1 |
root |
1.1 |
#include "EXTERN.h" |
2 |
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#include "perl.h" |
3 |
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#include "XSUB.h" |
4 |
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5 |
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/* try to be compatible with older perls */ |
6 |
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/* SvPV_nolen() macro first defined in 5.005_55 */ |
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/* this is slow, not threadsafe, but works */ |
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#include "patchlevel.h" |
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#if (PATCHLEVEL == 4) || ((PATCHLEVEL == 5) && (SUBVERSION < 55)) |
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static STRLEN nolen_na; |
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# define SvPV_nolen(sv) SvPV ((sv), nolen_na) |
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#endif |
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root |
1.2 |
#if PATCHLEVEL < 6 |
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# define call_sv perl_call_sv |
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#endif |
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root |
1.1 |
|
17 |
pcg |
1.18 |
#define HLOG 15 |
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#define ULTRA_FAST 0 |
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20 |
root |
1.1 |
#include "lzf_c.c" |
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#include "lzf_d.c" |
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/* we re-use the storable header for our purposes */ |
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#define MAGIC_LO 0 |
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#define MAGIC_U 0 /* uncompressed data follows */ |
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#define MAGIC_C 1 /* compressed data follows */ |
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root |
1.4 |
#define MAGIC_undef 2 /* the special value undef */ |
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#define MAGIC_CR 3 /* storable (reference, freeze), compressed */ |
29 |
root |
1.1 |
#define MAGIC_R 4 /* storable (reference, freeze) */ |
30 |
root |
1.9 |
#define MAGIC_CR_deref 5 /* storable (NO reference, freeze), compressed */ |
31 |
root |
1.10 |
#define MAGIC_R_deref 6 /* storable (NO reference, freeze) */ |
32 |
root |
1.1 |
#define MAGIC_HI 7 /* room for one higher storable major */ |
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34 |
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#define IN_RANGE(v,l,h) ((unsigned int)((unsigned)(v) - (unsigned)(l)) <= (unsigned)(h) - (unsigned)(l)) |
35 |
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36 |
root |
1.14 |
static SV *serializer_package, *serializer_mstore, *serializer_mretrieve; |
37 |
root |
1.1 |
static CV *storable_mstore, *storable_mretrieve; |
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39 |
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static SV * |
40 |
root |
1.10 |
compress_sv (SV *data, char cprepend, int uprepend) |
41 |
root |
1.1 |
{ |
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STRLEN usize, csize; |
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char *src = (char *)SvPV (data, usize); |
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45 |
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if (usize) |
46 |
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{ |
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SV *ret = NEWSV (0, usize + 1); |
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unsigned char *dst; |
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int skip = 0; |
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51 |
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SvPOK_only (ret); |
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dst = (unsigned char *)SvPVX (ret); |
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54 |
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if (cprepend) |
55 |
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dst[skip++] = cprepend; |
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57 |
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if (usize < 0x80) |
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{ |
59 |
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dst[skip++] = usize; |
60 |
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} |
61 |
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else if (usize < 0x800) |
62 |
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{ |
63 |
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dst[skip++] = (( usize >> 6) | 0xc0); |
64 |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
65 |
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} |
66 |
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else if (usize < 0x10000) |
67 |
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{ |
68 |
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dst[skip++] = (( usize >> 12) | 0xe0); |
69 |
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dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
70 |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
71 |
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} |
72 |
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else if (usize < 0x200000) |
73 |
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{ |
74 |
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dst[skip++] = (( usize >> 18) | 0xf0); |
75 |
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dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); |
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dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
78 |
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} |
79 |
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else if (usize < 0x4000000) |
80 |
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{ |
81 |
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dst[skip++] = (( usize >> 24) | 0xf8); |
82 |
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dst[skip++] = (((usize >> 18) & 0x3f) | 0x80); |
83 |
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dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); |
84 |
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dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
85 |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
