… | |
… | |
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" |
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8 | #include "stdio.h" |
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9 | |
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10 | #if defined(__BORLANDC__) || defined(_MSC_VER) |
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11 | # define snprintf _snprintf // C compilers have this in stdio.h |
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12 | #endif |
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13 | |
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14 | // some old perls do not have this, try to make it work, no |
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15 | // guarentees, though. if it breaks, you get to keep the pieces. |
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16 | #ifndef UTF8_MAXBYTES |
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17 | # define UTF8_MAXBYTES 13 |
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18 | #endif |
8 | |
19 | |
9 | #define F_ASCII 0x00000001UL |
20 | #define F_ASCII 0x00000001UL |
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21 | #define F_LATIN1 0x00000002UL |
10 | #define F_UTF8 0x00000002UL |
22 | #define F_UTF8 0x00000004UL |
11 | #define F_INDENT 0x00000004UL |
23 | #define F_INDENT 0x00000008UL |
12 | #define F_CANONICAL 0x00000008UL |
24 | #define F_CANONICAL 0x00000010UL |
13 | #define F_SPACE_BEFORE 0x00000010UL |
25 | #define F_SPACE_BEFORE 0x00000020UL |
14 | #define F_SPACE_AFTER 0x00000020UL |
26 | #define F_SPACE_AFTER 0x00000040UL |
15 | #define F_ALLOW_NONREF 0x00000080UL |
27 | #define F_ALLOW_NONREF 0x00000100UL |
16 | #define F_SHRINK 0x00000100UL |
28 | #define F_SHRINK 0x00000200UL |
17 | #define F_MAXDEPTH 0xf8000000UL |
29 | #define F_MAXDEPTH 0xf8000000UL |
18 | #define S_MAXDEPTH 27 |
30 | #define S_MAXDEPTH 27 |
19 | |
31 | |
20 | #define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH)) |
32 | #define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH)) |
21 | |
33 | |
… | |
… | |
26 | #define F_DEFAULT (9UL << S_MAXDEPTH) |
38 | #define F_DEFAULT (9UL << S_MAXDEPTH) |
27 | |
39 | |
28 | #define INIT_SIZE 32 // initial scalar size to be allocated |
40 | #define INIT_SIZE 32 // initial scalar size to be allocated |
29 | #define INDENT_STEP 3 // spaces per indentation level |
41 | #define INDENT_STEP 3 // spaces per indentation level |
30 | |
42 | |
31 | #define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character |
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32 | #define SHORT_STRING_LEN 512 // special-case strings of up to this size |
43 | #define SHORT_STRING_LEN 16384 // special-case strings of up to this size |
33 | |
44 | |
34 | #define SB do { |
45 | #define SB do { |
35 | #define SE } while (0) |
46 | #define SE } while (0) |
36 | |
47 | |
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48 | #if __GNUC__ >= 3 |
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49 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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50 | # define inline inline |
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51 | #else |
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52 | # define expect(expr,value) (expr) |
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53 | # define inline static |
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54 | #endif |
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55 | |
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56 | #define expect_false(expr) expect ((expr) != 0, 0) |
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57 | #define expect_true(expr) expect ((expr) != 0, 1) |
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58 | |
37 | static HV *json_stash; // JSON::XS:: |
59 | static HV *json_stash; // JSON::XS:: |
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60 | static SV *json_true, *json_false; |
38 | |
61 | |
39 | ///////////////////////////////////////////////////////////////////////////// |
62 | ///////////////////////////////////////////////////////////////////////////// |
40 | // utility functions |
63 | // utility functions |
41 | |
64 | |
42 | static UV * |
65 | static UV * |
… | |
… | |
65 | // decode an utf-8 character and return it, or (UV)-1 in |
88 | // decode an utf-8 character and return it, or (UV)-1 in |
66 | // case of an error. |
89 | // case of an error. |
67 | // we special-case "safe" characters from U+80 .. U+7FF, |
90 | // we special-case "safe" characters from U+80 .. U+7FF, |
68 | // but use the very good perl function to parse anything else. |
