91}
55 92
93psiconv_s32 psiconv_read_sint(const psiconv_buffer buf,int lev,psiconv_u32 off,
94 int *length,int *status)
95{
96 int localstatus;
97 psiconv_u32 temp;
98
99 temp=psiconv_read_u32(buf,lev,off,&localstatus);
100 if (status)
101 *status = localstatus;
102 if (length)
103 *length = localstatus?0:4;
104
105 return localstatus?0:(temp & 0x7fffffff)*(temp&0x80000000?-1:1);
106}
107
56psiconv_S_t psiconv_read_S(const psiconv_buffer buf, int lev, psiconv_u32 off, 108psiconv_S_t psiconv_read_S(const psiconv_buffer buf, int lev, psiconv_u32 off,
57 int *length) 109 int *length,int *status)
58{ 110{
59 psiconv_u8 temp; 111 psiconv_u8 temp;
60 psiconv_S_t res; 112 psiconv_S_t res;
61 int len; 113 int len,localstatus;
62 114
63 psiconv_progress(lev+1,off,"Going to read a S length indicator"); 115 psiconv_progress(lev+1,off,"Going to read a S length indicator");
64 temp = psiconv_read_u8(buf,lev+2,off); 116 temp = psiconv_read_u8(buf,lev+2,off,&localstatus);
117 if (localstatus)
118 goto ERROR;
65 if ((temp & 0x03) == 0x02) { 119 if ((temp & 0x03) == 0x02) {
66 res = psiconv_read_u8(buf,lev+2,off) >> 2; 120 res = psiconv_read_u8(buf,lev+2,off,&localstatus) >> 2;
121 if (localstatus)
122 goto ERROR;
67 len = 1; 123 len = 1;
68 psiconv_debug(lev+2,off,"Indicator (1 byte): %02x",res); 124 psiconv_debug(lev+2,off,"Indicator (1 byte): %02x",res);
69 } else if ((temp & 0x07) == 0x03) { 125 } else if ((temp & 0x07) == 0x03) {
70 res = psiconv_read_u16(buf,lev+2,off) >> 3; 126 res = psiconv_read_u16(buf,lev+2,off,&localstatus) >> 3;
127 if (localstatus)
128 goto ERROR;
71 len = 2; 129 len = 2;
72 psiconv_debug(lev+2,off,"Indicator (2 bytes): %04x",res); 130 psiconv_debug(lev+2,off,"Indicator (2 bytes): %04x",res);
73 } else { 131 } else {
74 psiconv_warn(lev+2,off,"S indicator: unknown encoding!"); 132 psiconv_warn(lev+2,off,"S indicator: unknown encoding!");
75 psiconv_debug(lev+2,off,"Raw data first byte: %02x",temp); 133 psiconv_debug(lev+2,off,"Raw data first byte: %02x",temp);
76 res = 0; 134 goto ERROR;
77 len = 1;
78 } 135 }
79 136
80 if (length) 137 if (length)
81 *length = len; 138 *length = len;
139 if (status)
140 *status = 0;
82 141
83 psiconv_progress(lev+1,off+len-1, 142 psiconv_progress(lev+1,off+len-1,
84 "End of S length indicator (total length: %08x)", len); 143 "End of S length indicator (total length: %08x)", len);
85 144
86 return res; 145 return res;
146
147ERROR:
148 psiconv_warn(lev+1,off,"Reading of S indicator failed");
149 if (status)
150 *status = localstatus;
151 if (length)
152 *length = 0;
153 return 0;
87} 154}
88 155
89psiconv_X_t psiconv_read_X(const psiconv_buffer buf, int lev, psiconv_u32 off, 156psiconv_X_t psiconv_read_X(const psiconv_buffer buf, int lev, psiconv_u32 off,
90 int *length) 157 int *length, int *status)
91{ 158{
92 psiconv_u8 temp; 159 psiconv_u8 temp;
93 psiconv_X_t res; 160 psiconv_X_t res;
94 int len; 161 int len,localstatus;
95 162
96 psiconv_progress(lev+1,off,"Going to read a X length indicator"); 163 psiconv_progress(lev+1,off,"Going to read a X length indicator");
97 temp = psiconv_read_u8(buf,lev+2,off); 164 temp = psiconv_read_u8(buf,lev+2,off,&localstatus);
