tiny-json is a versatile and easy to use json parser in C suitable for embedded systems. It is fast, robust and portable.
tiny-json is a versatile and easy to use json parser written in C and suitable for embedded systems. It is fast, robust and portable.
It is not only a tokenizer. You can get data in string format or get the primitives values in C type variables without performance loss.
It is not only a tokenizer. You can access json data in string format or get primitive values directly as C type variables without any loss of performance.
You can get the JSON fields one on one. Or get their values by their names. This helps you to save a lot of source code lines and development time.
You can access the JSON fields one on one or get their values by their names. This helps you to save a lot of source code lines and development time.
* It does not use recursivity.
* It does not use dynamic memory. The memory you use can be reserved statically.
* It has not limits in nested level in arrays or json objects.
* There is no limit for nested levels in arrays or json objects.
* The JSON property number limit is determined by the size of a buffer that can be statically reserved.
If you need create JSON strings please visit: https://github.com/rafagafe/json-maker
If you need to create JSON strings please visit: https://github.com/rafagafe/json-maker
# Philosophy
When parsing a JSON text string a tree is created by linking json_t structures. Navigating or querying this tree is very easy using the API functions.
When parsing a JSON text string a tree is created by linking json_t structures. Navigating or querying this tree is very easy using the provided API.
To maintain reduced memory usage and fast processing the strings are not copied. When you request the value of a JSON element, a reference is returned within the original string with the JSON.
To maintain reduced memory usage and fast processing the strings are not copied. When you request the value of a JSON element, a reference to the original JSON string is returned.
To facilitate the processing of the data the returned strings are null-terminated strings. This is achieved by setting the null character to JSON control characters such as commas, brackets, braces, and quotation marks.
To facilitate the processing of the data the returned strings are null-terminated. This is achieved by setting the null character to JSON control characters such as commas, brackets, braces, and quotation marks.
# API
Two types are defined in tiny-json API. One is jsonType_t. It is an enumeration with the types of JSON fields. And the other is json_t. It is a structure that you don't need know its content.
The tiny-json API provides two types. `jsonType_t` is an enumeration for all possible JSON field types. `json_t` is a structure containing internal data which you don't need to know.
```C
typedef enum {
JSON_OBJ, JSON_ARRAY, JSON_TEXT, JSON_BOOLEAN,
JSON_INTEGER, JSON_REAL, JSON_NULL
} jsonType_t;
```
To parse a JSON string we use the function json_create(). We pass it an array of json_t for it can allocate JSON fields.
If the JSON string is bad format or has more fields than the array it returns a null pointer.
To parse a JSON string use `json_create()`. We pass it an array of `json_t` for it to allocate JSON fields.
If the JSON string is bad formated or has more fields than the array this function returns a null pointer.
In primitive type fileds we can use a especific funtion to get its value in a C type like json_getInteger() or still use json_getValue() to get its value in text format.
For primitive fields we can use a specific function to get the fields value directly as a C type, f.i. `json_getInteger()` or we can use `json_getValue()` to get its value in text format.
Rafa García
3 years ago
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GitHub