1 |
root |
1.1 |
#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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#include <assert.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <limits.h> |
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#include <float.h> |
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#include "ecb.h" |
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1.14 |
// compatibility with perl <5.18 |
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#ifndef HvNAMELEN_get |
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# define HvNAMELEN_get(hv) strlen (HvNAME (hv)) |
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#endif |
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#ifndef HvNAMELEN |
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# define HvNAMELEN(hv) HvNAMELEN_get (hv) |
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#endif |
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#ifndef HvNAMEUTF8 |
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# define HvNAMEUTF8(hv) 0 |
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#endif |
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25 |
root |
1.9 |
// known tags |
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1.8 |
enum cbor_tag |
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{ |
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1.9 |
// inofficial extensions (pending iana registration) |
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CBOR_TAG_PERL_OBJECT = 256, |
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CBOR_TAG_GENERIC_OBJECT = 257, |
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// rfc7049 |
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CBOR_TAG_DATETIME = 0, // rfc4287, utf-8 |
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CBOR_TAG_TIMESTAMP = 1, // unix timestamp, any |
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CBOR_TAG_POS_BIGNUM = 2, // byte string |
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CBOR_TAG_NEG_BIGNUM = 3, // byte string |
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CBOR_TAG_DECIMAL = 4, // decimal fraction, array |
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CBOR_TAG_BIGFLOAT = 5, // array |
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40 |
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CBOR_TAG_CONV_B64U = 21, // base64url, any |
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CBOR_TAG_CONV_B64 = 22, // base64, any |
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CBOR_TAG_CONV_HEX = 23, // base16, any |
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CBOR_TAG_CBOR = 24, // embedded cbor, byte string |
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CBOR_TAG_URI = 32, // URI rfc3986, utf-8 |
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CBOR_TAG_B64U = 33, // base64url rfc4648, utf-8 |
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CBOR_TAG_B64 = 34, // base6 rfc46484, utf-8 |
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CBOR_TAG_REGEX = 35, // regex pcre/ecma262, utf-8 |
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CBOR_TAG_MIME = 36, // mime message rfc2045, utf-8 |
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root |
1.8 |
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51 |
root |
1.9 |
CBOR_TAG_MAGIC = 55799 // self-describe cbor |
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root |
1.8 |
}; |
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root |
1.1 |
#define F_SHRINK 0x00000200UL |
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#define F_ALLOW_UNKNOWN 0x00002000UL |
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#define INIT_SIZE 32 // initial scalar size to be allocated |
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#define SB do { |
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#define SE } while (0) |
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#define IN_RANGE_INC(type,val,beg,end) \ |
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((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \ |
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<= (unsigned type)((unsigned type)(end) - (unsigned type)(beg))) |
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#define ERR_NESTING_EXCEEDED "cbor text or perl structure exceeds maximum nesting level (max_depth set too low?)" |
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#ifdef USE_ITHREADS |
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# define CBOR_SLOW 1 |
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# define CBOR_STASH (cbor_stash ? cbor_stash : gv_stashpv ("CBOR::XS", 1)) |
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#else |
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# define CBOR_SLOW 0 |
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# define CBOR_STASH cbor_stash |
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#endif |
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1.10 |
static HV *cbor_stash, *types_boolean_stash, *types_error_stash, *cbor_tagged_stash; // CBOR::XS:: |
77 |
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1.11 |
static SV *types_true, *types_false, *types_error, *sv_cbor; |
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1.1 |
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typedef struct { |
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U32 flags; |
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U32 max_depth; |
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STRLEN max_size; |
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} CBOR; |
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85 |
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1.5 |
