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src/usr.bin/sort/bwstring.c

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/* $OpenBSD: bwstring.c,v 1.10 2024/09/20 02:00:46 jsg Exp $ */
/*-
* Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
* Copyright (C) 2012 Oleg Moskalenko <mom040267@gmail.com>
* All rights reserved.
*
* 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.
*
* 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 <ctype.h>
#include <errno.h>
#include <err.h>
#include <langinfo.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include "bwstring.h"
#include "sort.h"
static wchar_t **wmonths;
static char **cmonths;
/* initialise months */
void
initialise_months(void)
{
const nl_item item[12] = { ABMON_1, ABMON_2, ABMON_3, ABMON_4,
ABMON_5, ABMON_6, ABMON_7, ABMON_8, ABMON_9, ABMON_10,
ABMON_11, ABMON_12 };
char *tmp;
size_t len;
if (sort_mb_cur_max == 1) {
if (cmonths == NULL) {
char *m;
unsigned int j;
int i;
cmonths = sort_malloc(sizeof(char *) * 12);
for (i = 0; i < 12; i++) {
cmonths[i] = NULL;
tmp = nl_langinfo(item[i]);
if (debug_sort)
printf("month[%d]=%s\n", i, tmp);
if (*tmp == '\0')
continue;
m = sort_strdup(tmp);
len = strlen(tmp);
for (j = 0; j < len; j++)
m[j] = toupper(m[j]);
cmonths[i] = m;
}
}
} else {
if (wmonths == NULL) {
unsigned int j;
wchar_t *m;
int i;
wmonths = sort_malloc(sizeof(wchar_t *) * 12);
for (i = 0; i < 12; i++) {
wmonths[i] = NULL;
tmp = nl_langinfo(item[i]);
if (debug_sort)
printf("month[%d]=%s\n", i, tmp);
if (*tmp == '\0')
continue;
len = strlen(tmp);
m = sort_reallocarray(NULL, len + 1,
sizeof(wchar_t));
if (mbstowcs(m, tmp, len) == (size_t)-1) {
sort_free(m);
continue;
}
m[len] = L'\0';
for (j = 0; j < len; j++)
m[j] = towupper(m[j]);
wmonths[i] = m;
}
}
}
}
/*
* Compare two wide-character strings
*/
static int
wide_str_coll(const wchar_t *s1, const wchar_t *s2)
{
int ret = 0;
errno = 0;
ret = wcscoll(s1, s2);
if (errno == EILSEQ) {
errno = 0;
ret = wcscmp(s1, s2);
if (errno != 0) {
size_t i;
for (i = 0; ; ++i) {
wchar_t c1 = s1[i];
wchar_t c2 = s2[i];
if (c1 == L'\0')
return (c2 == L'\0') ? 0 : -1;
if (c2 == L'\0')
return 1;
if (c1 == c2)
continue;
return (int)c1 - (int)c2;
}
}
}
return ret;
}
/* counterparts of wcs functions */
void
bwsprintf(FILE *f, struct bwstring *bws, const char *prefix, const char *suffix)
{
if (sort_mb_cur_max == 1)
fprintf(f, "%s%s%s", prefix, bws->data.cstr, suffix);
else
fprintf(f, "%s%S%s", prefix, bws->data.wstr, suffix);
}
const void *
bwsrawdata(const struct bwstring *bws)
{
return &(bws->data);
}
size_t
bwsrawlen(const struct bwstring *bws)
{
return (sort_mb_cur_max == 1) ? bws->len : SIZEOF_WCHAR_STRING(bws->len);
}
size_t
bws_memsize(const struct bwstring *bws)
{
return (sort_mb_cur_max == 1) ? (bws->len + 2 + sizeof(struct bwstring)) :
(SIZEOF_WCHAR_STRING(bws->len + 1) + sizeof(struct bwstring));
}
void
bws_setlen(struct bwstring *bws, size_t newlen)
{
if (bws && newlen != bws->len && newlen <= bws->len) {
bws->len = newlen;
if (sort_mb_cur_max == 1)
bws->data.cstr[newlen] = '\0';
else
bws->data.wstr[newlen] = L'\0';
}
}
/*
* Allocate a new binary string of specified size
*/
struct bwstring *
bwsalloc(size_t sz)
{
struct bwstring *ret;
if (sort_mb_cur_max == 1) {
ret = sort_malloc(sizeof(struct bwstring) + 1 + sz);
ret->data.cstr[sz] = '\0';
} else {
ret = sort_malloc(sizeof(struct bwstring) +
SIZEOF_WCHAR_STRING(sz + 1));
ret->data.wstr[sz] = L'\0';
}
ret->len = sz;
return ret;
}
/*
* Create a copy of binary string.
