… | |
… | |
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" |
8 | |
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 |
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19 | |
9 | #define F_ASCII 0x00000001 |
20 | #define F_ASCII 0x00000001UL |
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21 | #define F_LATIN1 0x00000002UL |
10 | #define F_UTF8 0x00000002 |
22 | #define F_UTF8 0x00000004UL |
11 | #define F_INDENT 0x00000004 |
23 | #define F_INDENT 0x00000008UL |
12 | #define F_CANONICAL 0x00000008 |
24 | #define F_CANONICAL 0x00000010UL |
13 | #define F_SPACE_BEFORE 0x00000010 |
25 | #define F_SPACE_BEFORE 0x00000020UL |
14 | #define F_SPACE_AFTER 0x00000020 |
26 | #define F_SPACE_AFTER 0x00000040UL |
15 | #define F_ALLOW_NONREF 0x00000080 |
27 | #define F_ALLOW_NONREF 0x00000100UL |
16 | #define F_SHRINK 0x00000100 |
28 | #define F_SHRINK 0x00000200UL |
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29 | #define F_ALLOW_BLESSED 0x00000400UL |
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30 | #define F_CONV_BLESSED 0x00000800UL |
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31 | #define F_MAXDEPTH 0xf8000000UL |
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32 | #define S_MAXDEPTH 27 |
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33 | #define F_MAXSIZE 0x01f00000UL |
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34 | #define S_MAXSIZE 20 |
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35 | #define F_HOOK 0x00080000UL // some hooks exist, so slow-path processing |
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36 | |
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37 | #define DEC_DEPTH(flags) (1UL << ((flags & F_MAXDEPTH) >> S_MAXDEPTH)) |
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38 | #define DEC_SIZE(flags) (1UL << ((flags & F_MAXSIZE ) >> S_MAXSIZE )) |
17 | |
39 | |
18 | #define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER |
40 | #define F_PRETTY F_INDENT | F_SPACE_BEFORE | F_SPACE_AFTER |
19 | #define F_DEFAULT 0 |
41 | #define F_DEFAULT (9UL << S_MAXDEPTH) |
20 | |
42 | |
21 | #define INIT_SIZE 32 // initial scalar size to be allocated |
43 | #define INIT_SIZE 32 // initial scalar size to be allocated |
22 | #define INDENT_STEP 3 // spaces per indentation level |
44 | #define INDENT_STEP 3 // spaces per indentation level |
23 | |
45 | |
24 | #define UTF8_MAX_LEN 11 // for perls UTF-X: max. number of octets per character |
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25 | #define SHORT_STRING_LEN 256 // special-case strings of up to this size |
46 | #define SHORT_STRING_LEN 16384 // special-case strings of up to this size |
26 | |
47 | |
27 | #define SB do { |
48 | #define SB do { |
28 | #define SE } while (0) |
49 | #define SE } while (0) |
29 | |
50 | |
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51 | #if __GNUC__ >= 3 |
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52 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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53 | # define inline inline |
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54 | #else |
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55 | # define expect(expr,value) (expr) |
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56 | # define inline static |
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57 | #endif |
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58 | |
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59 | #define expect_false(expr) expect ((expr) != 0, 0) |
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60 | #define expect_true(expr) expect ((expr) != 0, 1) |
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61 | |
30 | static HV *json_stash; // JSON::XS:: |
62 | static HV *json_stash, *json_boolean_stash; // JSON::XS:: |
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63 | static SV *json_true, *json_false; |
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64 | |
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65 | typedef struct { |
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66 | U32 flags; |
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67 | SV *cb_object, *cb_sk_object; |
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68 | } JSON; |
31 | |
69 | |
32 | ///////////////////////////////////////////////////////////////////////////// |
70 | ///////////////////////////////////////////////////////////////////////////// |
33 | // utility functions |
71 | // utility functions |
34 | |
72 | |
35 | static UV * |
73 | inline void |
36 | SvJSON (SV *sv) |
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37 | { |
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38 | if (!(SvROK (sv) && SvOBJECT (SvRV (sv)) && SvSTASH (SvRV (sv)) == json_stash)) |
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39 | croak ("object is not of type JSON::XS"); |
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40 | |
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41 | return &SvUVX (SvRV (sv)); |
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42 | } |
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43 | |
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44 | static void |
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45 | shrink (SV *sv) |
74 | shrink (SV *sv) |
46 | { |
75 | { |
47 | sv_utf8_downgrade (sv, 1); |
76 | sv_utf8_downgrade (sv, 1); |
48 | if (SvLEN (sv) > SvCUR (sv) + 1) |
77 | if (SvLEN (sv) > SvCUR (sv) + 1) |
49 | { |
78 | { |
… | |
… | |
53 | SvPV_renew (sv, SvCUR (sv) + 1); |
82 | SvPV_renew (sv, SvCUR (sv) + 1); |
54 | #endif |
83 | #endif |
55 | } |
84 | } |
56 | } |
85 | } |
57 | |
86 | |
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87 | // decode an utf-8 character and return it, or (UV)-1 in |
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88 | // case of an error. |
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89 | // we special-case "safe" characters from U+80 .. U+7FF, |
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90 | // but use the very good perl function to parse anything else. |
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91 | // note that we never call this function for a ascii codepoints |
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92 | inline UV |
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93 | decode_utf8 (unsigned char *s, STRLEN len, STRLEN *clen) |
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94 | { |
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95 | if (expect_false (s[0] > 0xdf || s[0] < 0xc2)) |
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96 | return utf8n_to_uvuni (s, len, clen, UTF8_CHECK_ONLY); |
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97 | else if (len > 1 && s[1] >= 0x80 && s[1] <= 0xbf) |
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98 | { |
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99 | *clen = 2; |
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100 | return ((s[0] & 0x1f) << 6) | (s[1] & 0x3f); |
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101 | } |
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102 | else |
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103 | { |
