98 lines
2.1 KiB
C
98 lines
2.1 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 void
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usage(void)
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{
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eprintf("usage: %s [-c num] [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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FILE *fp;
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struct winsize w;
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struct linebuf b = EMPTY_LINEBUF;
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size_t chars = 65, maxlen = 0, i, j, k, len, cols, rows;
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int cflag = 0, ret = 0;
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char *p;
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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()), 1, 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) {
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if ((p = getenv("COLUMNS")))
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chars = estrtonum(p, 1, MIN(LLONG_MAX, SIZE_MAX));
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else if (!ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) && w.ws_col > 0)
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chars = w.ws_col;
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}
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if (!argc) {
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getlines(stdin, &b);
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} else {
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for (; *argv; argc--, argv++) {
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if (!strcmp(*argv, "-")) {
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*argv = "<stdin>";
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fp = stdin;
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} else if (!(fp = fopen(*argv, "r"))) {
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weprintf("fopen %s:", *argv);
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ret = 1;
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continue;
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}
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getlines(fp, &b);
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if (fp != stdin && fshut(fp, *argv))
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ret = 1;
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}
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}
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for (i = 0; i < b.nlines; i++) {
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/* TODO: fix libutf to run utflen on a memory chunk
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* of given size to also handle embedded NULs */
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len = utflen(b.lines[i].data);
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if (len && b.lines[i].data[b.lines[i].len - 1] == '\n') {
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b.lines[i].data[--(b.lines[i].len)] = '\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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}
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for (cols = 1; (cols + 1) * maxlen + cols <= chars; cols++);
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rows = b.nlines / cols + (b.nlines % cols > 0);
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for (i = 0; i < rows; i++) {
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for (j = 0; j < cols && i + j * rows < b.nlines; j++) {
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/* TODO: fix libutf to run utflen on a memory chunk
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* of given size to also handle embedded NULs */
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len = utflen(b.lines[i + j * rows].data);
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fwrite(b.lines[i + j * rows].data, 1,
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b.lines[i + j * rows].len, stdout);
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if (j < cols - 1)
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for (k = len; k < maxlen + 1; k++)
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putchar(' ');
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}
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putchar('\n');
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}
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ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>");
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return ret;
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}
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