* New string size equals the length of the old string.
*/
struct bwstring *
bwsdup(const struct bwstring *s)
{
struct bwstring *ret;
if (s == NULL)
return NULL;
ret = bwsalloc(s->len);
if (sort_mb_cur_max == 1)
memcpy(ret->data.cstr, s->data.cstr, s->len);
else
memcpy(ret->data.wstr, s->data.wstr,
SIZEOF_WCHAR_STRING(s->len));
return ret;
}
/*
* Create a new binary string from a wide character buffer.
*/
struct bwstring *
bwssbdup(const wchar_t *str, size_t len)
{
if (str == NULL)
return (len == 0) ? bwsalloc(0) : NULL;
else {
struct bwstring *ret;
size_t i;
ret = bwsalloc(len);
if (sort_mb_cur_max == 1)
for (i = 0; i < len; ++i)
ret->data.cstr[i] = (unsigned char) str[i];
else
memcpy(ret->data.wstr, str, SIZEOF_WCHAR_STRING(len));
return ret;
}
}
/*
* Create a new binary string from a raw binary buffer.
*/
struct bwstring *
bwscsbdup(const unsigned char *str, size_t len)
{
struct bwstring *ret;
ret = bwsalloc(len);
if (str) {
if (sort_mb_cur_max == 1)
memcpy(ret->data.cstr, str, len);
else {
mbstate_t mbs;
const char *s;
size_t charlen, chars, cptr;
chars = 0;
cptr = 0;
s = (const char *) str;
memset(&mbs, 0, sizeof(mbs));
while (cptr < len) {
size_t n = sort_mb_cur_max;
if (n > len - cptr)
n = len - cptr;
charlen = mbrlen(s + cptr, n, &mbs);
switch (charlen) {
case 0:
/* FALLTHROUGH */
case (size_t) -1:
/* FALLTHROUGH */
case (size_t) -2:
ret->data.wstr[chars++] =
(unsigned char) s[cptr];
++cptr;
break;
default:
n = mbrtowc(ret->data.wstr + (chars++),
s + cptr, charlen, &mbs);
if ((n == (size_t)-1) || (n == (size_t)-2))
/* NOTREACHED */
err(2, "mbrtowc error");
cptr += charlen;
}
}
ret->len = chars;
ret->data.wstr[ret->len] = L'\0';
}
}
return ret;
}
/*
* De-allocate object memory
*/
void
bwsfree(struct bwstring *s)
{
sort_free(s);
}
/*
* Copy content of src binary string to dst.
* If the capacity of the dst string is not sufficient,
* then the data is truncated.
*/
size_t
bwscpy(struct bwstring *dst, const struct bwstring *src)
{
size_t nums = src->len;
if (nums > dst->len)
nums = dst->len;
dst->len = nums;
if (sort_mb_cur_max == 1) {
memcpy(dst->data.cstr, src->data.cstr, nums);
dst->data.cstr[dst->len] = '\0';
} else {
memcpy(dst->data.wstr, src->data.wstr,
SIZEOF_WCHAR_STRING(nums + 1));
dst->data.wstr[dst->len] = L'\0';
}
return nums;
}
/*
* Copy content of src binary string to dst,
* with specified number of symbols to be copied.
