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/* Copyright (C) 2023 Aryadev Chavali
* You may distribute and modify this code under the terms of the
* GPLv2 license. You should have received a copy of the GPLv2
* license with this file. If not, please write to:
* aryadev@aryadevchavali.com.
* Created: 2023-10-15
* Author: Aryadev Chavali
* Description: Entrypoint to program
*/
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "./inst.h"
#include "./runtime.h"
int interpret_bytecode(const char *filepath)
{
FILE *fp = fopen(filepath, "rb");
size_t number = 0;
inst_t *instructions = insts_read_bytecode_file(fp, &number);
fclose(fp);
byte stack[256];
vm_t vm = {0};
vm_load_stack(&vm, stack, ARR_SIZE(stack));
vm_load_program(&vm, instructions, number);
err_t err = vm_execute_all(&vm);
int ret = 0;
if (err)
{
const char *error_str = err_as_cstr(err);
fprintf(stderr, "[ERROR]: %s\n", error_str);
vm_print_all(&vm, stderr);
ret = 255 - err;
}
free(instructions);
return ret;
}
int assemble_instructions(inst_t *instructions, size_t number,
const char *filepath)
{
FILE *fp = fopen(filepath, "wb");
insts_write_bytecode_file(instructions, number, fp);
fclose(fp);
return 0;
}
int main(int argc, char *argv[])
{
const char *filename = "out.bin";
if (argc >= 2)
filename = argv[1];
inst_t instructions[] = {
INST_PUSH(BYTE, 0), INST_MOV(BYTE, 0),
INST_PUSH_REG(BYTE, 0), INST_PUSH(BYTE, 1), INST_PLUS(BYTE),
INST_MOV(BYTE, 0),
INST_PUSH_REG(BYTE, 0), INST_PUSH(BYTE, 5), INST_EQ(BYTE),
INST_NOT(BYTE), INST_JUMP_IF(BYTE, 2), INST_HALT,
};
assemble_instructions(instructions, ARR_SIZE(instructions), filename);
return interpret_bytecode(filename);
}
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