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104 | *clen = (STRLEN)-1; |
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105 | return (UV)-1; |
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106 | } |
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107 | } |
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108 | |
58 | ///////////////////////////////////////////////////////////////////////////// |
109 | ///////////////////////////////////////////////////////////////////////////// |
59 | // encoder |
110 | // encoder |
60 | |
111 | |
61 | // structure used for encoding JSON |
112 | // structure used for encoding JSON |
62 | typedef struct |
113 | typedef struct |
63 | { |
114 | { |
64 | char *cur; // SvPVX (sv) + current output position |
115 | char *cur; // SvPVX (sv) + current output position |
65 | char *end; // SvEND (sv) |
116 | char *end; // SvEND (sv) |
66 | SV *sv; // result scalar |
117 | SV *sv; // result scalar |
67 | UV flags; // F_* |
118 | JSON json; |
68 | int indent; // indentation level |
119 | U32 indent; // indentation level |
69 | int max_depth; // max. recursion level |
120 | U32 maxdepth; // max. indentation/recursion level |
70 | } enc_t; |
121 | } enc_t; |
71 | |
122 | |
72 | static void |
123 | inline void |
73 | need (enc_t *enc, STRLEN len) |
124 | need (enc_t *enc, STRLEN len) |
74 | { |
125 | { |
75 | if (enc->cur + len >= enc->end) |
126 | if (expect_false (enc->cur + len >= enc->end)) |
76 | { |
127 | { |
77 | STRLEN cur = enc->cur - SvPVX (enc->sv); |
128 | STRLEN cur = enc->cur - SvPVX (enc->sv); |
78 | SvGROW (enc->sv, cur + len + 1); |
129 | SvGROW (enc->sv, cur + len + 1); |
79 | enc->cur = SvPVX (enc->sv) + cur; |
130 | enc->cur = SvPVX (enc->sv) + cur; |
80 | enc->end = SvPVX (enc->sv) + SvLEN (enc->sv); |
131 | enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
81 | } |
132 | } |
82 | } |
133 | } |
83 | |
134 | |
84 | static void |
135 | inline void |
85 | encode_ch (enc_t *enc, char ch) |
136 | encode_ch (enc_t *enc, char ch) |
86 | { |
137 | { |
87 | need (enc, 1); |
138 | need (enc, 1); |
88 | *enc->cur++ = ch; |
139 | *enc->cur++ = ch; |
89 | } |
140 | } |
… | |
… | |
97 | |
148 | |
98 | while (str < end) |
149 | while (str < end) |
99 | { |
150 | { |
100 | unsigned char ch = *(unsigned char *)str; |
151 | unsigned char ch = *(unsigned char *)str; |
101 | |
152 | |
102 | if (ch >= 0x20 && ch < 0x80) // most common case |
153 | if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case |
103 | { |
154 | { |
104 | if (ch == '"') // but with slow exceptions |
155 | if (expect_false (ch == '"')) // but with slow exceptions |
105 | { |
156 | { |
106 | need (enc, len += 1); |
157 | need (enc, len += 1); |
107 | *enc->cur++ = '\\'; |
158 | *enc->cur++ = '\\'; |
108 | *enc->cur++ = '"'; |
159 | *enc->cur++ = '"'; |
109 | } |
160 | } |
110 | else if (ch == '\\') |
161 | else if (expect_false (ch == '\\')) |
111 | { |
162 | { |
112 | need (enc, len += 1); |
163 | need (enc, len += 1); |
113 | *enc->cur++ = '\\'; |
164 | *enc->cur++ = '\\'; |
114 | *enc->cur++ = '\\'; |
165 | *enc->cur++ = '\\'; |
115 | } |
166 | } |
… | |
… | |
133 | STRLEN clen; |
184 | STRLEN clen; |
134 | UV uch; |
185 | UV uch; |
135 | |
186 | |
136 | if (is_utf8) |
187 | if (is_utf8) |
137 | { |
188 | { |
138 | uch = utf8n_to_uvuni (str, end - str, &clen, UTF8_CHECK_ONLY); |
189 | uch = decode_utf8 (str, end - str, &clen); |
139 | if (clen == (STRLEN)-1) |
190 | if (clen == (STRLEN)-1) |
140 | croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str); |
191 | croak ("malformed or illegal unicode character in string [%.11s], cannot convert to JSON", str); |
141 | } |
192 | } |
142 | else |
193 | else |
143 | { |
194 | { |
… | |
… | |
146 | } |
197 | } |
147 | |
198 | |
148 | if (uch > 0x10FFFFUL) |
199 | if (uch > 0x10FFFFUL) |
149 | croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
200 | croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
150 | |
201 | |
151 | if (uch < 0x80 || enc->flags & F_ASCII) |
202 | if (uch < 0x80 || enc->json.flags & F_ASCII || (enc->json.flags & F_LATIN1 && uch > 0xFF)) |
152 | { |
203 | { |
153 | if (uch > 0xFFFFUL) |
204 | if (uch > 0xFFFFUL) |
154 | { |
205 | { |
155 | need (enc, len += 11); |
206 | need (enc, len += 11); |
156 | sprintf (enc->cur, "\\u%04x\\u%04x", |
207 | sprintf (enc->cur, "\\u%04x\\u%04x", |
… | |
… | |
170 | *enc->cur++ = hexdigit [(uch >> 0) & 15]; |
221 | *enc->cur++ = hexdigit [(uch >> 0) & 15]; |
171 | } |
222 | } |
172 | |
223 | |
173 | str += clen; |
224 | str += clen; |
174 | } |
225 | } |
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226 | else if (enc->json.flags & F_LATIN1) |
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227 | { |
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228 | *enc->cur++ = uch; |
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229 | str += clen; |
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230 | } |
175 | else if (is_utf8) |
231 | else if (is_utf8) |
176 | { |
232 | { |
177 | need (enc, len += clen); |
233 | need (enc, len += clen); |
178 | do |
234 | do |
179 | { |
235 | { |
… | |
… | |
181 | } |
237 | } |
182 | while (--clen); |
238 | while (--clen); |
183 | } |
239 | } |
184 | else |
240 | else |
185 | { |
241 | { |
186 | need (enc, len += UTF8_MAX_LEN - 1); // never more than 11 bytes needed |
242 | need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed |
187 | enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); |
243 | enc->cur = uvuni_to_utf8_flags (enc->cur, uch, 0); |
188 | ++str; |
244 | ++str; |
189 | } |
245 | } |
190 | } |
246 | } |
191 | } |
247 | } |
… | |
… | |
193 | |
249 | |
194 | --len; |
250 | --len; |
195 | } |
251 | } |
196 | } |
252 | } |
197 | |
253 | |
198 | static void |
254 | inline void |
199 | encode_indent (enc_t *enc) |
255 | encode_indent (enc_t *enc) |
200 | { |
256 | { |
201 | if (enc->flags & F_INDENT) |
257 | if (enc->json.flags & F_INDENT) |
202 | { |
258 | { |
203 | int spaces = enc->indent * INDENT_STEP; |
259 | int spaces = enc->indent * INDENT_STEP; |
204 | |
260 | |
205 | need (enc, spaces); |
261 | need (enc, spaces); |
206 | memset (enc->cur, ' ', spaces); |
262 | memset (enc->cur, ' ', spaces); |
207 | enc->cur += spaces; |
263 | enc->cur += spaces; |
208 | } |
264 | } |
209 | } |
265 | } |
210 | |
266 | |
211 | static void |
267 | inline void |
212 | encode_space (enc_t *enc) |
268 | encode_space (enc_t *enc) |
213 | { |
269 | { |
214 | need (enc, 1); |
270 | need (enc, 1); |
215 | encode_ch (enc, ' '); |
271 | encode_ch (enc, ' '); |
216 | } |
272 | } |
217 | |
273 | |
218 | static void |
274 | inline void |
219 | encode_nl (enc_t *enc) |
275 | encode_nl (enc_t *enc) |
220 | { |
276 | { |
221 | if (enc->flags & F_INDENT) |
277 | if (enc->json.flags & F_INDENT) |
222 | { |
278 | { |
223 | need (enc, 1); |
279 | need (enc, 1); |
224 | encode_ch (enc, '\n'); |
280 | encode_ch (enc, '\n'); |
225 | } |
281 | } |
226 | } |
282 | } |
227 | |
283 | |
228 | static void |
284 | inline void |
229 | encode_comma (enc_t *enc) |
285 | encode_comma (enc_t *enc) |
230 | { |
286 | { |
231 | encode_ch (enc, ','); |
287 | encode_ch (enc, ','); |
232 | |
288 | |
233 | if (enc->flags & F_INDENT) |
289 | if (enc->json.flags & F_INDENT) |
234 | encode_nl (enc); |
290 | encode_nl (enc); |
