Support NUL-containing lines in sort(1)

For sort(1) we need memmem(), which I imported from OpenBSD.
Inside sort(1), the changes involved working with the explicit lengths
given by getlines() earlier and rewriting some of the functions.

Now we can handle NUL-characters in the input just fine.
This commit is contained in:
FRIGN 2016-02-29 00:47:10 +01:00 committed by sin
parent e4810f1cdb
commit eb9bda8787
5 changed files with 176 additions and 84 deletions

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@ -58,6 +58,7 @@ LIBUTILSRC =\
libutil/getlines.c\
libutil/human.c\
libutil/md5.c\
libutil/memmem.c\
libutil/mkdirp.c\
libutil/mode.c\
libutil/parseoffset.c\

2
README
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@ -79,7 +79,7 @@ The following tools are implemented:
0=* x sha512-224sum .
0=* x sha512-256sum .
0=*|o sleep .
#*|o sort .
0#*|o sort .
0=*|o split .
0=*|x sponge .
0#*|o strings .

66
libutil/memmem.c Normal file
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@ -0,0 +1,66 @@
/* $OpenBSD: memmem.c,v 1.4 2015/08/31 02:53:57 guenther Exp $ */
/*
* Copyright (c) 2005 Pascal Gloor <pascal.gloor@spale.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <string.h>
#include "../util.h"
/*
* Find the first occurrence of the byte string s in byte string l.
*/
void *
memmem(const void *l, size_t l_len, const void *s, size_t s_len)
{
const char *cur, *last;
const char *cl = l;
const char *cs = s;
/* a zero length needle should just return the haystack */
if (s_len == 0)
return (void *)cl;
/* "s" must be smaller or equal to "l" */
if (l_len < s_len)
return NULL;
/* special case where s_len == 1 */
if (s_len == 1)
return memchr(l, *cs, l_len);
/* the last position where its possible to find "s" in "l" */
last = cl + l_len - s_len;
for (cur = cl; cur <= last; cur++)
if (cur[0] == cs[0] && memcmp(cur, cs, s_len) == 0)
return (void *)cur;
return NULL;
}