ecb_inline void |
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1.1 |
cbor_init (CBOR *cbor) |
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{ |
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Zero (cbor, 1, CBOR); |
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cbor->max_depth = 512; |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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// utility functions |
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1.5 |
ecb_inline SV * |
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1.1 |
get_bool (const char *name) |
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{ |
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SV *sv = get_sv (name, 1); |
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100 |
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SvREADONLY_on (sv); |
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SvREADONLY_on (SvRV (sv)); |
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103 |
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return sv; |
104 |
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} |
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106 |
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1.5 |
ecb_inline void |
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root |
1.1 |
shrink (SV *sv) |
108 |
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{ |
109 |
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sv_utf8_downgrade (sv, 1); |
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111 |
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if (SvLEN (sv) > SvCUR (sv) + 1) |
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{ |
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#ifdef SvPV_shrink_to_cur |
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SvPV_shrink_to_cur (sv); |
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#elif defined (SvPV_renew) |
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SvPV_renew (sv, SvCUR (sv) + 1); |
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#endif |
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} |
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} |
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121 |
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///////////////////////////////////////////////////////////////////////////// |
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// fp hell |
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124 |
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//TODO |
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126 |
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///////////////////////////////////////////////////////////////////////////// |
127 |
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// encoder |
128 |
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129 |
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// structure used for encoding CBOR |
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typedef struct |
131 |
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{ |
132 |
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char *cur; // SvPVX (sv) + current output position |
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char *end; // SvEND (sv) |
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SV *sv; // result scalar |
135 |
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CBOR cbor; |
136 |
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U32 depth; // recursion level |
137 |
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} enc_t; |
138 |
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139 |
root |
1.5 |
ecb_inline void |
140 |
root |
1.1 |
need (enc_t *enc, STRLEN len) |
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{ |
142 |
root |
1.5 |
if (ecb_expect_false (enc->cur + len >= enc->end)) |
143 |
root |
1.1 |
{ |
144 |
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STRLEN cur = enc->cur - (char *)SvPVX (enc->sv); |
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SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
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enc->cur = SvPVX (enc->sv) + cur; |
147 |
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enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
148 |
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} |
149 |
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} |
150 |
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151 |
root |
1.5 |
ecb_inline void |
152 |
root |
1.1 |
encode_ch (enc_t *enc, char ch) |
153 |
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{ |
154 |
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need (enc, 1); |
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*enc->cur++ = ch; |
156 |
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} |
157 |
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158 |
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static void |
159 |
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encode_uint (enc_t *enc, int major, UV len) |
160 |
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{ |
161 |
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need (enc, 9); |
162 |
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163 |
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if (len < 24) |
164 |
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*enc->cur++ = major | len; |
165 |
root |
1.4 |
else if (len <= 0xff) |
166 |
root |
1.1 |
{ |
167 |
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*enc->cur++ = major | 24; |
168 |
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*enc->cur++ = len; |
169 |
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} |
