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root |
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#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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#if defined(__BORLANDC__) || defined(_MSC_VER) |
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# define snprintf _snprintf // C compilers have this in stdio.h |
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#endif |
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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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#if __GNUC__ >= 3 |
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# define expect(expr,value) __builtin_expect ((expr), (value)) |
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# define INLINE static inline |
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#else |
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# define expect(expr,value) (expr) |
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# define INLINE static |
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#endif |
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#define expect_false(expr) expect ((expr) != 0, 0) |
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#define expect_true(expr) expect ((expr) != 0, 1) |
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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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static HV *cbor_stash, *cbor_boolean_stash; // CBOR::XS:: |
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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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SV *cb_object; |
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HV *cb_sk_object; |
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} CBOR; |
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INLINE void |
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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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INLINE SV * |
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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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INLINE void |
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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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INLINE void |
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need (enc_t *enc, STRLEN len) |
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{ |
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if (expect_false (enc->cur + len >= enc->end)) |
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{ |
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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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INLINE void |
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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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else if (len < 0x100) |
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{ |
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*enc->cur++ = major | 24; |
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*enc->cur++ = len; |
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} |
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else if (len < 0x10000) |
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{ |
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*enc->cur++ = major | 25; |
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*enc->cur++ = len >> 8; |
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*enc->cur++ = len; |
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} |
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else if (len < 0x100000000) |
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{ |
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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; |
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*enc->cur++ = len; |
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} |
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else if (len) |
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{ |
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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; |
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*enc->cur++ = len; |
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} |
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} |
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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; |