91 | // but use the very good perl function to parse anything else. |
69 | // note that we never call this function for a ascii codepoints |
92 | // note that we never call this function for a ascii codepoints |
70 | static UV |
93 | inline UV |
71 | decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen) |
94 | decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen) |
72 | { |
95 | { |
73 | if (s[0] > 0xdf || s[0] < 0xc2) |
96 | if (expect_false (s[0] > 0xdf || s[0] < 0xc2)) |
74 | return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY); |
97 | return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY); |
75 | else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf) |
98 | else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf) |
76 | { |
99 | { |
77 | *clen = 2; |
100 | *clen = 2; |
78 | return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); |
101 | return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); |
… | |
… | |
96 | U32 flags; // F_* |
119 | U32 flags; // F_* |
97 | U32 indent; // indentation level |
120 | U32 indent; // indentation level |
98 | U32 maxdepth; // max. indentation/recursion level |
121 | U32 maxdepth; // max. indentation/recursion level |
99 | } enc_t; |
122 | } enc_t; |
100 | |
123 | |
101 | static void |
124 | inline void |
102 | need (enc_t *enc, STRLEN len) |
125 | need (enc_t *enc, STRLEN len) |
103 | { |
126 | { |
104 | if (enc->cur + len >= enc->end) |
127 | if (expect_false (enc->cur + len >= enc->end)) |
105 | { |
128 | { |
106 | STRLEN cur = enc->cur - SvPVX (enc->sv); |
129 | STRLEN cur = enc->cur - SvPVX (enc->sv); |
107 | SvGROW (enc->sv, cur + len + 1); |
130 | SvGROW (enc->sv, cur + len + 1); |
108 | enc->cur = SvPVX (enc->sv) + cur; |
131 | enc->cur = SvPVX (enc->sv) + cur; |
109 | enc->end = SvPVX (enc->sv) + SvLEN (enc->sv); |
132 | enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
110 | } |
133 | } |
111 | } |
134 | } |
112 | |
135 | |
113 | static void |
136 | inline void |
114 | encode_ch (enc_t *enc, char ch) |
137 | encode_ch (enc_t *enc, char ch) |
115 | { |
138 | { |
116 | need (enc, 1); |
139 | need (enc, 1); |
117 | *enc->cur++ = ch; |
140 | *enc->cur++ = ch; |
118 | } |
141 | } |
… | |
… | |
126 | |
149 | |
127 | while (str < end) |
150 | while (str < end) |
128 | { |
151 | { |
129 | unsigned char ch = *(unsigned char *)str; |
152 | unsigned char ch = *(unsigned char *)str; |
130 | |
153 | |
131 | if (ch >= 0x20 && ch < 0x80) // most common case |
154 | if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case |
132 | { |
155 | { |
133 | if (ch == '"') // but with slow exceptions |
156 | if (expect_false (ch == '"')) // but with slow exceptions |
134 | { |
157 | { |
135 | need (enc, len += 1); |
158 | need (enc, len += 1); |
136 | *enc->cur++ = '\\'; |
159 | *enc->cur++ = '\\'; |
137 | *enc->cur++ = '"'; |
160 | *enc->cur++ = '"'; |
138 | } |
161 | } |
139 | else if (ch == '\\') |
162 | else if (expect_false (ch == '\\')) |
140 | { |
163 | { |
141 | need (enc, len += 1); |
164 | need (enc, len += 1); |
142 | *enc->cur++ = '\\'; |
165 | *enc->cur++ = '\\'; |
143 | *enc->cur++ = '\\'; |
166 | *enc->cur++ = '\\'; |
144 | } |
167 | } |
… | |
… | |
162 | STRLEN clen; |
185 | STRLEN clen; |
163 | UV uch; |
186 | UV uch; |
164 | |
187 | |
165 | if (is_utf8) |
188 | if (is_utf8) |
166 | { |
189 | { |
167 | //uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY); |
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168 | uch = decode_utf8 (str, end - str, &clen); |
190 | uch = decode_utf8 (str, end - str, &clen); |
169 | if (clen == (STRLEN)-1) |
191 | if (clen == (STRLEN)-1) |
170 | croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str); |
192 | croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str); |
171 | } |
193 | } |
172 | else |
194 | else |
… | |
… | |
176 | } |
198 | } |
177 | |
199 | |
178 | if (uch > 0x10FFFFUL) |
200 | if (uch > 0x10FFFFUL) |
179 | croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
201 | croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
180 | |
202 | |
181 | if (uch < 0x80 || enc->flags & F_ASCII) |
203 | if (uch < 0x80 || enc->flags & F_ASCII || (enc->flags & F_LATIN1 && uch > 0xFF)) |
182 | { |
204 | { |
183 | if (uch > 0xFFFFUL) |
205 | if (uch > 0xFFFFUL) |
184 | { |
206 | { |
185 | need (enc, len += 11); |
207 | need (enc, len += 11); |
186 | sprintf (enc->cur, "\\u%04x\\u%04x", |
208 | sprintf (enc->cur, "\\u%04x\\u%04x", |
… | |
… | |
200 | *enc->cur++ = hexdigit [(uch >> 0) & 15]; |
222 | *enc->cur++ = hexdigit [(uch >> 0) & 15]; |
201 | } |
223 | } |
202 | |
224 | |
203 | str += clen; |
225 | str += clen; |
204 | } |
