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Comparing JSON-XS/XS.xs (file contents):
Revision 1.3 by root, Thu Mar 22 18:10:29 2007 UTC vs.
Revision 1.27 by root, Mon Apr 9 05:09:57 2007 UTC

… …
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 9
10#if defined(__BORLANDC__) || defined(_MSC_VER)
11# define snprintf _snprintf // C compilers have this in stdio.h
12#endif
13
9#define F_ASCII 0x00000001 14#define F_ASCII 0x00000001UL
10#define F_UTF8 0x00000002 15#define F_UTF8 0x00000002UL
11#define F_INDENT 0x00000004 16#define F_INDENT 0x00000004UL
12#define F_CANONICAL 0x00000008 17#define F_CANONICAL 0x00000008UL
13#define F_SPACE_BEFORE 0x00000010 18#define F_SPACE_BEFORE 0x00000010UL
14#define F_SPACE_AFTER 0x00000020 19#define F_SPACE_AFTER 0x00000020UL
15#define F_JSON_RPC 0x00000040
16#define F_ALLOW_NONREF 0x00000080 20#define F_ALLOW_NONREF 0x00000080UL
21#define F_SHRINK 0x00000100UL
22#define F_MAXDEPTH 0xf8000000UL
23#define S_MAXDEPTH 27
24
25#define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH))
26
27// F_SELFCONVERT? <=> to_json/toJson
28// F_BLESSED? <=> { $__class__$ => }
17 29
18#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER 30#define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER
19#define F_DEFAULT 0 31#define F_DEFAULT (9UL << S_MAXDEPTH)
20 32
21#define INIT_SIZE 32 // initial scalar size to be allocated 33#define INIT_SIZE 32 // initial scalar size to be allocated
34#define INDENT_STEP 3 // spaces per indentation level
35
36#define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character
37#define SHORT_STRING_LEN 512 // special-case strings of up to this size
22 38
23#define SB do { 39#define SB do {
24#define SE } while (0) 40#define SE } while (0)
25 41
26static HV *json_stash; 42static HV *json_stash; // JSON::XS::
43
44/////////////////////////////////////////////////////////////////////////////
45// utility functions
46
47static UV *
48SvJSON (SV *sv)
49{
50 if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
51 croak ("object is not of type JSON::XS");
52
53 return &SvUVX (SvRV (sv));
54}
55
56static void
57shrink (SV *sv)
58{
59 sv_utf8_downgrade (sv, 1);
60 if (SvLEN (sv) > SvCUR (sv) + 1)
61 {
62#ifdef SvPV_shrink_to_cur
63 SvPV_shrink_to_cur (sv);
64#elif defined (SvPV_renew)
65 SvPV_renew (sv, SvCUR (sv) + 1);
66#endif
67 }
68}
69
70// decode an utf-8 character and return it, or (UV)-1 in
71// case of an error.
72// we special-case "safe" characters from U+80 .. U+7FF,
73// but use the very good perl function to parse anything else.
74// note that we never call this function for a ascii codepoints
75static UV
76decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen)
77{
78 if (s[0] > 0xdf || s[0] < 0xc2)
79 return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY);
80 else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf)
81 {
82 *clen = 2;
83 return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f);
84 }
85 else
86 {
87 *clen = (STRLEN)-1;
88 return (UV)-1;
89 }
90}
91
92/////////////////////////////////////////////////////////////////////////////
93// encoder
27 94
28// structure used for encoding JSON 95// structure used for encoding JSON
29typedef struct 96typedef struct
30{ 97{
31 char *cur; 98 char *cur; // SvPVX (sv) + current output position
32 STRLEN len; // SvLEN (sv)
33 char *end; // SvEND (sv) 99 char *end; // SvEND (sv)
34 SV *sv; 100 SV *sv; // result scalar
35 UV flags; 101 U32 flags; // F_*
36 int max_recurse; 102 U32 indent; // indentation level
37 int indent; 103 U32 maxdepth; // max. indentation/recursion level
38} enc_t; 104} enc_t;
39
40// structure used for decoding JSON
41typedef struct
42{
43 char *cur;
44 char *end;
45 char *err;
46 UV flags;
47} dec_t;
48
49static UV *
50SvJSON (SV *sv)
51{
52 if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash))
53 croak ("object is not of type JSON::XS");
54
55 return &SvUVX (SvRV (sv));
56}
57
58/////////////////////////////////////////////////////////////////////////////
59 105
60static void 106static void
61need (enc_t *enc, STRLEN len) 107need (enc_t *enc, STRLEN len)
62{ 108{
63 if (enc->cur + len >= enc->end) 109 if (enc->cur + len >= enc->end)
64 { 110 {
65 STRLEN cur = enc->cur - SvPVX (enc->sv); 111 STRLEN cur = enc->cur - SvPVX (enc->sv);
66 SvGROW (enc->sv, cur + len + 1); 112 SvGROW (enc->sv, cur + len + 1);
67 enc->cur = SvPVX (enc->sv) + cur; 113 enc->cur = SvPVX (enc->sv) + cur;
68 enc->end = SvEND (enc->sv); 114 enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1;
69 } 115 }
70} 116}
71 117
72static void 118static void
73encode_ch (enc_t *enc, char ch) 119encode_ch (enc_t *enc, char ch)
… …
79static void 125static void
80encode_str (enc_t *enc, char *str, STRLEN len, int is_utf8) 126encode_str (enc_t *enc, char *str, STRLEN len, int is_utf8)
81{ 127{
82 char *end = str + len; 128 char *end = str + len;
83 129
130 need (enc, len);
131
84 while (str < end) 132 while (str < end)
85 { 133 {
