/**
 * @file ir_machine.h
 * @description A very basic intermediate representation storage.
 *
 * @note All intermediate reps are sizeof uint8_t
 */ 

#ifndef IRMACHINE_H
#define IRMACHINE_H

#include <stddef.h>
#include <stdint.h>

#include "sv.h"
#include "symtab.h"

// STMT
#define VAR_DECL  (uint64_t)0x10000000
#define VAR_ASSIGN  (uint64_t)0x01000000

// SYM
#define SYM (uint64_t)0x00100000

#define NUMBER64       (uint64_t)0
#define VAR_DECL_QWORD VAR_DECL | (uint64_t)0x1
#define VAR_DECL_DWORD VAR_DECL | (uint64_t)0x2
#define VAR_DECL_WORD  VAR_DECL | (uint64_t)0x3
#define VAR_DECL_BYTE  VAR_DECL | (uint64_t)0x4
#define STMT_DONE      (uint64_t)5
#define SYM_VAR        (uint64_t)6
#define SYM_FUNC       (uint64_t)7

enum irm_state {
	IRM_PANIC,
	IRM_GRACEFUL
};

struct irm {
	uint64_t *storage; // performance, easier to manage.
	size_t size;
	size_t curr_pos;
	enum irm_state state;
	struct symbol_table symtab;
	size_t stackdepth;
	size_t scopedepth;
};

void irm_init(struct irm *irm);
void irm_panic(struct irm *irm);
void irm_stmt_enter_scope(struct irm *irm);
void irm_stmt_leave_scope(struct irm *irm);
void irm_stmt_done(struct irm *irm);
void irm_push(struct irm *irm, uint64_t type);
void irm_push_64v(struct irm *irm, uint64_t type, uint64_t value);
void irm_push_lookup_sym(struct irm *irm, uint64_t type, struct string_view sym);
void irm_push_sym(struct irm *irm, uint64_t type, struct string_view sym);

#endif