226 | } |
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227 | else if (enc->flags & F_LATIN1) |
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228 | { |
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229 | *enc->cur++ = uch; |
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230 | str += clen; |
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231 | } |
205 | else if (is_utf8) |
232 | else if (is_utf8) |
206 | { |
233 | { |
207 | need (enc, len += clen); |
234 | need (enc, len += clen); |
208 | do |
235 | do |
209 | { |
236 | { |
… | |
… | |
211 | } |
238 | } |
212 | while (--clen); |
239 | while (--clen); |
213 | } |
240 | } |
214 | else |
241 | else |
215 | { |
242 | { |
216 | need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed |
243 | need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed |
217 | enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); |
244 | enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); |
218 | ++str; |
245 | ++str; |
219 | } |
246 | } |
220 | } |
247 | } |
221 | } |
248 | } |
… | |
… | |
223 | |
250 | |
224 | --len; |
251 | --len; |
225 | } |
252 | } |
226 | } |
253 | } |
227 | |
254 | |
228 | static void |
255 | inline void |
229 | encode_indent (enc_t *enc) |
256 | encode_indent (enc_t *enc) |
230 | { |
257 | { |
231 | if (enc->flags & F_INDENT) |
258 | if (enc->flags & F_INDENT) |
232 | { |
259 | { |
233 | int spaces = enc->indent * INDENT_STEP; |
260 | int spaces = enc->indent * INDENT_STEP; |
… | |
… | |
236 | memset (enc->cur, ' ', spaces); |
263 | memset (enc->cur, ' ', spaces); |
237 | enc->cur += spaces; |
264 | enc->cur += spaces; |
238 | } |
265 | } |
239 | } |
266 | } |
240 | |
267 | |
241 | static void |
268 | inline void |
242 | encode_space (enc_t *enc) |
269 | encode_space (enc_t *enc) |
243 | { |
270 | { |
244 | need (enc, 1); |
271 | need (enc, 1); |
245 | encode_ch (enc, ' '); |
272 | encode_ch (enc, ' '); |
246 | } |
273 | } |
247 | |
274 | |
248 | static void |
275 | inline void |
249 | encode_nl (enc_t *enc) |
276 | encode_nl (enc_t *enc) |
250 | { |
277 | { |
251 | if (enc->flags & F_INDENT) |
278 | if (enc->flags & F_INDENT) |
252 | { |
279 | { |
253 | need (enc, 1); |
280 | need (enc, 1); |
254 | encode_ch (enc, '\n'); |
281 | encode_ch (enc, '\n'); |
255 | } |
282 | } |
256 | } |
283 | } |
257 | |
284 | |
258 | static void |
285 | inline void |
259 | encode_comma (enc_t *enc) |
286 | encode_comma (enc_t *enc) |
260 | { |
287 | { |
261 | encode_ch (enc, ','); |
288 | encode_ch (enc, ','); |
262 | |
289 | |
263 | if (enc->flags & F_INDENT) |
290 | if (enc->flags & F_INDENT) |
… | |
… | |
362 | // actually, this is mostly due to the stupid so-called |
389 | // actually, this is mostly due to the stupid so-called |
363 | // security workaround added somewhere in 5.8.x. |
390 | // security workaround added somewhere in 5.8.x. |
364 | // that randomises hash orderings |
391 | // that randomises hash orderings |
365 | if (enc->flags & F_CANONICAL) |
392 | if (enc->flags & F_CANONICAL) |
366 | { |
393 | { |
367 | HE *he, *hes [count]; // if your compiler dies here, you need to enable C99 mode |
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368 | int fast = 1; |
394 | int fast = 1; |
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395 | HE *he; |
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396 | #if defined(__BORLANDC__) || defined(_MSC_VER) |
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397 | HE **hes = _alloca (count * sizeof (HE)); |
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398 | #else |
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399 | HE *hes [count]; // if your compiler dies here, you need to enable C99 mode |
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400 | #endif |
369 | |
401 | |
370 | i = 0; |
402 | i = 0; |
371 | while ((he = hv_iternext (hv))) |
403 | while ((he = hv_iternext (hv))) |
372 | { |
404 | { |
373 | hes [i++] = he; |
405 | hes [i++] = he; |
… | |
… | |
408 | |
440 | |
409 | encode_nl (enc); |
441 | encode_nl (enc); |
410 | } |
442 | } |
411 | else |
443 | else |
412 | { |
444 | { |
413 | SV *sv; |
|
|
414 | HE *he = hv_iternext (hv); |
445 | HE *he = hv_iternext (hv); |
415 | |
446 | |
416 | for (;;) |
447 | for (;;) |
417 | { |
448 | { |
418 | encode_indent (enc); |
449 | encode_indent (enc); |
… | |
… | |
433 | |
464 | |
434 | // encode objects, arrays and special \0=false and \1=true values. |
465 | // encode objects, arrays and special \0=false and \1=true values. |
435 | static void |
466 | static void |
436 | encode_rv (enc_t *enc, SV *sv) |
467 | encode_rv (enc_t *enc, SV *sv) |
437 | { |
468 | { |
