88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <assert.h>
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#include <stdbool.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 "util.h"
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static long chars = 65;
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static struct linebuf b = EMPTY_LINEBUF;
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static long n_columns;
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static long 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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long i, l, col;
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size_t maxlen = 0;
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char *space;
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FILE *fp;
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ARGBEGIN {
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case 'c':
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chars = estrtol(EARGF(usage()), 0);
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if(chars < 3)
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eprintf("%d: too few character columns");
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break;
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default:
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usage();
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} ARGEND;
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/* XXX librarify this chunk, too? only useful in sponges though */
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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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size_t len = strlen(b.lines[l]);
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if(len > 0 && b.lines[l][len-1] == '\n')
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b.lines[l][--len] = '\0';
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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 EXIT_SUCCESS;
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}
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if(!(space = malloc(maxlen + 2)))
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eprintf("malloc:");
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memset(space, ' ', maxlen + 1);
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space[maxlen + 1] = '\0';
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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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/*sprintf(b.lines[l], "%ld,%ld$", i, col);*/
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fputs(b.lines[l], stdout);
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if(col < n_columns)
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fputs(space + strlen(b.lines[l]), stdout);
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}
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fputs("\n", stdout);
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}
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return EXIT_SUCCESS;
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}
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