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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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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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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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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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encode_sv (enc, expect_false (mg) ? hv_iterval (hv, he) : HeVAL (he)); |
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} |
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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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if (expect_false (SvOBJECT (sv))) |
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{ |
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HV *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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257 |
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if (SvSTASH (sv) == stash) |
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encode_ch (enc, SvIV (sv) ? 0xe0 | 21 : 0xe0 | 20); |
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else |
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{ |
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#if 0 //TODO |
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if (enc->cbor.flags & F_CONV_BLESSED) |
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{ |
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// we re-bless the reference to get overload and other niceties right |
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GV *to_cbor = gv_fetchmethod_autoload (SvSTASH (sv), "TO_CBOR", 0); |
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if (to_cbor) |
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{ |
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dSP; |
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ENTER; SAVETMPS; PUSHMARK (SP); |
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XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv))); |
273 |
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274 |
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// calling with G_SCALAR ensures that we always get a 1 return value |
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PUTBACK; |
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call_sv ((SV *)GvCV (to_cbor), G_SCALAR); |
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SPAGAIN; |
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279 |
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// catch this surprisingly common error |
280 |
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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))); |
282 |
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283 |
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sv = POPs; |
284 |
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PUTBACK; |
285 |
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286 |
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encode_sv (enc, sv); |
287 |
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288 |
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FREETMPS; LEAVE; |
289 |
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} |
290 |
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else if (enc->cbor.flags & F_ALLOW_BLESSED) |
291 |
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encode_str (enc, "null", 4, 0); |
292 |
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else |
293 |
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croak ("encountered object '%s', but neither allow_blessed enabled nor TO_CBOR method available on it", |
294 |
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SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
295 |
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} |
296 |
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else if (enc->cbor.flags & F_ALLOW_BLESSED) |
297 |
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encode_str (enc, "null", 4, 0); |
298 |
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else |
299 |
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croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled", |
300 |
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SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
301 |
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#endif |
302 |
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} |
303 |
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} |
304 |
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else if (svt == SVt_PVHV) |
305 |
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encode_hv (enc, (HV *)sv); |
306 |
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else if (svt == SVt_PVAV) |
307 |
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encode_av (enc, (AV *)sv); |
308 |
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else if (svt < SVt_PVAV) |