165 if (localstatus)
166 goto ERROR;
98 if ((temp & 0x01) == 0x00) { 167 if ((temp & 0x01) == 0x00) {
99 res = psiconv_read_u8(buf,lev+2,off) >> 1; 168 res = psiconv_read_u8(buf,lev+2,off,&localstatus) >> 1;
169 if (localstatus)
170 goto ERROR;
100 len = 1; 171 len = 1;
101 psiconv_debug(lev+2,off,"Indicator (1 byte): %02x",res); 172 psiconv_debug(lev+2,off,"Indicator (1 byte): %02x",res);
102 } else if ((temp & 0x03) == 0x01) { 173 } else if ((temp & 0x03) == 0x01) {
103 res = psiconv_read_u16(buf,lev+2,off) >> 2; 174 res = psiconv_read_u16(buf,lev+2,off,&localstatus) >> 2;
175 if (localstatus)
176 goto ERROR;
104 len = 2; 177 len = 2;
105 psiconv_debug(lev+2,off,"Indicator (2 bytes): %04x",res); 178 psiconv_debug(lev+2,off,"Indicator (2 bytes): %04x",res);
106 } else if ((temp & 0x07) == 0x03) { 179 } else if ((temp & 0x07) == 0x03) {
107 res = psiconv_read_u32(buf,lev+2,off) >> 3; 180 res = psiconv_read_u32(buf,lev+2,off,&localstatus) >> 3;
181 if (localstatus)
182 goto ERROR;
108 len = 4; 183 len = 4;
109 psiconv_debug(lev+2,off,"Indicator (4 bytes): %08x",res); 184 psiconv_debug(lev+2,off,"Indicator (4 bytes): %08x",res);
110 } else { 185 } else {
111 psiconv_warn(lev+2,off,"X indicator: unknown encoding!"); 186 psiconv_warn(lev+2,off,"X indicator: unknown encoding!");
112 psiconv_debug(lev+2,off,"Raw data first byte: %02x",temp); 187 psiconv_debug(lev+2,off,"Raw data first byte: %02x",temp);
113 res = 0; 188 goto ERROR;
114 len = 1;
115 } 189 }
116 190
117 if (length) 191 if (length)
118 *length = len; 192 *length = len;
193 if (status)
194 *status = 0;
119 195
120 psiconv_progress(lev+1,off+len-1, 196 psiconv_progress(lev+1,off+len-1,
121 "End of X length indicator (total length: %08x)", len); 197 "End of X length indicator (total length: %08x)", len);
122 198
123 return res; 199 return res;
200
201ERROR:
202 psiconv_warn(lev+1,off,"Reading of X indicator failed");
203 if (status)
204 *status = localstatus;
205 if (length)
206 *length = 0;
207 return 0;
124} 208}
125 209
126psiconv_length_t psiconv_read_length(const psiconv_buffer buf, int lev, 210psiconv_length_t psiconv_read_length(const psiconv_buffer buf, int lev,
127 psiconv_u32 off, int *length) 211 psiconv_u32 off, int *length, int *status)
128{ 212{
129 psiconv_length_t res; 213 psiconv_length_t res;
214 int localstatus;
215
130 res = (2.54/1440.0) * ((psiconv_s32) psiconv_read_u32(buf,lev,off)); 216 res = (2.54/1440.0) * ((psiconv_s32) psiconv_read_u32(buf,lev,off,
217 &localstatus));
218 if (localstatus) {
219 psiconv_warn(lev+1,off,"Reading of length failed");
220 if (length)
221 *length = 0;
222 if (status)
223 *status = localstatus;
224 return 0;
225 }
131 psiconv_debug(lev+1,off,"Length: %f",res); 226 psiconv_debug(lev+1,off,"Length: %f",res);
227 if (length)
228 *length = 4;
229 if (status)
230 *status = 0;
231 return res;
232}
233
234psiconv_size_t psiconv_read_size(const psiconv_buffer buf, int lev,
235 psiconv_u32 off, int *length, int *status)
236{
237 psiconv_size_t res;
238 int localstatus;
239 res = ((psiconv_s32) psiconv_read_u32(buf,lev,off,&localstatus)) / 20.0;
240 if (localstatus) {
