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Add UTF-8-delimiter-support to cut(1) 

Now you can specify a multibyte-delimiter to cut, which should
definitely be possible for the end-user (Fuck POSIX).
Looking at GNU/coreutils' cut(1)[0], which basically ignores the difference
between characters and bytes, the -n-option and which is bloated as hell,
one has to wonder why they are still default. This is insane!
Things like this personally keep me motivated to make sbase better
every day.

[0]: http://git.savannah.gnu.org/gitweb/?p=coreutils.git;a=blob;f=src/cut.c;hb=HEAD
     NSFW! You have been warned.
This commit is contained in:
FRIGN 2015-01-22 12:32:50 +01:00
parent dc70eb7976
commit 733b33f1c7
3 changed files with 40 additions and 18 deletions
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2
README
View File

@ -22,7 +22,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
=* comm yes none
= cp no -H, -i, -L
=* cron non-posix none
* cut yes none
#* cut yes none
= date yes none
= dirname yes none
= du no -H, -L, -x

4
cut.1
View File

@ -1,4 +1,4 @@
.Dd January 18, 2015
.Dd January 22, 2015
.Dt CUT 1 sbase\-VERSION
.Sh NAME
.Nm cut
@ -67,4 +67,4 @@ utility is compliant with the
specification.
.Pp
The possibility of separating numbers and ranges with a space
is an extension to that specification.
and specifying multibyte delimiters is an extension to that specification.

52
cut.c
View File

@ -4,6 +4,7 @@
#include <string.h>
#include "text.h"
#include "utf.h"
#include "util.h"
typedef struct Range {
@ -11,11 +12,12 @@ typedef struct Range {
struct Range *next;
} Range;
static Range *list = NULL;
static char mode = 0;
static char delim = '\t';
static int nflag = 0;
static int sflag = 0;
static Range *list = NULL;
static char mode = 0;
static Rune delim = '\t';
static size_t delimlen = 1;
static int nflag = 0;
static int sflag = 0;
static void
insert(Range *r)
@ -70,10 +72,11 @@ static size_t
seek(const char *s, size_t pos, size_t *prev, size_t count)
{
const char *t;
size_t n = pos - *prev;
size_t n = pos - *prev, i;
Rune r;
if (mode == 'b') {
if ((t = memchr(s, 0, n)))
if ((t = memchr(s, '\0', n)))
return t - s;
if (nflag)
while (n && !UTF8_POINT(s[n]))
@ -85,11 +88,18 @@ seek(const char *s, size_t pos, size_t *prev, size_t count)
if (UTF8_POINT(*t) && !--n)
break;
} else {
for (t = (count < 2) ? s : s + 1; n && *t; t++)
if (*t == delim && !--n && count)
for (t = (count < delimlen + 1) ? s : s + delimlen; n && *t; ) {
for (i = 1; t[i]; i++)
if (fullrune(t, i))
break;
charntorune(&r, t, i);
if (r == delim && !--n && count)
break;
t += i;
}
}
*prev = pos;
return t - s;
}
@ -106,20 +116,22 @@ cut(FILE *fp)
while ((len = getline(&buf, &size, fp)) != -1) {
if (len && buf[len - 1] == '\n')
buf[len - 1] = '\0';
if (mode == 'f' && !strchr(buf, delim)) {
if (mode == 'f' && !utfrune(buf, delim)) {
if (!sflag)
puts(buf);
continue;
}
for (i = 0, p = 1, s = buf, r = list; r; r = r->next, s += n) {
s += seek(s, r->min, &p, i++);
s += seek(s, r->min, &p, i);
i += (mode == 'f') ? delimlen : 1;
if (!*s)
break;
if (!r->max) {
fputs(s, stdout);
break;
}
n = seek(s, r->max + 1, &p, i++);
n = seek(s, r->max + 1, &p, i);
i += (mode == 'f') ? delimlen : 1;
if (fwrite(s, 1, n, stdout) != n)
eprintf("write error:");
}
@ -139,16 +151,27 @@ int
main(int argc, char *argv[])
{
FILE *fp;
int i;
char *m, *d;
ARGBEGIN {
case 'b':
case 'c':
case 'f':
mode = ARGC();
parselist(ARGF());
m = ARGF();
if (!m)
usage();
parselist(m);
break;
case 'd':
delim = *ARGF();
if(!(d = ARGF()))
usage();
for (i = 1; i <= strlen(d); i++)
if (fullrune(d, i))
break;
charntorune(&delim, d, i);
delimlen = i;
break;
case 'n':
nflag = 1;
@ -162,7 +185,6 @@ main(int argc, char *argv[])
if (!mode)
usage();
if (!argc)
cut(stdin);
else for (; argc--; argv++) {