… | |
… | |
23 | #define MAGIC_C 1 /* compressed data follows */ |
23 | #define MAGIC_C 1 /* compressed data follows */ |
24 | #define MAGIC_undef 2 /* the special value undef */ |
24 | #define MAGIC_undef 2 /* the special value undef */ |
25 | #define MAGIC_CR 3 /* storable (reference, freeze), compressed */ |
25 | #define MAGIC_CR 3 /* storable (reference, freeze), compressed */ |
26 | #define MAGIC_R 4 /* storable (reference, freeze) */ |
26 | #define MAGIC_R 4 /* storable (reference, freeze) */ |
27 | #define MAGIC_CR_deref 5 /* storable (NO reference, freeze), compressed */ |
27 | #define MAGIC_CR_deref 5 /* storable (NO reference, freeze), compressed */ |
28 | #define MAGIC_R_deref 6 /* storable NO (reference, freeze) */ |
28 | #define MAGIC_R_deref 6 /* storable (NO reference, freeze) */ |
29 | #define MAGIC_HI 7 /* room for one higher storable major */ |
29 | #define MAGIC_HI 7 /* room for one higher storable major */ |
30 | |
30 | |
31 | #define IN_RANGE(v,l,h) ((unsigned int)((unsigned)(v) - (unsigned)(l)) <= (unsigned)(h) - (unsigned)(l)) |
31 | #define IN_RANGE(v,l,h) ((unsigned int)((unsigned)(v) - (unsigned)(l)) <= (unsigned)(h) - (unsigned)(l)) |
32 | |
32 | |
33 | static CV *storable_mstore, *storable_mretrieve; |
33 | static CV *storable_mstore, *storable_mretrieve; |
34 | |
34 | |
35 | static SV * |
35 | static SV * |
36 | compress_sv (SV *data, char cprepend, char uprepend) |
36 | compress_sv (SV *data, char cprepend, int uprepend) |
37 | { |
37 | { |
38 | STRLEN usize, csize; |
38 | STRLEN usize, csize; |
39 | char *src = (char *)SvPV (data, usize); |
39 | char *src = (char *)SvPV (data, usize); |
40 | |
40 | |
41 | if (usize) |
41 | if (usize) |
… | |
… | |
91 | |
91 | |
92 | if (csize) |
92 | if (csize) |
93 | { |
93 | { |
94 | SvCUR_set (ret, csize + skip); |
94 | SvCUR_set (ret, csize + skip); |
95 | } |
95 | } |
96 | else if (!uprepend) |
96 | else if (uprepend < 0) |
97 | { |
97 | { |
98 | SvREFCNT_dec (ret); |
98 | SvREFCNT_dec (ret); |
99 | ret = SvREFCNT_inc (data); |
99 | ret = SvREFCNT_inc (data); |
100 | } |
100 | } |
101 | else |
101 | else |
102 | { |
102 | { |
103 | *dst++ = 0; |
103 | *dst++ = uprepend; |
104 | |
104 | |
105 | Move ((void *)src, (void *)dst, usize, unsigned char); |
105 | Move ((void *)src, (void *)dst, usize, unsigned char); |
106 | |
106 | |
107 | SvCUR_set (ret, usize + 1); |
107 | SvCUR_set (ret, usize + 1); |
108 | } |
108 | } |
… | |
… | |
208 | void |
208 | void |
209 | compress(data) |
209 | compress(data) |
210 | SV * data |
210 | SV * data |
211 | PROTOTYPE: $ |
211 | PROTOTYPE: $ |
212 | PPCODE: |
212 | PPCODE: |
213 | XPUSHs (sv_2mortal (compress_sv (data, 0, 1))); |
213 | XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U))); |
214 | |
214 | |
215 | void |
215 | void |
216 | decompress(data) |
216 | decompress(data) |
217 | SV * data |
217 | SV * data |
218 | PROTOTYPE: $ |
218 | PROTOTYPE: $ |
… | |
… | |
226 | sfreeze_cr = 1 |
226 | sfreeze_cr = 1 |
227 | sfreeze_c = 2 |
227 | sfreeze_c = 2 |
228 | PROTOTYPE: $ |
228 | PROTOTYPE: $ |
229 | PPCODE: |
229 | PPCODE: |
230 | |
230 | |
|
|
231 | SvGETMAGIC (sv); |
|
|
232 | |
231 | if (!SvOK (sv)) |
233 | if (!SvOK (sv)) |
232 | XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
234 | XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
233 | else if (SvTYPE(sv) != SVt_IV |
235 | else if (SvTYPE(sv) != SVt_IV |
234 | && SvTYPE(sv) != SVt_NV |
236 | && SvTYPE(sv) != SVt_NV |
|
|
237 | && SvTYPE(sv) != SVt_PV |
235 | && SvTYPE(sv) != SVt_PV) /* mstore */ |
238 | && SvTYPE(sv) != SVt_PVMG+99999) /* mstore */ |
236 | { |
239 | { |
237 | int deref = !SvROK (sv); |
240 | int deref = !SvROK (sv); |
238 | |
241 | |
239 | if (!storable_mstore) |
242 | if (!storable_mstore) |
240 | need_storable (); |
