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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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#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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root |
1.6 |
static HV *cbor_stash, *cbor_boolean_stash, *cbor_tagged_stash; // CBOR::XS:: |
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root |
1.1 |
static SV *cbor_true, *cbor_false; |
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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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root |
1.5 |
ecb_inline void |
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root |
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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root |
1.5 |
ecb_inline SV * |
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root |
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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SvREADONLY_on (sv); |
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SvREADONLY_on (SvRV (sv)); |
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return sv; |
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} |
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root |
1.5 |
ecb_inline void |
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root |
1.1 |
shrink (SV *sv) |
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{ |
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sv_utf8_downgrade (sv, 1); |
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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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///////////////////////////////////////////////////////////////////////////// |
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// fp hell |
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//TODO |
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///////////////////////////////////////////////////////////////////////////// |
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// encoder |
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// structure used for encoding CBOR |
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typedef struct |
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{ |
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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 |
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CBOR cbor; |
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U32 depth; // recursion level |
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} enc_t; |
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root |
1.5 |
ecb_inline void |
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root |
1.1 |
need (enc_t *enc, STRLEN len) |
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{ |
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1.5 |
if (ecb_expect_false (enc->cur + len >= enc->end)) |
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1.1 |
{ |
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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; |
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enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
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} |
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} |
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root |
1.5 |
ecb_inline void |
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root |
1.1 |
encode_ch (enc_t *enc, char ch) |
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{ |
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need (enc, 1); |
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*enc->cur++ = ch; |
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} |
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static void |
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encode_uint (enc_t *enc, int major, UV len) |
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{ |
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need (enc, 9); |
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if (len < 24) |
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*enc->cur++ = major | len; |
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root |
1.4 |
else if (len <= 0xff) |
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root |
1.1 |
{ |
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*enc->cur++ = major | 24; |
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*enc->cur++ = len; |
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} |
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root |
1.4 |
else if (len <= 0xffff) |
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root |
1.1 |
{ |
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*enc->cur++ = major | 25; |