86 unsigned char ch = *(unsigned char *)str; 134 unsigned char ch = *(unsigned char *)str;
135
87 if (ch >= 0x20 && ch < 0x80) // most common case 136 if (ch >= 0x20 && ch < 0x80) // most common case
88 { 137 {
138 if (ch == '"') // but with slow exceptions
139 {
140 need (enc, len += 1);
141 *enc->cur++ = '\\';
142 *enc->cur++ = '"';
143 }
144 else if (ch == '\\')
145 {
146 need (enc, len += 1);
147 *enc->cur++ = '\\';
148 *enc->cur++ = '\\';
149 }
150 else
89 *enc->cur++ = ch; 151 *enc->cur++ = ch;
152
90 str++; 153 ++str;
91 } 154 }
92 else 155 else
93 { 156 {
94 STRLEN clen; 157 switch (ch)
95 UV uch;
96
97 if (is_utf8)
98 { 158 {
99 uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY); 159 case '\010': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break;
100 if (clen < 0) 160 case '\011': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break;
101 croak ("malformed UTF-8 character in string, cannot convert to JSON"); 161 case '\012': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break;
102 } 162 case '\014': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break;
103 else 163 case '\015': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break;
104 {
105 uch = ch;
106 clen = 1;
107 }
108 164
109 need (enc, len += 6); 165 default:
110
111 if (uch < 0xa0 || enc->flags & F_ASCII)
112 {
113 if (uch > 0xFFFFUL)
114 { 166 {
167 STRLEN clen;
168 UV uch;
169
170 if (is_utf8)
171 {
172 //uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY);
173 uch = decode_utf8 (str, end - str, &clen);
174 if (clen == (STRLEN)-1)
175 croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str);
176 }
177 else
178 {
179 uch = ch;
115 len += 6; 180 clen = 1;
181 }
182
183 if (uch > 0x10FFFFUL)
184 croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch);
185
186 if (uch < 0x80 || enc->flags & F_ASCII)
187 {
188 if (uch > 0xFFFFUL)
189 {
116 need (enc, len += 6); 190 need (enc, len += 11);
117 sprintf (enc->cur, "\\u%04x\\u%04x", 191 sprintf (enc->cur, "\\u%04x\\u%04x",
118 (uch - 0x10000) / 0x400 + 0xD800, 192 (int)((uch - 0x10000) / 0x400 + 0xD800),
119 (uch - 0x10000) % 0x400 + 0xDC00); 193 (int)((uch - 0x10000) % 0x400 + 0xDC00));
120 enc->cur += 12; 194 enc->cur += 12;
195 }
196 else
197 {
198 static char hexdigit [16] = "0123456789abcdef";
199 need (enc, len += 5);
200 *enc->cur++ = '\\';
201 *enc->cur++ = 'u';
202 *enc->cur++ = hexdigit [ uch >> 12 ];
203 *enc->cur++ = hexdigit [(uch >> 8) & 15];
204 *enc->cur++ = hexdigit [(uch >> 4) & 15];
205 *enc->cur++ = hexdigit [(uch >> 0) & 15];
206 }
207
208 str += clen;
121 } 209 }
210 else if (is_utf8)
211 {
212 need (enc, len += clen);
213 do
214 {
215 *enc->cur++ = *str++;
216 }
217 while (--clen);
218 }
122 else 219 else
123 { 220 {
124 sprintf (enc->cur, "\\u%04x", uch); 221 need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed
125 enc->cur += 6; 222 enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);
223 ++str;
224 }
126 } 225 }
127 } 226 }
128 else if (is_utf8)
129 {
130 memcpy (enc->cur, str, clen);
131 enc->cur += clen;
132 }
133 else
134 enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0);
135
136 str += clen;
137 } 227 }
138 228
139 --len; 229 --len;
140 } 230 }
141} 231}
142 232
143#define INDENT SB \ 233static void
234encode_indent (enc_t *enc)
235{
144 if (enc->flags & F_INDENT) \ 236 if (enc->flags & F_INDENT)
145 { \ 237 {
146 int i_; \ 238 int spaces = enc->indent * INDENT_STEP;
147 need (enc, enc->indent); \
148 for (i_ = enc->indent * 3; i_--; )\
149 encode_ch (enc, ' '); \
150 } \
151 SE
152 239
153#define SPACE SB need (enc, 1); encode_ch (enc, ' '); SE 240 need (enc, spaces);
154#define NL SB if (enc->flags & F_INDENT) { need (enc, 1); encode_ch (enc, '\n'); } SE 241 memset (enc->cur, ' ', spaces);
155#define COMMA SB \ 242 enc->cur += spaces;
243 }
244}
245
246static void
247encode_space (enc_t *enc)
248{
249 need (enc, 1);
156 encode_ch (enc, ','); \ 250 encode_ch (enc, ' ');
251}
252
253static void
254encode_nl (enc_t *enc)
255{
157 if (enc->flags & F_INDENT) \ 256 if (enc->flags & F_INDENT)
158 NL; \ 257 {
258 need (enc, 1);
259 encode_ch (enc, '\n');
260 }
261}
262
263static void
264encode_comma (enc_t *enc)
265{
266 encode_ch (enc, ',');
267
268 if (enc->flags & F_INDENT)
269 encode_nl (enc);
159 else if (enc->flags & F_SPACE_AFTER) \ 270 else if (enc->flags & F_SPACE_AFTER)
160 SPACE; \ 271 encode_space (enc);
161 SE 272}
162 273
163static void encode_sv (enc_t *enc, SV *sv); 274static void encode_sv (enc_t *enc, SV *sv);
164 275
165static void 276static void
166encode_av (enc_t *enc, AV *av) 277encode_av (enc_t *enc, AV *av)
167{ 278{
168 int i, len = av_len (av); 279 int i, len = av_len (av);
169 280
170 encode_ch (enc, '['); NL; 281 if (enc->indent >= enc->maxdepth)
282 croak ("data structure too deep (hit recursion limit)");
283
284 encode_ch (enc, '['); encode_nl (enc);
171 ++enc->indent; 285 ++enc->indent;
172 286
173 for (i = 0; i <= len; ++i) 287 for (i = 0; i <= len; ++i)
174 { 288 {
175 INDENT; 289 encode_indent (enc);
