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Data Structures
struct	_lejp_stack

struct	_lejp_parsing_stack

struct	lejp_ctx

Macros
#define	LWS_ARRAY_SIZE(_x) (sizeof(_x) / sizeof(_x[0]))

#define	LEJP_FLAG_WS_KEEP 64

#define	LEJP_FLAG_WS_COMMENTLINE 32

#define	LEJP_FLAG_CB_IS_VALUE 64

#define	LEJP_MAX_PARSING_STACK_DEPTH 8

#define	LEJP_MAX_DEPTH 16

#define	LEJP_MAX_INDEX_DEPTH 12

#define	LEJP_MAX_PATH 192

#define	LEJP_STRING_CHUNK 254

#define	LEJP_FLAG_FEAT_OBJECT_INDEXES (1 << 0)

#define	LEJP_FLAG_FEAT_LEADING_WC (1 << 1)

#define	LEJP_FLAG_LATEST

Typedefs
typedef signed char(*	lejp_callback) (struct lejp_ctx *ctx, char reason)

Enumerations
enum	lejp_states { LEJP_IDLE = 0 , LEJP_MEMBERS = 1 , LEJP_M_P = 2 , LEJP_MP_STRING = LEJP_FLAG_WS_KEEP \| 3 , LEJP_MP_STRING_ESC = LEJP_FLAG_WS_KEEP \| 4 , LEJP_MP_STRING_ESC_U1 = LEJP_FLAG_WS_KEEP \| 5 , LEJP_MP_STRING_ESC_U2 = LEJP_FLAG_WS_KEEP \| 6 , LEJP_MP_STRING_ESC_U3 = LEJP_FLAG_WS_KEEP \| 7 , LEJP_MP_STRING_ESC_U4 = LEJP_FLAG_WS_KEEP \| 8 , LEJP_MP_DELIM = 9 , LEJP_MP_VALUE = 10 , LEJP_MP_VALUE_NUM_INT = LEJP_FLAG_WS_KEEP \| 11 , LEJP_MP_VALUE_NUM_EXP = LEJP_FLAG_WS_KEEP \| 12 , LEJP_MP_VALUE_TOK = LEJP_FLAG_WS_KEEP \| 13 , LEJP_MP_COMMA_OR_END = 14 , LEJP_MP_ARRAY_END = 15 }

enum	lejp_reasons { LEJP_CONTINUE = -1 , LEJP_REJECT_IDLE_NO_BRACE = -2 , LEJP_REJECT_MEMBERS_NO_CLOSE = -3 , LEJP_REJECT_MP_NO_OPEN_QUOTE = -4 , LEJP_REJECT_MP_STRING_UNDERRUN = -5 , LEJP_REJECT_MP_ILLEGAL_CTRL = -6 , LEJP_REJECT_MP_STRING_ESC_ILLEGAL_ESC = -7 , LEJP_REJECT_ILLEGAL_HEX = -8 , LEJP_REJECT_MP_DELIM_MISSING_COLON = -9 , LEJP_REJECT_MP_DELIM_BAD_VALUE_START = -10 , LEJP_REJECT_MP_VAL_NUM_INT_NO_FRAC = -11 , LEJP_REJECT_MP_VAL_NUM_FORMAT = -12 , LEJP_REJECT_MP_VAL_NUM_EXP_BAD_EXP = -13 , LEJP_REJECT_MP_VAL_TOK_UNKNOWN = -14 , LEJP_REJECT_MP_C_OR_E_UNDERF = -15 , LEJP_REJECT_MP_C_OR_E_NOTARRAY = -16 , LEJP_REJECT_MP_ARRAY_END_MISSING = -17 , LEJP_REJECT_STACK_OVERFLOW = -18 , LEJP_REJECT_MP_DELIM_ISTACK = -19 , LEJP_REJECT_NUM_TOO_LONG = -20 , LEJP_REJECT_MP_C_OR_E_NEITHER = -21 , LEJP_REJECT_UNKNOWN = -22 , LEJP_REJECT_CALLBACK = -23 }

