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freebsd-dev/usr.bin/sort/coll.c
Pedro F. Giffuni 1de7b4b805 various: general adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <errno.h>
#include <err.h>
#include <langinfo.h>
#include <limits.h>
#include <math.h>
#include <md5.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include "coll.h"
#include "vsort.h"
struct key_specs *keys;
size_t keys_num = 0;
wint_t symbol_decimal_point = L'.';
/* there is no default thousands separator in collate rules: */
wint_t symbol_thousands_sep = 0;
wint_t symbol_negative_sign = L'-';
wint_t symbol_positive_sign = L'+';
static int wstrcoll(struct key_value *kv1, struct key_value *kv2, size_t offset);
static int gnumcoll(struct key_value*, struct key_value *, size_t offset);
static int monthcoll(struct key_value*, struct key_value *, size_t offset);
static int numcoll(struct key_value*, struct key_value *, size_t offset);
static int hnumcoll(struct key_value*, struct key_value *, size_t offset);
static int randomcoll(struct key_value*, struct key_value *, size_t offset);
static int versioncoll(struct key_value*, struct key_value *, size_t offset);
/*
* Allocate keys array
*/
struct keys_array *
keys_array_alloc(void)
{
struct keys_array *ka;
size_t sz;
sz = keys_array_size();
ka = sort_malloc(sz);
memset(ka, 0, sz);
return (ka);
}
/*
* Calculate whether we need key hint space
*/
static size_t
key_hint_size(void)
{
return (need_hint ? sizeof(struct key_hint) : 0);
}
/*
* Calculate keys array size
*/
size_t
keys_array_size(void)
{
return (keys_num * (sizeof(struct key_value) + key_hint_size()));
}
/*
* Clean data of keys array
*/
void
clean_keys_array(const struct bwstring *s, struct keys_array *ka)
{
if (ka) {
for (size_t i = 0; i < keys_num; ++i) {
const struct key_value *kv;
kv = get_key_from_keys_array(ka, i);
if (kv->k && kv->k != s)
bwsfree(kv->k);
}
memset(ka, 0, keys_array_size());
}
}
/*
* Get pointer to a key value in the keys set
*/
struct key_value *
get_key_from_keys_array(struct keys_array *ka, size_t ind)
{
return ((struct key_value *)((caddr_t)ka->key +
ind * (sizeof(struct key_value) + key_hint_size())));
}
/*
* Set value of a key in the keys set
*/
void
set_key_on_keys_array(struct keys_array *ka, struct bwstring *s, size_t ind)
{
if (ka && keys_num > ind) {
struct key_value *kv;
kv = get_key_from_keys_array(ka, ind);
if (kv->k && kv->k != s)
bwsfree(kv->k);
kv->k = s;
}
}
/*
* Initialize a sort list item
*/
struct sort_list_item *
sort_list_item_alloc(void)
{
struct sort_list_item *si;
size_t sz;
sz = sizeof(struct sort_list_item) + keys_array_size();
si = sort_malloc(sz);
memset(si, 0, sz);
return (si);
}
size_t
sort_list_item_size(struct sort_list_item *si)
{
size_t ret = 0;
if (si) {
ret = sizeof(struct sort_list_item) + keys_array_size();
if (si->str)
ret += bws_memsize(si->str);
for (size_t i = 0; i < keys_num; ++i) {
const struct key_value *kv;
kv = get_key_from_keys_array(&si->ka, i);
if (kv->k != si->str)
ret += bws_memsize(kv->k);
}
}
return (ret);
}
/*
* Calculate key for a sort list item
*/
static void
sort_list_item_make_key(struct sort_list_item *si)
{
preproc(si->str, &(si->ka));
}
/*
* Set value of a sort list item.
* Return combined string and keys memory size.
