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Implement nl -v startnum

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This commit is contained in:
sin
2015-02-20 12:05:54 +00:00
parent 028b0c206f
commit 13e4231f4c
3 changed files with 18 additions and 7 deletions
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16
nl.c
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@@ -9,6 +9,7 @@
static char mode = 't';
static const char *sep = "\t";
static size_t startnum = 1;
static size_t incr = 1;
static regex_t preg;
@@ -16,15 +17,17 @@ void
nl(const char *name, FILE *fp)
{
char *buf = NULL;
size_t n = 0, size = 0;
size_t size = 0;
while (getline(&buf, &size, fp) != -1) {
if ((mode == 'a')
|| (mode == 'p' && !regexec(&preg, buf, 0, NULL, 0))
|| (mode == 't' && buf[0] != '\n'))
printf("%6ld%s%s", n += incr, sep, buf);
else
|| (mode == 't' && buf[0] != '\n')) {
printf("%6ld%s%s", startnum, sep, buf);
startnum += incr;
} else {
printf(" %s", buf);
}
}
free(buf);
if (ferror(fp))
@@ -34,7 +37,7 @@ nl(const char *name, FILE *fp)
static void
usage(void)
{
eprintf("usage: %s [-b type] [-i incr] [-s sep] [file]\n", argv0);
eprintf("usage: %s [-b type] [-i incr] [-s sep] [-v startnum] [file]\n", argv0);
}
int
@@ -58,6 +61,9 @@ main(int argc, char *argv[])
case 's':
sep = EARGF(usage());
break;
case 'v':
startnum = estrtonum(EARGF(usage()), 0, MIN(LLONG_MAX, SIZE_MAX));
break;
default:
usage();
} ARGEND;