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Comparing Compress-LZF/LZF.xs (file contents):
Revision 1.9 by root, Sun Mar 3 04:45:18 2002 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 */
24#define MAGIC_undef 2 /* the special value undef */ 18#define MAGIC_undef 2 /* the special value undef */
25#define MAGIC_CR 3 /* storable (reference, freeze), compressed */ 19#define MAGIC_CR 3 /* storable (reference, freeze), compressed */
26#define MAGIC_R 4 /* storable (reference, freeze) */ 20#define MAGIC_R 4 /* storable (reference, freeze) */
27#define MAGIC_CR_deref 5 /* storable (NO reference, freeze), compressed */ 21#define MAGIC_CR_deref 5 /* storable (NO reference, freeze), compressed */
28#define MAGIC_R_deref 6 /* storable NO (reference, freeze) */ 22#define MAGIC_R_deref 6 /* storable (NO reference, freeze) */
29#define MAGIC_HI 7 /* room for one higher storable major */ 23#define MAGIC_HI 7 /* room for one higher storable major */
24/* for historical reasons, MAGIC_undef + MAGIC_R and MAGIC_undef + MAGIC_R_deref are used, too */
30 25
31#define IN_RANGE(v,l,h) ((unsigned int)((unsigned)(v) - (unsigned)(l)) <= (unsigned)(h) - (unsigned)(l)) 26#define IN_RANGE(v,l,h) ((unsigned int)((unsigned)(v) - (unsigned)(l)) <= (unsigned)(h) - (unsigned)(l))
32 27
28static SV *serializer_package, *serializer_mstore, *serializer_mretrieve;
33static CV *storable_mstore, *storable_mretrieve; 29static CV *storable_mstore, *storable_mretrieve;
34 30
31#if Size_t_size > 4
32# define MAX_LENGTH ((Size_t)0x80000000L)
33#else
34# define MAX_LENGTH ((Size_t) 0x8000000L)
35#endif
36
35static SV * 37static SV *
36compress_sv (SV *data, char cprepend, char uprepend) 38compress_sv (SV *data, char cprepend, int uprepend, int best)
37{ 39{
40 void *state;
38 STRLEN usize, csize; 41 STRLEN usize, csize;
39 char *src = (char *)SvPV (data, usize); 42 char *src = (char *)SvPVbyte (data, usize);
40 43
41 if (usize) 44 if (usize)
42 { 45 {
43 SV *ret = NEWSV (0, usize + 1); 46 SV *ret = NEWSV (0, usize + 1);
44 unsigned char *dst; 47 unsigned char *dst;
… …
48 dst = (unsigned char *)SvPVX (ret); 51 dst = (unsigned char *)SvPVX (ret);
49 52
50 if (cprepend) 53 if (cprepend)
51 dst[skip++] = cprepend; 54 dst[skip++] = cprepend;
52 55
53 if (usize < 0x80) 56 if (usize <= 0x7f)
54 { 57 {
55 dst[skip++] = usize; 58 dst[skip++] = usize;
56 } 59 }
57 else if (usize < 0x800) 60 else if (usize <= 0x7ff)
58 { 61 {
59 dst[skip++] = (( usize >> 6) | 0xc0); 62 dst[skip++] = (( usize >> 6) | 0xc0);
60 dst[skip++] = (( usize & 0x3f) | 0x80); 63 dst[skip++] = (( usize & 0x3f) | 0x80);
61 } 64 }
62 else if (usize < 0x10000) 65 else if (usize <= 0xffff)
63 { 66 {
64 dst[skip++] = (( usize >> 12) | 0xe0); 67 dst[skip++] = (( usize >> 12) | 0xe0);
65 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); 68 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80);
66 dst[skip++] = (( usize & 0x3f) | 0x80); 69 dst[skip++] = (( usize & 0x3f) | 0x80);
67 } 70 }
68 else if (usize < 0x200000) 71 else if (usize <= 0x1fffff)
