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Support NUL containing lines in uniq(1)

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FRIGN 2016-03-10 07:02:04 +01:00 committed by sin
parent b58884312c
commit e537186ba4
2 changed files with 39 additions and 35 deletions
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2
README
View File

@ -97,7 +97,7 @@ The following tools are implemented:
0=*|o tty .
0=*|o uname .
0#*|o unexpand .
=*|o uniq .
0=*|o uniq .
0=*|o unlink .
0=*|o uudecode .
0=*|o uuencode .

72
uniq.c
View File

@ -4,6 +4,7 @@
#include <stdlib.h>
#include <string.h>
#include "text.h"
#include "util.h"
static const char *countfmt = "";
@ -12,59 +13,60 @@ static int uflag = 0;
static int fskip = 0;
static int sskip = 0;
static char *prevline = NULL;
static char *prevoffset = NULL;
static struct line prevl;
static ssize_t prevoff = -1;
static long prevlinecount = 0;
static size_t prevlinesiz = 0;
static const char *
uniqskip(const char *l)
static size_t
uniqskip(struct line *l)
{
const char *lo = l;
size_t i;
int f = fskip, s = sskip;
for (; f; --f) {
while (isblank(*lo))
lo++;
while (*lo && !isblank(*lo))
lo++;
for (i = 0; i < l->len && f; --f) {
while (isblank(l->data[i]))
i++;
while (i < l->len && !isblank(l->data[i]))
i++;
}
for (; s && *lo && *lo != '\n'; --s, ++lo);
for (; s && i < l->len && l->data[i] != '\n'; --s, i++)
;
return lo;
return i;
}
static void
uniqline(FILE *ofp, const char *l, size_t len)
uniqline(FILE *ofp, struct line *l)
{
const char *loffset = l ? uniqskip(l) : l;
size_t loff;
int linesequel = l && prevoffset &&
!strcmp(loffset, prevoffset);
if (l) {
loff = uniqskip(l);
if (linesequel) {
++prevlinecount;
return;
if (prevoff >= 0 && (l->len - loff) == (prevl.len - prevoff) &&
!memcmp(l->data + loff, prevl.data + prevoff, l->len - loff)) {
++prevlinecount;
return;
}
}
if (prevoffset) {
if (prevoff >= 0) {
if ((prevlinecount == 1 && !dflag) ||
(prevlinecount != 1 && !uflag)) {
if (*countfmt)
fprintf(ofp, countfmt, prevlinecount);
fputs(prevline, ofp);
fwrite(prevl.data, 1, prevl.len, ofp);
}
prevoffset = NULL;
prevoff = -1;
}
if (l) {
if (!prevline || len >= prevlinesiz) {
prevlinesiz = len + 1;
prevline = erealloc(prevline, prevlinesiz);
if (!prevl.data || l->len >= prevl.len) {
prevl.len = l->len;
prevl.data = erealloc(prevl.data, prevl.len);
}
memcpy(prevline, l, len);
prevline[len] = '\0';
prevoffset = prevline + (loffset - l);
memcpy(prevl.data, l->data, prevl.len);
prevoff = loff;
}
prevlinecount = 1;
}
@ -72,18 +74,20 @@ uniqline(FILE *ofp, const char *l, size_t len)
static void
uniq(FILE *fp, FILE *ofp)
{
char *buf = NULL;
size_t size = 0;
static struct line line;
static size_t size;
ssize_t len;
while ((len = getline(&buf, &size, fp)) > 0)
uniqline(ofp, buf, (size_t)len);
while ((len = getline(&line.data, &size, fp)) > 0) {
line.len = len;
uniqline(ofp, &line);
}
}
static void
uniqfinish(FILE *ofp)
{
uniqline(ofp, NULL, 0);
uniqline(ofp, NULL);
}
static void