1 |
root |
1.1 |
#include "EXTERN.h" |
2 |
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#include "perl.h" |
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#include "XSUB.h" |
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5 |
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/* try to be compatible with older perls */ |
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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 |
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#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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1.4 |
#define MAGIC_undef 2 /* the special value undef */ |
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#define MAGIC_CR 3 /* storable (reference, freeze), compressed */ |
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1.1 |
#define MAGIC_R 4 /* storable (reference, freeze) */ |
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1.9 |
#define MAGIC_CR_deref 5 /* storable (NO reference, freeze), compressed */ |
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1.10 |
#define MAGIC_R_deref 6 /* storable (NO reference, freeze) */ |
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1.1 |
#define MAGIC_HI 7 /* room for one higher storable major */ |
30 |
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1.20 |
/* for historical reasons, MAGIC_undef + MAGIC_R and MAGIC_undef + MAGIC_R_deref are used, too */ |
31 |
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1.1 |
|
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#define IN_RANGE(v,l,h) ((unsigned int)((unsigned)(v) - (unsigned)(l)) <= (unsigned)(h) - (unsigned)(l)) |
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root |
1.14 |
static SV *serializer_package, *serializer_mstore, *serializer_mretrieve; |
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1.1 |
static CV *storable_mstore, *storable_mretrieve; |
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1.20 |
#if Size_t_size > 4 |
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# define MAX_LENGTH ((Size_t)0x80000000L) |
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#else |
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# define MAX_LENGTH ((Size_t) 0x8000000L) |
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#endif |
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43 |
root |
1.1 |
static SV * |
44 |
root |
1.10 |
compress_sv (SV *data, char cprepend, int uprepend) |
45 |
root |
1.1 |
{ |
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STRLEN usize, csize; |
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char *src = (char *)SvPV (data, usize); |
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if (usize) |
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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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SvPOK_only (ret); |
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dst = (unsigned char *)SvPVX (ret); |
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if (cprepend) |
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dst[skip++] = cprepend; |
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1.20 |
if (usize <= 0x7f) |
62 |
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1.1 |
{ |
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dst[skip++] = usize; |
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} |
65 |
root |
1.20 |
else if (usize <= 0x7ff) |
66 |
root |
1.1 |
{ |
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dst[skip++] = (( usize >> 6) | 0xc0); |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
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} |
70 |
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1.20 |
else if (usize <= 0xffff) |
71 |
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1.1 |
{ |
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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); |
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} |
76 |
root |
1.20 |
else if (usize <= 0x1fffff) |
77 |
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1.1 |
{ |
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dst[skip++] = (( usize >> 18) | 0xf0); |
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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); |
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} |
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root |
1.20 |
else if (usize <= 0x3ffffff) |
84 |
root |
1.1 |
{ |
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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); |
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dst[skip++] = (((usize >> 6) & 0x3f) | 0x80); |
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dst[skip++] = (( usize & 0x3f) | 0x80); |
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} |
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root |
1.20 |
else if (usize <= 0x7fffffff) |
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{ |
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dst[skip++] = (( usize >> 30) | 0xfc); |
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dst[skip++] = (((usize >> 24) & 0x3f) | 0x80); |