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|
469 | svtype svt; |
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470 | |
438 | SvGETMAGIC (sv); |
471 | SvGETMAGIC (sv); |
439 | |
|
|
440 | svtype svt = SvTYPE (sv); |
472 | svt = SvTYPE (sv); |
441 | |
473 | |
442 | if (svt == SVt_PVHV) |
474 | if (svt == SVt_PVHV) |
443 | encode_hv (enc, (HV *)sv); |
475 | encode_hv (enc, (HV *)sv); |
444 | else if (svt == SVt_PVAV) |
476 | else if (svt == SVt_PVAV) |
445 | encode_av (enc, (AV *)sv); |
477 | encode_av (enc, (AV *)sv); |
… | |
… | |
471 | encode_str (enc, str, len, SvUTF8 (sv)); |
503 | encode_str (enc, str, len, SvUTF8 (sv)); |
472 | encode_ch (enc, '"'); |
504 | encode_ch (enc, '"'); |
473 | } |
505 | } |
474 | else if (SvNOKp (sv)) |
506 | else if (SvNOKp (sv)) |
475 | { |
507 | { |
|
|
508 | // trust that perl will do the right thing w.r.t. JSON syntax. |
476 | need (enc, NV_DIG + 32); |
509 | need (enc, NV_DIG + 32); |
477 | Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); |
510 | Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); |
478 | enc->cur += strlen (enc->cur); |
511 | enc->cur += strlen (enc->cur); |
479 | } |
512 | } |
480 | else if (SvIOKp (sv)) |
513 | else if (SvIOKp (sv)) |
481 | { |
514 | { |
482 | need (enc, 64); |
515 | // we assume we can always read an IV as a UV |
|
|
516 | if (SvUV (sv) & ~(UV)0x7fff) |
|
|
517 | { |
|
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518 | // large integer, use the (rather slow) snprintf way. |
|
|
519 | need (enc, sizeof (UV) * 3); |
483 | enc->cur += |
520 | enc->cur += |
484 | SvIsUV(sv) |
521 | SvIsUV(sv) |
485 | ? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv)) |
522 | ? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv)) |
486 | : snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv)); |
523 | : snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv)); |
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524 | } |
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525 | else |
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526 | { |
|
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527 | // optimise the "small number case" |
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528 | // code will likely be branchless and use only a single multiplication |
|
|
529 | I32 i = SvIV (sv); |
|
|
530 | U32 u; |
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531 | char digit, nz = 0; |
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532 | |
|
|
533 | need (enc, 6); |
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534 | |
|
|
535 | *enc->cur = '-'; enc->cur += i < 0 ? 1 : 0; |
|
|
536 | u = i < 0 ? -i : i; |
|
|
537 | |
|
|
538 | // convert to 4.28 fixed-point representation |
|
|
539 | u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits |
|
|
540 | |
|
|
541 | // now output digit by digit, each time masking out the integer part |
|
|
542 | // and multiplying by 5 while moving the decimal point one to the right, |
|
|
543 | // resulting in a net multiplication by 10. |
|
|
544 | // we always write the digit to memory but conditionally increment |
|
|
545 | // the pointer, to ease the usage of conditional move instructions. |
|
|
546 | digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5; |
|
|
547 | digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5; |
|
|
548 | digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5; |
|
|
549 | digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5; |
|
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550 | digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0' |
|
|
551 | } |
487 | } |
552 | } |
488 | else if (SvROK (sv)) |
553 | else if (SvROK (sv)) |
489 | encode_rv (enc, SvRV (sv)); |
554 | encode_rv (enc, SvRV (sv)); |
490 | else if (!SvOK (sv)) |
555 | else if (!SvOK (sv)) |
491 | encode_str (enc, "null", 4, 0); |
556 | encode_str (enc, "null", 4, 0); |
… | |
… | |
495 | } |
560 | } |
496 | |
561 | |
497 | static SV * |
562 | static SV * |
498 | encode_json (SV *scalar, U32 flags) |
563 | encode_json (SV *scalar, U32 flags) |
499 | { |
564 | { |
|
|
565 | enc_t enc; |
|
|
566 | |
500 | if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) |
567 | if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) |
501 | croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); |
568 | croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); |
502 | |
569 | |
503 | enc_t enc; |
|
|
504 | enc.flags = flags; |
570 | enc.flags = flags; |
505 | enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
571 | enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
506 | enc.cur = SvPVX (enc.sv); |
