* Remove files (should have been done on 2002-06-20).
This commit is contained in:
Thomas Fitzsimmons
parent
b18291deb4
commit
3e35e424d7
@ -1,100 +0,0 @@
|
|||||||
/*
|
|
||||||
* bsearch.c
|
|
||||||
* Original Author: G. Haley
|
|
||||||
* Rewritten by: G. Noer
|
|
||||||
*
|
|
||||||
* Searches an array of nmemb members, the initial member of which is pointed
|
|
||||||
* to by base, for a member that matches the object pointed to by key. The
|
|
||||||
* contents of the array shall be in ascending order according to a comparison
|
|
||||||
* function pointed to by compar. The function shall return an integer less
|
|
||||||
* than, equal to or greater than zero if the first argument is considered to be
|
|
||||||
* respectively less than, equal to or greater than the second. Returns a
|
|
||||||
* pointer to the matching member of the array, or a null pointer if no match
|
|
||||||
* is found.
|
|
||||||
*/
|
|
||||||
|
|
||||||
/*
|
|
||||||
FUNCTION
|
|
||||||
<<bsearch>>---binary search
|
|
||||||
|
|
||||||
INDEX
|
|
||||||
bsearch
|
|
||||||
|
|
||||||
ANSI_SYNOPSIS
|
|
||||||
#include <stdlib.h>
|
|
||||||
void *bsearch(const void *<[key]>, const void *<[base]>,
|
|
||||||
size_t <[nmemb]>, size_t <[size]>,
|
|
||||||
int (*<[compar]>)(const void *, const void *));
|
|
||||||
|
|
||||||
TRAD_SYNOPSIS
|
|
||||||
#include <stdlib.h>
|
|
||||||
char *bsearch(<[key]>, <[base]>, <[nmemb]>, <[size]>, <[compar]>)
|
|
||||||
char *<[key]>;
|
|
||||||
char *<[base]>;
|
|
||||||
size_t <[nmemb]>, <[size]>;
|
|
||||||
int (*<[compar]>)();
|
|
||||||
|
|
||||||
DESCRIPTION
|
|
||||||
<<bsearch>> searches an array beginning at <[base]> for any element
|
|
||||||
that matches <[key]>, using binary search. <[nmemb]> is the element
|
|
||||||
count of the array; <[size]> is the size of each element.
|
|
||||||
|
|
||||||
The array must be sorted in ascending order with respect to the
|
|
||||||
comparison function <[compar]> (which you supply as the last argument of
|
|
||||||
<<bsearch>>).
|
|
||||||
|
|
||||||
You must define the comparison function <<(*<[compar]>)>> to have two
|
|
||||||
arguments; its result must be negative if the first argument is
|
|
||||||
less than the second, zero if the two arguments match, and
|
|
||||||
positive if the first argument is greater than the second (where
|
|
||||||
``less than'' and ``greater than'' refer to whatever arbitrary
|
|
||||||
ordering is appropriate).
|
|
||||||
|
|
||||||
RETURNS
|
|
||||||
Returns a pointer to an element of <[array]> that matches <[key]>. If
|
|
||||||
more than one matching element is available, the result may point to
|
|
||||||
any of them.
|
|
||||||
|
|
||||||
PORTABILITY
|
|
||||||
<<bsearch>> is ANSI.
|
|
||||||
|
|
||||||
No supporting OS subroutines are required.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <stdlib.h>
|
|
||||||
|
|
||||||
_PTR
|
|
||||||
_DEFUN (bsearch, (key, base, nmemb, size, compar),
|
|
||||||
_CONST _PTR key _AND
|
|
||||||
_CONST _PTR base _AND
|
|
||||||
size_t nmemb _AND
|
|
||||||
size_t size _AND
|
|
||||||
int _EXFUN ((*compar), (const _PTR, const _PTR)))
|
|
||||||
{
|
|
||||||
_PTR current;
|
|
||||||
size_t lower = 0;
|
|
||||||
size_t upper = nmemb;
|
|
||||||
size_t index;
|
|
||||||
int result;
|
|
||||||
|
|
||||||
if (nmemb == 0 || size == 0)
|
|
||||||
return NULL;
|
|
||||||
|
|
||||||
while (lower < upper)
|
|
||||||
{
|
|
||||||
index = (lower + upper) / 2;
|
|
||||||
current = (_PTR) (((char *) base) + (index * size));
|
|
||||||
|
|
||||||
result = compar (key, current);
|
|
||||||
|
|
||||||
if (result < 0)
|
|
||||||
upper = index;
|
|
||||||
else if (result > 0)
|
|
||||||
lower = index + 1;
|
|
||||||
else
|
|
||||||
return current;
|
|
||||||
}
|
|
||||||
|
|
||||||
return NULL;
|
|
||||||
}
|
|
||||||
|
|
||||||
@ -1,222 +0,0 @@
|
|||||||
/*
|
|
||||||
FUNCTION
|
|
||||||
<<qsort>>---sort an array
|
|
||||||
|
|
||||||
INDEX
|
|
||||||
qsort
|
|
||||||
|
|
||||||
ANSI_SYNOPSIS
|
|
||||||
#include <stdlib.h>
|
|
||||||
void qsort(void *<[base]>, size_t <[nmemb]>, size_t <[size]>,
|
|
||||||
int (*<[compar]>)(const void *, const void *) );
|
|
||||||
|
|
||||||
TRAD_SYNOPSIS
|
|
||||||
#include <stdlib.h>
|
|
||||||
qsort(<[base]>, <[nmemb]>, <[size]>, <[compar]> )
|
|
||||||
char *<[base]>;
|
|
||||||
size_t <[nmemb]>;
|
|
||||||
size_t <[size]>;
|
|
||||||
int (*<[compar]>)();
|
|
||||||
|
|
||||||
DESCRIPTION
|
|
||||||
<<qsort>> sorts an array (beginning at <[base]>) of <[nmemb]> objects.
|
|
||||||
<[size]> describes the size of each element of the array.
|
|
||||||
|
|
||||||
You must supply a pointer to a comparison function, using the argument
|
|
||||||
shown as <[compar]>. (This permits sorting objects of unknown
|
|
||||||
properties.) Define the comparison function to accept two arguments,
|
|
||||||
each a pointer to an element of the array starting at <[base]>. The
|
|
||||||
result of <<(*<[compar]>)>> must be negative if the first argument is
|
|
||||||
less than the second, zero if the two arguments match, and positive if
|
|
||||||
the first argument is greater than the second (where ``less than'' and
|
|
||||||
``greater than'' refer to whatever arbitrary ordering is appropriate).
|
|
||||||
|
|
||||||
The array is sorted in place; that is, when <<qsort>> returns, the
|
|
||||||
array elements beginning at <[base]> have been reordered.
|
|
||||||
|
|
||||||
RETURNS
|
|
||||||
<<qsort>> does not return a result.
|
|
||||||
|
|
||||||
PORTABILITY
|
|
||||||
<<qsort>> is required by ANSI (without specifying the sorting algorithm).
|
|
||||||
*/
|
|
||||||
|
|
||||||
/*-
|
|
||||||
* Copyright (c) 1992, 1993
|
|
||||||
* The Regents of the University of California. 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.
|
|
||||||
* 3. All advertising materials mentioning features or use of this software
|
|
||||||
* must display the following acknowledgement:
|
|
||||||
* This product includes software developed by the University of
|
|
||||||
* California, Berkeley and its contributors.
|
|
||||||
* 4. 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.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <_ansi.h>
|
|
||||||
#include <stdlib.h>
|
|
||||||
|
|
||||||
#ifndef __GNUC__
|
|
||||||
#define inline
|
|
||||||
#endif
|
|
||||||
|
|
||||||
static inline char *med3 _PARAMS((char *, char *, char *, int (*)()));
|
|
||||||
static inline void swapfunc _PARAMS((char *, char *, int, int));
|
|
||||||
|
|
||||||
#define min(a, b) (a) < (b) ? a : b
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
|
|
||||||
*/
|
|
||||||
#define swapcode(TYPE, parmi, parmj, n) { \
|
|
||||||
long i = (n) / sizeof (TYPE); \
|
|
||||||
register TYPE *pi = (TYPE *) (parmi); \
|
|
||||||
register TYPE *pj = (TYPE *) (parmj); \
|
|
||||||
do { \
|
|
||||||
register TYPE t = *pi; \
|
|
||||||
*pi++ = *pj; \
|
|
||||||
*pj++ = t; \
|
|
||||||
} while (--i > 0); \
|
|
||||||
}
|
|
||||||
|
|
||||||
#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
|
|
||||||
es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1;
|
|
||||||
|
|
||||||
static inline void
|
|
||||||
_DEFUN(swapfunc, (a, b, n, swaptype),
|
|
||||||
char *a _AND
|
|
||||||
char *b _AND
|
|
||||||
int n _AND
|
|
||||||
int swaptype)
|
|
||||||
{
|
|
||||||
if(swaptype <= 1)
|
|
||||||
swapcode(long, a, b, n)
|
|
||||||
else
|
|
||||||
swapcode(char, a, b, n)
|
|
||||||
}
|
|
||||||
|
|
||||||
#define swap(a, b) \
|
|
||||||
if (swaptype == 0) { \
|
|
||||||
long t = *(long *)(a); \
|
|
||||||
*(long *)(a) = *(long *)(b); \
|
|
||||||
*(long *)(b) = t; \
|
|
||||||
} else \
|
|
||||||
swapfunc(a, b, es, swaptype)
|
|
||||||
|
|
||||||
#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype)
|
|
||||||
|
|
||||||
static inline char *
|
|
||||||
_DEFUN(med3, (a, b, c, cmp),
|
|
||||||
char *a _AND
|
|
||||||
char *b _AND
|
|
||||||
char *c _AND
|
|
||||||
int (*cmp)())
|
|
||||||
{
|
|
||||||
return cmp(a, b) < 0 ?
|
|
||||||
(cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a ))
|
|
||||||
:(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
|
|
||||||
}
|
|
||||||
|
|
||||||
void
|
|
||||||
_DEFUN(qsort, (a, n, es, cmp),
|
|
||||||
void *a _AND
|
|
||||||
size_t n _AND
|
|
||||||
size_t es _AND
|
|
||||||
int (*cmp)())
|
|
||||||
{
|
|
||||||
char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
|
|
||||||
int d, r, swaptype, swap_cnt;
|
|
||||||
|
|
||||||
loop: SWAPINIT(a, es);
|
|
||||||
swap_cnt = 0;
|
|
||||||
if (n < 7) {
|
|
||||||
for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
|
|
||||||
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
|
|
||||||
pl -= es)
|
|
||||||
swap(pl, pl - es);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
pm = (char *) a + (n / 2) * es;
|
|
||||||
if (n > 7) {
|
|
||||||
pl = a;
|
|
||||||
pn = (char *) a + (n - 1) * es;
|
|
||||||
if (n > 40) {
|
|
||||||
d = (n / 8) * es;
|
|
||||||
pl = med3(pl, pl + d, pl + 2 * d, cmp);
|
|
||||||
pm = med3(pm - d, pm, pm + d, cmp);
|
|
||||||
pn = med3(pn - 2 * d, pn - d, pn, cmp);
|
|
||||||
}
|
|
||||||
pm = med3(pl, pm, pn, cmp);
|
|
||||||
}
|
|
||||||
swap(a, pm);
|
|
||||||
pa = pb = (char *) a + es;
|
|
||||||
|
|
||||||
pc = pd = (char *) a + (n - 1) * es;
|
|
||||||
for (;;) {
|
|
||||||
while (pb <= pc && (r = cmp(pb, a)) <= 0) {
|
|
||||||
if (r == 0) {
|
|
||||||
swap_cnt = 1;
|
|
||||||
swap(pa, pb);
|
|
||||||
pa += es;
|
|
||||||
}
|
|
||||||
pb += es;
|
|
||||||
}
|
|
||||||
while (pb <= pc && (r = cmp(pc, a)) >= 0) {
|
|
||||||
if (r == 0) {
|
|
||||||
swap_cnt = 1;
|
|
||||||
swap(pc, pd);
|
|
||||||
pd -= es;
|
|
||||||
}
|
|
||||||
pc -= es;
|
|
||||||
}
|
|
||||||
if (pb > pc)
|
|
||||||
break;
|
|
||||||
swap(pb, pc);
|
|
||||||
swap_cnt = 1;
|
|
||||||
pb += es;
|
|
||||||
pc -= es;
|
|
||||||
}
|
|
||||||
if (swap_cnt == 0) { /* Switch to insertion sort */
|
|
||||||
for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
|
|
||||||
for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
|
|
||||||
pl -= es)
|
|
||||||
swap(pl, pl - es);
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
|
|
||||||
pn = (char *) a + n * es;
|
|
||||||
r = min(pa - (char *)a, pb - pa);
|
|
||||||
vecswap(a, pb - r, r);
|
|
||||||
r = min(pd - pc, pn - pd - es);
|
|
||||||
vecswap(pb, pn - r, r);
|
|
||||||
if ((r = pb - pa) > es)
|
|
||||||
qsort(a, r / es, es, cmp);
|
|
||||||
if ((r = pd - pc) > es) {
|
|
||||||
/* Iterate rather than recurse to save stack space */
|
|
||||||
a = pn - r;
|
|
||||||
n = r / es;
|
|
||||||
goto loop;
|
|
||||||
}
|
|
||||||
/* qsort(pn - r, r / es, es, cmp);*/
|
|
||||||
}
|
|
||||||
Loading…
x
Reference in New Issue
Block a user