93 lines
1.7 KiB
C
93 lines
1.7 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <sys/ioctl.h>
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#include <limits.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "text.h"
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#include "utf.h"
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#include "util.h"
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static size_t chars = 65;
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static int cflag;
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static struct linebuf b = EMPTY_LINEBUF;
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static size_t n_columns;
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static size_t n_rows;
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static void
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usage(void)
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{
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eprintf("usage: %s [-c chars] [file ...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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size_t i, l, col, len, bytes, maxlen = 0;
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struct winsize w;
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FILE *fp;
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ARGBEGIN {
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case 'c':
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cflag = 1;
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chars = estrtonum(EARGF(usage()), 3, MIN(LLONG_MAX, SIZE_MAX));
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break;
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default:
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usage();
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} ARGEND;
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if (cflag == 0) {
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
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if (w.ws_col != 0)
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chars = w.ws_col;
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}
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if (argc == 0) {
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getlines(stdin, &b);
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} else for (; argc > 0; argc--, argv++) {
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if (!(fp = fopen(argv[0], "r")))
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eprintf("fopen %s:", argv[0]);
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getlines(fp, &b);
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fclose(fp);
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}
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for (l = 0; l < b.nlines; ++l) {
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len = utflen(b.lines[l]);
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bytes = strlen(b.lines[l]);
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if (len > 0 && b.lines[l][bytes - 1] == '\n') {
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b.lines[l][bytes - 1] = '\0';
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--len;
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}
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if (len > maxlen)
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maxlen = len;
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if (maxlen > (chars - 1) / 2)
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break;
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}
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n_columns = (chars + 1) / (maxlen + 1);
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if (n_columns <= 1) {
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for (l = 0; l < b.nlines; ++l) {
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fputs(b.lines[l], stdout);
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}
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return 0;
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}
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n_rows = (b.nlines + (n_columns - 1)) / n_columns;
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for (i = 0; i < n_rows; ++i) {
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for (l = i, col = 1; l < b.nlines; l += n_rows, ++col) {
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len = utflen(b.lines[l]);
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fputs(b.lines[l], stdout);
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if (col < n_columns)
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printf("%*s", (int)(maxlen + 1 - len), "");
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}
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fputs("\n", stdout);
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}
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return 0;
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}
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