jsonapi.h File Reference

#include "lib/stringinfo.h"

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Data Structures
struct	JsonLexContext
struct	jsonSemAction
Typedefs
typedef struct JsonLexContext	JsonLexContext
typedef void(*	json_struct_action )(void *state)
typedef void(*	json_ofield_action )(void *state, char *fname, bool isnull)
typedef void(*	json_aelem_action )(void *state, bool isnull)
typedef void(*	json_scalar_action )(void *state, char *token, JsonTokenType tokentype)
typedef struct jsonSemAction	jsonSemAction
typedef struct jsonSemAction *	JsonSemAction
Enumerations
enum	JsonTokenType {   JSON_TOKEN_INVALID, JSON_TOKEN_STRING, JSON_TOKEN_NUMBER, JSON_TOKEN_OBJECT_START,   JSON_TOKEN_OBJECT_END, JSON_TOKEN_ARRAY_START, JSON_TOKEN_ARRAY_END, JSON_TOKEN_COMMA,   JSON_TOKEN_COLON, JSON_TOKEN_TRUE, JSON_TOKEN_FALSE, JSON_TOKEN_NULL,   JSON_TOKEN_END }
Functions
void	pg_parse_json (JsonLexContext *lex, JsonSemAction sem)
JsonLexContext *	makeJsonLexContext (text *json, bool need_escapes)

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Typedef Documentation

typedef void(* json_aelem_action)(void *state, bool isnull)

Definition at line 66 of file jsonapi.h.

typedef void(* json_ofield_action)(void *state, char *fname, bool isnull)

Definition at line 65 of file jsonapi.h.

typedef void(* json_scalar_action)(void *state, char *token, JsonTokenType tokentype)

Definition at line 67 of file jsonapi.h.

typedef void(* json_struct_action)(void *state)

Definition at line 64 of file jsonapi.h.

typedef struct JsonLexContext JsonLexContext

typedef struct jsonSemAction * JsonSemAction

typedef struct jsonSemAction jsonSemAction

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Enumeration Type Documentation

enum JsonTokenType

Enumerator:

JSON_TOKEN_INVALID
JSON_TOKEN_STRING
JSON_TOKEN_NUMBER
JSON_TOKEN_OBJECT_START
JSON_TOKEN_OBJECT_END
JSON_TOKEN_ARRAY_START
JSON_TOKEN_ARRAY_END
JSON_TOKEN_COMMA
JSON_TOKEN_COLON
JSON_TOKEN_TRUE
JSON_TOKEN_FALSE
JSON_TOKEN_NULL
JSON_TOKEN_END

Definition at line 19 of file jsonapi.h.

{
    JSON_TOKEN_INVALID,
    JSON_TOKEN_STRING,
    JSON_TOKEN_NUMBER,
    JSON_TOKEN_OBJECT_START,
    JSON_TOKEN_OBJECT_END,
    JSON_TOKEN_ARRAY_START,
    JSON_TOKEN_ARRAY_END,
    JSON_TOKEN_COMMA,
    JSON_TOKEN_COLON,
    JSON_TOKEN_TRUE,
    JSON_TOKEN_FALSE,
    JSON_TOKEN_NULL,
    JSON_TOKEN_END,
}   JsonTokenType;

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Function Documentation

JsonLexContext* makeJsonLexContext	(	text *	json,
		bool	need_escapes
	)

Definition at line 240 of file json.c.

References JsonLexContext::input, JsonLexContext::input_length, JsonLexContext::line_number, JsonLexContext::line_start, makeStringInfo(), palloc0(), JsonLexContext::strval, JsonLexContext::token_terminator, VARDATA, and VARSIZE.

Referenced by each_worker(), get_json_object_as_hash(), get_worker(), json_array_elements(), json_array_length(), json_in(), json_object_keys(), json_populate_recordset(), and json_recv().

{
    JsonLexContext *lex = palloc0(sizeof(JsonLexContext));

    lex->input = lex->token_terminator = lex->line_start = VARDATA(json);
    lex->line_number = 1;
    lex->input_length = VARSIZE(json) - VARHDRSZ;
    if (need_escapes)
        lex->strval = makeStringInfo();
    return lex;
}

void pg_parse_json	(	JsonLexContext *	lex,
		JsonSemAction	sem
	)

Definition at line 263 of file json.c.

References json_lex(), JSON_PARSE_END, JSON_TOKEN_ARRAY_START, JSON_TOKEN_END, JSON_TOKEN_OBJECT_START, lex_expect(), lex_peek(), parse_array(), parse_object(), and parse_scalar().

Referenced by each_worker(), get_json_object_as_hash(), get_worker(), json_array_elements(), json_array_length(), json_in(), json_object_keys(), json_populate_recordset(), and json_recv().

{
    JsonTokenType tok;

    /* get the initial token */
    json_lex(lex);

    tok = lex_peek(lex);

    /* parse by recursive descent */
    switch (tok)
    {
        case JSON_TOKEN_OBJECT_START:
            parse_object(lex, sem);
            break;
        case JSON_TOKEN_ARRAY_START:
            parse_array(lex, sem);
            break;
        default:
            parse_scalar(lex, sem);     /* json can be a bare scalar */
    }

    lex_expect(JSON_PARSE_END, lex, JSON_TOKEN_END);

}