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Comparing JSON-XS/XS.xs (file contents):
Revision 1.54 by root, Tue Jul 10 16:22:31 2007 UTC vs.
Revision 1.120 by root, Mon Oct 28 23:23:10 2013 UTC

1#include "EXTERN.h" 1#include "EXTERN.h"
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include "assert.h" 5#include <assert.h>
6#include "string.h" 6#include <string.h>
7#include "stdlib.h" 7#include <stdlib.h>
8#include "stdio.h" 8#include <stdio.h>
9#include <limits.h>
10#include <float.h>
9 11
10#if defined(__BORLANDC__) || defined(_MSC_VER) 12#if defined(__BORLANDC__) || defined(_MSC_VER)
11# define snprintf _snprintf // C compilers have this in stdio.h 13# define snprintf _snprintf // C compilers have this in stdio.h
12#endif 14#endif
13 15
14// some old perls do not have this, try to make it work, no 16// some old perls do not have this, try to make it work, no
15// guarentees, though. if it breaks, you get to keep the pieces. 17// guarantees, though. if it breaks, you get to keep the pieces.
16#ifndef UTF8_MAXBYTES 18#ifndef UTF8_MAXBYTES
17# define UTF8_MAXBYTES 13 19# define UTF8_MAXBYTES 13
18#endif 20#endif
21
22// three extra for rounding, sign, and end of string
23#define IVUV_MAXCHARS (sizeof (UV) * CHAR_BIT * 28 / 93 + 3)
19 24
20#define F_ASCII 0x00000001UL 25#define F_ASCII 0x00000001UL
21#define F_LATIN1 0x00000002UL 26#define F_LATIN1 0x00000002UL
22#define F_UTF8 0x00000004UL 27#define F_UTF8 0x00000004UL
23#define F_INDENT 0x00000008UL 28#define F_INDENT 0x00000008UL
… …
26#define F_SPACE_AFTER 0x00000040UL 31#define F_SPACE_AFTER 0x00000040UL
27#define F_ALLOW_NONREF 0x00000100UL 32#define F_ALLOW_NONREF 0x00000100UL
28#define F_SHRINK 0x00000200UL 33#define F_SHRINK 0x00000200UL
29#define F_ALLOW_BLESSED 0x00000400UL 34#define F_ALLOW_BLESSED 0x00000400UL
30#define F_CONV_BLESSED 0x00000800UL 35#define F_CONV_BLESSED 0x00000800UL
31#define F_MAXDEPTH 0xf8000000UL
32#define S_MAXDEPTH 27
33#define F_MAXSIZE 0x01f00000UL 36#define F_RELAXED 0x00001000UL
34#define S_MAXSIZE 20 37#define F_ALLOW_UNKNOWN 0x00002000UL
38#define F_ALLOW_TAGS 0x00004000UL
35#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing 39#define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing
36 40
37#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
38#define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE ))
39
40#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER 41#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
41#define F_DEFAULT (9UL << S_MAXDEPTH)
42 42
43#define INIT_SIZE 32 // initial scalar size to be allocated 43#define INIT_SIZE 32 // initial scalar size to be allocated
44#define INDENT_STEP 3 // spaces per indentation level 44#define INDENT_STEP 3 // spaces per indentation level
45 45
46#define SHORT_STRING_LEN 16384 // special-case strings of up to this size 46#define SHORT_STRING_LEN 16384 // special-case strings of up to this size
47 47
48#define DECODE_WANTS_OCTETS(json) ((json)->flags & F_UTF8)
49
48#define SB do { 50#define SB do {
49#define SE } while (0) 51#define SE } while (0)
50 52
51#if __GNUC__ >= 3 53#if __GNUC__ >= 3
52# define expect(expr,value) __builtin_expect ((expr),(value)) 54# define expect(expr,value) __builtin_expect ((expr), (value))
53# define inline inline 55# define INLINE static inline
54#else 56#else
55# define expect(expr,value) (expr) 57# define expect(expr,value) (expr)
56# define inline static 58# define INLINE static
57#endif 59#endif
58 60
59#define expect_false(expr) expect ((expr) != 0, 0) 61#define expect_false(expr) expect ((expr) != 0, 0)
60#define expect_true(expr) expect ((expr) != 0, 1) 62#define expect_true(expr) expect ((expr) != 0, 1)
61 63
64#define IN_RANGE_INC(type,val,beg,end) \
65 ((unsigned type)((unsigned type)(val) - (unsigned type)(beg)) \
66 <= (unsigned type)((unsigned type)(end) - (unsigned type)(beg)))
67
68#define ERR_NESTING_EXCEEDED "json text or perl structure exceeds maximum nesting level (max_depth set too low?)"
69
70#ifdef USE_ITHREADS
71# define JSON_SLOW 1
72# define JSON_STASH (json_stash ? json_stash : gv_stashpv ("JSON::XS", 1))
73#else
74# define JSON_SLOW 0
75# define JSON_STASH json_stash
76#endif
77
78// the amount of HEs to allocate on the stack, when sorting keys
79#define STACK_HES 64
80
62static HV *json_stash, *json_boolean_stash; // JSON::XS:: 81static HV *json_stash, *types_boolean_stash; // JSON::XS::
63static SV *json_true, *json_false; 82static SV *types_true, *types_false, *sv_json;
83
84enum {
85 INCR_M_WS = 0, // initial whitespace skipping, must be 0
86 INCR_M_STR, // inside string
87 INCR_M_BS, // inside backslash
88 INCR_M_C0, // inside comment in initial whitespace sequence
89 INCR_M_C1, // inside comment in other places
90 INCR_M_JSON // outside anything, count nesting
91};
92
93#define INCR_DONE(json) ((json)->incr_nest <= 0 && (json)->incr_mode == INCR_M_JSON)
64 94
65typedef struct { 95typedef struct {
66 U32 flags; 96 U32 flags;
97 U32 max_depth;
98 STRLEN max_size;
99
67 SV *cb_object; 100 SV *cb_object;
68 HV *cb_sk_object; 101 HV *cb_sk_object;
102
103 // for the incremental parser
104 SV *incr_text; // the source text so far
105 STRLEN incr_pos; // the current offset into the text
106 int incr_nest; // {[]}-nesting level
107 unsigned char incr_mode;
69} JSON; 108} JSON;
109
110INLINE void
111json_init (JSON *json)
112{
113 Zero (json, 1, JSON);
114 json->max_depth = 512;
115}
70 116
71///////////////////////////////////////////////////////////////////////////// 117/////////////////////////////////////////////////////////////////////////////
72// utility functions 118// utility functions
73 119
74inline void 120INLINE SV *
121get_bool (const char *name)
122{
123 SV *sv = get_sv (name, 1);
124
125 SvREADONLY_on (sv);
126 SvREADONLY_on (SvRV (sv));
127
128 return sv;
129}
130
131INLINE void
75shrink (SV *sv) 132shrink (SV *sv)
76{ 133{
77 sv_utf8_downgrade (sv, 1); 134 sv_utf8_downgrade (sv, 1);
135
78 if (SvLEN (sv) > SvCUR (sv) + 1) 136 if (SvLEN (sv) > SvCUR (sv) + 1)
79 { 137 {
80#ifdef SvPV_shrink_to_cur 138#ifdef SvPV_shrink_to_cur
81 SvPV_shrink_to_cur (sv); 139 SvPV_shrink_to_cur (sv);
82#elif defined (SvPV_renew) 140#elif defined (SvPV_renew)
… …
88// decode an utf-8 character and return it, or (UV)-1 in 146// decode an utf-8 character and return it, or (UV)-1 in
89// case of an error. 147// case of an error.
90// we special-case "safe" characters from U+80 .. U+7FF, 148// we special-case "safe" characters from U+80 .. U+7FF,
91// but use the very good perl function to parse anything else. 149// but use the very good perl function to parse anything else.
92// note that we never call this function for a ascii codepoints 150// note that we never call this function for a ascii codepoints
93inline UV 151INLINE UV
94decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen) 152decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
95{ 153{
96 if (expect_false (s[0] > 0xdf || s[0] < 0xc2)) 154 if (expect_true (len >= 2
97 return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY); 155 && IN_RANGE_INC (char, s[0], 0xc2, 0xdf)
98 else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf) 156 && IN_RANGE_INC (char, s[1], 0x80, 0xbf)))
99 { 157 {
100 *clen = 2; 158 *clen = 2;
101 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); 159 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
102 } 160 }
103 else 161 else
104 { 162 return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
105 *clen = (STRLEN)-1; 163}
106 return (UV)-1; 164
165// likewise for encoding, also never called for ascii codepoints
166// this function takes advantage of this fact, although current gccs
167// seem to optimise the check for >= 0x80 away anyways
168INLINE unsigned char *
169encode_utf8 (unsigned char *s, UV ch)
170{
171 if (expect_false (ch < 0x000080))
172 *s++ = ch;
173 else if (expect_true (ch < 0x000800))
174 *s++ = 0xc0 | ( ch >> 6),
175 *s++ = 0x80 | ( ch & 0x3f);
176 else if ( ch < 0x010000)
177 *s++ = 0xe0 | ( ch >> 12),
178 *s++ = 0x80 | ((ch >> 6) & 0x3f),
179 *s++ = 0x80 | ( ch & 0x3f);
180 else if ( ch < 0x110000)
181 *s++ = 0xf0 | ( ch >> 18),
182 *s++ = 0x80 | ((ch >> 12) & 0x3f),
183 *s++ = 0x80 | ((ch >> 6) & 0x3f),
184 *s++ = 0x80 | ( ch & 0x3f);
185
186 return s;
187}
188
189// convert offset pointer to character index, sv must be string
190static STRLEN
191ptr_to_index (SV *sv, char *offset)
192{
193 return SvUTF8 (sv)
194 ? utf8_distance (offset, SvPVX (sv))
195 : offset - SvPVX (sv);
196}
197
198/////////////////////////////////////////////////////////////////////////////
199// fp hell
200
201// scan a group of digits, and a trailing exponent
202static void
203json_atof_scan1 (const char *s, NV *accum, int *expo, int postdp, int maxdepth)
204{
205 UV uaccum = 0;
206 int eaccum = 0;
207
208 // if we recurse too deep, skip all remaining digits
209 // to avoid a stack overflow attack
210 if (expect_false (--maxdepth <= 0))
211 while (((U8)*s - '0') < 10)
212 ++s;
213
214 for (;;)
107 } 215 {
108} 216 U8 dig = (U8)*s - '0';
109 217
218 if (expect_false (dig >= 10))
219 {
220 if (dig == (U8)((U8)'.' - (U8)'0'))
221 {
222 ++s;
223 json_atof_scan1 (s, accum, expo, 1, maxdepth);
224 }
225 else if ((dig | ' ') == 'e' - '0')
226 {
227 int exp2 = 0;
228 int neg = 0;
229
230 ++s;
231
232 if (*s == '-')
233 {
234 ++s;
235 neg = 1;
236 }
237 else if (*s == '+')
238 ++s;
239
240 while ((dig = (U8)*s - '0') < 10)
241 exp2 = exp2 * 10 + *s++ - '0';
242
243 *expo += neg ? -exp2 : exp2;
244 }
245
246 break;
247 }
248
249 ++s;
250
251 uaccum = uaccum * 10 + dig;
252 ++eaccum;
253
254 // if we have too many digits, then recurse for more
255 // we actually do this for rather few digits
256 if (uaccum >= (UV_MAX - 9) / 10)
257 {
258 if (postdp) *expo -= eaccum;
259 json_atof_scan1 (s, accum, expo, postdp, maxdepth);
260 if (postdp) *expo += eaccum;
261
262 break;
263 }
264 }
265
266 // this relies greatly on the quality of the pow ()
267 // implementation of the platform, but a good
268 // implementation is hard to beat.
