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Add a BSD-licensed sort rewrite that was started by me and later completed

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with the major functionality and optimizations by Oleg Moskalenko.
It is compatible with the latest version of POSIX and the current GNU sort
version that we have in base.  Beside this, it implements all the
functionality introduced in later versions of GNU sort.  For now, it will
be installed as "bsdsort", keeping GNU sort as the default sort
implementation.
This commit is contained in:
Gabor Kovesdan 2012-05-11 12:37:16 +00:00
parent fdbe55fccb
commit c66bbc9143
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=235267
18 changed files with 7795 additions and 0 deletions
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45
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# $FreeBSD$
.include <bsd.own.mk>
.if ${MK_BSD_SORT} == "yes"
PROG= sort
.else
PROG= bsdsort
CLEANFILES+= bsdsort.1
bsdsort.1: sort.1
cp ${.ALLSRC} ${.TARGET}
.endif
SRCS= bwstring.c coll.c file.c mem.c radixsort.c sort.c vsort.c
WARNS= 6
sort.1: sort.1.in
/usr/bin/sed ${MAN_SUB} ${.ALLSRC} >${.TARGET}
CLEANFILES+= sort.1
.if !defined(WITHOUT_THREADS)
CFLAGS+= -DSORT_THREADS
LDFLAGS+= -lpthread -lmd
MAN_SUB+= -e 's|%%THREADS%%||g'
.else
LDFLAGS+= -lmd
MAN_SUB+= -e 's|%%THREADS%%|\.\\"|g'
.endif
.if !defined(WITHOUT_NLS)
NLS+= hu_HU.ISO8859-2
NLSSRCFILES= ${NLS:S@$@.msg@}
MAN_SUB+= -e 's|%%NLS%%||g'
.for lang in ${NLS}
NLSSRCDIR_${lang}= ${.CURDIR}/nls
.endfor
.else
CFLAGS+= -DWITHOUT_NLS
MAN_SUB+= -e 's|%%THREADS%%|\.\\"|g'
.endif
.include <bsd.prog.mk>

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/* $FreeBSD$ */
/*-
* Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.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.
*/
#if !defined(__BWSTRING_H__)
#define __BWSTRING_H__
#include <stdbool.h>
#include <stdio.h>
#include <errno.h>
#include <sysexits.h>
#include <wchar.h>
#include "mem.h"
extern bool byte_sort;
/* wchar_t is of 4 bytes: */
#define SIZEOF_WCHAR_STRING(LEN) ((LEN)*sizeof(wchar_t))
/*
* Binary "wide" string
*/
struct bwstring
{
size_t len;
union
{
wchar_t wstr[0];
unsigned char cstr[0];
} data;
};
struct reader_buffer
{
wchar_t *fgetwln_z_buffer;
size_t fgetwln_z_buffer_size;
};
typedef void *bwstring_iterator;
#define BWSLEN(s) ((s)->len)
struct bwstring *bwsalloc(size_t sz);
size_t bwsrawlen(const struct bwstring *bws);
const void* bwsrawdata(const struct bwstring *bws);
void bws_setlen(struct bwstring *bws, size_t newlen);
size_t bws_memsize(const struct bwstring *bws);
double bwstod(struct bwstring *s0, bool *empty);
int bws_month_score(const struct bwstring *s0);
struct bwstring *ignore_leading_blanks(struct bwstring *str);
struct bwstring *ignore_nonprinting(struct bwstring *str);
struct bwstring *dictionary_order(struct bwstring *str);
struct bwstring *ignore_case(struct bwstring *str);
void bwsprintf(FILE*, struct bwstring*, const char *prefix, const char *suffix);
void bws_disorder_warnx(struct bwstring *s, const char *fn, size_t pos);
struct bwstring *bwsdup(const struct bwstring *s);
struct bwstring *bwssbdup(const wchar_t *str, size_t size);
struct bwstring *bwscsbdup(const unsigned char *str, size_t size);
void bwsfree(const struct bwstring *s);
size_t bwscpy(struct bwstring *dst, const struct bwstring *src);
struct bwstring *bwsncpy(struct bwstring *dst, const struct bwstring *src, size_t size);
struct bwstring *bwsnocpy(struct bwstring *dst, const struct bwstring *src, size_t offset, size_t size);
int bwscmp(const struct bwstring *bws1, const struct bwstring *bws2, size_t offset);
int bwsncmp(const struct bwstring *bws1, const struct bwstring *bws2, size_t offset, size_t len);
int bwscoll(const struct bwstring *bws1, const struct bwstring *bws2, size_t offset);
int bwsfwrite(struct bwstring *bws, FILE *f, bool zero_ended);
struct bwstring *bwsfgetln(FILE *file, size_t *len, bool zero_ended, struct reader_buffer *rb);
static inline bwstring_iterator
bws_begin(struct bwstring *bws)
{
return (bwstring_iterator) (&(bws->data));
}
static inline bwstring_iterator
bws_end(struct bwstring *bws)
{
return ((MB_CUR_MAX == 1) ?
(bwstring_iterator) (bws->data.cstr + bws->len) :
(bwstring_iterator) (bws->data.wstr + bws->len));
}
static inline bwstring_iterator
bws_iterator_inc(bwstring_iterator iter, size_t pos)
{
if (MB_CUR_MAX == 1)
return ((unsigned char *) iter) + pos;
else
return ((wchar_t*) iter) + pos;
}
static inline wchar_t
bws_get_iter_value(bwstring_iterator iter)
{
if (MB_CUR_MAX == 1)
return *((unsigned char *) iter);
else
return *((wchar_t*) iter);
}
int
bws_iterator_cmp(bwstring_iterator iter1, bwstring_iterator iter2, size_t len);
#define BWS_GET(bws, pos) ((MB_CUR_MAX == 1) ? ((bws)->data.cstr[(pos)]) : (bws)->data.wstr[(pos)])
void initialise_months(void);
#endif /* __BWSTRING_H__ */

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/* $FreeBSD$ */
/*-
* Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.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.
*/
#if !defined(__COLL_H__)
#define __COLL_H__
#include "bwstring.h"
#include "sort.h"
/*
* Sort hint data for -n
*/
struct n_hint
{
unsigned long long n1;
unsigned char si;
bool empty;
bool neg;
};
/*
* Sort hint data for -g
*/
struct g_hint
{
double d;
bool nan;
bool notnum;
};
/*
* Sort hint data for -M
*/
struct M_hint
{
int m;
};
/*
* Status of a sort hint object
*/
typedef enum
{
HS_ERROR = -1, HS_UNINITIALIZED = 0, HS_INITIALIZED = 1
} hint_status;
/*
* Sort hint object
*/
struct key_hint
{
hint_status status;
union
{
struct n_hint nh;
struct g_hint gh;
struct M_hint Mh;
} v;
};
/*
* Key value
*/
struct key_value
{
struct bwstring *k; /* key string */
struct key_hint hint[0]; /* key sort hint */
};
/*
* Set of keys container object.
