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// Copyright (c) 2021 Peter Ohler, All rights reserved.
// Licensed under the MIT License. See LICENSE file in the project root for license details.
#ifndef OJ_PARSER_H
#define OJ_PARSER_H
#include <ruby.h>
#include <stdbool.h>
#include "buf.h"
#define TOP_FUN 0
#define ARRAY_FUN 1
#define OBJECT_FUN 2
typedef uint8_t byte;
typedef enum {
OJ_NONE = '\0',
OJ_NULL = 'n',
OJ_TRUE = 't',
OJ_FALSE = 'f',
OJ_INT = 'i',
OJ_DECIMAL = 'd',
OJ_BIG = 'b', // indicates parser buf is used
OJ_STRING = 's',
OJ_OBJECT = 'o',
OJ_ARRAY = 'a',
} ojType;
typedef struct _num {
long double dub;
int64_t fixnum; // holds all digits
uint32_t len;
int16_t div; // 10^div
int16_t exp;
uint8_t shift; // shift of fixnum to get decimal
bool neg;
bool exp_neg;
// for numbers as strings, reuse buf
} *Num;
struct _ojParser;
typedef struct _funcs {
void (*add_null)(struct _ojParser *p);
void (*add_true)(struct _ojParser *p);
void (*add_false)(struct _ojParser *p);
void (*add_int)(struct _ojParser *p);
void (*add_float)(struct _ojParser *p);
void (*add_big)(struct _ojParser *p);
void (*add_str)(struct _ojParser *p);
void (*open_array)(struct _ojParser *p);
void (*close_array)(struct _ojParser *p);
void (*open_object)(struct _ojParser *p);
void (*close_object)(struct _ojParser *p);
} *Funcs;
typedef struct _ojParser {
const char *map;
const char *next_map;
int depth;
unsigned char stack[1024];
// value data
struct _num num;
struct _buf key;
struct _buf buf;
struct _funcs funcs[3]; // indexed by XXX_FUN defines
void (*start)(struct _ojParser *p);
VALUE (*option)(struct _ojParser *p, const char *key, VALUE value);
VALUE (*result)(struct _ojParser *p);
void (*free)(struct _ojParser *p);
void (*mark)(struct _ojParser *p);
void *ctx;
VALUE reader;
char token[8];
long line;
long cur; // only set before call to a function
long col;
int ri;
uint32_t ucode;
ojType type; // valType
bool just_one;
} *ojParser;
// Create a new parser without setting the delegate. The parser is
// wrapped. The parser is (ojParser)DATA_PTR(value) where value is the return
// from this function. A delegate must be added before the parser can be
// used. Optionally oj_parser_set_options can be called if the options are not
// set directly.
extern VALUE oj_parser_new();
// Set set the options from a hash (ropts).
extern void oj_parser_set_option(ojParser p, VALUE ropts);
#endif /* OJ_PARSER_H */
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