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/* See LICENSE file for copyright and license details. */
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "utf.h"
#include "util.h"
static int iflag = 0;
static size_t *tablist = NULL;
static size_t tablistlen = 0;
static size_t
parselist(const char *s)
{
size_t i;
char *p, *tmp;
tmp = estrdup(s);
for (i = 0; (p = strsep(&tmp, " ,")); i++) {
if (*p == '\0')
eprintf("empty field in tablist\n");
tablist = ereallocarray(tablist, i + 1, sizeof(*tablist));
tablist[i] = estrtonum(p, 1, MIN(LLONG_MAX, SIZE_MAX));
if (i > 0 && tablist[i - 1] >= tablist[i])
eprintf("tablist must be ascending\n");
}
tablist = ereallocarray(tablist, i + 1, sizeof(*tablist));
/* tab length = 1 for the overflowing case later in the matcher */
tablist[i] = 1;
return i;
}
static int
expand(const char *file, FILE *fp)
{
size_t bol = 1, col = 0, i;
Rune r;
while (efgetrune(&r, fp, file)) {
switch (r) {
case '\t':
if (tablistlen == 1)
i = 0;
else for (i = 0; i < tablistlen; i++)
if (col < tablist[i])
break;
if (bol || !iflag) {
do {
col++;
putchar(' ');
} while (col % tablist[i]);
} else {
putchar('\t');
col = tablist[i];
}
break;
case '\b':
bol = 0;
if (col)
col--;
putchar('\b');
break;
case '\n':
bol = 1;
col = 0;
putchar('\n');
break;
default:
col++;
if (r != ' ')
bol = 0;
efputrune(&r, stdout, "<stdout>");
break;
}
}
return 0;
}
static void
usage(void)
{
eprintf("usage: %s [-i] [-t tablist] [file ...]\n", argv0);
}
int
main(int argc, char *argv[])
{
FILE *fp;
int ret = 0;
char *tl = "8";
ARGBEGIN {
case 'i':
iflag = 1;
break;
case 't':
tl = EARGF(usage());
if (!*tl)
eprintf("tablist cannot be empty\n");
break;
default:
usage();
} ARGEND
tablistlen = parselist(tl);
if (!argc) {
expand("<stdin>", stdin);
} else {
for (; *argv; argc--, argv++) {
if (!strcmp(*argv, "-")) {
*argv = "<stdin>";
fp = stdin;
} else if (!(fp = fopen(*argv, "r"))) {
weprintf("fopen %s:", *argv);
ret = 1;
continue;
}
expand(*argv, fp);
if (fp != stdin && fshut(fp, *argv))
ret = 1;
}
}
ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>");
return ret;
}
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