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dst[skip++] = (((usize >> 18) & 0x3f) | 0x80); |
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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); |
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} |
100 |
root |
1.1 |
else |
101 |
root |
1.20 |
croak ("compress can only compress up to %ld bytes", 0x7fffffffL); |
102 |
root |
1.1 |
|
103 |
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/* 11 bytes is the smallest compressible string */ |
104 |
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csize = usize < 11 ? 0 : |
105 |
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lzf_compress (src, usize, |
106 |
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dst + skip, |
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usize - skip); |
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109 |
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if (csize) |
110 |
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{ |
111 |
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SvCUR_set (ret, csize + skip); |
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} |
113 |
root |
1.10 |
else if (uprepend < 0) |
114 |
root |
1.1 |
{ |
115 |
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SvREFCNT_dec (ret); |
116 |
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ret = SvREFCNT_inc (data); |
117 |
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} |
118 |
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else |
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{ |
120 |
root |
1.10 |
*dst++ = uprepend; |
121 |
root |
1.1 |
|
122 |
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Move ((void *)src, (void *)dst, usize, unsigned char); |
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124 |
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SvCUR_set (ret, usize + 1); |
125 |
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} |
126 |
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127 |
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return ret; |
128 |
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} |
129 |
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else |
130 |
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return newSVpv ("", 0); |
131 |
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} |
132 |
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133 |
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static SV * |
134 |
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decompress_sv (SV *data, int skip) |
135 |
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{ |
136 |
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STRLEN usize, csize; |
137 |
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unsigned char *src = (unsigned char *)SvPV (data, csize) + skip; |
138 |
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139 |
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if (csize) |
140 |
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{ |
141 |
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void *dst; |
142 |
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SV *ret; |
143 |
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144 |
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csize -= skip; |
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146 |
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if (src[0]) |
147 |
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{ |
148 |
root |
1.21 |
if (!(src[0] & 0x80) && csize >= 1) |
149 |
root |
1.1 |
{ |
150 |
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csize -= 1; |
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usize = *src++ & 0xff; |
152 |
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} |
153 |
root |
1.21 |
else if (!(src[0] & 0x20) && csize >= 2) |
154 |
root |
1.1 |
{ |
155 |
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csize -= 2; |
156 |
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usize = *src++ & 0x1f; |
157 |
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usize = (usize << 6) | (*src++ & 0x3f); |
158 |
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} |
159 |
root |
1.21 |
else if (!(src[0] & 0x10) && csize >= 3) |
160 |
root |
1.1 |
{ |
161 |
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csize -= 3; |
162 |
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usize = *src++ & 0x0f; |
163 |
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usize = (usize << 6) | (*src++ & 0x3f); |
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usize = (usize << 6) | (*src++ & 0x3f); |
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} |
166 |
root |
1.21 |
else if (!(src[0] & 0x08) && csize >= 4) |
167 |
root |
1.1 |
{ |
168 |
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csize -= 4; |
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usize = *src++ & 0x07; |
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usize = (usize << 6) | (*src++ & 0x3f); |
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usize = (usize << 6) | (*src++ & 0x3f); |