*/
struct keys_array
{
struct key_value key[0];
};
/*
* Parsed -k option data
*/
struct key_specs
{
struct sort_mods sm;
size_t c1;
size_t c2;
size_t f1;
size_t f2;
bool pos1b;
bool pos2b;
};
/*
* Single entry in sort list.
*/
struct sort_list_item
{
struct bwstring *str;
struct keys_array ka;
};
/*
* Function type, used to compare two list objects
*/
typedef int (*listcoll_t)(struct sort_list_item **ss1, struct sort_list_item **ss2);
extern struct key_specs *keys;
extern size_t keys_num;
/*
* Main localised symbols
*/
extern wchar_t symbol_decimal_point;
extern wchar_t symbol_thousands_sep;
extern wchar_t symbol_negative_sign;
extern wchar_t symbol_positive_sign;
/* funcs */
cmpcoll_t get_sort_func(struct sort_mods *sm);
struct keys_array *keys_array_alloc(void);
size_t keys_array_size(void);
void set_key_on_keys_array(struct keys_array *ka, struct bwstring *s, size_t ind);
void clean_keys_array(const struct bwstring *s, struct keys_array *ka);
struct sort_list_item *sort_list_item_alloc(void);
void sort_list_item_set(struct sort_list_item *si, struct bwstring *str);
void sort_list_item_clean(struct sort_list_item *si);
size_t sort_list_item_size(struct sort_list_item *si);
int preproc(struct bwstring *s, struct keys_array *ka);
int top_level_str_coll(const struct bwstring *, const struct bwstring *);
int key_coll(struct keys_array *ks1, struct keys_array *ks2, size_t offset);
int str_list_coll(struct bwstring *str1, struct sort_list_item **ss2);
int list_coll_by_str_only(struct sort_list_item **ss1, struct sort_list_item **ss2);
int list_coll(struct sort_list_item **ss1, struct sort_list_item **ss2);
int list_coll_offset(struct sort_list_item **ss1, struct sort_list_item **ss2, size_t offset);
listcoll_t get_list_call_func(size_t offset);
#endif /* __COLL_H__ */

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/* $FreeBSD$ */
/*-
* Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.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.
*/
#if !defined(__SORT_FILE_H__)
#define __SORT_FILE_H__
#include "coll.h"
#include "sort.h"
#define SORT_DEFAULT 0
#define SORT_QSORT 1
#define SORT_MERGESORT 2
#define SORT_HEAPSORT 3
#define SORT_RADIXSORT 4
/*
* List of data to be sorted.
*/
struct sort_list
{
struct sort_list_item **list;
unsigned long long memsize;
size_t count;
size_t size;
size_t sub_list_pos;
};
/*
* File reader object
*/
struct file_reader;
/*
* List of files to be sorted
*/
struct file_list
{
char **fns;
int count;
int sz;
bool tmp;
};
/*
* Structure for zero-separated file reading (for input files list)
*/
struct file0_reader
{
char *current_line;
FILE *f;
size_t current_sz;
};
/* memory */
/**/
extern unsigned long long free_memory;
extern unsigned long long available_free_memory;
/* temporary file dir */
extern const char *tmpdir;
/*
* Max number of simultaneously open files (including the output file).
*/
extern size_t max_open_files;
/*
* Compress program
*/
extern const char* compress_program;
/* funcs */
struct file_reader *file_reader_init(const char *fsrc);
struct bwstring *file_reader_readline(struct file_reader *fr);
void file_reader_free(struct file_reader *fr);
char *read_file0_line(struct file0_reader *f0r);
void init_tmp_files(void);
void clear_tmp_files(void);
char *new_tmp_file_name(void);
void tmp_file_atexit(const char *tmp_file);
void file_list_init(struct file_list *fl, bool tmp);
void file_list_add(struct file_list *fl, char *fn, bool allocate);
void file_list_populate(struct file_list *fl, int argc, char **argv, bool allocate);
void file_list_clean(struct file_list *fl);
int check(const char *);
void merge_files(struct file_list *fl, const char *fn_out);
FILE *openfile(const char *, const char *);
void closefile(FILE *, const char *);
int procfile(const char *fn, struct sort_list *list, struct file_list *fl);
void sort_list_init(struct sort_list *l);
void sort_list_add(struct sort_list *l, struct bwstring *str);
void sort_list_clean(struct sort_list *l);
void sort_list_dump(struct sort_list *l, const char *fn);
void sort_list_to_file(struct sort_list *list, const char *outfile);
#endif /* __SORT_FILE_H__ */

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/*-
* Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.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 <err.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "mem.h"
/*
* malloc() wrapper.
*/
void *
sort_malloc(size_t size)
{
void *ptr;
if ((ptr = malloc(size)) == NULL)
err(2, NULL);
return (ptr);
}
/*
* free() wrapper.
*/
void
sort_free(const void *ptr)
{
if (ptr)
free(__DECONST(void *, ptr));
}
/*
* realloc() wrapper.
*/
void *
sort_realloc(void *ptr, size_t size)
{
if ((ptr = realloc(ptr, size)) == NULL)
err(2, NULL);
return (ptr);
}
char *
sort_strdup(const char *str)
{
char *dup;
if ((dup = strdup(str)) == NULL)
err(2, NULL);
return (dup);
}

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/* $FreeBSD$ */
/*-
* Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.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.
*/
#if !defined(__SORT_MEM_H__)
#define __SORT_MEM_H__
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
/*
* mem.c
*/
void *sort_malloc(size_t);
void sort_free(const void *ptr);
void *sort_realloc(void *, size_t);
char *sort_strdup(const char *);
#endif /* __SORT_MEM_H__ */

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$ $FreeBSD$
$
$set 1
$quote "
1 "you cannot use -%c and -%c together"
2 "extra argument not allowed with -c"
3 "Unknown feature: %s\n"
4 "Wrong memory buffer specification"
5 "0 field in key specs\n"
6 "0 column in key specs\n"

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$ $FreeBSD$
$
$set 1
$quote "
1 "a -%c és -%c opciók nem használhatók együtt"
2 "extra argumentum a -%c opcióval"
3 "Ismeretlen funkció: %s\n"
4 "Rossz memória puffer érték"
5 "0 mező a kulcsspecifikációban\n"
6 "0 oszlop a kulcsspecifikációban\n"

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/*-
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.com>
* Copyright (C) 2012 Gabor Kovesdan <gabor@FreeBSD.org>
* 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 <errno.h>
#include <err.h>
#include <langinfo.h>
#include <math.h>
#if defined(SORT_THREADS)
#include <pthread.h>
#include <semaphore.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include <unistd.h>
#include "coll.h"
#include "radixsort.h"
#define TINY_NODE(sl) ((sl)->tosort_num < 65)
#define SMALL_NODE(sl) ((sl)->tosort_num < 5)
/* are we sorting in reverse order ? */
static bool reverse_sort = false;
/* sort sub-levels array size */
static const size_t slsz = 256 * sizeof(struct sort_level*);
/* one sort level structure */
struct sort_level
{
struct sort_level **sublevels;
struct sort_list_item **leaves;
struct sort_list_item **sorted;
struct sort_list_item **tosort;
size_t leaves_num;
size_t leaves_sz;
size_t level;
size_t real_sln;
size_t start_position;
size_t sln;
size_t tosort_num;
size_t tosort_sz;
};
/* stack of sort levels ready to be sorted */
struct level_stack {
struct level_stack *next;
struct sort_level *sl;
};
static struct level_stack *g_ls = NULL;
#if defined(SORT_THREADS)
/* stack guarding mutex */
static pthread_mutex_t g_ls_mutex;
/* counter: how many items are left */
static size_t sort_left = 0;
/* guarding mutex */
static pthread_mutex_t sort_left_mutex;
/* semaphore to count threads */
static sem_t mtsem;
/*
* Decrement items counter
*/
static inline void
sort_left_dec(size_t n)
{
pthread_mutex_lock(&sort_left_mutex);
sort_left -= n;
pthread_mutex_unlock(&sort_left_mutex);
}
/*
* Do we have something to sort ?