170 |
root |
1.4 |
else if (len <= 0xffff) |
171 |
root |
1.1 |
{ |
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*enc->cur++ = major | 25; |
173 |
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*enc->cur++ = len >> 8; |
174 |
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*enc->cur++ = len; |
175 |
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} |
176 |
root |
1.4 |
else if (len <= 0xffffffff) |
177 |
root |
1.1 |
{ |
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*enc->cur++ = major | 26; |
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*enc->cur++ = len >> 24; |
180 |
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*enc->cur++ = len >> 16; |
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*enc->cur++ = len >> 8; |
182 |
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*enc->cur++ = len; |
183 |
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} |
184 |
root |
1.4 |
else |
185 |
root |
1.1 |
{ |
186 |
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*enc->cur++ = major | 27; |
187 |
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*enc->cur++ = len >> 56; |
188 |
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*enc->cur++ = len >> 48; |
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*enc->cur++ = len >> 40; |
190 |
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*enc->cur++ = len >> 32; |
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*enc->cur++ = len >> 24; |
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*enc->cur++ = len >> 16; |
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*enc->cur++ = len >> 8; |
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*enc->cur++ = len; |
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} |
196 |
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} |
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198 |
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static void |
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encode_str (enc_t *enc, int utf8, char *str, STRLEN len) |
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{ |
201 |
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encode_uint (enc, utf8 ? 0x60 : 0x40, len); |
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need (enc, len); |
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memcpy (enc->cur, str, len); |
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enc->cur += len; |
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} |
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207 |
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static void encode_sv (enc_t *enc, SV *sv); |
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static void |
210 |
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encode_av (enc_t *enc, AV *av) |
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{ |
212 |
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int i, len = av_len (av); |
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214 |
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if (enc->depth >= enc->cbor.max_depth) |
215 |
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croak (ERR_NESTING_EXCEEDED); |
216 |
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217 |
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++enc->depth; |
218 |
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219 |
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encode_uint (enc, 0x80, len + 1); |
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221 |
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for (i = 0; i <= len; ++i) |
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{ |
223 |
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SV **svp = av_fetch (av, i, 0); |
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encode_sv (enc, svp ? *svp : &PL_sv_undef); |
225 |
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} |
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227 |
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--enc->depth; |
228 |
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} |
229 |
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230 |
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static void |
231 |
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encode_hv (enc_t *enc, HV *hv) |
232 |
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{ |
233 |
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HE *he; |
234 |
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235 |
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if (enc->depth >= enc->cbor.max_depth) |
236 |
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croak (ERR_NESTING_EXCEEDED); |
237 |
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238 |
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++enc->depth; |
239 |
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240 |
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int pairs = hv_iterinit (hv); |
241 |
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int mg = SvMAGICAL (hv); |
242 |
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243 |
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if (mg) |
244 |
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encode_ch (enc, 0xa0 | 31); |
245 |
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else |
246 |
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encode_uint (enc, 0xa0, pairs); |
247 |
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248 |
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while ((he = hv_iternext (hv))) |
249 |
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{ |
250 |
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if (HeKLEN (he) == HEf_SVKEY) |
251 |