86 |
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} |
87 |
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else |
88 |
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croak ("compress can only compress up to %ld bytes", 0x4000000-1); |
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90 |
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/* 11 bytes is the smallest compressible string */ |
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csize = usize < 11 ? 0 : |
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lzf_compress (src, usize, |
93 |
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dst + skip, |
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usize - skip); |
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96 |
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if (csize) |
97 |
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{ |
98 |
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SvCUR_set (ret, csize + skip); |
99 |
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} |
100 |
root |
1.10 |
else if (uprepend < 0) |
101 |
root |
1.1 |
{ |
102 |
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SvREFCNT_dec (ret); |
103 |
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ret = SvREFCNT_inc (data); |
104 |
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} |
105 |
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else |
106 |
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{ |
107 |
root |
1.10 |
*dst++ = uprepend; |
108 |
root |
1.1 |
|
109 |
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Move ((void *)src, (void *)dst, usize, unsigned char); |
110 |
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111 |
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SvCUR_set (ret, usize + 1); |
112 |
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} |
113 |
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114 |
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return ret; |
115 |
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} |
116 |
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else |
117 |
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return newSVpv ("", 0); |
118 |
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} |
119 |
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120 |
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static SV * |
121 |
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decompress_sv (SV *data, int skip) |
122 |
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{ |
123 |
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STRLEN usize, csize; |
124 |
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unsigned char *src = (unsigned char *)SvPV (data, csize) + skip; |
125 |
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126 |
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if (csize) |
127 |
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{ |
128 |
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void *dst; |
129 |
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SV *ret; |
130 |
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131 |
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csize -= skip; |
132 |
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133 |
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if (src[0]) |
134 |
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{ |
135 |
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if (!(src[0] & 0x80)) |
136 |
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{ |
137 |
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csize -= 1; |
138 |
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usize = *src++ & 0xff; |
139 |
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} |
140 |
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else if (!(src[0] & 0x20)) |
141 |
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{ |
142 |
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csize -= 2; |
143 |
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usize = *src++ & 0x1f; |
144 |
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usize = (usize << 6) | (*src++ & 0x3f); |
145 |
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} |
146 |
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else if (!(src[0] & 0x10)) |
147 |
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{ |
148 |
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csize -= 3; |
149 |
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usize = *src++ & 0x0f; |
150 |
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usize = (usize << 6) | (*src++ & 0x3f); |
151 |
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usize = (usize << 6) | (*src++ & 0x3f); |
152 |
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} |
153 |
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else if (!(src[0] & 0x08)) |
154 |
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{ |
155 |
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csize -= 4; |
156 |
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usize = *src++ & 0x07; |
157 |
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usize = (usize << 6) | (*src++ & 0x3f); |
158 |
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usize = (usize << 6) | (*src++ & 0x3f); |
159 |
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usize = (usize << 6) | (*src++ & 0x3f); |
160 |
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} |
161 |
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else if (!(src[0] & 0x04)) |
162 |
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{ |
163 |
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csize -= 5; |
164 |
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usize = *src++ & 0x03; |
165 |
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usize = (usize << 6) | (*src++ & 0x3f); |
166 |
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usize = (usize << 6) | (*src++ & 0x3f); |
167 |
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usize = (usize << 6) | (*src++ & 0x3f); |
168 |
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usize = (usize << 6) | (*src++ & 0x3f); |
169 |
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} |
170 |
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else |
171 |
root |
1.13 |
croak ("compressed data corrupted (invalid length)"); |
172 |
root |
1.1 |
|
173 |
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ret = NEWSV (0, usize); |