*/
static inline bool
have_sort_left(void)
{
bool ret;
pthread_mutex_lock(&sort_left_mutex);
ret = (sort_left > 0);
pthread_mutex_unlock(&sort_left_mutex);
return (ret);
}
#else
#define sort_left_dec(n)
#endif /* SORT_THREADS */
/*
* Push sort level to the stack
*/
static inline void
push_ls(struct sort_level* sl)
{
struct level_stack *new_ls;
new_ls = sort_malloc(sizeof(struct level_stack));
new_ls->sl = sl;
#if defined(SORT_THREADS)
if (nthreads > 1)
pthread_mutex_lock(&g_ls_mutex);
#endif
new_ls->next = g_ls;
g_ls = new_ls;
#if defined(SORT_THREADS)
if (nthreads > 1)
pthread_mutex_unlock(&g_ls_mutex);
#endif
}
/*
* Pop sort level from the stack (single-threaded style)
*/
static inline struct sort_level*
pop_ls_st(void)
{
struct sort_level *sl;
if (g_ls) {
struct level_stack *saved_ls;
sl = g_ls->sl;
saved_ls = g_ls;
g_ls = g_ls->next;
sort_free(saved_ls);
} else
sl = NULL;
return (sl);
}
/*
* Pop sort level from the stack (multi-threaded style)
*/
static inline struct sort_level*
pop_ls_mt(void)
{
struct level_stack *saved_ls;
struct sort_level *sl;
#if defined(SORT_THREADS)
pthread_mutex_lock(&g_ls_mutex);
#endif
if (g_ls) {
sl = g_ls->sl;
saved_ls = g_ls;
g_ls = g_ls->next;
} else {
sl = NULL;
saved_ls = NULL;
}
#if defined(SORT_THREADS)
pthread_mutex_unlock(&g_ls_mutex);
#endif
sort_free(saved_ls);
return (sl);
}
static void
add_to_sublevel(struct sort_level *sl, struct sort_list_item *item, int indx)
{
struct sort_level *ssl;
ssl = sl->sublevels[indx];
if (ssl == NULL) {
ssl = sort_malloc(sizeof(struct sort_level));
memset(ssl, 0, sizeof(struct sort_level));
ssl->level = sl->level + 1;
sl->sublevels[indx] = ssl;
++(sl->real_sln);
}
if (++(ssl->tosort_num) > ssl->tosort_sz) {
ssl->tosort_sz = ssl->tosort_num + 128;
ssl->tosort = sort_realloc(ssl->tosort,
sizeof(struct sort_list_item*) * (ssl->tosort_sz));
}
ssl->tosort[ssl->tosort_num - 1] = item;
}
static inline void
add_leaf(struct sort_level *sl, struct sort_list_item *item)
{
if (++(sl->leaves_num) > sl->leaves_sz) {
sl->leaves_sz = sl->leaves_num + 128;
sl->leaves = sort_realloc(sl->leaves,
(sizeof(struct sort_list_item*) * (sl->leaves_sz)));
}
sl->leaves[sl->leaves_num - 1] = item;
}
static inline int
get_wc_index(struct sort_list_item *sli, size_t level)
{
const struct bwstring *bws;
bws = sli->ka.key[0].k;
if ((BWSLEN(bws) > level))
return (unsigned char) BWS_GET(bws,level);
return (-1);
}
static void
place_item(struct sort_level *sl, size_t item)
{
struct sort_list_item *sli;
int c;
sli = sl->tosort[item];
c = get_wc_index(sli, sl->level);
if (c == -1)
add_leaf(sl, sli);
else
add_to_sublevel(sl, sli, c);
}
static void
free_sort_level(struct sort_level *sl)
{
if (sl) {
if (sl->leaves)
sort_free(sl->leaves);
if (sl->level > 0)
sort_free(sl->tosort);
if (sl->sublevels) {
struct sort_level *slc;
size_t sln;
sln = sl->sln;
for (size_t i = 0; i < sln; ++i) {
slc = sl->sublevels[i];
if (slc)
free_sort_level(slc);
}
sort_free(sl->sublevels);
}
sort_free(sl);
}
}
static void
run_sort_level_next(struct sort_level *sl)
{
struct sort_level *slc;
size_t i, sln, tosort_num;
if (sl->sublevels) {
sort_free(sl->sublevels);
sl->sublevels = NULL;
}
switch (sl->tosort_num){
case 0:
goto end;
case (1):
sl->sorted[sl->start_position] = sl->tosort[0];
sort_left_dec(1);
goto end;
case (2):
if (list_coll_offset(&(sl->tosort[0]), &(sl->tosort[1]),
sl->level) > 0) {
sl->sorted[sl->start_position++] = sl->tosort[1];
sl->sorted[sl->start_position] = sl->tosort[0];
} else {
sl->sorted[sl->start_position++] = sl->tosort[0];
sl->sorted[sl->start_position] = sl->tosort[1];
}
sort_left_dec(2);
goto end;
default:
if (TINY_NODE(sl) || (sl->level > 15)) {
listcoll_t func;
func = get_list_call_func(sl->level);
sl->leaves = sl->tosort;
sl->leaves_num = sl->tosort_num;
sl->leaves_sz = sl->leaves_num;
sl->leaves = sort_realloc(sl->leaves,
(sizeof(struct sort_list_item *) *
(sl->leaves_sz)));
sl->tosort = NULL;
sl->tosort_num = 0;
sl->tosort_sz = 0;
sl->sln = 0;
sl->real_sln = 0;
if (sort_opts_vals.sflag) {
if (mergesort(sl->leaves, sl->leaves_num,
sizeof(struct sort_list_item *),
(int(*)(const void *, const void *)) func) == -1)
/* NOTREACHED */
err(2, "Radix sort error 3");
} else
qsort(sl->leaves, sl->leaves_num,
sizeof(struct sort_list_item *),
(int(*)(const void *, const void *)) func);
memcpy(sl->sorted + sl->start_position,
sl->leaves, sl->leaves_num *
sizeof(struct sort_list_item*));
sort_left_dec(sl->leaves_num);
goto end;
} else {
sl->tosort_sz = sl->tosort_num;
sl->tosort = sort_realloc(sl->tosort,
sizeof(struct sort_list_item*) * (sl->tosort_sz));
}
}
sl->sln = 256;
sl->sublevels = sort_malloc(slsz);
memset(sl->sublevels, 0, slsz);
sl->real_sln = 0;
tosort_num = sl->tosort_num;
for (i = 0; i < tosort_num; ++i)
place_item(sl, i);
sort_free(sl->tosort);
sl->tosort = NULL;
sl->tosort_num = 0;
sl->tosort_sz = 0;
if (sl->leaves_num > 1) {
if (keys_num > 1) {
if (sort_opts_vals.sflag) {
mergesort(sl->leaves, sl->leaves_num,
sizeof(struct sort_list_item *),
(int(*)(const void *, const void *)) list_coll);
} else {
qsort(sl->leaves, sl->leaves_num,
sizeof(struct sort_list_item *),
(int(*)(const void *, const void *)) list_coll);
}
} else if (!sort_opts_vals.sflag && sort_opts_vals.complex_sort) {