69 { 72 {
70 dst[skip++] = (( usize >> 18) | 0xf0); 73 dst[skip++] = (( usize >> 18) | 0xf0);
71 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); 74 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80);
72 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); 75 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80);
73 dst[skip++] = (( usize & 0x3f) | 0x80); 76 dst[skip++] = (( usize & 0x3f) | 0x80);
74 } 77 }
75 else if (usize < 0x4000000) 78 else if (usize <= 0x3ffffff)
76 { 79 {
77 dst[skip++] = (( usize >> 24) | 0xf8); 80 dst[skip++] = (( usize >> 24) | 0xf8);
78 dst[skip++] = (((usize >> 18) & 0x3f) | 0x80); 81 dst[skip++] = (((usize >> 18) & 0x3f) | 0x80);
79 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); 82 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80);
80 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); 83 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80);
81 dst[skip++] = (( usize & 0x3f) | 0x80); 84 dst[skip++] = (( usize & 0x3f) | 0x80);
82 } 85 }
86 else if (usize <= 0x7fffffff)
87 {
88 dst[skip++] = (( usize >> 30) | 0xfc);
89 dst[skip++] = (((usize >> 24) & 0x3f) | 0x80);
90 dst[skip++] = (((usize >> 18) & 0x3f) | 0x80);
91 dst[skip++] = (((usize >> 12) & 0x3f) | 0x80);
92 dst[skip++] = (((usize >> 6) & 0x3f) | 0x80);
93 dst[skip++] = (( usize & 0x3f) | 0x80);
94 }
83 else 95 else
84 croak ("compress can only compress up to %ld bytes", 0x4000000-1); 96 croak ("compress can only compress up to %ld bytes", 0x7fffffffL);
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 }
85 106
86 /* 11 bytes is the smallest compressible string */ 107 /* 11 bytes is the smallest compressible string */
87 csize = usize < 11 ? 0 : 108 csize = usize < 11 ? 0 :
88 lzf_compress (src, usize, 109 (best ? lzf_compress_best (src, usize, dst + skip, usize - skip, *(LZF_STATE_BEST *)state)
89 dst + skip, 110 : lzf_compress (src, usize, dst + skip, usize - skip, *(LZF_STATE *)state));
90 usize - skip); 111
112 free (state);
113
114 if (usize > 2000) perlinterp_acquire ();
91 115
92 if (csize) 116 if (csize)
93 { 117 {
94 SvCUR_set (ret, csize + skip); 118 SvCUR_set (ret, csize + skip);
95 } 119 }
96 else if (!uprepend) 120 else if (uprepend < 0)
97 { 121 {
98 SvREFCNT_dec (ret); 122 SvREFCNT_dec (ret);
99 ret = SvREFCNT_inc (data); 123 ret = SvREFCNT_inc (data);
100 } 124 }
101 else 125 else
102 { 126 {
103 *dst++ = 0; 127 *dst++ = uprepend;
104 128
105 Move ((void *)src, (void *)dst, usize, unsigned char); 129 Move ((void *)src, (void *)dst, usize, unsigned char);
106 130
107 SvCUR_set (ret, usize + 1); 131 SvCUR_set (ret, usize + 1);
108 } 132 }
… …
115 139
116static SV * 140static SV *
117decompress_sv (SV *data, int skip) 141decompress_sv (SV *data, int skip)
118{ 142{
119 STRLEN usize, csize; 143 STRLEN usize, csize;
120 unsigned char *src = (unsigned char *)SvPV (data, csize) + skip; 144 unsigned char *src = (unsigned char *)SvPVbyte (data, csize) + skip;
121 145
122 if (csize) 146 if (csize)
123 { 147 {
124 void *dst; 148 void *dst;