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encode_sv (enc, HeSVKEY (he)); |
252 |
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else |
253 |
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encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he)); |
254 |
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255 |
root |
1.5 |
encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he)); |
256 |
root |
1.1 |
} |
257 |
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258 |
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if (mg) |
259 |
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encode_ch (enc, 0xe0 | 31); |
260 |
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261 |
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--enc->depth; |
262 |
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} |
263 |
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264 |
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// encode objects, arrays and special \0=false and \1=true values. |
265 |
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static void |
266 |
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encode_rv (enc_t *enc, SV *sv) |
267 |
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{ |
268 |
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svtype svt; |
269 |
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270 |
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SvGETMAGIC (sv); |
271 |
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svt = SvTYPE (sv); |
272 |
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273 |
root |
1.5 |
if (ecb_expect_false (SvOBJECT (sv))) |
274 |
root |
1.1 |
{ |
275 |
root |
1.10 |
HV *boolean_stash = !CBOR_SLOW || types_boolean_stash |
276 |
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? types_boolean_stash |
277 |
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: gv_stashpv ("Types::Serialiser::Boolean", 1); |
278 |
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HV *error_stash = !CBOR_SLOW || types_error_stash |
279 |
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? types_error_stash |
280 |
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: gv_stashpv ("Types::Serialiser::Error", 1); |
281 |
root |
1.6 |
HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash |
282 |
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? cbor_tagged_stash |
283 |
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: gv_stashpv ("CBOR::XS::Tagged" , 1); |
284 |
root |
1.1 |
|
285 |
root |
1.11 |
HV *stash = SvSTASH (sv); |
286 |
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GV *method; |
287 |
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288 |
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if (stash == boolean_stash) |
289 |
root |
1.1 |
encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20); |
290 |
root |
1.11 |
else if (stash == error_stash) |
291 |
root |
1.10 |
encode_ch (enc, 0xe0 | 23); |
292 |
root |
1.11 |
else if (stash == tagged_stash) |
293 |
root |
1.6 |
{ |
294 |
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if (svt != SVt_PVAV) |
295 |
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croak ("encountered CBOR::XS::Tagged object that isn't an array"); |
296 |
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297 |
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encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1))); |
298 |
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encode_sv (enc, *av_fetch ((AV *)sv, 1, 1)); |
299 |
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} |
300 |
root |
1.11 |
else if ((method = gv_fetchmethod_autoload (stash, "TO_CBOR", 0))) |
301 |
root |
1.1 |
{ |
302 |
root |
1.11 |
dSP; |
303 |
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304 |
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ENTER; SAVETMPS; PUSHMARK (SP); |
305 |
root |
1.6 |
// we re-bless the reference to get overload and other niceties right |
306 |
root |
1.11 |
XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); |
307 |
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308 |
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PUTBACK; |
309 |
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// G_SCALAR ensures that return value is 1 |
310 |
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call_sv ((SV *)GvCV (method), G_SCALAR); |
311 |
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SPAGAIN; |
312 |
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313 |
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// catch this surprisingly common error |
314 |
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if (SvROK (TOPs) && SvRV (TOPs) == sv) |
315 |
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croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (stash)); |
316 |
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317 |
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encode_sv (enc, POPs); |
318 |
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319 |
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PUTBACK; |
320 |
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321 |
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FREETMPS; LEAVE; |
322 |
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} |
323 |
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else if ((method = gv_fetchmethod_autoload (stash, "FREEZE", 0)) != 0) |
324 |
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{ |
325 |
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dSP; |
326 |
root |
1.6 |
|
327 |
root |
1.11 |
ENTER; SAVETMPS; PUSHMARK (SP); |
328 |
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EXTEND (SP, 2); |
329 |