176 encode_sv (enc, *av_fetch (av, i, 0)); 290 encode_sv (enc, *av_fetch (av, i, 0));
177 291
178 if (i < len) 292 if (i < len)
179 COMMA; 293 encode_comma (enc);
180 } 294 }
181 295
182 NL; 296 encode_nl (enc);
183 297
184 --enc->indent; 298 --enc->indent;
185 INDENT; encode_ch (enc, ']'); 299 encode_indent (enc); encode_ch (enc, ']');
186} 300}
187 301
188static void 302static void
189encode_he (enc_t *enc, HE *he) 303encode_he (enc_t *enc, HE *he)
190{ 304{
… …
192 306
193 if (HeKLEN (he) == HEf_SVKEY) 307 if (HeKLEN (he) == HEf_SVKEY)
194 { 308 {
195 SV *sv = HeSVKEY (he); 309 SV *sv = HeSVKEY (he);
196 STRLEN len; 310 STRLEN len;
311 char *str;
312
313 SvGETMAGIC (sv);
197 char *str = SvPV (sv, len); 314 str = SvPV (sv, len);
198 315
199 encode_str (enc, str, len, SvUTF8 (sv)); 316 encode_str (enc, str, len, SvUTF8 (sv));
200 } 317 }
201 else 318 else
202 encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); 319 encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he));
203 320
204 encode_ch (enc, '"'); 321 encode_ch (enc, '"');
205 322
206 if (enc->flags & F_SPACE_BEFORE) SPACE; 323 if (enc->flags & F_SPACE_BEFORE) encode_space (enc);
207 encode_ch (enc, ':'); 324 encode_ch (enc, ':');
208 if (enc->flags & F_SPACE_AFTER ) SPACE; 325 if (enc->flags & F_SPACE_AFTER ) encode_space (enc);
209 encode_sv (enc, HeVAL (he)); 326 encode_sv (enc, HeVAL (he));
210} 327}
211 328
212// compare hash entries, used when all keys are bytestrings 329// compare hash entries, used when all keys are bytestrings
213static int 330static int
… …
219 HE *b = *(HE **)b_; 336 HE *b = *(HE **)b_;
220 337
221 STRLEN la = HeKLEN (a); 338 STRLEN la = HeKLEN (a);
222 STRLEN lb = HeKLEN (b); 339 STRLEN lb = HeKLEN (b);
223 340
224 if (!(cmp == memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb))) 341 if (!(cmp = memcmp (HeKEY (a), HeKEY (b), la < lb ? la : lb)))
225 cmp = la < lb ? -1 : la == lb ? 0 : 1; 342 cmp = la - lb;
226 343
227 return cmp; 344 return cmp;
228} 345}
229 346
230// compare hash entries, used when some keys are sv's or utf-x 347// compare hash entries, used when some keys are sv's or utf-x
… …
237static void 354static void
238encode_hv (enc_t *enc, HV *hv) 355encode_hv (enc_t *enc, HV *hv)
239{ 356{
240 int count, i; 357 int count, i;
241 358
359 if (enc->indent >= enc->maxdepth)
360 croak ("data structure too deep (hit recursion limit)");
361
242 encode_ch (enc, '{'); NL; ++enc->indent; 362 encode_ch (enc, '{'); encode_nl (enc); ++enc->indent;
243 363
244 if ((count = hv_iterinit (hv))) 364 if ((count = hv_iterinit (hv)))
245 { 365 {
246 // for canonical output we have to sort by keys first 366 // for canonical output we have to sort by keys first
247 // actually, this is mostly due to the stupid so-called 367 // actually, this is mostly due to the stupid so-called
248 // security workaround added somewhere in 5.8.x. 368 // security workaround added somewhere in 5.8.x.
249 // that randomises hash orderings 369 // that randomises hash orderings
250 if (enc->flags & F_CANONICAL) 370 if (enc->flags & F_CANONICAL)
251 { 371 {
252 HE *he, *hes [count]; 372 HE *he, *hes [count]; // if your compiler dies here, you need to enable C99 mode
253 int fast = 1; 373 int fast = 1;
254 374
255 i = 0; 375 i = 0;
256 while ((he = hv_iternext (hv))) 376 while ((he = hv_iternext (hv)))
257 { 377 {
… …
264 384
265 if (fast) 385 if (fast)
266 qsort (hes, count, sizeof (HE *), he_cmp_fast); 386 qsort (hes, count, sizeof (HE *), he_cmp_fast);
267 else 387 else
268 { 388 {
269 // hack to disable "use bytes" 389 // hack to forcefully disable "use bytes"
270 COP *oldcop = PL_curcop, cop; 390 COP cop = *PL_curcop;
271 cop.op_private = 0; 391 cop.op_private = 0;
392
393 ENTER;
394 SAVETMPS;
395
396 SAVEVPTR (PL_curcop);
272 PL_curcop = &cop; 397 PL_curcop = &cop;
273 398
274 SAVETMPS;
275 qsort (hes, count, sizeof (HE *), he_cmp_slow); 399 qsort (hes, count, sizeof (HE *), he_cmp_slow);
400
276 FREETMPS; 401 FREETMPS;
277 402 LEAVE;
278 PL_curcop = oldcop;
279 } 403 }
280 404
281 for (i = 0; i < count; ++i) 405 for (i = 0; i < count; ++i)
282 { 406 {
283 INDENT; 407 encode_indent (enc);
284 encode_he (enc, hes [i]); 408 encode_he (enc, hes [i]);
285 409
286 if (i < count - 1) 410 if (i < count - 1)
287 COMMA; 411 encode_comma (enc);
288 } 412 }
289 413
290 NL; 414 encode_nl (enc);
291 } 415 }
292 else 416 else
293 { 417 {
294 SV *sv;
295 HE *he = hv_iternext (hv); 418 HE *he = hv_iternext (hv);
296 419
297 for (;;) 420 for (;;)
298 { 421 {
299 INDENT; 422 encode_indent (enc);
300 encode_he (enc, he); 423 encode_he (enc, he);
301 424
302 if (!(he = hv_iternext (hv))) 425 if (!(he = hv_iternext (hv)))
303 break; 426 break;
304 427
305 COMMA; 428 encode_comma (enc);
306 } 429 }
307 430
308 NL; 431 encode_nl (enc);
309 } 432 }
310 } 433 }
311 434
312 --enc->indent; INDENT; encode_ch (enc, '}'); 435 --enc->indent; encode_indent (enc); encode_ch (enc, '}');
436}
437
438// encode objects, arrays and special \0=false and \1=true values.