125 SV *ret; 149 SV *ret;
150 int res;
126 151
127 csize -= skip; 152 csize -= skip;
128 153
129 if (src[0]) 154 if (src[0])
130 { 155 {
131 if (!(src[0] & 0x80)) 156 if (!(src[0] & 0x80) && csize >= 1)
132 { 157 {
133 csize -= 1; 158 csize -= 1;
134 usize = *src++ & 0xff; 159 usize = *src++ & 0xff;
135 } 160 }
136 else if (!(src[0] & 0x20)) 161 else if (!(src[0] & 0x20) && csize >= 2)
137 { 162 {
138 csize -= 2; 163 csize -= 2;
139 usize = *src++ & 0x1f; 164 usize = *src++ & 0x1f;
140 usize = (usize << 6) | (*src++ & 0x3f); 165 usize = (usize << 6) | (*src++ & 0x3f);
141 } 166 }
142 else if (!(src[0] & 0x10)) 167 else if (!(src[0] & 0x10) && csize >= 3)
143 { 168 {
144 csize -= 3; 169 csize -= 3;
145 usize = *src++ & 0x0f; 170 usize = *src++ & 0x0f;
146 usize = (usize << 6) | (*src++ & 0x3f); 171 usize = (usize << 6) | (*src++ & 0x3f);
147 usize = (usize << 6) | (*src++ & 0x3f); 172 usize = (usize << 6) | (*src++ & 0x3f);
148 } 173 }
149 else if (!(src[0] & 0x08)) 174 else if (!(src[0] & 0x08) && csize >= 4)
150 { 175 {
151 csize -= 4; 176 csize -= 4;
152 usize = *src++ & 0x07; 177 usize = *src++ & 0x07;
153 usize = (usize << 6) | (*src++ & 0x3f); 178 usize = (usize << 6) | (*src++ & 0x3f);
154 usize = (usize << 6) | (*src++ & 0x3f); 179 usize = (usize << 6) | (*src++ & 0x3f);
155 usize = (usize << 6) | (*src++ & 0x3f); 180 usize = (usize << 6) | (*src++ & 0x3f);
156 } 181 }
157 else if (!(src[0] & 0x04)) 182 else if (!(src[0] & 0x04) && csize >= 5)
158 { 183 {
159 csize -= 5; 184 csize -= 5;
160 usize = *src++ & 0x03; 185 usize = *src++ & 0x03;
161 usize = (usize << 6) | (*src++ & 0x3f); 186 usize = (usize << 6) | (*src++ & 0x3f);
162 usize = (usize << 6) | (*src++ & 0x3f); 187 usize = (usize << 6) | (*src++ & 0x3f);
163 usize = (usize << 6) | (*src++ & 0x3f); 188 usize = (usize << 6) | (*src++ & 0x3f);
164 usize = (usize << 6) | (*src++ & 0x3f); 189 usize = (usize << 6) | (*src++ & 0x3f);
165 } 190 }
191 else if (!(src[0] & 0x02) && csize >= 6)
192 {
193 csize -= 6;
194 usize = *src++ & 0x01;
195 usize = (usize << 6) | (*src++ & 0x3f);
196 usize = (usize << 6) | (*src++ & 0x3f);
197 usize = (usize << 6) | (*src++ & 0x3f);
198 usize = (usize << 6) | (*src++ & 0x3f);
199 usize = (usize << 6) | (*src++ & 0x3f);
200 }
166 else 201 else
167 croak ("compressed data corrupted"); 202 croak ("compressed data corrupted (invalid length)");
168 203
204 if (!usize)
205 croak ("compressed data corrupted (invalid length)");
206
169 ret = NEWSV (0, usize); 207 ret = NEWSV (0, usize);
170 SvPOK_only (ret); 208 SvPOK_only (ret);
171 dst = SvPVX (ret); 209 dst = SvPVX (ret);
172 210
211 if (usize > 4000) perlinterp_release ();
173 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)
216 {
217 SvREFCNT_dec (ret);
174 croak ("compressed data corrupted", csize, skip, usize); 218 croak ("compressed data corrupted (size mismatch)", csize, skip, usize);
219 }
175 } 220 }
176 else 221 else
177 { 222 {
178 usize = csize - 1; 223 usize = csize - 1;
179 ret = NEWSV (0, usize); 224 ret = NEWSV (0, usize | 1);
