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Comparing Compress-LZF/LZF.xs (file contents):
Revision 1.22 by root, Wed Sep 27 19:01:48 2006 UTC vs.
Revision 1.34 by root, Mon Jun 29 23:51:28 2015 UTC

1#include "EXTERN.h" 1#include "EXTERN.h"
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5/* try to be compatible with older perls */ 5#include "perlmulticore.h"
6/* SvPV_nolen() macro first defined in 5.005_55 */ 6
7/* this is slow, not threadsafe, but works */ 7#define LZF_STANDALONE 1
8#include "patchlevel.h" 8#define LZF_STATE_ARG 1
9#if (PATCHLEVEL == 4) || ((PATCHLEVEL == 5) && (SUBVERSION < 55))
10static STRLEN nolen_na;
11# define SvPV_nolen(sv) SvPV ((sv), nolen_na)
12#endif
13#if PATCHLEVEL < 6
14# define call_sv perl_call_sv
15#endif
16 9
17#include "lzf_c.c" 10#include "lzf_c.c"
18#include "lzf_d.c" 11#include "lzf_d.c"
12#include "lzf_c_best.c"
19 13
20/* we re-use the storable header for our purposes */ 14/* we re-use the storable header for our purposes */
21#define MAGIC_LO 0 15#define MAGIC_LO 0
22#define MAGIC_U 0 /* uncompressed data follows */ 16#define MAGIC_U 0 /* uncompressed data follows */
23#define MAGIC_C 1 /* compressed data follows */ 17#define MAGIC_C 1 /* compressed data follows */
… …
39#else 33#else
40# define MAX_LENGTH ((Size_t) 0x8000000L) 34# define MAX_LENGTH ((Size_t) 0x8000000L)
41#endif 35#endif
42 36
43static SV * 37static SV *
44compress_sv (SV *data, char cprepend, int uprepend) 38compress_sv (SV *data, char cprepend, int uprepend, int best)
45{ 39{
40 void *state;
46 STRLEN usize, csize; 41 STRLEN usize, csize;
47 char *src = (char *)SvPV (data, usize); 42 char *src = (char *)SvPVbyte (data, usize);
48 43
49 if (usize) 44 if (usize)
50 { 45 {
51 SV *ret = NEWSV (0, usize + 1); 46 SV *ret = NEWSV (0, usize + 1);
52 unsigned char *dst; 47 unsigned char *dst;
… …
60 55
61 if (usize <= 0x7f) 56 if (usize <= 0x7f)
62 { 57 {
63 dst[skip++] = usize; 58 dst[skip++] = usize;
64 } 59 }
65 else if (usize <= 0x7ff) 60 else if (usize <= 0x7ff)
66 { 61 {
67 dst[skip++] = (( usize >> 6) | 0xc0); 62 dst[skip++] = (( usize >> 6) | 0xc0);
68 dst[skip++] = (( usize & 0x3f) | 0x80); 63 dst[skip++] = (( usize & 0x3f) | 0x80);
69 } 64 }
70 else if (usize <= 0xffff) 65 else if (usize <= 0xffff)
71 { 66 {
72 dst[skip++] = (( usize >> 12) | 0xe0); 67 dst[skip++] = (( usize >> 12) | 0xe0);
73 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); 68 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80);
74 dst[skip++] = (( usize & 0x3f) | 0x80); 69 dst[skip++] = (( usize & 0x3f) | 0x80);
75 } 70 }
76 else if (usize <= 0x1fffff) 71 else if (usize <= 0x1fffff)
77 { 72 {
78 dst[skip++] = (( usize >> 18) | 0xf0); 73 dst[skip++] = (( usize >> 18) | 0xf0);
79 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); 74 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80);
80 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); 75 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80);
81 dst[skip++] = (( usize & 0x3f) | 0x80); 76 dst[skip++] = (( usize & 0x3f) | 0x80);
82 } 77 }
83 else if (usize <= 0x3ffffff) 78 else if (usize <= 0x3ffffff)
84 { 79 {
85 dst[skip++] = (( usize >> 24) | 0xf8); 80 dst[skip++] = (( usize >> 24) | 0xf8);
86 dst[skip++] = (((usize >> 18) & 0x3f) | 0x80); 81 dst[skip++] = (((usize >> 18) & 0x3f) | 0x80);
87 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); 82 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80);
88 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); 83 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80);
89 dst[skip++] = (( usize & 0x3f) | 0x80); 84 dst[skip++] = (( usize & 0x3f) | 0x80);
90 } 85 }
91 else if (usize <= 0x7fffffff) 86 else if (usize <= 0x7fffffff)