qsort(sl->leaves, sl->leaves_num,
sizeof(struct sort_list_item *),
(int(*)(const void *, const void *)) list_coll_by_str_only);
}
}
sl->leaves_sz = sl->leaves_num;
sl->leaves = sort_realloc(sl->leaves, (sizeof(struct sort_list_item *) *
(sl->leaves_sz)));
if (!reverse_sort) {
memcpy(sl->sorted + sl->start_position, sl->leaves,
sl->leaves_num * sizeof(struct sort_list_item*));
sl->start_position += sl->leaves_num;
sort_left_dec(sl->leaves_num);
sort_free(sl->leaves);
sl->leaves = NULL;
sl->leaves_num = 0;
sl->leaves_sz = 0;
sln = sl->sln;
for (i = 0; i < sln; ++i) {
slc = sl->sublevels[i];
if (slc) {
slc->sorted = sl->sorted;
slc->start_position = sl->start_position;
sl->start_position += slc->tosort_num;
if (SMALL_NODE(slc))
run_sort_level_next(slc);
else
push_ls(slc);
sl->sublevels[i] = NULL;
}
}
} else {
size_t n;
sln = sl->sln;
for (i = 0; i < sln; ++i) {
n = sln - i - 1;
slc = sl->sublevels[n];
if (slc) {
slc->sorted = sl->sorted;
slc->start_position = sl->start_position;
sl->start_position += slc->tosort_num;
if (SMALL_NODE(slc))
run_sort_level_next(slc);
else
push_ls(slc);
sl->sublevels[n] = NULL;
}
}
memcpy(sl->sorted + sl->start_position, sl->leaves,
sl->leaves_num * sizeof(struct sort_list_item*));
sort_left_dec(sl->leaves_num);
}
end:
free_sort_level(sl);
}
/*
* Single-threaded sort cycle
*/
static void
run_sort_cycle_st(void)
{
struct sort_level *slc;
for (;;) {
slc = pop_ls_st();
if (slc == NULL) {
break;
}
run_sort_level_next(slc);
}
}
#if defined(SORT_THREADS)
/*
* Multi-threaded sort cycle
*/
static void
run_sort_cycle_mt(void)
{
struct sort_level *slc;
for (;;) {
slc = pop_ls_mt();
if (slc == NULL) {
if (have_sort_left()) {
pthread_yield();
continue;
}
break;
}
run_sort_level_next(slc);
}
}
/*
* Sort cycle thread (in multi-threaded mode)
*/
static void*
sort_thread(void* arg)
{
run_sort_cycle_mt();
sem_post(&mtsem);
return (arg);
}
#endif /* defined(SORT_THREADS) */
static void
run_top_sort_level(struct sort_level *sl)
{
struct sort_level *slc;
reverse_sort = sort_opts_vals.kflag ? keys[0].sm.rflag :
default_sort_mods->rflag;
sl->start_position = 0;
sl->sln = 256;
sl->sublevels = sort_malloc(slsz);
memset(sl->sublevels, 0, slsz);
for (size_t i = 0; i < sl->tosort_num; ++i)
place_item(sl, i);
if (sl->leaves_num > 1) {
if (keys_num > 1) {
if (sort_opts_vals.sflag) {
mergesort(sl->leaves, sl->leaves_num,
sizeof(struct sort_list_item *),
(int(*)(const void *, const void *)) list_coll);
} else {
qsort(sl->leaves, sl->leaves_num,
sizeof(struct sort_list_item *),
(int(*)(const void *, const void *)) list_coll);
}
} else if (!sort_opts_vals.sflag && sort_opts_vals.complex_sort) {
qsort(sl->leaves, sl->leaves_num,
sizeof(struct sort_list_item *),
(int(*)(const void *, const void *)) list_coll_by_str_only);
}
}
if (!reverse_sort) {
memcpy(sl->tosort + sl->start_position, sl->leaves,
sl->leaves_num * sizeof(struct sort_list_item*));
sl->start_position += sl->leaves_num;
sort_left_dec(sl->leaves_num);
for (size_t i = 0; i < sl->sln; ++i) {
slc = sl->sublevels[i];
if (slc) {
slc->sorted = sl->tosort;
slc->start_position = sl->start_position;
sl->start_position += slc->tosort_num;
push_ls(slc);
sl->sublevels[i] = NULL;
}
}
} else {
size_t n;
for (size_t i = 0; i < sl->sln; ++i) {
n = sl->sln - i - 1;
slc = sl->sublevels[n];
if (slc) {
slc->sorted = sl->tosort;
slc->start_position = sl->start_position;
sl->start_position += slc->tosort_num;
push_ls(slc);
sl->sublevels[n] = NULL;
}
}
memcpy(sl->tosort + sl->start_position, sl->leaves,
sl->leaves_num * sizeof(struct sort_list_item*));
sort_left_dec(sl->leaves_num);
}
#if defined(SORT_THREADS)
if (nthreads < 2) {
#endif
run_sort_cycle_st();
#if defined(SORT_THREADS)
} else {
size_t i;
for(i = 0; i < nthreads; ++i) {
pthread_attr_t attr;
pthread_t pth;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr,
PTHREAD_DETACHED);
pthread_create(&pth, &attr, sort_thread, NULL);
pthread_attr_destroy(&attr);
}
for(i = 0; i < nthreads; ++i)
sem_wait(&mtsem);
}
#endif /* defined(SORT_THREADS) */
}
static void
run_sort(struct sort_list_item **base, size_t nmemb)
{
struct sort_level *sl;
#if defined(SORT_THREADS)
if (nthreads > 1) {
pthread_mutexattr_t mattr;
pthread_mutexattr_init(&mattr);
pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_ADAPTIVE_NP);
pthread_mutex_init(&g_ls_mutex, &mattr);
pthread_mutex_init(&sort_left_mutex, &mattr);
pthread_mutexattr_destroy(&mattr);
sem_init(&mtsem, 0, 0);
}
#endif
sl = sort_malloc(sizeof(struct sort_level));
memset(sl, 0, sizeof(struct sort_level));
sl->tosort = base;
sl->tosort_num = nmemb;
sl->tosort_sz = nmemb;
#if defined(SORT_THREADS)
sort_left = nmemb;
#endif
run_top_sort_level(sl);
free_sort_level(sl);
#if defined(SORT_THREADS)
if (nthreads > 1) {
sem_destroy(&mtsem);
pthread_mutex_destroy(&g_ls_mutex);
pthread_mutex_destroy(&sort_left_mutex);
}
#endif
}
void
rxsort(struct sort_list_item **base, size_t nmemb)
{
run_sort(base, nmemb);
}

38
usr.bin/sort/radixsort.h Normal file
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@ -0,0 +1,38 @@
/* $FreeBSD$ */
/*-
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.com>
* Copyright (C) 2012 Gabor Kovesdan <gabor@FreeBSD.org>
* 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.