* If the capacity of the dst string is not sufficient,
* then the data is truncated.
*/
struct bwstring *
bwsncpy(struct bwstring *dst, const struct bwstring *src, size_t size)
{
size_t nums = src->len;
if (nums > dst->len)
nums = dst->len;
if (nums > size)
nums = size;
dst->len = nums;
if (sort_mb_cur_max == 1) {
memcpy(dst->data.cstr, src->data.cstr, nums);
dst->data.cstr[dst->len] = '\0';
} else {
memcpy(dst->data.wstr, src->data.wstr,
SIZEOF_WCHAR_STRING(nums + 1));
dst->data.wstr[dst->len] = L'\0';
}
return dst;
}
/*
* Copy content of src binary string to dst,
* with specified number of symbols to be copied.
* An offset value can be specified, from the start of src string.
* If the capacity of the dst string is not sufficient,
* then the data is truncated.
*/
struct bwstring *
bwsnocpy(struct bwstring *dst, const struct bwstring *src, size_t offset,
size_t size)
{
if (offset >= src->len) {
dst->data.wstr[0] = 0;
dst->len = 0;
} else {
size_t nums = src->len - offset;
if (nums > dst->len)
nums = dst->len;
if (nums > size)
nums = size;
dst->len = nums;
if (sort_mb_cur_max == 1) {
memcpy(dst->data.cstr, src->data.cstr + offset,
(nums));
dst->data.cstr[dst->len] = '\0';
} else {
memcpy(dst->data.wstr, src->data.wstr + offset,
SIZEOF_WCHAR_STRING(nums));
dst->data.wstr[dst->len] = L'\0';
}
}
return dst;
}
/*
* Write binary string to the file.
* The output is ended either with '\n' (nl == true)
* or '\0' (nl == false).
*/
size_t
bwsfwrite(struct bwstring *bws, FILE *f, bool zero_ended)
{
if (sort_mb_cur_max == 1) {
size_t len = bws->len;
if (!zero_ended) {
bws->data.cstr[len] = '\n';
if (fwrite(bws->data.cstr, len + 1, 1, f) < 1)
err(2, NULL);
bws->data.cstr[len] = '\0';
} else if (fwrite(bws->data.cstr, len + 1, 1, f) < 1)
err(2, NULL);
return len + 1;
} else {
wchar_t eols;
size_t printed = 0;
eols = zero_ended ? btowc('\0') : btowc('\n');
while (printed < BWSLEN(bws)) {
const wchar_t *s = bws->data.wstr + printed;
if (*s == L'\0') {
int nums;
nums = fwprintf(f, L"%lc", *s);
if (nums != 1)
err(2, NULL);
++printed;
} else {
int nums;
nums = fwprintf(f, L"%ls", s);
if (nums < 1)
err(2, NULL);
printed += nums;
}
}
fwprintf(f, L"%lc", eols);
return printed + 1;
}
}
/*
* Allocate and read a binary string from file.
* The strings are nl-ended or zero-ended, depending on the sort setting.
