Hi all,
I often find myself piping data through ... | awk '{print length}' | ...
I figured there should be a more direct way that requires less typing.
Perhaps other developers have a similar itch?
The FreeBSD, NetBSD, Dragonfly, and GNU variants of the wc(1) utility
have a similar -L feature.
Kind regards,
Job
Index: wc.1
===================================================================
RCS file: /cvs/src/usr.bin/wc/wc.1,v
retrieving revision 1.27
diff -u -p -r1.27 wc.1
--- wc.1 24 Oct 2016 13:46:58 -0000 1.27
+++ wc.1 21 Sep 2022 15:47:29 -0000
@@ -41,7 +41,7 @@
.Sh SYNOPSIS
.Nm wc
.Op Fl c | m
-.Op Fl hlw
+.Op Fl hLlw
.Op Ar
.Sh DESCRIPTION
The
@@ -68,6 +68,14 @@ is written to the standard output.
Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte,
Petabyte, and Exabyte in order to reduce the number of digits to four or fewer
using powers of 2 for sizes (K=1024, M=1048576, etc.).
+.It Fl L
+Write the length of the longest line to the standard output.
+Length is the number of bytes counted, or the number of characters if the
+.Fl m
+flag is specified.
+If more than one input file is specified,
+the length of the longest line of all files is reported as the value of
+.Qq total .
.It Fl l
The number of lines in each input file
is written to the standard output.
@@ -128,9 +136,9 @@ utility is compliant with the
.St -p1003.1-2008
specification.
.Pp
-The flag
-.Op Fl h
-is an extension to that specification.
+The flags
+.Op Fl Lh
+are extensions to that specification.
.Sh HISTORY
A
.Nm
Index: wc.c
===================================================================
RCS file: /cvs/src/usr.bin/wc/wc.c,v
retrieving revision 1.30
diff -u -p -r1.30 wc.c
--- wc.c 2 Sep 2022 15:21:40 -0000 1.30
+++ wc.c 21 Sep 2022 15:47:29 -0000
@@ -44,12 +44,12 @@
#define _MAXBSIZE (64 * 1024)
-int64_t tlinect, twordct, tcharct;
-int doline, doword, dochar, humanchar, multibyte;
+int64_t tlinect, twordct, tcharct, tlongest;
+int doline, doword, dochar, dolongest, humanchar, multibyte;
int rval;
extern char *__progname;
-static void print_counts(int64_t, int64_t, int64_t, const char *);
+static void print_counts(int64_t, int64_t, int64_t, int64_t, const char *);
static void format_and_print(int64_t);
static void cnt(const char *);
@@ -63,8 +63,11 @@ main(int argc, char *argv[])
if (pledge("stdio rpath", NULL) == -1)
err(1, "pledge");
- while ((ch = getopt(argc, argv, "lwchm")) != -1)
+ while ((ch = getopt(argc, argv, "Llwchm")) != -1)
switch(ch) {
+ case 'L':
+ dolongest = 1;
+ break;
case 'l':
doline = 1;
break;
@@ -84,7 +87,7 @@ main(int argc, char *argv[])
case '?':
default:
fprintf(stderr,
- "usage: %s [-c | -m] [-hlw] [file ...]\n",
+ "usage: %s [-c | -m] [-hLlw] [file ...]\n",
__progname);
return 1;
}
@@ -96,7 +99,7 @@ main(int argc, char *argv[])
* if you don't get any arguments, you have to turn them
* all on.
*/
- if (!doline && !doword && !dochar)
+ if (!doline && !doword && !dochar && !dolongest)
doline = doword = dochar = 1;
if (!*argv) {
@@ -109,7 +112,8 @@ main(int argc, char *argv[])
} while(*++argv);
if (dototal)
- print_counts(tlinect, twordct, tcharct, "total");
+ print_counts(tlinect, twordct, tcharct, tlongest,
+ "total");
}
return rval;
@@ -127,11 +131,11 @@ cnt(const char *path)
wchar_t wc;
short gotsp;
ssize_t len;
- int64_t linect, wordct, charct;
+ uint64_t linect, wordct, charct, longct, tmpll;
struct stat sbuf;
int fd;
- linect = wordct = charct = 0;
+ linect = wordct = charct = longct = tmpll = 0;
stream = NULL;
if (path != NULL) {
file = path;
@@ -180,12 +184,19 @@ cnt(const char *path)
* faster to get lines than to get words, since
* the word count requires some logic.
*/
- else if (doline) {
+ else if (doline || dolongest) {
while ((len = read(fd, buf, _MAXBSIZE)) > 0) {
charct += len;
- for (C = buf; len--; ++C)
- if (*C == '\n')
+ for (C = buf; len--; ++C) {
+ if (*C == '\n') {
+ if (tmpll > longct)
+ longct = tmpll;
+ tmpll = 0;
++linect;
+ } else {
+ ++tmpll;
+ }
+ }
}
if (len == -1) {
warn("%s", file);
@@ -243,10 +254,16 @@ cnt(const char *path)
wc = L'?';
} else if (len == 0)
len = 1;
+ if (wc != L'\n')
+ ++tmpll;
if (iswspace(wc)) {
gotsp = 1;
- if (wc == L'\n')
+ if (wc == L'\n') {
+ if (tmpll > longct)
+ longct = tmpll;
+ tmpll = 0;
++linect;
+ }
} else if (gotsp) {
gotsp = 0;
++wordct;
@@ -259,7 +276,7 @@ cnt(const char *path)
}
}
- print_counts(linect, wordct, charct, path);
+ print_counts(linect, wordct, charct, longct, path);
/*
* Don't bother checking doline, doword, or dochar -- speeds
@@ -268,6 +285,8 @@ cnt(const char *path)
tlinect += linect;
twordct += wordct;
tcharct += charct;
+ if (dolongest && longct > tlongest)
+ tlongest = longct;
if ((stream == NULL ? close(fd) : fclose(stream)) != 0) {
warn("%s", file);
@@ -289,7 +308,8 @@ format_and_print(int64_t v)
}
static void
-print_counts(int64_t lines, int64_t words, int64_t chars, const char *name)
+print_counts(int64_t lines, int64_t words, int64_t chars, int64_t longest,
+ const char *name)
{
if (doline)
format_and_print(lines);
@@ -297,6 +317,8 @@ print_counts(int64_t lines, int64_t word
format_and_print(words);
if (dochar)
format_and_print(chars);
+ if (dolongest)
+ format_and_print(longest);
if (name)
printf(" %s\n", name);