*/
#if !defined(__SORT_RADIX_H__)
#define __SORT_RADIX_H__
#include "coll.h"
#include "sort.h"
void rxsort(struct sort_list_item **base, size_t nmemb);
#endif /* __SORT_RADIX_H__ */

635
usr.bin/sort/sort.1.in Normal file
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@ -0,0 +1,635 @@
.\" $OpenBSD: sort.1,v 1.31 2007/08/21 21:22:37 millert Exp $
.\" $FreeBSD$
.\"
.\" Copyright (c) 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" the Institute of Electrical and Electronics Engineers, Inc.
.\"
.\" 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. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
.\"
.\" @(#)sort.1 8.1 (Berkeley) 6/6/93
.\"
.Dd May 6, 2012
.Dt SORT 1
.Os
.Sh NAME
.Nm sort
.Nd sort or merge records (lines) of text and binary files
.Sh SYNOPSIS
.Nm sort
.Bk -words
.Op Fl bcCdfghiRMmnrsuVz
.Sm off
.Op Fl k\ \& Ar field1 Op , Ar field2
.Sm on
.Op Fl S Ar memsize
.Ek
.Op Fl T Ar dir
.Op Fl t Ar char
.Op Fl o Ar output
.Op Ar file ...
.Nm sort
.Fl Fl help
.Nm sort
.Fl Fl version
.Sh DESCRIPTION
The
.Nm
utility sorts text and binary files by lines.
A line is a record separated from the subsequent record by a
newline (default) or NUL \'\\0\' character (-z option).
A record can contain any printable or unprintable characters.
Comparisons are based on one or more sort keys extracted from
each line of input, and are performed lexicographically,
according to the current locale's collating rules and the
specified command-line options that can tune the actual
sorting behavior.
By default, if keys are not given,
.Nm
uses entire lines for comparison.
.Pp
The command line options are as follows:
.Bl -tag -width Ds
.It Fl c, Fl Fl check, Fl C, Fl Fl check=silent|quiet
Check that the single input file is sorted.
If the file is not sorted,
.Nm
produces the appropriate error messages and exits with code 1,
otherwise returns 0.
If
.Fl C
or
.Fl Fl check=silent
is specified,
.Nm
produces no output.
This is a "silent" version of
.Fl c.
.It Fl m , Fl Fl merge
Merge only.
The input files are assumed to be pre-sorted.
If they are not sorted the output order is undefined.
.It Fl o Ar output , Fl Fl output Ns = Ns Ar output
Print the output to the
.Ar output
file instead of the standard output.
.It Fl S Ar size, Fl Fl buffer-size Ns = Ns Ar size
Use
.Ar size
for the maximum size of the memory buffer.
Size modifiers %,b,K,M,G,T,P,E,Z,Y can be used.
If a memory limit is not explicitly specified,
.Nm
takes up to about 90% of available memory.
If the file size is too big to fit into the memory buffer,
the temporary disk files are used to perform the sorting.
.It Fl T Ar dir , Fl Fl temporary-directory Ns = Ns Ar dir
Store temporary files in the directory
.Ar dir .
The default path is the value of the environment variable
.Ev TMPDIR
or
.Pa /var/tmp
if
.Ev TMPDIR
is not defined.
.It Fl u , Fl Fl unique
Unique keys.
Suppress all lines that have a key that is equal to an already
processed one.
This option, similarly to
.Fl s ,
implies a stable sort.
If used with
.Fl c
or
.Fl C ,
.Nm
also checks that there are no lines with duplicate keys.
.It Fl s
Stable sort.
This option maintains the original record order of records that have
and equal key.
This is a non-standard feature, but it is widely accepted and used.
.It Fl Fl version
Print the version and silently exits.
.It Fl Fl help
Print the help text and silently exits.
.El
.Pp
The following options override the default ordering rules.
When ordering options appear independently of key field
specifications, they apply globally to all sort keys.
When attached to a specific key (see
.Fl k ) ,
the ordering options override all global ordering options for
the key they are attahced to.
.Bl -tag -width indent
.It Fl b, Fl Fl ignore-leading-blanks
Ignore leading blank characters when comparing lines.
.It Fl d , Fl Fl dictionary-order
Consider only blank spaces and alphanumeric characters in comparisons.
.It Fl f , Fl Fl ignore-case
Convert all lowercase characters to their uppercase equivalent
before comparison, that is, perform case-independent sorting.
.It Fl g, Fl Fl general-numeric-sort, Fl Fl sort=general-numeric
Sort by general numerical value.
As opposed to
.Fl n ,
this option handles general floating points, which have a much
permissive format than those allowed by
. Fl n ,
but it has a significant performance drawback.
.It Fl h, Fl Fl human-numeric-sort, Fl Fl sort=human-numeric
Sort by numerical value, but take into account the SI suffix,
if present.
Sort first by numeric sign (negative, zero, or
positive); then by SI suffix (either empty, or `k' or `K', or one
of `MGTPEZY', in that order); and finally by numeric value.
The SI suffix must immediately follow the number.
For example, '12345K' sorts before '1M', because M is "larger" than K.
This sort option is useful for sorting the output of a single invocation
of 'df' command with
.Fl h
or
.Fl H
options (human-readable).
.It Fl i , Fl Fl ignore-nonprinting
Ignore all non-printable characters.