309 |
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{ |
310 |
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STRLEN len = 0; |
311 |
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char *pv = svt ? SvPV (sv, len) : 0; |
312 |
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313 |
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if (len == 1 && *pv == '1') |
314 |
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encode_ch (enc, 0xe0 | 21); |
315 |
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else if (len == 1 && *pv == '0') |
316 |
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encode_ch (enc, 0xe0 | 20); |
317 |
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else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
318 |
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encode_ch (enc, 0xe0 | 23); |
319 |
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else |
320 |
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croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", |
321 |
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SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
322 |
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} |
323 |
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else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
324 |
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encode_ch (enc, 0xe0 | 23); |
325 |
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else |
326 |
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croak ("encountered %s, but CBOR can only represent references to arrays or hashes", |
327 |
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SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
328 |
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} |
329 |
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330 |
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static void |
331 |
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encode_nv (enc_t *enc, SV *sv) |
332 |
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{ |
333 |
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double nv = SvNVX (sv); |
334 |
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335 |
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need (enc, 9); |
336 |
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337 |
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if (expect_false (nv == (U32)nv)) |
338 |
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encode_uint (enc, 0x00, (U32)nv); |
339 |
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//TODO: maybe I32? |
340 |
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else if (expect_false (nv == (float)nv)) |
341 |
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{ |
342 |
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uint32_t fp = ecb_float_to_binary32 (nv); |
343 |
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344 |
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*enc->cur++ = 0xe0 | 26; |
345 |
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346 |
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if (!ecb_big_endian ()) |
347 |
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fp = ecb_bswap32 (fp); |
348 |
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349 |
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memcpy (enc->cur, &fp, 4); |
350 |
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enc->cur += 4; |
351 |
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} |
352 |
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else |
353 |
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{ |
354 |
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uint64_t fp = ecb_double_to_binary64 (nv); |
355 |
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356 |
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*enc->cur++ = 0xe0 | 27; |
357 |
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358 |
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if (!ecb_big_endian ()) |
359 |
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fp = ecb_bswap64 (fp); |
360 |
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361 |
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memcpy (enc->cur, &fp, 8); |
362 |
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enc->cur += 8; |
363 |
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} |
364 |
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} |
365 |
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366 |
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static void |
367 |
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encode_sv (enc_t *enc, SV *sv) |
368 |
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{ |
369 |
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SvGETMAGIC (sv); |