*/
void
sort_list_item_set(struct sort_list_item *si, struct bwstring *str)
{
if (si) {
clean_keys_array(si->str, &(si->ka));
if (si->str) {
if (si->str == str) {
/* we are trying to reset the same string */
return;
} else {
bwsfree(si->str);
si->str = NULL;
}
}
si->str = str;
sort_list_item_make_key(si);
}
}
/*
* De-allocate a sort list item object memory
*/
void
sort_list_item_clean(struct sort_list_item *si)
{
if (si) {
clean_keys_array(si->str, &(si->ka));
if (si->str) {
bwsfree(si->str);
si->str = NULL;
}
}
}
/*
* Skip columns according to specs
*/
static size_t
skip_cols_to_start(const struct bwstring *s, size_t cols, size_t start,
bool skip_blanks, bool *empty_key)
{
if (cols < 1)
return (BWSLEN(s) + 1);
if (skip_blanks)
while (start < BWSLEN(s) && iswblank(BWS_GET(s,start)))
++start;
while (start < BWSLEN(s) && cols > 1) {
--cols;
++start;
}
if (start >= BWSLEN(s))
*empty_key = true;
return (start);
}
/*
* Skip fields according to specs
*/
static size_t
skip_fields_to_start(const struct bwstring *s, size_t fields, bool *empty_field)
{
if (fields < 2) {
if (BWSLEN(s) == 0)
*empty_field = true;
return (0);
} else if (!(sort_opts_vals.tflag)) {
size_t cpos = 0;
bool pb = true;
while (cpos < BWSLEN(s)) {
bool isblank;
isblank = iswblank(BWS_GET(s, cpos));
if (isblank && !pb) {
--fields;
if (fields <= 1)
return (cpos);
}
pb = isblank;
++cpos;
}
if (fields > 1)
*empty_field = true;
return (cpos);
} else {
size_t cpos = 0;
while (cpos < BWSLEN(s)) {
if (BWS_GET(s,cpos) == (wchar_t)sort_opts_vals.field_sep) {
--fields;
if (fields <= 1)
return (cpos + 1);
}
++cpos;
}
if (fields > 1)
*empty_field = true;
return (cpos);
}
}
/*
* Find fields start
*/
static void
find_field_start(const struct bwstring *s, struct key_specs *ks,
size_t *field_start, size_t *key_start, bool *empty_field, bool *empty_key)
{
*field_start = skip_fields_to_start(s, ks->f1, empty_field);
if (!*empty_field)
*key_start = skip_cols_to_start(s, ks->c1, *field_start,
ks->pos1b, empty_key);
else
*empty_key = true;
}
/*
* Find end key position
*/
static size_t
find_field_end(const struct bwstring *s, struct key_specs *ks)
{
size_t f2, next_field_start, pos_end;
bool empty_field, empty_key;
empty_field = false;
empty_key = false;
f2 = ks->f2;
if (f2 == 0)
return (BWSLEN(s) + 1);
else {
if (ks->c2 == 0) {
next_field_start = skip_fields_to_start(s, f2 + 1,
&empty_field);
if ((next_field_start > 0) && sort_opts_vals.tflag &&
((wchar_t)sort_opts_vals.field_sep == BWS_GET(s,
next_field_start - 1)))
--next_field_start;
} else
next_field_start = skip_fields_to_start(s, f2,
&empty_field);
}
if (empty_field || (next_field_start >= BWSLEN(s)))
return (BWSLEN(s) + 1);
if (ks->c2) {
pos_end = skip_cols_to_start(s, ks->c2, next_field_start,
ks->pos2b, &empty_key);
if (pos_end < BWSLEN(s))
++pos_end;
} else
pos_end = next_field_start;
return (pos_end);
}
/*
* Cut a field according to the key specs
*/
static struct bwstring *
cut_field(const struct bwstring *s, struct key_specs *ks)
{
struct bwstring *ret = NULL;
if (s && ks) {
size_t field_start, key_end, key_start, sz;
bool empty_field, empty_key;
field_start = 0;
key_start = 0;
empty_field = false;
empty_key = false;
find_field_start(s, ks, &field_start, &key_start,
&empty_field, &empty_key);
if (empty_key)
sz = 0;
else {
key_end = find_field_end(s, ks);
sz = (key_end < key_start) ? 0 : (key_end - key_start);
}
ret = bwsalloc(sz);
if (sz)
bwsnocpy(ret, s, key_start, sz);
} else
ret = bwsalloc(0);
return (ret);
}
/*
* Preprocesses a line applying the necessary transformations
* specified by command line options and returns the preprocessed
* string, which can be used to compare.