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*enc->cur++ = len >> 8; |
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*enc->cur++ = len; |
135 |
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} |
136 |
root |
1.4 |
else if (len <= 0xffffffff) |
137 |
root |
1.1 |
{ |
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*enc->cur++ = major | 26; |
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*enc->cur++ = len >> 24; |
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*enc->cur++ = len >> 16; |
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*enc->cur++ = len >> 8; |
142 |
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*enc->cur++ = len; |
143 |
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} |
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root |
1.4 |
else |
145 |
root |
1.1 |
{ |
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*enc->cur++ = major | 27; |
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*enc->cur++ = len >> 56; |
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*enc->cur++ = len >> 48; |
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*enc->cur++ = len >> 40; |
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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; |
154 |
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*enc->cur++ = len; |
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} |
156 |
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} |
157 |
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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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{ |
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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; |
165 |
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} |
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static void encode_sv (enc_t *enc, SV *sv); |
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static void |
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encode_av (enc_t *enc, AV *av) |
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{ |
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int i, len = av_len (av); |
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174 |
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if (enc->depth >= enc->cbor.max_depth) |
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croak (ERR_NESTING_EXCEEDED); |
176 |
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177 |
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++enc->depth; |
178 |
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179 |
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encode_uint (enc, 0x80, len + 1); |
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for (i = 0; i <= len; ++i) |
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{ |
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SV **svp = av_fetch (av, i, 0); |
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encode_sv (enc, svp ? *svp : &PL_sv_undef); |
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} |
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--enc->depth; |
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} |
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static void |
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encode_hv (enc_t *enc, HV *hv) |
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{ |
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HE *he; |
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if (enc->depth >= enc->cbor.max_depth) |
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croak (ERR_NESTING_EXCEEDED); |
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++enc->depth; |
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200 |
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int pairs = hv_iterinit (hv); |
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int mg = SvMAGICAL (hv); |
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if (mg) |
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encode_ch (enc, 0xa0 | 31); |
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else |
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encode_uint (enc, 0xa0, pairs); |
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while ((he = hv_iternext (hv))) |
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{ |
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if (HeKLEN (he) == HEf_SVKEY) |
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encode_sv (enc, HeSVKEY (he)); |
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else |
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encode_str (enc, HeKUTF8 (he), HeKEY (he), HeKLEN (he)); |
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215 |
root |
1.5 |
encode_sv (enc, ecb_expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he)); |