269 // (IEEE 754 conformant ones are required to be exact)
270 if (postdp) *expo -= eaccum;
271 *accum += uaccum * Perl_pow (10., *expo);
272 *expo += eaccum;
273}
274
275static NV
276json_atof (const char *s)
277{
278 NV accum = 0.;
279 int expo = 0;
280 int neg = 0;
281
282 if (*s == '-')
283 {
284 ++s;
285 neg = 1;
286 }
287
288 // a recursion depth of ten gives us >>500 bits
289 json_atof_scan1 (s, &accum, &expo, 0, 10);
290
291 return neg ? -accum : accum;
292}
110///////////////////////////////////////////////////////////////////////////// 293/////////////////////////////////////////////////////////////////////////////
111// encoder 294// encoder
112 295
113// structure used for encoding JSON 296// structure used for encoding JSON
114typedef struct 297typedef struct
… …
116 char *cur; // SvPVX (sv) + current output position 299 char *cur; // SvPVX (sv) + current output position
117 char *end; // SvEND (sv) 300 char *end; // SvEND (sv)
118 SV *sv; // result scalar 301 SV *sv; // result scalar
119 JSON json; 302 JSON json;
120 U32 indent; // indentation level 303 U32 indent; // indentation level
121 U32 maxdepth; // max. indentation/recursion level 304 UV limit; // escape character values >= this value when encoding
122} enc_t; 305} enc_t;
123 306
124inline void 307INLINE void
125need (enc_t *enc, STRLEN len) 308need (enc_t *enc, STRLEN len)
126{ 309{
127 if (expect_false (enc->cur + len >= enc->end)) 310 if (expect_false (enc->cur + len >= enc->end))
128 { 311 {
129 STRLEN cur = enc->cur - SvPVX (enc->sv); 312 STRLEN cur = enc->cur - (char *)SvPVX (enc->sv);
130 SvGROW (enc->sv, cur + len + 1); 313 SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
131 enc->cur = SvPVX (enc->sv) + cur; 314 enc->cur = SvPVX (enc->sv) + cur;
132 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; 315 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
133 } 316 }
134} 317}
135 318
136inline void 319INLINE void
137encode_ch (enc_t *enc, char ch) 320encode_ch (enc_t *enc, char ch)
138{ 321{
139 need (enc, 1); 322 need (enc, 1);
140 *enc->cur++ = ch; 323 *enc->cur++ = ch;
141} 324}
… …
195 { 378 {
196 uch = ch; 379 uch = ch;
197 clen = 1; 380 clen = 1;
198 } 381 }
199 382
200 if (uch > 0x10FFFFUL) 383 if (uch < 0x80/*0x20*/ || uch >= enc->limit)
201 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
202
203 if (uch < 0x80 || enc->json.flags & F_ASCII || (enc->json.flags & F_LATIN1 && uch > 0xFF))
204 { 384 {
205 if (uch > 0xFFFFUL) 385 if (uch >= 0x10000UL)
206 { 386 {
387 if (uch >= 0x110000UL)
388 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
389
207 need (enc, len += 11); 390 need (enc, len += 11);
208 sprintf (enc->cur, "\\u%04x\\u%04x", 391 sprintf (enc->cur, "\\u%04x\\u%04x",
209 (int)((uch - 0x10000) / 0x400 + 0xD800), 392 (int)((uch - 0x10000) / 0x400 + 0xD800),
210 (int)((uch - 0x10000) % 0x400 + 0xDC00)); 393 (int)((uch - 0x10000) % 0x400 + 0xDC00));
211 enc->cur += 12; 394 enc->cur += 12;
212 } 395 }
213 else 396 else
214 { 397 {
215 static char hexdigit [16] = "0123456789abcdef";
216 need (enc, len += 5); 398 need (enc, len += 5);
217 *enc->cur++ = '\\'; 399 *enc->cur++ = '\\';
218 *enc->cur++ = 'u'; 400 *enc->cur++ = 'u';
219 *enc->cur++ = hexdigit [ uch >> 12 ]; 401 *enc->cur++ = PL_hexdigit [ uch >> 12 ];
220 *enc->cur++ = hexdigit [(uch >> 8) & 15]; 402 *enc->cur++ = PL_hexdigit [(uch >> 8) & 15];
221 *enc->cur++ = hexdigit [(uch >> 4) & 15]; 403 *enc->cur++ = PL_hexdigit [(uch >> 4) & 15];
222 *enc->cur++ = hexdigit [(uch >> 0) & 15]; 404 *enc->cur++ = PL_hexdigit [(uch >> 0) & 15];
223 } 405 }
224 406
225 str += clen; 407 str += clen;
226 } 408 }
227 else if (enc->json.flags & F_LATIN1) 409 else if (enc->json.flags & F_LATIN1)
… …
239 while (--clen); 421 while (--clen);
240 } 422 }
241 else 423 else
242 { 424 {
243 need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed 425 need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed
244 enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); 426 enc->cur = encode_utf8 (enc->cur, uch);
245 ++str; 427 ++str;
246 } 428 }
247 } 429 }
248 } 430 }
249 } 431 }
250 432
251 --len; 433 --len;
252 } 434 }
253} 435}
254 436
255inline void 437INLINE void
256encode_indent (enc_t *enc) 438encode_indent (enc_t *enc)
257{ 439{
258 if (enc->json.flags & F_INDENT) 440 if (enc->json.flags & F_INDENT)
259 { 441 {
260 int spaces = enc->indent * INDENT_STEP; 442 int spaces = enc->indent * INDENT_STEP;
… …
263 memset (enc->cur, ' ', spaces); 445 memset (enc->cur, ' ', spaces);
264 enc->cur += spaces; 446 enc->cur += spaces;
265 } 447 }
266} 448}
267 449
268inline void 450INLINE void
269encode_space (enc_t *enc) 451encode_space (enc_t *enc)
270{ 452{
271 need (enc, 1); 453 need (enc, 1);
272 encode_ch (enc, ' '); 454 encode_ch (enc, ' ');
273} 455}
274 456
275inline void 457INLINE void
276encode_nl (enc_t *enc) 458encode_nl (enc_t *enc)
277{ 459{
278 if (enc->json.flags & F_INDENT) 460 if (enc->json.flags & F_INDENT)
279 { 461 {
280 need (enc, 1); 462 need (enc, 1);
281 encode_ch (enc, '\n'); 463 encode_ch (enc, '\n');
282 } 464 }
283} 465}
284 466
285inline void 467INLINE void
286encode_comma (enc_t *enc) 468encode_comma (enc_t *enc)
287{ 469{
288 encode_ch (enc, ','); 470 encode_ch (enc, ',');
289 471
290 if (enc->json.flags & F_INDENT) 472 if (enc->json.flags & F_INDENT)
… …
298static void 480static void
299encode_av (enc_t *enc, AV *av) 481encode_av (enc_t *enc, AV *av)
300{ 482{
301 int i, len = av_len (av); 483 int i, len = av_len (av);
302 484
303 if (enc->indent >= enc->maxdepth) 485 if (enc->indent >= enc->json.max_depth)
304 croak ("data structure too deep (hit recursion limit)"); 486 croak (ERR_NESTING_EXCEEDED);
305 487
306 encode_ch (enc, '['); encode_nl (enc); 488 encode_ch (enc, '[');
307 ++enc->indent;
308 489
490 if (len >= 0)
491 {
492 encode_nl (enc); ++enc->indent;
493
309 for (i = 0; i <= len; ++i) 494 for (i = 0; i <= len; ++i)
310 { 495 {
496 SV **svp = av_fetch (av, i, 0);
497
311 encode_indent (enc); 498 encode_indent (enc);
312 encode_sv (enc, *av_fetch (av, i, 0));
313 499
500 if (svp)
501 encode_sv (enc, *svp);