*/
int
preproc(struct bwstring *s, struct keys_array *ka)
{
if (sort_opts_vals.kflag)
for (size_t i = 0; i < keys_num; i++) {
struct bwstring *key;
struct key_specs *kspecs;
struct sort_mods *sm;
kspecs = &(keys[i]);
key = cut_field(s, kspecs);
sm = &(kspecs->sm);
if (sm->dflag)
key = dictionary_order(key);
else if (sm->iflag)
key = ignore_nonprinting(key);
if (sm->fflag || sm->Mflag)
key = ignore_case(key);
set_key_on_keys_array(ka, key, i);
}
else {
struct bwstring *ret = NULL;
struct sort_mods *sm = default_sort_mods;
if (sm->bflag) {
if (ret == NULL)
ret = bwsdup(s);
ret = ignore_leading_blanks(ret);
}
if (sm->dflag) {
if (ret == NULL)
ret = bwsdup(s);
ret = dictionary_order(ret);
} else if (sm->iflag) {
if (ret == NULL)
ret = bwsdup(s);
ret = ignore_nonprinting(ret);
}
if (sm->fflag || sm->Mflag) {
if (ret == NULL)
ret = bwsdup(s);
ret = ignore_case(ret);
}
if (ret == NULL)
set_key_on_keys_array(ka, s, 0);
else
set_key_on_keys_array(ka, ret, 0);
}
return 0;
}
cmpcoll_t
get_sort_func(struct sort_mods *sm)
{
if (sm->nflag)
return (numcoll);
else if (sm->hflag)
return (hnumcoll);
else if (sm->gflag)
return (gnumcoll);
else if (sm->Mflag)
return (monthcoll);
else if (sm->Rflag)
return (randomcoll);
else if (sm->Vflag)
return (versioncoll);
else
return (wstrcoll);
}
/*
* Compares the given strings. Returns a positive number if
* the first precedes the second, a negative number if the second is
* the preceding one, and zero if they are equal. This function calls
* the underlying collate functions, which done the actual comparison.
*/
int
key_coll(struct keys_array *ps1, struct keys_array *ps2, size_t offset)
{
struct key_value *kv1, *kv2;
struct sort_mods *sm;
int res = 0;
for (size_t i = 0; i < keys_num; ++i) {
kv1 = get_key_from_keys_array(ps1, i);
kv2 = get_key_from_keys_array(ps2, i);
sm = &(keys[i].sm);
if (sm->rflag)
res = sm->func(kv2, kv1, offset);
else
res = sm->func(kv1, kv2, offset);
if (res)
break;
/* offset applies to only the first key */
offset = 0;
}
return (res);
}
/*
* Compare two strings.
* Plain symbol-by-symbol comparison.
*/
int
top_level_str_coll(const struct bwstring *s1, const struct bwstring *s2)
{
if (default_sort_mods->rflag) {
const struct bwstring *tmp;
tmp = s1;
s1 = s2;
s2 = tmp;
}
return (bwscoll(s1, s2, 0));
}
/*
* Compare a string and a sort list item, according to the sort specs.
*/
int
str_list_coll(struct bwstring *str1, struct sort_list_item **ss2)
{
struct keys_array *ka1;
int ret = 0;
ka1 = keys_array_alloc();
preproc(str1, ka1);
sort_list_item_make_key(*ss2);
if (debug_sort) {
bwsprintf(stdout, str1, "; s1=<", ">");
bwsprintf(stdout, (*ss2)->str, ", s2=<", ">");
}
ret = key_coll(ka1, &((*ss2)->ka), 0);
if (debug_sort)
printf("; cmp1=%d", ret);
clean_keys_array(str1, ka1);
sort_free(ka1);
if ((ret == 0) && !(sort_opts_vals.sflag) && sort_opts_vals.complex_sort) {
ret = top_level_str_coll(str1, ((*ss2)->str));
if (debug_sort)
printf("; cmp2=%d", ret);
}
if (debug_sort)
printf("\n");
return (ret);
}
/*
* Compare two sort list items, according to the sort specs.