.It Fl M, Fl Fl month-sort, Fl Fl sort=month
Sort by month abbreviations.
Unknown strings are considered smaller than the month names.
.It Fl n , Fl Fl numeric-sort, Fl Fl sort=numeric
Sort fields numerically by arithmetic value.
Fields are supposed to have optional blanks in the beginning, an
optional minus sign, zero or more digits (including decimal point and
possible thousand separators).
.It Fl R, Fl Fl random-sort, Fl Fl sort=random
Sort by a random order.
This is a random permutation of the inputs except that
the equal keys sort together.
It is implemented by hashing the input keys and sorting
the hash values.
The hash function is choosen randomly.
The hash function is randomized by
.Cm /dev/random
content, or by file content if it is specified by
.Fl Fl random-source .
Even if multiple sort fields are specified,
the same random hash function is used for all of them.
.It Fl r , Fl Fl reverse
Sort in reverse order.
.It Fl V, Fl Fl version-sort
Sort version numbers.
The input lines are treated as file names in form
PREFIX VERSION SUFFIX, where SUFFIX matches the regular expression
"(\.([A-Za-z~][A-Za-z0-9~]*)?)*".
The files are compared by their prefixes and versions (leading
zeros are ignored in version numbers, see example below).
If an input string does not match the pattern, then it is compared
using the byte compare function.
All string comparisions are performed in C locale, the locale
environment setting is ignored.
.Bl -tag -width indent
.It Example:
.It $ ls sort* | sort -V
.It sort-1.022.tgz
.It sort-1.23.tgz
.It sort-1.23.1.tgz
.It sort-1.024.tgz
.It sort-1.024.003.
.It sort-1.024.003.tgz
.It sort-1.024.07.tgz
.It sort-1.024.009.tgz
.El
.El
.Pp
The treatment of field separators can be altered using these options:
.Bl -tag -width indent
.It Fl b , Fl Fl ignore-leading-blanks
Ignore leading blank space when determining the start
and end of a restricted sort key (see
.Fl k
).
If
.Fl b
is specified before the first
.Fl k
option, it applies globally to all key specifications.
Otherwise,
.Fl b
can be attached independently to each
.Ar field
argument of the key specifications.
.Fl b .
.It Xo
.Sm off
.Fl k\ \& Ar field1 Op , Ar field2 , Fl Fl key Ns = Ns Ar field1 Op , Ar field2
.Sm on
.Xc
Define a restricted sort key that has the starting position
.Ar field1 ,
and optional ending position
.Ar field2
of a key field.
The
.Fl k
option may be specified multiple times,
in which case subsequent keys are compared when earlier keys compare equal.
The
.Fl k
option replaces the obsolete options
.Cm \(pl Ns Ar pos1
and
.Fl Ns Ar pos2 ,
but the old notation is also supported.
.It Fl t Ar char , Fl Fl field-separator Ns = Ns Ar char
Use
.Ar char
as a field separator character.
The initial
.Ar char
is not considered to be part of a field when determining key offsets.
Each occurrence of
.Ar char
is significant (for example,
.Dq Ar charchar
delimits an empty field).
If
.Fl t
is not specified, the default field separator is a sequence of
blank space characters, and consecutive blank spaces do
.Em not
delimit an empty field, however, the initial blank space
.Em is
considered part of a field when determining key offsets.
To use NUL as field separator, use
.Fl t
\'\\0\'.
.It Fl z , Fl Fl zero-terminated
Use NUL as record separator.
By default, records in the files are supposed to be separated by
the newline characters.
With this option, NUL (\'\\0\') is used as a record separator character.
.El
.Pp
Other options:
.Bl -tag -width indent
.It Fl Fl batch-size Ns = Ns Ar num
Specify maximum number of files that can be opened by
.Nm
at once.
This option affects behavior when having many input files or using
temporary files.
The default value is 16.
.It Fl Fl compress-program Ns = Ns Ar PROGRAM
Use PROGRAM to compress temporary files.
PROGRAM must compress standard input to standard output, when called
without arguments.
When called with argument
.Fl d
it must decompress standard input to standard output.
If PROGRAM fails,
.Nm
must exit with error.
An example of PROGRAM that can be used here is bzip2.
.It Fl Fl random-source Ns = Ns Ar filename
In random sort, the file content is used as the source of the 'seed' data
for the hash function choice.
Two invocations of random sort with the same seed data will use
the same hash function and will produce the same result if the input is
also identical.
By default, file
.Cm /dev/random
is used.
.It Fl Fl debug
Print some extra information about the sorting process to the
standard output.
%%THREADS%%.It Fl Fl nthreads
%%THREADS%%Set the maximum number of execution threads.
%%THREADS%%Default number equals to the number of CPUs.
.It Fl Fl files0-from Ns = Ns Ar filename
Take the input file list from the file
.Ar filename.
The file names must be separated by NUL
(like the output produced by the command "find ... -print0").
.It Fl Fl radixsort
Try to use radix sort, if the sort specifications allow.
The radix sort can only be used for trivial locales (C and POSIX),
and it cannot be used for numeric or month sort.
Radix sort is very fast and stable.
.It Fl Fl mergesort
Use mergesort.
This is a universal algorithm that can always be used,
but it is not always the fastest.
.It Fl Fl qsort
Try to use quick sort, if the sort specifications allow.
This sort algorithm cannot be used with
.Fl u
and
.Fl s .
.It Fl Fl heapsort
Try to use heap sort, if the sort specifications allow.
This sort algorithm cannot be used with
.Fl u
and
.Fl s .
.El
.Pp
The following operands are available:
.Bl -tag -width indent
.It Ar file
The pathname of a file to be sorted, merged, or checked.
If no
.Ar file
operands are specified, or if a
.Ar file
operand is
.Fl ,
the standard input is used.
.El
.Pp
A field is defined as a maximal sequence of characters other than the
field separator and record separator (newline by default).
Initial blank spaces are included in the field unless
.Fl b
has been specified;
the first blank space of a sequence of blank spaces acts as the field
separator and is included in the field (unless
.Fl t
is specified).
For example, all blank spaces at the beginning of a line are
considered to be part of the first field.
.Pp
Fields are specified by the
.Sm off
.Fl k\ \& Ar field1 Op , Ar field2
.Sm on
command-line option.
If
.Ar field2
is missing, the end of the key defaults to the end of the line.
.Pp
The arguments
.Ar field1
and
.Ar field2
have the form
.Em m.n
.Em (m,n > 0)
and can be followed by one or more of the modifiers
.Cm b , d , f , i ,
.Cm n , g , M
and
.Cm r ,
which correspond to the options discussed above.
When
.Cm b
is specified it applies only to
.Ar field1
or
.Ar field2
where it is specified while the rest of the modifiers
apply to the whole key field regardless if they are
specified only with
.Ar field1
or
.Ar field2
or both.
A
.Ar field1
position specified by
.Em m.n
is interpreted as the
.Em n Ns th
character from the beginning of the
.Em m Ns th
field.