216 |
root |
1.1 |
} |
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if (mg) |
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encode_ch (enc, 0xe0 | 31); |
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--enc->depth; |
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} |
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// encode objects, arrays and special \0=false and \1=true values. |
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static void |
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encode_rv (enc_t *enc, SV *sv) |
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{ |
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svtype svt; |
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SvGETMAGIC (sv); |
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svt = SvTYPE (sv); |
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233 |
root |
1.5 |
if (ecb_expect_false (SvOBJECT (sv))) |
234 |
root |
1.1 |
{ |
235 |
root |
1.6 |
HV *boolean_stash = !CBOR_SLOW || cbor_boolean_stash |
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? cbor_boolean_stash |
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: gv_stashpv ("CBOR::XS::Boolean", 1); |
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HV *tagged_stash = !CBOR_SLOW || cbor_tagged_stash |
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? cbor_tagged_stash |
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: gv_stashpv ("CBOR::XS::Tagged" , 1); |
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root |
1.1 |
|
242 |
root |
1.6 |
if (SvSTASH (sv) == boolean_stash) |
243 |
root |
1.1 |
encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20); |
244 |
root |
1.6 |
else if (SvSTASH (sv) == tagged_stash) |
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{ |
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if (svt != SVt_PVAV) |
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croak ("encountered CBOR::XS::Tagged object that isn't an array"); |
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249 |
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encode_uint (enc, 0xc0, SvUV (*av_fetch ((AV *)sv, 0, 1))); |
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encode_sv (enc, *av_fetch ((AV *)sv, 1, 1)); |
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} |
252 |
root |
1.1 |
else |
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{ |
254 |
root |
1.6 |
// we re-bless the reference to get overload and other niceties right |
255 |
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GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0); |
256 |
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257 |
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if (to_cbor) |
258 |
root |
1.1 |
{ |
259 |
root |
1.6 |
dSP; |
260 |
root |
1.1 |
|
261 |
root |
1.6 |
ENTER; SAVETMPS; PUSHMARK (SP); |
262 |
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XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv))); |
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264 |
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// calling with G_SCALAR ensures that we always get a 1 return value |
265 |
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PUTBACK; |
266 |
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call_sv ((SV *)GvCV (to_cbor), G_SCALAR); |
267 |
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SPAGAIN; |
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269 |
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// catch this surprisingly common error |
270 |
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if (SvROK (TOPs) && SvRV (TOPs) == sv) |
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croak ("%s::TO_CBOR method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv))); |
272 |
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273 |
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sv = POPs; |
274 |
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PUTBACK; |
275 |
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276 |
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encode_sv (enc, sv); |
277 |
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278 |
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FREETMPS; LEAVE; |
279 |
root |
1.1 |
} |
280 |
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else |
281 |
root |
1.6 |
croak ("encountered object '%s', but no TO_CBOR method available on it", |
282 |
root |
1.1 |
SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
283 |
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} |
284 |
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} |
285 |
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else if (svt == SVt_PVHV) |
286 |
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encode_hv (enc, (HV *)sv); |