189
sort.c
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@ -33,119 +33,133 @@ static TAILQ_HEAD(kdhead, keydef) kdhead = TAILQ_HEAD_INITIALIZER(kdhead);
static int Cflag = 0, cflag = 0, uflag = 0;
static char *fieldsep = NULL;
static size_t fieldseplen = 0;
static char *col1, *col2;
static size_t col1siz, col2siz;
static struct linebufline col1, col2;
static char *
skipblank(char *s)
static void
skipblank(struct linebufline *a)
{
while (*s == ' ' || *s == '\t')
s++;
return s;
while (a->len && (*(a->data) == ' ' || *(a->data) == '\t')) {
a->data++;
a->len--;
}
}
static char *
skipnonblank(char *s)
static void
skipnonblank(struct linebufline *a)
{
while (*s && *s != '\n' && *s != ' ' && *s != '\t')
s++;
return s;
while (a->len && (*(a->data) != '\n' && *(a->data) != ' ' &&
*(a->data) != '\t')) {
a->data++;
a->len--;
}
}
static char *
skipcolumn(char *s, char *eol, int skip_to_next_col)
static void
skipcolumn(struct linebufline *a, int skip_to_next_col)
{
char *s;
if (fieldsep) {
if ((s = strstr(s, fieldsep))) {
if (skip_to_next_col)
s += fieldseplen;
if ((s = memmem(a->data, a->len, fieldsep, fieldseplen))) {
if (skip_to_next_col) {
a->len = a->len - (s - a->data);
a->data = s;
}
} else {
s = eol;
a->data += a->len - 1;
a->len = 1;
}
} else {
s = skipblank(s);
s = skipnonblank(s);
skipblank(a);
skipnonblank(a);
}
return s;
}
static size_t
columns(char *line, const struct keydef *kd, char **col, size_t *colsiz)
columns(struct linebufline *line, const struct keydef *kd, struct linebufline *col)
{
Rune r;
char *start, *end, *eol = strchr(line, '\n');
struct linebufline start, end;
size_t len, utflen, rlen;
int i;
for (i = 1, start = line; i < kd->start_column; i++)
start = skipcolumn(start, eol, 1);
start.data = line->data;
start.len = line->len;
for (i = 1; i < kd->start_column; i++)
skipcolumn(&start, 1);
if (kd->flags & MOD_STARTB)
start = skipblank(start);
for (utflen = 0; start < eol && utflen < kd->start_char - 1;) {
rlen = chartorune(&r, start);
start += rlen;
skipblank(&start);
for (utflen = 0; start.len > 1 && utflen < kd->start_char - 1;) {
rlen = chartorune(&r, start.data);
start.data += rlen;
start.len -= rlen;
utflen++;
}
end.data = line->data;
end.len = line->len;
if (kd->end_column) {
for (i = 1, end = line; i < kd->end_column; i++)
end = skipcolumn(end, eol, 1);
for (i = 1; i < kd->end_column; i++)
skipcolumn(&end, 1);
if (kd->flags & MOD_ENDB)
end = skipblank(end);
skipblank(&end);
if (kd->end_char) {
for (utflen = 0; end < eol && utflen < kd->end_char;) {
rlen = chartorune(&r, end);
end += rlen;
for (utflen = 0; end.len > 1 && utflen < kd->end_char;) {
rlen = chartorune(&r, end.data);
end.data += rlen;
end.len -= rlen;
utflen++;
}
} else {
end = skipcolumn(end, eol, 0);
skipcolumn(&end, 0);
}
printf("end.data = '%s'\n", end.data);
} else {
end = eol;
end.data += end.len - 1;
end.len = 1;
}
len = (start > end) ? 0 : (end - start);
if (!*col || *colsiz < len)
*col = erealloc(*col, len + 1);
memcpy(*col, start, len);
(*col)[len] = '\0';
if (*colsiz < len)
*colsiz = len;
len = MAX(0, end.data - start.data);
if (!(col->data) || col->len < len)
col->data = erealloc(col->data, len + 1);
memcpy(col->data, start.data, len);
col->data[len] = '\0';
if (col->len < len)
col->len = len;
return len;
}
static int
skipmodcmp(const char *s1, const char *s2, int flags)
skipmodcmp(struct linebufline *a, struct linebufline *b, int flags)
{
Rune r1, r2;
size_t offa = 0, offb = 0;
do {
s1 += chartorune(&r1, s1);
s2 += chartorune(&r2, s2);
offa += chartorune(&r1, a->data + offa);
offb += chartorune(&r2, b->data + offb);
if (flags & MOD_D && flags & MOD_I) {
while (*s1 && ((!isblankrune(r1) && !isalnumrune(r1)) ||
(!isprintrune(r1))))
s1 += chartorune(&r1, s1);
while (*s2 && ((!isblankrune(r2) && !isalnumrune(r2)) ||
(!isprintrune(r2))))
s2 += chartorune(&r2, s2);
while (offa < a->len && ((!isblankrune(r1) &&
!isalnumrune(r1)) || (!isprintrune(r1))))
offa += chartorune(&r1, a->data + offa);
