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/* See LICENSE file for copyright and license details. */
#include <sys/ioctl.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "text.h"
#include "util.h"
static void
usage(void)
{
eprintf("usage: %s [-c num] [file ...]\n", argv0);
}
int
main(int argc, char *argv[])
{
FILE *fp;
struct winsize w;
struct linebuf b = EMPTY_LINEBUF;
size_t chars = 65, maxlen = 0, i, j, k, len, cols, rows;
int cflag = 0, ret = 0;
char *p;
ARGBEGIN {
case 'c':
cflag = 1;
chars = estrtonum(EARGF(usage()), 1, MIN(LLONG_MAX, SIZE_MAX));
break;
default:
usage();
} ARGEND
if (!cflag) {
if ((p = getenv("COLUMNS")))
chars = estrtonum(p, 1, MIN(LLONG_MAX, SIZE_MAX));
else if (!ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) && w.ws_col > 0)
chars = w.ws_col;
}
if (!argc) {
getlines(stdin, &b);
} 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;
}
getlines(fp, &b);
if (fp != stdin && fshut(fp, *argv))
ret = 1;
}
}
for (i = 0; i < b.nlines; i++) {
for (j = 0, len = 0; j < b.lines[i].len; j++) {
if (UTF8_POINT(b.lines[i].data[j]))
len++;
}
if (len && b.lines[i].data[b.lines[i].len - 1] == '\n') {
b.lines[i].data[--(b.lines[i].len)] = '\0';
len--;
}
if (len > maxlen)
maxlen = len;
}
for (cols = 1; (cols + 1) * maxlen + cols <= chars; cols++);
rows = b.nlines / cols + (b.nlines % cols > 0);
for (i = 0; i < rows; i++) {
for (j = 0; j < cols && i + j * rows < b.nlines; j++) {
for (k = 0, len = 0; k < b.lines[i + j * rows].len; k++) {
if (UTF8_POINT(b.lines[i + j * rows].data[k]))
len++;
}
fwrite(b.lines[i + j * rows].data, 1,
b.lines[i + j * rows].len, stdout);
if (j < cols - 1)
for (k = len; k < maxlen + 1; k++)
putchar(' ');
}
putchar('\n');
}
ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>");
return ret;
}
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