439static void
440encode_rv (enc_t *enc, SV *sv)
441{
442 svtype svt;
443
444 SvGETMAGIC (sv);
445 svt = SvTYPE (sv);
446
447 if (svt == SVt_PVHV)
448 encode_hv (enc, (HV *)sv);
449 else if (svt == SVt_PVAV)
450 encode_av (enc, (AV *)sv);
451 else if (svt < SVt_PVAV)
452 {
453 if (SvNIOK (sv) && SvIV (sv) == 0)
454 encode_str (enc, "false", 5, 0);
455 else if (SvNIOK (sv) && SvIV (sv) == 1)
456 encode_str (enc, "true", 4, 0);
457 else
458 croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1",
459 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
460 }
461 else
462 croak ("encountered %s, but JSON can only represent references to arrays or hashes",
463 SvPV_nolen (sv_2mortal (newRV_inc (sv))));
313} 464}
314 465
315static void 466static void
316encode_sv (enc_t *enc, SV *sv) 467encode_sv (enc_t *enc, SV *sv)
317{ 468{
469 SvGETMAGIC (sv);
470
318 if (SvPOKp (sv)) 471 if (SvPOKp (sv))
319 { 472 {
320 STRLEN len; 473 STRLEN len;
321 char *str = SvPV (sv, len); 474 char *str = SvPV (sv, len);
322 encode_ch (enc, '"'); 475 encode_ch (enc, '"');
… …
336 SvIsUV(sv) 489 SvIsUV(sv)
337 ? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv)) 490 ? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv))
338 : snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv)); 491 : snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv));
339 } 492 }
340 else if (SvROK (sv)) 493 else if (SvROK (sv))
341 { 494 encode_rv (enc, SvRV (sv));
342 if (!--enc->max_recurse)
343 croak ("data structure too deep (hit recursion limit)");
344
345 sv = SvRV (sv);
346
347 switch (SvTYPE (sv))
348 {
349 case SVt_PVAV: encode_av (enc, (AV *)sv); break;
350 case SVt_PVHV: encode_hv (enc, (HV *)sv); break;
351
352 default:
353 croak ("JSON can only represent references to arrays or hashes");
354 }
355 }
356 else if (!SvOK (sv)) 495 else if (!SvOK (sv))
357 encode_str (enc, "null", 4, 0); 496 encode_str (enc, "null", 4, 0);
358 else 497 else
359 croak ("encountered perl type that JSON cannot handle"); 498 croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this",
499 SvPV_nolen (sv), SvFLAGS (sv));
360} 500}
361 501
362static SV * 502static SV *
363encode_json (SV *scalar, UV flags) 503encode_json (SV *scalar, U32 flags)
364{ 504{
505 enc_t enc;
506
365 if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) 507 if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar))
366 croak ("hash- or arraref required (not a simple scalar, use allow_nonref to allow this)"); 508 croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)");
367 509
368 enc_t enc;
369 enc.flags = flags; 510 enc.flags = flags;
370 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); 511 enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE));
371 enc.cur = SvPVX (enc.sv); 512 enc.cur = SvPVX (enc.sv);
372 enc.end = SvEND (enc.sv); 513 enc.end = SvEND (enc.sv);
373 enc.max_recurse = 0;
374 enc.indent = 0; 514 enc.indent = 0;
515 enc.maxdepth = DEC_DEPTH (flags);
375 516
376 SvPOK_only (enc.sv); 517 SvPOK_only (enc.sv);
377 encode_sv (&enc, scalar); 518 encode_sv (&enc, scalar);
378 519
379 if (!(flags & (F_ASCII | F_UTF8))) 520 if (!(flags & (F_ASCII | F_UTF8)))
380 SvUTF8_on (enc.sv); 521 SvUTF8_on (enc.sv);
381 522
382 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); 523 SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv));
524 *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings
525
526 if (enc.flags & F_SHRINK)
527 shrink (enc.sv);
528
383 return enc.sv; 529 return enc.sv;
384} 530}
385 531
386///////////////////////////////////////////////////////////////////////////// 532/////////////////////////////////////////////////////////////////////////////
533// decoder
387 534
388#define WS \ 535// structure used for decoding JSON
536typedef struct
537{
538 char *cur; // current parser pointer
539 char *end; // end of input string
540 const char *err; // parse error, if != 0
541 U32 flags; // F_*
542 U32 depth; // recursion depth
543 U32 maxdepth; // recursion depth limit
544} dec_t;
545
546static void
547decode_ws (dec_t *dec)
548{
389 for (;;) \ 549 for (;;)
390 { \ 550 {
391 char ch = *dec->cur; \ 551 char ch = *dec->cur;
552
392 if (ch > 0x20 \ 553 if (ch > 0x20
393 || (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09)) \ 554 || (ch != 0x20 && ch != 0x0a && ch != 0x0d && ch != 0x09))
394 break; \ 555 break;
556
395 ++dec->cur; \ 557 ++dec->cur;
396 } 558 }
559}
397 560
398#define ERR(reason) SB dec->err = reason; goto fail; SE 561#define ERR(reason) SB dec->err = reason; goto fail; SE