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// we re-bless the reference to get overload and other niceties right |
330 |
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PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash)); |
331 |
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PUSHs (sv_cbor); |
332 |
root |
1.1 |
|
333 |
root |
1.11 |
PUTBACK; |
334 |
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int count = call_sv ((SV *)GvCV (method), G_ARRAY); |
335 |
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SPAGAIN; |
336 |
root |
1.6 |
|
337 |
root |
1.11 |
// catch this surprisingly common error |
338 |
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if (count == 1 && SvROK (TOPs) && SvRV (TOPs) == sv) |
339 |
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croak ("%s::FREEZE(CBOR) method returned same object as was passed instead of a new one", HvNAME (stash)); |
340 |
root |
1.6 |
|
341 |
root |
1.11 |
encode_uint (enc, 0xc0, CBOR_TAG_PERL_OBJECT); |
342 |
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encode_uint (enc, 0x80, count + 1); |
343 |
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encode_str (enc, HvNAMEUTF8 (stash), HvNAME (stash), HvNAMELEN (stash)); |
344 |
root |
1.6 |
|
345 |
root |
1.11 |
while (count) |
346 |
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encode_sv (enc, SP[1 - count--]); |
347 |
root |
1.6 |
|
348 |
root |
1.11 |
PUTBACK; |
349 |
root |
1.6 |
|
350 |
root |
1.11 |
FREETMPS; LEAVE; |
351 |
root |
1.1 |
} |
352 |
root |
1.11 |
else |
353 |
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croak ("encountered object '%s', but no TO_CBOR or FREEZE methods available on it", |
354 |
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SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
355 |
root |
1.1 |
} |
356 |
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else if (svt == SVt_PVHV) |
357 |
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encode_hv (enc, (HV *)sv); |
358 |
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else if (svt == SVt_PVAV) |
359 |
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encode_av (enc, (AV *)sv); |
360 |
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else if (svt < SVt_PVAV) |
361 |
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{ |
362 |
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STRLEN len = 0; |
363 |
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char *pv = svt ? SvPV (sv, len) : 0; |
364 |
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365 |
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if (len == 1 && *pv == '1') |
366 |
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encode_ch (enc, 0xe0 | 21); |
367 |
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else if (len == 1 && *pv == '0') |
368 |
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encode_ch (enc, 0xe0 | 20); |
369 |
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else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
370 |
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encode_ch (enc, 0xe0 | 23); |
371 |
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else |
372 |
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croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", |
373 |
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SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
374 |
|
|
} |
375 |
|
|
else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
376 |
|
|
encode_ch (enc, 0xe0 | 23); |
377 |
|
|
else |
378 |
|
|
croak ("encountered %s, but CBOR can only represent references to arrays or hashes", |
379 |
|
|
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
380 |
|
|
} |
381 |
|
|
|
382 |
|
|
static void |
383 |
|
|
encode_nv (enc_t *enc, SV *sv) |
384 |
|
|
{ |
385 |
|
|
double nv = SvNVX (sv); |
386 |
|
|
|
387 |
|
|
need (enc, 9); |
388 |
|
|
|
389 |
root |
1.5 |
if (ecb_expect_false (nv == (U32)nv)) |
390 |
root |
1.1 |
encode_uint (enc, 0x00, (U32)nv); |
391 |
|
|
//TODO: maybe I32? |
392 |
root |
1.5 |
else if (ecb_expect_false (nv == (float)nv)) |
393 |
root |
1.1 |
{ |
394 |
|
|
uint32_t fp = ecb_float_to_binary32 (nv); |
395 |
|
|
|
396 |
|
|
*enc->cur++ = 0xe0 | 26; |
397 |
|
|
|
398 |
|
|
if (!ecb_big_endian ()) |
399 |
|
|
fp = ecb_bswap32 (fp); |
400 |
|
|
|
401 |
|
|
memcpy (enc->cur, &fp, 4); |
402 |
|
|
enc->cur += 4; |
403 |
|
|
} |
404 |
|
|
else |
405 |
|
|
{ |
406 |
|
|
uint64_t fp = ecb_double_to_binary64 (nv); |
407 |
|
|
|
408 |
|
|
*enc->cur++ = 0xe0 | 27; |
409 |
|
|
|
410 |
|
|
if (!ecb_big_endian ()) |
411 |
|
|
fp = ecb_bswap64 (fp); |
412 |
|
|
|
413 |
|
|
memcpy (enc->cur, &fp, 8); |
414 |
|
|
enc->cur += 8; |
415 |
|
|
} |
416 |
|
|
} |
417 |
|
|
|
418 |
|
|
static void |
419 |
|
|
encode_sv (enc_t *enc, SV *sv) |
420 |
|
|
{ |
421 |
|
|
SvGETMAGIC (sv); |
422 |
|
|
|
423 |
|
|
if (SvPOKp (sv)) |
424 |
|
|
{ |
425 |
|
|
STRLEN len; |
426 |
|
|
char *str = SvPV (sv, len); |
427 |
|
|
encode_str (enc, SvUTF8 (sv), str, len); |
428 |
|
|
} |
429 |
|
|
else if (SvNOKp (sv)) |
430 |
|
|
encode_nv (enc, sv); |
431 |
|
|
else if (SvIOKp (sv)) |
432 |
|
|
{ |
433 |
|
|
if (SvIsUV (sv)) |
434 |
|
|
encode_uint (enc, 0x00, SvUVX (sv)); |
435 |
|
|
else if (SvIVX (sv) >= 0) |
436 |
|
|
encode_uint (enc, 0x00, SvIVX (sv)); |
437 |
|
|
else |
438 |
|
|
encode_uint (enc, 0x20, -(SvIVX (sv) + 1)); |
439 |
|
|
} |
440 |
|
|
else if (SvROK (sv)) |
441 |
|
|
encode_rv (enc, SvRV (sv)); |
442 |
|
|
else if (!SvOK (sv)) |
443 |
|
|
encode_ch (enc, 0xe0 | 22); |
444 |
|
|
else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
445 |
|
|
encode_ch (enc, 0xe0 | 23); |
446 |
|
|
else |
447 |
|
|
croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data", |
448 |
|
|
SvPV_nolen (sv), (unsigned int)SvFLAGS (sv)); |
449 |
|
|
} |
450 |
|
|
|
451 |
|