572 | enc.cur = SvPVX (enc.sv); |
507 | enc.end = SvEND (enc.sv); |
573 | enc.end = SvEND (enc.sv); |
508 | enc.indent = 0; |
574 | enc.indent = 0; |
509 | enc.maxdepth = DEC_DEPTH (flags); |
575 | enc.maxdepth = DEC_DEPTH (flags); |
510 | |
576 | |
511 | SvPOK_only (enc.sv); |
577 | SvPOK_only (enc.sv); |
512 | encode_sv (&enc, scalar); |
578 | encode_sv (&enc, scalar); |
513 | |
579 | |
|
|
580 | SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
|
|
581 | *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
|
|
582 | |
514 | if (!(flags & (F_ASCII | F_UTF8))) |
583 | if (!(flags & (F_ASCII | F_LATIN1 | F_UTF8))) |
515 | SvUTF8_on (enc.sv); |
584 | SvUTF8_on (enc.sv); |
516 | |
|
|
517 | SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
|
|
518 | |
585 | |
519 | if (enc.flags & F_SHRINK) |
586 | if (enc.flags & F_SHRINK) |
520 | shrink (enc.sv); |
587 | shrink (enc.sv); |
521 | |
588 | |
522 | return enc.sv; |
589 | return enc.sv; |
… | |
… | |
534 | U32 flags; // F_* |
601 | U32 flags; // F_* |
535 | U32 depth; // recursion depth |
602 | U32 depth; // recursion depth |
536 | U32 maxdepth; // recursion depth limit |
603 | U32 maxdepth; // recursion depth limit |
537 | } dec_t; |
604 | } dec_t; |
538 | |
605 | |
539 | static void |
606 | inline void |
540 | decode_ws (dec_t *dec) |
607 | decode_ws (dec_t *dec) |
541 | { |
608 | { |
542 | for (;;) |
609 | for (;;) |
543 | { |
610 | { |
544 | char ch = *dec->cur; |
611 | char ch = *dec->cur; |
… | |
… | |
570 | decode_4hex (dec_t *dec) |
637 | decode_4hex (dec_t *dec) |
571 | { |
638 | { |
572 | signed char d1, d2, d3, d4; |
639 | signed char d1, d2, d3, d4; |
573 | unsigned char *cur = (unsigned char *)dec->cur; |
640 | unsigned char *cur = (unsigned char *)dec->cur; |
574 | |
641 | |
575 | d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected"); |
642 | d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected"); |
576 | d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected"); |
643 | d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected"); |
577 | d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected"); |
644 | d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected"); |
578 | d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected"); |
645 | d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected"); |
579 | |
646 | |
580 | dec->cur += 4; |
647 | dec->cur += 4; |
581 | |
648 | |
582 | return ((UV)d1) << 12 |
649 | return ((UV)d1) << 12 |
583 | | ((UV)d2) << 8 |
650 | | ((UV)d2) << 8 |
… | |
… | |
591 | static SV * |
658 | static SV * |
592 | decode_str (dec_t *dec) |
659 | decode_str (dec_t *dec) |
593 | { |
660 | { |
594 | SV *sv = 0; |
661 | SV *sv = 0; |
595 | int utf8 = 0; |
662 | int utf8 = 0; |
|
|
663 | char *dec_cur = dec->cur; |
596 | |
664 | |
597 | do |
665 | do |
598 | { |
666 | { |
599 | char buf [SHORT_STRING_LEN + UTF8_MAX_LEN]; |
667 | char buf [SHORT_STRING_LEN + UTF8_MAXBYTES]; |
600 | char *cur = buf; |
668 | char *cur = buf; |
601 | |
669 | |
602 | do |
670 | do |
603 | { |
671 | { |
604 | unsigned char ch = *(unsigned char *)dec->cur++; |
672 | unsigned char ch = *(unsigned char *)dec_cur++; |
605 | |
673 | |
606 | if (ch == '"') |
674 | if (expect_false (ch == '"')) |
607 | { |
675 | { |
608 | --dec->cur; |
676 | --dec_cur; |
609 | break; |
677 | break; |
610 | } |
678 | } |
611 | else if (ch == '\\') |
679 | else if (expect_false (ch == '\\')) |
612 | { |
680 | { |
613 | switch (*dec->cur) |
681 | switch (*dec_cur) |
614 | { |
682 | { |
615 | case '\\': |
683 | case '\\': |
616 | case '/': |
684 | case '/': |
617 | case '"': *cur++ = *dec->cur++; break; |
685 | case '"': *cur++ = *dec_cur++; break; |
618 | |
686 | |
619 | case 'b': ++dec->cur; *cur++ = '\010'; break; |
687 | case 'b': ++dec_cur; *cur++ = '\010'; break; |
620 | case 't': ++dec->cur; *cur++ = '\011'; break; |
688 | case 't': ++dec_cur; *cur++ = '\011'; break; |
621 | case 'n': ++dec->cur; *cur++ = '\012'; break; |
689 | case 'n': ++dec_cur; *cur++ = '\012'; break; |
622 | case 'f': ++dec->cur; *cur++ = '\014'; break; |
690 | case 'f': ++dec_cur; *cur++ = '\014'; break; |
623 | case 'r': ++dec->cur; *cur++ = '\015'; break; |
691 | case 'r': ++dec_cur; *cur++ = '\015'; break; |
624 | |
692 | |
625 | case 'u': |
693 | case 'u': |
626 | { |
694 | { |
627 | UV lo, hi; |
695 | UV lo, hi; |
628 | ++dec->cur; |
696 | ++dec_cur; |
629 | |
697 | |
|
|
698 | dec->cur = dec_cur; |
630 | hi = decode_4hex (dec); |
699 | hi = decode_4hex (dec); |
|
|
700 | dec_cur = dec->cur; |
631 | if (hi == (UV)-1) |
701 | if (hi == (UV)-1) |
632 | goto fail; |
702 | goto fail; |
633 | |
703 | |
634 | // possibly a surrogate pair |