287 |
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else if (svt == SVt_PVAV) |
288 |
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encode_av (enc, (AV *)sv); |
289 |
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else if (svt < SVt_PVAV) |
290 |
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{ |
291 |
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STRLEN len = 0; |
292 |
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char *pv = svt ? SvPV (sv, len) : 0; |
293 |
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294 |
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if (len == 1 && *pv == '1') |
295 |
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encode_ch (enc, 0xe0 | 21); |
296 |
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else if (len == 1 && *pv == '0') |
297 |
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encode_ch (enc, 0xe0 | 20); |
298 |
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else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
299 |
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encode_ch (enc, 0xe0 | 23); |
300 |
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else |
301 |
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croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", |
302 |
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SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
303 |
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} |
304 |
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else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
305 |
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encode_ch (enc, 0xe0 | 23); |
306 |
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else |
307 |
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croak ("encountered %s, but CBOR can only represent references to arrays or hashes", |
308 |
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SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
309 |
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} |
310 |
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311 |
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static void |
312 |
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encode_nv (enc_t *enc, SV *sv) |
313 |
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{ |
314 |
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double nv = SvNVX (sv); |
315 |
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316 |
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need (enc, 9); |
317 |
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318 |
root |
1.5 |
if (ecb_expect_false (nv == (U32)nv)) |
319 |
root |
1.1 |
encode_uint (enc, 0x00, (U32)nv); |
320 |
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//TODO: maybe I32? |
321 |
root |
1.5 |
else if (ecb_expect_false (nv == (float)nv)) |
322 |
root |
1.1 |
{ |
323 |
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uint32_t fp = ecb_float_to_binary32 (nv); |
324 |
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325 |
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*enc->cur++ = 0xe0 | 26; |
326 |
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327 |
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if (!ecb_big_endian ()) |
328 |
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fp = ecb_bswap32 (fp); |
329 |
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330 |
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memcpy (enc->cur, &fp, 4); |
331 |
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enc->cur += 4; |
332 |
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} |
333 |
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else |
334 |
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{ |
335 |
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uint64_t fp = ecb_double_to_binary64 (nv); |
336 |
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337 |
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*enc->cur++ = 0xe0 | 27; |
338 |
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339 |
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if (!ecb_big_endian ()) |
340 |
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fp = ecb_bswap64 (fp); |
341 |
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342 |
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memcpy (enc->cur, &fp, 8); |
343 |
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enc->cur += 8; |
344 |
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} |
345 |
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} |
346 |
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347 |
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static void |
348 |
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encode_sv (enc_t *enc, SV *sv) |
349 |
