1 |
root |
1.1 |
#include "EXTERN.h" |
2 |
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#include "perl.h" |
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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 |
16 |
root |
1.1 |
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#include "lzf_c.c" |
18 |
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#include "lzf_d.c" |
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20 |
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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 */ |
26 |
root |
1.1 |
#define MAGIC_R 4 /* storable (reference, freeze) */ |
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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 |
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1.1 |
#define MAGIC_HI 7 /* room for one higher storable major */ |
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31 |
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#define IN_RANGE(v,l,h) ((unsigned int)((unsigned)(v) - (unsigned)(l)) <= (unsigned)(h) - (unsigned)(l)) |
32 |
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33 |
root |
1.14 |
static SV *serializer_package, *serializer_mstore, *serializer_mretrieve; |
34 |
root |
1.1 |
static CV *storable_mstore, *storable_mretrieve; |
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36 |
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static SV * |
37 |
root |
1.10 |
compress_sv (SV *data, char cprepend, int uprepend) |
38 |
root |
1.1 |
{ |
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STRLEN usize, csize; |
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char *src = (char *)SvPV (data, usize); |
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42 |
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if (usize) |
43 |
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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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48 |
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SvPOK_only (ret); |
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dst = (unsigned char *)SvPVX (ret); |
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51 |
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if (cprepend) |
52 |
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dst[skip++] = cprepend; |
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54 |
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if (usize < 0x80) |
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{ |
56 |
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dst[skip++] = usize; |
57 |
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} |
58 |
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else if (usize < 0x800) |
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{ |
60 |
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dst[skip++] = (( usize >> 6) | 0xc0); |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
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} |
63 |
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else if (usize < 0x10000) |
64 |
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{ |
65 |
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dst[skip++] = (( usize >> 12) | 0xe0); |
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dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
68 |
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} |
69 |
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else if (usize < 0x200000) |
70 |
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{ |
71 |
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dst[skip++] = (( usize >> 18) | 0xf0); |
72 |
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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); |
75 |
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} |
76 |
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else if (usize < 0x4000000) |
77 |
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{ |
78 |
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dst[skip++] = (( usize >> 24) | 0xf8); |
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dst[skip++] = (((usize >> 18) & 0x3f) | 0x80); |
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dst[skip++] = (((usize >> 12) & 0x3f) | 0x80); |
81 |
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dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
82 |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
83 |
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} |
84 |
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else |
85 |
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croak ("compress can only compress up to %ld bytes", 0x4000000-1); |
86 |
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87 |
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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, |
90 |
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dst + skip, |
91 |
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usize - skip); |
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93 |
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if (csize) |
94 |
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{ |
95 |
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SvCUR_set (ret, csize + skip); |
96 |
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} |
97 |
root |
1.10 |
else if (uprepend < 0) |
98 |
root |
1.1 |
{ |
99 |
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SvREFCNT_dec (ret); |
100 |
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ret = SvREFCNT_inc (data); |
101 |
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} |
102 |
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else |
103 |
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{ |
104 |
root |
1.10 |
*dst++ = uprepend; |
105 |
root |
1.1 |
|
106 |
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Move ((void *)src, (void *)dst, usize, unsigned char); |