|
static SV * |
452 |
|
|
encode_cbor (SV *scalar, CBOR *cbor) |
453 |
|
|
{ |
454 |
|
|
enc_t enc; |
455 |
|
|
|
456 |
|
|
enc.cbor = *cbor; |
457 |
|
|
enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
458 |
|
|
enc.cur = SvPVX (enc.sv); |
459 |
|
|
enc.end = SvEND (enc.sv); |
460 |
|
|
enc.depth = 0; |
461 |
|
|
|
462 |
|
|
SvPOK_only (enc.sv); |
463 |
|
|
encode_sv (&enc, scalar); |
464 |
|
|
|
465 |
|
|
SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
466 |
|
|
*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
467 |
|
|
|
468 |
|
|
if (enc.cbor.flags & F_SHRINK) |
469 |
|
|
shrink (enc.sv); |
470 |
|
|
|
471 |
|
|
return enc.sv; |
472 |
|
|
} |
473 |
|
|
|
474 |
|
|
///////////////////////////////////////////////////////////////////////////// |
475 |
|
|
// decoder |
476 |
|
|
|
477 |
|
|
// structure used for decoding CBOR |
478 |
|
|
typedef struct |
479 |
|
|
{ |
480 |
|
|
U8 *cur; // current parser pointer |
481 |
|
|
U8 *end; // end of input string |
482 |
|
|
const char *err; // parse error, if != 0 |
483 |
|
|
CBOR cbor; |
484 |
|
|
U32 depth; // recursion depth |
485 |
|
|
U32 maxdepth; // recursion depth limit |
486 |
|
|
} dec_t; |
487 |
|
|
|
488 |
|
|
#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE |
489 |
|
|
|
490 |
root |
1.5 |
#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data") |
491 |
root |
1.1 |
|
492 |
|
|
#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED) |
493 |
|
|
#define DEC_DEC_DEPTH --dec->depth |
494 |
|
|
|
495 |
|
|
static UV |
496 |
|
|
decode_uint (dec_t *dec) |
497 |
|
|
{ |
498 |
|
|
switch (*dec->cur & 31) |
499 |
|
|
{ |
500 |
|
|
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: |
501 |
|
|
case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15: |
502 |
|
|
case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23: |
503 |
|
|
return *dec->cur++ & 31; |
504 |
|
|
|
505 |
|
|
case 24: |
506 |
|
|
WANT (2); |
507 |
|
|
dec->cur += 2; |
508 |
|
|
return dec->cur[-1]; |
509 |
|
|
|
510 |
|
|
case 25: |
511 |
|
|
WANT (3); |
512 |
|
|
dec->cur += 3; |
513 |
|
|
return (((UV)dec->cur[-2]) << 8) |
514 |
|
|
| ((UV)dec->cur[-1]); |
515 |
|
|
|
516 |
|
|
case 26: |
517 |
|
|
WANT (5); |
518 |
|
|
dec->cur += 5; |
519 |
|
|
return (((UV)dec->cur[-4]) << 24) |
520 |
|
|
| (((UV)dec->cur[-3]) << 16) |
521 |
|
|
| (((UV)dec->cur[-2]) << 8) |
522 |
|
|
| ((UV)dec->cur[-1]); |
523 |
|
|
|
524 |
|
|
case 27: |
525 |
|
|
WANT (9); |
526 |
|
|
dec->cur += 9; |
527 |
|
|
return (((UV)dec->cur[-8]) << 56) |
528 |
|
|
| (((UV)dec->cur[-7]) << 48) |
529 |
|
|
| (((UV)dec->cur[-6]) << 40) |
530 |
|
|
| (((UV)dec->cur[-5]) << 32) |
531 |
|
|
| (((UV)dec->cur[-4]) << 24) |
532 |
|
|
| (((UV)dec->cur[-3]) << 16) |
533 |
|
|
| (((UV)dec->cur[-2]) << 8) |
534 |
|
|
| ((UV)dec->cur[-1]); |
535 |
|
|
|
536 |
|
|
default: |
537 |
|
|
ERR ("corrupted CBOR data (unsupported integer minor encoding)"); |
538 |
|
|
} |
539 |
|
|
|
540 |
|
|
fail: |
541 |
|
|
return 0; |
542 |
|
|
} |
543 |
|
|
|
544 |
|
|
static SV *decode_sv (dec_t *dec); |
545 |
|
|
|
546 |
|
|
static SV * |
547 |
|
|
decode_av (dec_t *dec) |
548 |
|
|
{ |
549 |
|
|
AV *av = newAV (); |
550 |
|
|
|
551 |
|
|
DEC_INC_DEPTH; |
552 |
|
|
|
553 |
|
|
if ((*dec->cur & 31) == 31) |
554 |
|
|
{ |
555 |
|
|
++dec->cur; |
556 |
|
|
|
557 |
|
|
for (;;) |
558 |
|
|
{ |
559 |
|
|
WANT (1); |
560 |
|
|
|
561 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
562 |
root |
1.1 |
{ |
563 |
|
|
++dec->cur; |
564 |
|
|
break; |
565 |
|
|
} |
566 |
|
|
|
567 |
|
|
av_push (av, decode_sv (dec)); |
568 |
|
|
} |
569 |
|
|
} |
570 |
|
|
else |
571 |
|
|
{ |
572 |
|
|
int i, len = decode_uint (dec); |
573 |
|
|
|
574 |
|
|
av_fill (av, len - 1); |
575 |
|
|
|
576 |
|
|
for (i = 0; i < len; ++i) |
577 |
|
|
AvARRAY (av)[i] = decode_sv (dec); |
578 |
|
|
} |
579 |
|
|
|
580 |
|
|
DEC_DEC_DEPTH; |
581 |
|
|
return newRV_noinc ((SV *)av); |
582 |
|
|
|
583 |
|
|
fail: |
584 |
|
|
SvREFCNT_dec (av); |
585 |
|
|
DEC_DEC_DEPTH; |
586 |
|
|
return &PL_sv_undef; |
587 |
|
|
} |
588 |
|
|
|
589 |
root |
1.16 |
static void |
590 |
|
|
decode_he (dec_t *dec, HV *hv) |
591 |
|
|
{ |
592 |
|
|
// for speed reasons, we specialcase single-string |
593 |
|
|
// byte or utf-8 strings as keys. |
594 |
|
|
|
595 |
|
|
if (*dec->cur >= 0x40 && *dec->cur <= 0x40 + 27) |
596 |
|
|
{ |
597 |
|
|
I32 len = decode_uint (dec); |
598 |
|
|
char *key = (char *)dec->cur; |
599 |
|
|
|
600 |
|
|
dec->cur += len; |
601 |
|
|
|
602 |
|
|
hv_store (hv, key, len, decode_sv (dec), 0); |
603 |
|
|
} |
604 |
|
|
else if (*dec->cur >= 0x60 && *dec->cur <= 0x60 + 27) |
605 |
|
|
{ |
606 |
|
|
I32 len = decode_uint (dec); |
607 |
|
|
char *key = (char *)dec->cur; |
608 |
|
|
|
609 |
|
|
dec->cur += len; |
610 |
|
|
|
611 |
|
|
hv_store (hv, key, -len, decode_sv (dec), 0); |
612 |
|
|
} |
613 |
|
|
else |
614 |
|
|
{ |
615 |
|
|
SV *k = decode_sv (dec); |
616 |
|
|
SV *v = decode_sv (dec); |
617 |
|
|
|
618 |
|
|
hv_store_ent (hv, k, v, 0); |
619 |
|
|
SvREFCNT_dec (k); |
620 |
|
|
} |
621 |
|
|
} |
622 |
|
|
|
623 |
root |
1.1 |
static SV * |
624 |
|
|
decode_hv (dec_t *dec) |
625 |
|
|
{ |
626 |
|
|
HV *hv = newHV (); |
627 |
|
|
|
628 |
|
|
DEC_INC_DEPTH; |
629 |
|
|
|
630 |
|
|
if ((*dec->cur & 31) == 31) |
631 |
|
|
{ |
632 |
|
|
++dec->cur; |
633 |
|
|
|
634 |
|
|
for (;;) |
635 |
|
|
{ |
636 |
|
|
WANT (1); |
637 |
|
|
|
638 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
639 |
root |
1.1 |
{ |
640 |
|
|
++dec->cur; |
641 |
|
|
break; |
642 |
|
|
} |
643 |
|
|
|
644 |
root |
1.16 |
decode_he (dec, hv); |
645 |
root |
1.1 |
} |
646 |
|
|
} |
647 |
|
|
else |
648 |
|
|
{ |
649 |
root |
1.16 |
int pairs = decode_uint (dec); |
650 |
root |
1.1 |
|
651 |
root |
1.16 |
while (pairs--) |
652 |
|
|
decode_he (dec, hv); |
653 |
root |
1.1 |
} |
654 |