704 | // possibly a surrogate pair |
635 | if (hi >= 0xd800) |
705 | if (hi >= 0xd800) |
636 | if (hi < 0xdc00) |
706 | if (hi < 0xdc00) |
637 | { |
707 | { |
638 | if (dec->cur [0] != '\\' || dec->cur [1] != 'u') |
708 | if (dec_cur [0] != '\\' || dec_cur [1] != 'u') |
639 | ERR ("missing low surrogate character in surrogate pair"); |
709 | ERR ("missing low surrogate character in surrogate pair"); |
640 | |
710 | |
641 | dec->cur += 2; |
711 | dec_cur += 2; |
642 | |
712 | |
|
|
713 | dec->cur = dec_cur; |
643 | lo = decode_4hex (dec); |
714 | lo = decode_4hex (dec); |
|
|
715 | dec_cur = dec->cur; |
644 | if (lo == (UV)-1) |
716 | if (lo == (UV)-1) |
645 | goto fail; |
717 | goto fail; |
646 | |
718 | |
647 | if (lo < 0xdc00 || lo >= 0xe000) |
719 | if (lo < 0xdc00 || lo >= 0xe000) |
648 | ERR ("surrogate pair expected"); |
720 | ERR ("surrogate pair expected"); |
… | |
… | |
662 | *cur++ = hi; |
734 | *cur++ = hi; |
663 | } |
735 | } |
664 | break; |
736 | break; |
665 | |
737 | |
666 | default: |
738 | default: |
667 | --dec->cur; |
739 | --dec_cur; |
668 | ERR ("illegal backslash escape sequence in string"); |
740 | ERR ("illegal backslash escape sequence in string"); |
669 | } |
741 | } |
670 | } |
742 | } |
671 | else if (ch >= 0x20 && ch <= 0x7f) |
743 | else if (expect_true (ch >= 0x20 && ch <= 0x7f)) |
672 | *cur++ = ch; |
744 | *cur++ = ch; |
673 | else if (ch >= 0x80) |
745 | else if (ch >= 0x80) |
674 | { |
746 | { |
675 | --dec->cur; |
|
|
676 | |
|
|
677 | STRLEN clen; |
747 | STRLEN clen; |
|
|
748 | UV uch; |
|
|
749 | |
|
|
750 | --dec_cur; |
|
|
751 | |
678 | UV uch = decode_utf8 (dec->cur, dec->end - dec->cur, &clen); |
752 | uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen); |
679 | if (clen == (STRLEN)-1) |
753 | if (clen == (STRLEN)-1) |
680 | ERR ("malformed UTF-8 character in JSON string"); |
754 | ERR ("malformed UTF-8 character in JSON string"); |
681 | |
755 | |
682 | do |
756 | do |
683 | *cur++ = *dec->cur++; |
757 | *cur++ = *dec_cur++; |
684 | while (--clen); |
758 | while (--clen); |
685 | |
759 | |
686 | utf8 = 1; |
760 | utf8 = 1; |
687 | } |
761 | } |
688 | else |
762 | else |
689 | { |
763 | { |
690 | --dec->cur; |
764 | --dec_cur; |
691 | |
765 | |
692 | if (!ch) |
766 | if (!ch) |
693 | ERR ("unexpected end of string while parsing JSON string"); |
767 | ERR ("unexpected end of string while parsing JSON string"); |
694 | else |
768 | else |
695 | ERR ("invalid character encountered while parsing JSON string"); |
769 | ERR ("invalid character encountered while parsing JSON string"); |
696 | } |
770 | } |
697 | } |
771 | } |
698 | while (cur < buf + SHORT_STRING_LEN); |
772 | while (cur < buf + SHORT_STRING_LEN); |
699 | |
773 | |
|
|
774 | { |
700 | STRLEN len = cur - buf; |
775 | STRLEN len = cur - buf; |
701 | |
776 | |
702 | if (sv) |
777 | if (sv) |
703 | { |
778 | { |
704 | SvGROW (sv, SvCUR (sv) + len + 1); |
779 | SvGROW (sv, SvCUR (sv) + len + 1); |
705 | memcpy (SvPVX (sv) + SvCUR (sv), buf, len); |
780 | memcpy (SvPVX (sv) + SvCUR (sv), buf, len); |
706 | SvCUR_set (sv, SvCUR (sv) + len); |
781 | SvCUR_set (sv, SvCUR (sv) + len); |
707 | } |
782 | } |
708 | else |
783 | else |
709 | sv = newSVpvn (buf, len); |
784 | sv = newSVpvn (buf, len); |
710 | } |
785 | } |
|
|
786 | } |
711 | while (*dec->cur != '"'); |
787 | while (*dec_cur != '"'); |
712 | |
788 | |
713 | ++dec->cur; |
789 | ++dec_cur; |
714 | |
790 | |
715 | if (sv) |
791 | if (sv) |
716 | { |
792 | { |
717 | SvPOK_only (sv); |
793 | SvPOK_only (sv); |
718 | *SvEND (sv) = 0; |
794 | *SvEND (sv) = 0; |
… | |
… | |
721 | SvUTF8_on (sv); |
797 | SvUTF8_on (sv); |
722 | } |
798 | } |
723 | else |
799 | else |
724 | sv = newSVpvn ("", 0); |
800 | sv = newSVpvn ("", 0); |
725 | |
801 | |
|
|
802 | dec->cur = dec_cur; |
726 | return sv; |
803 | return sv; |
727 | |
804 | |
728 | fail: |
805 | fail: |
|
|
806 | dec->cur = dec_cur; |
729 | return 0; |
807 | return 0; |
730 | } |
808 | } |
731 | |
809 | |
732 | static SV * |
810 | static SV * |
733 | decode_num (dec_t *dec) |
811 | decode_num (dec_t *dec) |
… | |
… | |
791 | is_nv = 1; |
869 | is_nv = 1; |
792 | } |
870 | } |
793 | |
871 | |
794 | if (!is_nv) |
872 | if (!is_nv) |
795 | { |
873 | { |
796 | UV uv; |
874 | // special case the rather common 1..4-digit-int case, assumes 32 bit ints or so |
797 | int numtype = grok_number (start, dec->cur - start, &uv); |
875 | if (*start == '-') |
798 | if (numtype & IS_NUMBER_IN_UV) |
876 | switch (dec->cur - start) |
799 | if (numtype & IS_NUMBER_NEG) |
|
|
800 | { |
877 | { |
801 | if (uv < (UV)IV_MIN) |
878 | case 2: return newSViv (-( start [1] - '0' * 1)); |
