1 |
root |
1.1 |
#include "EXTERN.h" |
2 |
|
|
#include "perl.h" |
3 |
|
|
#include "XSUB.h" |
4 |
|
|
|
5 |
|
|
/* try to be compatible with older perls */ |
6 |
|
|
/* SvPV_nolen() macro first defined in 5.005_55 */ |
7 |
|
|
/* this is slow, not threadsafe, but works */ |
8 |
|
|
#include "patchlevel.h" |
9 |
|
|
#if (PATCHLEVEL == 4) || ((PATCHLEVEL == 5) && (SUBVERSION < 55)) |
10 |
|
|
static STRLEN nolen_na; |
11 |
|
|
# define SvPV_nolen(sv) SvPV ((sv), nolen_na) |
12 |
|
|
#endif |
13 |
root |
1.2 |
#if PATCHLEVEL < 6 |
14 |
|
|
# define call_sv perl_call_sv |
15 |
|
|
#endif |
16 |
root |
1.1 |
|
17 |
|
|
#include "lzf_c.c" |
18 |
|
|
#include "lzf_d.c" |
19 |
|
|
|
20 |
|
|
/* we re-use the storable header for our purposes */ |
21 |
|
|
#define MAGIC_LO 0 |
22 |
|
|
#define MAGIC_U 0 /* uncompressed data follows */ |
23 |
|
|
#define MAGIC_C 1 /* compressed data follows */ |
24 |
root |
1.4 |
#define MAGIC_undef 2 /* the special value undef */ |
25 |
|
|
#define MAGIC_CR 3 /* storable (reference, freeze), compressed */ |
26 |
root |
1.1 |
#define MAGIC_R 4 /* storable (reference, freeze) */ |
27 |
root |
1.9 |
#define MAGIC_CR_deref 5 /* storable (NO reference, freeze), compressed */ |
28 |
root |
1.10 |
#define MAGIC_R_deref 6 /* storable (NO reference, freeze) */ |
29 |
root |
1.1 |
#define MAGIC_HI 7 /* room for one higher storable major */ |
30 |
|
|
|
31 |
|
|
#define IN_RANGE(v,l,h) ((unsigned int)((unsigned)(v) - (unsigned)(l)) <= (unsigned)(h) - (unsigned)(l)) |
32 |
|
|
|
33 |
|
|
static CV *storable_mstore, *storable_mretrieve; |
34 |
|
|
|
35 |
|
|
static SV * |
36 |
root |
1.10 |
compress_sv (SV *data, char cprepend, int uprepend) |
37 |
root |
1.1 |
{ |
38 |
|
|
STRLEN usize, csize; |
39 |
|
|
char *src = (char *)SvPV (data, usize); |
40 |
|
|
|
41 |
|
|
if (usize) |
42 |
|
|
{ |
43 |
|
|
SV *ret = NEWSV (0, usize + 1); |
44 |
|
|
unsigned char *dst; |
45 |
|
|
int skip = 0; |
46 |
|
|
|
47 |
|
|
SvPOK_only (ret); |
48 |
|
|
dst = (unsigned char *)SvPVX (ret); |
49 |
|
|
|
50 |
|
|
if (cprepend) |
51 |
|
|
dst[skip++] = cprepend; |
52 |
|
|
|
53 |
|
|
if (usize < 0x80) |
54 |
|
|
{ |
55 |
|
|
dst[skip++] = usize; |
56 |
|
|
} |
57 |
|
|
else if (usize < 0x800) |
58 |
|
|
{ |
59 |
|
|
dst[skip++] = (( usize >> 6) | 0xc0); |
60 |
|
|
dst[skip++] = (( usize & 0x3f) | 0x80); |
61 |
|
|
} |
62 |
|
|
else if (usize < 0x10000) |
63 |
|
|
{ |
64 |
|
|
dst[skip++] = (( usize >> 12) | 0xe0); |
65 |
|
|
dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
66 |
|
|
dst[skip++] = (( usize & 0x3f) | 0x80); |
67 |
|
|
} |
68 |
|
|
else if (usize < 0x200000) |
69 |
|
|
{ |
70 |
|
|
dst[skip++] = (( usize >> 18) | 0xf0); |
71 |
|
|
dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); |
72 |
|
|
dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
73 |
|
|
dst[skip++] = (( usize & 0x3f) | 0x80); |
74 |
|
|
} |
75 |
|
|
else if (usize < 0x4000000) |
76 |
|