enum	lejp_callbacks { LEJPCB_CONSTRUCTED = 0 , LEJPCB_DESTRUCTED = 1 , LEJPCB_START = 2 , LEJPCB_COMPLETE = 3 , LEJPCB_FAILED = 4 , LEJPCB_PAIR_NAME = 5 , LEJPCB_VAL_TRUE = LEJP_FLAG_CB_IS_VALUE \| 6 , LEJPCB_VAL_FALSE = LEJP_FLAG_CB_IS_VALUE \| 7 , LEJPCB_VAL_NULL = LEJP_FLAG_CB_IS_VALUE \| 8 , LEJPCB_VAL_NUM_INT = LEJP_FLAG_CB_IS_VALUE \| 9 , LEJPCB_VAL_NUM_FLOAT = LEJP_FLAG_CB_IS_VALUE \| 10 , LEJPCB_VAL_STR_START = 11 , LEJPCB_VAL_STR_CHUNK = LEJP_FLAG_CB_IS_VALUE \| 12 , LEJPCB_VAL_STR_END = LEJP_FLAG_CB_IS_VALUE \| 13 , LEJPCB_ARRAY_START = 14 , LEJPCB_ARRAY_END = 15 , LEJPCB_OBJECT_START = 16 , LEJPCB_OBJECT_END = 17 , LEJPCB_USER_START = 32 }

enum	num_flags { LEJP_SEEN_MINUS = (1 << 0) , LEJP_SEEN_POINT = (1 << 1) , LEJP_SEEN_POST_POINT = (1 << 2) , LEJP_SEEN_EXP = (1 << 3) }

Functions
LWS_EXTERN signed char	_lejp_callback (struct lejp_ctx *ctx, char reason)

LWS_VISIBLE LWS_EXTERN void	lejp_construct (struct lejp_ctx ctx, signed char(callback)(struct lejp_ctx ctx, char reason), void user, const char const paths, unsigned char paths_count)

LWS_VISIBLE LWS_EXTERN void	lejp_destruct (struct lejp_ctx *ctx)

LWS_VISIBLE LWS_EXTERN int	lejp_parse (struct lejp_ctx ctx, const unsigned char json, int len)

LWS_VISIBLE LWS_EXTERN void	lejp_change_callback (struct lejp_ctx ctx, signed char(callback)(struct lejp_ctx *ctx, char reason))

LWS_VISIBLE LWS_EXTERN int	lejp_parser_push (struct lejp_ctx ctx, void user, const char const paths, unsigned char paths_count, lejp_callback lejp_cb)

LWS_VISIBLE LWS_EXTERN int	lejp_parser_pop (struct lejp_ctx *ctx)

LWS_VISIBLE LWS_EXTERN void	lejp_check_path_match (struct lejp_ctx *ctx)

LWS_VISIBLE LWS_EXTERN int	lejp_get_wildcard (struct lejp_ctx ctx, int wildcard, char dest, int len)

LWS_VISIBLE LWS_EXTERN const char *	lejp_error_to_string (int e)

Data Structure Documentation

◆ _lejp_stack

struct _lejp_stack

Definition at line 204 of file lws-lejp.h.

Collaboration diagram for _lejp_stack:

Data Fields
char	s
char	p
char	i
char	b

◆ lejp_ctx

struct lejp_ctx

Definition at line 220 of file lws-lejp.h.