502 else
503 encode_str (enc, "null", 4, 0);
504
314 if (i < len) 505 if (i < len)
315 encode_comma (enc); 506 encode_comma (enc);
316 } 507 }
317 508
509 encode_nl (enc); --enc->indent; encode_indent (enc);
510 }
511
318 encode_nl (enc); 512 encode_ch (enc, ']');
319
320 --enc->indent;
321 encode_indent (enc); encode_ch (enc, ']');
322} 513}
323 514
324static void 515static void
325encode_he (enc_t *enc, HE *he) 516encode_hk (enc_t *enc, HE *he)
326{ 517{
327 encode_ch (enc, '"'); 518 encode_ch (enc, '"');
328 519
329 if (HeKLEN (he) == HEf_SVKEY) 520 if (HeKLEN (he) == HEf_SVKEY)
330 { 521 {
331 SV *sv = HeSVKEY (he); 522 SV *sv = HeSVKEY (he);
332 STRLEN len; 523 STRLEN len;
333 char *str; 524 char *str;
334 525
335 SvGETMAGIC (sv); 526 SvGETMAGIC (sv);
336 str = SvPV (sv, len); 527 str = SvPV (sv, len);
337 528
338 encode_str (enc, str, len, SvUTF8 (sv)); 529 encode_str (enc, str, len, SvUTF8 (sv));
339 } 530 }
… …
343 encode_ch (enc, '"'); 534 encode_ch (enc, '"');
344 535
345 if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc); 536 if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc);
346 encode_ch (enc, ':'); 537 encode_ch (enc, ':');
347 if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc); 538 if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc);
348 encode_sv (enc, HeVAL (he));
349} 539}
350 540
351// compare hash entries, used when all keys are bytestrings 541// compare hash entries, used when all keys are bytestrings
352static int 542static int
353he_cmp_fast (const void *a_, const void *b_) 543he_cmp_fast (const void *a_, const void *b_)
… …
358 HE *b = *(HE **)b_; 548 HE *b = *(HE **)b_;
359 549
360 STRLEN la = HeKLEN (a); 550 STRLEN la = HeKLEN (a);
361 STRLEN lb = HeKLEN (b); 551 STRLEN lb = HeKLEN (b);
362 552
363 if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb))) 553 if (!(cmp = memcmp (HeKEY (b), HeKEY (a), lb < la ? lb : la)))
364 cmp = la - lb; 554 cmp = lb - la;
365 555
366 return cmp; 556 return cmp;
367} 557}
368 558
369// compare hash entries, used when some keys are sv's or utf-x 559// compare hash entries, used when some keys are sv's or utf-x
370static int 560static int
371he_cmp_slow (const void *a, const void *b) 561he_cmp_slow (const void *a, const void *b)
372{ 562{
373 return sv_cmp (HeSVKEY_force (*(HE **)a), HeSVKEY_force (*(HE **)b)); 563 return sv_cmp (HeSVKEY_force (*(HE **)b), HeSVKEY_force (*(HE **)a));
374} 564}
375 565
376static void 566static void
377encode_hv (enc_t *enc, HV *hv) 567encode_hv (enc_t *enc, HV *hv)
378{ 568{
379 int count, i; 569 HE *he;
380 570
381 if (enc->indent >= enc->maxdepth) 571 if (enc->indent >= enc->json.max_depth)
382 croak ("data structure too deep (hit recursion limit)"); 572 croak (ERR_NESTING_EXCEEDED);
383 573
384 encode_ch (enc, '{'); encode_nl (enc); ++enc->indent; 574 encode_ch (enc, '{');
385 575
386 if ((count = hv_iterinit (hv)))
387 {
388 // for canonical output we have to sort by keys first 576 // for canonical output we have to sort by keys first
389 // actually, this is mostly due to the stupid so-called 577 // actually, this is mostly due to the stupid so-called
390 // security workaround added somewhere in 5.8.x. 578 // security workaround added somewhere in 5.8.x
391 // that randomises hash orderings 579 // that randomises hash orderings
392 if (enc->json.flags & F_CANONICAL) 580 if (enc->json.flags & F_CANONICAL && !SvRMAGICAL (hv))
581 {
582 int count = hv_iterinit (hv);
583
584 if (SvMAGICAL (hv))
393 { 585 {
586 // need to count by iterating. could improve by dynamically building the vector below
587 // but I don't care for the speed of this special case.
588 // note also that we will run into undefined behaviour when the two iterations
589 // do not result in the same count, something I might care for in some later release.
590
591 count = 0;
592 while (hv_iternext (hv))
593 ++count;
594
595 hv_iterinit (hv);
596 }
597
598 if (count)
599 {
394 int fast = 1; 600 int i, fast = 1;
395 HE *he; 601 HE *hes_stack [STACK_HES];
396#if defined(__BORLANDC__) || defined(_MSC_VER) 602 HE **hes = hes_stack;
397 HE **hes = _alloca (count * sizeof (HE)); 603
398#else 604 // allocate larger arrays on the heap
399 HE *hes [count]; // if your compiler dies here, you need to enable C99 mode 605 if (count > STACK_HES)
400#endif 606 {
607 SV *sv = sv_2mortal (NEWSV (0, count * sizeof (*hes)));
608 hes = (HE **)SvPVX (sv);
609 }
401 610
402 i = 0; 611 i = 0;
403 while ((he = hv_iternext (hv))) 612 while ((he = hv_iternext (hv)))
404 { 613 {
405 hes [i++] = he; 614 hes [i++] = he;
… …
427 636
428 FREETMPS; 637 FREETMPS;
429 LEAVE; 638 LEAVE;
430 } 639 }
431 640
432 for (i = 0; i < count; ++i) 641 encode_nl (enc); ++enc->indent;
642
643 while (count--)
433 { 644 {
434 encode_indent (enc); 645 encode_indent (enc);
646 he = hes [count];
435 encode_he (enc, hes [i]); 647 encode_hk (enc, he);
648 encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
436 649
437 if (i < count - 1) 650 if (count)
438 encode_comma (enc); 651 encode_comma (enc);
439 } 652 }
440 653
441 encode_nl (enc); 654 encode_nl (enc); --enc->indent; encode_indent (enc);
442 } 655 }
656 }
443 else 657 else
658 {
659 if (hv_iterinit (hv) || SvMAGICAL (hv))
660 if ((he = hv_iternext (hv)))
444 { 661 {
445 HE *he = hv_iternext (hv); 662 encode_nl (enc); ++enc->indent;
446 663
447 for (;;) 664 for (;;)
448 { 665 {
449 encode_indent (enc); 666 encode_indent (enc);
450 encode_he (enc, he); 667 encode_hk (enc, he);
668 encode_sv (enc, expect_false (SvMAGICAL (hv)) ? hv_iterval (hv, he) : HeVAL (he));
451 669
452 if (!(he = hv_iternext (hv))) 670 if (!(he = hv_iternext (hv)))
453 break; 671 break;
454 672
455 encode_comma (enc); 673 encode_comma (enc);
456 } 674 }
457 675
458 encode_nl (enc); 676 encode_nl (enc); --enc->indent; encode_indent (enc);
459 } 677 }
460 } 678 }
461 679
462 --enc->indent; encode_indent (enc); encode_ch (enc, '}'); 680 encode_ch (enc, '}');
463} 681}
464 682
465// encode objects, arrays and special \0=false and \1=true values. 683// encode objects, arrays and special \0=false and \1=true values.