370 |
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371 |
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if (SvPOKp (sv)) |
372 |
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{ |
373 |
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STRLEN len; |
374 |
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char *str = SvPV (sv, len); |
375 |
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encode_str (enc, SvUTF8 (sv), str, len); |
376 |
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} |
377 |
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else if (SvNOKp (sv)) |
378 |
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encode_nv (enc, sv); |
379 |
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else if (SvIOKp (sv)) |
380 |
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{ |
381 |
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if (SvIsUV (sv)) |
382 |
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encode_uint (enc, 0x00, SvUVX (sv)); |
383 |
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else if (SvIVX (sv) >= 0) |
384 |
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encode_uint (enc, 0x00, SvIVX (sv)); |
385 |
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else |
386 |
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encode_uint (enc, 0x20, -(SvIVX (sv) + 1)); |
387 |
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} |
388 |
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else if (SvROK (sv)) |
389 |
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encode_rv (enc, SvRV (sv)); |
390 |
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else if (!SvOK (sv)) |
391 |
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encode_ch (enc, 0xe0 | 22); |
392 |
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else if (enc->cbor.flags & F_ALLOW_UNKNOWN) |
393 |
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encode_ch (enc, 0xe0 | 23); |
394 |
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else |
395 |
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croak ("encountered perl type (%s,0x%x) that CBOR cannot handle, check your input data", |
396 |
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SvPV_nolen (sv), (unsigned int)SvFLAGS (sv)); |
397 |
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} |
398 |
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|
|
399 |
|
|
static SV * |
400 |
|
|
encode_cbor (SV *scalar, CBOR *cbor) |
401 |
|
|
{ |
402 |
|
|
enc_t enc; |
403 |
|
|
|
404 |
|
|
enc.cbor = *cbor; |
405 |
|
|
enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
406 |
|
|
enc.cur = SvPVX (enc.sv); |
407 |
|
|
enc.end = SvEND (enc.sv); |
408 |
|
|
enc.depth = 0; |
409 |
|
|
|
410 |
|
|
SvPOK_only (enc.sv); |
411 |
|
|
encode_sv (&enc, scalar); |
412 |
|
|
|
413 |
|
|
SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
414 |
|
|
*SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
415 |
|
|
|
416 |
|
|
if (enc.cbor.flags & F_SHRINK) |
417 |
|
|
shrink (enc.sv); |
418 |
|
|
|
419 |
|
|
return enc.sv; |
420 |
|
|
} |
421 |
|
|
|
422 |
|
|
///////////////////////////////////////////////////////////////////////////// |
423 |
|
|
// decoder |
424 |
|
|
|
425 |
|
|
// structure used for decoding CBOR |
426 |
|
|
typedef struct |
427 |
|
|
{ |
428 |
|
|
U8 *cur; // current parser pointer |
429 |
|
|
U8 *end; // end of input string |
430 |
|
|
const char *err; // parse error, if != 0 |
431 |
|
|
CBOR cbor; |
432 |
|
|
U32 depth; // recursion depth |
433 |
|
|
U32 maxdepth; // recursion depth limit |
434 |
|
|
} dec_t; |
435 |
|
|
|
436 |
|
|
#define ERR(reason) SB if (!dec->err) dec->err = reason; goto fail; SE |
437 |
|
|
|
438 |
|
|
#define WANT(len) if (expect_false (dec->cur + len > dec->end)) ERR ("unexpected end of CBOR data"); |
439 |
|
|
|
440 |
|
|
#define DEC_INC_DEPTH if (++dec->depth > dec->cbor.max_depth) ERR (ERR_NESTING_EXCEEDED) |
441 |
|
|
#define DEC_DEC_DEPTH --dec->depth |
442 |
|
|
|
443 |
|
|
static UV |
444 |
|
|
decode_uint (dec_t *dec) |
445 |
|
|
{ |
446 |
|
|
switch (*dec->cur & 31) |
447 |
|
|
{ |
448 |
|
|
case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: |
449 |
|
|
case 8: case 9: case 10: case 11: case 12: case 13: case 14: case 15: |
450 |
|
|
case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23: |
451 |
|
|
return *dec->cur++ & 31; |
452 |
|
|
|
453 |
|
|
case 24: |
454 |
|
|
WANT (2); |
455 |
|
|
dec->cur += 2; |
456 |
|
|
return dec->cur[-1]; |
457 |
|
|
|
458 |
|
|
case 25: |
459 |
|
|
WANT (3); |
460 |
|
|
dec->cur += 3; |
461 |
|
|
return (((UV)dec->cur[-2]) << 8) |
462 |
|
|
| ((UV)dec->cur[-1]); |
463 |
|
|
|
464 |
|
|
case 26: |
465 |
|
|
WANT (5); |
466 |
|
|
dec->cur += 5; |
467 |
|
|
return (((UV)dec->cur[-4]) << 24) |
468 |
|
|
| (((UV)dec->cur[-3]) << 16) |
469 |
|
|
| (((UV)dec->cur[-2]) << 8) |
470 |
|
|