*/
struct bwstring *
bwsfgetln(FILE *f, size_t *len, bool zero_ended, struct reader_buffer *rb)
{
wint_t eols;
eols = zero_ended ? btowc('\0') : btowc('\n');
if (!zero_ended && (sort_mb_cur_max > 1)) {
wchar_t *ret;
ret = fgetwln(f, len);
if (ret == NULL) {
if (!feof(f))
err(2, NULL);
return NULL;
}
if (*len > 0) {
if (ret[*len - 1] == (wchar_t)eols)
--(*len);
}
return bwssbdup(ret, *len);
} else if (!zero_ended && (sort_mb_cur_max == 1)) {
char *ret;
ret = fgetln(f, len);
if (ret == NULL) {
if (!feof(f))
err(2, NULL);
return NULL;
}
if (*len > 0) {
if (ret[*len - 1] == '\n')
--(*len);
}
return bwscsbdup((unsigned char *)ret, *len);
} else {
*len = 0;
if (feof(f))
return NULL;
if (2 >= rb->fgetwln_z_buffer_size) {
rb->fgetwln_z_buffer_size += 256;
rb->fgetwln_z_buffer =
sort_reallocarray(rb->fgetwln_z_buffer,
rb->fgetwln_z_buffer_size, sizeof(wchar_t));
}
rb->fgetwln_z_buffer[*len] = 0;
if (sort_mb_cur_max == 1) {
while (!feof(f)) {
int c;
c = fgetc(f);
if (c == EOF) {
if (*len == 0)
return NULL;
goto line_read_done;
}
if (c == eols)
goto line_read_done;
if (*len + 1 >= rb->fgetwln_z_buffer_size) {
rb->fgetwln_z_buffer_size += 256;
rb->fgetwln_z_buffer =
sort_reallocarray(rb->fgetwln_z_buffer,
rb->fgetwln_z_buffer_size, sizeof(wchar_t));
}
rb->fgetwln_z_buffer[*len] = c;
rb->fgetwln_z_buffer[++(*len)] = 0;
}
} else {
while (!feof(f)) {
wint_t c = 0;
c = fgetwc(f);
if (c == WEOF) {
if (*len == 0)
return NULL;
goto line_read_done;
}
if (c == eols)
goto line_read_done;
if (*len + 1 >= rb->fgetwln_z_buffer_size) {
rb->fgetwln_z_buffer_size += 256;
rb->fgetwln_z_buffer =
sort_reallocarray(rb->fgetwln_z_buffer,
rb->fgetwln_z_buffer_size, sizeof(wchar_t));
}
rb->fgetwln_z_buffer[*len] = c;
rb->fgetwln_z_buffer[++(*len)] = 0;
}
}
line_read_done:
/* we do not count the last 0 */
return bwssbdup(rb->fgetwln_z_buffer, *len);
}
}
int
bwsncmp(const struct bwstring *bws1, const struct bwstring *bws2,
size_t offset, size_t len)
{
size_t cmp_len, len1, len2;
int res = 0;
len1 = bws1->len;
len2 = bws2->len;
if (len1 <= offset) {
return (len2 <= offset) ? 0 : -1;
} else {
if (len2 <= offset)
return 1;
else {
len1 -= offset;
len2 -= offset;
cmp_len = len1;
if (len2 < cmp_len)
cmp_len = len2;
if (len < cmp_len)
cmp_len = len;
if (sort_mb_cur_max == 1) {
const unsigned char *s1, *s2;
s1 = bws1->data.cstr + offset;
s2 = bws2->data.cstr + offset;
res = memcmp(s1, s2, cmp_len);
} else {
const wchar_t *s1, *s2;
s1 = bws1->data.wstr + offset;
s2 = bws2->data.wstr + offset;
res = memcmp(s1, s2, SIZEOF_WCHAR_STRING(cmp_len));
}
}
}
if (res == 0) {
if (len1 < cmp_len && len1 < len2)
res = -1;
else if (len2 < cmp_len && len2 < len1)
res = +1;
}
return res;
}
int
bwscmp(const struct bwstring *bws1, const struct bwstring *bws2, size_t offset)
{
size_t len1, len2, cmp_len;
