src/usr.bin/dc/dc.c - diff

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Diff for /src/usr.bin/dc/dc.c between version 1.3 and 1.4

version 1.3, 2003/09/19 19:06:29

version 1.4, 2003/12/01 09:13:24

Line 21

#endif /* not lint */

#include <err.h>

#include <stdlib.h>

#include <unistd.h>

#include <string.h>

#include "extern.h"

Line 33

Line 32

static __dead void

usage(void)

{

fprintf(stderr, "usage: %s [file]\n", __progname);

fprintf(stderr, "usage: %s [-x] [file]\n", __progname);

exit(1);

}

int

main(int argc, char *argv[])

{

int ch;

bool extended_regs = false;

FILE *file;

struct source src;

if (argc > 2)

/* accept and ignore a single dash to be 4.4BSD dc(1) compatible */

usage();

while ((ch = getopt(argc, argv, "x-")) != -1) {

switch (ch) {

case 'x':

extended_regs = true;

break;

case '-':

break;

default:

usage();

}

argc -= optind;

argv += optind;

init_bmachine();

init_bmachine(extended_regs);

setlinebuf(stdout);

setlinebuf(stderr);

if (argc == 2 && strcmp(argv[1], "-") != 0) {

file = fopen(argv[1], "r");

if (argc > 1)

usage();

else if (argc == 1) {

file = fopen(argv[0], "r");

if (file == NULL)

err(1, "cannot open file %s", argv[1]);

err(1, "cannot open file %s", argv[0]);

src_setstream(&src, file);

reset_bmachine(&src);

eval();