562
399#define EXPECT_CH(ch) SB \ 563#define EXPECT_CH(ch) SB \
400 if (*dec->cur != ch) \ 564 if (*dec->cur != ch) \
401 ERR (# ch " expected"); \ 565 ERR (# ch " expected"); \
402 ++dec->cur; \ 566 ++dec->cur; \
403 SE 567 SE
404 568
569#define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)")
570#define DEC_DEC_DEPTH --dec->depth
571
405static SV *decode_sv (dec_t *dec); 572static SV *decode_sv (dec_t *dec);
406
407#define APPEND_CH(ch) SB \
408 SvGROW (sv, cur + 1 + 1); \
409 SvPVX (sv)[cur++] = (ch); \
410 SE
411 573
412static signed char decode_hexdigit[256]; 574static signed char decode_hexdigit[256];
413 575
414static UV 576static UV
415decode_4hex (dec_t *dec) 577decode_4hex (dec_t *dec)
416{ 578{
417 signed char d1, d2, d3, d4; 579 signed char d1, d2, d3, d4;
580 unsigned char *cur = (unsigned char *)dec->cur;
418 581
419 d1 = decode_hexdigit [((unsigned char *)dec->cur) [0]];
420 if (d1 < 0) ERR ("four hexadecimal digits expected"); 582 d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected");
421 d2 = decode_hexdigit [((unsigned char *)dec->cur) [1]];
422 if (d2 < 0) ERR ("four hexadecimal digits expected"); 583 d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected");
423 d3 = decode_hexdigit [((unsigned char *)dec->cur) [2]];
424 if (d3 < 0) ERR ("four hexadecimal digits expected"); 584 d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected");
425 d4 = decode_hexdigit [((unsigned char *)dec->cur) [3]];
426 if (d4 < 0) ERR ("four hexadecimal digits expected"); 585 d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected");
427 586
428 dec->cur += 4; 587 dec->cur += 4;
429 588
430 return ((UV)d1) << 12 589 return ((UV)d1) << 12
431 | ((UV)d2) << 8 590 | ((UV)d2) << 8
… …
437} 596}
438 597
439static SV * 598static SV *
440decode_str (dec_t *dec) 599decode_str (dec_t *dec)
441{ 600{
442 SV *sv = NEWSV (0,2); 601 SV *sv = 0;
443 STRLEN cur = 0;
444 int utf8 = 0; 602 int utf8 = 0;
445 603
446 for (;;) 604 do
447 { 605 {
448 unsigned char ch = *(unsigned char *)dec->cur; 606 char buf [SHORT_STRING_LEN + UTF8_MAX_LEN];
607 char *cur = buf;
449 608
450 if (ch == '"') 609 do
451 break;
452 else if (ch == '\\')
453 { 610 {
454 switch (*++dec->cur) 611 unsigned char ch = *(unsigned char *)dec->cur++;
612
613 if (ch == '"')
455 { 614 {
456 case '\\': 615 --dec->cur;
457 case '/': 616 break;
458 case '"': APPEND_CH (*dec->cur++); break; 617 }
459 618 else if (ch == '\\')
460 case 'b': APPEND_CH ('\010'); ++dec->cur; break; 619 {
461 case 't': APPEND_CH ('\011'); ++dec->cur; break; 620 switch (*dec->cur)
462 case 'n': APPEND_CH ('\012'); ++dec->cur; break;
463 case 'f': APPEND_CH ('\014'); ++dec->cur; break;
464 case 'r': APPEND_CH ('\015'); ++dec->cur; break;
465
466 case 'u':
467 { 621 {
468 UV lo, hi; 622 case '\\':
469 ++dec->cur; 623 case '/':
624 case '"': *cur++ = *dec->cur++; break;
470 625
471 hi = decode_4hex (dec); 626 case 'b': ++dec->cur; *cur++ = '\010'; break;
472 if (hi == (UV)-1) 627 case 't': ++dec->cur; *cur++ = '\011'; break;
473 goto fail; 628 case 'n': ++dec->cur; *cur++ = '\012'; break;
629 case 'f': ++dec->cur; *cur++ = '\014'; break;
630 case 'r': ++dec->cur; *cur++ = '\015'; break;
474 631
475 // possibly a surrogate pair 632 case 'u':
476 if (hi >= 0xd800 && hi < 0xdc00)
477 { 633 {
478 if (dec->cur [0] != '\\' || dec->cur [1] != 'u') 634 UV lo, hi;
479 ERR ("illegal surrogate character");
480
481 dec->cur += 2; 635 ++dec->cur;
482 636
483 lo = decode_4hex (dec); 637 hi = decode_4hex (dec);
484 if (lo == (UV)-1) 638 if (hi == (UV)-1)
485 goto fail; 639 goto fail;
486 640
641 // possibly a surrogate pair
642 if (hi >= 0xd800)
643 if (hi < 0xdc00)
644 {
645 if (dec->cur [0] != '\\' || dec->cur [1] != 'u')
646 ERR ("missing low surrogate character in surrogate pair");
647
648 dec->cur += 2;
649
650 lo = decode_4hex (dec);
651 if (lo == (UV)-1)
652 goto fail;
653
487 if (lo < 0xdc00 || lo >= 0xe000) 654 if (lo < 0xdc00 || lo >= 0xe000)
488 ERR ("surrogate pair expected"); 655 ERR ("surrogate pair expected");
489 656
490 hi = (hi - 0xD800) * 0x400 + (lo - 0xDC00) + 0x10000; 657 hi = (hi - 0xD800) * 0x400 + (lo - 0xDC00) + 0x10000;
658 }
659 else if (hi < 0xe000)
660 ERR ("missing high surrogate character in surrogate pair");
661
662 if (hi >= 0x80)
663 {
664 utf8 = 1;
665
666 cur = (char *)uvuni_to_utf8_flags (cur, hi, 0);
667 }
668 else
669 *cur++ = hi;
491 } 670 }
492 else if (lo >= 0xdc00 && lo < 0xe000)