235 | else if (enc->flags & F_SPACE_AFTER) |
291 | else if (enc->json.flags & F_SPACE_AFTER) |
236 | encode_space (enc); |
292 | encode_space (enc); |
237 | } |
293 | } |
238 | |
294 | |
239 | static void encode_sv (enc_t *enc, SV *sv); |
295 | static void encode_sv (enc_t *enc, SV *sv); |
240 | |
296 | |
241 | static void |
297 | static void |
242 | encode_av (enc_t *enc, AV *av) |
298 | encode_av (enc_t *enc, AV *av) |
243 | { |
299 | { |
244 | int i, len = av_len (av); |
300 | int i, len = av_len (av); |
|
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301 | |
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302 | if (enc->indent >= enc->maxdepth) |
|
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303 | croak ("data structure too deep (hit recursion limit)"); |
245 | |
304 | |
246 | encode_ch (enc, '['); encode_nl (enc); |
305 | encode_ch (enc, '['); encode_nl (enc); |
247 | ++enc->indent; |
306 | ++enc->indent; |
248 | |
307 | |
249 | for (i = 0; i <= len; ++i) |
308 | for (i = 0; i <= len; ++i) |
… | |
… | |
280 | else |
339 | else |
281 | encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); |
340 | encode_str (enc, HeKEY (he), HeKLEN (he), HeKUTF8 (he)); |
282 | |
341 | |
283 | encode_ch (enc, '"'); |
342 | encode_ch (enc, '"'); |
284 | |
343 | |
285 | if (enc->flags & F_SPACE_BEFORE) encode_space (enc); |
344 | if (enc->json.flags & F_SPACE_BEFORE) encode_space (enc); |
286 | encode_ch (enc, ':'); |
345 | encode_ch (enc, ':'); |
287 | if (enc->flags & F_SPACE_AFTER ) encode_space (enc); |
346 | if (enc->json.flags & F_SPACE_AFTER ) encode_space (enc); |
288 | encode_sv (enc, HeVAL (he)); |
347 | encode_sv (enc, HeVAL (he)); |
289 | } |
348 | } |
290 | |
349 | |
291 | // compare hash entries, used when all keys are bytestrings |
350 | // compare hash entries, used when all keys are bytestrings |
292 | static int |
351 | static int |
… | |
… | |
315 | |
374 | |
316 | static void |
375 | static void |
317 | encode_hv (enc_t *enc, HV *hv) |
376 | encode_hv (enc_t *enc, HV *hv) |
318 | { |
377 | { |
319 | int count, i; |
378 | int count, i; |
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379 | |
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380 | if (enc->indent >= enc->maxdepth) |
|
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381 | croak ("data structure too deep (hit recursion limit)"); |
320 | |
382 | |
321 | encode_ch (enc, '{'); encode_nl (enc); ++enc->indent; |
383 | encode_ch (enc, '{'); encode_nl (enc); ++enc->indent; |
322 | |
384 | |
323 | if ((count = hv_iterinit (hv))) |
385 | if ((count = hv_iterinit (hv))) |
324 | { |
386 | { |
325 | // for canonical output we have to sort by keys first |
387 | // for canonical output we have to sort by keys first |
326 | // actually, this is mostly due to the stupid so-called |
388 | // actually, this is mostly due to the stupid so-called |
327 | // security workaround added somewhere in 5.8.x. |
389 | // security workaround added somewhere in 5.8.x. |
328 | // that randomises hash orderings |
390 | // that randomises hash orderings |
329 | if (enc->flags & F_CANONICAL) |
391 | if (enc->json.flags & F_CANONICAL) |
330 | { |
392 | { |
331 | HE *he, *hes [count]; // if your compiler dies here, you need to enable C99 mode |
|
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332 | int fast = 1; |
393 | int fast = 1; |
|
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394 | HE *he; |
|
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395 | #if defined(__BORLANDC__) || defined(_MSC_VER) |
|
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396 | HE **hes = _alloca (count * sizeof (HE)); |
|
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397 | #else |
|
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398 | HE *hes [count]; // if your compiler dies here, you need to enable C99 mode |
|
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399 | #endif |
333 | |
400 | |
334 | i = 0; |
401 | i = 0; |
335 | while ((he = hv_iternext (hv))) |
402 | while ((he = hv_iternext (hv))) |
336 | { |
403 | { |
337 | hes [i++] = he; |
404 | hes [i++] = he; |
… | |
… | |
372 | |
439 | |
373 | encode_nl (enc); |
440 | encode_nl (enc); |
374 | } |
441 | } |
375 | else |
442 | else |
376 | { |
443 | { |
377 | SV *sv; |
|
|
378 | HE *he = hv_iternext (hv); |
444 | HE *he = hv_iternext (hv); |
379 | |
445 | |
380 | for (;;) |
446 | for (;;) |
381 | { |
447 | { |
382 | encode_indent (enc); |
448 | encode_indent (enc); |
… | |
… | |
391 | encode_nl (enc); |
457 | encode_nl (enc); |
392 | } |
458 | } |
393 | } |
459 | } |
394 | |
460 | |
395 | --enc->indent; encode_indent (enc); encode_ch (enc, '}'); |
461 | --enc->indent; encode_indent (enc); encode_ch (enc, '}'); |
|
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462 | } |
|
|
463 | |
|
|
464 | // encode objects, arrays and special \0=false and \1=true values. |
|
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465 | static void |
|
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466 | encode_rv (enc_t *enc, SV *sv) |
|
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467 | { |
|
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468 | svtype svt; |
|
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469 | |
|
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470 | SvGETMAGIC (sv); |
|
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471 | svt = SvTYPE (sv); |
|
|
472 | |
|
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473 | if (expect_false (SvOBJECT (sv))) |
|
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474 | { |
|
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475 | if (SvSTASH (sv) == json_boolean_stash) |
|
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476 | { |
|
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477 | if (SvIV (sv) == 0) |
|
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478 | encode_str (enc, "false", 5, 0); |
|
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479 | else |
|
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480 | encode_str (enc, "true", 4, 0); |
|
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481 | } |
|
|
482 | else |
|
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483 | { |
|
|
484 | #if 0 |
|
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485 | if (0 && sv_derived_from (rv, "JSON::Literal")) |
|
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486 | { |
|
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487 | // not yet |
|
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488 | } |
|
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489 | #endif |
|
|
490 | if (enc->json.flags & F_CONV_BLESSED) |
|
|
491 | { |
|
|
492 | // we re-bless the reference to get overload and other niceties right |
|
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493 | GV *to_json = gv_fetchmethod_autoload (SvSTASH (sv), "TO_JSON", 1); |
|
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494 | |
|
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495 | if (to_json) |
|
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496 | { |
|
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497 | dSP; ENTER; SAVETMPS; PUSHMARK (SP); |
|
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498 | XPUSHs (sv_bless (sv_2mortal (newRV_inc (sv)), SvSTASH (sv))); |
