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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 */ |
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) */ |
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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) */ |
27 | #define MAGIC_HI 7 /* room for one higher storable major */ |
29 | #define MAGIC_HI 7 /* room for one higher storable major */ |
28 | |
30 | |
29 | #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)) |
30 | |
32 | |
31 | static CV *storable_mstore, *storable_mretrieve; |
33 | static CV *storable_mstore, *storable_mretrieve; |
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228 | |
230 | |
229 | if (!SvOK (sv)) |
231 | if (!SvOK (sv)) |
230 | XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
232 | XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
231 | else if (SvTYPE(sv) != SVt_IV |
233 | else if (SvTYPE(sv) != SVt_IV |
232 | && SvTYPE(sv) != SVt_NV |
234 | && SvTYPE(sv) != SVt_NV |
233 | && SvTYPE(sv) != SVt_PV |
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234 | && SvTYPE(sv) != SVt_PVMG) /* mstore */ |
235 | && SvTYPE(sv) != SVt_PV) /* mstore */ |
235 | { |
236 | { |
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237 | int deref = !SvROK (sv); |
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238 | |
236 | if (!storable_mstore) |
239 | if (!storable_mstore) |
237 | need_storable (); |
240 | need_storable (); |
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241 | |
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242 | if (deref) |
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243 | sv = newRV_noinc (sv); |
238 | |
244 | |
239 | PUSHMARK (SP); |
245 | PUSHMARK (SP); |
240 | XPUSHs (sv); |
246 | XPUSHs (sv); |
241 | PUTBACK; |
247 | PUTBACK; |
242 | |
248 | |
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249 | |
255 | |
250 | if (SvPVX (sv)[0] != MAGIC_R) |
256 | if (SvPVX (sv)[0] != MAGIC_R) |
251 | croak ("Storable format changed, need newer version of Compress::LZF"); |
257 | croak ("Storable format changed, need newer version of Compress::LZF"); |
252 | |
258 | |
253 | if (ix) /* compress */ |
259 | if (ix) /* compress */ |
254 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_CR, 0))); |
260 | XPUSHs (sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, 0))); |
255 | else |
261 | else |
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262 | { |
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263 | if (deref) |
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264 | SvPVX (sv)[0] = MAGIC_R_deref; |
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265 | |
256 | XPUSHs (sv); |
266 | XPUSHs (sv); |
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267 | } |
257 | } |
268 | } |
258 | else if (sv && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
269 | else if (sv && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
259 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 1))); /* need to prefix only */ |
270 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 1))); /* need to prefix only */ |
260 | else if (ix == 2) /* compress always */ |
271 | else if (ix == 2) /* compress always */ |
261 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 0))); |
272 | XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 0))); |
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265 | void |
276 | void |
266 | sthaw(sv) |
277 | sthaw(sv) |
267 | SV * sv |
278 | SV * sv |
268 | PROTOTYPE: $ |
279 | PROTOTYPE: $ |
269 | PPCODE: |
280 | PPCODE: |
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281 | |
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282 | int deref = 0; |
270 | |
283 | |
271 | SvGETMAGIC (sv); |
284 | SvGETMAGIC (sv); |
272 | if (SvPOK (sv) && IN_RANGE (SvPV_nolen (sv)[0], MAGIC_LO, MAGIC_HI)) |
285 | if (SvPOK (sv) && IN_RANGE (SvPV_nolen (sv)[0], MAGIC_LO, MAGIC_HI)) |
273 | { |
286 | { |
274 | switch (SvPVX (sv)[0]) |
287 | switch (SvPVX (sv)[0]) |
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283 | |
296 | |
284 | case MAGIC_C: |
297 | case MAGIC_C: |
285 | XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
298 | XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
286 | break; |
299 | break; |
287 | |
300 | |
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301 | case MAGIC_CR_deref: |
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302 | deref = 1; |
288 | case MAGIC_CR: |
303 | case MAGIC_CR: |
289 | sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
304 | sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
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305 | case MAGIC_R_deref: |
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306 | if (SvPVX (sv)[0] == MAGIC_R_deref) |
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307 | { |
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308 | deref = 1; |
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309 | SvPVX (sv)[0] = MAGIC_R; |
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310 | } |
290 | case MAGIC_R: |
311 | case MAGIC_R: |
291 | if (!storable_mstore) |
312 | if (!storable_mstore) |
292 | need_storable (); |
313 | need_storable (); |
293 | |
314 | |
294 | PUSHMARK (SP); |
315 | PUSHMARK (SP); |
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298 | if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
319 | if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
299 | croak ("Storable::mstore didn't return a single scalar"); |
320 | croak ("Storable::mstore didn't return a single scalar"); |
300 | |
321 | |
301 | SPAGAIN; |
322 | SPAGAIN; |
302 | |
323 | |
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324 | if (deref) |
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325 | { |
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326 | SV *ref = SvREFCNT_inc (SvRV (TOPs)); |
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327 | |
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328 | SvREFCNT_dec (TOPs); /* destroy superfluous ref */ |
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329 | SETs (ref); |
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330 | |
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331 | if (SvPVX (sv)[0] == MAGIC_R) |
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332 | SvPVX (sv)[0] = MAGIC_R; |
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333 | } |
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334 | |
303 | /*XPUSHs (POPs); this is a nop, hopefully */ |
335 | XPUSHs (POPs); /* this is a nop, hopefully */ |
304 | |
336 | |
305 | break; |
337 | break; |
306 | |
338 | |
307 | default: |
339 | default: |
308 | croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
340 | croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |