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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <mruby.h>
#include <mruby/irep.h>
#include <mruby/dump.h>
struct strip_args {
int argc_start;
int argc;
char **argv;
mrb_bool lvar;
};
static void
irep_remove_lv(mrb_state *mrb, mrb_irep *irep)
{
size_t i;
if (irep->lv) {
mrb_free(mrb, irep->lv);
irep->lv = NULL;
}
for (i = 0; i < irep->rlen; ++i) {
irep_remove_lv(mrb, irep->reps[i]);
}
}
static void
print_usage(const char *f)
{
printf("Usage: %s [switches] irepfiles\n", f);
printf("switches:\n");
printf(" -l, --lvar remove LVAR section too.\n");
}
static int
parse_args(int argc, char **argv, struct strip_args *args)
{
int i;
args->argc_start = 0;
args->argc = argc;
args->argv = argv;
args->lvar = FALSE;
for (i = 1; i < argc; ++i) {
const size_t len = strlen(argv[i]);
if (len >= 2 && argv[i][0] == '-') {
switch (argv[i][1]) {
case 'l':
args->lvar = TRUE;
break;
case '-':
if (strncmp((*argv) + 2, "lvar", len) == 0) {
args->lvar = TRUE;
break;
}
default:
return -1;
}
}
else {
break;
}
}
args->argc_start = i;
return i;
}
static int
strip(mrb_state *mrb, struct strip_args *args)
{
int i;
for (i = args->argc_start; i < args->argc; ++i) {
char *filename;
FILE *rfile;
mrb_irep *irep;
FILE *wfile;
int dump_result;
filename = args->argv[i];
rfile = fopen(filename, "rb");
if (rfile == NULL) {
fprintf(stderr, "can't open file for reading %s\n", filename);
return EXIT_FAILURE;
}
irep = mrb_read_irep_file(mrb, rfile);
fclose(rfile);
if (irep == NULL) {
fprintf(stderr, "can't read irep file %s\n", filename);
return EXIT_FAILURE;
}
/* clear lv if --lvar is enabled */
if (args->lvar) {
irep_remove_lv(mrb, irep);
}
wfile = fopen(filename, "wb");
if (wfile == NULL) {
fprintf(stderr, "can't open file for writing %s\n", filename);
mrb_irep_decref(mrb, irep);
return EXIT_FAILURE;
}
/* debug flag must always be false */
dump_result = mrb_dump_irep_binary(mrb, irep, FALSE, wfile);
fclose(wfile);
mrb_irep_decref(mrb, irep);
if (dump_result != MRB_DUMP_OK) {
fprintf(stderr, "error occurred during dumping %s\n", filename);
return EXIT_FAILURE;
}
}
return EXIT_SUCCESS;
}
int
main(int argc, char **argv)
{
struct strip_args args;
int args_result;
mrb_state *mrb;
int ret;
if (argc <= 1) {
printf("no files to strip\n");
print_usage(argv[0]);
return EXIT_FAILURE;
}
args_result = parse_args(argc, argv, &args);
if (args_result < 0) {
print_usage(argv[0]);
return EXIT_FAILURE;
}
mrb = mrb_open_core(mrb_default_allocf, NULL);
if (mrb == NULL) {
fputs("Invalid mrb_state, exiting mruby-strip\n", stderr);
return EXIT_FAILURE;
}
ret = strip(mrb, &args);
mrb_close(mrb);
return ret;
}
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