180 SvPOK_only (ret); 225 SvPOK_only (ret);
181 226
182 Move ((void *)(src + 1), (void *)SvPVX (ret), usize, unsigned char); 227 Move ((void *)(src + 1), (void *)SvPVX (ret), usize, unsigned char);
183 } 228 }
184 229
… …
189 else 234 else
190 return newSVpvn ("", 0); 235 return newSVpvn ("", 0);
191} 236}
192 237
193static void 238static void
194need_storable(void) 239need_storable (void)
195{ 240{
196#if PATCHLEVEL < 6 241 eval_sv (sv_2mortal (newSVpvf ("require %s", SvPVbyte_nolen (serializer_package))), G_VOID | G_DISCARD);
197 perl_eval_pv ("require Storable;", 1);
198#else
199 load_module (PERL_LOADMOD_NOIMPORT, newSVpv ("Storable", 0), Nullsv);
200#endif
201 242
202 storable_mstore = GvCV (gv_fetchpv ("Storable::mstore" , TRUE, SVt_PVCV)); 243 storable_mstore = (CV *)SvREFCNT_inc (GvCV (gv_fetchpv (SvPVbyte_nolen (serializer_mstore ), TRUE, SVt_PVCV)));
203 storable_mretrieve = GvCV (gv_fetchpv ("Storable::mretrieve", TRUE, SVt_PVCV)); 244 storable_mretrieve = (CV *)SvREFCNT_inc (GvCV (gv_fetchpv (SvPVbyte_nolen (serializer_mretrieve), TRUE, SVt_PVCV)));
204} 245}
205 246
206MODULE = Compress::LZF PACKAGE = Compress::LZF 247MODULE = Compress::LZF PACKAGE = Compress::LZF
248
249BOOT:
250 serializer_package = newSVpv ("Storable", 0);
251 serializer_mstore = newSVpv ("Storable::net_mstore", 0);
252 serializer_mretrieve = newSVpv ("Storable::mretrieve", 0);
253
254void
255set_serializer(package, mstore, mretrieve)
256 SV * package
257 SV * mstore
258 SV * mretrieve
259 PROTOTYPE: $$$
260 PPCODE:
261 SvSetSV (serializer_package , package );
262 SvSetSV (serializer_mstore , mstore );
263 SvSetSV (serializer_mretrieve, mretrieve);
264 SvREFCNT_dec (storable_mstore ); storable_mstore = 0;
265 SvREFCNT_dec (storable_mretrieve); storable_mretrieve = 0;
207 266
208void 267void
209compress(data) 268compress(data)
210 SV * data 269 SV * data
270 ALIAS:
271 compress_best = 1
211 PROTOTYPE: $ 272 PROTOTYPE: $
212 PPCODE: 273 PPCODE:
213 XPUSHs (sv_2mortal (compress_sv (data, 0, 1))); 274 XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U, ix)));
214 275
215void 276void
216decompress(data) 277decompress(data)
217 SV * data 278 SV * data
218 PROTOTYPE: $ 279 PROTOTYPE: $
… …
221 282
222void 283void
223sfreeze(sv) 284sfreeze(sv)
224 SV * sv 285 SV * sv
225 ALIAS: 286 ALIAS:
287 sfreeze = 0
226 sfreeze_cr = 1 288 sfreeze_cr = 1
227 sfreeze_c = 2 289 sfreeze_c = 2
290 sfreeze_best = 4
291 sfreeze_cr_best = 5
292 sfreeze_c_best = 6
228 PROTOTYPE: $ 293 PROTOTYPE: $
229 PPCODE: 294 PPCODE:
295{
296 int best = ix & 4;
297 ix &= 3;
298
299 SvGETMAGIC (sv);
230 300
231 if (!SvOK (sv)) 301 if (!SvOK (sv))
232 XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ 302 XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */
303 else if (SvROK (sv)
304 || SvUTF8 (sv)
233 else if (SvTYPE(sv) != SVt_IV 305 || (SvTYPE(sv) != SVt_IV
234 && SvTYPE(sv) != SVt_NV 306 && SvTYPE(sv) != SVt_NV
307 && SvTYPE(sv) != SVt_PV
308 && SvTYPE(sv) != SVt_PVIV
309 && SvTYPE(sv) != SVt_PVNV
