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nl: add -d -p -f -h options

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This commit is contained in:
Quentin Rameau 2015-03-18 17:58:09 +01:00 committed by sin
parent 3111908b03
commit 787d99d896
4 changed files with 104 additions and 20 deletions
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1
LICENSE
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@ -56,3 +56,4 @@ Authors/contributors include:
© 2014 Adria Garriga <rhaps0dy@installgentoo.com>
© 2014 Greg Reagle <greg.reagle@umbc.edu>
© 2015 Tai Chi Minh Ralph Eastwood <tcmreastwood@gmail.com>
© 2015 Quentin Rameau <quinq@quinq.eu.org>

2
README
View File

@ -49,7 +49,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
=*| mktemp non-posix none
=*| mv yes none (-i)
=*| nice yes none
= nl no -d, -f, -h, -p
=* nl yes none
=*| nohup yes none
#*| paste yes none
=*| printenv non-posix none

26
nl.1
View File

@ -1,4 +1,4 @@
.Dd February 20, 2015
.Dd March 18, 2015
.Dt NL 1
.Os sbase
.Sh NAME
@ -6,7 +6,11 @@
.Nd line numbering filter
.Sh SYNOPSIS
.Nm
.Op Fl p
.Op Fl b Ar type
.Op Fl d Ar delim
.Op Fl f Ar type
.Op Fl h Ar type
.Op Fl i Ar incr
.Op Fl l Ar num
.Op Fl n Ar format
@ -25,8 +29,10 @@ is given
reads from stdin.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl p
Do not reset number for logical pages
.It Fl b Ar type
Defines which lines will be numbered:
Defines which lines will be numbered for body sections:
.Bl -tag -width pstringXX
.It a
All lines.
@ -40,6 +46,16 @@ Only lines which match
a regular expression as defined in
.Xr regex 7 .
.El
.It Fl d Ar delim
Specify the two characters delimiter (default is "\\:"). If only one character is specified, the second remains ':'.
.It Fl f Ar type
Same as
.Fl b
except for footer sections.
.It Fl h Ar type
Same as
.Fl b
except for header sections.
.It Fl i Ar incr
Defines the increment between numbered lines.
.It Fl l Ar num
@ -76,3 +92,9 @@ The default is 6.
.El
.Sh SEE ALSO
.Xr pr 1
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2008
specification.

95
nl.c
View File

@ -13,29 +13,64 @@
#define FORMAT_RN "%*ld%s"
#define FORMAT_RZ "%0*ld%s"
static char mode = 't';
static int blines = 1;
static char type[] = { 'n', 't', 'n' }; /* footer, body, header */
static char delim[] = { '\\', ':' };
static const char *format = FORMAT_RN;
static const char *sep = "\t";
static int width = 6;
static int pflag = 0;
static size_t startnum = 1;
static size_t incr = 1;
static regex_t preg;
static size_t blines = 1;
static regex_t preg[3];
static int
getsection(char *buf, int *section)
{
int sectionchanged = 0;
int newsection = *section;
while (!strncmp(buf, delim, 2)) {
if (!sectionchanged) {
sectionchanged = 1;
newsection = 0;
} else {
++newsection;
newsection %= 3;
}
buf += 2;
}
if (buf && buf[0] == '\n')
*section = newsection;
else
sectionchanged = 0;
return sectionchanged;
}
static void
nl(const char *name, FILE *fp)
{
char *buf = NULL;
int donumber, bl = 1;
size_t size = 0;
int donumber, oldsection, section = 1, bl = 1;
size_t number = startnum, size = 0;
while (getline(&buf, &size, fp) != -1) {
donumber = 0;
oldsection = section;
if ((mode == 't' && buf[0] != '\n')
|| (mode == 'p' && !regexec(&preg, buf, 0, NULL, 0))) {
if (getsection(buf, &section)) {
if ((section >= oldsection) && !pflag)
number = startnum;
continue;
}
if ((type[section] == 't' && buf[0] != '\n')
|| (type[section] == 'p' &&
!regexec(&preg[section], buf, 0, NULL, 0))) {
donumber = 1;
} else if (mode == 'a') {
} else if (type[section] == 'a') {
if (buf[0] == '\n' && bl < blines) {
++bl;
} else {
@ -45,8 +80,8 @@ nl(const char *name, FILE *fp)
}
if (donumber) {
printf(format, width, startnum, sep);
startnum += incr;
printf(format, width, number, sep);
number += incr;
} else {
printf("%*s", width, "");
}
@ -60,23 +95,46 @@ nl(const char *name, FILE *fp)
static void
usage(void)
{
eprintf("usage: %s [-b type] [-i incr] [-l num] [-n format] [-s sep] [-v startnum] [-w width] [file]\n", argv0);
eprintf("usage: %s [-p] [-b type] [-d delim] [-f type] "
"[-h type] [-i incr] [-l num]\n[-n format] [-s sep] "
"[-v startnum] [-w width] [file]\n", argv0);
}
static char
getlinetype(char *type, regex_t *preg)
{
if (type[0] == 'p')
eregcomp(preg, &type[1], REG_NOSUB);
else if (!strchr("ant", type[0]))
usage();
return type[0];
}
int
main(int argc, char *argv[])
{
FILE *fp;
char *r;
char *d;
ARGBEGIN {
case 'b':
r = EARGF(usage());
mode = r[0];
if (r[0] == 'p')
eregcomp(&preg, &r[1], REG_NOSUB);
else if (!strchr("ant", mode))
type[1] = getlinetype(EARGF(usage()), &preg[1]);
break;
case 'd':
d = EARGF(usage());
if (strlen(d) > 2) {
usage();
} else if (d[0] != '\0') {
delim[0] = d[0];
if (d[1])
delim[1] = d[1];
}
break;
case 'f':
type[0] = getlinetype(EARGF(usage()), &preg[0]);
break;
case 'h':
type[2] = getlinetype(EARGF(usage()), &preg[2]);
break;
case 'i':
incr = estrtonum(EARGF(usage()), 0, MIN(LLONG_MAX, SIZE_MAX));
@ -95,6 +153,9 @@ main(int argc, char *argv[])
else
eprintf("%s: bad format\n", format);
break;
case 'p':
pflag = 1;
break;
case 's':
sep = EARGF(usage());
break;