*/
int
list_coll_offset(struct sort_list_item **ss1, struct sort_list_item **ss2,
size_t offset)
{
int ret;
ret = key_coll(&((*ss1)->ka), &((*ss2)->ka), offset);
if (debug_sort) {
if (offset)
printf("; offset=%d", (int) offset);
bwsprintf(stdout, ((*ss1)->str), "; s1=<", ">");
bwsprintf(stdout, ((*ss2)->str), ", s2=<", ">");
printf("; cmp1=%d\n", ret);
}
if (ret)
return (ret);
if (!(sort_opts_vals.sflag) && sort_opts_vals.complex_sort) {
ret = top_level_str_coll(((*ss1)->str), ((*ss2)->str));
if (debug_sort)
printf("; cmp2=%d\n", ret);
}
return (ret);
}
/*
* Compare two sort list items, according to the sort specs.
*/
int
list_coll(struct sort_list_item **ss1, struct sort_list_item **ss2)
{
return (list_coll_offset(ss1, ss2, 0));
}
#define LSCDEF(N) \
static int \
list_coll_##N(struct sort_list_item **ss1, struct sort_list_item **ss2) \
{ \
\
return (list_coll_offset(ss1, ss2, N)); \
}
LSCDEF(1)
LSCDEF(2)
LSCDEF(3)
LSCDEF(4)
LSCDEF(5)
LSCDEF(6)
LSCDEF(7)
LSCDEF(8)
LSCDEF(9)
LSCDEF(10)
LSCDEF(11)
LSCDEF(12)
LSCDEF(13)
LSCDEF(14)
LSCDEF(15)
LSCDEF(16)
LSCDEF(17)
LSCDEF(18)
LSCDEF(19)
LSCDEF(20)
listcoll_t
get_list_call_func(size_t offset)
{
static const listcoll_t lsarray[] = { list_coll, list_coll_1,
list_coll_2, list_coll_3, list_coll_4, list_coll_5,
list_coll_6, list_coll_7, list_coll_8, list_coll_9,
list_coll_10, list_coll_11, list_coll_12, list_coll_13,
list_coll_14, list_coll_15, list_coll_16, list_coll_17,
list_coll_18, list_coll_19, list_coll_20 };
if (offset <= 20)
return (lsarray[offset]);
return (list_coll);
}
/*
* Compare two sort list items, only by their original string.
*/
int
list_coll_by_str_only(struct sort_list_item **ss1, struct sort_list_item **ss2)
{
return (top_level_str_coll(((*ss1)->str), ((*ss2)->str)));
}
/*
* Maximum size of a number in the string (before or after decimal point)
*/
#define MAX_NUM_SIZE (128)
/*
* Set suffix value
*/
static void setsuffix(wchar_t c, unsigned char *si)
{
switch (c){
case L'k':
case L'K':
*si = 1;
break;
case L'M':
*si = 2;
break;
case L'G':
*si = 3;
break;
case L'T':
*si = 4;
break;
case L'P':
*si = 5;
break;
case L'E':
*si = 6;
break;
case L'Z':
*si = 7;
break;
case L'Y':
*si = 8;
break;
default:
*si = 0;
}
}
/*
* Read string s and parse the string into a fixed-decimal-point number.
* sign equals -1 if the number is negative (explicit plus is not allowed,
* according to GNU sort's "info sort".
* The number part before decimal point is in the smain, after the decimal
* point is in sfrac, tail is the pointer to the remainder of the string.
