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Add 'w' flag to:

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Use whitespace (spaces and tabs) as the delimiter.
Consecutive spaces and tabs count as one single field
separator.

Reviewed by:	swildner@dragonflybsd.org
Approved by:	cperciva
Obtained from:	DragonFlyBSD
MFC after:	1 week
This commit is contained in:
Eitan Adler 2012-11-20 01:57:21 +00:00
parent f77a2d2f24
commit 18ba28c82c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=243320
2 changed files with 35 additions and 10 deletions
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7
usr.bin/cut/cut.1
View File

@ -31,7 +31,7 @@
.\" @(#)cut.1 8.1 (Berkeley) 6/6/93
.\" $FreeBSD$
.\"
.Dd December 21, 2006
.Dd August 8, 2012
.Dt CUT 1
.Os
.Sh NAME
@ -47,7 +47,7 @@
.Op Ar
.Nm
.Fl f Ar list
.Op Fl d Ar delim
.Op Fl w | Fl d Ar delim
.Op Fl s
.Op Ar
.Sh DESCRIPTION
@ -119,6 +119,9 @@ that form the character are selected.
.It Fl s
Suppress lines with no field delimiter characters.
Unless specified, lines with no delimiters are passed through unmodified.
.It Fl w
Use whitespace (spaces and tabs) as the delimiter.
Consecutive spaces and tabs count as one single field separator.
.El
.Sh ENVIRONMENT
The

38
usr.bin/cut/cut.c
View File

@ -58,6 +58,7 @@ static int dflag;
static int fflag;
static int nflag;
static int sflag;
static int wflag;
static size_t autostart, autostop, maxval;
static char * positions;
@ -67,6 +68,7 @@ static int b_n_cut(FILE *, const char *);
static int c_cut(FILE *, const char *);
static int f_cut(FILE *, const char *);
static void get_list(char *);
static int is_delim(int);
static void needpos(size_t);
static void usage(void);
@ -84,7 +86,7 @@ main(int argc, char *argv[])
dchar = '\t'; /* default delimiter is \t */
strcpy(dcharmb, "\t");
while ((ch = getopt(argc, argv, "b:c:d:f:sn")) != -1)
while ((ch = getopt(argc, argv, "b:c:d:f:snw")) != -1)
switch(ch) {
case 'b':
get_list(optarg);
@ -111,6 +113,9 @@ main(int argc, char *argv[])
case 'n':
nflag = 1;
break;
case 'w':
wflag = 1;
break;
case '?':
default:
usage();
@ -119,9 +124,9 @@ main(int argc, char *argv[])
argv += optind;
if (fflag) {
if (bflag || cflag || nflag)
if (bflag || cflag || nflag || (wflag && dflag))
usage();
} else if (!(bflag || cflag) || dflag || sflag)
} else if (!(bflag || cflag) || dflag || sflag || wflag)
usage();
else if (!bflag && nflag)
usage();
@ -358,19 +363,31 @@ c_cut(FILE *fp, const char *fname)
return (0);
}
static int
is_delim(int ch)
{
if (wflag) {
if (ch == ' ' || ch == '\t')
return 1;
} else {
if (ch == dchar)
return 1;
}
return 0;
}
static int
f_cut(FILE *fp, const char *fname)
{
wchar_t ch;
int field, i, isdelim;
char *pos, *p;
wchar_t sep;
int output;
char *lbuf, *mlbuf;
size_t clen, lbuflen, reallen;
mlbuf = NULL;
for (sep = dchar; (lbuf = fgetln(fp, &lbuflen)) != NULL;) {
while ((lbuf = fgetln(fp, &lbuflen)) != NULL) {
reallen = lbuflen;
/* Assert EOL has a newline. */
if (*(lbuf + lbuflen - 1) != '\n') {
@ -394,7 +411,7 @@ f_cut(FILE *fp, const char *fname)
if (clen == 0)
clen = 1;
/* this should work if newline is delimiter */
if (ch == sep)
if (is_delim(ch))
isdelim = 1;
if (ch == '\n') {
if (!isdelim && !sflag)
@ -421,8 +438,13 @@ f_cut(FILE *fp, const char *fname)
if (clen == 0)
clen = 1;
p += clen;
if (ch == '\n' || ch == sep)
if (ch == '\n' || is_delim(ch)) {
/* compress whitespace */
if (wflag && ch != '\n')
while (is_delim(*p))
p++;
break;
}
if (*pos)
for (i = 0; i < (int)clen; i++)
putchar(p[i - clen]);
@ -452,6 +474,6 @@ usage(void)
(void)fprintf(stderr, "%s\n%s\n%s\n",
"usage: cut -b list [-n] [file ...]",
" cut -c list [file ...]",
" cut -f list [-s] [-d delim] [file ...]");
" cut -f list [-s] [-w | -d delim] [file ...]");
exit(1);
}