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| 19 | |
19 | |
| 20 | #include "config.h" |
20 | #include "config.h" |
| 21 | #include "compat.h" |
21 | #include "compat.h" |
| 22 | |
22 | |
| 23 | #include <stdlib.h> |
23 | #include <stdlib.h> |
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24 | #include <math.h> |
| 24 | |
25 | |
| 25 | #include "parse_routines.h" |
26 | #include "parse_routines.h" |
| 26 | #include "error.h" |
27 | #include "error.h" |
| 27 | |
28 | |
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29 | /* Very inefficient, but good enough for now. By implementing it ourselves, |
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30 | we do not have to link with -lm */ |
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31 | psiconv_float_t pow2(int n) |
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32 | { |
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33 | psiconv_float_t res=1.0; |
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34 | int i; |
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35 | |
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36 | for (i = 0; i < (n<0?-n:n); i++) |
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37 | res *= 2.0; |
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38 | |
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39 | return n<0?1/res:res; |
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40 | } |
| 28 | psiconv_u8 psiconv_read_u8(const psiconv_buffer buf,int lev,psiconv_u32 off, |
41 | psiconv_u8 psiconv_read_u8(const psiconv_buffer buf,int lev,psiconv_u32 off, |
| 29 | int *status) |
42 | int *status) |
| 30 | { |
43 | { |
| 31 | psiconv_u8 *ptr; |
44 | psiconv_u8 *ptr; |
| 32 | ptr = psiconv_buffer_get(buf,off); |
45 | ptr = psiconv_buffer_get(buf,off); |
| … | |
… | |
| 301 | *status = localstatus; |
314 | *status = localstatus; |
| 302 | if (length) |
315 | if (length) |
| 303 | *length = 0; |
316 | *length = 0; |
| 304 | return NULL; |
317 | return NULL; |
| 305 | } |
318 | } |
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319 | |
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320 | psiconv_string_t psiconv_read_short_string(const psiconv_buffer buf, |
|
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321 | int lev, |
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322 | psiconv_u32 off,int *length, int *status) |
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323 | { |
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324 | int stringlen,i,len,localstatus; |
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325 | psiconv_string_t result; |
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326 | char *res_copy; |
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327 | |
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328 | psiconv_progress(lev+1,off,"Going to read a short string"); |
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329 | |
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330 | stringlen = psiconv_read_u8(buf,lev+2,off,&localstatus); |
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331 | if (localstatus) |
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332 | goto ERROR1; |
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333 | psiconv_debug(lev+2,off,"Length: %i",stringlen); |
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334 | len = 1; |
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335 | |
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336 | result = malloc(stringlen + 1); |
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337 | if (!result) |
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338 | goto ERROR1; |
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339 | for (i = 0; (i < stringlen) && !localstatus; i++) |
|
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340 | result[i] = psiconv_read_u8(buf,lev,off+i+len,&localstatus); |
|
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341 | if (localstatus) |
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342 | goto ERROR2; |
|
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343 | result[stringlen] = 0; |
|
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344 | len += stringlen; |
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345 | |
|
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346 | res_copy = psiconv_make_printable(result); |
|
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347 | if (!res_copy) |
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348 | goto ERROR2; |
|
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349 | psiconv_debug(lev+2,off,"Contents: `%s'",res_copy); |
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350 | free(res_copy); |
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351 | |
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352 | if (length) |
|
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353 | *length = len; |
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354 | |
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355 | if (status) |
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356 | *status = 0; |
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357 | |
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358 | psiconv_progress(lev+1,off+len-1,"End of short string (total length: %08x)", |
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359 | len); |
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360 | |
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361 | return result; |
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362 | |
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363 | |
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364 | ERROR2: |
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365 | free(result); |
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366 | ERROR1: |
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367 | psiconv_warn(lev+1,off,"Reading of short string failed"); |
|
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368 | if (status) |
|
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369 | *status = localstatus; |
|
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370 | if (length) |
|
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371 | *length = 0; |
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372 | return NULL; |
|
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373 | } |
|
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374 | |
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375 | psiconv_float_t psiconv_read_float(const psiconv_buffer buf, int lev, |
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376 | psiconv_u32 off, int *length, int *status) |
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377 | { |
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378 | psiconv_float_t result,bitvalue; |
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379 | int res,bit; |
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380 | psiconv_u32 temp=0; |
|
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381 | |
|
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382 | psiconv_progress(lev+1,off,"Going to read a float"); |
|
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383 | |
|
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384 | bitvalue = 0.5; |
|
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385 | result = 1.0; |
|
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386 | for (bit = 0x33; bit > 0; bit--) { |
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387 | if ((bit == 0x33) || ((bit & 0x07) == 0x07)) |
|
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388 | temp = psiconv_read_u8(buf,lev+2,off+ (bit >> 3),&res); |
|
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389 | if (res) |
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390 | goto ERROR; |
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391 | if (temp & (0x01 << (bit & 0x07))) |
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392 | result += bitvalue; |
|
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393 | bitvalue /= 2.0; |
|
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394 | } |
|
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395 | temp = psiconv_read_u16(buf,lev+2,off+6,&res); |
|
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396 | if (res) |
|
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397 | goto ERROR; |
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398 | if (temp & 0x8000) |
|
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399 | result = -result; |
|
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400 | temp = (temp & 0x7ff0) >> 4; |
|
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401 | result *= pow2(((int) temp)-0x3ff); |
|
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402 | psiconv_debug(lev+1,off,"Float value: %f",result); |
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403 | if (length) |
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404 | *length = 8; |
|
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405 | if (*status) |
|
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406 | *status = res; |
|
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407 | return result; |
|
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408 | ERROR: |
|
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409 | psiconv_warn(lev+1,off,"Reading of float failed"); |
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410 | if (length) |
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411 | *length = 0; |
|
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412 | if (*status) |
|
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413 | *status = res; |
|
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414 | return 0.0; |
|
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415 | } |
|
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416 | |
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