235 && SvTYPE(sv) != SVt_PV) /* mstore */ 310 && SvTYPE(sv) != SVt_PVMG)) /* mstore */
236 { 311 {
237 int deref = !SvROK (sv); 312 int deref = !SvROK (sv);
313 char *pv;
238 314
239 if (!storable_mstore) 315 if (!storable_mstore)
316 {
317 PUTBACK;
240 need_storable (); 318 need_storable ();
319 SPAGAIN;
320 }
241 321
242 if (deref) 322 if (deref)
243 sv = newRV_noinc (sv); 323 sv = newRV_noinc (sv);
244 324
245 PUSHMARK (SP); 325 PUSHMARK (SP);
246 XPUSHs (sv); 326 XPUSHs (sv);
247 PUTBACK; 327 PUTBACK;
248 328
249 if (1 != call_sv ((SV *)storable_mstore, G_SCALAR)) 329 if (1 != call_sv ((SV *)storable_mstore, G_SCALAR))
250 croak ("Storable::mstore didn't return a single scalar"); 330 croak ("%s didn't return a single scalar", SvPVbyte_nolen (serializer_mstore));
251 331
252 SPAGAIN; 332 SPAGAIN;
253 333
254 sv = POPs; 334 sv = POPs;
335 pv = SvPV_nolen (sv);
255 336
256 if (SvPVX (sv)[0] != MAGIC_R) 337 if (*pv == MAGIC_R)
257 croak ("Storable format changed, need newer version of Compress::LZF"); 338 {
258 339 if (deref)
259 if (ix) /* compress */ 340 *pv = MAGIC_R_deref;
260 XPUSHs (sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, 0))); 341 }
261 else 342 else
262 { 343 {
263 if (deref) 344 char pfx[2];
345
264 SvPVX (sv)[0] = MAGIC_R_deref; 346 pfx[0] = MAGIC_undef;
347 pfx[1] = deref ? MAGIC_R_deref : MAGIC_R;
265 348
266 XPUSHs (sv); 349 sv_insert (sv, 0, 0, pfx, 2);
267 } 350 }
351
352 if (ix) /* compress */
353 sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1, best));
354
355 XPUSHs (sv);
268 } 356 }
269 else if (sv && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) 357 else if (SvPOKp (sv) && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI))
270 XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 1))); /* need to prefix only */ 358 XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U, best))); /* need to prefix only */
271 else if (ix == 2) /* compress always */ 359 else if (ix == 2) /* compress always */
272 XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, 0))); 360 XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1, best)));
361 else if (SvNIOK (sv)) /* don't compress */
362 {
363 STRLEN len;
364 char *s = SvPV (sv, len);
365 XPUSHs (sv_2mortal (newSVpvn (s, len)));
366 }
273 else /* don't compress */ 367 else /* don't compress */
274 XPUSHs (sv_2mortal (SvREFCNT_inc (sv))); 368 XPUSHs (sv_2mortal (newSVsv (sv)));
369}
275 370
276void 371void
277sthaw(sv) 372sthaw(sv)
278 SV * sv 373 SV * sv
279 PROTOTYPE: $ 374 PROTOTYPE: $
280 PPCODE: 375 PPCODE:
281 376{
377 STRLEN svlen;
282 int deref = 0; 378 int deref = 0;
283 379
284 SvGETMAGIC (sv); 380 SvGETMAGIC (sv);
285 if (SvPOK (sv) && IN_RANGE (SvPV_nolen (sv)[0], MAGIC_LO, MAGIC_HI)) 381 if (SvPOK (sv) && IN_RANGE (SvPVbyte (sv, svlen)[0], MAGIC_LO, MAGIC_HI))
286 { 382 {
383 redo:
384
287 switch (SvPVX (sv)[0]) 385 switch (SvPVX (sv)[0])
288 { 386 {
289 case MAGIC_undef: 387 case MAGIC_undef:
388 if (svlen <= 1)
290 XPUSHs (sv_2mortal (NEWSV (0, 0))); 389 XPUSHs (sv_2mortal (NEWSV (0, 0)));
