72 lines
1.6 KiB
C
Executable File
72 lines
1.6 KiB
C
Executable File
#ifndef _JSONPARSER_H_
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#define _JSONPARSER_H_
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#include <stddef.h>
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#define JSON_PARENT_LINKS ENABLE
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/**
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* JSON type identifier. Basic types are:
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* o Object
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* o Array
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* o String
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* o Other primitive: number, boolean (true/false) or null
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*/
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typedef enum {
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JSON_UNDEFINED = 0,
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JSON_OBJECT = 1,
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JSON_ARRAY = 2,
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JSON_STRING = 3,
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JSON_PRIMITIVE = 4
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} jsontype_t;
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enum jsonerr {
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/* Not enough tokens were provided */
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JSON_ERROR_NOMEM = -1,
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/* Invalid character inside JSON string */
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JSON_ERROR_INVAL = -2,
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/* The string is not a full JSON packet, more bytes expected */
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JSON_ERROR_PART = -3
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};
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/**
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* JSON token description.
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* type type (object, array, string etc.)
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* start start position in JSON data string
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* end end position in JSON data string
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*/
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typedef struct {
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jsontype_t type;
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int start;
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int end;
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int size;
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#ifdef JSON_PARENT_LINKS
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int parent;
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#endif
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} jsontok_t;
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/**
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* JSON parser. Contains an array of token blocks available. Also stores
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* the string being parsed now and current position in that string
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*/
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typedef struct {
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unsigned int pos; /* offset in the JSON string */
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unsigned int toknext; /* next token to allocate */
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int toksuper; /* superior token node, e.g parent object or array */
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} json_parser;
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/**
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* Create JSON parser over an array of tokens
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*/
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void json_init(json_parser *parser);
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/**
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* Run JSON parser. It parses a JSON data string into and array of tokens, each describing
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* a single JSON object.
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*/
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int json_parse(json_parser *parser, const char *js, size_t len,
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jsontok_t *tokens, unsigned int num_tokens);
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#endif //_JSONPARSER_H_
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