int res;
len1 = bws1->len;
len2 = bws2->len;
len1 -= offset;
len2 -= offset;
cmp_len = len1;
if (len2 < cmp_len)
cmp_len = len2;
res = bwsncmp(bws1, bws2, offset, cmp_len);
if (res == 0) {
if (len1 < len2)
res = -1;
else if (len2 < len1)
res = +1;
}
return res;
}
int
bws_iterator_cmp(bwstring_iterator iter1, bwstring_iterator iter2, size_t len)
{
wchar_t c1, c2;
size_t i = 0;
for (i = 0; i < len; ++i) {
c1 = bws_get_iter_value(iter1);
c2 = bws_get_iter_value(iter2);
if (c1 != c2)
return c1 - c2;
iter1 = bws_iterator_inc(iter1, 1);
iter2 = bws_iterator_inc(iter2, 1);
}
return 0;
}
int
bwscoll(const struct bwstring *bws1, const struct bwstring *bws2, size_t offset)
{
size_t len1, len2;
len1 = bws1->len;
len2 = bws2->len;
if (len1 <= offset)
return (len2 <= offset) ? 0 : -1;
if (len2 <= offset)
return 1;
len1 -= offset;
len2 -= offset;
if (sort_mb_cur_max == 1) {
const unsigned char *s1, *s2;
int res;
s1 = bws1->data.cstr + offset;
s2 = bws2->data.cstr + offset;
if (len1 > len2) {
res = memcmp(s1, s2, len2);
if (!res)
res = +1;
} else if (len1 < len2) {
res = memcmp(s1, s2, len1);
if (!res)
res = -1;
} else
res = memcmp(s1, s2, len1);
return res;
} else {
const wchar_t *s1, *s2;
size_t i, maxlen;
int res = 0;
s1 = bws1->data.wstr + offset;
s2 = bws2->data.wstr + offset;
i = 0;
maxlen = len1;
if (maxlen > len2)
maxlen = len2;
while (i < maxlen) {
/* goto next non-zero part: */
while (i < maxlen &&
s1[i] == L'\0' && s2[i] == L'\0')
++i;
if (i >= maxlen)
break;
if (s1[i] == L'\0') {
if (s2[i] == L'\0')
/* NOTREACHED */
err(2, "bwscoll error 1");
else
return -1;
} else if (s2[i] == L'\0')
return 1;
res = wide_str_coll(s1 + i, s2 + i);
if (res)
return res;
while (i < maxlen && s1[i] != L'\0' && s2[i] != L'\0')
++i;
if (i >= maxlen)
break;
if (s1[i] == L'\0') {
if (s2[i] == L'\0') {
++i;
continue;
} else
return -1;
} else if (s2[i] == L'\0')
return 1;
else
/* NOTREACHED */
err(2, "bwscoll error 2");
}
if (len1 == len2)
return 0;
return len1 < len2 ? -1 : 1;
}
}
/*
* Correction of the system API
*/
double
bwstod(struct bwstring *s0, bool *empty)
{
double ret = 0;
if (sort_mb_cur_max == 1) {
char *ep, *end, *s;
s = (char *)s0->data.cstr;
end = s + s0->len;
ep = NULL;
while (isblank((unsigned char)*s) && s < end)
++s;
if (!isprint((unsigned char)*s)) {
*empty = true;
return 0;
}
ret = strtod(s, &ep);
if (ep == s) {
*empty = true;
return 0;
}
} else {
wchar_t *end, *ep, *s;
s = s0->data.wstr;
end = s + s0->len;
ep = NULL;
while (iswblank(*s) && s < end)
++s;
if (!iswprint(*s)) {
*empty = true;
return 0;
}
ret = wcstod(s, &ep);
if (ep == s) {
*empty = true;
return 0;
}
}
*empty = false;
return ret;
}
/*
* A helper function for monthcoll. If a line matches
* a month name, it returns (number of the month - 1),
* while if there is no match, it just return -1.