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{ |
350 |
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SvGETMAGIC (sv); |
351 |
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352 |
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if (SvPOKp (sv)) |
353 |
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{ |
354 |
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STRLEN len; |
355 |
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char *str = SvPV (sv, len); |
356 |
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encode_str (enc, SvUTF8 (sv), str, len); |
357 |
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} |
358 |
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else if (SvNOKp (sv)) |
359 |
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encode_nv (enc, sv); |
360 |
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else if (SvIOKp (sv)) |
361 |
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{ |
362 |
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if (SvIsUV (sv)) |
363 |
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encode_uint (enc, 0x00, SvUVX (sv)); |
364 |
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else if (SvIVX (sv) >= 0) |
365 |
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encode_uint (enc, 0x00, SvIVX (sv)); |
366 |
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else |
367 |
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encode_uint (enc, 0x20, -(SvIVX (sv) + 1)); |
368 |
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} |
369 |
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else if (SvROK (sv)) |
370 |
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encode_rv (enc, SvRV (sv)); |
371 |
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else if (!SvOK (sv)) |
372 |
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encode_ch (enc, 0xe0 | 22); |
373 |
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else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
374 |
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encode_ch (enc, 0xe0 | 23); |
375 |
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else |
376 |
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croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data", |
377 |
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SvPV_nolen (sv), (unsigned int)SvFLAGS (sv)); |
378 |
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} |
379 |
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380 |
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static SV * |
381 |
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encode_cbor (SV *scalar, CBOR *cbor) |
382 |
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{ |
383 |
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enc_t enc; |
384 |
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385 |
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enc.cbor = *cbor; |
386 |
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enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
387 |
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enc.cur = SvPVX (enc.sv); |
388 |
|
|
enc.end = SvEND (enc.sv); |
389 |
|
|
enc.depth = 0; |
390 |
|
|
|
391 |
|
|
SvPOK_only (enc.sv); |
392 |
|
|
encode_sv (&enc, scalar); |
393 |
|
|
|
394 |
|
|
SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
395 |
|
|
*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
396 |
|
|
|
397 |
|
|
if (enc.cbor.flags & F_SHRINK) |
398 |
|
|
shrink (enc.sv); |
399 |
|
|
|
400 |
|
|
return enc.sv; |
401 |
|
|
} |
402 |
|
|
|
403 |
|
|
///////////////////////////////////////////////////////////////////////////// |
404 |
|
|
// decoder |
405 |
|
|
|
406 |
|
|
// structure used for decoding CBOR |
407 |
|
|
typedef struct |
408 |
|
|
{ |
409 |
|
|
U8 *cur; // current parser pointer |
410 |
|
|
U8 *end; // end of input string |
411 |
|
|
const char *err; // parse error, if != 0 |
412 |
|
|
CBOR cbor; |
413 |
|
|
U32 depth; // recursion depth |
414 |
|
|
U32 maxdepth; // recursion depth limit |
415 |
|
|
} dec_t; |
416 |
|
|
|
417 |
|
|
#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE |
418 |
|
|
|
419 |
root |
1.5 |
#define WANT(len) if (ecb_expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data") |
420 |
root |
1.1 |
|
421 |
|
|
#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED) |
422 |
|
|
#define DEC_DEC_DEPTH --dec->depth |
423 |
|
|
|
424 |
|
|
static UV |
425 |
|
|
decode_uint (dec_t *dec) |
426 |
|
|
{ |
427 |
|
|
switch (*dec->cur & 31) |
428 |
|
|
{ |
429 |
|
|
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: |
430 |
|
|
case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15: |
431 |
|
|
case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23: |
432 |
|
|
return *dec->cur++ & 31; |
433 |
|
|
|
434 |
|
|
case 24: |
435 |
|
|
WANT (2); |
436 |
|
|
