add zh readme
This commit is contained in:
parent
547de2d48c
commit
73cb09dbf8
|
@ -197,7 +197,6 @@ char* jstrOutput;
|
|||
csonStruct2JsonStr(&jstrOutput, &playList, play_list_ref_tbl);
|
||||
```
|
||||
|
||||
## restrict
|
||||
## Restrict
|
||||
- Multidimensional arrays are not supported.
|
||||
- Use size_t to save array size in structure, other types(int, short, char) are not supported now.
|
||||
- Cjson is used by default. If you want to use jannson or other json lib, please modify $(JSON_LIB) in makefile.
|
||||
|
|
|
@ -0,0 +1,200 @@
|
|||
# cson
|
||||
轻松完成C语言结构体和Json的转换。
|
||||
|
||||
其中Json字符串与Json对象(例如Jansson库中的json_t)之间的转换由第三方库实现(例如Jansson或者cJSON,请参考依赖库)。
|
||||
cson真正实现的是Json对象与结构体间的转换。
|
||||
|
||||
## 编译
|
||||
### 编译静态库
|
||||
``` shell
|
||||
$ git clone https://github.com/sunchb/cson.git
|
||||
$ cd cson
|
||||
$ make
|
||||
```
|
||||
### 编译示例
|
||||
``` shell
|
||||
$ cd demo
|
||||
$ make
|
||||
$ ./test
|
||||
```
|
||||
## 如何使用cson
|
||||
1. 定义与Json协议对应的结构体。
|
||||
2. 定义结构体的属性描述表。
|
||||
3. 调用cson接口完成转换。
|
||||
|
||||
## 依赖
|
||||
https://github.com/akheron/jansson.git
|
||||
https://github.com/DaveGamble/cJSON.git
|
||||
|
||||
## 示例
|
||||
下面具有各种数据类型的JSON。例如整数,字符串,实数,布尔值,对象和数组。我们将通过cson对其进行解码和编码。
|
||||
|
||||
``` json
|
||||
{
|
||||
"name":"jay zhou",
|
||||
"creater":"dahuaxia",
|
||||
"songNum":2,
|
||||
"songList":[
|
||||
{
|
||||
"songName":"qilixiang",
|
||||
"signerName":"jay zhou",
|
||||
"albumName":"qilixiang",
|
||||
"url":"www.kugou.com",
|
||||
"duration":200,
|
||||
"paid":false,
|
||||
"price":6.6600000000000001,
|
||||
"lyricNum":2,
|
||||
"lyric":[
|
||||
{
|
||||
"time":1,
|
||||
"text":"Sparrow outside the window"
|
||||
},
|
||||
{
|
||||
"time":10,
|
||||
"text":"Multi mouth on the pole"
|
||||
}
|
||||
]
|
||||
},
|
||||
{
|
||||
"songName":"dongfengpo",
|
||||
"signerName":"jay zhou",
|
||||
"albumName":"dongfengpo",
|
||||
"url":"music.qq.com",
|
||||
"duration":180,
|
||||
"paid":true,
|
||||
"price":0.88,
|
||||
"lyricNum":2,
|
||||
"lyric":[
|
||||
{
|
||||
"time":10,
|
||||
"text":"A sad parting, standing alone in the window"
|
||||
},
|
||||
{
|
||||
"time":20,
|
||||
"text":"I'm behind the door pretending you're not gone"
|
||||
}
|
||||
]
|
||||
}
|
||||
],
|
||||
"extData":{
|
||||
"a":999,
|
||||
"b":1.05
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### 1. 定义与Json协议对应的结构体。
|
||||
即使不适用json,通常我们也会这么做。
|
||||
|
||||
#### 注意事项
|
||||
- 字符串必须定义为char*类型。
|
||||
- 数组必须定义为指针类型。
|
||||
- 如果结构体包含数组,需要为每一个数组定义一个额外的属性,用于保存数组大小。
|
||||
|
||||
``` c
|
||||
typedef struct {
|
||||
int time;
|
||||
char* text; /* String must be declared as char* */
|
||||
} Lyric;
|
||||
|
||||
typedef struct {
|
||||
char* songName;
|
||||
char* signerName;
|
||||
char* albumName;
|
||||
char* url;
|
||||
int duration;
|
||||
int paid;
|
||||
double price;
|
||||
size_t lyricNum; /* Declare additional properties to hold the array size */
|
||||
Lyric* lyric; /* Array must be declared as pointer */
|
||||
} SongInfo;
|
||||
|
||||
typedef struct {
|
||||
int a;
|
||||
double b;
|
||||
} ExtData;
|
||||
|
||||
typedef struct {
|
||||
char* name;
|
||||
char* creater;
|
||||
size_t songNum;
|
||||
SongInfo* songList;
|
||||
ExtData extData;
|
||||
} PlayList;
|
||||
```
|
||||
|
||||
### 2. 定义结构体的属性描述表。
|
||||
使用以下宏定义描述结构体属性。
|
||||
- _property_int(type, field)
|
||||
- _property_real(type, field)
|
||||
- _property_bool(type, field)
|
||||
- _property_string(type, field)
|
||||
- _property_obj(type, field, tbl)
|
||||
- _property_array_object(type, field, tbl, arrayType, countfild) # I know it's a little cumbersome, I'm trying to simplify it.
|
||||
- _property_array_int(type, field, arrayType, countfild)
|
||||
- _property_array_string(type, field, arrayType, countfild)
|
||||
- _property_array_real(type, field, arrayType, countfild)
|
||||
- _property_array_bool(type, field, arrayType, countfild)
|
||||
|
||||
参数说明:
|
||||
- type: type of data structure
|
||||
- field: property name
|
||||
- tbl: description table of the property type. use when object or object array
|
||||
- arrayType: type of the array (Used to calculate size when dynamically get array memory)
|
||||
- countfild: property to save array size
|
||||
|
||||
``` c
|
||||
/* description for Lyric */
|
||||
reflect_item_t lyric_ref_tbl[] = {
|
||||
_property_int(Lyric, time),
|
||||
_property_string(Lyric, text),
|
||||
_property_end()
|
||||
};
|
||||
|
||||
/* description for SongInfo */
|
||||
reflect_item_t song_ref_tbl[] = {
|
||||
_property_string(SongInfo, songName),
|
||||
_property_string(SongInfo, signerName),
|
||||
_property_string(SongInfo, albumName),
|
||||
_property_string(SongInfo, url),
|
||||
_property_int(SongInfo, duration),
|
||||
_property_bool(SongInfo, paid),
|
||||
_property_real(SongInfo, price),
|
||||
_property_int(SongInfo, lyricNum),
|
||||
_property_array(SongInfo, lyric, lyric_ref_tbl, Lyric, lyricNum), /* Lyric: type of array; lyricNum: property to save array size */
|
||||
_property_end()
|
||||
};
|
||||
|
||||
/* description for ExtData */
|
||||
reflect_item_t ext_data_ref_tbl[] = {
|
||||
_property_int(ExtData, a),
|
||||
_property_real(ExtData, b),
|
||||
_property_end()
|
||||
};
|
||||
|
||||
/* description for PlayList */
|
||||
reflect_item_t play_list_ref_tbl[] = {
|
||||
_property_string(PlayList, name),
|
||||
_property_string(PlayList, creater),
|
||||
_property_int(PlayList, songNum),
|
||||
_property_array(PlayList, songList, song_ref_tbl, SongInfo, songNum),
|
||||
_property_obj(PlayList, extData, ext_data_ref_tbl),
|
||||
_property_end()
|
||||
};
|
||||
```
|
||||
|
||||
### 3. 调用cson接口编解码Json。
|
||||
``` c
|
||||
PlayList playList;
|
||||
|
||||
/* Decode */
|
||||
csonJsonStr2Struct(jStr, &playList, play_list_ref_tbl);
|
||||
|
||||
/* Encode */
|
||||
char* jstrOutput;
|
||||
csonStruct2JsonStr(&jstrOutput, &playList, play_list_ref_tbl);
|
||||
```
|
||||
|
||||
## 限制
|
||||
- 暂不支持多维数组。
|
||||
- 默认使用Cjson库。如果需要使用jannson,请修改Makefile中的$(JSON_LIB)变量。
|
Loading…
Reference in New Issue