241 psiconv_warn(lev+1,off,"Reading of size failed");
242 if (length)
243 *length = 0;
244 if (status)
245 *status = localstatus;
246 return 0;
247 }
248 psiconv_debug(lev+1,off,"Size: %f",res);
249 if (status)
250 *status = 0;
132 if (length) 251 if (length)
133 *length = 4; 252 *length = 4;
134 return res; 253 return res;
135} 254}
136 255
137psiconv_size_t psiconv_read_size(const psiconv_buffer buf, int lev,
138 psiconv_u32 off, int *length)
139{
140 psiconv_size_t res;
141 res = ((psiconv_s32) psiconv_read_u32(buf,lev,off)) / 20.0;
142 psiconv_debug(lev+1,off,"Size: %f",res);
143 if (length)
144 *length = 4;
145 return res;
146}
147
148int psiconv_parse_bool(const psiconv_buffer buf, int lev, psiconv_u32 off, 256int psiconv_parse_bool(const psiconv_buffer buf, int lev, psiconv_u32 off,
149 int *length, psiconv_bool_t *result) 257 int *length, psiconv_bool_t *result)
150{ 258{
151 psiconv_u8 temp; 259 psiconv_u8 temp;
260 int localstatus;
152 temp = psiconv_read_u8(buf,lev,off); 261 temp = psiconv_read_u8(buf,lev,off,&localstatus);
262 if (localstatus) {
263 psiconv_warn(lev+1,off,"Reading of bool failed");
264 if (length)
265 *length = 0;
266 return localstatus;
267 }
153 if (length) 268 if (length)
154 *length = 1; 269 *length = 1;
155 if (temp == 0) { 270 if (temp == 0) {
156 *result = psiconv_bool_false; 271 *result = psiconv_bool_false;
157 return 0; 272 return 0;
… …
160 return 0; 275 return 0;
161 } 276 }
162 psiconv_warn(lev+1,off,"Unknown value for boolean"); 277 psiconv_warn(lev+1,off,"Unknown value for boolean");
163 psiconv_debug(lev+1,off,"Boolean value: %02x",temp); 278 psiconv_debug(lev+1,off,"Boolean value: %02x",temp);
164 *result = psiconv_bool_true; 279 *result = psiconv_bool_true;
165 return -1; 280 return 0;
166} 281}
167 282
168psiconv_string_t psiconv_read_string(const psiconv_buffer buf,int lev, 283psiconv_string_t psiconv_read_string(const psiconv_buffer buf,int lev,
169 psiconv_u32 off,int *length) 284 psiconv_u32 off,int *length, int *status)
170{ 285{
171 int stringlen,i,leng,len; 286 int stringlen,i,leng,len,localstatus;
172 psiconv_string_t result; 287 psiconv_string_t result;
173 char *res_copy; 288 char *res_copy;
174 289
175 psiconv_progress(lev+1,off,"Going to read a string"); 290 psiconv_progress(lev+1,off,"Going to read a string");
176 291
177 stringlen = psiconv_read_S(buf,lev+2,off,&leng); 292 stringlen = psiconv_read_S(buf,lev+2,off,&leng,&localstatus);
293 if (localstatus)
294 goto ERROR1;
178 psiconv_debug(lev+2,off,"Length: %i",stringlen); 295 psiconv_debug(lev+2,off,"Length: %i",stringlen);
179 len = leng; 296 len = leng;
180 297
181 result = malloc(stringlen + 1); 298 result = malloc(stringlen + 1);
299 if (!result)
300 goto ERROR1;
182 for (i = 0; i < stringlen; i++) 301 for (i = 0; (i < stringlen) && !localstatus; i++)
183 result[i] = psiconv_read_u8(buf,lev,off+i+len); 302 result[i] = psiconv_read_u8(buf,lev,off+i+len,&localstatus);
303 if (localstatus)
304 goto ERROR2;
184 result[stringlen] = 0; 305 result[stringlen] = 0;
185 len += stringlen; 306 len += stringlen;
186 307
187 res_copy = psiconv_make_printable(result); 308 res_copy = psiconv_make_printable(result);
