p-p-h-d / mjsonlib

Small JSON library based on M*LIB

mjsonlib

Small JSON library based on M*LIB.

This library allows parsing a JSON file, reading values from it and output it.

USAGE

mjson_t

The type represening a JSON structure.

void json_init (mjson_t *p);

Initialize the JSON structure pointed by p to an empty JSON.

bool json_init_in_str(mjson_t *p, FILE *f);

Initialize the JSON structure pointed by p to the contain of the file f which is supposed to be a JSON file.

bool json_init_set(mjson_t *p, mjson_t o);

Initialize the JSON structure pointed by p to the same value than 'o'.

bool json_set(mjson_t *p, mjson_t o);

Set the JSON structure pointed by p to the same value than 'o'.

void json_clear (mjson_t p);

Clear the JSON structure 'p'.

bool json_in_str(mjson_t *p, FILE *f);

Set the JSON structure pointed by p to the contain of the file f which is supposed to be a JSON file.

void json_out_str(FILE *f, mjson_t p);

Output the JSON structure 'p' into the FILE f.

double json_get_real(mjson_t p, ...);

Return the real value associated to the given address of the JSON structure 'p', or NAN if no real value is associated to this address.

The address is composed of a NULL terminated list of additional parameters of type 'const char *'. Each parameter is either the field associated to the structure or an index in a table (if it starts with '[').

Example: double d = json_get_real(p, "c", "[2]", "d", NULL); returns the value of p.c.[2].d

int json_get_boolean(mjson_t p, ...);

Return the boolean value associated to the given address of the JSON structure 'p' (false or true), or -1 if no boolean value is associated to this address.

const char *json_get_string(mjson_t p, ...);

Return a pointer to a constant string associated to the given address of the JSON structure 'p' (false or true), or -1 if no string value is associated to this address.

bool json_get_empty(mjson_t, ...);

Return true if the given address is associated to a null value, or false if the given address doesn't exist or is not associated to a null value.

Example

See test.c