92 { 87 {
93 dst[skip++] = (( usize >> 30) | 0xfc); 88 dst[skip++] = (( usize >> 30) | 0xfc);
94 dst[skip++] = (((usize >> 24) & 0x3f) | 0x80); 89 dst[skip++] = (((usize >> 24) & 0x3f) | 0x80);
95 dst[skip++] = (((usize >> 18) & 0x3f) | 0x80); 90 dst[skip++] = (((usize >> 18) & 0x3f) | 0x80);
96 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); 91 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80);
… …
98 dst[skip++] = (( usize & 0x3f) | 0x80); 93 dst[skip++] = (( usize & 0x3f) | 0x80);
99 } 94 }
100 else 95 else
101 croak ("compress can only compress up to %ld bytes", 0x7fffffffL); 96 croak ("compress can only compress up to %ld bytes", 0x7fffffffL);
102 97
98 if (usize > 2000) perlinterp_release ();
99
100 state = malloc (best ? sizeof (LZF_STATE_BEST) : sizeof (LZF_STATE));
101 if (!state)
102 {
103 if (usize > 2000) perlinterp_acquire ();
104 croak ("Compress::LZF unable to allocate memory for compression state");
105 }
106
103 /* 11 bytes is the smallest compressible string */ 107 /* 11 bytes is the smallest compressible string */
104 csize = usize < 11 ? 0 : 108 csize = usize < 11 ? 0 :
105 lzf_compress (src, usize, 109 (best ? lzf_compress_best (src, usize, dst + skip, usize - skip, *(LZF_STATE_BEST *)state)
106 dst + skip, 110 : lzf_compress (src, usize, dst + skip, usize - skip, *(LZF_STATE *)state));
107 usize - skip); 111
112 free (state);
113
114 if (usize > 2000) perlinterp_acquire ();
108 115
109 if (csize) 116 if (csize)
110 { 117 {
111 SvCUR_set (ret, csize + skip); 118 SvCUR_set (ret, csize + skip);
112 } 119 }
… …
132 139
133static SV * 140static SV *
134decompress_sv (SV *data, int skip) 141decompress_sv (SV *data, int skip)
135{ 142{
136 STRLEN usize, csize; 143 STRLEN usize, csize;
137 unsigned char *src = (unsigned char *)SvPV (data, csize) + skip; 144 unsigned char *src = (unsigned char *)SvPVbyte (data, csize) + skip;
138 145
139 if (csize) 146 if (csize)
140 { 147 {
141 void *dst; 148 void *dst;
142 SV *ret; 149 SV *ret;
150 int res;
143 151
144 csize -= skip; 152 csize -= skip;
145 153
146 if (src[0]) 154 if (src[0])
147 { 155 {
… …
193 else 201 else
194 croak ("compressed data corrupted (invalid length)"); 202 croak ("compressed data corrupted (invalid length)");
195 203
196 if (!usize) 204 if (!usize)
197 croak ("compressed data corrupted (invalid length)"); 205 croak ("compressed data corrupted (invalid length)");
198 206
199 ret = NEWSV (0, usize); 207 ret = NEWSV (0, usize);
200 SvPOK_only (ret); 208 SvPOK_only (ret);
201 dst = SvPVX (ret); 209 dst = SvPVX (ret);
202 210
211 if (usize > 4000) perlinterp_release ();
203 if (lzf_decompress (src, csize, dst, usize) != usize) 212 res = lzf_decompress (src, csize, dst, usize) != usize;
213 if (usize > 4000) perlinterp_acquire ();
214
215 if (res)
204 { 216 {
205 SvREFCNT_dec (ret); 217 SvREFCNT_dec (ret);
206 croak ("compressed data corrupted (size mismatch)", csize, skip, usize); 218 croak ("compressed data corrupted (size mismatch)", csize, skip, usize);
207 } 219 }
208 } 220 }
… …
222 else 234 else
223 return newSVpvn ("", 0); 235 return newSVpvn ("", 0);
224} 236}
225 237
226static void 238static void
227need_storable(void) 239need_storable (void)
228{ 240{
229#if PATCHLEVEL < 6 241 eval_sv (sv_2mortal (newSVpvf ("require %s", SvPVbyte_nolen (serializer_package))), G_VOID | G_DISCARD);
230 char req[8192];
231 sprintf (req, "require %s;", SvPV_nolen (serializer_package));
232 perl_eval_pv (req, 1);
233#else
234 load_module (PERL_LOADMOD_NOIMPORT, serializer_package, Nullsv);
235#endif
236 242
237 storable_mstore = GvCV (gv_fetchpv (SvPV_nolen (serializer_mstore ), TRUE, SVt_PVCV)); 243 storable_mstore = (CV *)SvREFCNT_inc (GvCV (gv_fetchpv (SvPVbyte_nolen (serializer_mstore ), TRUE, SVt_PVCV)));