| ((UV)dec->cur[-1]); |
471 |
|
|
|
472 |
|
|
case 27: |
473 |
|
|
WANT (9); |
474 |
|
|
dec->cur += 9; |
475 |
|
|
return (((UV)dec->cur[-8]) << 56) |
476 |
|
|
| (((UV)dec->cur[-7]) << 48) |
477 |
|
|
| (((UV)dec->cur[-6]) << 40) |
478 |
|
|
| (((UV)dec->cur[-5]) << 32) |
479 |
|
|
| (((UV)dec->cur[-4]) << 24) |
480 |
|
|
| (((UV)dec->cur[-3]) << 16) |
481 |
|
|
| (((UV)dec->cur[-2]) << 8) |
482 |
|
|
| ((UV)dec->cur[-1]); |
483 |
|
|
|
484 |
|
|
default: |
485 |
|
|
ERR ("corrupted CBOR data (unsupported integer minor encoding)"); |
486 |
|
|
} |
487 |
|
|
|
488 |
|
|
fail: |
489 |
|
|
return 0; |
490 |
|
|
} |
491 |
|
|
|
492 |
|
|
static SV *decode_sv (dec_t *dec); |
493 |
|
|
|
494 |
|
|
static SV * |
495 |
|
|
decode_av (dec_t *dec) |
496 |
|
|
{ |
497 |
|
|
AV *av = newAV (); |
498 |
|
|
|
499 |
|
|
DEC_INC_DEPTH; |
500 |
|
|
|
501 |
|
|
if ((*dec->cur & 31) == 31) |
502 |
|
|
{ |
503 |
|
|
++dec->cur; |
504 |
|
|
|
505 |
|
|
for (;;) |
506 |
|
|
{ |
507 |
|
|
WANT (1); |
508 |
|
|
|
509 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
510 |
root |
1.1 |
{ |
511 |
|
|
++dec->cur; |
512 |
|
|
break; |
513 |
|
|
} |
514 |
|
|
|
515 |
|
|
av_push (av, decode_sv (dec)); |
516 |
|
|
} |
517 |
|
|
} |
518 |
|
|
else |
519 |
|
|
{ |
520 |
|
|
int i, len = decode_uint (dec); |
521 |
|
|
|
522 |
|
|
av_fill (av, len - 1); |
523 |
|
|
|
524 |
|
|
for (i = 0; i < len; ++i) |
525 |
|
|
AvARRAY (av)[i] = decode_sv (dec); |
526 |
|
|
} |
527 |
|
|
|
528 |
|
|
DEC_DEC_DEPTH; |
529 |
|
|
return newRV_noinc ((SV *)av); |
530 |
|
|
|
531 |
|
|
fail: |
532 |
|
|
SvREFCNT_dec (av); |
533 |
|
|
DEC_DEC_DEPTH; |
534 |
|
|
return &PL_sv_undef; |
535 |
|
|
} |
536 |
|
|
|
537 |
|
|
static SV * |
538 |
|
|
decode_hv (dec_t *dec) |
539 |
|
|
{ |
540 |
|
|
HV *hv = newHV (); |
541 |
|
|
|
542 |
|
|
DEC_INC_DEPTH; |
543 |
|
|
|
544 |
|
|
if ((*dec->cur & 31) == 31) |
545 |
|
|
{ |
546 |
|
|
++dec->cur; |
547 |
|
|
|
548 |
|
|
for (;;) |
549 |
|
|
{ |
550 |
|
|
WANT (1); |
551 |
|
|
|
552 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
553 |
root |
1.1 |
{ |
554 |
|
|
++dec->cur; |
555 |
|
|
break; |
556 |
|
|
} |
557 |
|
|
|
558 |
|
|
SV *k = decode_sv (dec); |
559 |
|
|
SV *v = decode_sv (dec); |
560 |
|
|
|
561 |
|
|
hv_store_ent (hv, k, v, 0); |
562 |
|
|
} |
563 |
|
|
} |
564 |
|
|
else |
565 |
|
|
{ |
566 |
|
|
int len = decode_uint (dec); |
567 |
|
|
|
568 |
|
|
while (len--) |
569 |
|
|
{ |
570 |
|
|
SV *k = decode_sv (dec); |
571 |
|
|
SV *v = decode_sv (dec); |
572 |
|
|
|
573 |
|
|
hv_store_ent (hv, k, v, 0); |
574 |
|
|
} |
575 |
|
|
} |
576 |
|
|
|
577 |
|
|
DEC_DEC_DEPTH; |
578 |
|
|
return newRV_noinc ((SV *)hv); |
579 |
|
|
|
580 |
|
|
#if 0 |
581 |
|
|
SV *sv; |
582 |
|
|
HV *hv = newHV (); |
583 |
|
|
|
584 |
|
|
DEC_INC_DEPTH; |
585 |
|
|
decode_ws (dec); |
586 |
|
|
|
587 |
|
|
for (;;) |
588 |
|
|
{ |
589 |
|
|
// heuristic: assume that |
590 |
|
|
// a) decode_str + hv_store_ent are abysmally slow. |
591 |
|
|
// b) most hash keys are short, simple ascii text. |
592 |
|
|
// => try to "fast-match" such strings to avoid |
593 |
|
|
// the overhead of decode_str + hv_store_ent. |
594 |
|
|
{ |
595 |
|
|
SV *value; |
596 |
|
|
char *p = dec->cur; |
597 |
|
|
char *e = p + 24; // only try up to 24 bytes |
598 |
|
|
|
599 |
|
|
for (;;) |
600 |
|
|
{ |
601 |
|
|
// the >= 0x80 is false on most architectures |
602 |
|
|
if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\') |
603 |
|
|
{ |
604 |
|
|
// slow path, back up and use decode_str |
605 |
|
|
SV *key = decode_str (dec); |
606 |
|
|
if (!key) |
607 |
|
|
goto fail; |
608 |
|
|
|
609 |
|
|
decode_ws (dec); EXPECT_CH (':'); |
610 |
|
|
|
611 |
|
|
decode_ws (dec); |
612 |
|
|
value = decode_sv (dec); |
613 |
|
|
if (!value) |
614 |
|
|
{ |
615 |
|
|
SvREFCNT_dec (key); |
616 |
|
|
goto fail; |
617 |
|
|
} |
618 |
|
|
|
619 |
|
|
hv_store_ent (hv, key, value, 0); |
620 |
|
|
SvREFCNT_dec (key); |
621 |
|
|
|
622 |
|
|
break; |
623 |
|
|
} |
624 |
|
|
else if (*p == '"') |
625 |
|
|
{ |
626 |
|
|
// fast path, got a simple key |
627 |
|
|
char *key = dec->cur; |
628 |
|
|
int len = p - key; |
629 |
|
|
dec->cur = p + 1; |
630 |
|
|
|
631 |
|
|
decode_ws (dec); EXPECT_CH (':'); |
632 |
|
|
|
633 |
|
|
decode_ws (dec); |
634 |
|
|
value = decode_sv (dec); |
635 |
|
|
if (!value) |
636 |
|
|
goto fail; |
637 |
|
|
|
638 |
|
|
hv_store (hv, key, len, value, 0); |
639 |
|
|
|
640 |
|
|
break; |
641 |
|
|
} |
642 |
|
|
|
643 |
|
|
++p; |
644 |
|
|
} |
645 |
|
|
} |
646 |
|
|
|
647 |
|
|
decode_ws (dec); |
648 |
|
|
|
649 |
|
|
if (*dec->cur == '}') |
650 |
|
|
{ |
651 |
|
|
++dec->cur; |
652 |
|
|
break; |
653 |
|
|
} |
654 |
|
|
|
655 |
|
|
if (*dec->cur != ',') |
656 |
|
|
ERR (", or } expected while parsing object/hash"); |
657 |
|
|
|
658 |
|
|
++dec->cur; |
659 |
|
|
|
660 |
|
|
decode_ws (dec); |
661 |
|
|
|
662 |
|
|
if (*dec->cur == '}' && dec->cbor.flags & F_RELAXED) |