493 ERR ("illegal surrogate character");
494
495 if (hi >= 0x80)
496 { 671 break;
497 utf8 = 1;
498 672
499 SvGROW (sv, cur + 4 + 1); // at most 4 bytes for 21 bits
500 cur = (char *)uvuni_to_utf8_flags (SvPVX (sv) + cur, hi, 0) - SvPVX (sv);
501 }
502 else 673 default:
503 APPEND_CH (hi); 674 --dec->cur;
675 ERR ("illegal backslash escape sequence in string");
504 } 676 }
677 }
678 else if (ch >= 0x20 && ch <= 0x7f)
679 *cur++ = ch;
680 else if (ch >= 0x80)
681 {
682 STRLEN clen;
683 UV uch;
684
685 --dec->cur;
686
687 uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen);
688 if (clen == (STRLEN)-1)
689 ERR ("malformed UTF-8 character in JSON string");
690
691 do
692 *cur++ = *dec->cur++;
693 while (--clen);
694
695 utf8 = 1;
696 }
697 else
698 {
699 --dec->cur;
700
701 if (!ch)
702 ERR ("unexpected end of string while parsing JSON string");
505 break; 703 else
704 ERR ("invalid character encountered while parsing JSON string");
506 } 705 }
507 } 706 }
508 else if (ch >= 0x20 && ch <= 0x7f) 707 while (cur < buf + SHORT_STRING_LEN);
509 APPEND_CH (*dec->cur++); 708
510 else if (ch >= 0x80) 709 {
710 STRLEN len = cur - buf;
711
712 if (sv)
511 { 713 {
512 STRLEN clen; 714 SvGROW (sv, SvCUR (sv) + len + 1);
513 UV uch = utf8n_to_uvuni (dec->cur, dec->end - dec->cur, &clen, UTF8_CHECK_ONLY); 715 memcpy (SvPVX (sv) + SvCUR (sv), buf, len);
514 if (clen < 0) 716 SvCUR_set (sv, SvCUR (sv) + len);
515 ERR ("malformed UTF-8 character in string, cannot convert to JSON");
516
517 SvGROW (sv, cur + clen + 1); // at most 4 bytes for 21 bits
518 memcpy (SvPVX (sv) + cur, dec->cur, clen);
519 dec->cur += clen;
520 } 717 }
521 else 718 else
522 ERR ("invalid character encountered"); 719 sv = newSVpvn (buf, len);
523 } 720 }
721 }
722 while (*dec->cur != '"');
524 723
525 ++dec->cur; 724 ++dec->cur;
526 725
726 if (sv)
727 {
527 SvPOK_only (sv); 728 SvPOK_only (sv);
528
529 SvCUR_set (sv, cur);
530 *SvEND (sv) = 0; 729 *SvEND (sv) = 0;
531 730
532 if (utf8) 731 if (utf8)
533 SvUTF8_on (sv); 732 SvUTF8_on (sv);
733 }
734 else
735 sv = newSVpvn ("", 0);
534 736
535 return sv; 737 return sv;
536 738
537fail: 739fail:
538 SvREFCNT_dec (sv);
539 return 0; 740 return 0;
540} 741}
541 742
542static SV * 743static SV *
543decode_num (dec_t *dec) 744decode_num (dec_t *dec)
… …
553 { 754 {
554 ++dec->cur; 755 ++dec->cur;
555 if (*dec->cur >= '0' && *dec->cur <= '9') 756 if (*dec->cur >= '0' && *dec->cur <= '9')
556 ERR ("malformed number (leading zero must not be followed by another digit)"); 757 ERR ("malformed number (leading zero must not be followed by another digit)");
557 } 758 }
558 759 else if (*dec->cur < '0' || *dec->cur > '9')
559 // int 760 ERR ("malformed number (no digits after initial minus)");
761 else
762 do
763 {
764 ++dec->cur;
765 }
560 while (*dec->cur >= '0' && *dec->cur <= '9') 766 while (*dec->cur >= '0' && *dec->cur <= '9');
561 ++dec->cur;
562 767
563 // [frac] 768 // [frac]
564 if (*dec->cur == '.') 769 if (*dec->cur == '.')
565 { 770 {
566 is_nv = 1; 771 ++dec->cur;
772
773 if (*dec->cur < '0' || *dec->cur > '9')
774 ERR ("malformed number (no digits after decimal point)");
567 775
568 do 776 do
569 { 777 {
570 ++dec->cur; 778 ++dec->cur;
571 } 779 }
572 while (*dec->cur >= '0' && *dec->cur <= '9'); 780 while (*dec->cur >= '0' && *dec->cur <= '9');
781
782 is_nv = 1;
573 } 783 }
574 784
575 // [exp] 785 // [exp]
576 if (*dec->cur == 'e' || *dec->cur == 'E') 786 if (*dec->cur == 'e' || *dec->cur == 'E')
577 { 787 {
578 is_nv = 1;
579
580 ++dec->cur; 788 ++dec->cur;
789
581 if (*dec->cur == '-' || *dec->cur == '+') 790 if (*dec->cur == '-' || *dec->cur == '+')
582 ++dec->cur; 791 ++dec->cur;
583 792
793 if (*dec->cur < '0' || *dec->cur > '9')
794 ERR ("malformed number (no digits after exp sign)");
795
796 do
797 {
798 ++dec->cur;
799 }
584 while (*dec->cur >= '0' && *dec->cur <= '9') 800 while (*dec->cur >= '0' && *dec->cur <= '9');
585 ++dec->cur; 801
802 is_nv = 1;
586 } 803 }
587 804
588 if (!is_nv) 805 if (!is_nv)
589 { 806 {
590 UV uv; 807 UV uv;
… …
608static SV * 825static SV *
609decode_av (dec_t *dec) 826decode_av (dec_t *dec)
610{ 827{
611 AV *av = newAV (); 828 AV *av = newAV ();
612 829
830 DEC_INC_DEPTH;
831 decode_ws (dec);
832
833 if (*dec->cur == ']')
834 ++dec->cur;
835 else
613 for (;;) 836 for (;;)
614 { 837 {
615 SV *value; 838 SV *value;
616 839
617 value = decode_sv (dec); 840 value = decode_sv (dec);
618 if (!value) 841 if (!value)
619 goto fail; 842 goto fail;
620 843
621 av_push (av, value); 844 av_push (av, value);