802 | return newSViv (-(IV)uv); |
879 | case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11)); |
|
|
880 | case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111)); |
|
|
881 | case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111)); |
803 | } |
882 | } |
|
|
883 | else |
|
|
884 | switch (dec->cur - start) |
|
|
885 | { |
|
|
886 | case 1: return newSViv ( start [0] - '0' * 1); |
|
|
887 | case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11); |
|
|
888 | case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111); |
|
|
889 | case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111); |
|
|
890 | } |
|
|
891 | |
|
|
892 | { |
|
|
893 | UV uv; |
|
|
894 | int numtype = grok_number (start, dec->cur - start, &uv); |
|
|
895 | if (numtype & IS_NUMBER_IN_UV) |
|
|
896 | if (numtype & IS_NUMBER_NEG) |
|
|
897 | { |
|
|
898 | if (uv < (UV)IV_MIN) |
|
|
899 | return newSViv (-(IV)uv); |
|
|
900 | } |
804 | else |
901 | else |
805 | return newSVuv (uv); |
902 | return newSVuv (uv); |
|
|
903 | |
|
|
904 | // here would likely be the place for bigint support |
806 | } |
905 | } |
|
|
906 | } |
807 | |
907 | |
|
|
908 | // if we ever support bigint or bigfloat, this is the place for bigfloat |
808 | return newSVnv (Atof (start)); |
909 | return newSVnv (Atof (start)); |
809 | |
910 | |
810 | fail: |
911 | fail: |
811 | return 0; |
912 | return 0; |
812 | } |
913 | } |
… | |
… | |
913 | |
1014 | |
914 | static SV * |
1015 | static SV * |
915 | decode_sv (dec_t *dec) |
1016 | decode_sv (dec_t *dec) |
916 | { |
1017 | { |
917 | decode_ws (dec); |
1018 | decode_ws (dec); |
|
|
1019 | |
|
|
1020 | // the beauty of JSON: you need exactly one character lookahead |
|
|
1021 | // to parse anything. |
918 | switch (*dec->cur) |
1022 | switch (*dec->cur) |
919 | { |
1023 | { |
920 | case '"': ++dec->cur; return decode_str (dec); |
1024 | case '"': ++dec->cur; return decode_str (dec); |
921 | case '[': ++dec->cur; return decode_av (dec); |
1025 | case '[': ++dec->cur; return decode_av (dec); |
922 | case '{': ++dec->cur; return decode_hv (dec); |
1026 | case '{': ++dec->cur; return decode_hv (dec); |
… | |
… | |
928 | |
1032 | |
929 | case 't': |
1033 | case 't': |
930 | if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
1034 | if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
931 | { |
1035 | { |
932 | dec->cur += 4; |
1036 | dec->cur += 4; |
933 | return newSViv (1); |
1037 | return SvREFCNT_inc (json_true); |
934 | } |
1038 | } |
935 | else |
1039 | else |
936 | ERR ("'true' expected"); |
1040 | ERR ("'true' expected"); |
937 | |
1041 | |
938 | break; |
1042 | break; |
939 | |
1043 | |
940 | case 'f': |
1044 | case 'f': |
941 | if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
1045 | if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
942 | { |
1046 | { |
943 | dec->cur += 5; |
1047 | dec->cur += 5; |
944 | return newSViv (0); |
1048 | return SvREFCNT_inc (json_false); |
945 | } |
1049 | } |
946 | else |
1050 | else |
947 | ERR ("'false' expected"); |
1051 | ERR ("'false' expected"); |
948 | |
1052 | |
949 | break; |
1053 | break; |
… | |
… | |
967 | fail: |
1071 | fail: |
968 | return 0; |
1072 | return 0; |
969 | } |
1073 | } |
970 | |
1074 | |
971 | static SV * |
1075 | static SV * |
972 | decode_json (SV *string, U32 flags) |
1076 | decode_json (SV *string, U32 flags, UV *offset_return) |
973 | { |
1077 | { |
|
|
1078 | dec_t dec; |
|
|
1079 | UV offset; |
974 | SV *sv; |
1080 | SV *sv; |
975 | |
1081 | |
|
|
1082 | SvGETMAGIC (string); |
976 | SvUPGRADE (string, SVt_PV); |
1083 | SvUPGRADE (string, SVt_PV); |
977 | |
1084 | |
978 | if (flags & F_UTF8) |
1085 | if (flags & F_UTF8) |
979 | sv_utf8_downgrade (string, 0); |
1086 | sv_utf8_downgrade (string, 0); |
980 | else |
1087 | else |
981 | sv_utf8_upgrade (string); |
1088 | sv_utf8_upgrade (string); |
982 | |
1089 | |
983 | SvGROW (string, SvCUR (string) + 1); // should basically be a NOP |
1090 | SvGROW (string, SvCUR (string) + 1); // should basically be a NOP |
984 | |
1091 | |
985 | dec_t dec; |
|
|
986 | dec.flags = flags; |
1092 | dec.flags = flags; |
987 | dec.cur = SvPVX (string); |
1093 | dec.cur = SvPVX (string); |
988 | dec.end = SvEND (string); |
1094 | dec.end = SvEND (string); |
989 | dec.err = 0; |
1095 | dec.err = 0; |
990 | dec.depth = 0; |
1096 | dec.depth = 0; |
991 | dec.maxdepth = DEC_DEPTH (dec.flags); |
1097 | dec.maxdepth = DEC_DEPTH (dec.flags); |
992 | |
1098 | |
993 | *dec.end = 0; // this should basically be a nop, too, but make sure its there |
1099 | *dec.end = 0; // this should basically be a nop, too, but make sure it's there |
994 | sv = decode_sv (&dec); |