466static void 684static void
467encode_rv (enc_t *enc, SV *sv) 685encode_rv (enc_t *enc, SV *sv)
468{ 686{
469 svtype svt; 687 svtype svt;
688 GV *method;
470 689
471 SvGETMAGIC (sv); 690 SvGETMAGIC (sv);
472 svt = SvTYPE (sv); 691 svt = SvTYPE (sv);
473 692
474 if (expect_false (SvOBJECT (sv))) 693 if (expect_false (SvOBJECT (sv)))
475 { 694 {
476 if (SvSTASH (sv) == json_boolean_stash) 695 HV *boolean_stash = !JSON_SLOW || types_boolean_stash
696 ? types_boolean_stash
697 : gv_stashpv ("Types::Serialiser::Boolean", 1);
698 HV *stash = SvSTASH (sv);
699
700 if (stash == boolean_stash)
477 { 701 {
478 if (SvIV (sv)) 702 if (SvIV (sv))
479 encode_str (enc, "true", 4, 0); 703 encode_str (enc, "true", 4, 0);
480 else 704 else
481 encode_str (enc, "false", 5, 0); 705 encode_str (enc, "false", 5, 0);
482 } 706 }
707 else if ((enc->json.flags & F_ALLOW_TAGS) && (method = gv_fetchmethod_autoload (stash, "FREEZE", 0)))
708 {
709 int count;
710 dSP;
711
712 ENTER; SAVETMPS; PUSHMARK (SP);
713 EXTEND (SP, 2);
714 // we re-bless the reference to get overload and other niceties right
715 PUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
716 PUSHs (sv_json);
717
718 PUTBACK;
719 count = call_sv ((SV *)GvCV (method), G_ARRAY);
720 SPAGAIN;
721
722 // catch this surprisingly common error
723 if (SvROK (TOPs) && SvRV (TOPs) == sv)
724 croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
725
726 encode_ch (enc, '(');
727 encode_ch (enc, '"');
728 encode_str (enc, HvNAME (stash), HvNAMELEN (stash), HvNAMEUTF8 (stash));
729 encode_ch (enc, '"');
730 encode_ch (enc, ')');
731 encode_ch (enc, '[');
732
733 while (count)
734 {
735 encode_sv (enc, SP[1 - count--]);
736
737 if (count)
738 encode_ch (enc, ',');
739 }
740
741 encode_ch (enc, ']');
742
743 PUTBACK;
744
745 FREETMPS; LEAVE;
746 }
747 else if ((enc->json.flags & F_CONV_BLESSED) && (method = gv_fetchmethod_autoload (stash, "TO_JSON", 0)))
748 {
749 dSP;
750
751 ENTER; SAVETMPS; PUSHMARK (SP);
752 // we re-bless the reference to get overload and other niceties right
753 XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), stash));
754
755 // calling with G_SCALAR ensures that we always get a 1 return value
756 PUTBACK;
757 call_sv ((SV *)GvCV (method), G_SCALAR);
758 SPAGAIN;
759
760 // catch this surprisingly common error
761 if (SvROK (TOPs) && SvRV (TOPs) == sv)
762 croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
763
764 sv = POPs;
765 PUTBACK;
766
767 encode_sv (enc, sv);
768
769 FREETMPS; LEAVE;
770 }
771 else if (enc->json.flags & F_ALLOW_BLESSED)
772 encode_str (enc, "null", 4, 0);
483 else 773 else
484 {
485#if 0
486 if (0 && sv_derived_from (rv, "JSON::Literal"))
487 {
488 // not yet
489 }
490#endif
491 if (enc->json.flags & F_CONV_BLESSED)
492 {
493 // we re-bless the reference to get overload and other niceties right
494 GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 0);
495
496 if (to_json)
497 {
498 int count;
499 dSP;
500
501 ENTER; SAVETMPS; PUSHMARK (SP);
502 XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv)));
503
504 // calling with G_SCALAR ensures that we always get a 1 return value
505 PUTBACK;
506 call_sv ((SV *)GvCV (to_json), G_SCALAR);
507 SPAGAIN;
508
509 // catch this surprisingly common error
510 if (SvROK (TOPs) && SvRV (TOPs) == sv)
511 croak ("%s::TO_JSON method returned same object as was passed instead of a new one", HvNAME (SvSTASH (sv)));
512
513 sv = POPs;
514 PUTBACK;
515
516 encode_sv (enc, sv);
517
518 FREETMPS; LEAVE;
519 }
520 else if (enc->json.flags & F_ALLOW_BLESSED)
521 encode_str (enc, "null", 4, 0);
522 else
523 croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it",
524 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
525 }
526 else if (enc->json.flags & F_ALLOW_BLESSED)
527 encode_str (enc, "null", 4, 0);
528 else
529 croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled", 774 croak ("encountered object '%s', but neither allow_blessed, convert_blessed nor allow_tags settings are enabled (or TO_JSON/FREEZE method missing)",
530 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 775 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
531 }
532 } 776 }
533 else if (svt == SVt_PVHV) 777 else if (svt == SVt_PVHV)
534 encode_hv (enc, (HV *)sv); 778 encode_hv (enc, (HV *)sv);
535 else if (svt == SVt_PVAV) 779 else if (svt == SVt_PVAV)
536 encode_av (enc, (AV *)sv); 780 encode_av (enc, (AV *)sv);
… …
541 785
542 if (len == 1 && *pv == '1') 786 if (len == 1 && *pv == '1')
543 encode_str (enc, "true", 4, 0); 787 encode_str (enc, "true", 4, 0);
544 else if (len == 1 && *pv == '0') 788 else if (len == 1 && *pv == '0')
545 encode_str (enc, "false", 5, 0); 789 encode_str (enc, "false", 5, 0);
790 else if (enc->json.flags & F_ALLOW_UNKNOWN)
791 encode_str (enc, "null", 4, 0);
546 else 792 else
547 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", 793 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
548 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 794 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
549 } 795 }
796 else if (enc->json.flags & F_ALLOW_UNKNOWN)
797 encode_str (enc, "null", 4, 0);
550 else 798 else
551 croak ("encountered %s, but JSON can only represent references to arrays or hashes", 799 croak ("encountered %s, but JSON can only represent references to arrays or hashes",
552 SvPV_nolen (sv_2mortal (newRV_inc (sv)))); 800 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
553} 801}
554 802
… …
572 Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); 820 Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur);
573 enc->cur += strlen (enc->cur); 821 enc->cur += strlen (enc->cur);
574 } 822 }
575 else if (SvIOKp (sv)) 823 else if (SvIOKp (sv))
576 { 824 {
577 // we assume we can always read an IV as a UV 825 // we assume we can always read an IV as a UV and vice versa
578 if (SvUV (sv) & ~(UV)0x7fff) 826 // we assume two's complement
579 { 827 // we assume no aliasing issues in the union
580 // large integer, use the (rather slow) snprintf way. 828 if (SvIsUV (sv) ? SvUVX (sv) <= 59000
581 need (enc, sizeof (UV) * 3); 829 : SvIVX (sv) <= 59000 && SvIVX (sv) >= -59000)
582 enc->cur +=
583 SvIsUV(sv)
584 ? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv))
585 : snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv));
586 }
587 else
588 { 830 {
589 // optimise the "small number case" 831 // optimise the "small number case"
590 // code will likely be branchless and use only a single multiplication 832 // code will likely be branchless and use only a single multiplication
833 // works for numbers up to 59074
591 I32 i = SvIV (sv); 834 I32 i = SvIVX (sv);
592 U32 u; 835 U32 u;
593 char digit, nz = 0; 836 char digit, nz = 0;
594 837
595 need (enc, 6); 838 need (enc, 6);
596 839
… …
602 845
603 // now output digit by digit, each time masking out the integer part 846 // now output digit by digit, each time masking out the integer part
604 // and multiplying by 5 while moving the decimal point one to the right, 847 // and multiplying by 5 while moving the decimal point one to the right,
605 // resulting in a net multiplication by 10. 848 // resulting in a net multiplication by 10.
606 // we always write the digit to memory but conditionally increment 849 // we always write the digit to memory but conditionally increment
607 // the pointer, to ease the usage of conditional move instructions. 850 // the pointer, to enable the use of conditional move instructions.
608 digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5; 851 digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffffUL) * 5;
609 digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5; 852 digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffffUL) * 5;
610 digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5; 853 digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffffUL) * 5;
611 digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5; 854 digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffffUL) * 5;
612 digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0' 855 digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0'
613 } 856 }
857 else
858 {
859 // large integer, use the (rather slow) snprintf way.
860 need (enc, IVUV_MAXCHARS);
861 enc->cur +=
862 SvIsUV(sv)
863 ? snprintf (enc->cur, IVUV_MAXCHARS, "%"UVuf, (UV)SvUVX (sv))
864 : snprintf (enc->cur, IVUV_MAXCHARS, "%"IVdf, (IV)SvIVX (sv));
865 }
614 } 866 }
615 else if (SvROK (sv)) 867 else if (SvROK (sv))
616 encode_rv (enc, SvRV (sv)); 868 encode_rv (enc, SvRV (sv));
617 else if (!SvOK (sv)) 869 else if (!SvOK (sv) || enc->json.flags & F_ALLOW_UNKNOWN)
618 encode_str (enc, "null", 4, 0); 870 encode_str (enc, "null", 4, 0);
619 else 871 else
620 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this", 872 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, check your input data",
621 SvPV_nolen (sv), SvFLAGS (sv)); 873 SvPV_nolen (sv), (unsigned int)SvFLAGS (sv));
622} 874}
623 875
624static SV * 876static SV *
625encode_json (SV *scalar, JSON *json) 877encode_json (SV *scalar, JSON *json)
626{ 878{
… …
632 enc.json = *json; 884 enc.json = *json;
633 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); 885 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
634 enc.cur = SvPVX (enc.sv); 886 enc.cur = SvPVX (enc.sv);
635 enc.end = SvEND (enc.sv); 887 enc.end = SvEND (enc.sv);
636 enc.indent = 0; 888 enc.indent = 0;
637 enc.maxdepth = DEC_DEPTH (enc.json.flags); 889 enc.limit = enc.json.flags & F_ASCII ? 0x000080UL
890 : enc.json.flags & F_LATIN1 ? 0x000100UL
891 : 0x110000UL;
638 892
639 SvPOK_only (enc.sv); 893 SvPOK_only (enc.sv);
640 encode_sv (&enc, scalar); 894 encode_sv (&enc, scalar);
895 encode_nl (&enc);
641 896
642 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); 897 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
643 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings 898 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
644 899
645 if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8))) 900 if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8)))
… …
663 JSON json; 918 JSON json;
664 U32 depth; // recursion depth 919 U32 depth; // recursion depth
665 U32 maxdepth; // recursion depth limit 920 U32 maxdepth; // recursion depth limit
666} dec_t; 921} dec_t;
667 922
668inline void 923INLINE void
924decode_comment (dec_t *dec)
925{
926 // only '#'-style comments allowed a.t.m.