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usize = (usize << 6) | (*src++ & 0x3f); |
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} |
174 |
root |
1.21 |
else if (!(src[0] & 0x04) && csize >= 5) |
175 |
root |
1.1 |
{ |
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csize -= 5; |
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usize = *src++ & 0x03; |
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usize = (usize << 6) | (*src++ & 0x3f); |
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usize = (usize << 6) | (*src++ & 0x3f); |
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usize = (usize << 6) | (*src++ & 0x3f); |
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usize = (usize << 6) | (*src++ & 0x3f); |
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} |
183 |
root |
1.21 |
else if (!(src[0] & 0x02) && csize >= 6) |
184 |
root |
1.20 |
{ |
185 |
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csize -= 6; |
186 |
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usize = *src++ & 0x01; |
187 |
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usize = (usize << 6) | (*src++ & 0x3f); |
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usize = (usize << 6) | (*src++ & 0x3f); |
189 |
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usize = (usize << 6) | (*src++ & 0x3f); |
190 |
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usize = (usize << 6) | (*src++ & 0x3f); |
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usize = (usize << 6) | (*src++ & 0x3f); |
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} |
193 |
root |
1.1 |
else |
194 |
root |
1.13 |
croak ("compressed data corrupted (invalid length)"); |
195 |
root |
1.21 |
|
196 |
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if (!usize) |
197 |
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croak ("compressed data corrupted (invalid length)"); |
198 |
root |
1.1 |
|
199 |
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ret = NEWSV (0, usize); |
200 |
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SvPOK_only (ret); |
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dst = SvPVX (ret); |
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203 |
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if (lzf_decompress (src, csize, dst, usize) != usize) |
204 |
root |
1.13 |
croak ("compressed data corrupted (size mismatch)", csize, skip, usize); |
205 |
root |
1.1 |
} |
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else |
207 |
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{ |
208 |
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usize = csize - 1; |
209 |
root |
1.21 |
ret = NEWSV (0, usize | 1); |
210 |
root |
1.1 |
SvPOK_only (ret); |
211 |
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212 |
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Move ((void *)(src + 1), (void *)SvPVX (ret), usize, unsigned char); |
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} |
214 |
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215 |
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SvCUR_set (ret, usize); |
216 |
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217 |
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return ret; |
218 |
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} |
219 |
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else |
220 |
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return newSVpvn ("", 0); |
221 |
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} |
222 |
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223 |
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static void |
224 |
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need_storable(void) |
225 |
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{ |
226 |
root |
1.2 |
#if PATCHLEVEL < 6 |
227 |
root |
1.14 |
char req[8192]; |
228 |
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sprintf (req, "require %s;", SvPV_nolen (serializer_package)); |
229 |
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perl_eval_pv (req, 1); |
230 |
root |
1.2 |
#else |
231 |
root |
1.14 |
load_module (PERL_LOADMOD_NOIMPORT, serializer_package, Nullsv); |
232 |
root |
1.2 |
#endif |
233 |
root |
1.1 |
|
234 |
root |
1.14 |
storable_mstore = GvCV (gv_fetchpv (SvPV_nolen (serializer_mstore ), TRUE, SVt_PVCV)); |
235 |
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storable_mretrieve = GvCV (gv_fetchpv (SvPV_nolen (serializer_mretrieve), TRUE, SVt_PVCV)); |
236 |
root |
1.1 |
} |
237 |
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238 |
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MODULE = Compress::LZF PACKAGE = Compress::LZF |
239 |
root |
1.14 |
|
240 |
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BOOT: |
241 |
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serializer_package = newSVpv ("Storable", 0); |
242 |
root |
1.20 |
serializer_mstore = newSVpv ("Storable::net_mstore", 0); |
243 |
root |
1.14 |
serializer_mretrieve = newSVpv ("Storable::mretrieve", 0); |
244 |
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245 |
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void |
