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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
#include "json.h"
/* This header should include all prototypes only the JSON parser itself and
* its tests need access to. Normal code consuming the JSON parser should not
* interface with this. */
typedef union JsonValue {
/* Encodes a simple value. On x86-64 this structure is 16 bytes wide (as long double is 128bit). */
bool boolean;
long double real;
intmax_t integer;
uintmax_t unsig;
} JsonValue;
/* Let's protect us against accidental structure size changes on our most relevant arch */
#ifdef __x86_64__
assert_cc(sizeof(JsonValue) == 16U);
#endif
#define JSON_VALUE_NULL ((JsonValue) {})
/* We use fake JsonVariant objects for some special values, in order to avoid memory allocations for them. Note that
* effectively this means that there are multiple ways to encode the same objects: via these magic values or as
* properly allocated JsonVariant. We convert between both on-the-fly as necessary. */
#define JSON_VARIANT_MAGIC_TRUE ((JsonVariant*) 1)
#define JSON_VARIANT_MAGIC_FALSE ((JsonVariant*) 2)
#define JSON_VARIANT_MAGIC_NULL ((JsonVariant*) 3)
#define JSON_VARIANT_MAGIC_ZERO_INTEGER ((JsonVariant*) 4)
#define JSON_VARIANT_MAGIC_ZERO_UNSIGNED ((JsonVariant*) 5)
#define JSON_VARIANT_MAGIC_ZERO_REAL ((JsonVariant*) 6)
#define JSON_VARIANT_MAGIC_EMPTY_STRING ((JsonVariant*) 7)
#define JSON_VARIANT_MAGIC_EMPTY_ARRAY ((JsonVariant*) 8)
#define JSON_VARIANT_MAGIC_EMPTY_OBJECT ((JsonVariant*) 9)
#define _JSON_VARIANT_MAGIC_MAX ((JsonVariant*) 10)
/* This is only safe as long as we don't define more than 4K magic pointers, i.e. the page size of the simplest
* architectures we support. That's because we rely on the fact that malloc() will never allocate from the first memory
* page, as it is a faulting page for catching NULL pointer dereferences. */
assert_cc((uintptr_t) _JSON_VARIANT_MAGIC_MAX < 4096U);
enum { /* JSON tokens */
JSON_TOKEN_END,
JSON_TOKEN_COLON,
JSON_TOKEN_COMMA,
JSON_TOKEN_OBJECT_OPEN,
JSON_TOKEN_OBJECT_CLOSE,
JSON_TOKEN_ARRAY_OPEN,
JSON_TOKEN_ARRAY_CLOSE,
JSON_TOKEN_STRING,
JSON_TOKEN_REAL,
JSON_TOKEN_INTEGER,
JSON_TOKEN_UNSIGNED,
JSON_TOKEN_BOOLEAN,
JSON_TOKEN_NULL,
_JSON_TOKEN_MAX,
_JSON_TOKEN_INVALID = -1,
};
int json_tokenize(const char **p, char **ret_string, JsonValue *ret_value, unsigned *ret_line, unsigned *ret_column, void **state, unsigned *line, unsigned *column);
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