927
928 while (*dec->cur && *dec->cur != 0x0a && *dec->cur != 0x0d)
929 ++dec->cur;
930}
931
932INLINE void
669decode_ws (dec_t *dec) 933decode_ws (dec_t *dec)
670{ 934{
671 for (;;) 935 for (;;)
672 { 936 {
673 char ch = *dec->cur; 937 char ch = *dec->cur;
674 938
675 if (ch > 0x20 939 if (ch > 0x20)
940 {
941 if (expect_false (ch == '#'))
942 {
943 if (dec->json.flags & F_RELAXED)
944 decode_comment (dec);
945 else
946 break;
947 }
948 else
949 break;
950 }
676 || (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)) 951 else if (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)
677 break; 952 break; // parse error, but let higher level handle it, gives better error messages
678 953
679 ++dec->cur; 954 ++dec->cur;
680 } 955 }
681} 956}
682 957
… …
686 if (*dec->cur != ch) \ 961 if (*dec->cur != ch) \
687 ERR (# ch " expected"); \ 962 ERR (# ch " expected"); \
688 ++dec->cur; \ 963 ++dec->cur; \
689 SE 964 SE
690 965
691#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)") 966#define DEC_INC_DEPTH if (++dec->depth > dec->json.max_depth) ERR (ERR_NESTING_EXCEEDED)
692#define DEC_DEC_DEPTH --dec->depth 967#define DEC_DEC_DEPTH --dec->depth
693 968
694static SV *decode_sv (dec_t *dec); 969static SV *decode_sv (dec_t *dec);
695 970
696static signed char decode_hexdigit[256]; 971static signed char decode_hexdigit[256];
… …
788 1063
789 if (hi >= 0x80) 1064 if (hi >= 0x80)
790 { 1065 {
791 utf8 = 1; 1066 utf8 = 1;
792 1067
793 cur = (char *)uvuni_to_utf8_flags (cur, hi, 0); 1068 cur = encode_utf8 (cur, hi);
794 } 1069 }
795 else 1070 else
796 *cur++ = hi; 1071 *cur++ = hi;
797 } 1072 }
798 break; 1073 break;
… …
800 default: 1075 default:
801 --dec_cur; 1076 --dec_cur;
802 ERR ("illegal backslash escape sequence in string"); 1077 ERR ("illegal backslash escape sequence in string");
803 } 1078 }
804 } 1079 }
805 else if (expect_true (ch >= 0x20 && ch <= 0x7f)) 1080 else if (expect_true (ch >= 0x20 && ch < 0x80))
806 *cur++ = ch; 1081 *cur++ = ch;
807 else if (ch >= 0x80) 1082 else if (ch >= 0x80)
808 { 1083 {
809 STRLEN clen; 1084 STRLEN clen;
810 UV uch;
811 1085
812 --dec_cur; 1086 --dec_cur;
813 1087
814 uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen); 1088 decode_utf8 (dec_cur, dec->end - dec_cur, &clen);
815 if (clen == (STRLEN)-1) 1089 if (clen == (STRLEN)-1)
816 ERR ("malformed UTF-8 character in JSON string"); 1090 ERR ("malformed UTF-8 character in JSON string");
817 1091
818 do 1092 do
819 *cur++ = *dec_cur++; 1093 *cur++ = *dec_cur++;
… …
836 { 1110 {
837 STRLEN len = cur - buf; 1111 STRLEN len = cur - buf;
838 1112
839 if (sv) 1113 if (sv)
840 { 1114 {
841 SvGROW (sv, SvCUR (sv) + len + 1); 1115 STRLEN cur = SvCUR (sv);
1116
1117 if (SvLEN (sv) <= cur + len)
1118 SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
1119
842 memcpy (SvPVX (sv) + SvCUR (sv), buf, len); 1120 memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
843 SvCUR_set (sv, SvCUR (sv) + len); 1121 SvCUR_set (sv, SvCUR (sv) + len);
844 } 1122 }
845 else 1123 else
846 sv = newSVpvn (buf, len); 1124 sv = newSVpvn (buf, len);
… …
931 is_nv = 1; 1209 is_nv = 1;
932 } 1210 }
933 1211
934 if (!is_nv) 1212 if (!is_nv)
935 { 1213 {
1214 int len = dec->cur - start;
1215
936 // special case the rather common 1..4-digit-int case, assumes 32 bit ints or so 1216 // special case the rather common 1..5-digit-int case
937 if (*start == '-') 1217 if (*start == '-')
938 switch (dec->cur - start) 1218 switch (len)
939 { 1219 {
940 case 2: return newSViv (-( start [1] - '0' * 1)); 1220 case 2: return newSViv (-(IV)( start [1] - '0' * 1));
941 case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11)); 1221 case 3: return newSViv (-(IV)( start [1] * 10 + start [2] - '0' * 11));
942 case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111)); 1222 case 4: return newSViv (-(IV)( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111));
943 case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111)); 1223 case 5: return newSViv (-(IV)( start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111));
1224 case 6: return newSViv (-(IV)(start [1] * 10000 + start [2] * 1000 + start [3] * 100 + start [4] * 10 + start [5] - '0' * 11111));
944 } 1225 }
945 else 1226 else
946 switch (dec->cur - start) 1227 switch (len)
947 { 1228 {
948 case 1: return newSViv ( start [0] - '0' * 1); 1229 case 1: return newSViv ( start [0] - '0' * 1);
949 case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11); 1230 case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11);
950 case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111); 1231 case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111);
951 case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111); 1232 case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111);
1233 case 5: return newSViv ( start [0] * 10000 + start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 11111);
952 } 1234 }
953 1235
954 { 1236 {
955 UV uv; 1237 UV uv;
956 int numtype = grok_number (start, dec->cur - start, &uv); 1238 int numtype = grok_number (start, len, &uv);
957 if (numtype & IS_NUMBER_IN_UV) 1239 if (numtype & IS_NUMBER_IN_UV)
958 if (numtype & IS_NUMBER_NEG) 1240 if (numtype & IS_NUMBER_NEG)
959 { 1241 {
960 if (uv < (UV)IV_MIN) 1242 if (uv < (UV)IV_MIN)
961 return newSViv (-(IV)uv); 1243 return newSViv (-(IV)uv);
962 } 1244 }
963 else 1245 else
964 return newSVuv (uv); 1246 return newSVuv (uv);
965
966 // here would likely be the place for bigint support
967 } 1247 }
968 }
969 1248
970 // if we ever support bigint or bigfloat, this is the place for bigfloat 1249 len -= *start == '-' ? 1 : 0;
1250
1251 // does not fit into IV or UV, try NV
1252 if (len <= NV_DIG)
1253 // fits into NV without loss of precision
1254 return newSVnv (json_atof (start));
1255
1256 // everything else fails, convert it to a string
1257 return newSVpvn (start, dec->cur - start);
1258 }
1259
1260 // loss of precision here
971 return newSVnv (Atof (start)); 1261 return newSVnv (json_atof (start));
972 1262
973fail: 1263fail:
974 return 0; 1264 return 0;
975} 1265}
976 1266
… …
1000 if (*dec->cur == ']') 1290 if (*dec->cur == ']')
1001 { 1291 {
1002 ++dec->cur; 1292 ++dec->cur;
1003 break; 1293 break;
1004 } 1294 }
1005 1295
1006 if (*dec->cur != ',') 1296 if (*dec->cur != ',')
1007 ERR (", or ] expected while parsing array"); 1297 ERR (", or ] expected while parsing array");
1008 1298
1009 ++dec->cur; 1299 ++dec->cur;
1300
1301 decode_ws (dec);
1302
1303 if (*dec->cur == ']' && dec->json.flags & F_RELAXED)
1304 {
1305 ++dec->cur;
1306 break;
1307 }
1010 } 1308 }
1011 1309
1012 DEC_DEC_DEPTH; 1310 DEC_DEC_DEPTH;
1013 return newRV_noinc ((SV *)av); 1311 return newRV_noinc ((SV *)av);
1014 1312
… …
1030 if (*dec->cur == '}') 1328 if (*dec->cur == '}')
1031 ++dec->cur; 1329 ++dec->cur;
1032 else 1330 else
1033 for (;;) 1331 for (;;)
1034 { 1332 {
1035 decode_ws (dec); EXPECT_CH ('"'); 1333 EXPECT_CH ('"');
1036 1334
1037 // heuristic: assume that 1335 // heuristic: assume that
1038 // a) decode_str + hv_store_ent are abysmally slow. 1336 // a) decode_str + hv_store_ent are abysmally slow.
1039 // b) most hash keys are short, simple ascii text. 1337 // b) most hash keys are short, simple ascii text.
1040 // => try to "fast-match" such strings to avoid 1338 // => try to "fast-match" such strings to avoid
… …
1044 char *p = dec->cur; 1342 char *p = dec->cur;
1045 char *e = p + 24; // only try up to 24 bytes 1343 char *e = p + 24; // only try up to 24 bytes
1046 1344
1047 for (;;) 1345 for (;;)
1048 { 1346 {
1049 // the >= 0x80 is true on most architectures 1347 // the >= 0x80 is false on most architectures
1050 if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\') 1348 if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\')
1051 { 1349 {
1052 // slow path, back up and use decode_str 1350 // slow path, back up and use decode_str
1053 SV *key = decode_str (dec); 1351 SV *key = decode_str (dec);
1054 if (!key) 1352 if (!key)
1055 goto fail; 1353 goto fail;
1056 1354
1057 decode_ws (dec); EXPECT_CH (':'); 1355 decode_ws (dec); EXPECT_CH (':');
1058 1356
1357 decode_ws (dec);
1059 value = decode_sv (dec); 1358 value = decode_sv (dec);
1060 if (!value) 1359 if (!value)
1061 { 1360 {
1062 SvREFCNT_dec (key); 1361 SvREFCNT_dec (key);
1063 goto fail; 1362 goto fail;
… …
1075 int len = p - key; 1374 int len = p - key;
1076 dec->cur = p + 1; 1375 dec->cur = p + 1;
1077 1376
1078 decode_ws (dec); EXPECT_CH (':'); 1377 decode_ws (dec); EXPECT_CH (':');
1079 1378
1379 decode_ws (dec);
1080 value = decode_sv (dec); 1380 value = decode_sv (dec);
1081 if (!value) 1381 if (!value)
1082 goto fail; 1382 goto fail;
1083 1383
1084 hv_store (hv, key, len, value, 0); 1384 hv_store (hv, key, len, value, 0);
… …
1100 1400
1101 if (*dec->cur != ',') 1401 if (*dec->cur != ',')
1102 ERR (", or } expected while parsing object/hash"); 1402 ERR (", or } expected while parsing object/hash");
1103 1403
1104 ++dec->cur; 1404 ++dec->cur;
1405
1406 decode_ws (dec);
1407
1408 if (*dec->cur == '}' && dec->json.flags & F_RELAXED)
1409 {
1410 ++dec->cur;
1411 break;
1412 }
1105 } 1413 }
1106 1414
1107 DEC_DEC_DEPTH; 1415 DEC_DEC_DEPTH;
1108 sv = newRV_noinc ((SV *)hv); 1416 sv = newRV_noinc ((SV *)hv);
1109 1417
… …
1127 dSP; 1435 dSP;
1128 int count; 1436 int count;
1129 1437
1130 ENTER; SAVETMPS; PUSHMARK (SP); 1438 ENTER; SAVETMPS; PUSHMARK (SP);
1131 XPUSHs (HeVAL (he)); 1439 XPUSHs (HeVAL (he));
1440 sv_2mortal (sv);
1132 1441
1133 PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN; 1442 PUTBACK; count = call_sv (HeVAL (cb), G_ARRAY); SPAGAIN;
1134 1443
1135 if (count == 1) 1444 if (count == 1)
1136 { 1445 {