*/
static int
read_number(struct bwstring *s0, int *sign, wchar_t *smain, size_t *main_len, wchar_t *sfrac, size_t *frac_len, unsigned char *si)
{
bwstring_iterator s;
s = bws_begin(s0);
/* always end the fraction with zero, even if we have no fraction */
sfrac[0] = 0;
while (iswblank(bws_get_iter_value(s)))
s = bws_iterator_inc(s, 1);
if (bws_get_iter_value(s) == (wchar_t)symbol_negative_sign) {
*sign = -1;
s = bws_iterator_inc(s, 1);
}
// This is '0', not '\0', do not change this
while (iswdigit(bws_get_iter_value(s)) &&
(bws_get_iter_value(s) == L'0'))
s = bws_iterator_inc(s, 1);
while (bws_get_iter_value(s) && *main_len < MAX_NUM_SIZE) {
if (iswdigit(bws_get_iter_value(s))) {
smain[*main_len] = bws_get_iter_value(s);
s = bws_iterator_inc(s, 1);
*main_len += 1;
} else if (symbol_thousands_sep &&
(bws_get_iter_value(s) == (wchar_t)symbol_thousands_sep))
s = bws_iterator_inc(s, 1);
else
break;
}
smain[*main_len] = 0;
if (bws_get_iter_value(s) == (wchar_t)symbol_decimal_point) {
s = bws_iterator_inc(s, 1);
while (iswdigit(bws_get_iter_value(s)) &&
*frac_len < MAX_NUM_SIZE) {
sfrac[*frac_len] = bws_get_iter_value(s);
s = bws_iterator_inc(s, 1);
*frac_len += 1;
}
sfrac[*frac_len] = 0;
while (*frac_len > 0 && sfrac[*frac_len - 1] == L'0') {
--(*frac_len);
sfrac[*frac_len] = L'\0';
}
}
setsuffix(bws_get_iter_value(s),si);
if ((*main_len + *frac_len) == 0)
*sign = 0;
return (0);
}
/*
* Implements string sort.
*/
static int
wstrcoll(struct key_value *kv1, struct key_value *kv2, size_t offset)
{
if (debug_sort) {
if (offset)
printf("; offset=%d\n", (int) offset);
bwsprintf(stdout, kv1->k, "; k1=<", ">");
printf("(%zu)", BWSLEN(kv1->k));
bwsprintf(stdout, kv2->k, ", k2=<", ">");
printf("(%zu)", BWSLEN(kv2->k));
}
return (bwscoll(kv1->k, kv2->k, offset));
}
/*
* Compare two suffixes
*/
static inline int
cmpsuffix(unsigned char si1, unsigned char si2)
{
return ((char)si1 - (char)si2);
}
/*
* Implements numeric sort for -n and -h.
*/
static int
numcoll_impl(struct key_value *kv1, struct key_value *kv2,
size_t offset __unused, bool use_suffix)
{
struct bwstring *s1, *s2;
wchar_t sfrac1[MAX_NUM_SIZE + 1], sfrac2[MAX_NUM_SIZE + 1];
wchar_t smain1[MAX_NUM_SIZE + 1], smain2[MAX_NUM_SIZE + 1];
int cmp_res, sign1, sign2;
size_t frac1, frac2, main1, main2;
unsigned char SI1, SI2;
bool e1, e2, key1_read, key2_read;
s1 = kv1->k;
s2 = kv2->k;
sign1 = sign2 = 0;
main1 = main2 = 0;
frac1 = frac2 = 0;
key1_read = key2_read = false;
if (debug_sort) {
bwsprintf(stdout, s1, "; k1=<", ">");
bwsprintf(stdout, s2, ", k2=<", ">");
}
if (s1 == s2)
return (0);
if (kv1->hint->status == HS_UNINITIALIZED) {
/* read the number from the string */
read_number(s1, &sign1, smain1, &main1, sfrac1, &frac1, &SI1);
key1_read = true;
kv1->hint->v.nh.n1 = wcstoull(smain1, NULL, 10);
if(main1 < 1 && frac1 < 1)
kv1->hint->v.nh.empty=true;
kv1->hint->v.nh.si = SI1;
kv1->hint->status = (kv1->hint->v.nh.n1 != ULLONG_MAX) ?