107 |
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108 |
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SvCUR_set (ret, usize + 1); |
109 |
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} |
110 |
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111 |
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return ret; |
112 |
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} |
113 |
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else |
114 |
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return newSVpv ("", 0); |
115 |
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} |
116 |
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117 |
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static SV * |
118 |
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decompress_sv (SV *data, int skip) |
119 |
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{ |
120 |
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STRLEN usize, csize; |
121 |
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unsigned char *src = (unsigned char *)SvPV (data, csize) + skip; |
122 |
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123 |
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if (csize) |
124 |
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{ |
125 |
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void *dst; |
126 |
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SV *ret; |
127 |
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128 |
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csize -= skip; |
129 |
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130 |
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if (src[0]) |
131 |
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{ |
132 |
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if (!(src[0] & 0x80)) |
133 |
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{ |
134 |
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csize -= 1; |
135 |
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usize = *src++ & 0xff; |
136 |
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} |
137 |
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else if (!(src[0] & 0x20)) |
138 |
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{ |
139 |
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csize -= 2; |
140 |
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usize = *src++ & 0x1f; |
141 |
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usize = (usize << 6) | (*src++ & 0x3f); |
142 |
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} |
143 |
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else if (!(src[0] & 0x10)) |
144 |
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{ |
145 |
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csize -= 3; |
146 |
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usize = *src++ & 0x0f; |
147 |
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usize = (usize << 6) | (*src++ & 0x3f); |
148 |
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usize = (usize << 6) | (*src++ & 0x3f); |
149 |
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} |
150 |
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else if (!(src[0] & 0x08)) |
151 |
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{ |
152 |
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csize -= 4; |
153 |
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usize = *src++ & 0x07; |
154 |
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usize = (usize << 6) | (*src++ & 0x3f); |
155 |
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usize = (usize << 6) | (*src++ & 0x3f); |
156 |
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usize = (usize << 6) | (*src++ & 0x3f); |
157 |
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} |
158 |
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else if (!(src[0] & 0x04)) |
159 |
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{ |
160 |
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csize -= 5; |
161 |
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usize = *src++ & 0x03; |
162 |
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usize = (usize << 6) | (*src++ & 0x3f); |
163 |
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usize = (usize << 6) | (*src++ & 0x3f); |
164 |
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usize = (usize << 6) | (*src++ & 0x3f); |
165 |
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usize = (usize << 6) | (*src++ & 0x3f); |
166 |
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} |
167 |
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else |
168 |
root |
1.13 |
croak ("compressed data corrupted (invalid length)"); |
169 |
root |
1.1 |
|
170 |
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ret = NEWSV (0, usize); |
171 |
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SvPOK_only (ret); |
172 |
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dst = SvPVX (ret); |
173 |
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174 |
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if (lzf_decompress (src, csize, dst, usize) != usize) |
175 |
root |
1.13 |
croak ("compressed data corrupted (size mismatch)", csize, skip, usize); |
176 |
root |
1.1 |
} |
177 |
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else |
178 |
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{ |
179 |
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usize = csize - 1; |
180 |
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ret = NEWSV (0, usize); |
181 |
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SvPOK_only (ret); |
182 |
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183 |
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Move ((void *)(src + 1), (void *)SvPVX (ret), usize, unsigned char); |
184 |
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} |
185 |
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186 |
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SvCUR_set (ret, usize); |
187 |
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188 |
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return ret; |
189 |
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} |
190 |
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else |
191 |
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return newSVpvn ("", 0); |
192 |
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} |
193 |
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194 |
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static void |
195 |
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need_storable(void) |
196 |
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{ |
197 |
root |
1.2 |
#if PATCHLEVEL < 6 |
198 |
root |
1.14 |
char req[8192]; |
199 |
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sprintf (req, "require %s;", SvPV_nolen (serializer_package)); |
200 |
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perl_eval_pv (req, 1); |
201 |
root |
1.2 |
#else |
202 |
root |
1.14 |
load_module (PERL_LOADMOD_NOIMPORT, serializer_package, Nullsv); |
203 |
root |
1.2 |
#endif |
204 |
root |
1.1 |
|
205 |
root |
1.14 |
storable_mstore = GvCV (gv_fetchpv (SvPV_nolen (serializer_mstore ), TRUE, SVt_PVCV)); |
206 |
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storable_mretrieve = GvCV (gv_fetchpv (SvPV_nolen (serializer_mretrieve), TRUE, SVt_PVCV)); |
207 |
root |
1.1 |
} |
208 |
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209 |
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MODULE = Compress::LZF PACKAGE = Compress::LZF |
210 |
root |
1.14 |
|
211 |
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BOOT: |
212 |
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serializer_package = newSVpv ("Storable", 0); |
213 |
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serializer_mstore = newSVpv ("Storable::mstore", 0); |
214 |
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serializer_mretrieve = newSVpv ("Storable::mretrieve", 0); |
215 |
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216 |
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void |
217 |
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set_serializer(package, mstore, mretrieve) |
218 |
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SV * package |
219 |
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SV * mstore |
220 |
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SV * mretrieve |
221 |
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PROTOTYPE: $$$ |
222 |
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PPCODE: |
223 |
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SvSetSV (serializer_package , package ); |
224 |
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SvSetSV (serializer_mstore , mstore ); |
225 |
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SvSetSV (serializer_mretrieve, mretrieve); |
226 |
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storable_mstore = |
227 |
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storable_mretrieve = 0; |
228 |
root |
1.1 |
|
229 |
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void |
230 |
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compress(data) |
231 |
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SV * data |
232 |
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PROTOTYPE: $ |
233 |
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PPCODE: |
234 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U))); |
235 |
root |
1.1 |
|
236 |
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void |
237 |
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decompress(data) |
238 |
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SV * data |
239 |
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PROTOTYPE: $ |
240 |
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PPCODE: |
241 |
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XPUSHs (sv_2mortal (decompress_sv (data, 0))); |
242 |
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243 |
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void |
244 |
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sfreeze(sv) |
245 |
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SV * sv |
246 |
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ALIAS: |
247 |
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sfreeze_cr = 1 |
248 |
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sfreeze_c = 2 |
249 |
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PROTOTYPE: $ |
250 |
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PPCODE: |
251 |
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|
252 |
root |
1.10 |
SvGETMAGIC (sv); |
253 |
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254 |
root |
1.4 |
if (!SvOK (sv)) |
255 |
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XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
256 |
root |
1.12 |
else if (SvROK (sv) |
257 |
|
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|| (SvTYPE(sv) != SVt_IV |
258 |
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&& SvTYPE(sv) != SVt_NV |
259 |
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&& SvTYPE(sv) != SVt_PV |
260 |
root |
1.15 |
&& SvTYPE(sv) != SVt_PVIV |
261 |
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&& SvTYPE(sv) != SVt_PVNV |
262 |
root |
1.12 |
&& SvTYPE(sv) != SVt_PVMG)) /* mstore */ |
263 |
root |
1.1 |
{ |
264 |
root |
1.9 |
int deref = !SvROK (sv); |
265 |
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|
266 |
root |
1.1 |
if (!storable_mstore) |
267 |
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need_storable (); |
268 |
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|
269 |
root |
1.9 |
if (deref) |
270 |
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sv = newRV_noinc (sv); |
271 |
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272 |
root |
1.1 |
PUSHMARK (SP); |
273 |
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XPUSHs (sv); |
274 |
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PUTBACK; |
275 |
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|
276 |
|
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if (1 != call_sv ((SV *)storable_mstore, G_SCALAR)) |
277 |
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croak ("Storable::mstore didn't return a single scalar"); |
278 |
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279 |
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SPAGAIN; |
280 |
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281 |
|
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sv = POPs; |
282 |
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283 |
|
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if (SvPVX (sv)[0] != MAGIC_R) |
284 |
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croak ("Storable format changed, need newer version of Compress::LZF"); |
285 |
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|
286 |
root |
1.10 |
if (deref) |
287 |
|
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SvPVX (sv)[0] = MAGIC_R_deref; |
288 |
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|
289 |
root |
1.1 |
if (ix) /* compress */ |
290 |
root |
1.10 |
sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1)); |
291 |
root |
1.9 |
|
292 |
root |
1.10 |
XPUSHs (sv); |
293 |
root |
1.1 |
} |
294 |
root |
1.13 |
else if (SvPOKp (sv) && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
295 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U))); /* need to prefix only */ |
296 |
root |
1.1 |
else if (ix == 2) /* compress always */ |
297 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1))); |
298 |
root |
1.15 |
else if (SvNIOK (sv)) /* don't compress */ |
299 |
|
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{ |
300 |
|
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STRLEN len; |
301 |
|
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char *s = SvPV (sv, len); |
302 |
|
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XPUSHs (sv_2mortal (newSVpvn (s, len))); |
303 |
|
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} |
304 |
root |
1.1 |
else /* don't compress */ |
305 |
root |
1.15 |
XPUSHs (sv_2mortal (newSVsv (sv))); |
306 |
root |
1.1 |
|
307 |
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void |
308 |
|
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sthaw(sv) |
309 |
|
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SV * sv |
310 |
|
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PROTOTYPE: $ |
311 |
|
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PPCODE: |
312 |
|
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|
313 |
root |
1.9 |
int deref = 0; |
314 |
|
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|
315 |
root |
1.7 |
SvGETMAGIC (sv); |
316 |
root |
1.6 |
if (SvPOK (sv) && IN_RANGE (SvPV_nolen (sv)[0], MAGIC_LO, MAGIC_HI)) |
317 |
root |
1.1 |
{ |
318 |
|
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switch (SvPVX (sv)[0]) |
319 |
|
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{ |
320 |
root |
1.4 |
case MAGIC_undef: |
321 |
|
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XPUSHs (sv_2mortal (NEWSV (0, 0))); |
322 |
|
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break; |
323 |
|
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|
324 |
root |
1.1 |
case MAGIC_U: |
325 |
|
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XPUSHs (sv_2mortal (decompress_sv (sv, 0))); |
326 |
|
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break; |
327 |
|
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|
328 |
|
|
case MAGIC_C: |
329 |
|
|
XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
330 |
|
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break; |
331 |
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|
332 |
root |
1.10 |
case MAGIC_R_deref: |
333 |
|
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deref = 1; |
334 |
|
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SvPVX (sv)[0] = MAGIC_R; |
335 |
|
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goto handle_MAGIC_R; |
336 |
|
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|
337 |
root |
1.9 |
case MAGIC_CR_deref: |
338 |
|
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deref = 1; |
339 |
root |
1.1 |
case MAGIC_CR: |
340 |
|
|
sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
341 |
root |
1.10 |
if (deref) |
342 |
|
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if (SvPVX (sv)[0] == MAGIC_R_deref) |
343 |
root |
1.9 |
SvPVX (sv)[0] = MAGIC_R; |
344 |
root |
1.10 |
else |
345 |
|
|
croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
346 |
|
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|
347 |
root |
1.1 |
case MAGIC_R: |
348 |
root |
1.10 |
handle_MAGIC_R: |
349 |
root |
1.1 |
if (!storable_mstore) |
350 |
|
|
need_storable (); |
351 |
|
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|
352 |
|
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PUSHMARK (SP); |
353 |
|
|
XPUSHs (sv); |
354 |
|
|
PUTBACK; |
355 |
|
|
|
356 |
|
|
if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
357 |
|
|
croak ("Storable::mstore didn't return a single scalar"); |
358 |
|
|
|
359 |
|
|
SPAGAIN; |
360 |
|
|
|
361 |
root |
1.9 |
if (deref) |
362 |
|
|
{ |
363 |
root |
1.10 |
SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs)))); |
364 |
root |
1.9 |
|
365 |
|
|
if (SvPVX (sv)[0] == MAGIC_R) |
366 |
root |
1.10 |
SvPVX (sv)[0] = MAGIC_R_deref; |
367 |
root |
1.9 |
} |
368 |
root |
1.10 |
else |
369 |
|
|
XPUSHs (POPs); /* this is a nop, hopefully */ |
370 |
root |
1.1 |
|
371 |
|
|
break; |
372 |
|
|
|
373 |
|
|
default: |
374 |
|
|
croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
375 |
|
|
} |
376 |
|
|
} |
377 |
|
|
else |
378 |
root |
1.11 |
XPUSHs (sv_2mortal (newSVsv (sv))); |
379 |
pcg |
1.16 |
|