1137 sv = newSVsv (POPs); 1446 sv = newSVsv (POPs);
1138 FREETMPS; LEAVE; 1447 FREETMPS; LEAVE;
1139 return sv; 1448 return sv;
1140 } 1449 }
1141 1450
1451 SvREFCNT_inc (sv);
1142 FREETMPS; LEAVE; 1452 FREETMPS; LEAVE;
1143 } 1453 }
1144 } 1454 }
1145 1455
1146 if (dec->json.cb_object) 1456 if (dec->json.cb_object)
… …
1172 DEC_DEC_DEPTH; 1482 DEC_DEC_DEPTH;
1173 return 0; 1483 return 0;
1174} 1484}
1175 1485
1176static SV * 1486static SV *
1487decode_tag (dec_t *dec)
1488{
1489 SV *tag = 0;
1490 SV *val = 0;
1491
1492 if (!(dec->json.flags & F_ALLOW_TAGS))
1493 ERR ("malformed JSON string, neither array, object, number, string or atom");
1494
1495 ++dec->cur;
1496
1497 tag = decode_sv (dec);
1498 if (!tag)
1499 goto fail;
1500
1501 if (!SvPOK (tag))
1502 ERR ("malformed JSON string, (tag) must be a string");
1503
1504 if (*dec->cur != ')')
1505 ERR (") expected after tag");
1506
1507 ++dec->cur;
1508
1509 val = decode_sv (dec);
1510 if (!val)
1511 goto fail;
1512
1513 if (!SvROK (val) || SvTYPE (SvRV (val)) != SVt_PVAV)
1514 ERR ("malformed JSON string, tag value must be an array");
1515
1516 {
1517 AV *av = (AV *)SvRV (val);
1518 int i, len = av_len (av) + 1;
1519 HV *stash = gv_stashsv (tag, 0);
1520 SV *sv;
1521
1522 if (!stash)
1523 ERR ("cannot decode perl-object (package does not exist)");
1524
1525 GV *method = gv_fetchmethod_autoload (stash, "THAW", 0);
1526
1527 if (!method)
1528 ERR ("cannot decode perl-object (package does not have a THAW method)");
1529
1530 dSP;
1531
1532 ENTER; SAVETMPS; PUSHMARK (SP);
1533 EXTEND (SP, len + 2);
1534 // we re-bless the reference to get overload and other niceties right
1535 PUSHs (tag);
1536 PUSHs (sv_json);
1537
1538 for (i = 0; i < len; ++i)
1539 PUSHs (*av_fetch (av, i, 1));
1540
1541 PUTBACK;
1542 call_sv ((SV *)GvCV (method), G_SCALAR);
1543 SPAGAIN;
1544
1545 SvREFCNT_dec (tag);
1546 SvREFCNT_dec (val);
1547 sv = SvREFCNT_inc (POPs);
1548
1549 PUTBACK;
1550
1551 FREETMPS; LEAVE;
1552
1553 return sv;
1554 }
1555
1556fail:
1557 SvREFCNT_dec (tag);
1558 SvREFCNT_dec (val);
1559 return 0;
1560}
1561
1562static SV *
1177decode_sv (dec_t *dec) 1563decode_sv (dec_t *dec)
1178{ 1564{
1179 decode_ws (dec);
1180
1181 // the beauty of JSON: you need exactly one character lookahead 1565 // the beauty of JSON: you need exactly one character lookahead
1182 // to parse anything. 1566 // to parse everything.
1183 switch (*dec->cur) 1567 switch (*dec->cur)
1184 { 1568 {
1185 case '"': ++dec->cur; return decode_str (dec); 1569 case '"': ++dec->cur; return decode_str (dec);
1186 case '[': ++dec->cur; return decode_av (dec); 1570 case '[': ++dec->cur; return decode_av (dec);
1187 case '{': ++dec->cur; return decode_hv (dec); 1571 case '{': ++dec->cur; return decode_hv (dec);
1572 case '(': return decode_tag (dec);
1188 1573
1189 case '-': 1574 case '-':
1190 case '0': case '1': case '2': case '3': case '4': 1575 case '0': case '1': case '2': case '3': case '4':
1191 case '5': case '6': case '7': case '8': case '9': 1576 case '5': case '6': case '7': case '8': case '9':
1192 return decode_num (dec); 1577 return decode_num (dec);
1193 1578
1194 case 't': 1579 case 't':
1195 if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) 1580 if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4))
1196 { 1581 {
1197 dec->cur += 4; 1582 dec->cur += 4;
1198 return SvREFCNT_inc (json_true); 1583#if JSON_SLOW
1584 types_true = get_bool ("Types::Serialiser::true");
1585#endif
1586 return newSVsv (types_true);
1199 } 1587 }
1200 else 1588 else
1201 ERR ("'true' expected"); 1589 ERR ("'true' expected");
1202 1590
1203 break; 1591 break;
1204 1592
1205 case 'f': 1593 case 'f':
1206 if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) 1594 if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5))
1207 { 1595 {
1208 dec->cur += 5; 1596 dec->cur += 5;
1209 return SvREFCNT_inc (json_false); 1597#if JSON_SLOW
1598 types_false = get_bool ("Types::Serialiser::false");
1599#endif
1600 return newSVsv (types_false);
1210 } 1601 }
1211 else 1602 else
1212 ERR ("'false' expected"); 1603 ERR ("'false' expected");
1213 1604
1214 break; 1605 break;
… …
1223 ERR ("'null' expected"); 1614 ERR ("'null' expected");
1224 1615
1225 break; 1616 break;
1226 1617
1227 default: 1618 default:
1228 ERR ("malformed JSON string, neither array, object, number, string or atom"); 1619 ERR ("malformed JSON string, neither tag, array, object, number, string or atom");
1229 break; 1620 break;
1230 } 1621 }
1231 1622
1232fail: 1623fail:
1233 return 0; 1624 return 0;
1234} 1625}
1235 1626
1236static SV * 1627static SV *
1237decode_json (SV *string, JSON *json, UV *offset_return) 1628decode_json (SV *string, JSON *json, char **offset_return)
1238{ 1629{
1239 dec_t dec; 1630 dec_t dec;
1240 UV offset;
1241 SV *sv; 1631 SV *sv;
1242 1632
1633 /* work around bugs in 5.10 where manipulating magic values
1634 * makes perl ignore the magic in subsequent accesses.
1635 * also make a copy of non-PV values, to get them into a clean
1636 * state (SvPV should do that, but it's buggy, see below).
1637 */
1243 SvGETMAGIC (string); 1638 /*SvGETMAGIC (string);*/
1639 if (SvMAGICAL (string) || !SvPOK (string))
1640 string = sv_2mortal (newSVsv (string));
1641
1244 SvUPGRADE (string, SVt_PV); 1642 SvUPGRADE (string, SVt_PV);
1245 1643
1246 if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags)) 1644 /* work around a bug in perl 5.10, which causes SvCUR to fail an
1645 * assertion with -DDEBUGGING, although SvCUR is documented to
1646 * return the xpv_cur field which certainly exists after upgrading.
1647 * according to nicholas clark, calling SvPOK fixes this.
1648 * But it doesn't fix it, so try another workaround, call SvPV_nolen
1649 * and hope for the best.
1650 * Damnit, SvPV_nolen still trips over yet another assertion. This
1651 * assertion business is seriously broken, try yet another workaround
1652 * for the broken -DDEBUGGING.
1653 */
1654 {
1655#ifdef DEBUGGING
1656 STRLEN offset = SvOK (string) ? sv_len (string) : 0;
1657#else
1658 STRLEN offset = SvCUR (string);
1659#endif
1660
1661 if (offset > json->max_size && json->max_size)
1247 croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu", 1662 croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
1248 (unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags)); 1663 (unsigned long)SvCUR (string), (unsigned long)json->max_size);
1664 }
1249 1665
1250 if (json->flags & F_UTF8) 1666 if (DECODE_WANTS_OCTETS (json))
1251 sv_utf8_downgrade (string, 0); 1667 sv_utf8_downgrade (string, 0);
1252 else 1668 else
1253 sv_utf8_upgrade (string); 1669 sv_utf8_upgrade (string);
1254 1670
1255 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP 1671 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
1256 1672
1257 dec.json = *json; 1673 dec.json = *json;
1258 dec.cur = SvPVX (string); 1674 dec.cur = SvPVX (string);
1259 dec.end = SvEND (string); 1675 dec.end = SvEND (string);
1260 dec.err = 0; 1676 dec.err = 0;
1261 dec.depth = 0; 1677 dec.depth = 0;
1262 dec.maxdepth = DEC_DEPTH (dec.json.flags);
1263 1678
1264 if (dec.json.cb_object || dec.json.cb_sk_object) 1679 if (dec.json.cb_object || dec.json.cb_sk_object)
1265 dec.json.flags |= F_HOOK; 1680 dec.json.flags |= F_HOOK;
1266 1681
1267 *dec.end = 0; // this should basically be a nop, too, but make sure it's there 1682 *dec.end = 0; // this should basically be a nop, too, but make sure it's there
1683
1684 decode_ws (&dec);
1268 sv = decode_sv (&dec); 1685 sv = decode_sv (&dec);
1686
1687 if (offset_return)
1688 *offset_return = dec.cur;
1269 1689
1270 if (!(offset_return || !sv)) 1690 if (!(offset_return || !sv))
1271 { 1691 {
1272 // check for trailing garbage 1692 // check for trailing garbage
1273 decode_ws (&dec); 1693 decode_ws (&dec);
… …
1276 { 1696 {
1277 dec.err = "garbage after JSON object"; 1697 dec.err = "garbage after JSON object";
1278 SvREFCNT_dec (sv); 1698 SvREFCNT_dec (sv);
1279 sv = 0; 1699 sv = 0;
1280 } 1700 }
1281 }
1282
1283 if (offset_return || !sv)
1284 {
1285 offset = dec.json.flags & F_UTF8
1286 ? dec.cur - SvPVX (string)
1287 : utf8_distance (dec.cur, SvPVX (string));
1288
1289 if (offset_return)
1290 *offset_return = offset;
1291 } 1701 }
1292 1702
1293 if (!sv) 1703 if (!sv)
1294 { 1704 {
1295 SV *uni = sv_newmortal (); 1705 SV *uni = sv_newmortal ();
… …
1301 SAVEVPTR (PL_curcop); 1711 SAVEVPTR (PL_curcop);
1302 PL_curcop = &cop; 1712 PL_curcop = &cop;
1303 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); 1713 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1304 LEAVE; 1714 LEAVE;
1305 1715
1306 croak ("%s, at character offset %d [\"%s\"]", 1716 croak ("%s, at character offset %d (before \"%s\")",
1307 dec.err, 1717 dec.err,
1308 (int)offset, 1718 (int)ptr_to_index (string, dec.cur),
1309 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); 1719 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
1310 } 1720 }
1311 1721
1312 sv = sv_2mortal (sv); 1722 sv = sv_2mortal (sv);
1313 1723
1314 if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv)) 1724 if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv))
1315 croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)"); 1725 croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
1316 1726
1317 return sv; 1727 return sv;
1728}
1729
1730/////////////////////////////////////////////////////////////////////////////
1731// incremental parser
1732
1733static void
1734incr_parse (JSON *self)
1735{
1736 const char *p = SvPVX (self->incr_text) + self->incr_pos;
1737
1738 // the state machine here is a bit convoluted and could be simplified a lot
1739 // but this would make it slower, so...
1740
1741 for (;;)
1742 {
1743 //printf ("loop pod %d *p<%c><%s>, mode %d nest %d\n", p - SvPVX (self->incr_text), *p, p, self->incr_mode, self->incr_nest);//D
1744 switch (self->incr_mode)
1745 {
1746 // only used for initial whitespace skipping
1747 case INCR_M_WS:
1748 for (;;)
1749 {
1750 if (*p > 0x20)
1751 {
1752 if (*p == '#')
1753 {
1754 self->incr_mode = INCR_M_C0;
1755 goto incr_m_c;
1756 }
1757 else
1758 {
1759 self->incr_mode = INCR_M_JSON;
1760 goto incr_m_json;
1761 }
1762 }
1763 else if (!*p)
1764 goto interrupt;
1765
1766 ++p;
1767 }
1768
1769 // skip a single char inside a string (for \\-processing)
1770 case INCR_M_BS:
1771 if (!*p)
1772 goto interrupt;
1773
1774 ++p;
1775 self->incr_mode = INCR_M_STR;
1776 goto incr_m_str;
1777
1778 // inside #-style comments
1779 case INCR_M_C0:
1780 case INCR_M_C1:
1781 incr_m_c:
1782 for (;;)
1783 {
1784 if (*p == '\n')
1785 {
1786 self->incr_mode = self->incr_mode == INCR_M_C0 ? INCR_M_WS : INCR_M_JSON;
1787 break;
1788 }
1789 else if (!*p)
1790 goto interrupt;
1791
1792 ++p;
1793 }
1794
1795 break;
1796
1797 // inside a string
1798 case INCR_M_STR:
1799 incr_m_str:
1800 for (;;)
1801 {
1802 if (*p == '"')
1803 {
1804 ++p;
1805 self->incr_mode = INCR_M_JSON;
1806
1807 if (!self->incr_nest)
1808 goto interrupt;
1809
1810 goto incr_m_json;
1811 }
1812 else if (*p == '\\')
1813 {
1814 ++p; // "virtually" consumes character after \
1815
1816 if (!*p) // if at end of string we have to switch modes
1817 {
1818 self->incr_mode = INCR_M_BS;
1819 goto interrupt;
1820 }
1821 }
1822 else if (!*p)
1823 goto interrupt;
1824
1825 ++p;
1826 }
1827
1828 // after initial ws, outside string
1829 case INCR_M_JSON:
1830 incr_m_json:
1831 for (;;)
1832 {
1833 switch (*p++)
1834 {
1835 case 0:
1836 --p;
1837 goto interrupt;
1838
1839 case 0x09:
1840 case 0x0a:
1841 case 0x0d:
1842 case 0x20:
1843 if (!self->incr_nest)
1844 {
1845 --p; // do not eat the whitespace, let the next round do it
1846 goto interrupt;
1847 }
1848 break;
1849
1850 case '"':
1851 self->incr_mode = INCR_M_STR;
1852 goto incr_m_str;
1853
1854 case '[':
1855 case '{':
1856 case '(':
1857 if (++self->incr_nest > self->max_depth)
1858 croak (ERR_NESTING_EXCEEDED);
1859 break;
1860
1861 case ']':
1862 case '}':
1863 if (--self->incr_nest <= 0)
1864 goto interrupt;
1865 break;
1866
1867 case ')':
1868 --self->incr_nest;
1869 break;
1870
1871 case '#':
1872 self->incr_mode = INCR_M_C1;
1873 goto incr_m_c;
1874 }
1875 }
1876 }
1877
1878 modechange:
1879 ;
1880 }
1881
1882interrupt:
1883 self->incr_pos = p - SvPVX (self->incr_text);
1884 //printf ("interrupt<%.*s>\n", self->incr_pos, SvPVX(self->incr_text));//D
1885 //printf ("return pos %d mode %d nest %d\n", self->incr_pos, self->incr_mode, self->incr_nest);//D
1318} 1886}
1319 1887
1320///////////////////////////////////////////////////////////////////////////// 1888/////////////////////////////////////////////////////////////////////////////
1321// XS interface functions 1889// XS interface functions
1322 1890
… …
1331 i >= '0' && i <= '9' ? i - '0' 1899 i >= '0' && i <= '9' ? i - '0'
1332 : i >= 'a' && i <= 'f' ? i - 'a' + 10 1900 : i >= 'a' && i <= 'f' ? i - 'a' + 10
1333 : i >= 'A' && i <= 'F' ? i - 'A' + 10 1901 : i >= 'A' && i <= 'F' ? i - 'A' + 10
1334 : -1; 1902 : -1;
1335 1903
1336 json_stash = gv_stashpv ("JSON::XS" , 1); 1904 json_stash = gv_stashpv ("JSON::XS" , 1);
1337 json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1); 1905 types_boolean_stash = gv_stashpv ("Types::Serialiser::Boolean", 1);
1338 1906
1339 json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true ); 1907 types_true = get_bool ("Types::Serialiser::true");
1340 json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false); 1908 types_false = get_bool ("Types::Serialiser::false");
1909
1910 sv_json = newSVpv ("JSON", 0);
1911 SvREADONLY_on (sv_json);
1912
1913 CvNODEBUG_on (get_cv ("JSON::XS::incr_text", 0)); /* the debugger completely breaks lvalue subs */
1341} 1914}
1342 1915
1343PROTOTYPES: DISABLE 1916PROTOTYPES: DISABLE
1917
1918void CLONE (...)
1919 CODE:
1920 json_stash = 0;
1921 types_boolean_stash = 0;
1344 1922
1345void new (char *klass) 1923void new (char *klass)
1346 PPCODE: 1924 PPCODE:
1347{ 1925{
1348 SV *pv = NEWSV (0, sizeof (JSON)); 1926 SV *pv = NEWSV (0, sizeof (JSON));
1349 SvPOK_only (pv); 1927 SvPOK_only (pv);
1350 Zero (SvPVX (pv), 1, JSON); 1928 json_init ((JSON *)SvPVX (pv));
1351 ((JSON *)SvPVX (pv))->flags = F_DEFAULT; 1929 XPUSHs (sv_2mortal (sv_bless (
1352 XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), json_stash))); 1930 newRV_noinc (pv),
1931 strEQ (klass, "JSON::XS") ? JSON_STASH : gv_stashpv (klass, 1)
1932 )));
1353} 1933}
1354 1934
1355void ascii (JSON *self, int enable = 1) 1935void ascii (JSON *self, int enable = 1)
1356 ALIAS: 1936 ALIAS:
1357 ascii = F_ASCII 1937 ascii = F_ASCII
… …
1364 pretty = F_PRETTY 1944 pretty = F_PRETTY
1365 allow_nonref = F_ALLOW_NONREF 1945 allow_nonref = F_ALLOW_NONREF
1366 shrink = F_SHRINK 1946 shrink = F_SHRINK
1367 allow_blessed = F_ALLOW_BLESSED 1947 allow_blessed = F_ALLOW_BLESSED
1368 convert_blessed = F_CONV_BLESSED 1948 convert_blessed = F_CONV_BLESSED
1949 relaxed = F_RELAXED
1950 allow_unknown = F_ALLOW_UNKNOWN
1951 allow_tags = F_ALLOW_TAGS
1369 PPCODE: 1952 PPCODE:
1370{ 1953{
1371 if (enable) 1954 if (enable)
1372 self->flags |= ix; 1955 self->flags |= ix;
1373 else 1956 else
1374 self->flags &= ~ix; 1957 self->flags &= ~ix;
1375 1958
1376 XPUSHs (ST (0)); 1959 XPUSHs (ST (0));
1377} 1960}
1378 1961
1379void max_depth (JSON *self, UV max_depth = 0x80000000UL) 1962void get_ascii (JSON *self)
1963 ALIAS:
1964 get_ascii = F_ASCII
1965 get_latin1 = F_LATIN1
1966 get_utf8 = F_UTF8
1967 get_indent = F_INDENT
1968 get_canonical = F_CANONICAL
1969 get_space_before = F_SPACE_BEFORE
1970 get_space_after = F_SPACE_AFTER
1971 get_allow_nonref = F_ALLOW_NONREF
1972 get_shrink = F_SHRINK
1973 get_allow_blessed = F_ALLOW_BLESSED
1974 get_convert_blessed = F_CONV_BLESSED
1975 get_relaxed = F_RELAXED
1976 get_allow_unknown = F_ALLOW_UNKNOWN
1977 get_allow_tags = F_ALLOW_TAGS
1380 PPCODE: 1978 PPCODE:
1381{ 1979 XPUSHs (boolSV (self->flags & ix));
1382 UV log2 = 0;
1383 1980
1384 if (max_depth > 0x80000000UL) max_depth = 0x80000000UL; 1981void max_depth (JSON *self, U32 max_depth = 0x80000000UL)
1385 1982 PPCODE:
1386 while ((1UL << log2) < max_depth) 1983 self->max_depth = max_depth;
1387 ++log2;
1388
1389 self->flags = self->flags & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1390
1391 XPUSHs (ST (0)); 1984 XPUSHs (ST (0));
1392}
1393 1985
1986U32 get_max_depth (JSON *self)
1987 CODE:
1988 RETVAL = self->max_depth;
1989 OUTPUT:
1990 RETVAL
1991