238 storable_mretrieve = GvCV (gv_fetchpv (SvPV_nolen (serializer_mretrieve), TRUE, SVt_PVCV)); 244 storable_mretrieve = (CV *)SvREFCNT_inc (GvCV (gv_fetchpv (SvPVbyte_nolen (serializer_mretrieve), TRUE, SVt_PVCV)));
239} 245}
240 246
241MODULE = Compress::LZF PACKAGE = Compress::LZF 247MODULE = Compress::LZF PACKAGE = Compress::LZF
242 248
243BOOT: 249BOOT:
… …
253 PROTOTYPE: $$$ 259 PROTOTYPE: $$$
254 PPCODE: 260 PPCODE:
255 SvSetSV (serializer_package , package ); 261 SvSetSV (serializer_package , package );
256 SvSetSV (serializer_mstore , mstore ); 262 SvSetSV (serializer_mstore , mstore );
257 SvSetSV (serializer_mretrieve, mretrieve); 263 SvSetSV (serializer_mretrieve, mretrieve);
258 storable_mstore = 264 SvREFCNT_dec (storable_mstore ); storable_mstore = 0;
259 storable_mretrieve = 0; 265 SvREFCNT_dec (storable_mretrieve); storable_mretrieve = 0;
260 266
261void 267void
262compress(data) 268compress(data)
263 SV * data 269 SV * data
270 ALIAS:
271 compress_best = 1
264 PROTOTYPE: $ 272 PROTOTYPE: $
265 PPCODE: 273 PPCODE:
266 XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U))); 274 XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U, ix)));
267 275
268void 276void
269decompress(data) 277decompress(data)
270 SV * data 278 SV * data
271 PROTOTYPE: $ 279 PROTOTYPE: $
… …
274 282
275void 283void
276sfreeze(sv) 284sfreeze(sv)
277 SV * sv 285 SV * sv
278 ALIAS: 286 ALIAS:
287 sfreeze = 0
279 sfreeze_cr = 1 288 sfreeze_cr = 1
280 sfreeze_c = 2 289 sfreeze_c = 2
290 sfreeze_best = 4
291 sfreeze_cr_best = 5
292 sfreeze_c_best = 6
281 PROTOTYPE: $ 293 PROTOTYPE: $
282 PPCODE: 294 PPCODE:
295{
296 int best = ix & 4;
297 ix &= 3;
283 298
284 SvGETMAGIC (sv); 299 SvGETMAGIC (sv);
285 300
286 if (!SvOK (sv)) 301 if (!SvOK (sv))
287 XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ 302 XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */
288 else if (SvROK (sv) 303 else if (SvROK (sv)
304 || SvUTF8 (sv)
289 || (SvTYPE(sv) != SVt_IV 305 || (SvTYPE(sv) != SVt_IV
290 && SvTYPE(sv) != SVt_NV 306 && SvTYPE(sv) != SVt_NV
291 && SvTYPE(sv) != SVt_PV 307 && SvTYPE(sv) != SVt_PV
292 && SvTYPE(sv) != SVt_PVIV 308 && SvTYPE(sv) != SVt_PVIV
293 && SvTYPE(sv) != SVt_PVNV 309 && SvTYPE(sv) != SVt_PVNV
294 && SvTYPE(sv) != SVt_PVMG)) /* mstore */ 310 && SvTYPE(sv) != SVt_PVMG)) /* mstore */
295 { 311 {
296 int deref = !SvROK (sv); 312 int deref = !SvROK (sv);
313 char *pv;
297 314
298 if (!storable_mstore) 315 if (!storable_mstore)
316 {
317 PUTBACK;
299 need_storable (); 318 need_storable ();
319 SPAGAIN;
320 }
300 321
301 if (deref) 322 if (deref)
302 sv = newRV_noinc (sv); 323 sv = newRV_noinc (sv);
303 324
304 PUSHMARK (SP); 325 PUSHMARK (SP);
305 XPUSHs (sv); 326 XPUSHs (sv);
306 PUTBACK; 327 PUTBACK;
307 328
308 if (1 != call_sv ((SV *)storable_mstore, G_SCALAR)) 329 if (1 != call_sv ((SV *)storable_mstore, G_SCALAR))
309 croak ("Storable::mstore didn't return a single scalar"); 330 croak ("%s didn't return a single scalar", SvPVbyte_nolen (serializer_mstore));
310 331
311 SPAGAIN; 332 SPAGAIN;
312 333
313 sv = POPs; 334 sv = POPs;
335 pv = SvPV_nolen (sv);
314 336
315 if (SvPVX (sv)[0] == MAGIC_R) 337 if (*pv == MAGIC_R)
316 { 338 {
317 if (deref) 339 if (deref)
318 SvPVX (sv)[0] = MAGIC_R_deref; 340 *pv = MAGIC_R_deref;
319 } 341 }
320 else 342 else
321 { 343 {
322 char pfx[2]; 344 char pfx[2];
323 345
… …
326 348
327 sv_insert (sv, 0, 0, pfx, 2); 349 sv_insert (sv, 0, 0, pfx, 2);
328 } 350 }
329 351
330 if (ix) /* compress */ 352 if (ix) /* compress */
331 sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1)); 353 sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1, best));