246 |
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set_serializer(package, mstore, mretrieve) |
247 |
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SV * package |
248 |
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SV * mstore |
249 |
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SV * mretrieve |
250 |
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PROTOTYPE: $$$ |
251 |
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PPCODE: |
252 |
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SvSetSV (serializer_package , package ); |
253 |
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SvSetSV (serializer_mstore , mstore ); |
254 |
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SvSetSV (serializer_mretrieve, mretrieve); |
255 |
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storable_mstore = |
256 |
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storable_mretrieve = 0; |
257 |
root |
1.1 |
|
258 |
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void |
259 |
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compress(data) |
260 |
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SV * data |
261 |
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PROTOTYPE: $ |
262 |
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PPCODE: |
263 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (data, 0, MAGIC_U))); |
264 |
root |
1.1 |
|
265 |
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void |
266 |
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decompress(data) |
267 |
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SV * data |
268 |
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PROTOTYPE: $ |
269 |
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PPCODE: |
270 |
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XPUSHs (sv_2mortal (decompress_sv (data, 0))); |
271 |
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272 |
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void |
273 |
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sfreeze(sv) |
274 |
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SV * sv |
275 |
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ALIAS: |
276 |
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sfreeze_cr = 1 |
277 |
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sfreeze_c = 2 |
278 |
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PROTOTYPE: $ |
279 |
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PPCODE: |
280 |
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|
281 |
root |
1.10 |
SvGETMAGIC (sv); |
282 |
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283 |
root |
1.4 |
if (!SvOK (sv)) |
284 |
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XPUSHs (sv_2mortal (newSVpvn ("\02", 1))); /* 02 == MAGIC_undef */ |
285 |
root |
1.12 |
else if (SvROK (sv) |
286 |
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|| (SvTYPE(sv) != SVt_IV |
287 |
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&& SvTYPE(sv) != SVt_NV |
288 |
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&& SvTYPE(sv) != SVt_PV |
289 |
root |
1.15 |
&& SvTYPE(sv) != SVt_PVIV |
290 |
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&& SvTYPE(sv) != SVt_PVNV |
291 |
root |
1.12 |
&& SvTYPE(sv) != SVt_PVMG)) /* mstore */ |
292 |
root |
1.1 |
{ |
293 |
root |
1.9 |
int deref = !SvROK (sv); |
294 |
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|
295 |
root |
1.1 |
if (!storable_mstore) |
296 |
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need_storable (); |
297 |
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298 |
root |
1.9 |
if (deref) |
299 |
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sv = newRV_noinc (sv); |
300 |
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301 |
root |
1.1 |
PUSHMARK (SP); |
302 |
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XPUSHs (sv); |
303 |
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PUTBACK; |
304 |
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305 |
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if (1 != call_sv ((SV *)storable_mstore, G_SCALAR)) |
306 |
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croak ("Storable::mstore didn't return a single scalar"); |
307 |
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308 |
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SPAGAIN; |
309 |
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310 |
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sv = POPs; |
311 |
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312 |
root |
1.20 |
if (SvPVX (sv)[0] == MAGIC_R) |
313 |
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{ |
314 |
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if (deref) |
315 |
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SvPVX (sv)[0] = MAGIC_R_deref; |
316 |
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} |
317 |
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else |
318 |
|
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{ |
319 |
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char pfx[2]; |
320 |
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321 |
