… | |
… | |
19 | |
19 | |
20 | /* we re-use the storable header for our purposes */ |
20 | /* we re-use the storable header for our purposes */ |
21 | #define MAGIC_LO 0 |
21 | #define MAGIC_LO 0 |
22 | #define MAGIC_U 0 /* uncompressed data follows */ |
22 | #define MAGIC_U 0 /* uncompressed data follows */ |
23 | #define MAGIC_C 1 /* compressed data follows */ |
23 | #define MAGIC_C 1 /* compressed data follows */ |
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24 | #define MAGIC_undef 2 /* the special value undef */ |
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|
25 | #define MAGIC_CR 3 /* storable (reference, freeze), compressed */ |
24 | #define MAGIC_R 4 /* storable (reference, freeze) */ |
26 | #define MAGIC_R 4 /* storable (reference, freeze) */ |
25 | #define MAGIC_CR 3 /* storable (reference, freeze), compressed */ |
27 | #define MAGIC_CR_deref 5 /* storable (NO reference, freeze), compressed */ |
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|
28 | #define MAGIC_R_deref 6 /* storable (NO reference, freeze) */ |
26 | #define MAGIC_HI 7 /* room for one higher storable major */ |
29 | #define MAGIC_HI 7 /* room for one higher storable major */ |
27 | |
30 | |
28 | #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)) |
29 | |
32 | |
30 | static CV *storable_mstore, *storable_mretrieve; |
33 | static CV *storable_mstore, *storable_mretrieve; |
31 | |
34 | |
32 | static SV * |
35 | static SV * |
33 | compress_sv (SV *data, char cprepend, char uprepend) |
36 | compress_sv (SV *data, char cprepend, int uprepend) |
34 | { |
37 | { |
35 | STRLEN usize, csize; |
38 | STRLEN usize, csize; |
36 | char *src = (char *)SvPV (data, usize); |
39 | char *src = (char *)SvPV (data, usize); |
37 | |
40 | |
38 | if (usize) |
41 | if (usize) |
… | |
… | |
88 | |
91 | |
89 | if (csize) |
92 | if (csize) |
90 | { |
93 | { |
91 | SvCUR_set (ret, csize + skip); |
94 | SvCUR_set (ret, csize + skip); |
92 | } |
95 | } |
93 | else if (!uprepend) |
96 | else if (uprepend < 0) |
94 | { |
97 | { |
95 | SvREFCNT_dec (ret); |
98 | SvREFCNT_dec (ret); |
96 | ret = SvREFCNT_inc (data); |
99 | ret = SvREFCNT_inc (data); |
97 | } |
100 | } |
98 | else |
101 | else |
99 | { |
102 | { |
100 | *dst++ = 0; |
103 | *dst++ = uprepend; |
101 | |
104 | |
102 | Move ((void *)src, (void *)dst, usize, unsigned char); |
105 | Move ((void *)src, (void *)dst, usize, unsigned char); |
103 | |
106 | |
104 | SvCUR_set (ret, usize + 1); |
107 | SvCUR_set (ret, usize + 1); |
105 | } |
108 | } |
… | |
… | |
205 | void |
208 | void |
206 | compress(data) |
209 | compress(data) |
207 | SV * data |
210 | SV * data |
208 | PROTOTYPE: $ |
211 | PROTOTYPE: $ |
209 | PPCODE: |
212 | PPCODE: |
210 | XPUSHs (sv_2mortal (compress_sv (data, 0, 1))); |
213 | XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U))); |
211 | |
214 | |
212 | void |
215 | void |
213 | decompress(data) |
216 | decompress(data) |
214 | SV * data |
217 | SV * data |
215 | PROTOTYPE: $ |
218 | PROTOTYPE: $ |
… | |
… | |
223 | sfreeze_cr = 1 |
226 | sfreeze_cr = 1 |
224 | sfreeze_c = 2 |
227 | sfreeze_c = 2 |
225 | PROTOTYPE: $ |
228 | PROTOTYPE: $ |
226 | PPCODE: |
229 | PPCODE: |
227 | |
230 | |
228 | if (SvROK (sv)) /* mstore */ |
231 | SvGETMAGIC (sv); |
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232 | |
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233 | if (!SvOK (sv)) |
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234 | XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
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235 | else if (SvROK (sv) |
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236 | || (SvTYPE(sv) != SVt_IV |
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237 | && SvTYPE(sv) != SVt_NV |
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238 | && SvTYPE(sv) != SVt_PV |
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239 | && SvTYPE(sv) != SVt_PVMG)) /* mstore */ |
229 | { |
240 | { |
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241 | int deref = !SvROK (sv); |
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|
242 | |
230 | if (!storable_mstore) |
243 | if (!storable_mstore) |
231 | need_storable (); |
244 | need_storable (); |
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245 | |
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246 | if (deref) |
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247 | sv = newRV_noinc (sv); |
232 | |
248 | |
233 | PUSHMARK (SP); |
249 | PUSHMARK (SP); |
234 | XPUSHs (sv); |
250 | XPUSHs (sv); |
235 | PUTBACK; |
251 | PUTBACK; |
236 | |
252 | |
… | |
… | |
242 | sv = POPs; |
258 | sv = POPs; |
243 | |
259 | |
244 | if (SvPVX (sv)[0] != MAGIC_R) |
260 | if (SvPVX (sv)[0] != MAGIC_R) |
245 | croak ("Storable format changed, need newer version of Compress::LZF"); |
261 | croak ("Storable format changed, need newer version of Compress::LZF"); |
246 | |
262 | |
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|
263 | if (deref) |
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264 | SvPVX (sv)[0] = MAGIC_R_deref; |
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265 | |
247 | if (ix) /* compress */ |
266 | if (ix) /* compress */ |
248 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_CR, 0))); |