663 |
|
|
{ |
664 |
|
|
++dec->cur; |
665 |
|
|
break; |
666 |
|
|
} |
667 |
|
|
} |
668 |
|
|
|
669 |
|
|
DEC_DEC_DEPTH; |
670 |
|
|
sv = newRV_noinc ((SV *)hv); |
671 |
|
|
|
672 |
|
|
// check filter callbacks |
673 |
|
|
if (dec->cbor.flags & F_HOOK) |
674 |
|
|
{ |
675 |
|
|
if (dec->cbor.cb_sk_object && HvKEYS (hv) == 1) |
676 |
|
|
{ |
677 |
|
|
HE *cb, *he; |
678 |
|
|
|
679 |
|
|
hv_iterinit (hv); |
680 |
|
|
he = hv_iternext (hv); |
681 |
|
|
hv_iterinit (hv); |
682 |
|
|
|
683 |
|
|
// the next line creates a mortal sv each time its called. |
684 |
|
|
// might want to optimise this for common cases. |
685 |
|
|
cb = hv_fetch_ent (dec->cbor.cb_sk_object, hv_iterkeysv (he), 0, 0); |
686 |
|
|
|
687 |
|
|
if (cb) |
688 |
|
|
{ |
689 |
|
|
dSP; |
690 |
|
|
int count; |
691 |
|
|
|
692 |
|
|
ENTER; SAVETMPS; PUSHMARK (SP); |
693 |
|
|
XPUSHs (HeVAL (he)); |
694 |
|
|
sv_2mortal (sv); |
695 |
|
|
|
696 |
|
|
PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN; |
697 |
|
|
|
698 |
|
|
if (count == 1) |
699 |
|
|
{ |
700 |
|
|
sv = newSVsv (POPs); |
701 |
|
|
FREETMPS; LEAVE; |
702 |
|
|
return sv; |
703 |
|
|
} |
704 |
|
|
|
705 |
|
|
SvREFCNT_inc (sv); |
706 |
|
|
FREETMPS; LEAVE; |
707 |
|
|
} |
708 |
|
|
} |
709 |
|
|
|
710 |
|
|
if (dec->cbor.cb_object) |
711 |
|
|
{ |
712 |
|
|
dSP; |
713 |
|
|
int count; |
714 |
|
|
|
715 |
|
|
ENTER; SAVETMPS; PUSHMARK (SP); |
716 |
|
|
XPUSHs (sv_2mortal (sv)); |
717 |
|
|
|
718 |
|
|
PUTBACK; count = call_sv (dec->cbor.cb_object, G_ARRAY); SPAGAIN; |
719 |
|
|
|
720 |
|
|
if (count == 1) |
721 |
|
|
{ |
722 |
|
|
sv = newSVsv (POPs); |
723 |
|
|
FREETMPS; LEAVE; |
724 |
|
|
return sv; |
725 |
|
|
} |
726 |
|
|
|
727 |
|
|
SvREFCNT_inc (sv); |
728 |
|
|
FREETMPS; LEAVE; |
729 |
|
|
} |
730 |
|
|
} |
731 |
|
|
|
732 |
|
|
return sv; |
733 |
|
|
#endif |
734 |
|
|
|
735 |
|
|
fail: |
736 |
|
|
SvREFCNT_dec (hv); |
737 |
|
|
DEC_DEC_DEPTH; |
738 |
|
|
return &PL_sv_undef; |
739 |
|
|
} |
740 |
|
|
|
741 |
|
|
static SV * |
742 |
|
|
decode_str (dec_t *dec, int utf8) |
743 |
|
|
{ |
744 |
|
|
SV *sv; |
745 |
|
|
|
746 |
|
|
if ((*dec->cur & 31) == 31) |
747 |
|
|
{ |
748 |
|
|
++dec->cur; |
749 |
|
|
|
750 |
|
|
sv = newSVpvn ("", 0); |
751 |
|
|
|
752 |
|
|
// not very fast, and certainly not robust against illegal input |
753 |
|
|
for (;;) |
754 |
|
|
{ |
755 |
|
|
WANT (1); |
756 |
|
|
|
757 |
root |
1.2 |
if (*dec->cur == (0xe0 | 31)) |
758 |
root |
1.1 |
{ |
759 |
|
|
++dec->cur; |
760 |
|
|
break; |
761 |
|
|
} |
762 |
|
|
|
763 |
|
|
SV *sv2 = decode_sv (dec); |
764 |
|
|
sv_catsv (sv, sv2); |
765 |
|
|
} |
766 |
|
|
} |
767 |
|
|
else |
768 |
|
|
{ |
769 |
|
|
STRLEN len = decode_uint (dec); |
770 |
|
|
|
771 |
|
|
WANT (len); |
772 |
|
|
sv = newSVpvn (dec->cur, len); |
773 |
|
|
dec->cur += len; |
774 |
|
|
} |
775 |
|
|
|
776 |
|
|
if (utf8) |
777 |
|
|
SvUTF8_on (sv); |
778 |
|
|
|
779 |
|
|
return sv; |
780 |
|
|
|
781 |
|
|
fail: |
782 |
|
|
return &PL_sv_undef; |
783 |
|
|
} |
784 |
|
|
|
785 |
|
|
static SV * |
786 |
|
|
decode_sv (dec_t *dec) |
787 |
|
|
{ |
788 |
|
|
WANT (1); |
789 |
|
|
|
790 |
|
|
switch (*dec->cur >> 5) |
791 |
|
|
{ |
792 |
|
|
case 0: // unsigned int |
793 |
|
|
//TODO: 64 bit values on 3 2bit perls |
794 |
|
|
return newSVuv (decode_uint (dec)); |
795 |
|
|
case 1: // negative int |
796 |
|
|
return newSViv (-1 - (IV)decode_uint (dec)); |
797 |
|
|
case 2: // octet string |
798 |
|
|
return decode_str (dec, 0); |
799 |
|
|
case 3: // utf-8 string |
800 |
|
|
return decode_str (dec, 1); |
801 |
|
|
case 4: // array |
802 |
|
|
return decode_av (dec); |
803 |
|
|
case 5: // map |
804 |
|
|
return decode_hv (dec); |
805 |
|
|
case 6: // tag |
806 |
|
|
abort (); |
807 |
|
|
break; |
808 |
|
|
case 7: // misc |
809 |
|
|
switch (*dec->cur++ & 31) |
810 |
|
|
{ |
811 |
|
|
case 20: |
812 |
|
|
#if CBOR_SLOW |
813 |
|
|
cbor_false = get_bool ("CBOR::XS::false"); |
814 |
|
|
#endif |
815 |
|
|
return newSVsv (cbor_false); |
816 |
|
|
case 21: |
817 |
|
|
#if CBOR_SLOW |
818 |
|
|
cbor_true = get_bool ("CBOR::XS::true"); |
819 |
|
|
#endif |
820 |
|
|
return newSVsv (cbor_true); |
821 |
|
|
case 22: |
822 |
|
|
return newSVsv (&PL_sv_undef); |
823 |
|
|
|
824 |
|
|
case 25: |
825 |
root |
1.2 |
{ |
826 |
|
|
WANT (2); |
827 |
|
|
|
828 |
|
|
uint16_t fp = (dec->cur[0] << 8) | dec->cur[1]; |
829 |
|
|
dec->cur += 2; |
830 |
|
|
|
831 |
|
|
return newSVnv (ecb_binary16_to_float (fp)); |
832 |
|
|
} |
833 |
root |
1.1 |
|
834 |
|
|
case 26: |
835 |
|
|
{ |
836 |
|
|
uint32_t fp; |
837 |
|
|
WANT (4); |
838 |
|
|
memcpy (&fp, dec->cur, 4); |
839 |
|
|
dec->cur += 4; |
840 |
|
|
|
841 |
|
|
if (!ecb_big_endian ()) |
842 |
|
|
fp = ecb_bswap32 (fp); |
843 |
|
|
|
844 |
|
|
return newSVnv (ecb_binary32_to_float (fp)); |
845 |
|
|
} |
846 |
|
|
|
847 |
|
|
case 27: |
848 |
|
|
{ |
849 |
|
|
uint64_t fp; |
850 |
|
|
WANT (8); |
851 |
|
|