Collaboration diagram for lejp_ctx:

Data Fields
void *	user
struct _lejp_parsing_stack	pst[LEJP_MAX_PARSING_STACK_DEPTH]
struct _lejp_stack	st[LEJP_MAX_DEPTH]
uint16_t	i[LEJP_MAX_INDEX_DEPTH]
uint16_t	wild[LEJP_MAX_INDEX_DEPTH]
char	path[LEJP_MAX_PATH]
char	buf[LEJP_STRING_CHUNK+1]
size_t	path_stride
uint32_t	line
uint16_t	uni
uint16_t	flags
uint8_t	npos
uint8_t	dcount
uint8_t	f
uint8_t	sp
uint8_t	ipos
uint8_t	count_paths
uint8_t	path_match
uint8_t	path_match_len
uint8_t	wildcount
uint8_t	pst_sp
uint8_t	outer_array

Macro Definition Documentation

◆ LWS_ARRAY_SIZE

#define LWS_ARRAY_SIZE ( _x ) (sizeof(_x) / sizeof(_x[0]))

Definition at line 35 of file lws-lejp.h.

◆ LEJP_FLAG_WS_KEEP

#define LEJP_FLAG_WS_KEEP 64

Definition at line 37 of file lws-lejp.h.

◆ LEJP_FLAG_WS_COMMENTLINE

#define LEJP_FLAG_WS_COMMENTLINE 32

Definition at line 38 of file lws-lejp.h.

◆ LEJP_FLAG_CB_IS_VALUE

#define LEJP_FLAG_CB_IS_VALUE 64

Definition at line 85 of file lws-lejp.h.

◆ LEJP_MAX_PARSING_STACK_DEPTH

#define LEJP_MAX_PARSING_STACK_DEPTH 8

Definition at line 181 of file lws-lejp.h.

◆ LEJP_MAX_DEPTH

#define LEJP_MAX_DEPTH 16

Definition at line 184 of file lws-lejp.h.

◆ LEJP_MAX_INDEX_DEPTH

#define LEJP_MAX_INDEX_DEPTH 12

Definition at line 187 of file lws-lejp.h.

◆ LEJP_MAX_PATH

#define LEJP_MAX_PATH 192

Definition at line 190 of file lws-lejp.h.

◆ LEJP_STRING_CHUNK

#define LEJP_STRING_CHUNK 254

Definition at line 194 of file lws-lejp.h.

◆ LEJP_FLAG_FEAT_OBJECT_INDEXES

#define LEJP_FLAG_FEAT_OBJECT_INDEXES (1 << 0)

Definition at line 248 of file lws-lejp.h.

◆ LEJP_FLAG_FEAT_LEADING_WC

#define LEJP_FLAG_FEAT_LEADING_WC (1 << 1)

Definition at line 249 of file lws-lejp.h.

◆ LEJP_FLAG_LATEST

#define LEJP_FLAG_LATEST

Value:

(LEJP_FLAG_FEAT_OBJECT_INDEXES | \

LEJP_FLAG_FEAT_LEADING_WC)

LEJP_FLAG_FEAT_OBJECT_INDEXES

#define LEJP_FLAG_FEAT_OBJECT_INDEXES

Definition: lws-lejp.h:248

LEJP_FLAG_FEAT_LEADING_WC

#define LEJP_FLAG_FEAT_LEADING_WC

Definition: lws-lejp.h:249

Definition at line 250 of file lws-lejp.h.

Typedef Documentation

◆ lejp_callback

typedef signed char(* lejp_callback) (struct lejp_ctx *ctx, char reason)

Definition at line 178 of file lws-lejp.h.

Enumeration Type Documentation

◆ lejp_states

enum lejp_states

Enumerator
LEJP_IDLE
LEJP_MEMBERS
LEJP_M_P
LEJP_MP_STRING
LEJP_MP_STRING_ESC
LEJP_MP_STRING_ESC_U1
LEJP_MP_STRING_ESC_U2
LEJP_MP_STRING_ESC_U3
LEJP_MP_STRING_ESC_U4
LEJP_MP_DELIM
LEJP_MP_VALUE
LEJP_MP_VALUE_NUM_INT
LEJP_MP_VALUE_NUM_EXP
LEJP_MP_VALUE_TOK
LEJP_MP_COMMA_OR_END
LEJP_MP_ARRAY_END

Definition at line 40 of file lws-lejp.h.

                 {
        LEJP_IDLE = 0,
        LEJP_MEMBERS = 1,
        LEJP_M_P = 2,
        LEJP_MP_STRING = LEJP_FLAG_WS_KEEP | 3,
        LEJP_MP_STRING_ESC = LEJP_FLAG_WS_KEEP | 4,
        LEJP_MP_STRING_ESC_U1 = LEJP_FLAG_WS_KEEP | 5,
        LEJP_MP_STRING_ESC_U2 = LEJP_FLAG_WS_KEEP | 6,
        LEJP_MP_STRING_ESC_U3 = LEJP_FLAG_WS_KEEP | 7,
        LEJP_MP_STRING_ESC_U4 = LEJP_FLAG_WS_KEEP | 8,
        LEJP_MP_DELIM = 9,
        LEJP_MP_VALUE = 10,
        LEJP_MP_VALUE_NUM_INT = LEJP_FLAG_WS_KEEP | 11,
        LEJP_MP_VALUE_NUM_EXP = LEJP_FLAG_WS_KEEP | 12,
        LEJP_MP_VALUE_TOK = LEJP_FLAG_WS_KEEP | 13,
        LEJP_MP_COMMA_OR_END = 14,
        LEJP_MP_ARRAY_END = 15,
};

◆ lejp_reasons

enum lejp_reasons

Enumerator
LEJP_CONTINUE
LEJP_REJECT_IDLE_NO_BRACE
LEJP_REJECT_MEMBERS_NO_CLOSE
LEJP_REJECT_MP_NO_OPEN_QUOTE
LEJP_REJECT_MP_STRING_UNDERRUN
LEJP_REJECT_MP_ILLEGAL_CTRL
LEJP_REJECT_MP_STRING_ESC_ILLEGAL_ESC
LEJP_REJECT_ILLEGAL_HEX
LEJP_REJECT_MP_DELIM_MISSING_COLON
LEJP_REJECT_MP_DELIM_BAD_VALUE_START
LEJP_REJECT_MP_VAL_NUM_INT_NO_FRAC
LEJP_REJECT_MP_VAL_NUM_FORMAT
LEJP_REJECT_MP_VAL_NUM_EXP_BAD_EXP
LEJP_REJECT_MP_VAL_TOK_UNKNOWN
LEJP_REJECT_MP_C_OR_E_UNDERF
LEJP_REJECT_MP_C_OR_E_NOTARRAY
LEJP_REJECT_MP_ARRAY_END_MISSING
LEJP_REJECT_STACK_OVERFLOW
LEJP_REJECT_MP_DELIM_ISTACK
LEJP_REJECT_NUM_TOO_LONG
LEJP_REJECT_MP_C_OR_E_NEITHER
LEJP_REJECT_UNKNOWN
LEJP_REJECT_CALLBACK

Definition at line 59 of file lws-lejp.h.