|
{ |
77 |
|
|
dst[skip++] = (( usize >> 24) | 0xf8); |
78 |
|
|
dst[skip++] = (((usize >> 18) & 0x3f) | 0x80); |
79 |
|
|
dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); |
80 |
|
|
dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
81 |
|
|
dst[skip++] = (( usize & 0x3f) | 0x80); |
82 |
|
|
} |
83 |
|
|
else |
84 |
|
|
croak ("compress can only compress up to %ld bytes", 0x4000000-1); |
85 |
|
|
|
86 |
|
|
/* 11 bytes is the smallest compressible string */ |
87 |
|
|
csize = usize < 11 ? 0 : |
88 |
|
|
lzf_compress (src, usize, |
89 |
|
|
dst + skip, |
90 |
|
|
usize - skip); |
91 |
|
|
|
92 |
|
|
if (csize) |
93 |
|
|
{ |
94 |
|
|
SvCUR_set (ret, csize + skip); |
95 |
|
|
} |
96 |
root |
1.10 |
else if (uprepend < 0) |
97 |
root |
1.1 |
{ |
98 |
|
|
SvREFCNT_dec (ret); |
99 |
|
|
ret = SvREFCNT_inc (data); |
100 |
|
|
} |
101 |
|
|
else |
102 |
|
|
{ |
103 |
root |
1.10 |
*dst++ = uprepend; |
104 |
root |
1.1 |
|
105 |
|
|
Move ((void *)src, (void *)dst, usize, unsigned char); |
106 |
|
|
|
107 |
|
|
SvCUR_set (ret, usize + 1); |
108 |
|
|
} |
109 |
|
|
|
110 |
|
|
return ret; |
111 |
|
|
} |
112 |
|
|
else |
113 |
|
|
return newSVpv ("", 0); |
114 |
|
|
} |
115 |
|
|
|
116 |
|
|
static SV * |
117 |
|
|
decompress_sv (SV *data, int skip) |
118 |
|
|
{ |
119 |
|
|
STRLEN usize, csize; |
120 |
|
|
unsigned char *src = (unsigned char *)SvPV (data, csize) + skip; |
121 |
|
|
|
122 |
|
|
if (csize) |
123 |
|
|
{ |
124 |
|
|
void *dst; |
125 |
|
|
SV *ret; |
126 |
|
|
|
127 |
|
|
csize -= skip; |
128 |
|
|
|
129 |
|
|
if (src[0]) |
130 |
|
|
{ |
131 |
|
|
if (!(src[0] & 0x80)) |
132 |
|
|
{ |
133 |
|
|
csize -= 1; |
134 |
|
|
usize = *src++ & 0xff; |
135 |
|
|
} |
136 |
|
|
else if (!(src[0] & 0x20)) |
137 |
|
|
{ |
138 |
|
|
csize -= 2; |
139 |
|
|
usize = *src++ & 0x1f; |
140 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
141 |
|
|
} |
142 |
|
|
else if (!(src[0] & 0x10)) |
143 |
|
|
{ |
144 |
|
|
csize -= 3; |
145 |
|
|
usize = *src++ & 0x0f; |
146 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
147 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
148 |
|
|
} |
149 |
|
|
else if (!(src[0] & 0x08)) |
150 |
|
|
{ |
151 |
|
|
csize -= 4; |
152 |
|
|
usize = *src++ & 0x07; |
153 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
154 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
155 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
156 |
|
|
} |
157 |
|
|
else if (!(src[0] & 0x04)) |
158 |
|
|
{ |
159 |
|
|
csize -= 5; |
160 |
|
|
usize = *src++ & 0x03; |
161 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
162 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
163 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
164 |
|
|
usize = (usize << 6) | (*src++ & 0x3f); |
165 |
|
|
} |
166 |
|
|
else |
167 |
|
|
croak ("compressed data corrupted"); |
168 |
|
|
|
169 |
|
|
ret = NEWSV (0, usize); |
170 |
|
|
SvPOK_only (ret); |