332 354
333 XPUSHs (sv); 355 XPUSHs (sv);
334 } 356 }
335 else if (SvPOKp (sv) && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) 357 else if (SvPOKp (sv) && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI))
336 XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U))); /* need to prefix only */ 358 XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U, best))); /* need to prefix only */
337 else if (ix == 2) /* compress always */ 359 else if (ix == 2) /* compress always */
338 XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1))); 360 XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1, best)));
339 else if (SvNIOK (sv)) /* don't compress */ 361 else if (SvNIOK (sv)) /* don't compress */
340 { 362 {
341 STRLEN len; 363 STRLEN len;
342 char *s = SvPV (sv, len); 364 char *s = SvPV (sv, len);
343 XPUSHs (sv_2mortal (newSVpvn (s, len))); 365 XPUSHs (sv_2mortal (newSVpvn (s, len)));
344 } 366 }
345 else /* don't compress */ 367 else /* don't compress */
346 XPUSHs (sv_2mortal (newSVsv (sv))); 368 XPUSHs (sv_2mortal (newSVsv (sv)));
369}
347 370
348void 371void
349sthaw(sv) 372sthaw(sv)
350 SV * sv 373 SV * sv
351 PROTOTYPE: $ 374 PROTOTYPE: $
… …
353{ 376{
354 STRLEN svlen; 377 STRLEN svlen;
355 int deref = 0; 378 int deref = 0;
356 379
357 SvGETMAGIC (sv); 380 SvGETMAGIC (sv);
358 if (SvPOK (sv) && IN_RANGE (SvPV (sv, svlen)[0], MAGIC_LO, MAGIC_HI)) 381 if (SvPOK (sv) && IN_RANGE (SvPVbyte (sv, svlen)[0], MAGIC_LO, MAGIC_HI))
359 { 382 {
360 redo: 383 redo:
361 384
362 switch (SvPVX (sv)[0]) 385 switch (SvPVX (sv)[0])
363 { 386 {
… …
372 croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); 395 croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?");
373 396
374 sv_chop (sv, SvPVX (sv) + 2); 397 sv_chop (sv, SvPVX (sv) + 2);
375 398
376 if (!storable_mstore) 399 if (!storable_mstore)
400 {
401 PUTBACK;
377 need_storable (); 402 need_storable ();
403 SPAGAIN;
404 }
378 405
379 PUSHMARK (SP); 406 PUSHMARK (SP);
380 XPUSHs (sv); 407 XPUSHs (sv);
381 PUTBACK; 408 PUTBACK;
382 409
383 if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) 410 if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR))
384 croak ("Storable::mstore didn't return a single scalar"); 411 croak ("%s didn't return a single scalar", SvPVbyte_nolen (serializer_mretrieve));
385 412
386 SPAGAIN; 413 SPAGAIN;
387 414
388 if (deref) 415 if (deref)
389 SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs)))); 416 SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs))));
… …
416 goto redo; 443 goto redo;
417 444
418 case MAGIC_R: 445 case MAGIC_R:
419 handle_MAGIC_R: 446 handle_MAGIC_R:
420 if (!storable_mstore) 447 if (!storable_mstore)
448 {
449 PUTBACK;
421 need_storable (); 450 need_storable ();
451 SPAGAIN;
452 }
422 453
423 PUSHMARK (SP); 454 PUSHMARK (SP);
424 XPUSHs (sv); 455 XPUSHs (sv);
425 PUTBACK; 456 PUTBACK;
426 457
427 if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) 458 if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR))
428 croak ("Storable::mstore didn't return a single scalar"); 459 croak ("%s didn't return a single scalar", SvPVbyte_nolen (serializer_mretrieve));
429 460
430 SPAGAIN; 461 SPAGAIN;
431 462
432 if (deref) 463 if (deref)
433 { 464 {
… …
437 SvPVX (sv)[0] = MAGIC_R_deref; 468 SvPVX (sv)[0] = MAGIC_R_deref;
438 } 469 }
439 else 470 else
440 SETs (sv_2mortal (newSVsv (TOPs))); 471 SETs (sv_2mortal (newSVsv (TOPs)));
441 472
442 break; 473 break;
443 474
444 default: 475 default:
445 croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); 476 croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?");
446 } 477 }
447 } 478 }

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