dec->cur += 2; |
437 |
|
|
return dec->cur[-1]; |
438 |
|
|
|
439 |
|
|
case 25: |
440 |
|
|
WANT (3); |
441 |
|
|
dec->cur += 3; |
442 |
|
|
return (((UV)dec->cur[-2]) << 8) |
443 |
|
|
| ((UV)dec->cur[-1]); |
444 |
|
|
|
445 |
|
|
case 26: |
446 |
|
|
WANT (5); |
447 |
|
|
dec->cur += 5; |
448 |
|
|
return (((UV)dec->cur[-4]) << 24) |
449 |
|
|
| (((UV)dec->cur[-3]) << 16) |
450 |
|
|
| (((UV)dec->cur[-2]) << 8) |
451 |
|
|
| ((UV)dec->cur[-1]); |
452 |
|
|
|
453 |
|
|
case 27: |
454 |
|
|
WANT (9); |
455 |
|
|
dec->cur += 9; |
456 |
|
|
return (((UV)dec->cur[-8]) << 56) |
457 |
|
|
| (((UV)dec->cur[-7]) << 48) |
458 |
|
|
| (((UV)dec->cur[-6]) << 40) |
459 |
|
|
| (((UV)dec->cur[-5]) << 32) |
460 |
|
|
| (((UV)dec->cur[-4]) << 24) |
461 |
|
|
| (((UV)dec->cur[-3]) << 16) |
462 |
|
|
| (((UV)dec->cur[-2]) << 8) |
463 |
|
|
| ((UV)dec->cur[-1]); |
464 |
|
|
|
465 |
|
|
default: |
466 |
|
|
ERR ("corrupted CBOR data (unsupported integer minor encoding)"); |
467 |
|
|
} |
468 |
|
|
|
469 |
|
|
fail: |
470 |
|
|
return 0; |
471 |
|
|
} |
472 |
|
|
|
473 |
|
|
static SV *decode_sv (dec_t *dec); |
474 |
|
|
|
475 |
|
|
static SV * |
476 |
|
|
decode_av (dec_t *dec) |
477 |
|
|
{ |
478 |
|
|
AV *av = newAV (); |
479 |
|
|
|
480 |
|
|
DEC_INC_DEPTH; |
481 |
|
|
|
482 |
|
|
if ((*dec->cur & 31) == 31) |
483 |
|
|
{ |
484 |
|
|
++dec->cur; |
485 |
|
|
|
486 |
|
|
for (;;) |
487 |
|
|
{ |
488 |
|
|
WANT (1); |
489 |
|
|
|
490 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
491 |
root |
1.1 |
{ |
492 |
|
|
++dec->cur; |
493 |
|
|
break; |
494 |
|
|
} |
495 |
|
|
|
496 |
|
|
av_push (av, decode_sv (dec)); |
497 |
|
|
} |
498 |
|
|
} |
499 |
|
|
else |
500 |
|
|
{ |
501 |
|
|
int i, len = decode_uint (dec); |
502 |
|
|
|
503 |
|
|
av_fill (av, len - 1); |
504 |
|
|
|
505 |
|
|
for (i = 0; i < len; ++i) |
506 |
|
|
AvARRAY (av)[i] = decode_sv (dec); |
507 |
|
|
} |
508 |
|
|
|
509 |
|
|
DEC_DEC_DEPTH; |
510 |
|
|
return newRV_noinc ((SV *)av); |
511 |
|
|
|
512 |
|
|
fail: |
513 |
|
|
SvREFCNT_dec (av); |
514 |
|
|
DEC_DEC_DEPTH; |
515 |
|
|
return &PL_sv_undef; |
516 |
|
|
} |
517 |
|
|
|
518 |
|
|
static SV * |
519 |
|
|
decode_hv (dec_t *dec) |
520 |
|
|
{ |
521 |
|
|
HV *hv = newHV (); |
522 |
|
|
|
523 |
|
|
DEC_INC_DEPTH; |
524 |
|
|
|
525 |
|
|
if ((*dec->cur & 31) == 31) |
526 |
|
|
{ |
527 |
|
|
++dec->cur; |
528 |
|
|
|
529 |
|
|
for (;;) |
530 |
|
|
{ |
531 |
|
|
WANT (1); |
532 |
|
|
|
533 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
534 |
root |
1.1 |
{ |
535 |
|
|
++dec->cur; |
536 |
|
|
break; |
537 |
|
|
} |
538 |
|
|
|
539 |
|
|
SV *k = decode_sv (dec); |
540 |
|
|
SV *v = decode_sv (dec); |
541 |
|
|
|
542 |
|
|
hv_store_ent (hv, k, v, 0); |
543 |
|
|
} |
544 |
|
|
} |
545 |
|
|
else |
546 |
|
|
{ |
547 |
|
|
int len = decode_uint (dec); |
548 |
|
|
|
549 |
|
|
while (len--) |
550 |
|
|
{ |
551 |
|
|
SV *k = decode_sv (dec); |
552 |
|
|
SV *v = decode_sv (dec); |
553 |
|
|
|
554 |
|
|
hv_store_ent (hv, k, v, 0); |
555 |
|
|
} |
556 |
|
|
} |
557 |
|
|
|
558 |
|
|
DEC_DEC_DEPTH; |
559 |
|
|
return newRV_noinc ((SV *)hv); |
560 |
|
|
|
561 |
|
|
fail: |
562 |
|
|
SvREFCNT_dec (hv); |
563 |
|
|
DEC_DEC_DEPTH; |
564 |
|
|
return &PL_sv_undef; |
565 |
|
|
} |
566 |
|
|
|
567 |
|
|
static SV * |
568 |
|
|
decode_str (dec_t *dec, int utf8) |
569 |
|
|
{ |
570 |
root |
1.6 |
SV *sv = 0; |
571 |
root |
1.1 |
|
572 |
|
|
if ((*dec->cur & 31) == 31) |
573 |
|
|
{ |
574 |
|
|
++dec->cur; |
575 |
|
|
|
576 |
|
|
sv = newSVpvn ("", 0); |
577 |
|
|
|
578 |
|
|
// not very fast, and certainly not robust against illegal input |
579 |
|
|
for (;;) |
580 |
|
|
{ |
581 |
|
|
WANT (1); |
582 |
|
|
|
583 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
584 |
root |
1.1 |
{ |
585 |
|
|
++dec->cur; |
586 |
|
|
break; |
587 |
|
|
} |
588 |
|
|
|
589 |
root |
1.6 |
sv_catsv (sv, decode_sv (dec)); |
590 |
root |
1.1 |
} |
591 |
|
|
} |
592 |
|
|
else |
593 |
|
|
{ |
594 |
|
|
STRLEN len = decode_uint (dec); |
595 |
|
|
|
596 |
|
|
WANT (len); |
597 |
|
|
sv = newSVpvn (dec->cur, len); |
598 |
|
|
dec->cur += len; |
599 |
|
|
} |
600 |
|
|
|
601 |
|
|
if (utf8) |
602 |
|
|
SvUTF8_on (sv); |
603 |
|
|
|
604 |
|
|
return sv; |
605 |
|
|
|
606 |
|
|
fail: |
607 |
root |
1.6 |
SvREFCNT_dec (sv); |
608 |
root |
1.1 |
return &PL_sv_undef; |
609 |
|
|
} |
610 |
|
|
|
611 |
|
|
static SV * |
612 |
root |
1.3 |
decode_tagged (dec_t *dec) |
613 |
|
|
{ |
614 |
|
|
UV tag = decode_uint (dec); |
615 |
|
|
SV *sv = decode_sv (dec); |
616 |
|
|
|
617 |
|
|
if (tag == 55799) // 2.4.5 Self-Describe CBOR |
618 |
|
|
return sv; |
619 |
|
|
|
620 |
|
|
AV *av = newAV (); |
621 |
|
|
av_push (av, newSVuv (tag)); |
622 |
|
|
av_push (av, sv); |
623 |
|
|
return newRV_noinc ((SV *)av); |
624 |
|
|
} |
625 |
|
|
|
626 |
|
|
static SV * |
627 |
root |
1.1 |
decode_sv (dec_t *dec) |
628 |
|
|
{ |
629 |
|
|
WANT (1); |
630 |
|
|
|
631 |
|
|