                  {
        LEJP_CONTINUE = -1,
        LEJP_REJECT_IDLE_NO_BRACE = -2,
        LEJP_REJECT_MEMBERS_NO_CLOSE = -3,
        LEJP_REJECT_MP_NO_OPEN_QUOTE = -4,
        LEJP_REJECT_MP_STRING_UNDERRUN = -5,
        LEJP_REJECT_MP_ILLEGAL_CTRL = -6,
        LEJP_REJECT_MP_STRING_ESC_ILLEGAL_ESC = -7,
        LEJP_REJECT_ILLEGAL_HEX = -8,
        LEJP_REJECT_MP_DELIM_MISSING_COLON = -9,
        LEJP_REJECT_MP_DELIM_BAD_VALUE_START = -10,
        LEJP_REJECT_MP_VAL_NUM_INT_NO_FRAC = -11,
        LEJP_REJECT_MP_VAL_NUM_FORMAT = -12,
        LEJP_REJECT_MP_VAL_NUM_EXP_BAD_EXP = -13,
        LEJP_REJECT_MP_VAL_TOK_UNKNOWN = -14,
        LEJP_REJECT_MP_C_OR_E_UNDERF = -15,
        LEJP_REJECT_MP_C_OR_E_NOTARRAY = -16,
        LEJP_REJECT_MP_ARRAY_END_MISSING = -17,
        LEJP_REJECT_STACK_OVERFLOW = -18,
        LEJP_REJECT_MP_DELIM_ISTACK = -19,
        LEJP_REJECT_NUM_TOO_LONG = -20,
        LEJP_REJECT_MP_C_OR_E_NEITHER = -21,
        LEJP_REJECT_UNKNOWN = -22,
        LEJP_REJECT_CALLBACK = -23
};

◆ lejp_callbacks

enum lejp_callbacks

Enumerator
LEJPCB_CONSTRUCTED
LEJPCB_DESTRUCTED
LEJPCB_START
LEJPCB_COMPLETE
LEJPCB_FAILED
LEJPCB_PAIR_NAME
LEJPCB_VAL_TRUE
LEJPCB_VAL_FALSE
LEJPCB_VAL_NULL
LEJPCB_VAL_NUM_INT
LEJPCB_VAL_NUM_FLOAT
LEJPCB_VAL_STR_START
LEJPCB_VAL_STR_CHUNK
LEJPCB_VAL_STR_END
LEJPCB_ARRAY_START
LEJPCB_ARRAY_END
LEJPCB_OBJECT_START
LEJPCB_OBJECT_END
LEJPCB_USER_START

Definition at line 87 of file lws-lejp.h.

                    {
        LEJPCB_CONSTRUCTED      = 0,
        LEJPCB_DESTRUCTED       = 1,
 
        LEJPCB_START            = 2,
        LEJPCB_COMPLETE         = 3,
        LEJPCB_FAILED           = 4,
 
        LEJPCB_PAIR_NAME        = 5,
 
        LEJPCB_VAL_TRUE         = LEJP_FLAG_CB_IS_VALUE | 6,
        LEJPCB_VAL_FALSE        = LEJP_FLAG_CB_IS_VALUE | 7,
        LEJPCB_VAL_NULL         = LEJP_FLAG_CB_IS_VALUE | 8,
        LEJPCB_VAL_NUM_INT      = LEJP_FLAG_CB_IS_VALUE | 9,
        LEJPCB_VAL_NUM_FLOAT    = LEJP_FLAG_CB_IS_VALUE | 10,
        LEJPCB_VAL_STR_START    = 11, /* notice handle separately */
        LEJPCB_VAL_STR_CHUNK    = LEJP_FLAG_CB_IS_VALUE | 12,
        LEJPCB_VAL_STR_END      = LEJP_FLAG_CB_IS_VALUE | 13,
 
        LEJPCB_ARRAY_START      = 14,
        LEJPCB_ARRAY_END        = 15,
 
        LEJPCB_OBJECT_START     = 16,
        LEJPCB_OBJECT_END       = 17,
 
        LEJPCB_USER_START       = 32,
};

◆ num_flags

enum num_flags

Enumerator
LEJP_SEEN_MINUS
LEJP_SEEN_POINT
LEJP_SEEN_POST_POINT
LEJP_SEEN_EXP

Definition at line 197 of file lws-lejp.h.

               {
        LEJP_SEEN_MINUS         = (1 << 0),
        LEJP_SEEN_POINT         = (1 << 1),
        LEJP_SEEN_POST_POINT    = (1 << 2),
        LEJP_SEEN_EXP           = (1 << 3)
};

Function Documentation

◆ _lejp_callback()

LWS_EXTERN signed char _lejp_callback	(	struct lejp_ctx *	ctx,
		char	reason
	)

_lejp_callback() - User parser actions

Parameters

ctx LEJP context

reason

Callback reason

 Your user callback is associated with the context at construction time,
 and receives calls as the parsing progresses.