while (offb < b->len && ((!isblankrune(r2) &&
!isalnumrune(r2)) || (!isprintrune(r2))))
offb += chartorune(&r2, b->data + offb);
}
else if (flags & MOD_D) {
while (*s1 && !isblankrune(r1) && !isalnumrune(r1))
s1 += chartorune(&r1, s1);
while (*s2 && !isblankrune(r2) && !isalnumrune(r2))
s2 += chartorune(&r2, s2);
while (offa < a->len && !isblankrune(r1) &&
!isalnumrune(r1))
offa += chartorune(&r1, a->data + offa);
while (offb < b->len && !isblankrune(r2) &&
!isalnumrune(r2))
offb += chartorune(&r2, b->data + offb);
}
else if (flags & MOD_I) {
while (*s1 && !isprintrune(r1))
s1 += chartorune(&r1, s1);
while (*s2 && !isprintrune(r2))
s2 += chartorune(&r2, s2);
while (offa < a->len && !isprintrune(r1))
offa += chartorune(&r1, a->data + offa);
while (offb < b->len && !isprintrune(r2))
offb += chartorune(&r2, b->data + offb);
}
if (flags & MOD_F) {
r1 = toupperrune(r1);
@ -157,15 +171,15 @@ skipmodcmp(const char *s1, const char *s2, int flags)
}
static int
linecmp(const char **a, const char **b)
linecmp(struct linebufline *a, struct linebufline *b)
{
int res = 0;
long double x, y;
struct keydef *kd;
TAILQ_FOREACH(kd, &kdhead, entry) {
columns((char *)*a, kd, &col1, &col1siz);
columns((char *)*b, kd, &col2, &col2siz);
columns(a, kd, &col1);
columns(b, kd, &col2);
/* if -u is given, don't use default key definition
* unless it is the only one */
@ -173,13 +187,17 @@ linecmp(const char **a, const char **b)
TAILQ_LAST(&kdhead, kdhead) != TAILQ_FIRST(&kdhead)) {
res = 0;
} else if (kd->flags & MOD_N) {
x = strtold(col1, NULL);
y = strtold(col2, NULL);
x = strtold(col1.data, NULL);
y = strtold(col2.data, NULL);
res = (x < y) ? -1 : (x > y);
} else if (kd->flags & (MOD_D | MOD_F | MOD_I)) {
res = skipmodcmp(col1, col2, kd->flags);
res = skipmodcmp(&col1, &col2, kd->flags);
} else {
res = strcmp(col1, col2);
if (!(res = memcmp(col1.data, col2.data,
MIN(col1.len, col2.len)))) {
res += col1.data[MIN(col1.len, col2.len)] -
col2.data[MIN(col1.len, col2.len)];
}
}
if (kd->flags & MOD_R)
@ -194,20 +212,25 @@ linecmp(const char **a, const char **b)
static int
check(FILE *fp, const char *fname)
{
static struct { char *buf; size_t size; } prev, cur, tmp;
static struct linebufline prev, cur, tmp;
static size_t prevsize, cursize, tmpsize;
if (!prev.buf && getline(&prev.buf, &prev.size, fp) < 0)
if (!prev.data && (prev.len = getline(&prev.data, &prevsize, fp)) < 0)
eprintf("getline:");
while (getline(&cur.buf, &cur.size, fp) > 0) {
if (uflag > linecmp((const char **)&cur.buf,
(const char **)&prev.buf)) {
if (!Cflag)
weprintf("disorder %s: %s", fname, cur.buf);
while ((cur.len = getline(&cur.data, &cursize, fp)) > 0) {
if (uflag > linecmp(&cur, &prev)) {
if (!Cflag) {
weprintf("disorder %s: ", fname);
fwrite(cur.data, 1, cur.len, stderr);
}
return 1;
}
tmp = cur;
tmpsize = cursize;
cur = prev;
cursize = prevsize;
prev = tmp;
prevsize = tmpsize;
}
return 0;
@ -345,7 +368,7 @@ main(int argc, char *argv[])
break;
case 't':
fieldsep = EARGF(usage());
fieldseplen = strlen(fieldsep);
fieldseplen = unescape(fieldsep);
break;
case 'u':
uflag = 1;
@ -388,14 +411,14 @@ main(int argc, char *argv[])
if (outfile && !(ofp = fopen(outfile, "w")))
eprintf("fopen %s:", outfile);
qsort(linebuf.lines, linebuf.nlines, sizeof *linebuf.lines,
qsort(linebuf.lines, linebuf.nlines, sizeof(*linebuf.lines),
(int (*)(const void *, const void *))linecmp);
for (i = 0; i < linebuf.nlines; i++) {
if (!uflag || i == 0 ||
linecmp((const char **)&linebuf.lines[i],
(const char **)&linebuf.lines[i - 1])) {
fputs(linebuf.lines[i], ofp);
linecmp(&linebuf.lines[i], &linebuf.lines[i - 1])) {
fwrite(linebuf.lines[i].data, 1,
linebuf.lines[i].len, ofp);
}
}
}

2
util.h
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@ -76,3 +76,5 @@ long long enstrtonum(int, const char *, long long, long long);
long long estrtonum(const char *, long long, long long);
size_t unescape(char *);
int mkdirp(const char *);
#undef memmem
void *memmem(const void *, size_t, const void *, size_t);