HS_INITIALIZED : HS_ERROR;
kv1->hint->v.nh.neg = (sign1 < 0) ? true : false;
}
if (kv2->hint->status == HS_UNINITIALIZED) {
/* read the number from the string */
read_number(s2, &sign2, smain2, &main2, sfrac2, &frac2,&SI2);
key2_read = true;
kv2->hint->v.nh.n1 = wcstoull(smain2, NULL, 10);
if(main2 < 1 && frac2 < 1)
kv2->hint->v.nh.empty=true;
kv2->hint->v.nh.si = SI2;
kv2->hint->status = (kv2->hint->v.nh.n1 != ULLONG_MAX) ?
HS_INITIALIZED : HS_ERROR;
kv2->hint->v.nh.neg = (sign2 < 0) ? true : false;
}
if (kv1->hint->status == HS_INITIALIZED && kv2->hint->status ==
HS_INITIALIZED) {
unsigned long long n1, n2;
bool neg1, neg2;
e1 = kv1->hint->v.nh.empty;
e2 = kv2->hint->v.nh.empty;
if (e1 && e2)
return (0);
neg1 = kv1->hint->v.nh.neg;
neg2 = kv2->hint->v.nh.neg;
if (neg1 && !neg2)
return (-1);
if (neg2 && !neg1)
return (+1);
if (e1)
return (neg2 ? +1 : -1);
else if (e2)
return (neg1 ? -1 : +1);
if (use_suffix) {
cmp_res = cmpsuffix(kv1->hint->v.nh.si, kv2->hint->v.nh.si);
if (cmp_res)
return (neg1 ? -cmp_res : cmp_res);
}
n1 = kv1->hint->v.nh.n1;
n2 = kv2->hint->v.nh.n1;
if (n1 < n2)
return (neg1 ? +1 : -1);
else if (n1 > n2)
return (neg1 ? -1 : +1);
}
/* read the numbers from the strings */
if (!key1_read)
read_number(s1, &sign1, smain1, &main1, sfrac1, &frac1, &SI1);
if (!key2_read)
read_number(s2, &sign2, smain2, &main2, sfrac2, &frac2, &SI2);
e1 = ((main1 + frac1) == 0);
e2 = ((main2 + frac2) == 0);
if (e1 && e2)
return (0);
/* we know the result if the signs are different */
if (sign1 < 0 && sign2 >= 0)
return (-1);
if (sign1 >= 0 && sign2 < 0)
return (+1);
if (e1)
return ((sign2 < 0) ? +1 : -1);
else if (e2)
return ((sign1 < 0) ? -1 : +1);
if (use_suffix) {
cmp_res = cmpsuffix(SI1, SI2);
if (cmp_res)
return ((sign1 < 0) ? -cmp_res : cmp_res);
}
/* if both numbers are empty assume that the strings are equal */
if (main1 < 1 && main2 < 1 && frac1 < 1 && frac2 < 1)
return (0);
/*
* if the main part is of different size, we know the result
* (because the leading zeros are removed)
*/
if (main1 < main2)
cmp_res = -1;
else if (main1 > main2)
cmp_res = +1;
/* if the sizes are equal then simple non-collate string compare gives the correct result */
else
cmp_res = wcscmp(smain1, smain2);
/* check fraction */
if (!cmp_res)
cmp_res = wcscmp(sfrac1, sfrac2);
if (!cmp_res)
return (0);
/* reverse result if the signs are negative */
if (sign1 < 0 && sign2 < 0)
cmp_res = -cmp_res;
return (cmp_res);
}
/*
* Implements numeric sort (-n).
*/
static int
numcoll(struct key_value *kv1, struct key_value *kv2, size_t offset)
{
return (numcoll_impl(kv1, kv2, offset, false));
}
/*
* Implements 'human' numeric sort (-h).
