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83 lines
1.4 KiB
C
83 lines
1.4 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <limits.h>
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#include <regex.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 void nl(const char *, FILE *);
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static char mode = 't';
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static const char *sep = "\t";
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static long incr = 1;
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static regex_t preg;
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static void
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usage(void)
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{
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eprintf("usage: %s [-b type] [-i incr] [-s sep] [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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char *r;
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ARGBEGIN {
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case 'b':
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r = EARGF(usage());
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mode = r[0];
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if (r[0] == 'p')
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eregcomp(&preg, &r[1], REG_NOSUB);
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else if (!strchr("ant", mode))
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usage();
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break;
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case 'i':
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incr = estrtonum(EARGF(usage()), 0, LONG_MAX);
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break;
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case 's':
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sep = EARGF(usage());
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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 (argc > 1)
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usage();
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if (argc == 0) {
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nl("<stdin>", stdin);
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} else {
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if (!(fp = fopen(argv[0], "r")))
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eprintf("fopen %s:", argv[0]);
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nl(argv[0], fp);
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fclose(fp);
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}
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return 0;
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}
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void
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nl(const char *name, FILE *fp)
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{
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char *buf = NULL;
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long n = 0;
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size_t size = 0;
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while (getline(&buf, &size, fp) != -1) {
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if ((mode == 'a')
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|| (mode == 'p' && !regexec(&preg, buf, 0, NULL, 0))
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|| (mode == 't' && buf[0] != '\n'))
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printf("%6ld%s%s", n += incr, sep, buf);
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else
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printf(" %s", buf);
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}
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free(buf);
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if (ferror(fp))
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eprintf("%s: read error:", name);
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}
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