A missing
.Em \&.n
in
.Ar field1
means
.Ql \&.1 ,
indicating the first character of the
.Em m Ns th
field; if the
.Fl b
option is in effect,
.Em n
is counted from the first non-blank character in the
.Em m Ns th
field;
.Em m Ns \&.1b
refers to the first non-blank character in the
.Em m Ns th
field.
.No 1\&. Ns Em n
refers to the
.Em n Ns th
character from the beginning of the line;
if
.Em n
is greater than the length of the line, the field is taken to be empty.
.Pp
.Em n Ns th
positions are always counted from the field beginning, even if the field
is shorter than the number of specified positions.
Thus, the key can really start from a position in a subsequent field.
.Pp
A
.Ar field2
position specified by
.Em m.n
is interpreted as the
.Em n Ns th
character (including separators) from the beginning of the
.Em m Ns th
field.
A missing
.Em \&.n
indicates the last character of the
.Em m Ns th
field;
.Em m
= \&0
designates the end of a line.
Thus the option
.Fl k Ar v.x,w.y
is synonymous with the obsolete option
.Cm \(pl Ns Ar v-\&1.x-\&1
.Fl Ns Ar w-\&1.y ;
when
.Em y
is omitted,
.Fl k Ar v.x,w
is synonymous with
.Cm \(pl Ns Ar v-\&1.x-\&1
.Fl Ns Ar w\&.0 .
The obsolete
.Cm \(pl Ns Ar pos1
.Fl Ns Ar pos2
option is still supported, except for
.Fl Ns Ar w\&.0b ,
which has no
.Fl k
equivalent.
.Sh EXIT STATUS
The
.Nm
utility shall exit with one of the following values:
.Pp
.Bl -tag -width flag -compact
.It 0
Successfully sorted the input files or if used with
.Fl c
or
.Fl C ,
the input file already met the sorting criteria.
.It 1
On disorder (or non-uniqueness) with the
.Fl c
or
.Fl C
options.
.It 2
An error occurred.
.El
.Sh ENVIRONMENT
.Bl -tag -width Fl
.It Ev LC_COLLATE
Locale settings to be used to determine the collation for
sorting records.
.It Ev LC_CTYPE
Locale settings to be used to case conversion and classification
of characters, that is, which characters are considered
whitespaces, etc.
.It Ev LC_MESSAGES
Locale settings that determine the language of output messages
that
.Nm
prints out.
.It Ev LC_NUMERIC
Locale settings that determine the number format used in numeric sort.
.It Ev LC_TIME
Locale settings that determine the month format used in month sort.
.It Ev LC_ALL
Locale settings that override all of the above locale settings.
This environment variable can be used to set all these settings
to the same value at once.
.It Ev LANG
Used as a last resort to determine different kinds of locale-specific
behavior if neither the respective environment variable, nor
.Ev LC_ALL
are set.
%%NLS%%.It Ev NLSPATH
%%NLS%%Path to NLS catalogs.
.It Ev TMPDIR
Path to the directory in which temporary files will be stored.
Note that
.Ev TMPDIR
may be overridden by the
.Fl T
option.
.It Ev GNUSORT_NUMERIC_COMPATIBILITY
If defined
.Fl t
will not override the locale numeric symbols, that is, thousand
separators and decimal separators.
By default, if we specify
.Fl t
with the same symbol as the thousand separator or decimal point,
the symbol will be treated as the field separator.
Older behavior was less definite; the symbol was treated as both field
separator and numeric separator, simultaneously.
This environment variable enables the old behavior.
.El
.Sh FILES
.Bl -tag -width Pa -compact
.It Pa /var/tmp/.bsdsort.PID.*
Temporary files.
.It Pa /dev/random
Default seed file for the random sort.
.El
.Sh SEE ALSO
.Xr comm 1 ,
.Xr join 1 ,
.Xr uniq 1 .
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2008
specification.
.Pp
The flags
.Op Fl ghRMSsTVz
are extensions to the POSIX specification.
.Pp
All long options are extensions to the specification, some of them are
provided for compatibility with GNU versions and some of them are
own extensions.
.Pp
The old key notations
.Cm \(pl Ns Ar pos1
and
.Fl Ns Ar pos2
come from older versions of
.Nm
and are still supported but their use is highly discouraged.
.Sh HISTORY
A
.Nm
command first appeared in
.At v3 .
.Sh AUTHORS
Gabor Kovesdan <gabor@FreeBSD.org>,
.Pp
Oleg Moskalenko <oleg.moskalenko@citrix.com>
.Sh NOTES
This implementation of
.Nm
has no limits on input line length (other than imposed by available
memory) or any restrictions on bytes allowed within lines.
.Pp
The performance depends highly on locale settings,
efficient choice of sort keys and key complexity.
The fastest sort is with locale C, on whole lines,
with option
.Fl s.
In general, locale C is the fastest, then single-byte
locales follow and multi-byte locales as the slowest but
the correct collation order is always respected.
As for the key specification, the simpler to process the
lines the faster the search will be.
.Pp
When sorting by arithmetic value, using
.Fl n
results in much better performance than
.Fl g
so its use is encouraged
whenever possible.

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/* $FreeBSD$ */
/*-
* Copyright (C) 2009 Gabor Kovesdan <gabor@FreeBSD.org>
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.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.
*/
#if !defined(__BSD_SORT_H__)
#define __BSD_SORT_H__
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <sysexits.h>
#include <wchar.h>
#include <sys/types.h>
#include <md5.h>
#define VERSION "2.3-FreeBSD"
#define UNUSED_ARG(A) do { A=A; } while(0)
#ifdef WITHOUT_NLS
#define getstr(n) nlsstr[n]
#else
#include <nl_types.h>
extern nl_catd catalog;
#define getstr(n) catgets(catalog, 1, n, nlsstr[n])
#endif
extern const char *nlsstr[];
#if defined(SORT_THREADS)
extern size_t ncpu;
extern size_t nthreads;
#endif
/*
* If true, we output some debug information.
*/
extern bool debug_sort;
/*
* MD5 context for random hash function
*/
extern MD5_CTX md5_ctx;
/*
* sort.c
*/
/*
* This structure holds main sort options which are NOT affecting the sort ordering.
*/
struct sort_opts
{
wchar_t field_sep;
int sort_method;
bool cflag;
bool csilentflag;
bool kflag;
bool mflag;
bool sflag;
bool uflag;
bool zflag;
bool tflag;
bool complex_sort;
};
/*
* Key value structure forward declaration
*/
struct key_value;
/*
* Cmp function
*/
typedef int (*cmpcoll_t)(struct key_value *kv1, struct key_value *kv2, size_t offset);
/*
* This structure holds "sort modifiers" - options which are affecting the sort ordering.