*/
static int
hnumcoll(struct key_value *kv1, struct key_value *kv2, size_t offset)
{
return (numcoll_impl(kv1, kv2, offset, true));
}
/*
* Implements random sort (-R).
*/
static int
randomcoll(struct key_value *kv1, struct key_value *kv2,
size_t offset __unused)
{
struct bwstring *s1, *s2;
MD5_CTX ctx1, ctx2;
char *b1, *b2;
s1 = kv1->k;
s2 = kv2->k;
if (debug_sort) {
bwsprintf(stdout, s1, "; k1=<", ">");
bwsprintf(stdout, s2, ", k2=<", ">");
}
if (s1 == s2)
return (0);
memcpy(&ctx1,&md5_ctx,sizeof(MD5_CTX));
memcpy(&ctx2,&md5_ctx,sizeof(MD5_CTX));
MD5Update(&ctx1, bwsrawdata(s1), bwsrawlen(s1));
MD5Update(&ctx2, bwsrawdata(s2), bwsrawlen(s2));
b1 = MD5End(&ctx1, NULL);
b2 = MD5End(&ctx2, NULL);
if (b1 == NULL) {
if (b2 == NULL)
return (0);
else {
sort_free(b2);
return (-1);
}
} else if (b2 == NULL) {
sort_free(b1);
return (+1);
} else {
int cmp_res;
cmp_res = strcmp(b1,b2);
sort_free(b1);
sort_free(b2);
if (!cmp_res)
cmp_res = bwscoll(s1, s2, 0);
return (cmp_res);
}
}
/*
* Implements version sort (-V).
*/
static int
versioncoll(struct key_value *kv1, struct key_value *kv2,
size_t offset __unused)
{
struct bwstring *s1, *s2;
s1 = kv1->k;
s2 = kv2->k;
if (debug_sort) {
bwsprintf(stdout, s1, "; k1=<", ">");
bwsprintf(stdout, s2, ", k2=<", ">");
}
if (s1 == s2)
return (0);
return (vcmp(s1, s2));
}
/*
* Check for minus infinity
*/
static inline bool
huge_minus(double d, int err1)
{
if (err1 == ERANGE)
if (d == -HUGE_VAL || d == -HUGE_VALF || d == -HUGE_VALL)
return (+1);
return (0);
}
/*
* Check for plus infinity
*/
static inline bool
huge_plus(double d, int err1)
{
if (err1 == ERANGE)
if (d == HUGE_VAL || d == HUGE_VALF || d == HUGE_VALL)
return (+1);
return (0);
}
/*
* Check whether a function is a NAN
*/
static bool
is_nan(double d)
{
return ((d == NAN) || (isnan(d)));
}
/*
* Compare two NANs
*/
static int
cmp_nans(double d1, double d2)
{
if (d1 < d2)
return (-1);
if (d1 > d2)
return (+1);
return (0);
}
/*
* Implements general numeric sort (-g).
*/
static int
gnumcoll(struct key_value *kv1, struct key_value *kv2,
size_t offset __unused)
{
double d1, d2;
int err1, err2;
bool empty1, empty2, key1_read, key2_read;
d1 = d2 = 0;
err1 = err2 = 0;
key1_read = key2_read = false;
if (debug_sort) {
bwsprintf(stdout, kv1->k, "; k1=<", ">");
bwsprintf(stdout, kv2->k, "; k2=<", ">");
}
if (kv1->hint->status == HS_UNINITIALIZED) {
errno = 0;
d1 = bwstod(kv1->k, &empty1);
err1 = errno;
if (empty1)
kv1->hint->v.gh.notnum = true;
else if (err1 == 0) {
kv1->hint->v.gh.d = d1;
kv1->hint->v.gh.nan = is_nan(d1);
kv1->hint->status = HS_INITIALIZED;
} else
kv1->hint->status = HS_ERROR;
key1_read = true;
}
if (kv2->hint->status == HS_UNINITIALIZED) {
errno = 0;
d2 = bwstod(kv2->k, &empty2);
err2 = errno;
if (empty2)
kv2->hint->v.gh.notnum = true;
else if (err2 == 0) {
kv2->hint->v.gh.d = d2;
kv2->hint->v.gh.nan = is_nan(d2);
kv2->hint->status = HS_INITIALIZED;
} else
kv2->hint->status = HS_ERROR;
key2_read = true;
}
if (kv1->hint->status == HS_INITIALIZED &&
kv2->hint->status == HS_INITIALIZED) {
if (kv1->hint->v.gh.notnum)
return ((kv2->hint->v.gh.notnum) ? 0 : -1);
else if (kv2->hint->v.gh.notnum)
return (+1);
if (kv1->hint->v.gh.nan)
return ((kv2->hint->v.gh.nan) ?