|
|
499 | |
|
|
500 | // calling with G_SCALAR ensures that we always get a 1 reutrn value |
|
|
501 | // check anyways. |
|
|
502 | PUTBACK; |
|
|
503 | assert (1 == call_sv ((SV *)GvCV (to_json), G_SCALAR)); |
|
|
504 | SPAGAIN; |
|
|
505 | |
|
|
506 | encode_sv (enc, POPs); |
|
|
507 | |
|
|
508 | FREETMPS; LEAVE; |
|
|
509 | } |
|
|
510 | else if (enc->json.flags & F_ALLOW_BLESSED) |
|
|
511 | encode_str (enc, "null", 4, 0); |
|
|
512 | else |
|
|
513 | croak ("encountered object '%s', but neither allow_blessed enabled nor TO_JSON method available on it", |
|
|
514 | SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
|
|
515 | } |
|
|
516 | else if (enc->json.flags & F_ALLOW_BLESSED) |
|
|
517 | encode_str (enc, "null", 4, 0); |
|
|
518 | else |
|
|
519 | croak ("encountered object '%s', but neither allow_blessed nor convert_blessed settings are enabled", |
|
|
520 | SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
|
|
521 | } |
|
|
522 | } |
|
|
523 | else if (svt == SVt_PVHV) |
|
|
524 | encode_hv (enc, (HV *)sv); |
|
|
525 | else if (svt == SVt_PVAV) |
|
|
526 | encode_av (enc, (AV *)sv); |
|
|
527 | else if (svt < SVt_PVAV) |
|
|
528 | { |
|
|
529 | STRLEN len = 0; |
|
|
530 | char *pv = svt ? SvPV (sv, len) : 0; |
|
|
531 | |
|
|
532 | if (len == 1 && *pv == '0') |
|
|
533 | encode_str (enc, "false", 5, 0); |
|
|
534 | else if (len == 1 && *pv == '1') |
|
|
535 | encode_str (enc, "true", 4, 0); |
|
|
536 | else |
|
|
537 | croak ("cannot encode reference to scalar '%s' unless the scalar is 0 or 1", |
|
|
538 | SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
|
|
539 | } |
|
|
540 | else |
|
|
541 | croak ("encountered %s, but JSON can only represent references to arrays or hashes", |
|
|
542 | SvPV_nolen (sv_2mortal (newRV_inc (sv)))); |
396 | } |
543 | } |
397 | |
544 | |
398 | static void |
545 | static void |
399 | encode_sv (enc_t *enc, SV *sv) |
546 | encode_sv (enc_t *enc, SV *sv) |
400 | { |
547 | { |
… | |
… | |
408 | encode_str (enc, str, len, SvUTF8 (sv)); |
555 | encode_str (enc, str, len, SvUTF8 (sv)); |
409 | encode_ch (enc, '"'); |
556 | encode_ch (enc, '"'); |
410 | } |
557 | } |
411 | else if (SvNOKp (sv)) |
558 | else if (SvNOKp (sv)) |
412 | { |
559 | { |
|
|
560 | // trust that perl will do the right thing w.r.t. JSON syntax. |
413 | need (enc, NV_DIG + 32); |
561 | need (enc, NV_DIG + 32); |
414 | Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); |
562 | Gconvert (SvNVX (sv), NV_DIG, 0, enc->cur); |
415 | enc->cur += strlen (enc->cur); |
563 | enc->cur += strlen (enc->cur); |
416 | } |
564 | } |
417 | else if (SvIOKp (sv)) |
565 | else if (SvIOKp (sv)) |
418 | { |
566 | { |
419 | need (enc, 64); |
567 | // we assume we can always read an IV as a UV |
|
|
568 | if (SvUV (sv) & ~(UV)0x7fff) |
|
|
569 | { |
|
|
570 | // large integer, use the (rather slow) snprintf way. |
|
|
571 | need (enc, sizeof (UV) * 3); |
420 | enc->cur += |
572 | enc->cur += |
421 | SvIsUV(sv) |
573 | SvIsUV(sv) |
422 | ? snprintf (enc->cur, 64, "%"UVuf, (UV)SvUVX (sv)) |
574 | ? snprintf (enc->cur, sizeof (UV) * 3, "%"UVuf, (UV)SvUVX (sv)) |
423 | : snprintf (enc->cur, 64, "%"IVdf, (IV)SvIVX (sv)); |
575 | : snprintf (enc->cur, sizeof (UV) * 3, "%"IVdf, (IV)SvIVX (sv)); |
|
|
576 | } |
|
|
577 | else |
|
|
578 | { |
|
|
579 | // optimise the "small number case" |
|
|
580 | // code will likely be branchless and use only a single multiplication |
|
|
581 | I32 i = SvIV (sv); |
|
|
582 | U32 u; |
|
|
583 | char digit, nz = 0; |
|
|
584 | |
|
|
585 | need (enc, 6); |
|
|
586 | |
|
|
587 | *enc->cur = '-'; enc->cur += i < 0 ? 1 : 0; |
|
|
588 | u = i < 0 ? -i : i; |
|
|
589 | |
|
|
590 | // convert to 4.28 fixed-point representation |
|
|
591 | u = u * ((0xfffffff + 10000) / 10000); // 10**5, 5 fractional digits |
|
|
592 | |
|
|
593 | // now output digit by digit, each time masking out the integer part |
|
|
594 | // and multiplying by 5 while moving the decimal point one to the right, |
|
|
595 | // resulting in a net multiplication by 10. |
|
|
596 | // we always write the digit to memory but conditionally increment |
|
|
597 | // the pointer, to ease the usage of conditional move instructions. |
|
|
598 | digit = u >> 28; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0xfffffff) * 5; |
|
|
599 | digit = u >> 27; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x7ffffff) * 5; |
|
|
600 | digit = u >> 26; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x3ffffff) * 5; |
|
|
601 | digit = u >> 25; *enc->cur = digit + '0'; enc->cur += (nz = nz || digit); u = (u & 0x1ffffff) * 5; |
|
|
602 | digit = u >> 24; *enc->cur = digit + '0'; enc->cur += 1; // correctly generate '0' |
|
|
603 | } |
424 | } |
604 | } |
425 | else if (SvROK (sv)) |
605 | else if (SvROK (sv)) |
426 | { |
606 | encode_rv (enc, SvRV (sv)); |
427 | SV *rv = SvRV (sv); |
|
|
428 | |
|
|
429 | if (enc->indent >= enc->max_depth) |
|
|
430 | croak ("data structure too deep (hit recursion limit)"); |
|
|
431 | |
|
|
432 | switch (SvTYPE (rv)) |
|
|
433 | { |
|
|
434 | case SVt_PVAV: encode_av (enc, (AV *)rv); break; |
|
|
435 | case SVt_PVHV: encode_hv (enc, (HV *)rv); break; |
|
|
436 | |
|
|
437 | default: |
|
|
438 | croak ("encountered %s, but JSON can only represent references to arrays or hashes", |
|
|
439 | SvPV_nolen (sv)); |
|
|
440 | } |
|
|
441 | } |
|
|
442 | else if (!SvOK (sv)) |
607 | else if (!SvOK (sv)) |
443 | encode_str (enc, "null", 4, 0); |
608 | encode_str (enc, "null", 4, 0); |
444 | else |
609 | else |
445 | croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this", |
610 | croak ("encountered perl type (%s,0x%x) that JSON cannot handle, you might want to report this", |
446 | SvPV_nolen (sv), SvFLAGS (sv)); |
611 | SvPV_nolen (sv), SvFLAGS (sv)); |
447 | } |
612 | } |
448 | |
613 | |
449 | static SV * |
614 | static SV * |
450 | encode_json (SV *scalar, UV flags) |
615 | encode_json (SV *scalar, JSON *json) |
451 | { |
616 | { |
|
|
617 | enc_t enc; |
|
|
618 | |
452 | if (!(flags & F_ALLOW_NONREF) && !SvROK (scalar)) |
619 | if (!(json->flags & F_ALLOW_NONREF) && !SvROK (scalar)) |
453 | croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); |
620 | croak ("hash- or arrayref expected (not a simple scalar, use allow_nonref to allow this)"); |
454 | |
621 | |
455 | enc_t enc; |
622 | enc.json = *json; |
456 | enc.flags = flags; |
|
|
457 | enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
623 | enc.sv = sv_2mortal (NEWSV (0, INIT_SIZE)); |
458 | enc.cur = SvPVX (enc.sv); |
624 | enc.cur = SvPVX (enc.sv); |
459 | enc.end = SvEND (enc.sv); |
625 | enc.end = SvEND (enc.sv); |
460 | enc.indent = 0; |
626 | enc.indent = 0; |
461 | enc.max_depth = 0x7fffffffUL; |
627 | enc.maxdepth = DEC_DEPTH (enc.json.flags); |
462 | |
628 | |
463 | SvPOK_only (enc.sv); |
629 | SvPOK_only (enc.sv); |
464 | encode_sv (&enc, scalar); |
630 | encode_sv (&enc, scalar); |
465 | |
631 | |
|
|
632 | SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
|
|
633 | *SvEND (enc.sv) = 0; // many xs functions expect a trailing 0 for text strings |
|
|
634 | |
466 | if (!(flags & (F_ASCII | F_UTF8))) |
635 | if (!(enc.json.flags & (F_ASCII | F_LATIN1 | F_UTF8))) |
467 | SvUTF8_on (enc.sv); |
636 | SvUTF8_on (enc.sv); |
468 | |
637 | |