243 | need_storable (); |
… | |
… | |
254 | sv = POPs; |
257 | sv = POPs; |
255 | |
258 | |
256 | if (SvPVX (sv)[0] != MAGIC_R) |
259 | if (SvPVX (sv)[0] != MAGIC_R) |
257 | croak ("Storable format changed, need newer version of Compress::LZF"); |
260 | croak ("Storable format changed, need newer version of Compress::LZF"); |
258 | |
261 | |
|
|
262 | if (deref) |
|
|
263 | SvPVX (sv)[0] = MAGIC_R_deref; |
|
|
264 | |
259 | if (ix) /* compress */ |
265 | if (ix) /* compress */ |
260 | XPUSHs (sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, 0))); |
266 | sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1)); |
261 | else |
|
|
262 | { |
|
|
263 | if (deref) |
|
|
264 | SvPVX (sv)[0] = MAGIC_R_deref; |
|
|
265 | |
267 | |
266 | XPUSHs (sv); |
268 | XPUSHs (sv); |
267 | } |
|
|
268 | } |
269 | } |
269 | else if (sv && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
270 | else if (SvTYPE (sv) == SVt_PV && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
270 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 1))); /* need to prefix only */ |
271 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U))); /* need to prefix only */ |
271 | else if (ix == 2) /* compress always */ |
272 | else if (ix == 2) /* compress always */ |
272 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 0))); |
273 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1))); |
273 | else /* don't compress */ |
274 | else /* don't compress */ |
274 | XPUSHs (sv_2mortal (SvREFCNT_inc (sv))); |
275 | XPUSHs (sv_2mortal (SvREFCNT_inc (sv))); |
275 | |
276 | |
276 | void |
277 | void |
277 | sthaw(sv) |
278 | sthaw(sv) |
… | |
… | |
296 | |
297 | |
297 | case MAGIC_C: |
298 | case MAGIC_C: |
298 | XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
299 | XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
299 | break; |
300 | break; |
300 | |
301 | |
|
|
302 | case MAGIC_R_deref: |
|
|
303 | deref = 1; |
|
|
304 | SvPVX (sv)[0] = MAGIC_R; |
|
|
305 | goto handle_MAGIC_R; |
|
|
306 | |
301 | case MAGIC_CR_deref: |
307 | case MAGIC_CR_deref: |
302 | deref = 1; |
308 | deref = 1; |
303 | case MAGIC_CR: |
309 | case MAGIC_CR: |
304 | sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
310 | sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
305 | case MAGIC_R_deref: |
311 | if (deref) |
306 | if (SvPVX (sv)[0] == MAGIC_R_deref) |
312 | if (SvPVX (sv)[0] == MAGIC_R_deref) |
307 | { |
|
|
308 | deref = 1; |
|
|
309 | SvPVX (sv)[0] = MAGIC_R; |
313 | SvPVX (sv)[0] = MAGIC_R; |
310 | } |
314 | else |
|
|
315 | croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
|
|
316 | |
311 | case MAGIC_R: |
317 | case MAGIC_R: |
|
|
318 | handle_MAGIC_R: |
312 | if (!storable_mstore) |
319 | if (!storable_mstore) |
313 | need_storable (); |
320 | need_storable (); |
314 | |
321 | |
315 | PUSHMARK (SP); |
322 | PUSHMARK (SP); |
316 | XPUSHs (sv); |
323 | XPUSHs (sv); |
… | |
… | |
321 | |
328 | |
322 | SPAGAIN; |
329 | SPAGAIN; |
323 | |
330 | |
324 | if (deref) |
331 | if (deref) |
325 | { |
332 | { |
326 | SV *ref = SvREFCNT_inc (SvRV (TOPs)); |
333 | SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs)))); |
327 | |
|
|
328 | SvREFCNT_dec (TOPs); /* destroy superfluous ref */ |
|
|
329 | SETs (ref); |
|
|
330 | |
334 | |
331 | if (SvPVX (sv)[0] == MAGIC_R) |
335 | if (SvPVX (sv)[0] == MAGIC_R) |
332 | SvPVX (sv)[0] = MAGIC_R; |
336 | SvPVX (sv)[0] = MAGIC_R_deref; |
333 | } |
337 | } |
334 | |
338 | else |
335 | XPUSHs (POPs); /* this is a nop, hopefully */ |
339 | XPUSHs (POPs); /* this is a nop, hopefully */ |
336 | |
340 | |
337 | break; |
341 | break; |
338 | |
342 | |
339 | default: |
343 | default: |
340 | croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
344 | croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |