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irunt.c
250 lines (207 loc) · 5.39 KB
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irunt.c
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#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include "runt.h"
#define CELLPOOL_SIZE 512
#define MEMPOOL_SIZE 4 * RUNT_MEGABYTE
typedef struct {
runt_vm vm;
unsigned char *mem;
runt_cell *cells;
int batch_mode;
unsigned int ncells;
size_t memsize;
} irunt_data;
static runt_int parse(runt_vm *vm, char *str, size_t read)
{
const char *code = str;
runt_int rc;
runt_pmark_set(vm);
rc = runt_compile(vm, code);
runt_pmark_free(vm);
return rc;
}
static runt_int load_dictionary_handle(runt_vm *vm, FILE *fp)
{
char *line = NULL;
size_t len = 0;
ssize_t read;
runt_int rc = RUNT_OK;
while((read = runt_getline(&line, &len, fp)) != -1) {
rc = parse(vm, line, read);
if(rc == RUNT_NOT_OK) {
runt_print(vm, "Bad return value. Dipping out.\n");
break;
}
}
free(line);
return rc;
}
static runt_int load_dictionary(runt_vm *vm, char *filename)
{
FILE *fp;
fp = fopen(filename, "r");
if(fp == NULL) {
runt_print(vm, "Could not open file %s\n", filename);
return RUNT_NOT_OK;
}
load_dictionary_handle(vm, fp);
fclose(fp);
return RUNT_OK;
}
runt_int runt_parse_file(runt_vm *vm, const char *filename)
{
FILE *fp;
runt_int rc;
fp = fopen(filename, "r");
if(fp == NULL) {
runt_print(vm, "Could not open file %s\n", filename);
return RUNT_NOT_OK;
}
rc = runt_parse_filehandle(vm, fp);
fclose(fp);
return rc;
}
runt_int runt_parse_filehandle(runt_vm *vm, FILE *fp)
{
char *line = NULL;
size_t len = 0;
ssize_t read;
runt_int rc = RUNT_OK;
if(fp == NULL) return RUNT_NOT_OK;
while((read = runt_getline(&line, &len, fp)) != -1) {
rc = parse(vm, line, read);
if(rc == RUNT_NOT_OK) break;
}
free(line);
return rc;
}
static int irunt_get_flag(irunt_data *irunt,
char *argv[],
runt_int pos,
runt_int nargs,
runt_int *n)
{
char flag = *(argv[pos] + 1);
runt_vm *vm = &irunt->vm;
switch(flag) {
case 'b':
irunt->batch_mode = 1;
*n = 1;
return RUNT_OK;
case 'i':
irunt->batch_mode = 0;
*n = 1;
return RUNT_OK;
case 'c':
if(pos + 1 <= nargs) {
irunt->ncells = atoi(argv[pos + 1]);
} else {
runt_print(vm, "Not enough arguments for -c\n");
}
*n = 2;
return RUNT_OK;
case 'm':
if(pos + 1 <= nargs) {
irunt->memsize = atol(argv[pos + 1]);
} else {
runt_print(vm, "Not enough arguments for -c\n");
}
*n = 2;
return RUNT_OK;
default:
runt_print(vm, "Error: Couldn't find flag %s\n", argv[pos]);
break;
}
return RUNT_NOT_OK;
}
/*TODO: simplify arg parsing function. Too many "clever" hacks. */
static int irunt_parse_args(irunt_data *irunt, int argc, char *argv[])
{
runt_int a;
runt_int argpos = argc;
runt_int n;
if(argc == 1) return 0;
for(a = 1; a < argc; a++) {
n = 0;
if(argv[a][0] == '-') {
if(irunt_get_flag(irunt, argv, a, argc, &n) != RUNT_OK) return -1;
argpos -= n;
a += (n - 1);
} else {
break;
}
}
return argpos;
}
static void irunt_init(irunt_data *irunt)
{
runt_init(&irunt->vm);
irunt->batch_mode = 1;
irunt->ncells = 512;
irunt->memsize = 4 * RUNT_MEGABYTE;
}
runt_int irunt_begin(int argc, char *argv[], runt_int (*loader)(runt_vm *))
{
irunt_data irunt;
char *line = NULL;
size_t len = 0;
ssize_t read;
runt_vm *vm;
int argpos = 0;
irunt_init(&irunt);
argpos = irunt_parse_args(&irunt, argc, argv);
if(argpos < 0) return 1;
argv = &argv[argc - argpos];
argc = argpos;
vm = &irunt.vm;
vm->argc = argc;
vm->argv = argv;
vm->argpos = argpos;
irunt.mem = malloc(irunt.memsize);
irunt.cells = malloc(sizeof(runt_cell) * irunt.ncells);
runt_cell_pool_set(vm, irunt.cells, irunt.ncells);
runt_cell_pool_init(vm);
runt_memory_pool_set(vm, irunt.mem, irunt.memsize);
vm->loader = loader;
loader(vm);
runt_pmark_set(vm);
if(irunt.batch_mode) {
runt_set_state(vm, RUNT_MODE_INTERACTIVE, RUNT_ON);
}
if(argc > 1) load_dictionary(vm, argv[1]);
if(irunt.batch_mode && argc == 0) load_dictionary_handle(vm, stdin);
if(!irunt.batch_mode) {
runt_set_state(vm, RUNT_MODE_INTERACTIVE, RUNT_ON);
while(runt_is_alive(vm) == RUNT_OK) {
printf("> ");
fflush(stdout);
read = runt_getline(&line, &len, stdin);
parse(vm, line, read);
}
}
runt_close_plugins(vm);
free(line);
free(irunt.cells);
free(irunt.mem);
return 0;
}
int runt_vm_alloc(runt_vm *vm, runt_uint ncells, runt_uint memsize)
{
unsigned char *mem;
runt_cell *cells;
mem = malloc(memsize);
cells = malloc(sizeof(runt_cell) * ncells);
runt_init(vm);
runt_cell_pool_set(vm, cells, ncells);
runt_cell_pool_init(vm);
runt_memory_pool_set(vm, mem, memsize);
return RUNT_OK;
}
int runt_vm_free(runt_vm *vm)
{
runt_close_plugins(vm);
free(vm->cell_pool.cells);
free(vm->memory_pool.data);
return RUNT_OK;
}