622 845
623 WS; 846 decode_ws (dec);
624 847
625 if (*dec->cur == ']') 848 if (*dec->cur == ']')
626 { 849 {
627 ++dec->cur; 850 ++dec->cur;
628 break; 851 break;
852 }
629 } 853
630
631 if (*dec->cur != ',') 854 if (*dec->cur != ',')
632 ERR (", or ] expected while parsing array"); 855 ERR (", or ] expected while parsing array");
633 856
634 ++dec->cur; 857 ++dec->cur;
635 } 858 }
636 859
860 DEC_DEC_DEPTH;
637 return newRV_noinc ((SV *)av); 861 return newRV_noinc ((SV *)av);
638 862
639fail: 863fail:
640 SvREFCNT_dec (av); 864 SvREFCNT_dec (av);
865 DEC_DEC_DEPTH;
641 return 0; 866 return 0;
642} 867}
643 868
644static SV * 869static SV *
645decode_hv (dec_t *dec) 870decode_hv (dec_t *dec)
646{ 871{
647 HV *hv = newHV (); 872 HV *hv = newHV ();
648 873
874 DEC_INC_DEPTH;
875 decode_ws (dec);
876
877 if (*dec->cur == '}')
878 ++dec->cur;
879 else
649 for (;;) 880 for (;;)
650 { 881 {
651 SV *key, *value; 882 SV *key, *value;
652 883
653 WS; EXPECT_CH ('"'); 884 decode_ws (dec); EXPECT_CH ('"');
654 885
655 key = decode_str (dec); 886 key = decode_str (dec);
656 if (!key) 887 if (!key)
657 goto fail;
658
659 WS; EXPECT_CH (':');
660
661 value = decode_sv (dec);
662 if (!value)
663 {
664 SvREFCNT_dec (key);
665 goto fail; 888 goto fail;
889
890 decode_ws (dec); EXPECT_CH (':');
891
892 value = decode_sv (dec);
893 if (!value)
894 {
895 SvREFCNT_dec (key);
896 goto fail;
666 } 897 }
667 898
668 //TODO: optimise
669 hv_store_ent (hv, key, value, 0); 899 hv_store_ent (hv, key, value, 0);
900 SvREFCNT_dec (key);
670 901
671 WS; 902 decode_ws (dec);
672 903
673 if (*dec->cur == '}') 904 if (*dec->cur == '}')
674 { 905 {
675 ++dec->cur; 906 ++dec->cur;
676 break; 907 break;
677 } 908 }
678 909
679 if (*dec->cur != ',') 910 if (*dec->cur != ',')
680 ERR (", or } expected while parsing object/hash"); 911 ERR (", or } expected while parsing object/hash");
681 912
682 ++dec->cur; 913 ++dec->cur;
683 } 914 }
684 915
916 DEC_DEC_DEPTH;
685 return newRV_noinc ((SV *)hv); 917 return newRV_noinc ((SV *)hv);
686 918
687fail: 919fail:
688 SvREFCNT_dec (hv); 920 SvREFCNT_dec (hv);
921 DEC_DEC_DEPTH;
689 return 0; 922 return 0;
690} 923}
691 924
692static SV * 925static SV *
693decode_sv (dec_t *dec) 926decode_sv (dec_t *dec)
694{ 927{
695 WS; 928 decode_ws (dec);
696 switch (*dec->cur) 929 switch (*dec->cur)
697 { 930 {
698 case '"': ++dec->cur; return decode_str (dec); 931 case '"': ++dec->cur; return decode_str (dec);
699 case '[': ++dec->cur; return decode_av (dec); 932 case '[': ++dec->cur; return decode_av (dec);
700 case '{': ++dec->cur; return decode_hv (dec); 933 case '{': ++dec->cur; return decode_hv (dec);
… …
728 961
729 case 'n': 962 case 'n':
730 if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4)) 963 if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "null", 4))
731 { 964 {
732 dec->cur += 4; 965 dec->cur += 4;
733 return newSViv (1); 966 return newSVsv (&PL_sv_undef);
734 } 967 }
735 else 968 else
736 ERR ("'null' expected"); 969 ERR ("'null' expected");
737 970
738 break; 971 break;
739 972
740 default: 973 default:
741 ERR ("malformed json string"); 974 ERR ("malformed JSON string, neither array, object, number, string or atom");
742 break; 975 break;
743 } 976 }
744 977
745fail: 978fail:
746 return 0; 979 return 0;
747} 980}
748 981
749static SV * 982static SV *
750decode_json (SV *string, UV flags) 983decode_json (SV *string, U32 flags)
751{ 984{
985 dec_t dec;
752 SV *sv; 986 SV *sv;
753 987
988 SvUPGRADE (string, SVt_PV);
989
754 if (!(flags & F_UTF8)) 990 if (flags & F_UTF8)
991 sv_utf8_downgrade (string, 0);
992 else
755 sv_utf8_upgrade (string); 993 sv_utf8_upgrade (string);
756 994
757 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP 995 SvGROW (string, SvCUR (string) + 1); // should basically be a NOP
758 996
759 dec_t dec;
760 dec.flags = flags; 997 dec.flags = flags;
761 dec.cur = SvPVX (string); 998 dec.cur = SvPVX (string);
762 dec.end = SvEND (string); 999 dec.end = SvEND (string);
763 dec.err = 0; 1000 dec.err = 0;
1001 dec.depth = 0;
1002 dec.maxdepth = DEC_DEPTH (dec.flags);
764 1003
765 *dec.end = 1; // invalid anywhere 1004 *dec.end = 0; // this should basically be a nop, too, but make sure its there
766 sv = decode_sv (&dec); 1005 sv = decode_sv (&dec);
767 *dec.end = 0;
768 1006
769 if (!sv) 1007 if (!sv)
770 { 1008 {
1009 IV offset = dec.flags & F_UTF8
1010 ? dec.cur - SvPVX (string)
771 IV offset = utf8_distance (dec.cur, SvPVX (string)); 1011 : utf8_distance (dec.cur, SvPVX (string));