174 |
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SvPOK_only (ret); |
175 |
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dst = SvPVX (ret); |
176 |
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177 |
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if (lzf_decompress (src, csize, dst, usize) != usize) |
178 |
root |
1.13 |
croak ("compressed data corrupted (size mismatch)", csize, skip, usize); |
179 |
root |
1.1 |
} |
180 |
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else |
181 |
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{ |
182 |
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usize = csize - 1; |
183 |
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ret = NEWSV (0, usize); |
184 |
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SvPOK_only (ret); |
185 |
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186 |
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Move ((void *)(src + 1), (void *)SvPVX (ret), usize, unsigned char); |
187 |
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} |
188 |
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189 |
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SvCUR_set (ret, usize); |
190 |
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191 |
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return ret; |
192 |
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} |
193 |
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else |
194 |
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return newSVpvn ("", 0); |
195 |
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} |
196 |
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197 |
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static void |
198 |
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need_storable(void) |
199 |
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{ |
200 |
root |
1.2 |
#if PATCHLEVEL < 6 |
201 |
root |
1.14 |
char req[8192]; |
202 |
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sprintf (req, "require %s;", SvPV_nolen (serializer_package)); |
203 |
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perl_eval_pv (req, 1); |
204 |
root |
1.2 |
#else |
205 |
root |
1.14 |
load_module (PERL_LOADMOD_NOIMPORT, serializer_package, Nullsv); |
206 |
root |
1.2 |
#endif |
207 |
root |
1.1 |
|
208 |
root |
1.14 |
storable_mstore = GvCV (gv_fetchpv (SvPV_nolen (serializer_mstore ), TRUE, SVt_PVCV)); |
209 |
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storable_mretrieve = GvCV (gv_fetchpv (SvPV_nolen (serializer_mretrieve), TRUE, SVt_PVCV)); |
210 |
root |
1.1 |
} |
211 |
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212 |
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MODULE = Compress::LZF PACKAGE = Compress::LZF |
213 |
root |
1.14 |
|
214 |
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BOOT: |
215 |
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serializer_package = newSVpv ("Storable", 0); |
216 |
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serializer_mstore = newSVpv ("Storable::mstore", 0); |
217 |
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serializer_mretrieve = newSVpv ("Storable::mretrieve", 0); |
218 |
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219 |
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void |
220 |
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set_serializer(package, mstore, mretrieve) |
221 |
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SV * package |
222 |
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SV * mstore |
223 |
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SV * mretrieve |
224 |
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PROTOTYPE: $$$ |
225 |
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PPCODE: |
226 |
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SvSetSV (serializer_package , package ); |
227 |
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SvSetSV (serializer_mstore , mstore ); |
228 |
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SvSetSV (serializer_mretrieve, mretrieve); |
229 |
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storable_mstore = |
230 |
|
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storable_mretrieve = 0; |
231 |
root |
1.1 |
|
232 |
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void |
233 |
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compress(data) |
234 |
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SV * data |
235 |
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PROTOTYPE: $ |
236 |
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PPCODE: |
237 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U))); |
238 |
root |
1.1 |
|
239 |
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void |
240 |
|
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decompress(data) |
241 |
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SV * data |
242 |
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PROTOTYPE: $ |
243 |
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PPCODE: |
244 |
|
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XPUSHs (sv_2mortal (decompress_sv (data, 0))); |
245 |
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|
246 |
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void |
247 |
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sfreeze(sv) |
248 |
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SV * sv |
249 |
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ALIAS: |
250 |
|
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sfreeze_cr = 1 |
251 |
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sfreeze_c = 2 |
252 |
|
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PROTOTYPE: $ |
253 |
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PPCODE: |
254 |
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|
255 |
root |
1.10 |
SvGETMAGIC (sv); |
256 |
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|
257 |
root |
1.4 |
if (!SvOK (sv)) |
258 |
|
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XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
259 |
root |
1.12 |
else if (SvROK (sv) |
260 |
|
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|| (SvTYPE(sv) != SVt_IV |
261 |
|
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&& SvTYPE(sv) != SVt_NV |
262 |
|
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&& SvTYPE(sv) != SVt_PV |
263 |
root |
1.15 |
&& SvTYPE(sv) != SVt_PVIV |
264 |
|
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&& SvTYPE(sv) != SVt_PVNV |
265 |
root |
1.12 |
&& SvTYPE(sv) != SVt_PVMG)) /* mstore */ |
266 |
root |
1.1 |
{ |
267 |
root |
1.9 |
int deref = !SvROK (sv); |
268 |
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|
269 |
root |
1.1 |
if (!storable_mstore) |
270 |
|
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need_storable (); |
271 |
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|
272 |
root |
1.9 |
if (deref) |
273 |
|
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sv = newRV_noinc (sv); |
274 |
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|
275 |
root |
1.1 |
PUSHMARK (SP); |
276 |
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XPUSHs (sv); |
277 |
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PUTBACK; |
278 |
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|
279 |
|
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if (1 != call_sv ((SV *)storable_mstore, G_SCALAR)) |
280 |
|
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croak ("Storable::mstore didn't return a single scalar"); |
281 |
|
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282 |
|
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SPAGAIN; |
283 |
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284 |
|
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sv = POPs; |
285 |
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|
286 |
|
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if (SvPVX (sv)[0] != MAGIC_R) |
287 |
|
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croak ("Storable format changed, need newer version of Compress::LZF"); |
288 |
|
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|
289 |
root |
1.10 |
if (deref) |
290 |
|
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SvPVX (sv)[0] = MAGIC_R_deref; |
291 |
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|
292 |
root |
1.1 |
if (ix) /* compress */ |
293 |
root |
1.10 |
sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1)); |
294 |
root |
1.9 |
|
295 |
root |
1.10 |
XPUSHs (sv); |
296 |
root |
1.1 |
} |
297 |
root |
1.13 |
else if (SvPOKp (sv) && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
298 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U))); /* need to prefix only */ |
299 |
root |
1.1 |
else if (ix == 2) /* compress always */ |
300 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1))); |
301 |
root |
1.15 |
else if (SvNIOK (sv)) /* don't compress */ |
302 |
|
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{ |
303 |
|
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STRLEN len; |
304 |
|
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char *s = SvPV (sv, len); |
305 |
|
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XPUSHs (sv_2mortal (newSVpvn (s, len))); |
306 |
|
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} |
307 |
root |
1.1 |
else /* don't compress */ |
308 |
root |
1.15 |
XPUSHs (sv_2mortal (newSVsv (sv))); |
309 |
root |
1.1 |
|
310 |
|
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void |
311 |
|
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sthaw(sv) |
312 |
|
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SV * sv |
313 |
|
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PROTOTYPE: $ |
314 |
|
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PPCODE: |
315 |
|
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|
316 |
root |
1.9 |
int deref = 0; |
317 |
|
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|
318 |
root |
1.7 |
SvGETMAGIC (sv); |
319 |
root |
1.6 |
if (SvPOK (sv) && IN_RANGE (SvPV_nolen (sv)[0], MAGIC_LO, MAGIC_HI)) |
320 |
root |
1.1 |
{ |
321 |
|
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switch (SvPVX (sv)[0]) |
322 |
|
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{ |
323 |
root |
1.4 |
case MAGIC_undef: |
324 |
|
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XPUSHs (sv_2mortal (NEWSV (0, 0))); |
325 |
|
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break; |
326 |
|
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|
327 |
root |
1.1 |
case MAGIC_U: |
328 |
|
|
XPUSHs (sv_2mortal (decompress_sv (sv, 0))); |
329 |
|
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break; |
330 |
|
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|
331 |
|
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case MAGIC_C: |
332 |
|
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XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
333 |
|
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break; |
334 |
|
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|
335 |
root |
1.10 |
case MAGIC_R_deref: |
336 |
|
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deref = 1; |
337 |
|
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SvPVX (sv)[0] = MAGIC_R; |
338 |
|
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goto handle_MAGIC_R; |
339 |
|
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|
340 |
root |
1.9 |
case MAGIC_CR_deref: |
341 |
|
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deref = 1; |
342 |
root |
1.1 |
case MAGIC_CR: |
343 |
|
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sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
344 |
root |
1.10 |
if (deref) |
345 |
|
|
if (SvPVX (sv)[0] == MAGIC_R_deref) |
346 |
root |
1.9 |
SvPVX (sv)[0] = MAGIC_R; |
347 |
root |
1.10 |
else |
348 |
|
|
croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
349 |
|
|
|
350 |
root |
1.1 |
case MAGIC_R: |
351 |
root |
1.10 |
handle_MAGIC_R: |
352 |
root |
1.1 |
if (!storable_mstore) |
353 |
|
|
need_storable (); |
354 |
|
|
|
355 |
|
|
PUSHMARK (SP); |
356 |
|
|
XPUSHs (sv); |
357 |
|
|
PUTBACK; |
358 |
|
|
|
359 |
|
|
if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
360 |
|
|
croak ("Storable::mstore didn't return a single scalar"); |
361 |
|
|
|
362 |
|
|
SPAGAIN; |
363 |
|
|
|
364 |
root |
1.9 |
if (deref) |
365 |
|
|
{ |
366 |
root |
1.10 |
SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs)))); |
367 |
root |
1.9 |
|
368 |
|
|
if (SvPVX (sv)[0] == MAGIC_R) |
369 |
root |
1.10 |
SvPVX (sv)[0] = MAGIC_R_deref; |
370 |
root |
1.9 |
} |
371 |
root |
1.10 |
else |
372 |
pcg |
1.17 |
SETs (sv_2mortal (newSVsv (TOPs))); |
373 |
root |
1.1 |
|
374 |
|
|
break; |
375 |
|
|
|
376 |
|
|
default: |
377 |
|
|
croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
378 |
|
|
} |
379 |
|
|
} |
380 |
|
|
else |
381 |
root |
1.11 |
XPUSHs (sv_2mortal (newSVsv (sv))); |
382 |
pcg |
1.16 |
|