|
|
|
655 |
|
|
DEC_DEC_DEPTH; |
656 |
|
|
return newRV_noinc ((SV *)hv); |
657 |
|
|
|
658 |
|
|
fail: |
659 |
|
|
SvREFCNT_dec (hv); |
660 |
|
|
DEC_DEC_DEPTH; |
661 |
|
|
return &PL_sv_undef; |
662 |
|
|
} |
663 |
|
|
|
664 |
|
|
static SV * |
665 |
|
|
decode_str (dec_t *dec, int utf8) |
666 |
|
|
{ |
667 |
root |
1.6 |
SV *sv = 0; |
668 |
root |
1.1 |
|
669 |
|
|
if ((*dec->cur & 31) == 31) |
670 |
|
|
{ |
671 |
|
|
++dec->cur; |
672 |
|
|
|
673 |
|
|
sv = newSVpvn ("", 0); |
674 |
|
|
|
675 |
|
|
// not very fast, and certainly not robust against illegal input |
676 |
|
|
for (;;) |
677 |
|
|
{ |
678 |
|
|
WANT (1); |
679 |
|
|
|
680 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
681 |
root |
1.1 |
{ |
682 |
|
|
++dec->cur; |
683 |
|
|
break; |
684 |
|
|
} |
685 |
|
|
|
686 |
root |
1.6 |
sv_catsv (sv, decode_sv (dec)); |
687 |
root |
1.1 |
} |
688 |
|
|
} |
689 |
|
|
else |
690 |
|
|
{ |
691 |
|
|
STRLEN len = decode_uint (dec); |
692 |
|
|
|
693 |
|
|
WANT (len); |
694 |
|
|
sv = newSVpvn (dec->cur, len); |
695 |
|
|
dec->cur += len; |
696 |
|
|
} |
697 |
|
|
|
698 |
|
|
if (utf8) |
699 |
|
|
SvUTF8_on (sv); |
700 |
|
|
|
701 |
|
|
return sv; |
702 |
|
|
|
703 |
|
|
fail: |
704 |
root |
1.6 |
SvREFCNT_dec (sv); |
705 |
root |
1.1 |
return &PL_sv_undef; |
706 |
|
|
} |
707 |
|
|
|
708 |
|
|
static SV * |
709 |
root |
1.3 |
decode_tagged (dec_t *dec) |
710 |
|
|
{ |
711 |
|
|
UV tag = decode_uint (dec); |
712 |
|
|
SV *sv = decode_sv (dec); |
713 |
|
|
|
714 |
root |
1.9 |
if (tag == CBOR_TAG_MAGIC) |
715 |
root |
1.3 |
return sv; |
716 |
root |
1.11 |
else if (tag == CBOR_TAG_PERL_OBJECT) |
717 |
root |
1.9 |
{ |
718 |
|
|
if (!SvROK (sv) || SvTYPE (SvRV (sv)) != SVt_PVAV) |
719 |
|
|
ERR ("corrupted CBOR data (non-array perl object)"); |
720 |
root |
1.11 |
|
721 |
|
|
AV *av = (AV *)SvRV (sv); |
722 |
|
|
int len = av_len (av) + 1; |
723 |
|
|
HV *stash = gv_stashsv (*av_fetch (av, 0, 1), 0); |
724 |
|
|
|
725 |
|
|
if (!stash) |
726 |
|
|
ERR ("cannot decode perl-object (package does not exist)"); |
727 |
|
|
|
728 |
|
|
GV *method = gv_fetchmethod_autoload (stash, "THAW", 0); |
729 |
root |
1.9 |
|
730 |
root |
1.11 |
if (!method) |
731 |
|
|
ERR ("cannot decode perl-object (package does not have a THAW method)"); |
732 |
|
|
|
733 |
|
|
dSP; |
734 |
|
|
|
735 |
|
|
ENTER; SAVETMPS; PUSHMARK (SP); |
736 |
|
|
EXTEND (SP, len + 1); |
737 |
|
|
// we re-bless the reference to get overload and other niceties right |
738 |
|
|
PUSHs (*av_fetch (av, 0, 1)); |
739 |
|
|
PUSHs (sv_cbor); |
740 |
|
|
|
741 |
|
|
int i; |
742 |
|
|
|
743 |
|
|
for (i = 1; i < len; ++i) |
744 |
|
|
PUSHs (*av_fetch (av, i, 1)); |
745 |
|
|
|
746 |
|
|
PUTBACK; |
747 |
|
|
call_sv ((SV *)GvCV (method), G_SCALAR); |
748 |
|
|
SPAGAIN; |
749 |
|
|
|
750 |
root |
1.13 |
SvREFCNT_dec (sv); |
751 |
root |
1.11 |
sv = SvREFCNT_inc (POPs); |
752 |
|
|
|
753 |
|
|
PUTBACK; |
754 |
|
|
|
755 |
|
|
FREETMPS; LEAVE; |
756 |
|
|
|
757 |
|
|
return sv; |
758 |
root |
1.9 |
} |
759 |
root |
1.11 |
else |
760 |
|
|
{ |
761 |
|
|
AV *av = newAV (); |
762 |
|
|
av_push (av, newSVuv (tag)); |
763 |
|
|
av_push (av, sv); |
764 |
root |
1.9 |
|
765 |
root |
1.11 |
HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash |
766 |
|
|
? cbor_tagged_stash |
767 |
|
|
: gv_stashpv ("CBOR::XS::Tagged" , 1); |
768 |
root |
1.7 |
|
769 |
root |
1.11 |
return sv_bless (newRV_noinc ((SV *)av), tagged_stash); |
770 |
|
|
} |
771 |
root |
1.9 |
|
772 |
|
|
fail: |
773 |
|
|
SvREFCNT_dec (sv); |
774 |
|
|
return &PL_sv_undef; |
775 |
root |
1.3 |
} |
776 |
|
|
|
777 |
|
|
static SV * |
778 |
root |
1.1 |
decode_sv (dec_t *dec) |
779 |
|
|
{ |
780 |
|
|
WANT (1); |
781 |
|
|
|
782 |
|
|
switch (*dec->cur >> 5) |
783 |
|
|
{ |
784 |
|
|
case 0: // unsigned int |
785 |
|
|
return newSVuv (decode_uint (dec)); |
786 |
|
|
case 1: // negative int |
787 |
|
|
return newSViv (-1 - (IV)decode_uint (dec)); |
788 |
|
|
case 2: // octet string |
789 |
|
|
return decode_str (dec, 0); |
790 |
|
|
case 3: // utf-8 string |
791 |
|
|
return decode_str (dec, 1); |
792 |
|
|
case 4: // array |
793 |
|
|
return decode_av (dec); |
794 |
|
|
case 5: // map |
795 |
|
|
return decode_hv (dec); |
796 |
|
|
case 6: // tag |
797 |
root |
1.3 |
return decode_tagged (dec); |
798 |
root |
1.1 |
case 7: // misc |
799 |
|
|
switch (*dec->cur++ & 31) |
800 |
|
|
{ |
801 |
|
|
case 20: |
802 |
|
|
#if CBOR_SLOW |
803 |
root |
1.10 |
types_false = get_bool ("Types::Serialiser::false"); |
804 |
root |
1.1 |
#endif |
805 |
root |
1.10 |
return newSVsv (types_false); |
806 |
root |
1.1 |
case 21: |
807 |
|
|
#if CBOR_SLOW |
808 |
root |
1.10 |
types_true = get_bool ("Types::Serialiser::true"); |
809 |
root |
1.1 |
#endif |
810 |
root |
1.10 |
return newSVsv (types_true); |
811 |
root |
1.1 |
case 22: |
812 |
|
|
return newSVsv (&PL_sv_undef); |
813 |
root |
1.10 |
case 23: |
814 |
|
|
#if CBOR_SLOW |
815 |
|
|
types_error = get_bool ("Types::Serialiser::error"); |
816 |
|
|
#endif |
817 |
|
|
return newSVsv (types_error); |
818 |
root |
1.1 |
|
819 |
|
|
case 25: |
820 |
root |
1.2 |
{ |
821 |
|
|
WANT (2); |
822 |
|
|
|
823 |
|
|
uint16_t fp = (dec->cur[0] << 8) | dec->cur[1]; |
824 |
|
|
dec->cur += 2; |
825 |
|
|
|
826 |
|
|
return newSVnv (ecb_binary16_to_float (fp)); |
827 |
|
|
} |
828 |
root |
1.1 |
|
829 |
|
|
case 26: |
830 |
|
|
{ |
831 |
|
|
uint32_t fp; |
832 |
|
|
WANT (4); |
833 |
|
|
memcpy (&fp, dec->cur, 4); |
834 |
|
|
dec->cur += 4; |
835 |
|
|
|
836 |
|
|
if (!ecb_big_endian ()) |
837 |
|
|
fp = ecb_bswap32 (fp); |
838 |
|
|
|
839 |
|
|
return newSVnv (ecb_binary32_to_float (fp)); |
840 |
|
|
} |
841 |
|
|
|
842 |
|
|
case 27: |
843 |
|
|
{ |
844 |
|
|
uint64_t fp; |
845 |
|
|
WANT (8); |
846 |
|
|
memcpy (&fp, dec->cur, 8); |
847 |
|
|
dec->cur += 8; |
848 |
|
|
|
849 |
|