469 | SvCUR_set (enc.sv, enc.cur - SvPVX (enc.sv)); |
|
|
470 | |
|
|
471 | if (enc.flags & F_SHRINK) |
638 | if (enc.json.flags & F_SHRINK) |
472 | shrink (enc.sv); |
639 | shrink (enc.sv); |
473 | |
640 | |
474 | return enc.sv; |
641 | return enc.sv; |
475 | } |
642 | } |
476 | |
643 | |
… | |
… | |
481 | typedef struct |
648 | typedef struct |
482 | { |
649 | { |
483 | char *cur; // current parser pointer |
650 | char *cur; // current parser pointer |
484 | char *end; // end of input string |
651 | char *end; // end of input string |
485 | const char *err; // parse error, if != 0 |
652 | const char *err; // parse error, if != 0 |
486 | UV flags; // F_* |
653 | JSON json; |
|
|
654 | U32 depth; // recursion depth |
|
|
655 | U32 maxdepth; // recursion depth limit |
487 | } dec_t; |
656 | } dec_t; |
488 | |
657 | |
489 | static void |
658 | inline void |
490 | decode_ws (dec_t *dec) |
659 | decode_ws (dec_t *dec) |
491 | { |
660 | { |
492 | for (;;) |
661 | for (;;) |
493 | { |
662 | { |
494 | char ch = *dec->cur; |
663 | char ch = *dec->cur; |
… | |
… | |
500 | ++dec->cur; |
669 | ++dec->cur; |
501 | } |
670 | } |
502 | } |
671 | } |
503 | |
672 | |
504 | #define ERR(reason) SB dec->err = reason; goto fail; SE |
673 | #define ERR(reason) SB dec->err = reason; goto fail; SE |
|
|
674 | |
505 | #define EXPECT_CH(ch) SB \ |
675 | #define EXPECT_CH(ch) SB \ |
506 | if (*dec->cur != ch) \ |
676 | if (*dec->cur != ch) \ |
507 | ERR (# ch " expected"); \ |
677 | ERR (# ch " expected"); \ |
508 | ++dec->cur; \ |
678 | ++dec->cur; \ |
509 | SE |
679 | SE |
510 | |
680 | |
|
|
681 | #define DEC_INC_DEPTH if (++dec->depth > dec->maxdepth) ERR ("json datastructure exceeds maximum nesting level (set a higher max_depth)") |
|
|
682 | #define DEC_DEC_DEPTH --dec->depth |
|
|
683 | |
511 | static SV *decode_sv (dec_t *dec); |
684 | static SV *decode_sv (dec_t *dec); |
512 | |
685 | |
513 | static signed char decode_hexdigit[256]; |
686 | static signed char decode_hexdigit[256]; |
514 | |
687 | |
515 | static UV |
688 | static UV |
516 | decode_4hex (dec_t *dec) |
689 | decode_4hex (dec_t *dec) |
517 | { |
690 | { |
518 | signed char d1, d2, d3, d4; |
691 | signed char d1, d2, d3, d4; |
519 | unsigned char *cur = (unsigned char *)dec->cur; |
692 | unsigned char *cur = (unsigned char *)dec->cur; |
520 | |
693 | |
521 | d1 = decode_hexdigit [cur [0]]; if (d1 < 0) ERR ("four hexadecimal digits expected"); |
694 | d1 = decode_hexdigit [cur [0]]; if (expect_false (d1 < 0)) ERR ("exactly four hexadecimal digits expected"); |
522 | d2 = decode_hexdigit [cur [1]]; if (d2 < 0) ERR ("four hexadecimal digits expected"); |
695 | d2 = decode_hexdigit [cur [1]]; if (expect_false (d2 < 0)) ERR ("exactly four hexadecimal digits expected"); |
523 | d3 = decode_hexdigit [cur [2]]; if (d3 < 0) ERR ("four hexadecimal digits expected"); |
696 | d3 = decode_hexdigit [cur [2]]; if (expect_false (d3 < 0)) ERR ("exactly four hexadecimal digits expected"); |
524 | d4 = decode_hexdigit [cur [3]]; if (d4 < 0) ERR ("four hexadecimal digits expected"); |
697 | d4 = decode_hexdigit [cur [3]]; if (expect_false (d4 < 0)) ERR ("exactly four hexadecimal digits expected"); |
525 | |
698 | |
526 | dec->cur += 4; |
699 | dec->cur += 4; |
527 | |
700 | |
528 | return ((UV)d1) << 12 |
701 | return ((UV)d1) << 12 |
529 | | ((UV)d2) << 8 |
702 | | ((UV)d2) << 8 |
… | |
… | |
537 | static SV * |
710 | static SV * |
538 | decode_str (dec_t *dec) |
711 | decode_str (dec_t *dec) |
539 | { |
712 | { |
540 | SV *sv = 0; |
713 | SV *sv = 0; |
541 | int utf8 = 0; |
714 | int utf8 = 0; |
|
|
715 | char *dec_cur = dec->cur; |
542 | |
716 | |
543 | do |
717 | do |
544 | { |
718 | { |
545 | char buf [SHORT_STRING_LEN + UTF8_MAX_LEN]; |
719 | char buf [SHORT_STRING_LEN + UTF8_MAXBYTES]; |
546 | char *cur = buf; |
720 | char *cur = buf; |
547 | |
721 | |
548 | do |
722 | do |
549 | { |
723 | { |
550 | unsigned char ch = *(unsigned char *)dec->cur++; |
724 | unsigned char ch = *(unsigned char *)dec_cur++; |
551 | |
725 | |
552 | if (ch == '"') |
726 | if (expect_false (ch == '"')) |
553 | { |
727 | { |
554 | --dec->cur; |
728 | --dec_cur; |
555 | break; |
729 | break; |
556 | } |
730 | } |
557 | else if (ch == '\\') |
731 | else if (expect_false (ch == '\\')) |
558 | { |
732 | { |
559 | switch (*dec->cur) |
733 | switch (*dec_cur) |
560 | { |
734 | { |
561 | case '\\': |
735 | case '\\': |
562 | case '/': |
736 | case '/': |
563 | case '"': *cur++ = *dec->cur++; break; |
737 | case '"': *cur++ = *dec_cur++; break; |
564 | |
738 | |
565 | case 'b': ++dec->cur; *cur++ = '\010'; break; |
739 | case 'b': ++dec_cur; *cur++ = '\010'; break; |
566 | case 't': ++dec->cur; *cur++ = '\011'; break; |
740 | case 't': ++dec_cur; *cur++ = '\011'; break; |
567 | case 'n': ++dec->cur; *cur++ = '\012'; break; |
741 | case 'n': ++dec_cur; *cur++ = '\012'; break; |
568 | case 'f': ++dec->cur; *cur++ = '\014'; break; |
742 | case 'f': ++dec_cur; *cur++ = '\014'; break; |
569 | case 'r': ++dec->cur; *cur++ = '\015'; break; |
743 | case 'r': ++dec_cur; *cur++ = '\015'; break; |
570 | |
744 | |
571 | case 'u': |
745 | case 'u': |
572 | { |
746 | { |
573 | UV lo, hi; |
747 | UV lo, hi; |
574 | ++dec->cur; |
748 | ++dec_cur; |
575 | |
749 | |
|
|
750 | dec->cur = dec_cur; |
576 | hi = decode_4hex (dec); |
751 | hi = decode_4hex (dec); |
|
|
752 | dec_cur = dec->cur; |
577 | if (hi == (UV)-1) |
753 | if (hi == (UV)-1) |
578 | goto fail; |
754 | goto fail; |
579 | |
755 | |
580 | // possibly a surrogate pair |
756 | // possibly a surrogate pair |
581 | if (hi >= 0xd800) |
757 | if (hi >= 0xd800) |
582 | if (hi < 0xdc00) |
758 | if (hi < 0xdc00) |
583 | { |
759 | { |
584 | if (dec->cur [0] != '\\' || dec->cur [1] != 'u') |
760 | if (dec_cur [0] != '\\' || dec_cur [1] != 'u') |
585 | ERR ("missing low surrogate character in surrogate pair"); |
761 | ERR ("missing low surrogate character in surrogate pair"); |
586 | |
762 | |
587 | dec->cur += 2; |
763 | dec_cur += 2; |
588 | |
764 | |
|
|
765 | dec->cur = dec_cur; |
589 | lo = decode_4hex (dec); |
766 | lo = decode_4hex (dec); |
|
|
767 | dec_cur = dec->cur; |
590 | if (lo == (UV)-1) |
768 | if (lo == (UV)-1) |
591 | goto fail; |
769 | goto fail; |
592 | |
770 | |
593 | if (lo < 0xdc00 || lo >= 0xe000) |
771 | if (lo < 0xdc00 || lo >= 0xe000) |
594 | ERR ("surrogate pair expected"); |
772 | ERR ("surrogate pair expected"); |
… | |
… | |
608 | *cur++ = hi; |
786 | *cur++ = hi; |
609 | } |
787 | } |
610 | break; |
788 | break; |
611 | |
789 | |
612 | default: |
790 | default: |
613 | --dec->cur; |
791 | --dec_cur; |
614 | ERR ("illegal backslash escape sequence in string"); |
792 | ERR ("illegal backslash escape sequence in string"); |
615 | } |
793 | } |
616 | } |
794 | } |
617 | else if (ch >= 0x20 && ch <= 0x7f) |
795 | else if (expect_true (ch >= 0x20 && ch <= 0x7f)) |
618 | *cur++ = ch; |
796 | *cur++ = ch; |
619 | else if (ch >= 0x80) |
797 | else if (ch >= 0x80) |
620 | { |
798 | { |
621 | --dec->cur; |
|
|
622 | |
|
|
623 | STRLEN clen; |
799 | STRLEN clen; |
624 | UV uch = utf8n_to_uvuni (dec->cur, dec->end - dec->cur, &clen, UTF8_CHECK_ONLY); |
800 | UV uch; |
|
|
801 | |
|
|
802 | --dec_cur; |
|
|
803 | |
|
|
804 | uch = decode_utf8 (dec_cur, dec->end - dec_cur, &clen); |
625 | if (clen == (STRLEN)-1) |
