json.cpp File Reference

Implementation of the zero-heap JSON writer and top-level reader. More...

#include "json.h"
#include "shared_primitives/numparse.h"
#include <stdio.h>
#include <string.h>

Go to the source code of this file.

Enumerations
enum class	JsonEsc { LITERAL_C , EMITTED , TRUNCATED }

Functions
bool	json_get_str (const char *json, const char *key, char *out, size_t out_cap)
	Read a top-level string member from a JSON object body.
bool	json_get_int (const char *json, const char *key, long *out)
	Read a top-level integer member from a JSON object body.
bool	json_get_bool (const char *json, const char *key, bool *out)
	Read a top-level boolean member (true/false) from a JSON object body.

Detailed Description

Implementation of the zero-heap JSON writer and top-level reader.

Definition in file json.cpp.

Enumeration Type Documentation

JsonEsc

enum class JsonEsc

strong

Enumerator
LITERAL_C
EMITTED
TRUNCATED

Definition at line 371 of file json.cpp.

Function Documentation

json_get_str()

bool json_get_str	(	const char *	json,
		const char *	key,
		char *	out,
		size_t	out_cap
	)

Read a top-level string member from a JSON object body.

Finds "key": "..." at the root object level (nested objects/arrays and string contents are skipped, so a same-named nested key is not matched), unescapes the value, and copies it (NUL-terminated, bounded by out_cap) into out.

Parameters

json	NUL-terminated JSON object text.
key	Member name to find.
out	Destination buffer.
out_cap	Capacity of out including the NUL.

Returns

true if a string member was found and copied; false otherwise.

Definition at line 512 of file json.cpp.

References EMITTED, and TRUNCATED.

json_get_int()

bool json_get_int	(	const char *	json,
		const char *	key,
		long *	out
	)

Read a top-level integer member from a JSON object body.

Returns

true if the member exists and parses as an integer; false otherwise.

Definition at line 552 of file json.cpp.

References det_strtol().

json_get_bool()

bool json_get_bool	(	const char *	json,
		const char *	key,
		bool *	out
	)

Read a top-level boolean member (true/false) from a JSON object body.

Returns

true if the member exists and is a JSON boolean; false otherwise.

Definition at line 567 of file json.cpp.