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