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Implement nl -w width

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This commit is contained in:
sin
2015-02-20 12:15:43 +00:00
parent 13e4231f4c
commit 9de3546082
3 changed files with 13 additions and 3 deletions
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8
nl.c
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@@ -9,6 +9,7 @@
static char mode = 't';
static const char *sep = "\t";
static int width = 6;
static size_t startnum = 1;
static size_t incr = 1;
static regex_t preg;
@@ -23,7 +24,7 @@ nl(const char *name, FILE *fp)
if ((mode == 'a')
|| (mode == 'p' && !regexec(&preg, buf, 0, NULL, 0))
|| (mode == 't' && buf[0] != '\n')) {
printf("%6ld%s%s", startnum, sep, buf);
printf("%*ld%s%s", width, startnum, sep, buf);
startnum += incr;
} else {
printf(" %s", buf);
@@ -37,7 +38,7 @@ nl(const char *name, FILE *fp)
static void
usage(void)
{
eprintf("usage: %s [-b type] [-i incr] [-s sep] [-v startnum] [file]\n", argv0);
eprintf("usage: %s [-b type] [-i incr] [-s sep] [-v startnum] [-w width] [file]\n", argv0);
}
int
@@ -64,6 +65,9 @@ main(int argc, char *argv[])
case 'v':
startnum = estrtonum(EARGF(usage()), 0, MIN(LLONG_MAX, SIZE_MAX));
break;
case 'w':
width = estrtonum(EARGF(usage()), 1, INT_MAX);
break;
default:
usage();
} ARGEND;