memcpy (&fp, dec->cur, 8); |
852 |
|
|
dec->cur += 8; |
853 |
|
|
|
854 |
|
|
if (!ecb_big_endian ()) |
855 |
|
|
fp = ecb_bswap64 (fp); |
856 |
|
|
|
857 |
|
|
return newSVnv (ecb_binary64_to_double (fp)); |
858 |
|
|
} |
859 |
|
|
|
860 |
|
|
// 0..19 unassigned |
861 |
|
|
// 24 reserved + unassigned (reserved values are not encodable) |
862 |
|
|
default: |
863 |
|
|
ERR ("corrupted CBOR data (reserved/unassigned major 7 value)"); |
864 |
|
|
} |
865 |
|
|
|
866 |
|
|
break; |
867 |
|
|
} |
868 |
|
|
#if 0 |
869 |
|
|
switch (*dec->cur) |
870 |
|
|
{ |
871 |
|
|
//case '"': ++dec->cur; return decode_str (dec); |
872 |
|
|
case '[': ++dec->cur; return decode_av (dec); |
873 |
|
|
case '{': ++dec->cur; return decode_hv (dec); |
874 |
|
|
|
875 |
|
|
case '-': |
876 |
|
|
case '0': case '1': case '2': case '3': case '4': |
877 |
|
|
case '5': case '6': case '7': case '8': case '9': |
878 |
|
|
//TODO return decode_num (dec); |
879 |
|
|
|
880 |
|
|
case 't': |
881 |
|
|
if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
882 |
|
|
{ |
883 |
|
|
dec->cur += 4; |
884 |
|
|
#if CBOR_SLOW |
885 |
|
|
cbor_true = get_bool ("CBOR::XS::true"); |
886 |
|
|
#endif |
887 |
|
|
return newSVsv (cbor_true); |
888 |
|
|
} |
889 |
|
|
else |
890 |
|
|
ERR ("'true' expected"); |
891 |
|
|
|
892 |
|
|
break; |
893 |
|
|
|
894 |
|
|
case 'f': |
895 |
|
|
if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
896 |
|
|
{ |
897 |
|
|
dec->cur += 5; |
898 |
|
|
#if CBOR_SLOW |
899 |
|
|
cbor_false = get_bool ("CBOR::XS::false"); |
900 |
|
|
#endif |
901 |
|
|
return newSVsv (cbor_false); |
902 |
|
|
} |
903 |
|
|
else |
904 |
|
|
ERR ("'false' expected"); |
905 |
|
|
|
906 |
|
|
break; |
907 |
|
|
|
908 |
|
|
case 'n': |
909 |
|
|
if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4)) |
910 |
|
|
{ |
911 |
|
|
dec->cur += 4; |
912 |
|
|
return newSVsv (&PL_sv_undef); |
913 |
|
|
} |
914 |
|
|
else |
915 |
|
|
ERR ("'null' expected"); |
916 |
|
|
|
917 |
|
|
break; |
918 |
|
|
|
919 |
|
|
default: |
920 |
|
|
ERR ("malformed CBOR string, neither array, object, number, string or atom"); |
921 |
|
|
break; |
922 |
|
|
} |
923 |
|
|
#endif |
924 |
|
|
|
925 |
|
|
fail: |
926 |
|
|
return &PL_sv_undef; |
927 |
|
|
} |
928 |
|
|
|
929 |
|
|
static SV * |
930 |
|
|
decode_cbor (SV *string, CBOR *cbor, char **offset_return) |
931 |
|
|
{ |
932 |
|
|
dec_t dec; |
933 |
|
|
SV *sv; |
934 |
|
|
|
935 |
|
|
/* work around bugs in 5.10 where manipulating magic values |
936 |
|
|
* makes perl ignore the magic in subsequent accesses. |
937 |
|
|
* also make a copy of non-PV values, to get them into a clean |
938 |
|
|
* state (SvPV should do that, but it's buggy, see below). |
939 |
|
|
*/ |
940 |
|
|
/*SvGETMAGIC (string);*/ |
941 |
|
|
if (SvMAGICAL (string) || !SvPOK (string)) |
942 |
|
|
string = sv_2mortal (newSVsv (string)); |
943 |
|
|
|
944 |
|
|
SvUPGRADE (string, SVt_PV); |
945 |
|
|
|
946 |
|
|
/* work around a bug in perl 5.10, which causes SvCUR to fail an |
947 |
|
|
* assertion with -DDEBUGGING, although SvCUR is documented to |
948 |
|
|
* return the xpv_cur field which certainly exists after upgrading. |
949 |
|
|
* according to nicholas clark, calling SvPOK fixes this. |
950 |
|
|
* But it doesn't fix it, so try another workaround, call SvPV_nolen |
951 |
|
|
* and hope for the best. |
952 |
|
|
* Damnit, SvPV_nolen still trips over yet another assertion. This |
953 |
|
|
* assertion business is seriously broken, try yet another workaround |
954 |
|
|
* for the broken -DDEBUGGING. |
955 |
|
|
*/ |
956 |
|
|
{ |
957 |
|
|
#ifdef DEBUGGING |
958 |
|
|
STRLEN offset = SvOK (string) ? sv_len (string) : 0; |
959 |
|
|
#else |
960 |
|
|
STRLEN offset = SvCUR (string); |
961 |
|
|
#endif |
962 |
|
|
|
963 |
|
|
if (offset > cbor->max_size && cbor->max_size) |
964 |
|
|
croak ("attempted decode of CBOR text of %lu bytes size, but max_size is set to %lu", |
965 |
|
|
(unsigned long)SvCUR (string), (unsigned long)cbor->max_size); |
966 |
|
|
} |
967 |
|
|
|
968 |
|
|
sv_utf8_downgrade (string, 0); |
969 |
|
|
|
970 |
|
|
dec.cbor = *cbor; |
971 |
|
|
dec.cur = (U8 *)SvPVX (string); |
972 |
|
|
dec.end = (U8 *)SvEND (string); |
973 |
|
|
dec.err = 0; |
974 |
|
|
dec.depth = 0; |
975 |
|
|
|
976 |
|
|
if (dec.cbor.cb_object || dec.cbor.cb_sk_object) |
977 |
|
|
;//TODO dec.cbor.flags |= F_HOOK; |
978 |
|
|
|
979 |
|
|
sv = decode_sv (&dec); |
980 |
|
|
|
981 |
|
|
if (offset_return) |
982 |
|
|
*offset_return = dec.cur; |
983 |
|
|
|
984 |
|
|
if (!(offset_return || !sv)) |
985 |
root |
1.2 |
if (dec.cur != dec.end && !dec.err) |
986 |
|
|
dec.err = "garbage after CBOR object"; |
987 |
|
|
|
988 |
|
|
if (dec.err) |
989 |
root |
1.1 |
{ |
990 |
root |
1.2 |
SvREFCNT_dec (sv); |
991 |
|
|
croak ("%s, at offset %d (octet 0x%02x)", dec.err, dec.cur - (U8 *)SvPVX (string), (int)(uint8_t)*dec.cur); |
992 |
root |
1.1 |
} |
993 |
|
|
|
994 |
|
|
sv = sv_2mortal (sv); |
