/*
 * nanowasm, a tiny WebAssembly/Wasm interpreter
 * Copyright (C) 2023-2024  Xavier Del Campo Romero
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#ifndef WASM_TYPES_H
#define WASM_TYPES_H

#include <nanowasm/nw.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>

typedef bool varuint1;
typedef signed char varint7;
typedef unsigned char varuint7;
typedef unsigned long varuint32;
typedef long varint32;
typedef unsigned long long varuint64;
typedef long long varint64;

#define VALUE_TYPES \
    X(VALUE_TYPE_I32) \
    X(VALUE_TYPE_I64) \
    X(VALUE_TYPE_F32) \
    X(VALUE_TYPE_F64)

enum value_type
{
#define X(x) x,
    VALUE_TYPES
#undef X
};

struct retval
{
    bool returns;
    enum value_type type;
};

struct nw_block
{
    long pc;
    struct nw_block *prev;
};

struct nw_locals
{
    enum value_type type;
    unsigned long n;
    struct nw_locals *next;
};

struct nw_frame
{
    struct retval retval;
    struct nw_locals *locals;
    struct nw_block *last_block;
    struct nw_frame *prev, *next;
};

struct nw_gframe
{
    enum value_type type;
    bool mutable;
    struct nw_gframe *next;
};

int varuint1_read(FILE *f, varuint1 *out);
int varint7_read(FILE *f, varint7 *out);
int varuint7_read(FILE *f, varuint7 *out);
int varuint32_read(FILE *f, varuint32 *out);
int varint32_read(FILE *f, varint32 *out);
int varuint64_read(FILE *f, varuint64 *out);
int varint64_read(FILE *f, varint64 *out);

int get_value_type(varint7 type, enum value_type *vtype);
size_t get_type_size(enum value_type type);
const char *value_type_tostr(enum value_type v);

int32_t htoni32(int32_t in);
int32_t ntohi32(int32_t in);

#endif