117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
/* Copyright (C) 2016 Jeremiah Orians
|
|
* This file is part of stage0.
|
|
*
|
|
* stage0 is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* stage0 is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with stage0. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "vm.h"
|
|
#include <getopt.h>
|
|
|
|
/* Load program tape into Memory */
|
|
void load_program(struct lilith* vm, char* rom_name)
|
|
{
|
|
FILE* program;
|
|
program = fopen(rom_name, "r");
|
|
|
|
/* Figure out how much we need to load */
|
|
fseek(program, 0, SEEK_END);
|
|
size_t end = ftell(program);
|
|
rewind(program);
|
|
|
|
/* Load the entire tape into memory */
|
|
fread(vm->memory, 1, end, program);
|
|
|
|
fclose(program);
|
|
}
|
|
|
|
void execute_vm(struct lilith* vm)
|
|
{
|
|
struct Instruction* current;
|
|
current = calloc(1, sizeof(struct Instruction));
|
|
|
|
while(!vm->halted)
|
|
{
|
|
read_instruction(vm, current);
|
|
eval_instruction(vm, current);
|
|
}
|
|
|
|
free(current);
|
|
return;
|
|
}
|
|
|
|
/* Standard C main program */
|
|
int main(int argc, char **argv)
|
|
{
|
|
int c;
|
|
|
|
tape_01_name = "tape_01";
|
|
tape_02_name = "tape_02";
|
|
char* rom_name = NULL;
|
|
|
|
static struct option long_options[] = {
|
|
{"rom", required_argument, 0, 'r'},
|
|
{"tape_01", required_argument, 0, '1'},
|
|
{"tape_02", required_argument, 0, '2'},
|
|
{"help", no_argument, 0, 'h'},
|
|
{0, 0, 0, 0}
|
|
};
|
|
int option_index = 0;
|
|
while ((c = getopt_long(argc, argv, "r:h:1:2", long_options, &option_index)) != -1)
|
|
{
|
|
switch (c)
|
|
{
|
|
case 0: break;
|
|
case 'r':
|
|
{
|
|
rom_name = optarg;
|
|
break;
|
|
}
|
|
case 'h':
|
|
{
|
|
fprintf(stdout, "Usage: %s --rom $rom [--tape_01 $foo] [--tape_02 $bar]\n", argv[0]);
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
case '1':
|
|
{
|
|
tape_01_name = optarg;
|
|
break;
|
|
}
|
|
case '2':
|
|
{
|
|
tape_02_name = optarg;
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
}
|
|
|
|
if(NULL == rom_name)
|
|
{
|
|
fprintf(stderr, "Usage: %s --rom $rom [--tape_01 $foo] [--tape_02 $bar]\n", argv[0]);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
/* Perform all the essential stages in order */
|
|
struct lilith* vm;
|
|
vm = create_vm(1 << 21);
|
|
load_program(vm, rom_name);
|
|
execute_vm(vm);
|
|
destroy_vm(vm);
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|