forked from json-c/json-c
-
Notifications
You must be signed in to change notification settings - Fork 0
/
json_visit.c
133 lines (124 loc) · 3.9 KB
/
json_visit.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
/*
* Copyright (c) 2016 Eric Haszlakiewicz
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See COPYING for details.
*/
#include <stdio.h>
#include "config.h"
#include "json_inttypes.h"
#include "json_object.h"
#include "json_visit.h"
#include "linkhash.h"
static int _json_c_visit(json_object *jso, json_object *parent_jso,
const char *jso_key, size_t *jso_index,
json_c_visit_userfunc userfunc, void *userarg);
int json_c_visit(json_object *jso, int future_flags,
json_c_visit_userfunc userfunc, void *userarg)
{
int ret = _json_c_visit(jso, NULL, NULL, NULL, userfunc, userarg);
switch(ret)
{
case JSON_C_VISIT_RETURN_CONTINUE:
case JSON_C_VISIT_RETURN_SKIP:
case JSON_C_VISIT_RETURN_POP:
case JSON_C_VISIT_RETURN_STOP:
return 0;
default:
return JSON_C_VISIT_RETURN_ERROR;
}
}
static int _json_c_visit(json_object *jso, json_object *parent_jso,
const char *jso_key, size_t *jso_index,
json_c_visit_userfunc userfunc, void *userarg)
{
int userret = userfunc(jso, 0, parent_jso, jso_key, jso_index, userarg);
switch(userret)
{
case JSON_C_VISIT_RETURN_CONTINUE:
break;
case JSON_C_VISIT_RETURN_SKIP:
case JSON_C_VISIT_RETURN_POP:
case JSON_C_VISIT_RETURN_STOP:
case JSON_C_VISIT_RETURN_ERROR:
return userret;
default:
fprintf(stderr, "ERROR: invalid return value from json_c_visit userfunc: %d\n", userret);
return JSON_C_VISIT_RETURN_ERROR;
}
switch(json_object_get_type(jso))
{
case json_type_null:
case json_type_boolean:
case json_type_double:
case json_type_int:
case json_type_string:
// we already called userfunc above, move on to the next object
return JSON_C_VISIT_RETURN_CONTINUE;
case json_type_object:
{
json_object_object_foreach(jso, key, child)
{
userret = _json_c_visit(child, jso, key, NULL, userfunc, userarg);
if (userret == JSON_C_VISIT_RETURN_POP)
break;
if (userret == JSON_C_VISIT_RETURN_STOP ||
userret == JSON_C_VISIT_RETURN_ERROR)
return userret;
if (userret != JSON_C_VISIT_RETURN_CONTINUE &&
userret != JSON_C_VISIT_RETURN_SKIP)
{
fprintf(stderr, "INTERNAL ERROR: _json_c_visit returned %d\n", userret);
return JSON_C_VISIT_RETURN_ERROR;
}
}
break;
}
case json_type_array:
{
size_t array_len = json_object_array_length(jso);
size_t ii;
for (ii = 0; ii < array_len; ii++)
{
json_object *child = json_object_array_get_idx(jso, ii);
userret = _json_c_visit(child, jso, NULL, &ii, userfunc, userarg);
if (userret == JSON_C_VISIT_RETURN_POP)
break;
if (userret == JSON_C_VISIT_RETURN_STOP ||
userret == JSON_C_VISIT_RETURN_ERROR)
return userret;
if (userret != JSON_C_VISIT_RETURN_CONTINUE &&
userret != JSON_C_VISIT_RETURN_SKIP)
{
fprintf(stderr, "INTERNAL ERROR: _json_c_visit returned %d\n", userret);
return JSON_C_VISIT_RETURN_ERROR;
}
}
break;
}
default:
fprintf(stderr, "INTERNAL ERROR: _json_c_visit found object of unknown type: %d\n", json_object_get_type(jso));
return JSON_C_VISIT_RETURN_ERROR;
}
// Call userfunc for the second type on container types, after all
// members of the container have been visited.
// Non-container types will have already returned before this point.
userret = userfunc(jso, JSON_C_VISIT_SECOND, parent_jso, jso_key, jso_index, userarg);
switch(userret)
{
case JSON_C_VISIT_RETURN_SKIP:
case JSON_C_VISIT_RETURN_POP:
// These are not really sensible during JSON_C_VISIT_SECOND,
// but map them to JSON_C_VISIT_CONTINUE anyway.
// FALLTHROUGH
case JSON_C_VISIT_RETURN_CONTINUE:
return JSON_C_VISIT_RETURN_CONTINUE;
case JSON_C_VISIT_RETURN_STOP:
case JSON_C_VISIT_RETURN_ERROR:
return userret;
default:
fprintf(stderr, "ERROR: invalid return value from json_c_visit userfunc: %d\n", userret);
return JSON_C_VISIT_RETURN_ERROR;
}
// NOTREACHED
}