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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 "./runtime.h"
#include <lib/inst.h>
void usage(const char *program_name, FILE *out)
{
fprintf(out,
"Usage: %s [OPTIONS] FILE\n"
"\t FILE: Bytecode file to execute\n"
"\tOptions:\n"
"\t\t To be developed...\n",
program_name);
}
int main(int argc, char *argv[])
{
if (argc == 1)
{
usage(argv[0], stderr);
return 1;
}
const char *filename = argv[1];
#if VERBOSE >= 1
printf("[%sINTERPRETER%s]: Interpreting `%s`\n", TERM_YELLOW, TERM_RESET,
filename);
#endif
FILE *fp = fopen(filename, "rb");
size_t number = 0;
inst_t *instructions = insts_read_bytecode_file(fp, &number);
fclose(fp);
#if VERBOSE >= 1
printf("\t[%sBYTECODE-READER%s]: Read %lu instructions\n", TERM_GREEN,
TERM_RESET, number);
#endif
size_t stack_size = 256;
byte *stack = calloc(stack_size, 1);
registers_t registers = {0};
darr_init(®isters, 8 * WORD_SIZE);
heap_t heap = {0};
heap_create(&heap);
vm_t vm = {0};
vm_load_stack(&vm, stack, stack_size);
vm_load_program(&vm, instructions, number);
vm_load_registers(&vm, registers);
vm_load_heap(&vm, heap);
#if VERBOSE >= 1
printf("\t[%sVM-SETUP%s]: Loaded stack and program into VM\n", TERM_GREEN,
TERM_RESET);
#endif
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;
}
vm_stop(&vm);
#if VERBOSE >= 1
printf("[%sINTERPRETER%s]: Finished execution\n", TERM_GREEN, TERM_RESET);
#endif
return ret;
}
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