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68396ea @rmustacc Initial commit of d32e8d0b8d9e0ef7cf7ab2e74548982972789dfc from qemu-kvm
rmustacc authored
1 /*
2 * JSON streaming support
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 "qlist.h"
15 #include "qint.h"
16 #include "qdict.h"
17 #include "qemu-common.h"
18 #include "json-lexer.h"
19 #include "json-streamer.h"
20
21 static void json_message_process_token(JSONLexer *lexer, QString *token, JSONTokenType type, int x, int y)
22 {
23 JSONMessageParser *parser = container_of(lexer, JSONMessageParser, lexer);
24 QDict *dict;
25
26 if (type == JSON_OPERATOR) {
27 switch (qstring_get_str(token)[0]) {
28 case '{':
29 parser->brace_count++;
30 break;
31 case '}':
32 parser->brace_count--;
33 break;
34 case '[':
35 parser->bracket_count++;
36 break;
37 case ']':
38 parser->bracket_count--;
39 break;
40 default:
41 break;
42 }
43 }
44
45 dict = qdict_new();
46 qdict_put(dict, "type", qint_from_int(type));
47 QINCREF(token);
48 qdict_put(dict, "token", token);
49 qdict_put(dict, "x", qint_from_int(x));
50 qdict_put(dict, "y", qint_from_int(y));
51
52 qlist_append(parser->tokens, dict);
53
54 if (parser->brace_count == 0 &&
55 parser->bracket_count == 0) {
56 parser->emit(parser, parser->tokens);
57 QDECREF(parser->tokens);
58 parser->tokens = qlist_new();
59 }
60 }
61
62 void json_message_parser_init(JSONMessageParser *parser,
63 void (*func)(JSONMessageParser *, QList *))
64 {
65 parser->emit = func;
66 parser->brace_count = 0;
67 parser->bracket_count = 0;
68 parser->tokens = qlist_new();
69
70 json_lexer_init(&parser->lexer, json_message_process_token);
71 }
72
73 int json_message_parser_feed(JSONMessageParser *parser,
74 const char *buffer, size_t size)
75 {
76 return json_lexer_feed(&parser->lexer, buffer, size);
77 }
78
79 int json_message_parser_flush(JSONMessageParser *parser)
80 {
81 return json_lexer_flush(&parser->lexer);
82 }
83
84 void json_message_parser_destroy(JSONMessageParser *parser)
85 {
86 json_lexer_destroy(&parser->lexer);
87 QDECREF(parser->tokens);
88 }
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