1394void max_size (JSON *self, UV max_size = 0) 1992void max_size (JSON *self, U32 max_size = 0)
1395 PPCODE: 1993 PPCODE:
1396{ 1994 self->max_size = max_size;
1397 UV log2 = 0;
1398
1399 if (max_size > 0x80000000UL) max_size = 0x80000000UL;
1400 if (max_size == 1) max_size = 2;
1401
1402 while ((1UL << log2) < max_size)
1403 ++log2;
1404
1405 self->flags = self->flags & ~F_MAXSIZE | (log2 << S_MAXSIZE);
1406
1407 XPUSHs (ST (0)); 1995 XPUSHs (ST (0));
1408} 1996
1997int get_max_size (JSON *self)
1998 CODE:
1999 RETVAL = self->max_size;
2000 OUTPUT:
2001 RETVAL
1409 2002
1410void filter_json_object (JSON *self, SV *cb = &PL_sv_undef) 2003void filter_json_object (JSON *self, SV *cb = &PL_sv_undef)
1411 PPCODE: 2004 PPCODE:
1412{ 2005{
1413 SvREFCNT_dec (self->cb_object); 2006 SvREFCNT_dec (self->cb_object);
… …
1417} 2010}
1418 2011
1419void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef) 2012void filter_json_single_key_object (JSON *self, SV *key, SV *cb = &PL_sv_undef)
1420 PPCODE: 2013 PPCODE:
1421{ 2014{
1422 if (!self->cb_sk_object) 2015 if (!self->cb_sk_object)
1423 self->cb_sk_object = newHV (); 2016 self->cb_sk_object = newHV ();
1424 2017
1425 if (SvOK (cb)) 2018 if (SvOK (cb))
1426 hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0); 2019 hv_store_ent (self->cb_sk_object, key, newSVsv (cb), 0);
1427 else 2020 else
… …
1438 XPUSHs (ST (0)); 2031 XPUSHs (ST (0));
1439} 2032}
1440 2033
1441void encode (JSON *self, SV *scalar) 2034void encode (JSON *self, SV *scalar)
1442 PPCODE: 2035 PPCODE:
1443 XPUSHs (encode_json (scalar, self)); 2036 PUTBACK; scalar = encode_json (scalar, self); SPAGAIN;
2037 XPUSHs (scalar);
1444 2038
1445void decode (JSON *self, SV *jsonstr) 2039void decode (JSON *self, SV *jsonstr)
1446 PPCODE: 2040 PPCODE:
1447 XPUSHs (decode_json (jsonstr, self, 0)); 2041 PUTBACK; jsonstr = decode_json (jsonstr, self, 0); SPAGAIN;
2042 XPUSHs (jsonstr);
1448 2043
1449void decode_prefix (JSON *self, SV *jsonstr) 2044void decode_prefix (JSON *self, SV *jsonstr)
1450 PPCODE: 2045 PPCODE:
1451{ 2046{
1452 UV offset; 2047 SV *sv;
2048 char *offset;
2049 PUTBACK; sv = decode_json (jsonstr, self, &offset); SPAGAIN;
1453 EXTEND (SP, 2); 2050 EXTEND (SP, 2);
1454 PUSHs (decode_json (jsonstr, self, &offset)); 2051 PUSHs (sv);
1455 PUSHs (sv_2mortal (newSVuv (offset))); 2052 PUSHs (sv_2mortal (newSVuv (ptr_to_index (jsonstr, offset))));
2053}
2054
2055void incr_parse (JSON *self, SV *jsonstr = 0)
2056 PPCODE:
2057{
2058 if (!self->incr_text)
2059 self->incr_text = newSVpvn ("", 0);
2060
2061 /* if utf8-ness doesn't match the decoder, need to upgrade/downgrade */
2062 if (!DECODE_WANTS_OCTETS (self) == !SvUTF8 (self->incr_text))
2063 if (DECODE_WANTS_OCTETS (self))
2064 {
2065 if (self->incr_pos)
2066 self->incr_pos = utf8_length ((U8 *)SvPVX (self->incr_text),
2067 (U8 *)SvPVX (self->incr_text) + self->incr_pos);
2068
2069 sv_utf8_downgrade (self->incr_text, 0);
2070 }
2071 else
2072 {
2073 sv_utf8_upgrade (self->incr_text);
2074
2075 if (self->incr_pos)
2076 self->incr_pos = utf8_hop ((U8 *)SvPVX (self->incr_text), self->incr_pos)
2077 - (U8 *)SvPVX (self->incr_text);
2078 }
2079
2080 // append data, if any
2081 if (jsonstr)
2082 {
2083 /* make sure both strings have same encoding */
2084 if (SvUTF8 (jsonstr) != SvUTF8 (self->incr_text))
2085 if (SvUTF8 (jsonstr))
2086 sv_utf8_downgrade (jsonstr, 0);
2087 else
2088 sv_utf8_upgrade (jsonstr);
2089
2090 /* and then just blindly append */
2091 {
2092 STRLEN len;
2093 const char *str = SvPV (jsonstr, len);
2094 STRLEN cur = SvCUR (self->incr_text);
2095
2096 if (SvLEN (self->incr_text) <= cur + len)
2097 SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1);
2098
2099 Move (str, SvEND (self->incr_text), len, char);
2100 SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len);
2101 *SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there
2102 }
2103 }
2104
2105 if (GIMME_V != G_VOID)
2106 do
2107 {
2108 SV *sv;
2109 char *offset;
2110
2111 if (!INCR_DONE (self))
2112 {
2113 incr_parse (self);
2114
2115 if (self->incr_pos > self->max_size && self->max_size)
2116 croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu",
2117 (unsigned long)self->incr_pos, (unsigned long)self->max_size);
2118
2119 if (!INCR_DONE (self))
2120 {
2121 // as an optimisation, do not accumulate white space in the incr buffer
2122 if (self->incr_mode == INCR_M_WS && self->incr_pos)
2123 {
2124 self->incr_pos = 0;
2125 SvCUR_set (self->incr_text, 0);
2126 }
2127
2128 break;
2129 }
2130 }
2131
2132 PUTBACK; sv = decode_json (self->incr_text, self, &offset); SPAGAIN;
2133 XPUSHs (sv);
2134
2135 self->incr_pos -= offset - SvPVX (self->incr_text);
2136 self->incr_nest = 0;
2137 self->incr_mode = 0;
2138
2139 sv_chop (self->incr_text, offset);
2140 }
2141 while (GIMME_V == G_ARRAY);
2142}
2143
2144SV *incr_text (JSON *self)
2145 ATTRS: lvalue
2146 CODE:
2147{
2148 if (self->incr_pos)
2149 croak ("incr_text can not be called when the incremental parser already started parsing");
2150
2151 RETVAL = self->incr_text ? SvREFCNT_inc (self->incr_text) : &PL_sv_undef;
2152}
2153 OUTPUT:
2154 RETVAL
2155
2156void incr_skip (JSON *self)
2157 CODE:
2158{
2159 if (self->incr_pos)
2160 {
2161 sv_chop (self->incr_text, SvPV_nolen (self->incr_text) + self->incr_pos);
2162 self->incr_pos = 0;
2163 self->incr_nest = 0;
2164 self->incr_mode = 0;
2165 }
2166}
2167
2168void incr_reset (JSON *self)
2169 CODE:
2170{
2171 SvREFCNT_dec (self->incr_text);
2172 self->incr_text = 0;
2173 self->incr_pos = 0;
2174 self->incr_nest = 0;
2175 self->incr_mode = 0;
1456} 2176}
1457 2177
1458void DESTROY (JSON *self) 2178void DESTROY (JSON *self)
1459 CODE: 2179 CODE:
1460 SvREFCNT_dec (self->cb_sk_object); 2180 SvREFCNT_dec (self->cb_sk_object);
1461 SvREFCNT_dec (self->cb_object); 2181 SvREFCNT_dec (self->cb_object);
2182 SvREFCNT_dec (self->incr_text);
1462 2183
1463PROTOTYPES: ENABLE 2184PROTOTYPES: ENABLE
1464 2185
1465void to_json (SV *scalar) 2186void encode_json (SV *scalar)
1466 PPCODE: 2187 PPCODE:
1467{ 2188{
1468 JSON json = { F_DEFAULT | F_UTF8 }; 2189 JSON json;
1469 XPUSHs (encode_json (scalar, &json)); 2190 json_init (&json);
2191 json.flags |= F_UTF8;
2192 PUTBACK; scalar = encode_json (scalar, &json); SPAGAIN;
2193 XPUSHs (scalar);
1470} 2194}
1471 2195
1472void from_json (SV *jsonstr) 2196void decode_json (SV *jsonstr)
1473 PPCODE: 2197 PPCODE:
1474{ 2198{
1475 JSON json = { F_DEFAULT | F_UTF8 }; 2199 JSON json;
1476 XPUSHs (decode_json (jsonstr, &json, 0)); 2200 json_init (&json);
2201 json.flags |= F_UTF8;
2202 PUTBACK; jsonstr = decode_json (jsonstr, &json, 0); SPAGAIN;
2203 XPUSHs (jsonstr);
1477} 2204}
1478 2205

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