switch (*dec->cur >> 5) |
632 |
|
|
{ |
633 |
|
|
case 0: // unsigned int |
634 |
|
|
return newSVuv (decode_uint (dec)); |
635 |
|
|
case 1: // negative int |
636 |
|
|
return newSViv (-1 - (IV)decode_uint (dec)); |
637 |
|
|
case 2: // octet string |
638 |
|
|
return decode_str (dec, 0); |
639 |
|
|
case 3: // utf-8 string |
640 |
|
|
return decode_str (dec, 1); |
641 |
|
|
case 4: // array |
642 |
|
|
return decode_av (dec); |
643 |
|
|
case 5: // map |
644 |
|
|
return decode_hv (dec); |
645 |
|
|
case 6: // tag |
646 |
root |
1.3 |
return decode_tagged (dec); |
647 |
root |
1.1 |
case 7: // misc |
648 |
|
|
switch (*dec->cur++ & 31) |
649 |
|
|
{ |
650 |
|
|
case 20: |
651 |
|
|
#if CBOR_SLOW |
652 |
|
|
cbor_false = get_bool ("CBOR::XS::false"); |
653 |
|
|
#endif |
654 |
|
|
return newSVsv (cbor_false); |
655 |
|
|
case 21: |
656 |
|
|
#if CBOR_SLOW |
657 |
|
|
cbor_true = get_bool ("CBOR::XS::true"); |
658 |
|
|
#endif |
659 |
|
|
return newSVsv (cbor_true); |
660 |
|
|
case 22: |
661 |
|
|
return newSVsv (&PL_sv_undef); |
662 |
|
|
|
663 |
|
|
case 25: |
664 |
root |
1.2 |
{ |
665 |
|
|
WANT (2); |
666 |
|
|
|
667 |
|
|
uint16_t fp = (dec->cur[0] << 8) | dec->cur[1]; |
668 |
|
|
dec->cur += 2; |
669 |
|
|
|
670 |
|
|
return newSVnv (ecb_binary16_to_float (fp)); |
671 |
|
|
} |
672 |
root |
1.1 |
|
673 |
|
|
case 26: |
674 |
|
|
{ |
675 |
|
|
uint32_t fp; |
676 |
|
|
WANT (4); |
677 |
|
|
memcpy (&fp, dec->cur, 4); |
678 |
|
|
dec->cur += 4; |
679 |
|
|
|
680 |
|
|
if (!ecb_big_endian ()) |
681 |
|
|
fp = ecb_bswap32 (fp); |
682 |
|
|
|
683 |
|
|
return newSVnv (ecb_binary32_to_float (fp)); |
684 |
|
|
} |
685 |
|
|
|
686 |
|
|
case 27: |
687 |
|
|
{ |
688 |
|
|
uint64_t fp; |
689 |
|
|
WANT (8); |
690 |
|
|
memcpy (&fp, dec->cur, 8); |
691 |
|
|
dec->cur += 8; |
692 |
|
|
|
693 |
|
|
if (!ecb_big_endian ()) |
694 |
|
|
fp = ecb_bswap64 (fp); |
695 |
|
|
|
696 |
|
|
return newSVnv (ecb_binary64_to_double (fp)); |
697 |
|
|
} |
698 |
|
|
|
699 |
|
|
// 0..19 unassigned |
700 |
|
|
// 24 reserved + unassigned (reserved values are not encodable) |
701 |
|
|
default: |
702 |
|
|
ERR ("corrupted CBOR data (reserved/unassigned major 7 value)"); |
703 |
|
|
} |
704 |
|
|
|
705 |
|
|
break; |
706 |
|
|
} |
707 |
|
|
|
708 |
|
|
fail: |
709 |
|
|
return &PL_sv_undef; |
710 |
|
|
} |
711 |
|
|
|
712 |
|
|
static SV * |
713 |
|
|
decode_cbor (SV *string, CBOR *cbor, char **offset_return) |
714 |
|
|
{ |
715 |
|
|
dec_t dec; |
716 |
|
|
SV *sv; |
717 |
|
|
|
718 |
|
|
/* work around bugs in 5.10 where manipulating magic values |
719 |
|
|
* makes perl ignore the magic in subsequent accesses. |
720 |
|
|
* also make a copy of non-PV values, to get them into a clean |
721 |
|
|
* state (SvPV should do that, but it's buggy, see below). |
722 |
|
|
*/ |
723 |
|
|
/*SvGETMAGIC (string);*/ |
724 |
|
|
if (SvMAGICAL (string) || !SvPOK (string)) |
725 |
|
|
string = sv_2mortal (newSVsv (string)); |
726 |
|
|
|
727 |
|
|
SvUPGRADE (string, SVt_PV); |
728 |
|
|
|
729 |
|
|
/* work around a bug in perl 5.10, which causes SvCUR to fail an |
730 |
|
|
* assertion with -DDEBUGGING, although SvCUR is documented to |
731 |
|
|
* return the xpv_cur field which certainly exists after upgrading. |
732 |
|
|
* according to nicholas clark, calling SvPOK fixes this. |
733 |
|
|
* But it doesn't fix it, so try another workaround, call SvPV_nolen |
734 |
|
|
* and hope for the best. |
735 |
|
|
* Damnit, SvPV_nolen still trips over yet another assertion. This |
736 |
|
|
* assertion business is seriously broken, try yet another workaround |
737 |
|
|
* for the broken -DDEBUGGING. |
738 |
|
|
*/ |
739 |
|
|
{ |
740 |
|
|
#ifdef DEBUGGING |
741 |
|
|
STRLEN offset = SvOK (string) ? sv_len (string) : 0; |
742 |
|
|
#else |
743 |
|
|
STRLEN offset = SvCUR (string); |
744 |
|
|
#endif |
745 |
|
|
|
746 |
|
|
if (offset > cbor->max_size && cbor->max_size) |
747 |
|
|
croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu", |
748 |
|
|
(unsigned long)SvCUR (string), (unsigned long)cbor->max_size); |
749 |
|
|
} |
750 |
|
|
|
751 |
|
|
sv_utf8_downgrade (string, 0); |
752 |
|
|
|
753 |
|
|
dec.cbor = *cbor; |
754 |
|
|
dec.cur = (U8 *)SvPVX (string); |
755 |
|
|
dec.end = (U8 *)SvEND (string); |
756 |
|
|
dec.err = 0; |
757 |
|
|
dec.depth = 0; |
758 |
|
|
|
759 |
|
|
sv = decode_sv (&dec); |
760 |
|
|
|
761 |
|
|
if (offset_return) |
762 |
|
|
*offset_return = dec.cur; |
763 |
|
|
|
764 |
|
|
if (!(offset_return || !sv)) |
765 |
root |
1.2 |
if (dec.cur != dec.end && !dec.err) |
766 |
|
|
dec.err = "garbage after CBOR object"; |
767 |
|
|
|
768 |
|
|
if (dec.err) |
769 |
root |
1.1 |
{ |
770 |
root |
1.2 |
SvREFCNT_dec (sv); |
771 |
|
|
croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur); |
772 |
root |
1.1 |
} |
773 |
|
|
|
774 |
|
|
sv = sv_2mortal (sv); |
775 |
|
|
|
776 |
|
|
return sv; |
777 |
|
|
} |
778 |
|
|
|
779 |
|
|
