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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 | |
| 28 | psiconv_u8 psiconv_read_u8(const psiconv_buffer buf,int lev,psiconv_u32 off, |
29 | psiconv_u8 psiconv_read_u8(const psiconv_buffer buf,int lev,psiconv_u32 off, |
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… | |
| 301 | *status = localstatus; |
302 | *status = localstatus; |
| 302 | if (length) |
303 | if (length) |
| 303 | *length = 0; |
304 | *length = 0; |
| 304 | return NULL; |
305 | return NULL; |
| 305 | } |
306 | } |
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307 | |
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308 | psiconv_float_t psiconv_read_float(const psiconv_buffer buf, int lev, |
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309 | psiconv_u32 off, int *length, int *status) |
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310 | { |
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311 | psiconv_float_t result,bitvalue; |
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312 | int res,bit; |
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313 | psiconv_u32 temp=0; |
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314 | |
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315 | psiconv_progress(lev+1,off,"Going to read a float"); |
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316 | |
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317 | bitvalue = 0.5; |
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318 | result = 1.0; |
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319 | for (bit = 0x33; bit > 0; bit--) { |
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320 | if ((bit == 0x33) || ((bit & 0x07) == 0x07)) |
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321 | temp = psiconv_read_u8(buf,lev+2,off+ (bit >> 3),&res); |
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322 | if (res) |
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323 | goto ERROR; |
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324 | if (temp & (0x01 << (bit & 0x07))) |
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325 | result += bitvalue; |
|
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326 | bitvalue /= 2.0; |
|
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327 | } |
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328 | temp = psiconv_read_u16(buf,lev+2,off+6,&res); |
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329 | if (res) |
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330 | goto ERROR; |
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331 | if (temp & 0x8000) |
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332 | result = -result; |
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333 | temp = (temp & 0x7ff0) >> 4; |
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334 | result *= pow(2.0,((int) temp)-0x3ff); |
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335 | psiconv_debug(lev+1,off,"Float value: %f",result); |
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336 | if (length) |
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337 | *length = 8; |
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338 | if (*status) |
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339 | *status = res; |
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340 | return result; |
|
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341 | ERROR: |
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342 | psiconv_warn(lev+1,off,"Reading of float failed"); |
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343 | if (length) |
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344 | *length = 0; |
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345 | if (*status) |
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346 | *status = res; |
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347 | return 0.0; |
|
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348 | } |
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