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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
#pragma once
#include <charconv>
namespace saw {
namespace impl {
template<typename Schema, typename RootSchema, typename FromEncode>
class json_encode {
static_assert(always_false<Schema, RootSchema, FromEncode>, "This schema type is not being handle by the json encoding.");
};
template<typename T, size_t N, typename RootSchema, typename FromEncode>
struct json_encode<schema::Primitive<T,N>, RootSchema, FromEncode> {
static error_or<void> encode(const data<schema::Primitive<T,N>, FromEncode>& from, buffer& to) {
auto val = from.get();
std::array<uint8_t, 256> data;
auto tc_result = std::to_chars(reinterpret_cast<char*>(data.data()), reinterpret_cast<char*>(data.data())+data.size(), val);
if(tc_result.ec != std::errc{}){
return make_error<err::critical>();
}
size_t bytes_written = 0;
for(char* ptr = reinterpret_cast<char*>(data.data()); ptr != tc_result.ptr; ++ptr){
++bytes_written;
}
auto& buff = to;
error err = buff.write_require_length(bytes_written);
if(!err.template is_type<err::no_error>()){
return std::move(err);
}
for(char* ptr = reinterpret_cast<char*>(data.data()); ptr != tc_result.ptr; ++ptr){
uint8_t* un_ptr = reinterpret_cast<uint8_t*>(ptr);
buff.push(un_ptr[0]);
}
return void_t{};
}
};
template<typename RootSchema, typename FromEncode>
struct json_encode<schema::String, RootSchema, FromEncode> {
static error_or<void> encode(const data<schema::String, FromEncode>& from, buffer& to) {
{
auto err = to.push('"');
if(!err.template is_type<err::no_error>()){
return err;
}
}
for(std::size_t i = 0; i < from.size(); ++i){
auto err = to.push(from.get_at(i));
if(!err.template is_type<err::no_error>()){
return err;
}
}
{
auto err = to.push('"');
if(!err.template is_type<err::no_error>()){
return err;
}
}
return void_t{};
}
};
template<typename... T, typename RootSchema, typename FromEncode>
struct json_encode<schema::Tuple<T...>, RootSchema, FromEncode> {
template<size_t i>
static error_or<void> encode_element(const data<schema::Tuple<T...>, FromEncode>& from, buffer& to){
auto eov = json_encode<typename parameter_pack_type<i, T...>::type, RootSchema, FromEncode>::encode(from.template get<i>(), to);
if(eov.is_error()){
return eov;
}
if constexpr ( (i+1) < sizeof...(T)){
{
auto eov_ele = to.push(',');
if(!eov_ele.template is_type<err::no_error>()){
return eov_ele;
}
}
{
auto eov_ele = encode_element<i+1>(from, to);
if(eov_ele.is_error()){
return eov_ele;
}
}
}
return void_t{};
}
static error_or<void> encode(const data<schema::Tuple<T...>, FromEncode>& from, buffer& to) {
{
auto err = to.push('[');
if(!err.template is_type<err::no_error>()){
return err;
}
}
if constexpr ( sizeof...(T) > 0 ){
auto eov = encode_element<0>(from, to);
if(eov.is_error()){
return eov;
}
}
{
auto err = to.push(']');
if(!err.template is_type<err::no_error>()){
return err;
}
}
return void_t{};
}
};
template<typename T, typename RootSchema, typename FromEncode>
struct json_encode<schema::Array<T>, RootSchema, FromEncode> {
static error_or<void> encode(const data<schema::Array<T>, FromEncode>& from, buffer& to) {
{
auto err = to.push('[');
if(!err.template is_type<err::no_error>()){
return err;
}
}
for(std::size_t i = 0; i < from.size(); ++i){
if(i > 0){
auto eov_ele = to.push(',');
if(!eov_ele.template is_type<err::no_error>()){
return eov_ele;
}
}
auto eov = json_encode<T, RootSchema, FromEncode>::encode(from.at(i), to);
if(eov.is_error()){
return eov;
}
}
{
auto err = to.push(']');
if(!err.template is_type<err::no_error>()){
return err;
}
}
return void_t{};
}
};
template<typename... T, string_literal... Key, typename RootSchema, typename FromEncode>
struct json_encode<schema::Struct<schema::Member<T,Key>...>, RootSchema, FromEncode> {
template<size_t i>
static error_or<void> encode_element(const data<schema::Struct<schema::Member<T,Key>...>, FromEncode>& from, buffer& to){
// Encode the name
{
std::string_view view = parameter_key_pack_type<i, Key...>::literal.view();
error err = to.push('"');
if(!err.template is_type<err::no_error>()){
return err;
}
err = to.push(*reinterpret_cast<const uint8_t *>(view.data()), view.size());
if(!err.template is_type<err::no_error>()){
return err;
}
err = to.push('"');
if(!err.template is_type<err::no_error>()){
return err;
}
}
// Add the separator
{
auto eov_ele = to.push(':');
if(!eov_ele.template is_type<err::no_error>()){
return eov_ele;
}
}
// Encode the value
auto eov = json_encode<typename parameter_pack_type<i, T...>::type, RootSchema, FromEncode>::encode(from.template get<parameter_key_pack_type<i, Key...>::literal>(), to);
// Go to the next element
if constexpr ( (i+1) < sizeof...(T)){
{
auto eov_ele = to.push(',');
if(!eov_ele.template is_type<err::no_error>()){
return eov_ele;
}
}
{
auto eov_ele = encode_element<i+1>(from, to);
if(eov_ele.is_error()){
return eov_ele;
}
}
}
return void_t{};
}
static error_or<void> encode(const data<schema::Struct<schema::Member<T,Key>...>, FromEncode>& from, buffer& to) {
{
auto err = to.push('{');
if(!err.template is_type<err::no_error>()){
return err;
}
}
if constexpr ( sizeof...(T) > 0 ){
auto eov = encode_element<0>(from, to);
if(eov.is_error()){
return eov;
}
}
{
auto err = to.push('}');
if(!err.template is_type<err::no_error>()){
return err;
}
}
return void_t{};
}
};
}
}
|
