JSON Parser

Functions
char *	json_find_key (char *key, char *json)
	Parses a JSON string for the string pointed to by key. More...
char *	json_find_list_item (uint16_t number, char *json)
	for finding the nth list item in the json key More...
void	json_get_string (char *json, char *mystring)
	This function gets the string associated with a list item from a JSON string. More...
unsigned int	json_get_int (char *json)
	This function gets the integer associated with a list item from a JSON string. More...

Detailed Description

@ brief Helper functions to parse a JSON string in C.

Created on: Apr 14, 2018 Author: Delengowski & Szymczak

Function Documentation

char* json_find_key	(	char *	key,
		char *	json
	)

Parses a JSON string for the string pointed to by key.

Author

Matt Delengowksi

Date

Apr 14, 2018

Parameters

key	A pointer to a string that is a key within a JSON string
json	A pointer to the JSON string for which to parse for keys

Returns

Returns the location of the first '[' after the key has been found in json

char* json_find_list_item	(	uint16_t	number,
		char *	json
	)

for finding the nth list item in the json key

Parameters

number	The nth list item in the json key
json	The json key being passed in

Returns

returns a char pointer, pointing to the nth list item in the json key

unsigned int json_get_int

(

char *

json

)

This function gets the integer associated with a list item from a JSON string.

Author

Stephen Szymczak

Date

Apr 14, 2018 This function goes through a json string until a ' : ' is found, then checks for and skips spaces. It is assumed the next value after either ':' or ' ' will be a number. The function gets the number. Only unsigned ints are valid (0-65535).

Parameters

json	A pointer to the JSON string for which to parse for numbers.

Returns

Returns the integer associated with JSON string in question.

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void json_get_string	(	char *	json,
		char *	mystring
	)

This function gets the string associated with a list item from a JSON string.

Author

Stephen Szymczak

Date

Apr 14, 2018 This function goes through a json string until a ' : ' is found, then gets the string following the list item, parsing out the ' " ' at beginning and end. Fills a character array with the desired string.

Parameters

json	A pointer to the JSON string for which to parse for the string.
mystring	A pointer to a user defined string which is populated with the string extraced from json