forked from shafreeck/pb2json
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathpb2json.cpp
205 lines (197 loc) · 6.37 KB
/
pb2json.cpp
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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
#include "pb2json.h"
//using std::string;
std::string hex_encode(const std::string& input)
{
static const char* const lut = "0123456789abcdef";
size_t len = input.length();
std::string output;
output.reserve(2 * len);
for (size_t i = 0; i < len; ++i)
{
const unsigned char c = input[i];
output.push_back(lut[c >> 4]);
output.push_back(lut[c & 15]);
}
return output;
}
char * pb2json(const google::protobuf::Message &msg)
{
json_t *root = parse_msg(&msg);
char *json = json_dumps(root,0);
json_decref(root);
return json; // should be freed by caller
}
char * pb2json( google::protobuf::Message *msg,const char *buf ,int len)
{
GOOGLE_PROTOBUF_VERIFY_VERSION;
std::string s (buf,len);
msg->ParseFromString(s);
json_t *root = parse_msg(msg);
char *json = json_dumps(root,0);
json_decref(root);
google::protobuf::ShutdownProtobufLibrary();
return json; // should be freed by caller
}
static json_t *parse_repeated_field(const google::protobuf::Message *msg,const google::protobuf::Reflection * ref,const google::protobuf::FieldDescriptor *field)
{
size_t count = ref->FieldSize(*msg,field);
json_t *arr = json_array();
if(!arr)return NULL;
switch(field->cpp_type())
{
case google::protobuf::FieldDescriptor::CPPTYPE_DOUBLE:
for(size_t i = 0 ; i != count ; ++i)
{
double value1 = ref->GetRepeatedDouble(*msg,field,i);
json_array_append_new(arr,json_real(value1));
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_FLOAT:
for(size_t i = 0 ; i != count ; ++i)
{
float value2 = ref->GetRepeatedFloat(*msg,field,i);
json_array_append_new(arr,json_real(value2));
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_INT64:
for(size_t i = 0 ; i != count ; ++i)
{
int64_t value3 = ref->GetRepeatedInt64(*msg,field,i);
json_array_append_new(arr,json_integer(value3)) ;
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_UINT64:
for(size_t i = 0 ; i != count ; ++i)
{
uint64_t value4 = ref->GetRepeatedUInt64(*msg,field,i);
json_array_append_new(arr,json_integer(value4));
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_INT32:
for(size_t i = 0 ; i != count ; ++i)
{
int32_t value5 = ref->GetRepeatedInt32(*msg,field,i);
json_array_append_new(arr,json_integer(value5));
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_UINT32:
for(size_t i = 0 ; i != count ; ++i)
{
uint32_t value6 = ref->GetRepeatedUInt32(*msg,field,i);
json_array_append_new(arr,json_integer(value6));
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_BOOL:
for(size_t i = 0 ; i != count ; ++i)
{
bool value7 = ref->GetRepeatedBool(*msg,field,i);
json_array_append_new(arr,value7?json_true():json_false()) ;
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_STRING:
for(size_t i = 0 ; i != count ; ++i)
{
std::string value8 = ref->GetRepeatedString(*msg,field,i);
json_array_append_new(arr,json_string(value8.c_str()));
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_MESSAGE:
for(size_t i = 0 ; i != count ; ++i)
{
const google::protobuf::Message *value9 = &(ref->GetRepeatedMessage(*msg,field,i));
json_array_append_new(arr,parse_msg(value9));
}
break;
case google::protobuf::FieldDescriptor::CPPTYPE_ENUM:
for(size_t i = 0 ; i != count ; ++i)
{
const google::protobuf::EnumValueDescriptor* value10 = ref->GetRepeatedEnum(*msg,field,i);
json_array_append_new(arr,json_integer(value10->number()));
}
break;
default:
break;
}
return arr;
}
static json_t *parse_msg(const google::protobuf::Message *msg)
{
const google::protobuf::Descriptor *d = msg->GetDescriptor();
if(!d)return NULL;
size_t count = d->field_count();
json_t *root = json_object();
if(!root)return NULL;
for (size_t i = 0; i != count ; ++i)
{
const google::protobuf::FieldDescriptor *field = d->field(i);
if(!field)return NULL;
const google::protobuf::Reflection *ref = msg->GetReflection();
if(!ref)return NULL;
const char *name = field->name().c_str();
if(field->is_repeated())
json_object_set_new(root,name,parse_repeated_field(msg,ref,field));
if(!field->is_repeated() && ref->HasField(*msg,field))
{
double value1;
float value2;
int64_t value3;
uint64_t value4;
int32_t value5;
uint32_t value6;
bool value7;
std::string value8;
const google::protobuf::Message *value9;
const google::protobuf::EnumValueDescriptor *value10;
switch (field->cpp_type())
{
case google::protobuf::FieldDescriptor::CPPTYPE_DOUBLE:
value1 = ref->GetDouble(*msg,field);
json_object_set_new(root,name,json_real(value1));
break;
case google::protobuf::FieldDescriptor::CPPTYPE_FLOAT:
value2 = ref->GetFloat(*msg,field);
json_object_set_new(root,name,json_real(value2));
break;
case google::protobuf::FieldDescriptor::CPPTYPE_INT64:
value3 = ref->GetInt64(*msg,field);
json_object_set_new(root,name,json_integer(value3)) ;
break;
case google::protobuf::FieldDescriptor::CPPTYPE_UINT64:
value4 = ref->GetUInt64(*msg,field);
json_object_set_new(root,name,json_integer(value4));
break;
case google::protobuf::FieldDescriptor::CPPTYPE_INT32:
value5 = ref->GetInt32(*msg,field);
json_object_set_new(root,name,json_integer(value5));
break;
case google::protobuf::FieldDescriptor::CPPTYPE_UINT32:
value6 = ref->GetUInt32(*msg,field);
json_object_set_new(root,name,json_integer(value6));
break;
case google::protobuf::FieldDescriptor::CPPTYPE_BOOL:
value7 = ref->GetBool(*msg,field);
json_object_set_new(root,name,value7?json_true():json_false()) ;
break;
case google::protobuf::FieldDescriptor::CPPTYPE_STRING:
if (field->type() == google::protobuf::FieldDescriptor::TYPE_BYTES) {
value8 = hex_encode(ref->GetString(*msg,field));
} else {
value8 = ref->GetString(*msg,field);
}
json_object_set_new(root,name,json_string(value8.c_str()));
break;
case google::protobuf::FieldDescriptor::CPPTYPE_MESSAGE:
value9 = &(ref->GetMessage(*msg,field));
json_object_set_new(root,name,parse_msg(value9));
break;
case google::protobuf::FieldDescriptor::CPPTYPE_ENUM:
value10 = ref->GetEnum(*msg,field);
json_object_set_new(root,name,json_integer(value10->number()));
break;
default:
break;
}
}
}
return root;
}