171 |
|
|
dst = SvPVX (ret); |
172 |
|
|
|
173 |
|
|
if (lzf_decompress (src, csize, dst, usize) != usize) |
174 |
|
|
croak ("compressed data corrupted", csize, skip, usize); |
175 |
|
|
} |
176 |
|
|
else |
177 |
|
|
{ |
178 |
|
|
usize = csize - 1; |
179 |
|
|
ret = NEWSV (0, usize); |
180 |
|
|
SvPOK_only (ret); |
181 |
|
|
|
182 |
|
|
Move ((void *)(src + 1), (void *)SvPVX (ret), usize, unsigned char); |
183 |
|
|
} |
184 |
|
|
|
185 |
|
|
SvCUR_set (ret, usize); |
186 |
|
|
|
187 |
|
|
return ret; |
188 |
|
|
} |
189 |
|
|
else |
190 |
|
|
return newSVpvn ("", 0); |
191 |
|
|
} |
192 |
|
|
|
193 |
|
|
static void |
194 |
|
|
need_storable(void) |
195 |
|
|
{ |
196 |
root |
1.2 |
#if PATCHLEVEL < 6 |
197 |
|
|
perl_eval_pv ("require Storable;", 1); |
198 |
|
|
#else |
199 |
root |
1.1 |
load_module (PERL_LOADMOD_NOIMPORT, newSVpv ("Storable", 0), Nullsv); |
200 |
root |
1.2 |
#endif |
201 |
root |
1.1 |
|
202 |
|
|
storable_mstore = GvCV (gv_fetchpv ("Storable::mstore" , TRUE, SVt_PVCV)); |
203 |
|
|
storable_mretrieve = GvCV (gv_fetchpv ("Storable::mretrieve", TRUE, SVt_PVCV)); |
204 |
|
|
} |
205 |
|
|
|
206 |
|
|
MODULE = Compress::LZF PACKAGE = Compress::LZF |
207 |
|
|
|
208 |
|
|
void |
209 |
|
|
compress(data) |
210 |
|
|
SV * data |
211 |
|
|
PROTOTYPE: $ |
212 |
|
|
PPCODE: |
213 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U))); |
214 |
root |
1.1 |
|
215 |
|
|
void |
216 |
|
|
decompress(data) |
217 |
|
|
SV * data |
218 |
|
|
PROTOTYPE: $ |
219 |
|
|
PPCODE: |
220 |
|
|
XPUSHs (sv_2mortal (decompress_sv (data, 0))); |
221 |
|
|
|
222 |
|
|
void |
223 |
|
|
sfreeze(sv) |
224 |
|
|
SV * sv |
225 |
|
|
ALIAS: |
226 |
|
|
sfreeze_cr = 1 |
227 |
|
|
sfreeze_c = 2 |
228 |
|
|
PROTOTYPE: $ |
229 |
|
|
PPCODE: |
230 |
|
|
|
231 |
root |
1.10 |
SvGETMAGIC (sv); |
232 |
|
|
|
233 |
root |
1.4 |
if (!SvOK (sv)) |
234 |
|
|
XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
235 |
root |
1.12 |
else if (SvROK (sv) |
236 |
|
|
|| (SvTYPE(sv) != SVt_IV |
237 |
|
|
&& SvTYPE(sv) != SVt_NV |
238 |
|
|
&& SvTYPE(sv) != SVt_PV |
239 |
|
|
&& SvTYPE(sv) != SVt_PVMG)) /* mstore */ |
240 |
root |
1.1 |
{ |
241 |
root |
1.9 |
int deref = !SvROK (sv); |
242 |
|
|
|
243 |
root |
1.1 |
if (!storable_mstore) |
244 |
|
|
need_storable (); |
245 |
|
|
|
246 |
root |
1.9 |
if (deref) |
247 |
|
|
sv = newRV_noinc (sv); |
248 |
|
|
|
249 |
root |
1.1 |
PUSHMARK (SP); |
250 |
|
|
XPUSHs (sv); |
251 |
|
|
PUTBACK; |
252 |
|
|
|
253 |
|
|
if (1 != call_sv ((SV *)storable_mstore, G_SCALAR)) |
254 |
|
|
croak ("Storable::mstore didn't return a single scalar"); |
255 |
|
|
|
256 |
|
|
SPAGAIN; |
257 |
|
|
|
258 |
|
|
sv = POPs; |
259 |
|
|
|
260 |
|
|
if (SvPVX (sv)[0] != MAGIC_R) |
261 |
|
|
croak ("Storable format changed, need newer version of Compress::LZF"); |
262 |
|
|
|
263 |
root |
1.10 |
if (deref) |
264 |
|
|
SvPVX (sv)[0] = MAGIC_R_deref; |
265 |
|
|
|
266 |
root |