267 | sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1)); |
249 | else |
268 | |
250 | XPUSHs (sv); |
269 | XPUSHs (sv); |
251 | } |
270 | } |
252 | else if (IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
271 | else if (SvTYPE (sv) == SVt_PV && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
253 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 1))); /* need to prefix only */ |
272 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U))); /* need to prefix only */ |
254 | else if (ix == 2) /* compress always */ |
273 | else if (ix == 2) /* compress always */ |
255 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 0))); |
274 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1))); |
256 | else /* don't compress */ |
275 | else /* don't compress */ |
257 | XPUSHs (sv_2mortal (SvREFCNT_inc (sv))); |
276 | XPUSHs (sv_2mortal (SvREFCNT_inc (sv))); |
258 | |
277 | |
259 | void |
278 | void |
260 | sthaw(sv) |
279 | sthaw(sv) |
261 | SV * sv |
280 | SV * sv |
262 | PROTOTYPE: $ |
281 | PROTOTYPE: $ |
263 | PPCODE: |
282 | PPCODE: |
264 | char hdr = SvPVX (sv)[0]; |
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265 | |
283 | |
266 | if (IN_RANGE (hdr, MAGIC_LO, MAGIC_HI)) |
284 | int deref = 0; |
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285 | |
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286 | SvGETMAGIC (sv); |
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287 | if (SvPOK (sv) && IN_RANGE (SvPV_nolen (sv)[0], MAGIC_LO, MAGIC_HI)) |
267 | { |
288 | { |
268 | switch (SvPVX (sv)[0]) |
289 | switch (SvPVX (sv)[0]) |
269 | { |
290 | { |
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291 | case MAGIC_undef: |
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292 | XPUSHs (sv_2mortal (NEWSV (0, 0))); |
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293 | break; |
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294 | |
270 | case MAGIC_U: |
295 | case MAGIC_U: |
271 | XPUSHs (sv_2mortal (decompress_sv (sv, 0))); |
296 | XPUSHs (sv_2mortal (decompress_sv (sv, 0))); |
272 | break; |
297 | break; |
273 | |
298 | |
274 | case MAGIC_C: |
299 | case MAGIC_C: |
275 | XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
300 | XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
276 | break; |
301 | break; |
277 | |
302 | |
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303 | case MAGIC_R_deref: |
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304 | deref = 1; |
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305 | SvPVX (sv)[0] = MAGIC_R; |
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306 | goto handle_MAGIC_R; |
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307 | |
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308 | case MAGIC_CR_deref: |
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309 | deref = 1; |
278 | case MAGIC_CR: |
310 | case MAGIC_CR: |
279 | sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
311 | sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
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312 | if (deref) |
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313 | if (SvPVX (sv)[0] == MAGIC_R_deref) |
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314 | SvPVX (sv)[0] = MAGIC_R; |
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315 | else |
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316 | croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
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317 | |
280 | case MAGIC_R: |
318 | case MAGIC_R: |
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|
319 | handle_MAGIC_R: |
281 | if (!storable_mstore) |
320 | if (!storable_mstore) |
282 | need_storable (); |
321 | need_storable (); |
283 | |
322 | |
284 | PUSHMARK (SP); |
323 | PUSHMARK (SP); |
285 | XPUSHs (sv); |
324 | XPUSHs (sv); |
… | |
… | |
288 | if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
327 | if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
289 | croak ("Storable::mstore didn't return a single scalar"); |
328 | croak ("Storable::mstore didn't return a single scalar"); |
290 | |
329 | |
291 | SPAGAIN; |
330 | SPAGAIN; |
292 | |
331 | |
293 | /*XPUSHs (POPs);*/ |
332 | if (deref) |
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|
333 | { |
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334 | SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs)))); |
|
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335 | |
|
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336 | if (SvPVX (sv)[0] == MAGIC_R) |
|
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337 | SvPVX (sv)[0] = MAGIC_R_deref; |
|
|
338 | } |
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339 | else |
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340 | XPUSHs (POPs); /* this is a nop, hopefully */ |
294 | |
341 | |
295 | break; |
342 | break; |
296 | |
343 | |
297 | default: |
344 | default: |
298 | croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
345 | croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
299 | } |
346 | } |
300 | } |
347 | } |
301 | else |
348 | else |
302 | XPUSHs (sv_2mortal (SvREFCNT_inc (sv))); |
349 | XPUSHs (sv_2mortal (newSVsv (sv))); |