772 SV *uni = sv_newmortal (); 1012 SV *uni = sv_newmortal ();
773 1013
1014 // horrible hack to silence warning inside pv_uni_display
1015 COP cop = *PL_curcop;
1016 cop.cop_warnings = pWARN_NONE;
1017 ENTER;
1018 SAVEVPTR (PL_curcop);
1019 PL_curcop = &cop;
774 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); 1020 pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ);
1021 LEAVE;
1022
775 croak ("%s, at character %d (%s)", 1023 croak ("%s, at character offset %d [\"%s\"]",
776 dec.err, 1024 dec.err,
777 (int)offset, 1025 (int)offset,
778 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); 1026 dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)");
779 } 1027 }
780 1028
781 sv = sv_2mortal (sv); 1029 sv = sv_2mortal (sv);
782 1030
783 if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv)) 1031 if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv))
784 croak ("JSON object or array expected (but number, string, true, false or null found, use allow_nonref to allow this)"); 1032 croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)");
785 1033
786 return sv; 1034 return sv;
787} 1035}
788 1036
1037/////////////////////////////////////////////////////////////////////////////
1038// XS interface functions
1039
789MODULE = JSON::XS PACKAGE = JSON::XS 1040MODULE = JSON::XS PACKAGE = JSON::XS
790 1041
791BOOT: 1042BOOT:
792{ 1043{
793 int i; 1044 int i;
794 1045
795 memset (decode_hexdigit, 0xff, 256); 1046 memset (decode_hexdigit, 0xff, 256);
1047
796 for (i = 10; i--; ) 1048 for (i = 0; i < 256; ++i)
797 decode_hexdigit ['0' + i] = i; 1049 decode_hexdigit [i] =
798 1050 i >= '0' && i <= '9' ? i - '0'
799 for (i = 6; --i; ) 1051 : i >= 'a' && i <= 'f' ? i - 'a' + 10
800 { 1052 : i >= 'A' && i <= 'F' ? i - 'A' + 10
801 decode_hexdigit ['a' + i] = 10 + i; 1053 : -1;
802 decode_hexdigit ['A' + i] = 10 + i;
803 }
804 1054
805 json_stash = gv_stashpv ("JSON::XS", 1); 1055 json_stash = gv_stashpv ("JSON::XS", 1);
806} 1056}
1057
1058PROTOTYPES: DISABLE
807 1059
808SV *new (char *dummy) 1060SV *new (char *dummy)
809 CODE: 1061 CODE:
810 RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash); 1062 RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash);
811 OUTPUT: 1063 OUTPUT:
812 RETVAL 1064 RETVAL
813 1065
814SV *ascii (SV *self, int enable) 1066SV *ascii (SV *self, int enable = 1)
815 ALIAS: 1067 ALIAS:
816 ascii = F_ASCII 1068 ascii = F_ASCII
817 utf8 = F_UTF8 1069 utf8 = F_UTF8
818 indent = F_INDENT 1070 indent = F_INDENT
819 canonical = F_CANONICAL 1071 canonical = F_CANONICAL
820 space_before = F_SPACE_BEFORE 1072 space_before = F_SPACE_BEFORE
821 space_after = F_SPACE_AFTER 1073 space_after = F_SPACE_AFTER
822 json_rpc = F_JSON_RPC
823 pretty = F_PRETTY 1074 pretty = F_PRETTY
824 allow_nonref = F_ALLOW_NONREF 1075 allow_nonref = F_ALLOW_NONREF
1076 shrink = F_SHRINK
825 CODE: 1077 CODE:
826{ 1078{
827 UV *uv = SvJSON (self); 1079 UV *uv = SvJSON (self);
828 if (enable) 1080 if (enable)
829 *uv |= ix; 1081 *uv |= ix;
… …
833 RETVAL = newSVsv (self); 1085 RETVAL = newSVsv (self);
834} 1086}
835 OUTPUT: 1087 OUTPUT:
836 RETVAL 1088 RETVAL
837 1089
1090SV *max_depth (SV *self, UV max_depth = 0x80000000UL)
1091 CODE:
1092{
1093 UV *uv = SvJSON (self);
1094 UV log2 = 0;
1095
1096 if (max_depth > 0x80000000UL) max_depth = 0x80000000UL;
1097
1098 while ((1UL << log2) < max_depth)
1099 ++log2;
1100
1101 *uv = *uv & ~F_MAXDEPTH | (log2 << S_MAXDEPTH);
1102
1103 RETVAL = newSVsv (self);
1104}
1105 OUTPUT:
1106 RETVAL
1107
838void encode (SV *self, SV *scalar) 1108void encode (SV *self, SV *scalar)
839 PPCODE: 1109 PPCODE:
840 XPUSHs (encode_json (scalar, *SvJSON (self))); 1110 XPUSHs (encode_json (scalar, *SvJSON (self)));
841 1111
842void decode (SV *self, SV *jsonstr) 1112void decode (SV *self, SV *jsonstr)
843 PPCODE: 1113 PPCODE:
844 XPUSHs (decode_json (jsonstr, *SvJSON (self))); 1114 XPUSHs (decode_json (jsonstr, *SvJSON (self)));
845 1115
1116PROTOTYPES: ENABLE
1117
846void to_json (SV *scalar) 1118void to_json (SV *scalar)
1119 ALIAS:
1120 objToJson = 0
847 PPCODE: 1121 PPCODE:
848 XPUSHs (encode_json (scalar, F_UTF8)); 1122 XPUSHs (encode_json (scalar, F_DEFAULT | F_UTF8));
849 1123
850void from_json (SV *jsonstr) 1124void from_json (SV *jsonstr)
1125 ALIAS:
1126 jsonToObj = 0
851 PPCODE: 1127 PPCODE:
852 XPUSHs (decode_json (jsonstr, F_UTF8)); 1128 XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8));
853 1129

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