1100 | sv = decode_sv (&dec); |
995 | |
1101 | |
|
|
1102 | if (!(offset_return || !sv)) |
|
|
1103 | { |
|
|
1104 | // check for trailing garbage |
|
|
1105 | decode_ws (&dec); |
|
|
1106 | |
|
|
1107 | if (*dec.cur) |
|
|
1108 | { |
|
|
1109 | dec.err = "garbage after JSON object"; |
|
|
1110 | SvREFCNT_dec (sv); |
|
|
1111 | sv = 0; |
|
|
1112 | } |
|
|
1113 | } |
|
|
1114 | |
|
|
1115 | if (offset_return || !sv) |
|
|
1116 | { |
|
|
1117 | offset = dec.flags & F_UTF8 |
|
|
1118 | ? dec.cur - SvPVX (string) |
|
|
1119 | : utf8_distance (dec.cur, SvPVX (string)); |
|
|
1120 | |
|
|
1121 | if (offset_return) |
|
|
1122 | *offset_return = offset; |
|
|
1123 | } |
|
|
1124 | |
996 | if (!sv) |
1125 | if (!sv) |
997 | { |
1126 | { |
998 | IV offset = dec.flags & F_UTF8 |
|
|
999 | ? dec.cur - SvPVX (string) |
|
|
1000 | : utf8_distance (dec.cur, SvPVX (string)); |
|
|
1001 | SV *uni = sv_newmortal (); |
1127 | SV *uni = sv_newmortal (); |
1002 | |
1128 | |
1003 | // horrible hack to silence warning inside pv_uni_display |
1129 | // horrible hack to silence warning inside pv_uni_display |
1004 | COP cop = *PL_curcop; |
1130 | COP cop = *PL_curcop; |
1005 | cop.cop_warnings = pWARN_NONE; |
1131 | cop.cop_warnings = pWARN_NONE; |
… | |
… | |
1030 | |
1156 | |
1031 | BOOT: |
1157 | BOOT: |
1032 | { |
1158 | { |
1033 | int i; |
1159 | int i; |
1034 | |
1160 | |
1035 | memset (decode_hexdigit, 0xff, 256); |
|
|
1036 | |
|
|
1037 | for (i = 0; i < 256; ++i) |
1161 | for (i = 0; i < 256; ++i) |
1038 | decode_hexdigit [i] = |
1162 | decode_hexdigit [i] = |
1039 | i >= '0' && i <= '9' ? i - '0' |
1163 | i >= '0' && i <= '9' ? i - '0' |
1040 | : i >= 'a' && i <= 'f' ? i - 'a' + 10 |
1164 | : i >= 'a' && i <= 'f' ? i - 'a' + 10 |
1041 | : i >= 'A' && i <= 'F' ? i - 'A' + 10 |
1165 | : i >= 'A' && i <= 'F' ? i - 'A' + 10 |
1042 | : -1; |
1166 | : -1; |
1043 | |
1167 | |
1044 | json_stash = gv_stashpv ("JSON::XS", 1); |
1168 | json_stash = gv_stashpv ("JSON::XS", 1); |
|
|
1169 | |
|
|
1170 | json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true ); |
|
|
1171 | json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false); |
1045 | } |
1172 | } |
1046 | |
1173 | |
1047 | PROTOTYPES: DISABLE |
1174 | PROTOTYPES: DISABLE |
1048 | |
1175 | |
1049 | SV *new (char *dummy) |
1176 | SV *new (char *dummy) |
… | |
… | |
1053 | RETVAL |
1180 | RETVAL |
1054 | |
1181 | |
1055 | SV *ascii (SV *self, int enable = 1) |
1182 | SV *ascii (SV *self, int enable = 1) |
1056 | ALIAS: |
1183 | ALIAS: |
1057 | ascii = F_ASCII |
1184 | ascii = F_ASCII |
|
|
1185 | latin1 = F_LATIN1 |
1058 | utf8 = F_UTF8 |
1186 | utf8 = F_UTF8 |
1059 | indent = F_INDENT |
1187 | indent = F_INDENT |
1060 | canonical = F_CANONICAL |
1188 | canonical = F_CANONICAL |
1061 | space_before = F_SPACE_BEFORE |
1189 | space_before = F_SPACE_BEFORE |
1062 | space_after = F_SPACE_AFTER |
1190 | space_after = F_SPACE_AFTER |
… | |
… | |
1074 | RETVAL = newSVsv (self); |
1202 | RETVAL = newSVsv (self); |
1075 | } |
1203 | } |
1076 | OUTPUT: |
1204 | OUTPUT: |
1077 | RETVAL |
1205 | RETVAL |
1078 | |
1206 | |
1079 | SV *max_depth (SV *self, int max_depth = 0x80000000UL) |
1207 | SV *max_depth (SV *self, UV max_depth = 0x80000000UL) |
1080 | CODE: |
1208 | CODE: |
1081 | { |
1209 | { |
1082 | UV *uv = SvJSON (self); |
1210 | UV *uv = SvJSON (self); |
1083 | UV log2 = 0; |
1211 | UV log2 = 0; |
1084 | |
1212 | |
… | |
… | |
1098 | PPCODE: |
1226 | PPCODE: |
1099 | XPUSHs (encode_json (scalar, *SvJSON (self))); |
1227 | XPUSHs (encode_json (scalar, *SvJSON (self))); |
1100 | |
1228 | |
1101 | void decode (SV *self, SV *jsonstr) |
1229 | void decode (SV *self, SV *jsonstr) |
1102 | PPCODE: |
1230 | PPCODE: |
1103 | XPUSHs (decode_json (jsonstr, *SvJSON (self))); |
1231 | XPUSHs (decode_json (jsonstr, *SvJSON (self), 0)); |
|
|
1232 | |
|
|
1233 | void decode_prefix (SV *self, SV *jsonstr) |
|
|
1234 | PPCODE: |
|
|
1235 | { |
|
|
1236 | UV offset; |
|
|
1237 | EXTEND (SP, 2); |
|
|
1238 | PUSHs (decode_json (jsonstr, *SvJSON (self), &offset)); |
|
|
1239 | PUSHs (sv_2mortal (newSVuv (offset))); |
|
|
1240 | } |
1104 | |
1241 | |
1105 | PROTOTYPES: ENABLE |
1242 | PROTOTYPES: ENABLE |
1106 | |
1243 | |
1107 | void to_json (SV *scalar) |
1244 | void to_json (SV *scalar) |
1108 | ALIAS: |
1245 | ALIAS: |
… | |
… | |
1112 | |
1249 | |
1113 | void from_json (SV *jsonstr) |
1250 | void from_json (SV *jsonstr) |
1114 | ALIAS: |
1251 | ALIAS: |
1115 | jsonToObj = 0 |
1252 | jsonToObj = 0 |
1116 | PPCODE: |
1253 | PPCODE: |
1117 | XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8)); |
1254 | XPUSHs (decode_json (jsonstr, F_DEFAULT | F_UTF8, 0)); |
1118 | |
1255 | |