390 else
391 {
392 if (SvPVX (sv)[1] == MAGIC_R_deref)
393 deref = 1;
394 else if (SvPVX (sv)[1] != MAGIC_R)
395 croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?");
396
397 sv_chop (sv, SvPVX (sv) + 2);
398
399 if (!storable_mstore)
400 {
401 PUTBACK;
402 need_storable ();
403 SPAGAIN;
404 }
405
406 PUSHMARK (SP);
407 XPUSHs (sv);
408 PUTBACK;
409
410 if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR))
411 croak ("%s didn't return a single scalar", SvPVbyte_nolen (serializer_mretrieve));
412
413 SPAGAIN;
414
415 if (deref)
416 SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs))));
417 else
418 SETs (sv_2mortal (newSVsv (TOPs)));
419 }
291 break; 420 break;
292 421
293 case MAGIC_U: 422 case MAGIC_U:
294 XPUSHs (sv_2mortal (decompress_sv (sv, 0))); 423 XPUSHs (sv_2mortal (decompress_sv (sv, 0)));
295 break; 424 break;
296 425
297 case MAGIC_C: 426 case MAGIC_C:
298 XPUSHs (sv_2mortal (decompress_sv (sv, 1))); 427 XPUSHs (sv_2mortal (decompress_sv (sv, 1)));
299 break; 428 break;
429
430 case MAGIC_R_deref:
431 deref = 1;
432 SvPVX (sv)[0] = MAGIC_R;
433 goto handle_MAGIC_R;
300 434
301 case MAGIC_CR_deref: 435 case MAGIC_CR_deref:
302 deref = 1; 436 deref = 1;
303 case MAGIC_CR: 437 case MAGIC_CR:
304 sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ 438 sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */
305 case MAGIC_R_deref: 439 if (deref)
306 if (SvPVX (sv)[0] == MAGIC_R_deref) 440 if (SvPVX (sv)[0] == MAGIC_R_deref)
441 SvPVX (sv)[0] = MAGIC_R;
442
443 goto redo;
444
445 case MAGIC_R:
446 handle_MAGIC_R:
447 if (!storable_mstore)
307 { 448 {
308 deref = 1; 449 PUTBACK;
309 SvPVX (sv)[0] = MAGIC_R; 450 need_storable ();
451 SPAGAIN;
310 } 452 }
311 case MAGIC_R:
312 if (!storable_mstore)
313 need_storable ();
314 453
315 PUSHMARK (SP); 454 PUSHMARK (SP);
316 XPUSHs (sv); 455 XPUSHs (sv);
317 PUTBACK; 456 PUTBACK;
318 457
319 if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) 458 if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR))
320 croak ("Storable::mstore didn't return a single scalar"); 459 croak ("%s didn't return a single scalar", SvPVbyte_nolen (serializer_mretrieve));
321 460
322 SPAGAIN; 461 SPAGAIN;
323 462
324 if (deref) 463 if (deref)
325 { 464 {
326 SV *ref = SvREFCNT_inc (SvRV (TOPs)); 465 SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs))));
327
328 SvREFCNT_dec (TOPs); /* destroy superfluous ref */
329 SETs (ref);
330 466
331 if (SvPVX (sv)[0] == MAGIC_R) 467 if (SvPVX (sv)[0] == MAGIC_R)
332 SvPVX (sv)[0] = MAGIC_R; 468 SvPVX (sv)[0] = MAGIC_R_deref;
333 } 469 }
470 else
471 SETs (sv_2mortal (newSVsv (TOPs)));
334 472
335 XPUSHs (POPs); /* this is a nop, hopefully */
336
337 break; 473 break;
338 474
339 default: 475 default:
340 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?");
341 } 477 }
342 } 478 }
343 else 479 else
344 XPUSHs (sv_2mortal (SvREFCNT_inc (sv))); 480 XPUSHs (sv_2mortal (newSVsv (sv)));
481}
482

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