*/
int
bws_month_score(const struct bwstring *s0)
{
if (sort_mb_cur_max == 1) {
const char *end, *s;
int i;
s = (char *)s0->data.cstr;
end = s + s0->len;
while (isblank((unsigned char)*s) && s < end)
++s;
for (i = 11; i >= 0; --i) {
if (cmonths[i] &&
(s == strstr(s, cmonths[i])))
return i;
}
} else {
const wchar_t *end, *s;
int i;
s = s0->data.wstr;
end = s + s0->len;
while (iswblank(*s) && s < end)
++s;
for (i = 11; i >= 0; --i) {
if (wmonths[i] && (s == wcsstr(s, wmonths[i])))
return i;
}
}
return -1;
}
/*
* Rips out leading blanks (-b).
*/
struct bwstring *
ignore_leading_blanks(struct bwstring *str)
{
if (sort_mb_cur_max == 1) {
unsigned char *dst, *end, *src;
src = str->data.cstr;
dst = src;
end = src + str->len;
while (src < end && isblank(*src))
++src;
if (src != dst) {
size_t newlen;
newlen = BWSLEN(str) - (src - dst);
while (src < end) {
*dst = *src;
++dst;
++src;
}
bws_setlen(str, newlen);
}
} else {
wchar_t *dst, *end, *src;
src = str->data.wstr;
dst = src;
end = src + str->len;
while (src < end && iswblank(*src))
++src;
if (src != dst) {
size_t newlen = BWSLEN(str) - (src - dst);
while (src < end) {
*dst = *src;
++dst;
++src;
}
bws_setlen(str, newlen);
}
}
return str;
}
/*
* Rips out nonprinting characters (-i).
*/
struct bwstring *
ignore_nonprinting(struct bwstring *str)
{
size_t newlen = str->len;
if (sort_mb_cur_max == 1) {
unsigned char *dst, *end, *src;
unsigned char c;
src = str->data.cstr;
dst = src;
end = src + str->len;
while (src < end) {
c = *src;
if (isprint(c)) {
*dst = c;
++dst;
++src;
} else {
++src;
--newlen;
}
}
} else {
wchar_t *dst, *end, *src;
wchar_t c;
src = str->data.wstr;
dst = src;
end = src + str->len;
while (src < end) {
c = *src;
if (iswprint(c)) {
*dst = c;
++dst;
++src;
} else {
++src;
--newlen;
}
}
}
bws_setlen(str, newlen);
return str;
}
/*
* Rips out any characters that are not alphanumeric characters
* nor blanks (-d).
*/
struct bwstring *
dictionary_order(struct bwstring *str)
{
size_t newlen = str->len;
if (sort_mb_cur_max == 1) {
unsigned char *dst, *end, *src;
unsigned char c;
src = str->data.cstr;
dst = src;
end = src + str->len;
while (src < end) {
c = *src;
if (isalnum(c) || isblank(c)) {
*dst = c;
++dst;
++src;
} else {
++src;
--newlen;
}
}
} else {
wchar_t *dst, *end, *src;
wchar_t c;
src = str->data.wstr;
dst = src;
end = src + str->len;
while (src < end) {
c = *src;
if (iswalnum(c) || iswblank(c)) {
*dst = c;
++dst;
++src;
} else {
++src;
--newlen;
}
}
}
bws_setlen(str, newlen);
return str;
}
/*
* Converts string to lower case(-f).
*/
struct bwstring *
ignore_case(struct bwstring *str)
{
if (sort_mb_cur_max == 1) {
unsigned char *end, *s;
s = str->data.cstr;
end = s + str->len;
while (s < end) {
*s = toupper(*s);
++s;
}
} else {
wchar_t *end, *s;
s = str->data.wstr;
end = s + str->len;
while (s < end) {
*s = towupper(*s);
++s;
}
}
return str;
}
void
bws_disorder_warnx(struct bwstring *s, const char *fn, size_t pos)
{
if (sort_mb_cur_max == 1)
warnx("%s:%zu: disorder: %s", fn, pos + 1, s->data.cstr);
else
warnx("%s:%zu: disorder: %ls", fn, pos + 1, s->data.wstr);
}
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