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/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#define _XOPEN_SOURCE 700
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static int tabstop = 8;
//static int *tablist = NULL;
static int expand(const char *path)
{
FILE *f = stdin;
if (path) {
f = fopen(path, "rb");
}
if (f == NULL) {
fprintf(stderr, "expand: Couldn't open %s: %s\n", path ? path : "stdin", strerror(errno));
return 1;
}
int col = 0;
while (!feof(f)) {
int c = fgetc(f);
if (c != '\t') {
if (c == '\n') {
col = 0;
} else if (c == '\b') {
col--;
} else {
col++;
}
putchar(c);
continue;
}
if (tabstop != 0) {
do {
putchar(' ');
col++;
} while (col % tabstop);
continue;
}
/* TODO: next tabstop in tablist */
}
if (f != stdin) {
fclose(f);
}
return 0;
}
static int set_tablist(const char *list)
{
tabstop = atoi(list);
return 0;
}
int main(int argc, char *argv[])
{
int c;
while ((c = getopt(argc, argv, "t:")) != -1) {
switch (c) {
case 't': /** set tabs to [tablist] **/
if (set_tablist(optarg) != 0) {
return 1;
}
break;
default:
return 1;
}
}
int r = 0;
do {
r |= expand(argv[optind++]);
} while (optind < argc);
return r;
}
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