|
if (!ecb_big_endian ()) |
850 |
|
|
fp = ecb_bswap64 (fp); |
851 |
|
|
|
852 |
|
|
return newSVnv (ecb_binary64_to_double (fp)); |
853 |
|
|
} |
854 |
|
|
|
855 |
|
|
// 0..19 unassigned |
856 |
|
|
// 24 reserved + unassigned (reserved values are not encodable) |
857 |
|
|
default: |
858 |
|
|
ERR ("corrupted CBOR data (reserved/unassigned major 7 value)"); |
859 |
|
|
} |
860 |
|
|
|
861 |
|
|
break; |
862 |
|
|
} |
863 |
|
|
|
864 |
|
|
fail: |
865 |
|
|
return &PL_sv_undef; |
866 |
|
|
} |
867 |
|
|
|
868 |
|
|
static SV * |
869 |
|
|
decode_cbor (SV *string, CBOR *cbor, char **offset_return) |
870 |
|
|
{ |
871 |
|
|
dec_t dec; |
872 |
|
|
SV *sv; |
873 |
root |
1.16 |
STRLEN len; |
874 |
|
|
char *data = SvPVbyte (string, len); |
875 |
root |
1.1 |
|
876 |
root |
1.16 |
if (len > cbor->max_size && cbor->max_size) |
877 |
|
|
croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu", |
878 |
|
|
(unsigned long)len, (unsigned long)cbor->max_size); |
879 |
root |
1.1 |
|
880 |
|
|
dec.cbor = *cbor; |
881 |
root |
1.16 |
dec.cur = (U8 *)data; |
882 |
|
|
dec.end = (U8 *)data + len; |
883 |
root |
1.1 |
dec.err = 0; |
884 |
|
|
dec.depth = 0; |
885 |
|
|
|
886 |
|
|
sv = decode_sv (&dec); |
887 |
|
|
|
888 |
|
|
if (offset_return) |
889 |
|
|
*offset_return = dec.cur; |
890 |
|
|
|
891 |
|
|
if (!(offset_return || !sv)) |
892 |
root |
1.2 |
if (dec.cur != dec.end && !dec.err) |
893 |
|
|
dec.err = "garbage after CBOR object"; |
894 |
|
|
|
895 |
|
|
if (dec.err) |
896 |
root |
1.1 |
{ |
897 |
root |
1.2 |
SvREFCNT_dec (sv); |
898 |
root |
1.16 |
croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)data, (int)(uint8_t)*dec.cur); |
899 |
root |
1.1 |
} |
900 |
|
|
|
901 |
|
|
sv = sv_2mortal (sv); |
902 |
|
|
|
903 |
|
|
return sv; |
904 |
|
|
} |
905 |
|
|
|
906 |
|
|
///////////////////////////////////////////////////////////////////////////// |
907 |
|
|
// XS interface functions |
908 |
|
|
|
909 |
|
|
MODULE = CBOR::XS PACKAGE = CBOR::XS |
910 |
|
|
|
911 |
|
|
BOOT: |
912 |
|
|
{ |
913 |
|
|
cbor_stash = gv_stashpv ("CBOR::XS" , 1); |
914 |
root |
1.6 |
cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1); |
915 |
root |
1.1 |
|
916 |
root |
1.10 |
types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1); |
917 |
|
|
types_error_stash = gv_stashpv ("Types::Serialiser::Error" , 1); |
918 |
|
|
|
919 |
|
|
types_true = get_bool ("Types::Serialiser::true" ); |
920 |
|
|
types_false = get_bool ("Types::Serialiser::false"); |
921 |
|
|
types_error = get_bool ("Types::Serialiser::error"); |
922 |
root |
1.11 |
|
923 |
|
|
sv_cbor = newSVpv ("CBOR", 0); |
924 |
|
|
SvREADONLY_on (sv_cbor); |
925 |
root |
1.1 |
} |
926 |
|
|
|
927 |
|
|
PROTOTYPES: DISABLE |
928 |
|
|
|
929 |
|
|
void CLONE (...) |
930 |
|
|
CODE: |
931 |
root |
1.10 |
cbor_stash = 0; |
932 |
|
|
cbor_tagged_stash = 0; |
933 |
|
|
types_error_stash = 0; |
934 |
|
|
types_boolean_stash = 0; |
935 |
root |
1.1 |
|
936 |
|
|
void new (char *klass) |
937 |
|
|
PPCODE: |
938 |
|
|
{ |
939 |
|
|
SV *pv = NEWSV (0, sizeof (CBOR)); |
940 |
|
|
SvPOK_only (pv); |
941 |
|
|
cbor_init ((CBOR *)SvPVX (pv)); |
942 |
|
|
XPUSHs (sv_2mortal (sv_bless ( |
943 |
|
|
newRV_noinc (pv), |
944 |
|
|
strEQ (klass, "CBOR::XS") ? CBOR_STASH : gv_stashpv (klass, 1) |
945 |
|
|
))); |
946 |
|
|
} |
947 |
|
|
|
948 |
|
|
void shrink (CBOR *self, int enable = 1) |
949 |
|
|
ALIAS: |
950 |
|
|
shrink = F_SHRINK |
951 |
|
|
allow_unknown = F_ALLOW_UNKNOWN |
952 |
|
|
PPCODE: |
953 |
|
|
{ |
954 |
|
|
if (enable) |
955 |
|
|
self->flags |= ix; |
956 |
|
|
else |
957 |
|
|
self->flags &= ~ix; |
958 |
|
|
|
959 |
|
|
XPUSHs (ST (0)); |
960 |
|
|
} |
961 |
|
|
|
962 |
|
|
void get_shrink (CBOR *self) |
963 |
|
|
ALIAS: |
964 |
|
|
get_shrink = F_SHRINK |
965 |
|
|
get_allow_unknown = F_ALLOW_UNKNOWN |
966 |
|
|
PPCODE: |
967 |
|
|
XPUSHs (boolSV (self->flags & ix)); |
968 |
|
|
|
969 |
|
|
void max_depth (CBOR *self, U32 max_depth = 0x80000000UL) |
970 |
|
|
PPCODE: |
971 |
|
|
self->max_depth = max_depth; |
972 |
|
|
XPUSHs (ST (0)); |
973 |
|
|
|
974 |
|
|
U32 get_max_depth (CBOR *self) |
975 |
|
|
CODE: |
976 |
|
|
RETVAL = self->max_depth; |
977 |
|
|
OUTPUT: |
978 |
|
|
RETVAL |
979 |
|
|
|
980 |
|
|
void max_size (CBOR *self, U32 max_size = 0) |
981 |
|
|
PPCODE: |
982 |
|
|
self->max_size = max_size; |
983 |
|
|
XPUSHs (ST (0)); |
984 |
|
|
|
985 |
|
|
int get_max_size (CBOR *self) |
986 |
|
|
CODE: |
987 |
|
|
RETVAL = self->max_size; |
988 |
|
|
OUTPUT: |
989 |
|
|
RETVAL |
990 |
|
|
|
991 |
|
|
void encode (CBOR *self, SV *scalar) |
992 |
|
|
PPCODE: |
993 |
|
|
PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN; |
994 |
|
|
XPUSHs (scalar); |
995 |
|
|
|
996 |
|
|
void decode (CBOR *self, SV *cborstr) |
997 |
|
|
PPCODE: |
998 |
|
|
PUTBACK; cborstr = decode_cbor (cborstr, self, 0); SPAGAIN; |
999 |
|
|
XPUSHs (cborstr); |
1000 |
|
|
|
1001 |
|
|
void decode_prefix (CBOR *self, SV *cborstr) |
1002 |
|
|
PPCODE: |
1003 |
|
|
{ |
1004 |
|
|
SV *sv; |
1005 |
|
|
char *offset; |
1006 |
|
|
PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN; |
1007 |
|
|
EXTEND (SP, 2); |
1008 |
|
|
PUSHs (sv); |
1009 |
|
|
PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr)))); |
1010 |
|
|
} |
1011 |
|
|
|
1012 |
|
|
PROTOTYPES: ENABLE |
1013 |
|
|
|
1014 |
|
|
void encode_cbor (SV *scalar) |
1015 |
|
|
PPCODE: |
1016 |
|
|
{ |
1017 |
|
|
CBOR cbor; |
1018 |
|
|
cbor_init (&cbor); |
1019 |
|
|
PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN; |
1020 |
|
|
XPUSHs (scalar); |
1021 |
|
|
} |
1022 |
|
|
|
1023 |
|
|
void decode_cbor (SV *cborstr) |
1024 |
|
|
PPCODE: |
1025 |
|
|
{ |
1026 |
|
|
CBOR cbor; |
1027 |
|
|
cbor_init (&cbor); |
1028 |
|
|
PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN; |
1029 |
|
|
XPUSHs (cborstr); |
1030 |
|
|
} |
1031 |
|
|
|