1.1 |
if (ix) /* compress */ |
267 |
root |
1.10 |
sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1)); |
268 |
root |
1.9 |
|
269 |
root |
1.10 |
XPUSHs (sv); |
270 |
root |
1.1 |
} |
271 |
root |
1.10 |
else if (SvTYPE (sv) == SVt_PV && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
272 |
|
|
XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U))); /* need to prefix only */ |
273 |
root |
1.1 |
else if (ix == 2) /* compress always */ |
274 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1))); |
275 |
root |
1.1 |
else /* don't compress */ |
276 |
|
|
XPUSHs (sv_2mortal (SvREFCNT_inc (sv))); |
277 |
|
|
|
278 |
|
|
void |
279 |
|
|
sthaw(sv) |
280 |
|
|
SV * sv |
281 |
|
|
PROTOTYPE: $ |
282 |
|
|
PPCODE: |
283 |
|
|
|
284 |
root |
1.9 |
int deref = 0; |
285 |
|
|
|
286 |
root |
1.7 |
SvGETMAGIC (sv); |
287 |
root |
1.6 |
if (SvPOK (sv) && IN_RANGE (SvPV_nolen (sv)[0], MAGIC_LO, MAGIC_HI)) |
288 |
root |
1.1 |
{ |
289 |
|
|
switch (SvPVX (sv)[0]) |
290 |
|
|
{ |
291 |
root |
1.4 |
case MAGIC_undef: |
292 |
|
|
XPUSHs (sv_2mortal (NEWSV (0, 0))); |
293 |
|
|
break; |
294 |
|
|
|
295 |
root |
1.1 |
case MAGIC_U: |
296 |
|
|
XPUSHs (sv_2mortal (decompress_sv (sv, 0))); |
297 |
|
|
break; |
298 |
|
|
|
299 |
|
|
case MAGIC_C: |
300 |
|
|
XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
301 |
|
|
break; |
302 |
|
|
|
303 |
root |
1.10 |
case MAGIC_R_deref: |
304 |
|
|
deref = 1; |
305 |
|
|
SvPVX (sv)[0] = MAGIC_R; |
306 |
|
|
goto handle_MAGIC_R; |
307 |
|
|
|
308 |
root |
1.9 |
case MAGIC_CR_deref: |
309 |
|
|
deref = 1; |
310 |
root |
1.1 |
case MAGIC_CR: |
311 |
|
|
sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
312 |
root |
1.10 |
if (deref) |
313 |
|
|
if (SvPVX (sv)[0] == MAGIC_R_deref) |
314 |
root |
1.9 |
SvPVX (sv)[0] = MAGIC_R; |
315 |
root |
1.10 |
else |
316 |
|
|
croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
317 |
|
|
|
318 |
root |
1.1 |
case MAGIC_R: |
319 |
root |
1.10 |
handle_MAGIC_R: |
320 |
root |
1.1 |
if (!storable_mstore) |
321 |
|
|
need_storable (); |
322 |
|
|
|
323 |
|
|
PUSHMARK (SP); |
324 |
|
|
XPUSHs (sv); |
325 |
|
|
PUTBACK; |
326 |
|
|
|
327 |
|
|
if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
328 |
|
|
croak ("Storable::mstore didn't return a single scalar"); |
329 |
|
|
|
330 |
|
|
SPAGAIN; |
331 |
|
|
|
332 |
root |
1.9 |
if (deref) |
333 |
|
|
{ |
334 |
root |
1.10 |
SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs)))); |
335 |
root |
1.9 |
|
336 |
|
|
if (SvPVX (sv)[0] == MAGIC_R) |
337 |
root |
1.10 |
SvPVX (sv)[0] = MAGIC_R_deref; |
338 |
root |
1.9 |
} |
339 |
root |
1.10 |
else |
340 |
|
|
XPUSHs (POPs); /* this is a nop, hopefully */ |
341 |
root |
1.1 |
|
342 |
|
|
break; |
343 |
|
|
|
344 |
|
|
default: |
345 |
|
|
croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
346 |
|
|
} |
347 |
|
|
} |
348 |
|
|
else |
349 |
root |
1.11 |
XPUSHs (sv_2mortal (newSVsv (sv))); |