*/
struct sort_mods
{
cmpcoll_t func;
bool bflag;
bool dflag;
bool fflag;
bool gflag;
bool iflag;
bool Mflag;
bool nflag;
bool rflag;
bool Rflag;
bool Vflag;
bool hflag;
};
extern bool need_hint;
extern struct sort_opts sort_opts_vals;
extern struct sort_mods * const default_sort_mods;
#endif /* __BSD_SORT_H__ */

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/*-
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.com>
* Copyright (C) 2012 Gabor Kovesdan <gabor@FreeBSD.org>
* 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 <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "sort.h"
#include "vsort.h"
static inline bool
isdigit_clocale(wchar_t c)
{
return (c >= L'0' && c <= L'9');
}
static inline bool
isalpha_clocale(wchar_t c)
{
return ((c >= L'a' && c <= L'z') || (c >= L'A' && c <= L'Z'));
}
static inline bool
isalnum_clocale(wchar_t c)
{
return ((c >= L'a' && c <= L'z') || (c >= L'A' && c <= L'Z') ||
(c >= L'0' && c <= L'9'));
}
/*
* Find string suffix of format: (\.[A-Za-z~][A-Za-z0-9~]*)*$
* Set length of string before suffix.
*/
static void
find_suffix(bwstring_iterator si, bwstring_iterator se, size_t *len)
{
wchar_t c;
size_t clen;
bool expect_alpha, sfx;
sfx = false;
expect_alpha = false;
*len = 0;
clen = 0;
while ((si < se) && (c = bws_get_iter_value(si))) {
if (expect_alpha) {
expect_alpha = false;
if (!isalpha_clocale(c) && (c != L'~'))
sfx = false;
} else if (c == L'.') {
expect_alpha = true;
if (!sfx) {
sfx = true;
*len = clen;
}
} else if (!isalnum_clocale(c) && (c != L'~'))
sfx = false;
si = bws_iterator_inc(si, 1);
++clen;
}
/* This code must be here to make the implementation compatible
* with WORDING of GNU sort documentation.
* But the GNU sort implementation is not following its own
* documentation. GNU sort allows empty file extensions
* (just dot with nothing after); but the regular expression in
* their documentation does not allow empty file extensions.
* We chose to make our implementation compatible with GNU sort
* implementation. If they will ever fix their bug, this code
* must be uncommented. Or they may choose to fix the info page,
* then the code stays commented.
*
if (expect_alpha)
sfx = false;
*/
if (!sfx)
*len = clen;
}
static inline int
cmp_chars(wchar_t c1, wchar_t c2)
{
if (c1 == c2)
return (0);
if (c1 == L'~')
return (-1);
if (c2 == L'~')
return (+1);
if (isdigit_clocale(c1) || !c1)
return ((isdigit_clocale(c2) || !c2) ? 0 : -1);
if (isdigit_clocale(c2) || !c2)
return (+1);
if (isalpha_clocale(c1))
return ((isalpha_clocale(c2)) ? ((int) c1 - (int) c2) : -1);
if (isalpha_clocale(c2))
return (+1);
return ((int) c1 - (int) c2);
}
static int
cmpversions(bwstring_iterator si1, bwstring_iterator se1,
bwstring_iterator si2, bwstring_iterator se2)
{
int cmp, diff;
while ((si1 < se1) || (si2 < se2)) {
diff = 0;
while (((si1 < se1) &&
!isdigit_clocale(bws_get_iter_value(si1))) ||
((si2 < se2) && !isdigit_clocale(bws_get_iter_value(si2)))) {
wchar_t c1, c2;
c1 = (si1 < se1) ? bws_get_iter_value(si1) : 0;
c2 = (si2 < se2) ? bws_get_iter_value(si2) : 0;
cmp = cmp_chars(c1, c2);
if (cmp)
return (cmp);
if (si1 < se1)
si1 = bws_iterator_inc(si1, 1);
if (si2 < se2)
si2 = bws_iterator_inc(si2, 1);
}
while (bws_get_iter_value(si1) == L'0')
si1 = bws_iterator_inc(si1, 1);
while (bws_get_iter_value(si2) == L'0')
si2 = bws_iterator_inc(si2, 1);
while (isdigit_clocale(bws_get_iter_value(si1)) &&
isdigit_clocale(bws_get_iter_value(si2))) {
if (!diff)
diff = ((int)bws_get_iter_value(si1) -
(int)bws_get_iter_value(si2));
si1 = bws_iterator_inc(si1, 1);
si2 = bws_iterator_inc(si2, 1);
}
if (isdigit_clocale(bws_get_iter_value(si1)))
return (1);
if (isdigit_clocale(bws_get_iter_value(si2)))
return (-1);
if (diff)
return (diff);
}
return (0);
}
/*
* Compare two version strings
*/
int
vcmp(struct bwstring *s1, struct bwstring *s2)
{
bwstring_iterator si1, si2;
wchar_t c1, c2;
size_t len1, len2, slen1, slen2;
int cmp_bytes, cmp_res;
if (s1 == s2)
return (0);
cmp_bytes = bwscmp(s1, s2, 0);
if (cmp_bytes == 0)
return (0);
len1 = slen1 = BWSLEN(s1);
len2 = slen2 = BWSLEN(s2);
if (slen1 < 1)
return (-1);
if (slen2 < 1)
return (+1);
si1 = bws_begin(s1);
si2 = bws_begin(s2);
c1 = bws_get_iter_value(si1);
c2 = bws_get_iter_value(si2);
if (c1 == L'.' && (slen1 == 1))
return (-1);
if (c2 == L'.' && (slen2 == 1))
return (+1);
if (slen1 == 2 && c1 == L'.' &&
bws_get_iter_value(bws_iterator_inc(si1, 1)) == L'.')
return (-1);
if (slen2 == 2 && c2 == L'.' &&
bws_get_iter_value(bws_iterator_inc(si2, 1)) == L'.')
return (+1);
if (c1 == L'.' && c2 != L'.')
return (-1);
if (c1 != L'.' && c2 == L'.')
return (+1);
if (c1 == L'.' && c2 == L'.') {
si1 = bws_iterator_inc(si1, 1);
si2 = bws_iterator_inc(si2, 1);
}
find_suffix(si1, bws_end(s1), &len1);
find_suffix(si2, bws_end(s2), &len2);
if ((len1 == len2) && (bws_iterator_cmp(si1, si2, len1) == 0))
return (cmp_bytes);
cmp_res = cmpversions(si1, bws_iterator_inc(si1, len1), si2,
bws_iterator_inc(si2, len2));
if (cmp_res == 0)
cmp_res = cmp_bytes;
return (cmp_res);
}

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/* $FreeBSD$ */
/*-
* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.com>
* Copyright (C) 2012 Gabor Kovesdan <gabor@FreeBSD.org>
* 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.
*/
#if !defined(__VSORT_H__)
#define _VSORT_H__
#include "bwstring.h"
int vcmp(struct bwstring *s1, struct bwstring *s2);
#endif