309 if (!res_copy)
310 goto ERROR2;
188 psiconv_debug(lev+2,off,"Contents: `%s'",res_copy); 311 psiconv_debug(lev+2,off,"Contents: `%s'",res_copy);
189 free(res_copy); 312 free(res_copy);
190 313
191 if (length) 314 if (length)
192 *length = len; 315 *length = len;
193 316
317 if (status)
318 *status = 0;
319
194 psiconv_progress(lev+1,off+len-1,"End of string (total length: %08x)",len); 320 psiconv_progress(lev+1,off+len-1,"End of string (total length: %08x)",len);
195 321
196 return result; 322 return result;
323
324ERROR2:
325 free(result);
326ERROR1:
327 psiconv_warn(lev+1,off,"Reading of string failed");
328 if (status)
329 *status = localstatus;
330 if (length)
331 *length = 0;
332 return NULL;
197} 333}
334
335psiconv_string_t psiconv_read_short_string(const psiconv_buffer buf,
336 int lev,
337 psiconv_u32 off,int *length, int *status)
338{
339 int stringlen,i,len,localstatus;
340 psiconv_string_t result;
341 char *res_copy;
342
343 psiconv_progress(lev+1,off,"Going to read a short string");
344
345 stringlen = psiconv_read_u8(buf,lev+2,off,&localstatus);
346 if (localstatus)
347 goto ERROR1;
348 psiconv_debug(lev+2,off,"Length: %i",stringlen);
349 len = 1;
350
351 result = malloc(stringlen + 1);
352 if (!result)
353 goto ERROR1;
354 for (i = 0; (i < stringlen) && !localstatus; i++)
355 result[i] = psiconv_read_u8(buf,lev,off+i+len,&localstatus);
356 if (localstatus)
357 goto ERROR2;
358 result[stringlen] = 0;
359 len += stringlen;
360
361 res_copy = psiconv_make_printable(result);
362 if (!res_copy)
363 goto ERROR2;
364 psiconv_debug(lev+2,off,"Contents: `%s'",res_copy);
365 free(res_copy);
366
367 if (length)
368 *length = len;
369
370 if (status)
371 *status = 0;
372
373 psiconv_progress(lev+1,off+len-1,"End of short string (total length: %08x)",
374 len);
375
376 return result;
377
378
379ERROR2:
380 free(result);
381ERROR1:
382 psiconv_warn(lev+1,off,"Reading of short string failed");
383 if (status)
384 *status = localstatus;
385 if (length)
386 *length = 0;
387 return NULL;
388}
389
390psiconv_float_t psiconv_read_float(const psiconv_buffer buf, int lev,
391 psiconv_u32 off, int *length, int *status)
392{
393 psiconv_float_t result,bitvalue;
394 int res,bit;
395 psiconv_u32 temp=0;
396
397 psiconv_progress(lev+1,off,"Going to read a float");
398
399 bitvalue = 0.5;
400 result = 1.0;
401 for (bit = 0x33; bit > 0; bit--) {
402 if ((bit == 0x33) || ((bit & 0x07) == 0x07))
403 temp = psiconv_read_u8(buf,lev+2,off+ (bit >> 3),&res);
404 if (res)
405 goto ERROR;
406 if (temp & (0x01 << (bit & 0x07)))
407 result += bitvalue;
408 bitvalue /= 2.0;
409 }
410 temp = psiconv_read_u16(buf,lev+2,off+6,&res);
411 if (res)
412 goto ERROR;
413 if (temp & 0x8000)
414 result = -result;
415 temp = (temp & 0x7ff0) >> 4;
416 result *= pow2(((int) temp)-0x3ff);
417 psiconv_debug(lev+1,off,"Float value: %f",result);
418 if (length)
419 *length = 8;
420 if (*status)
421 *status = res;
422 return result;
423ERROR:
424 psiconv_warn(lev+1,off,"Reading of float failed");
425 if (length)
426 *length = 0;
427 if (*status)
428 *status = res;
429 return 0.0;
430}
431
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