///////////////////////////////////////////////////////////////////////////// |
780 |
|
|
// XS interface functions |
781 |
|
|
|
782 |
|
|
MODULE = CBOR::XS PACKAGE = CBOR::XS |
783 |
|
|
|
784 |
|
|
BOOT: |
785 |
|
|
{ |
786 |
|
|
cbor_stash = gv_stashpv ("CBOR::XS" , 1); |
787 |
|
|
cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1); |
788 |
root |
1.6 |
cbor_tagged_stash = gv_stashpv ("CBOR::XS::Tagged" , 1); |
789 |
root |
1.1 |
|
790 |
|
|
cbor_true = get_bool ("CBOR::XS::true"); |
791 |
|
|
cbor_false = get_bool ("CBOR::XS::false"); |
792 |
|
|
} |
793 |
|
|
|
794 |
|
|
PROTOTYPES: DISABLE |
795 |
|
|
|
796 |
|
|
void CLONE (...) |
797 |
|
|
CODE: |
798 |
|
|
cbor_stash = 0; |
799 |
|
|
cbor_boolean_stash = 0; |
800 |
root |
1.6 |
cbor_tagged_stash = 0; |
801 |
root |
1.1 |
|
802 |
|
|
void new (char *klass) |
803 |
|
|
PPCODE: |
804 |
|
|
{ |
805 |
|
|
SV *pv = NEWSV (0, sizeof (CBOR)); |
806 |
|
|
SvPOK_only (pv); |
807 |
|
|
cbor_init ((CBOR *)SvPVX (pv)); |
808 |
|
|
XPUSHs (sv_2mortal (sv_bless ( |
809 |
|
|
newRV_noinc (pv), |
810 |
|
|
strEQ (klass, "CBOR::XS") ? CBOR_STASH : gv_stashpv (klass, 1) |
811 |
|
|
))); |
812 |
|
|
} |
813 |
|
|
|
814 |
|
|
void shrink (CBOR *self, int enable = 1) |
815 |
|
|
ALIAS: |
816 |
|
|
shrink = F_SHRINK |
817 |
|
|
allow_unknown = F_ALLOW_UNKNOWN |
818 |
|
|
PPCODE: |
819 |
|
|
{ |
820 |
|
|
if (enable) |
821 |
|
|
self->flags |= ix; |
822 |
|
|
else |
823 |
|
|
self->flags &= ~ix; |
824 |
|
|
|
825 |
|
|
XPUSHs (ST (0)); |
826 |
|
|
} |
827 |
|
|
|
828 |
|
|
void get_shrink (CBOR *self) |
829 |
|
|
ALIAS: |
830 |
|
|
get_shrink = F_SHRINK |
831 |
|
|
get_allow_unknown = F_ALLOW_UNKNOWN |
832 |
|
|
PPCODE: |
833 |
|
|
XPUSHs (boolSV (self->flags & ix)); |
834 |
|
|
|
835 |
|
|
void max_depth (CBOR *self, U32 max_depth = 0x80000000UL) |
836 |
|
|
PPCODE: |
837 |
|
|
self->max_depth = max_depth; |
838 |
|
|
XPUSHs (ST (0)); |
839 |
|
|
|
840 |
|
|
U32 get_max_depth (CBOR *self) |
841 |
|
|
CODE: |
842 |
|
|
RETVAL = self->max_depth; |
843 |
|
|
OUTPUT: |
844 |
|
|
RETVAL |
845 |
|
|
|
846 |
|
|
void max_size (CBOR *self, U32 max_size = 0) |
847 |
|
|
PPCODE: |
848 |
|
|
self->max_size = max_size; |
849 |
|
|
XPUSHs (ST (0)); |
850 |
|
|
|
851 |
|
|
int get_max_size (CBOR *self) |
852 |
|
|
CODE: |
853 |
|
|
RETVAL = self->max_size; |
854 |
|
|
OUTPUT: |
855 |
|
|
RETVAL |
856 |
|
|
|
857 |
|
|
#if 0 //TODO |
858 |
|
|
|
859 |
|
|
void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef) |
860 |
|
|
PPCODE: |
861 |
|
|
{ |
862 |
|
|
SvREFCNT_dec (self->cb_object); |
863 |
|
|
self->cb_object = SvOK (cb) ? newSVsv (cb) : 0; |
864 |
|
|
|
865 |
|
|
XPUSHs (ST (0)); |
866 |
|
|
} |
867 |
|
|
|
868 |
|
|
void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef) |
869 |
|
|
PPCODE: |
870 |
|
|
{ |
871 |
|
|
if (!self->cb_sk_object) |
872 |
|
|
self->cb_sk_object = newHV (); |
873 |
|
|
|
874 |
|
|
if (SvOK (cb)) |
875 |
|
|
hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0); |
876 |
|
|
else |
877 |
|
|
{ |
878 |
|
|
hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0); |
879 |
|
|
|
880 |
|
|
if (!HvKEYS (self->cb_sk_object)) |
881 |
|
|
{ |
882 |
|
|
SvREFCNT_dec (self->cb_sk_object); |
883 |
|
|
self->cb_sk_object = 0; |
884 |
|
|
} |
885 |
|
|
} |
886 |
|
|
|
887 |
|
|
XPUSHs (ST (0)); |
888 |
|
|
} |
889 |
|
|
|
890 |
|
|
#endif |
891 |
|
|
|
892 |
|
|
void encode (CBOR *self, SV *scalar) |
893 |
|
|
PPCODE: |
894 |
|
|
PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN; |
895 |
|
|
XPUSHs (scalar); |
896 |
|
|
|
897 |
|
|
void decode (CBOR *self, SV *cborstr) |
898 |
|
|
PPCODE: |
899 |
|
|
PUTBACK; cborstr = decode_cbor (cborstr, self, 0); SPAGAIN; |
900 |
|
|
XPUSHs (cborstr); |
901 |
|
|
|
902 |
|
|
void decode_prefix (CBOR *self, SV *cborstr) |
903 |
|
|
PPCODE: |
904 |
|
|
{ |
905 |
|
|
SV *sv; |
906 |
|
|
char *offset; |
907 |
|
|
PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN; |
908 |
|
|
EXTEND (SP, 2); |
909 |
|
|
PUSHs (sv); |
910 |
|
|
PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr)))); |
911 |
|
|
} |
912 |
|
|
|
913 |
root |
1.6 |
#if 0 |
914 |
|
|
|
915 |
root |
1.1 |
void DESTROY (CBOR *self) |
916 |
|
|
CODE: |
917 |
|
|
SvREFCNT_dec (self->cb_sk_object); |
918 |
|
|
SvREFCNT_dec (self->cb_object); |
919 |
|
|
|
920 |
root |
1.6 |
#endif |
921 |
|
|
|
922 |
root |
1.1 |
PROTOTYPES: ENABLE |
923 |
|
|
|
924 |
|
|
void encode_cbor (SV *scalar) |
925 |
|
|
PPCODE: |
926 |
|
|
{ |
927 |
|
|
CBOR cbor; |
928 |
|
|
cbor_init (&cbor); |
929 |
|
|
PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN; |
930 |
|
|
XPUSHs (scalar); |
931 |
|
|
} |
932 |
|
|
|
933 |
|
|
void decode_cbor (SV *cborstr) |
934 |
|
|
PPCODE: |
935 |
|
|
{ |
936 |
|
|
CBOR cbor; |
937 |
|
|
cbor_init (&cbor); |
938 |
|
|
PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN; |
939 |
|
|
XPUSHs (cborstr); |
940 |
|
|
} |
941 |
|
|
|