805 | if (clen == (STRLEN)-1) |
626 | ERR ("malformed UTF-8 character in JSON string"); |
806 | ERR ("malformed UTF-8 character in JSON string"); |
627 | |
807 | |
628 | do |
808 | do |
629 | { |
|
|
630 | *cur++ = *dec->cur++; |
809 | *cur++ = *dec_cur++; |
631 | } |
|
|
632 | while (--clen); |
810 | while (--clen); |
633 | |
811 | |
634 | utf8 = 1; |
812 | utf8 = 1; |
635 | } |
813 | } |
636 | else if (!ch) |
|
|
637 | ERR ("unexpected end of string while parsing json string"); |
|
|
638 | else |
814 | else |
|
|
815 | { |
|
|
816 | --dec_cur; |
|
|
817 | |
|
|
818 | if (!ch) |
|
|
819 | ERR ("unexpected end of string while parsing JSON string"); |
|
|
820 | else |
639 | ERR ("invalid character encountered"); |
821 | ERR ("invalid character encountered while parsing JSON string"); |
640 | |
822 | } |
641 | } |
823 | } |
642 | while (cur < buf + SHORT_STRING_LEN); |
824 | while (cur < buf + SHORT_STRING_LEN); |
643 | |
825 | |
|
|
826 | { |
644 | STRLEN len = cur - buf; |
827 | STRLEN len = cur - buf; |
645 | |
828 | |
646 | if (sv) |
829 | if (sv) |
647 | { |
830 | { |
648 | SvGROW (sv, SvCUR (sv) + len + 1); |
831 | SvGROW (sv, SvCUR (sv) + len + 1); |
649 | memcpy (SvPVX (sv) + SvCUR (sv), buf, len); |
832 | memcpy (SvPVX (sv) + SvCUR (sv), buf, len); |
650 | SvCUR_set (sv, SvCUR (sv) + len); |
833 | SvCUR_set (sv, SvCUR (sv) + len); |
651 | } |
834 | } |
652 | else |
835 | else |
653 | sv = newSVpvn (buf, len); |
836 | sv = newSVpvn (buf, len); |
654 | } |
837 | } |
|
|
838 | } |
655 | while (*dec->cur != '"'); |
839 | while (*dec_cur != '"'); |
656 | |
840 | |
657 | ++dec->cur; |
841 | ++dec_cur; |
658 | |
842 | |
659 | if (sv) |
843 | if (sv) |
660 | { |
844 | { |
661 | SvPOK_only (sv); |
845 | SvPOK_only (sv); |
662 | *SvEND (sv) = 0; |
846 | *SvEND (sv) = 0; |
… | |
… | |
665 | SvUTF8_on (sv); |
849 | SvUTF8_on (sv); |
666 | } |
850 | } |
667 | else |
851 | else |
668 | sv = newSVpvn ("", 0); |
852 | sv = newSVpvn ("", 0); |
669 | |
853 | |
|
|
854 | dec->cur = dec_cur; |
670 | return sv; |
855 | return sv; |
671 | |
856 | |
672 | fail: |
857 | fail: |
|
|
858 | dec->cur = dec_cur; |
673 | return 0; |
859 | return 0; |
674 | } |
860 | } |
675 | |
861 | |
676 | static SV * |
862 | static SV * |
677 | decode_num (dec_t *dec) |
863 | decode_num (dec_t *dec) |
… | |
… | |
735 | is_nv = 1; |
921 | is_nv = 1; |
736 | } |
922 | } |
737 | |
923 | |
738 | if (!is_nv) |
924 | if (!is_nv) |
739 | { |
925 | { |
740 | UV uv; |
926 | // special case the rather common 1..4-digit-int case, assumes 32 bit ints or so |
741 | int numtype = grok_number (start, dec->cur - start, &uv); |
927 | if (*start == '-') |
742 | if (numtype & IS_NUMBER_IN_UV) |
928 | switch (dec->cur - start) |
743 | if (numtype & IS_NUMBER_NEG) |
|
|
744 | { |
929 | { |
745 | if (uv < (UV)IV_MIN) |
930 | case 2: return newSViv (-( start [1] - '0' * 1)); |
746 | return newSViv (-(IV)uv); |
931 | case 3: return newSViv (-( start [1] * 10 + start [2] - '0' * 11)); |
|
|
932 | case 4: return newSViv (-( start [1] * 100 + start [2] * 10 + start [3] - '0' * 111)); |
|
|
933 | case 5: return newSViv (-(start [1] * 1000 + start [2] * 100 + start [3] * 10 + start [4] - '0' * 1111)); |
747 | } |
934 | } |
|
|
935 | else |
|
|
936 | switch (dec->cur - start) |
|
|
937 | { |
|
|
938 | case 1: return newSViv ( start [0] - '0' * 1); |
|
|
939 | case 2: return newSViv ( start [0] * 10 + start [1] - '0' * 11); |
|
|
940 | case 3: return newSViv ( start [0] * 100 + start [1] * 10 + start [2] - '0' * 111); |
|
|
941 | case 4: return newSViv ( start [0] * 1000 + start [1] * 100 + start [2] * 10 + start [3] - '0' * 1111); |
|
|
942 | } |
|
|
943 | |
|
|
944 | { |
|
|
945 | UV uv; |
|
|
946 | int numtype = grok_number (start, dec->cur - start, &uv); |
|
|
947 | if (numtype & IS_NUMBER_IN_UV) |
|
|
948 | if (numtype & IS_NUMBER_NEG) |
|
|
949 | { |
|
|
950 | if (uv < (UV)IV_MIN) |
|
|
951 | return newSViv (-(IV)uv); |
|
|
952 | } |
748 | else |
953 | else |
749 | return newSVuv (uv); |
954 | return newSVuv (uv); |
|
|
955 | |
|
|
956 | // here would likely be the place for bigint support |
750 | } |
957 | } |
|
|
958 | } |
751 | |
959 | |
|
|
960 | // if we ever support bigint or bigfloat, this is the place for bigfloat |
752 | return newSVnv (Atof (start)); |
961 | return newSVnv (Atof (start)); |
753 | |
962 | |
754 | fail: |
963 | fail: |
755 | return 0; |
964 | return 0; |
756 | } |
965 | } |
… | |
… | |
758 | static SV * |
967 | static SV * |
759 | decode_av (dec_t *dec) |
968 | decode_av (dec_t *dec) |
760 | { |
969 | { |
761 | AV *av = newAV (); |
970 | AV *av = newAV (); |
762 | |
971 | |
|
|
972 | DEC_INC_DEPTH; |
763 | decode_ws (dec); |
973 | decode_ws (dec); |
|
|
974 | |
764 | if (*dec->cur == ']') |
975 | if (*dec->cur == ']') |
765 | ++dec->cur; |
976 | ++dec->cur; |
766 | else |
977 | else |
767 | for (;;) |
978 | for (;;) |
768 | { |
979 | { |
… | |
… | |
786 | ERR (", or ] expected while parsing array"); |
997 | ERR (", or ] expected while parsing array"); |
787 | |
998 | |
788 | ++dec->cur; |
999 | ++dec->cur; |
789 | } |
1000 | } |
790 | |
1001 | |
|
|
1002 | DEC_DEC_DEPTH; |
791 | return newRV_noinc ((SV *)av); |
1003 | return newRV_noinc ((SV *)av); |
792 | |
1004 | |
793 | fail: |
1005 | fail: |
794 | SvREFCNT_dec (av); |
1006 | SvREFCNT_dec (av); |
|
|
1007 | DEC_DEC_DEPTH; |
795 | return 0; |
1008 | return 0; |
796 | } |
1009 | } |
797 | |
1010 | |
798 | static SV * |
1011 | static SV * |
799 | decode_hv (dec_t *dec) |
1012 | decode_hv (dec_t *dec) |
800 | { |
1013 | { |
|
|
1014 | SV *sv; |
801 | HV *hv = newHV (); |
1015 | HV *hv = newHV (); |
802 | |
1016 | |
|
|
1017 | DEC_INC_DEPTH; |
803 | decode_ws (dec); |
1018 | decode_ws (dec); |
|
|
1019 | |
804 | if (*dec->cur == '}') |
1020 | if (*dec->cur == '}') |
805 | ++dec->cur; |
1021 | ++dec->cur; |
806 | else |
1022 | else |
807 | for (;;) |
1023 | for (;;) |
808 | { |
1024 | { |
809 | SV *key, *value; |
|
|
810 | |
|
|
811 | decode_ws (dec); EXPECT_CH ('"'); |
1025 | decode_ws (dec); EXPECT_CH ('"'); |
812 | |
1026 | |
813 | key = decode_str (dec); |
1027 | // heuristic: assume that |
814 | if (!key) |
1028 | // a) decode_str + hv_store_ent are abysmally slow. |
815 | goto fail; |
1029 | // b) most hash keys are short, simple ascii text. |
|
|
1030 | // => try to "fast-match" such strings to avoid |
|
|
1031 | // the overhead of decode_str + hv_store_ent. |
|
|
1032 | { |
|
|
1033 | SV *value; |
|
|
1034 | char *p = dec->cur; |
|
|
1035 | char *e = p + 24; // only try up to 24 bytes |
816 | |
1036 | |
817 | decode_ws (dec); EXPECT_CH (':'); |
1037 | for (;;) |
818 | |
|
|
819 | value = decode_sv (dec); |
|
|
820 | if (!value) |
|
|
821 | { |
1038 | { |
|
|
1039 | // the >= 0x80 is true on most architectures |
|
|
1040 | if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\') |
|
|
1041 | { |
|
|
1042 | // slow path, back up and use decode_str |
|
|
1043 | SV *key = decode_str (dec); |
|
|
1044 | if (!key) |
|
|
1045 | goto fail; |
|
|
1046 | |
|
|
1047 | decode_ws (dec); EXPECT_CH (':'); |
|
|
1048 | |
|
|
1049 | value = decode_sv (dec); |
|
|
1050 | if (!value) |
|
|
1051 | { |
|
|
1052 | SvREFCNT_dec (key); |
|
|
1053 | goto fail; |
|
|
1054 | } |
|
|
1055 | |
|
|
1056 | hv_store_ent (hv, key, value, 0); |
822 | SvREFCNT_dec (key); |
1057 | SvREFCNT_dec (key); |
|