cmp_nans(kv1->hint->v.gh.d, kv2->hint->v.gh.d) :
-1);
else if (kv2->hint->v.gh.nan)
return (+1);
d1 = kv1->hint->v.gh.d;
d2 = kv2->hint->v.gh.d;
if (d1 < d2)
return (-1);
else if (d1 > d2)
return (+1);
else
return (0);
}
if (!key1_read) {
errno = 0;
d1 = bwstod(kv1->k, &empty1);
err1 = errno;
}
if (!key2_read) {
errno = 0;
d2 = bwstod(kv2->k, &empty2);
err2 = errno;
}
/* Non-value case: */
if (empty1)
return (empty2 ? 0 : -1);
else if (empty2)
return (+1);
/* NAN case */
if (is_nan(d1))
return (is_nan(d2) ? cmp_nans(d1, d2) : -1);
else if (is_nan(d2))
return (+1);
/* Infinities */
if (err1 == ERANGE || err2 == ERANGE) {
/* Minus infinity case */
if (huge_minus(d1, err1)) {
if (huge_minus(d2, err2)) {
if (d1 < d2)
return (-1);
if (d1 > d2)
return (+1);
return (0);
} else
return (-1);
} else if (huge_minus(d2, err2)) {
if (huge_minus(d1, err1)) {
if (d1 < d2)
return (-1);
if (d1 > d2)
return (+1);
return (0);
} else
return (+1);
}
/* Plus infinity case */
if (huge_plus(d1, err1)) {
if (huge_plus(d2, err2)) {
if (d1 < d2)
return (-1);
if (d1 > d2)
return (+1);
return (0);
} else
return (+1);
} else if (huge_plus(d2, err2)) {
if (huge_plus(d1, err1)) {
if (d1 < d2)
return (-1);
if (d1 > d2)
return (+1);
return (0);
} else
return (-1);
}
}
if (d1 < d2)
return (-1);
if (d1 > d2)
return (+1);
return (0);
}
/*
* Implements month sort (-M).
*/
static int
monthcoll(struct key_value *kv1, struct key_value *kv2, size_t offset __unused)
{
int val1, val2;
bool key1_read, key2_read;
val1 = val2 = 0;
key1_read = key2_read = false;
if (debug_sort) {
bwsprintf(stdout, kv1->k, "; k1=<", ">");
bwsprintf(stdout, kv2->k, "; k2=<", ">");
}
if (kv1->hint->status == HS_UNINITIALIZED) {
kv1->hint->v.Mh.m = bws_month_score(kv1->k);
key1_read = true;
kv1->hint->status = HS_INITIALIZED;
}
if (kv2->hint->status == HS_UNINITIALIZED) {
kv2->hint->v.Mh.m = bws_month_score(kv2->k);
key2_read = true;
kv2->hint->status = HS_INITIALIZED;
}
if (kv1->hint->status == HS_INITIALIZED) {
val1 = kv1->hint->v.Mh.m;
key1_read = true;
}
if (kv2->hint->status == HS_INITIALIZED) {
val2 = kv2->hint->v.Mh.m;
key2_read = true;
}
if (!key1_read)
val1 = bws_month_score(kv1->k);
if (!key2_read)
val2 = bws_month_score(kv2->k);
if (val1 == val2) {
return (0);
}
if (val1 < val2)
return (-1);
return (+1);
}
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