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freebsd-skq/usr.bin/sort/coll.c
pfg 4a1d849efc Revert (partial) r281123, r281125: 
sort: style knits / cleanups.

Our style guide(9) specifies that in absence of local variables
an empty line must be inserted.

Pointed out by:	eadler
2015-04-06 02:35:55 +00:00

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/*-
* 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)
if (ka->key[i].k && ka->key[i].k != s)
bwsfree(ka->key[i].k);
memset(ka, 0, keys_array_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 = &(ka->key[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) {
struct key_value *kv;
kv = &(si->ka.key[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;
pos_end = 0;
next_field_start = 0;
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 sort_mods *sm;
int res = 0;
for (size_t i = 0; i < keys_num; ++i) {
sm = &(keys[i].sm);
if (sm->rflag)
res = sm->func(&(ps2->key[i]), &(ps1->key[i]), offset);
else
res = sm->func(&(ps1->key[i]), &(ps2->key[i]), 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;
cmp_res = 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 (d2 > 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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