|
1058 | |
|
|
1059 | break; |
|
|
1060 | } |
|
|
1061 | else if (*p == '"') |
|
|
1062 | { |
|
|
1063 | // fast path, got a simple key |
|
|
1064 | char *key = dec->cur; |
|
|
1065 | int len = p - key; |
|
|
1066 | dec->cur = p + 1; |
|
|
1067 | |
|
|
1068 | decode_ws (dec); EXPECT_CH (':'); |
|
|
1069 | |
|
|
1070 | value = decode_sv (dec); |
|
|
1071 | if (!value) |
823 | goto fail; |
1072 | goto fail; |
|
|
1073 | |
|
|
1074 | hv_store (hv, key, len, value, 0); |
|
|
1075 | |
|
|
1076 | break; |
|
|
1077 | } |
|
|
1078 | |
|
|
1079 | ++p; |
824 | } |
1080 | } |
825 | |
1081 | } |
826 | //TODO: optimise |
|
|
827 | hv_store_ent (hv, key, value, 0); |
|
|
828 | |
1082 | |
829 | decode_ws (dec); |
1083 | decode_ws (dec); |
830 | |
1084 | |
831 | if (*dec->cur == '}') |
1085 | if (*dec->cur == '}') |
832 | { |
1086 | { |
… | |
… | |
838 | ERR (", or } expected while parsing object/hash"); |
1092 | ERR (", or } expected while parsing object/hash"); |
839 | |
1093 | |
840 | ++dec->cur; |
1094 | ++dec->cur; |
841 | } |
1095 | } |
842 | |
1096 | |
|
|
1097 | DEC_DEC_DEPTH; |
|
|
1098 | sv = newRV_noinc ((SV *)hv); |
|
|
1099 | |
|
|
1100 | // check filter callbacks |
|
|
1101 | if (dec->json.flags & F_HOOK) |
|
|
1102 | { |
|
|
1103 | ENTER; SAVETMPS; |
|
|
1104 | |
|
|
1105 | if (HvKEYS (hv) == 1 && dec->json.cb_sk_object) |
|
|
1106 | { |
|
|
1107 | int count; |
|
|
1108 | |
|
|
1109 | dSP; PUSHMARK (SP); |
|
|
1110 | XPUSHs (sv_2mortal (sv)); |
|
|
1111 | |
|
|
1112 | PUTBACK; count = call_sv (dec->json.cb_sk_object, G_ARRAY); SPAGAIN; |
|
|
1113 | |
|
|
1114 | if (count == 1) |
|
|
1115 | sv = newSVsv (POPs); |
|
|
1116 | else |
|
|
1117 | SvREFCNT_inc (sv); |
|
|
1118 | } |
|
|
1119 | |
|
|
1120 | if (dec->json.cb_object) |
|
|
1121 | { |
|
|
1122 | int count; |
|
|
1123 | |
|
|
1124 | dSP; ENTER; SAVETMPS; PUSHMARK (SP); |
|
|
1125 | XPUSHs (sv_2mortal (sv)); |
|
|
1126 | |
|
|
1127 | PUTBACK; count = call_sv (dec->json.cb_object, G_ARRAY); SPAGAIN; |
|
|
1128 | |
|
|
1129 | if (count == 1) |
|
|
1130 | sv = newSVsv (POPs); |
|
|
1131 | else |
|
|
1132 | SvREFCNT_inc (sv); |
|
|
1133 | } |
|
|
1134 | |
|
|
1135 | FREETMPS; LEAVE; |
|
|
1136 | } |
|
|
1137 | |
843 | return newRV_noinc ((SV *)hv); |
1138 | return newRV_noinc ((SV *)hv); |
844 | |
1139 | |
845 | fail: |
1140 | fail: |
846 | SvREFCNT_dec (hv); |
1141 | SvREFCNT_dec (hv); |
|
|
1142 | DEC_DEC_DEPTH; |
847 | return 0; |
1143 | return 0; |
848 | } |
1144 | } |
849 | |
1145 | |
850 | static SV * |
1146 | static SV * |
851 | decode_sv (dec_t *dec) |
1147 | decode_sv (dec_t *dec) |
852 | { |
1148 | { |
853 | decode_ws (dec); |
1149 | decode_ws (dec); |
|
|
1150 | |
|
|
1151 | // the beauty of JSON: you need exactly one character lookahead |
|
|
1152 | // to parse anything. |
854 | switch (*dec->cur) |
1153 | switch (*dec->cur) |
855 | { |
1154 | { |
856 | case '"': ++dec->cur; return decode_str (dec); |
1155 | case '"': ++dec->cur; return decode_str (dec); |
857 | case '[': ++dec->cur; return decode_av (dec); |
1156 | case '[': ++dec->cur; return decode_av (dec); |
858 | case '{': ++dec->cur; return decode_hv (dec); |
1157 | case '{': ++dec->cur; return decode_hv (dec); |
… | |
… | |
864 | |
1163 | |
865 | case 't': |
1164 | case 't': |
866 | if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
1165 | if (dec->end - dec->cur >= 4 && !memcmp (dec->cur, "true", 4)) |
867 | { |
1166 | { |
868 | dec->cur += 4; |
1167 | dec->cur += 4; |
869 | return newSViv (1); |
1168 | return SvREFCNT_inc (json_true); |
870 | } |
1169 | } |
871 | else |
1170 | else |
872 | ERR ("'true' expected"); |
1171 | ERR ("'true' expected"); |
873 | |
1172 | |
874 | break; |
1173 | break; |
875 | |
1174 | |
876 | case 'f': |
1175 | case 'f': |
877 | if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
1176 | if (dec->end - dec->cur >= 5 && !memcmp (dec->cur, "false", 5)) |
878 | { |
1177 | { |
879 | dec->cur += 5; |
1178 | dec->cur += 5; |
880 | return newSViv (0); |
1179 | return SvREFCNT_inc (json_false); |
881 | } |
1180 | } |
882 | else |
1181 | else |
883 | ERR ("'false' expected"); |
1182 | ERR ("'false' expected"); |
884 | |
1183 | |
885 | break; |
1184 | break; |
… | |
… | |
894 | ERR ("'null' expected"); |
1193 | ERR ("'null' expected"); |
895 | |
1194 | |
896 | break; |
1195 | break; |
897 | |
1196 | |
898 | default: |
1197 | default: |
899 | ERR ("malformed json string, neither array, object, number, string or atom"); |
1198 | ERR ("malformed JSON string, neither array, object, number, string or atom"); |
900 | break; |
1199 | break; |
901 | } |
1200 | } |
902 | |
1201 | |
903 | fail: |
1202 | fail: |
904 | return 0; |
1203 | return 0; |
905 | } |
1204 | } |
906 | |
1205 | |
907 | static SV * |
1206 | static SV * |
908 | decode_json (SV *string, UV flags) |
1207 | decode_json (SV *string, JSON *json, UV *offset_return) |
909 | { |
1208 | { |
|
|
1209 | dec_t dec; |
|
|
1210 | UV offset; |
910 | SV *sv; |
1211 | SV *sv; |
911 | |
1212 | |
|
|
1213 | SvGETMAGIC (string); |
|
|
1214 | SvUPGRADE (string, SVt_PV); |
|
|
1215 | |
|
|
1216 | if (json->flags & F_MAXSIZE && SvCUR (string) > DEC_SIZE (json->flags)) |
|
|
1217 | croak ("attempted decode of JSON text of %lu bytes size, but max_size is set to %lu", |
|
|
1218 | (unsigned long)SvCUR (string), (unsigned long)DEC_SIZE (json->flags)); |
|
|
1219 | |
912 | if (flags & F_UTF8) |
1220 | if (json->flags & F_UTF8) |
913 | sv_utf8_downgrade (string, 0); |
1221 | sv_utf8_downgrade (string, 0); |
914 | else |
1222 | else |
915 | sv_utf8_upgrade (string); |
1223 | sv_utf8_upgrade (string); |
916 | |
1224 | |
917 | SvGROW (string, SvCUR (string) + 1); // should basically be a NOP |
1225 | SvGROW (string, SvCUR (string) + 1); // should basically be a NOP |
918 | |
1226 | |
919 | dec_t dec; |
1227 | dec.json = *json; |
920 | dec.flags = flags; |
|
|
921 | dec.cur = SvPVX (string); |
1228 | dec.cur = SvPVX (string); |
922 | dec.end = SvEND (string); |
1229 | dec.end = SvEND (string); |
923 | dec.err = 0; |
1230 | dec.err = 0; |
|
|
1231 | dec.depth = 0; |
|
|
1232 | dec.maxdepth = DEC_DEPTH (dec.json.flags); |
924 | |
1233 | |
|
|
1234 | if (dec.json.cb_object || dec.json.cb_sk_object) |
|
|
1235 | dec.json.flags |= F_HOOK; |
|
|
1236 | |
|
|
1237 | *dec.end = 0; // this should basically be a nop, too, but make sure it's there |
925 | sv = decode_sv (&dec); |
1238 | sv = decode_sv (&dec); |
926 | |
1239 | |
|
|
1240 | if (!(offset_return || !sv)) |
|
|
1241 | { |
|
|
1242 | // check for trailing garbage |
|
|
1243 | decode_ws (&dec); |
|
|
1244 | |
|
|
1245 | if (*dec.cur) |
|
|
1246 | { |
|
|
1247 | dec.err = "garbage after JSON object"; |
|
|
1248 | SvREFCNT_dec (sv); |
|
|
1249 | sv = 0; |
|
|
1250 | } |
|
|
1251 | } |
|
|
1252 | |
|
|
1253 | if (offset_return || !sv) |
|
|
1254 | { |
|
|
1255 | offset = dec.json.flags & F_UTF8 |
|
|
1256 | ? dec.cur - SvPVX (string) |
|
|
1257 | : utf8_distance (dec.cur, SvPVX (string)); |
|
|
1258 | |
|
|
1259 | if (offset_return) |
|
|
1260 | *offset_return = offset; |
|
|
1261 | } |
|
|
1262 | |
927 | if (!sv) |
1263 | if (!sv) |
928 | { |
1264 | { |
929 | IV offset = dec.flags & F_UTF8 |
|
|
930 | ? dec.cur - SvPVX (string) |
|
|
931 | : utf8_distance (dec.cur, SvPVX (string)); |
|
|
932 | SV *uni = sv_newmortal (); |
1265 | SV *uni = sv_newmortal (); |