 All of the callbacks may be ignored and just return 0.

 The reasons it might get called, found in @reason, are:

LEJPCB_CONSTRUCTED: The context was just constructed... you might want to perform one-time allocation for the life of the context.

LEJPCB_DESTRUCTED: The context is being destructed... if you made any allocations at construction-time, you can free them now

LEJPCB_START: Parsing is beginning at the first byte of input

LEJPCB_COMPLETE: Parsing has completed successfully. You'll get a 0 or positive return code from lejp_parse indicating the amount of unused bytes left in the input buffer

LEJPCB_FAILED: Parsing failed. You'll get a negative error code returned from lejp_parse

LEJPCB_PAIR_NAME: When a "name":"value" pair has had the name parsed, this callback occurs. You can find the new name at the end of ctx->path[]

LEJPCB_VAL_TRUE: The "true" value appeared

LEJPCB_VAL_FALSE: The "false" value appeared

LEJPCB_VAL_NULL: The "null" value appeared

LEJPCB_VAL_NUM_INT: A string representing an integer is in ctx->buf

LEJPCB_VAL_NUM_FLOAT: A string representing a float is in ctx->buf

LEJPCB_VAL_STR_START: We are starting to parse a string, no data yet

LEJPCB_VAL_STR_CHUNK: We filled the string buffer in the ctx, but it's not the end of the string. We produce this to spill the intermediate buffer to the user code, so we can handle huge JSON strings using only the small buffer in the ctx. If the whole JSON string fits in the ctx buffer, you won't get these callbacks.

LEJPCB_VAL_STR_END: String parsing has completed, the last chunk of the string is in ctx->buf.

LEJPCB_ARRAY_START: An array started

LEJPCB_ARRAY_END: An array ended

LEJPCB_OBJECT_START: An object started

LEJPCB_OBJECT_END: An object ended

◆ lejp_construct()

LWS_VISIBLE LWS_EXTERN void lejp_construct	(	struct lejp_ctx *	ctx,
		signed char()(struct lejp_ctx ctx, char reason)	callback,
		void *	user,
		const char const	paths,
		unsigned char	paths_count
	)

◆ lejp_destruct()

LWS_VISIBLE LWS_EXTERN void lejp_destruct ( struct lejp_ctx * ctx )

◆ lejp_parse()

LWS_VISIBLE LWS_EXTERN int lejp_parse	(	struct lejp_ctx *	ctx,
		const unsigned char *	json,
		int	len
	)

◆ lejp_change_callback()

LWS_VISIBLE LWS_EXTERN void lejp_change_callback	(	struct lejp_ctx *	ctx,
		signed char()(struct lejp_ctx ctx, char reason)	callback
	)

◆ lejp_parser_push()

LWS_VISIBLE LWS_EXTERN int lejp_parser_push	(	struct lejp_ctx *	ctx,
		void *	user,
		const char const	paths,
		unsigned char	paths_count,
		lejp_callback	lejp_cb
	)

◆ lejp_parser_pop()

LWS_VISIBLE LWS_EXTERN int lejp_parser_pop ( struct lejp_ctx * ctx )

◆ lejp_check_path_match()

LWS_VISIBLE LWS_EXTERN void lejp_check_path_match ( struct lejp_ctx * ctx )

◆ lejp_get_wildcard()

LWS_VISIBLE LWS_EXTERN int lejp_get_wildcard	(	struct lejp_ctx *	ctx,
		int	wildcard,
		char *	dest,
		int	len
	)

◆ lejp_error_to_string()

LWS_VISIBLE LWS_EXTERN const char * lejp_error_to_string ( int e )

Data Structures

Macros

Typedefs

Enumerations

Functions