995 |
|
|
|
996 |
|
|
return sv; |
997 |
|
|
} |
998 |
|
|
|
999 |
|
|
///////////////////////////////////////////////////////////////////////////// |
1000 |
|
|
// XS interface functions |
1001 |
|
|
|
1002 |
|
|
MODULE = CBOR::XS PACKAGE = CBOR::XS |
1003 |
|
|
|
1004 |
|
|
BOOT: |
1005 |
|
|
{ |
1006 |
|
|
cbor_stash = gv_stashpv ("CBOR::XS" , 1); |
1007 |
|
|
cbor_boolean_stash = gv_stashpv ("CBOR::XS::Boolean", 1); |
1008 |
|
|
|
1009 |
|
|
cbor_true = get_bool ("CBOR::XS::true"); |
1010 |
|
|
cbor_false = get_bool ("CBOR::XS::false"); |
1011 |
|
|
} |
1012 |
|
|
|
1013 |
|
|
PROTOTYPES: DISABLE |
1014 |
|
|
|
1015 |
|
|
void CLONE (...) |
1016 |
|
|
CODE: |
1017 |
|
|
cbor_stash = 0; |
1018 |
|
|
cbor_boolean_stash = 0; |
1019 |
|
|
|
1020 |
|
|
void new (char *klass) |
1021 |
|
|
PPCODE: |
1022 |
|
|
{ |
1023 |
|
|
SV *pv = NEWSV (0, sizeof (CBOR)); |
1024 |
|
|
SvPOK_only (pv); |
1025 |
|
|
cbor_init ((CBOR *)SvPVX (pv)); |
1026 |
|
|
XPUSHs (sv_2mortal (sv_bless ( |
1027 |
|
|
newRV_noinc (pv), |
1028 |
|
|
strEQ (klass, "CBOR::XS") ? CBOR_STASH : gv_stashpv (klass, 1) |
1029 |
|
|
))); |
1030 |
|
|
} |
1031 |
|
|
|
1032 |
|
|
void shrink (CBOR *self, int enable = 1) |
1033 |
|
|
ALIAS: |
1034 |
|
|
shrink = F_SHRINK |
1035 |
|
|
allow_unknown = F_ALLOW_UNKNOWN |
1036 |
|
|
PPCODE: |
1037 |
|
|
{ |
1038 |
|
|
if (enable) |
1039 |
|
|
self->flags |= ix; |
1040 |
|
|
else |
1041 |
|
|
self->flags &= ~ix; |
1042 |
|
|
|
1043 |
|
|
XPUSHs (ST (0)); |
1044 |
|
|
} |
1045 |
|
|
|
1046 |
|
|
void get_shrink (CBOR *self) |
1047 |
|
|
ALIAS: |
1048 |
|
|
get_shrink = F_SHRINK |
1049 |
|
|
get_allow_unknown = F_ALLOW_UNKNOWN |
1050 |
|
|
PPCODE: |
1051 |
|
|
XPUSHs (boolSV (self->flags & ix)); |
1052 |
|
|
|
1053 |
|
|
void max_depth (CBOR *self, U32 max_depth = 0x80000000UL) |
1054 |
|
|
PPCODE: |
1055 |
|
|
self->max_depth = max_depth; |
1056 |
|
|
XPUSHs (ST (0)); |
1057 |
|
|
|
1058 |
|
|
U32 get_max_depth (CBOR *self) |
1059 |
|
|
CODE: |
1060 |
|
|
RETVAL = self->max_depth; |
1061 |
|
|
OUTPUT: |
1062 |
|
|
RETVAL |
1063 |
|
|
|
1064 |
|
|
void max_size (CBOR *self, U32 max_size = 0) |
1065 |
|
|
PPCODE: |
1066 |
|
|
self->max_size = max_size; |
1067 |
|
|
XPUSHs (ST (0)); |
1068 |
|
|
|
1069 |
|
|
int get_max_size (CBOR *self) |
1070 |
|
|
CODE: |
1071 |
|
|
RETVAL = self->max_size; |
1072 |
|
|
OUTPUT: |
1073 |
|
|
RETVAL |
1074 |
|
|
|
1075 |
|
|
#if 0 //TODO |
1076 |
|
|
|
1077 |
|
|
void filter_cbor_object (CBOR *self, SV *cb = &PL_sv_undef) |
1078 |
|
|
PPCODE: |
1079 |
|
|
{ |
1080 |
|
|
SvREFCNT_dec (self->cb_object); |
1081 |
|
|
self->cb_object = SvOK (cb) ? newSVsv (cb) : 0; |
1082 |
|
|
|
1083 |
|
|
XPUSHs (ST (0)); |
1084 |
|
|
} |
1085 |
|
|
|
1086 |
|
|
void filter_cbor_single_key_object (CBOR *self, SV *key, SV *cb = &PL_sv_undef) |
1087 |
|
|
PPCODE: |
1088 |
|
|
{ |
1089 |
|
|
if (!self->cb_sk_object) |
1090 |
|
|
self->cb_sk_object = newHV (); |
1091 |
|
|
|
1092 |
|
|
if (SvOK (cb)) |
1093 |
|
|
hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0); |
1094 |
|
|
else |
1095 |
|
|
{ |
1096 |
|
|
hv_delete_ent (self->cb_sk_object, key, G_DISCARD, 0); |
1097 |
|
|
|
1098 |
|
|
if (!HvKEYS (self->cb_sk_object)) |
1099 |
|
|
{ |
1100 |
|
|
SvREFCNT_dec (self->cb_sk_object); |
1101 |
|
|
self->cb_sk_object = 0; |
1102 |
|
|
} |
1103 |
|
|
} |
1104 |
|
|
|
1105 |
|
|
XPUSHs (ST (0)); |
1106 |
|
|
} |
1107 |
|
|
|
1108 |
|
|
#endif |
1109 |
|
|
|
1110 |
|
|
void encode (CBOR *self, SV *scalar) |
1111 |
|
|
PPCODE: |
1112 |
|
|
PUTBACK; scalar = encode_cbor (scalar, self); SPAGAIN; |
1113 |
|
|
XPUSHs (scalar); |
1114 |
|
|
|
1115 |
|
|
void decode (CBOR *self, SV *cborstr) |
1116 |
|
|
PPCODE: |
1117 |
|
|
PUTBACK; cborstr = decode_cbor (cborstr, self, 0); SPAGAIN; |
1118 |
|
|
XPUSHs (cborstr); |
1119 |
|
|
|
1120 |
|
|
void decode_prefix (CBOR *self, SV *cborstr) |
1121 |
|
|
PPCODE: |
1122 |
|
|
{ |
1123 |
|
|
SV *sv; |
1124 |
|
|
char *offset; |
1125 |
|
|
PUTBACK; sv = decode_cbor (cborstr, self, &offset); SPAGAIN; |
1126 |
|
|
EXTEND (SP, 2); |
1127 |
|
|
PUSHs (sv); |
1128 |
|
|
PUSHs (sv_2mortal (newSVuv (offset - SvPVX (cborstr)))); |
1129 |
|
|
} |
1130 |
|
|
|
1131 |
|
|
void DESTROY (CBOR *self) |
1132 |
|
|
CODE: |
1133 |
|
|
SvREFCNT_dec (self->cb_sk_object); |
1134 |
|
|
SvREFCNT_dec (self->cb_object); |
1135 |
|
|
|
1136 |
|
|
PROTOTYPES: ENABLE |
1137 |
|
|
|
1138 |
|
|
void encode_cbor (SV *scalar) |
1139 |
|
|
PPCODE: |
1140 |
|
|
{ |
1141 |
|
|
CBOR cbor; |
1142 |
|
|
cbor_init (&cbor); |
1143 |
|
|
PUTBACK; scalar = encode_cbor (scalar, &cbor); SPAGAIN; |
1144 |
|
|
XPUSHs (scalar); |
1145 |
|
|
} |
1146 |
|
|
|
1147 |
|
|
void decode_cbor (SV *cborstr) |
1148 |
|
|
PPCODE: |
1149 |
|
|
{ |
1150 |
|
|
CBOR cbor; |
1151 |
|
|
cbor_init (&cbor); |
1152 |
|
|
PUTBACK; cborstr = decode_cbor (cborstr, &cbor, 0); SPAGAIN; |
1153 |
|
|
XPUSHs (cborstr); |
1154 |
|
|
} |
1155 |
|
|
|