933 | |
1266 | |
934 | // horrible hack to silence warning inside pv_uni_display |
1267 | // horrible hack to silence warning inside pv_uni_display |
935 | COP cop = *PL_curcop; |
1268 | COP cop = *PL_curcop; |
936 | cop.cop_warnings = pWARN_NONE; |
1269 | cop.cop_warnings = pWARN_NONE; |
… | |
… | |
938 | SAVEVPTR (PL_curcop); |
1271 | SAVEVPTR (PL_curcop); |
939 | PL_curcop = &cop; |
1272 | PL_curcop = &cop; |
940 | pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); |
1273 | pv_uni_display (uni, dec.cur, dec.end - dec.cur, 20, UNI_DISPLAY_QQ); |
941 | LEAVE; |
1274 | LEAVE; |
942 | |
1275 | |
943 | croak ("%s, at character offset %d (%s)", |
1276 | croak ("%s, at character offset %d [\"%s\"]", |
944 | dec.err, |
1277 | dec.err, |
945 | (int)offset, |
1278 | (int)offset, |
946 | dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); |
1279 | dec.cur != dec.end ? SvPV_nolen (uni) : "(end of string)"); |
947 | } |
1280 | } |
948 | |
1281 | |
949 | sv = sv_2mortal (sv); |
1282 | sv = sv_2mortal (sv); |
950 | |
1283 | |
951 | if (!(dec.flags & F_ALLOW_NONREF) && !SvROK (sv)) |
1284 | if (!(dec.json.flags & F_ALLOW_NONREF) && !SvROK (sv)) |
952 | croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)"); |
1285 | croak ("JSON text must be an object or array (but found number, string, true, false or null, use allow_nonref to allow this)"); |
953 | |
1286 | |
954 | return sv; |
1287 | return sv; |
955 | } |
1288 | } |
956 | |
1289 | |
… | |
… | |
961 | |
1294 | |
962 | BOOT: |
1295 | BOOT: |
963 | { |
1296 | { |
964 | int i; |
1297 | int i; |
965 | |
1298 | |
966 | memset (decode_hexdigit, 0xff, 256); |
|
|
967 | for (i = 10; i--; ) |
1299 | for (i = 0; i < 256; ++i) |
968 | decode_hexdigit ['0' + i] = i; |
1300 | decode_hexdigit [i] = |
|
|
1301 | i >= '0' && i <= '9' ? i - '0' |
|
|
1302 | : i >= 'a' && i <= 'f' ? i - 'a' + 10 |
|
|
1303 | : i >= 'A' && i <= 'F' ? i - 'A' + 10 |
|
|
1304 | : -1; |
969 | |
1305 | |
970 | for (i = 7; i--; ) |
1306 | json_stash = gv_stashpv ("JSON::XS" , 1); |
|
|
1307 | json_boolean_stash = gv_stashpv ("JSON::XS::Boolean", 1); |
|
|
1308 | |
|
|
1309 | json_true = get_sv ("JSON::XS::true" , 1); SvREADONLY_on (json_true ); |
|
|
1310 | json_false = get_sv ("JSON::XS::false", 1); SvREADONLY_on (json_false); |
|
|
1311 | } |
|
|
1312 | |
|
|
1313 | PROTOTYPES: DISABLE |
|
|
1314 | |
|
|
1315 | void new (char *klass) |
|
|
1316 | PPCODE: |
|
|
1317 | { |
|
|
1318 | SV *pv = NEWSV (0, sizeof (JSON)); |
|
|
1319 | SvPOK_only (pv); |
|
|
1320 | Zero (SvPVX (pv), 1, JSON); |
|
|
1321 | ((JSON *)SvPVX (pv))->flags = F_DEFAULT; |
|
|
1322 | XPUSHs (sv_2mortal (sv_bless (newRV_noinc (pv), json_stash))); |
|
|
1323 | } |
|
|
1324 | |
|
|
1325 | void ascii (JSON *self, int enable = 1) |
|
|
1326 | ALIAS: |
|
|
1327 | ascii = F_ASCII |
|
|
1328 | latin1 = F_LATIN1 |
|
|
1329 | utf8 = F_UTF8 |
|
|
1330 | indent = F_INDENT |
|
|
1331 | canonical = F_CANONICAL |
|
|
1332 | space_before = F_SPACE_BEFORE |
|
|
1333 | space_after = F_SPACE_AFTER |
|
|
1334 | pretty = F_PRETTY |
|
|
1335 | allow_nonref = F_ALLOW_NONREF |
|
|
1336 | shrink = F_SHRINK |
|
|
1337 | allow_blessed = F_ALLOW_BLESSED |
|
|
1338 | convert_blessed = F_CONV_BLESSED |
|
|
1339 | PPCODE: |
|
|
1340 | { |
|
|
1341 | if (enable) |
|
|
1342 | self->flags |= ix; |
|
|
1343 | else |
|
|
1344 | self->flags &= ~ix; |
|
|
1345 | |
|
|
1346 | XPUSHs (ST (0)); |
|
|
1347 | } |
|
|
1348 | |
|
|
1349 | void max_depth (JSON *self, UV max_depth = 0x80000000UL) |
|
|
1350 | PPCODE: |
|
|
1351 | { |
|
|
1352 | UV log2 = 0; |
|
|
1353 | |
|
|
1354 | if (max_depth > 0x80000000UL) max_depth = 0x80000000UL; |
|
|
1355 | |
|
|
1356 | while ((1UL << log2) < max_depth) |
|
|
1357 | ++log2; |
|
|
1358 | |
|
|
1359 | self->flags = self->flags & ~F_MAXDEPTH | (log2 << S_MAXDEPTH); |
|
|
1360 | |
|
|
1361 | XPUSHs (ST (0)); |
|
|
1362 | } |
|
|
1363 | |
|
|
1364 | void max_size (JSON *self, UV max_size = 0) |
|
|
1365 | PPCODE: |
|
|
1366 | { |
|
|
1367 | UV log2 = 0; |
|
|
1368 | |
|
|
1369 | if (max_size > 0x80000000UL) max_size = 0x80000000UL; |
|
|
1370 | if (max_size == 1) max_size = 2; |
|
|
1371 | |
|
|
1372 | while ((1UL << log2) < max_size) |
|
|
1373 | ++log2; |
|
|
1374 | |
|
|
1375 | self->flags = self->flags & ~F_MAXSIZE | (log2 << S_MAXSIZE); |
|
|
1376 | |
|
|
1377 | XPUSHs (ST (0)); |
|
|
1378 | } |
|
|
1379 | |
|
|
1380 | void filter_json_objects (JSON *self, SV *cb = &PL_sv_undef) |
|
|
1381 | ALIAS: |
|
|
1382 | filter_sk_json_objects = 1 |
|
|
1383 | PPCODE: |
|
|
1384 | { |
|
|
1385 | if (!SvOK (cb)) |
|
|
1386 | cb = 0; |
|
|
1387 | |
|
|
1388 | switch (ix) |
971 | { |
1389 | { |
972 | decode_hexdigit ['a' + i] = 10 + i; |
1390 | case 0: self->cb_object = cb; break; |
973 | decode_hexdigit ['A' + i] = 10 + i; |
1391 | case 1: self->cb_sk_object = cb; break; |
974 | } |
1392 | } |
975 | |
1393 | |
976 | json_stash = gv_stashpv ("JSON::XS", 1); |
1394 | XPUSHs (ST (0)); |
977 | } |
1395 | } |
978 | |
1396 | |
979 | PROTOTYPES: DISABLE |
|
|
980 | |
|
|
981 | SV *new (char *dummy) |
|
|
982 | CODE: |
|
|
983 | RETVAL = sv_bless (newRV_noinc (newSVuv (F_DEFAULT)), json_stash); |
|
|
984 | OUTPUT: |
|
|
985 | RETVAL |
|
|
986 | |
|
|
987 | SV *ascii (SV *self, int enable = 1) |
|
|
988 | ALIAS: |
|
|
989 | ascii = F_ASCII |
|
|
990 | utf8 = F_UTF8 |
|
|
991 | indent = F_INDENT |
|
|
992 | canonical = F_CANONICAL |
|
|
993 | space_before = F_SPACE_BEFORE |
|
|
994 | space_after = F_SPACE_AFTER |
|
|
995 | pretty = F_PRETTY |
|
|
996 | allow_nonref = F_ALLOW_NONREF |
|
|
997 | shrink = F_SHRINK |
|
|
998 | CODE: |
|
|
999 | { |
|
|
1000 | UV *uv = SvJSON (self); |
|
|
1001 | if (enable) |
|
|
1002 | *uv |= ix; |
|
|
1003 | else |
|
|
1004 | *uv &= ~ix; |
|
|
1005 | |
|
|
1006 | RETVAL = newSVsv (self); |
|
|
1007 | } |
|
|
1008 | OUTPUT: |
|
|
1009 | RETVAL |
|
|
1010 | |
|
|
1011 | void encode (SV *self, SV *scalar) |
1397 | void encode (JSON *self, SV *scalar) |
1012 | PPCODE: |
1398 | PPCODE: |
1013 | XPUSHs (encode_json (scalar, *SvJSON (self))); |
1399 | XPUSHs (encode_json (scalar, self)); |
1014 | |
1400 | |
1015 | void decode (SV *self, SV *jsonstr) |
1401 | void decode (JSON *self, SV *jsonstr) |
1016 | PPCODE: |
1402 | PPCODE: |
1017 | XPUSHs (decode_json (jsonstr, *SvJSON (self))); |
1403 | XPUSHs (decode_json (jsonstr, self, 0)); |
|
|
1404 | |
|
|
1405 | void decode_prefix (JSON *self, SV *jsonstr) |
|
|
1406 | PPCODE: |
|
|
1407 | { |
|
|
1408 | UV offset; |
|
|
1409 | EXTEND (SP, 2); |
|
|
1410 | PUSHs (decode_json (jsonstr, self, &offset)); |
|
|
1411 | PUSHs (sv_2mortal (newSVuv (offset))); |
|
|
1412 | } |
1018 | |
1413 | |
1019 | PROTOTYPES: ENABLE |
1414 | PROTOTYPES: ENABLE |
1020 | |
1415 | |
1021 | void to_json (SV *scalar) |
1416 | void to_json (SV *scalar) |
1022 | PPCODE: |
1417 | PPCODE: |
|
|
1418 | { |
|
|
1419 | JSON json = { F_DEFAULT | F_UTF8 }; |
1023 | XPUSHs (encode_json (scalar, F_UTF8)); |
1420 | XPUSHs (encode_json (scalar, &json)); |
|
|
1421 | } |
1024 | |
1422 | |
1025 | void from_json (SV *jsonstr) |
1423 | void from_json (SV *jsonstr) |
1026 | PPCODE: |
1424 | PPCODE: |
|
|
1425 | { |
|
|
1426 | JSON json = { F_DEFAULT | F_UTF8 }; |
1027 | XPUSHs (decode_json (jsonstr, F_UTF8)); |
1427 | XPUSHs (decode_json (jsonstr, &json, 0)); |
|
|
1428 | } |
1028 | |
1429 | |