linux-user: Add default configs for mips64[el]
[qemu.git] / qjson.c
1 /*
2 * QObject JSON integration
3 *
4 * Copyright IBM, Corp. 2009
5 *
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
10 * See the COPYING.LIB file in the top-level directory.
11 *
12 */
13
14 #include "json-lexer.h"
15 #include "json-parser.h"
16 #include "json-streamer.h"
17 #include "qjson.h"
18 #include "qint.h"
19 #include "qlist.h"
20 #include "qbool.h"
21 #include "qfloat.h"
22 #include "qdict.h"
23
24 typedef struct JSONParsingState
25 {
26 JSONMessageParser parser;
27 va_list *ap;
28 QObject *result;
29 } JSONParsingState;
30
31 static void parse_json(JSONMessageParser *parser, QList *tokens)
32 {
33 JSONParsingState *s = container_of(parser, JSONParsingState, parser);
34 s->result = json_parser_parse(tokens, s->ap);
35 }
36
37 QObject *qobject_from_jsonv(const char *string, va_list *ap)
38 {
39 JSONParsingState state = {};
40
41 state.ap = ap;
42
43 json_message_parser_init(&state.parser, parse_json);
44 json_message_parser_feed(&state.parser, string, strlen(string));
45 json_message_parser_flush(&state.parser);
46 json_message_parser_destroy(&state.parser);
47
48 return state.result;
49 }
50
51 QObject *qobject_from_json(const char *string)
52 {
53 return qobject_from_jsonv(string, NULL);
54 }
55
56 /*
57 * IMPORTANT: This function aborts on error, thus it must not
58 * be used with untrusted arguments.
59 */
60 QObject *qobject_from_jsonf(const char *string, ...)
61 {
62 QObject *obj;
63 va_list ap;
64
65 va_start(ap, string);
66 obj = qobject_from_jsonv(string, &ap);
67 va_end(ap);
68
69 assert(obj != NULL);
70 return obj;
71 }
72
73 typedef struct ToJsonIterState
74 {
75 int indent;
76 int pretty;
77 int count;
78 QString *str;
79 } ToJsonIterState;
80
81 static void to_json(const QObject *obj, QString *str, int pretty, int indent);
82
83 static void to_json_dict_iter(const char *key, QObject *obj, void *opaque)
84 {
85 ToJsonIterState *s = opaque;
86 QString *qkey;
87 int j;
88
89 if (s->count)
90 qstring_append(s->str, ", ");
91
92 if (s->pretty) {
93 qstring_append(s->str, "\n");
94 for (j = 0 ; j < s->indent ; j++)
95 qstring_append(s->str, " ");
96 }
97
98 qkey = qstring_from_str(key);
99 to_json(QOBJECT(qkey), s->str, s->pretty, s->indent);
100 QDECREF(qkey);
101
102 qstring_append(s->str, ": ");
103 to_json(obj, s->str, s->pretty, s->indent);
104 s->count++;
105 }
106
107 static void to_json_list_iter(QObject *obj, void *opaque)
108 {
109 ToJsonIterState *s = opaque;
110 int j;
111
112 if (s->count)
113 qstring_append(s->str, ", ");
114
115 if (s->pretty) {
116 qstring_append(s->str, "\n");
117 for (j = 0 ; j < s->indent ; j++)
118 qstring_append(s->str, " ");
119 }
120
121 to_json(obj, s->str, s->pretty, s->indent);
122 s->count++;
123 }
124
125 static void to_json(const QObject *obj, QString *str, int pretty, int indent)
126 {
127 switch (qobject_type(obj)) {
128 case QTYPE_QINT: {
129 QInt *val = qobject_to_qint(obj);
130 char buffer[1024];
131
132 snprintf(buffer, sizeof(buffer), "%" PRId64, qint_get_int(val));
133 qstring_append(str, buffer);
134 break;
135 }
136 case QTYPE_QSTRING: {
137 QString *val = qobject_to_qstring(obj);
138 const char *ptr;
139
140 ptr = qstring_get_str(val);
141 qstring_append(str, "\"");