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pfx[0] = MAGIC_undef; |
322 |
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pfx[1] = deref ? MAGIC_R_deref : MAGIC_R; |
323 |
root |
1.1 |
|
324 |
root |
1.20 |
sv_insert (sv, 0, 0, pfx, 2); |
325 |
|
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} |
326 |
root |
1.10 |
|
327 |
root |
1.1 |
if (ix) /* compress */ |
328 |
root |
1.10 |
sv = sv_2mortal (compress_sv (sv, deref ? MAGIC_CR_deref : MAGIC_CR, -1)); |
329 |
root |
1.9 |
|
330 |
root |
1.10 |
XPUSHs (sv); |
331 |
root |
1.1 |
} |
332 |
root |
1.13 |
else if (SvPOKp (sv) && IN_RANGE (SvPVX (sv)[0], MAGIC_LO, MAGIC_HI)) |
333 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, MAGIC_U))); /* need to prefix only */ |
334 |
root |
1.1 |
else if (ix == 2) /* compress always */ |
335 |
root |
1.10 |
XPUSHs (sv_2mortal (compress_sv (sv, MAGIC_C, -1))); |
336 |
root |
1.15 |
else if (SvNIOK (sv)) /* don't compress */ |
337 |
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{ |
338 |
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STRLEN len; |
339 |
|
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char *s = SvPV (sv, len); |
340 |
|
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XPUSHs (sv_2mortal (newSVpvn (s, len))); |
341 |
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} |
342 |
root |
1.1 |
else /* don't compress */ |
343 |
root |
1.15 |
XPUSHs (sv_2mortal (newSVsv (sv))); |
344 |
root |
1.1 |
|
345 |
|
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void |
346 |
|
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sthaw(sv) |
347 |
|
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SV * sv |
348 |
|
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PROTOTYPE: $ |
349 |
|
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PPCODE: |
350 |
root |
1.20 |
{ |
351 |
|
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STRLEN svlen; |
352 |
root |
1.9 |
int deref = 0; |
353 |
|
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|
354 |
root |
1.7 |
SvGETMAGIC (sv); |
355 |
root |
1.20 |
if (SvPOK (sv) && IN_RANGE (SvPV (sv, svlen)[0], MAGIC_LO, MAGIC_HI)) |
356 |
root |
1.1 |
{ |
357 |
root |
1.20 |
redo: |
358 |
|
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|
359 |
root |
1.1 |
switch (SvPVX (sv)[0]) |
360 |
|
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{ |
361 |
root |
1.4 |
case MAGIC_undef: |
362 |
root |
1.20 |
if (svlen <= 1) |
363 |
|
|
XPUSHs (sv_2mortal (NEWSV (0, 0))); |
364 |
|
|
else |
365 |
|
|
{ |
366 |
|
|
if (SvPVX (sv)[1] == MAGIC_R_deref) |
367 |
|
|
deref = 1; |
368 |
|
|
else if (SvPVX (sv)[1] != MAGIC_R) |
369 |
|
|
croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
370 |
|
|
|
371 |
|
|
sv_chop (sv, SvPVX (sv) + 2); |
372 |
|
|
|
373 |
|
|
if (!storable_mstore) |
374 |
|
|
need_storable (); |
375 |
|
|
|
376 |
|
|
PUSHMARK (SP); |
377 |
|
|
XPUSHs (sv); |
378 |
|
|
PUTBACK; |
379 |
|
|
|
380 |
|
|
if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
381 |
|
|
croak ("Storable::mstore didn't return a single scalar"); |
382 |
|
|
|
383 |
|
|
SPAGAIN; |
384 |
|
|
|
385 |
|
|
if (deref) |
386 |
|
|
SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs)))); |
387 |
|
|
else |
388 |
|
|
SETs (sv_2mortal (newSVsv (TOPs))); |
389 |
|
|
} |
390 |
root |
1.4 |
break; |
391 |
|
|
|
392 |
root |
1.1 |
case MAGIC_U: |
393 |
|
|
XPUSHs (sv_2mortal (decompress_sv (sv, 0))); |
394 |
|
|
break; |
395 |
|
|
|
396 |
|
|
case MAGIC_C: |
397 |
|
|
XPUSHs (sv_2mortal (decompress_sv (sv, 1))); |
398 |
|
|
break; |
399 |
|
|
|
400 |
root |
1.10 |
case MAGIC_R_deref: |
401 |
|
|
deref = 1; |
402 |
|
|
SvPVX (sv)[0] = MAGIC_R; |
403 |
|
|
goto handle_MAGIC_R; |
404 |
|
|
|
405 |
root |
1.9 |
case MAGIC_CR_deref: |
406 |
|
|
deref = 1; |
407 |
root |
1.1 |
case MAGIC_CR: |
408 |
|
|
sv = sv_2mortal (decompress_sv (sv, 1)); /* mortal could be optimized */ |
409 |
root |
1.10 |
if (deref) |
410 |
|
|
if (SvPVX (sv)[0] == MAGIC_R_deref) |
411 |
root |
1.9 |
SvPVX (sv)[0] = MAGIC_R; |
412 |
root |
1.20 |
|
413 |
|
|
goto redo; |
414 |
root |
1.10 |
|
415 |
root |
1.1 |
case MAGIC_R: |
416 |
root |
1.10 |
handle_MAGIC_R: |
417 |
root |
1.1 |
if (!storable_mstore) |
418 |
|
|
need_storable (); |
419 |
|
|
|
420 |
|
|
PUSHMARK (SP); |
421 |
|
|
XPUSHs (sv); |
422 |
|
|
PUTBACK; |
423 |
|
|
|
424 |
|
|
if (1 != call_sv ((SV *)storable_mretrieve, G_SCALAR)) |
425 |
|
|
croak ("Storable::mstore didn't return a single scalar"); |
426 |
|
|
|
427 |
|
|
SPAGAIN; |
428 |
|
|
|
429 |
root |
1.9 |
if (deref) |
430 |
|
|
{ |
431 |
root |
1.10 |
SETs (sv_2mortal (SvREFCNT_inc (SvRV (TOPs)))); |
432 |
root |
1.9 |
|
433 |
|
|
if (SvPVX (sv)[0] == MAGIC_R) |
434 |
root |
1.10 |
SvPVX (sv)[0] = MAGIC_R_deref; |
435 |
root |
1.9 |
} |
436 |
root |
1.10 |
else |
437 |
pcg |
1.17 |
SETs (sv_2mortal (newSVsv (TOPs))); |
438 |
root |
1.1 |
|
439 |
|
|
break; |
440 |
|
|
|
441 |
|
|
default: |
442 |
|
|
croak ("Compress::LZF::sthaw(): invalid data, maybe you need a newer version of Compress::LZF?"); |
443 |
|
|
} |
444 |
|
|
} |
445 |
|
|
else |
446 |
root |
1.11 |
XPUSHs (sv_2mortal (newSVsv (sv))); |
447 |
root |
1.20 |
} |
448 |
pcg |
1.16 |
|