142 while (*ptr) {
143 if ((ptr[0] & 0xE0) == 0xE0 &&
144 (ptr[1] & 0x80) && (ptr[2] & 0x80)) {
145 uint16_t wchar;
146 char escape[7];
147
148 wchar = (ptr[0] & 0x0F) << 12;
149 wchar |= (ptr[1] & 0x3F) << 6;
150 wchar |= (ptr[2] & 0x3F);
151 ptr += 2;
152
153 snprintf(escape, sizeof(escape), "\\u%04X", wchar);
154 qstring_append(str, escape);
155 } else if ((ptr[0] & 0xE0) == 0xC0 && (ptr[1] & 0x80)) {
156 uint16_t wchar;
157 char escape[7];
158
159 wchar = (ptr[0] & 0x1F) << 6;
160 wchar |= (ptr[1] & 0x3F);
161 ptr++;
162
163 snprintf(escape, sizeof(escape), "\\u%04X", wchar);
164 qstring_append(str, escape);
165 } else switch (ptr[0]) {
166 case '\"':
167 qstring_append(str, "\\\"");
168 break;
169 case '\\':
170 qstring_append(str, "\\\\");
171 break;
172 case '\b':
173 qstring_append(str, "\\b");
174 break;
175 case '\f':
176 qstring_append(str, "\\f");
177 break;
178 case '\n':
179 qstring_append(str, "\\n");
180 break;
181 case '\r':
182 qstring_append(str, "\\r");
183 break;
184 case '\t':
185 qstring_append(str, "\\t");
186 break;
187 default: {
188 if (ptr[0] <= 0x1F) {
189 char escape[7];
190 snprintf(escape, sizeof(escape), "\\u%04X", ptr[0]);
191 qstring_append(str, escape);
192 } else {
193 char buf[2] = { ptr[0], 0 };
194 qstring_append(str, buf);
195 }
196 break;
197 }
198 }
199 ptr++;
200 }
201 qstring_append(str, "\"");
202 break;
203 }
204 case QTYPE_QDICT: {
205 ToJsonIterState s;
206 QDict *val = qobject_to_qdict(obj);
207
208 s.count = 0;
209 s.str = str;
210 s.indent = indent + 1;
211 s.pretty = pretty;
212 qstring_append(str, "{");
213 qdict_iter(val, to_json_dict_iter, &s);
214 if (pretty) {
215 int j;
216 qstring_append(str, "\n");
217 for (j = 0 ; j < indent ; j++)
218 qstring_append(str, " ");
219 }
220 qstring_append(str, "}");
221 break;
222 }
223 case QTYPE_QLIST: {
224 ToJsonIterState s;
225 QList *val = qobject_to_qlist(obj);
226
227 s.count = 0;
228 s.str = str;
229 s.indent = indent + 1;
230 s.pretty = pretty;
231 qstring_append(str, "[");
232 qlist_iter(val, (void *)to_json_list_iter, &s);
233 if (pretty) {
234 int j;
235 qstring_append(str, "\n");
236 for (j = 0 ; j < indent ; j++)
237 qstring_append(str, " ");
238 }
239 qstring_append(str, "]");
240 break;
241 }
242 case QTYPE_QFLOAT: {
243 QFloat *val = qobject_to_qfloat(obj);
244 char buffer[1024];
245 int len;
246
247 len = snprintf(buffer, sizeof(buffer), "%f", qfloat_get_double(val));
248 while (len > 0 && buffer[len - 1] == '0') {
249 len--;
250 }
251
252 if (len && buffer[len - 1] == '.') {
253 buffer[len - 1] = 0;
254 } else {
255 buffer[len] = 0;
256 }
257
258 qstring_append(str, buffer);
259 break;
260 }
261 case QTYPE_QBOOL: {
262 QBool *val = qobject_to_qbool(obj);
263
264 if (qbool_get_int(val)) {
265 qstring_append(str, "true");
266 } else {
267 qstring_append(str, "false");
268 }
269 break;
270 }
271 case QTYPE_QERROR:
272 /* XXX: should QError be emitted? */
273 case QTYPE_NONE:
274 break;
275 }
276 }
277
278 QString *qobject_to_json(const QObject *obj)
279 {
280 QString *str = qstring_new();
281
282 to_json(obj, str, 0, 0);
283
284 return str;
285 }
286
287 QString *qobject_to_json_pretty(const QObject *obj)
288 {
289 QString *str = qstring_new();
290
291 to_json(obj, str, 1, 0);
292
293 return str;
294 }