- Remove the lsearch() and lfind() functions and their manpage from
the compatibility library libcompat. - Add new implementations of lsearch() and lfind() which conform to IEEE Std 1003.1-2001 to libc. Add a new manual page for them and add them to the makefile. - Add function prototypes for lsearch() and lfind() to the search.h header.
This commit is contained in:
Robert Drehmel
parent
31cfc49a4e
commit
6c84d0b1a5
@ -50,6 +50,10 @@ int hcreate(size_t);
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void hdestroy(void);
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void hdestroy(void);
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ENTRY *hsearch(ENTRY, ACTION);
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ENTRY *hsearch(ENTRY, ACTION);
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void insque(void *, void *);
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void insque(void *, void *);
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void *lfind(const void *, const void *, size_t *, size_t,
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int (*)(const void *, const void *));
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void *lsearch(const void *, void *, size_t *, size_t,
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int (*)(const void *, const void *));
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void remque(void *);
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void remque(void *);
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void *tdelete(const void * __restrict, void ** __restrict,
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void *tdelete(const void * __restrict, void ** __restrict,
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int (*)(const void *, const void *));
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int (*)(const void *, const void *));
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@ -7,7 +7,7 @@
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MISRCS+=_Exit.c abort.c abs.c atexit.c atof.c atoi.c atol.c atoll.c \
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MISRCS+=_Exit.c abort.c abs.c atexit.c atof.c atoi.c atol.c atoll.c \
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bsearch.c calloc.c div.c exit.c getenv.c getopt.c getopt_long.c \
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bsearch.c calloc.c div.c exit.c getenv.c getopt.c getopt_long.c \
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getsubopt.c hcreate.c heapsort.c imaxabs.c imaxdiv.c insque.c \
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getsubopt.c hcreate.c heapsort.c imaxabs.c imaxdiv.c insque.c \
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labs.c ldiv.c llabs.c lldiv.c malloc.c merge.c putenv.c \
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labs.c ldiv.c llabs.c lldiv.c lsearch.c malloc.c merge.c putenv.c \
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qsort.c qsort_r.c radixsort.c rand.c random.c reallocf.c realpath.c \
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qsort.c qsort_r.c radixsort.c rand.c random.c reallocf.c realpath.c \
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remque.c setenv.c strfmon.c strhash.c strtod.c strtoimax.c strtol.c \
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remque.c setenv.c strfmon.c strhash.c strtod.c strtoimax.c strtol.c \
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strtoll.c strtoq.c strtoul.c strtoull.c strtoumax.c strtouq.c \
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strtoll.c strtoq.c strtoul.c strtoull.c strtoumax.c strtouq.c \
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@ -22,7 +22,7 @@ MISRCS+=_Exit.c abort.c abs.c atexit.c atof.c atoi.c atol.c atoll.c \
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MAN+= abort.3 abs.3 alloca.3 atexit.3 atof.3 atoi.3 atol.3 bsearch.3 \
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MAN+= abort.3 abs.3 alloca.3 atexit.3 atof.3 atoi.3 atol.3 bsearch.3 \
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div.3 exit.3 getenv.3 getopt.3 getopt_long.3 getsubopt.3 hcreate.3 \
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div.3 exit.3 getenv.3 getopt.3 getopt_long.3 getsubopt.3 hcreate.3 \
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imaxabs.3 imaxdiv.3 insque.3 labs.3 ldiv.3 llabs.3 lldiv.3 \
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imaxabs.3 imaxdiv.3 insque.3 labs.3 ldiv.3 llabs.3 lldiv.3 \
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malloc.3 memory.3 qsort.3 radixsort.3 rand.3 random.3 \
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lsearch.3 malloc.3 memory.3 qsort.3 radixsort.3 rand.3 random.3 \
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realpath.3 strfmon.3 strtod.3 strtol.3 strtoul.3 system.3 tsearch.3
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realpath.3 strfmon.3 strtod.3 strtol.3 strtoul.3 system.3 tsearch.3
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MLINKS+=atol.3 atoll.3
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MLINKS+=atol.3 atoll.3
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@ -30,6 +30,7 @@ MLINKS+=exit.3 _Exit.3
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MLINKS+=getenv.3 putenv.3 getenv.3 setenv.3 getenv.3 unsetenv.3
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MLINKS+=getenv.3 putenv.3 getenv.3 setenv.3 getenv.3 unsetenv.3
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MLINKS+=hcreate.3 hdestroy.3 hcreate.3 hsearch.3
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MLINKS+=hcreate.3 hdestroy.3 hcreate.3 hsearch.3
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MLINKS+=insque.3 remque.3
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MLINKS+=insque.3 remque.3
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MLINKS+=lsearch.3 lfind.3
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MLINKS+=qsort.3 heapsort.3 qsort.3 mergesort.3 qsort.3 qsort_r.3
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MLINKS+=qsort.3 heapsort.3 qsort.3 mergesort.3 qsort.3 qsort_r.3
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MLINKS+=rand.3 rand_r.3 rand.3 srand.3 rand.3 sranddev.3
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MLINKS+=rand.3 rand_r.3 rand.3 srand.3 rand.3 sranddev.3
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MLINKS+=random.3 initstate.3 random.3 setstate.3 random.3 srandom.3 \
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MLINKS+=random.3 initstate.3 random.3 setstate.3 random.3 srandom.3 \
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98
lib/libc/stdlib/lsearch.3
Normal file
98
lib/libc/stdlib/lsearch.3
Normal file
@ -0,0 +1,98 @@
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.\"
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.\" Initial implementation:
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.\" Copyright (c) 2002 Robert Drehmel
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.\" All rights reserved.
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.\"
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.\" As long as the above copyright statement and this notice remain
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.\" unchanged, you can do what ever you want with this file.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 11, 2002
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.Dt LSEARCH 3
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.Os
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.Sh NAME
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.Nm lsearch ,
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.Nm lfind
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.Nd linear search and append
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In search.h
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.Ft void *
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.Fn lsearch "const void *key" "void *base" "size_t *nelp" "size_t width" \
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"int (*compar)(const void *, const void *)"
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.Ft void *
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.Fn lfind "const void *key" "const void *base" "size_t *nelp" "size_t width" \
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"int (*compar)(const void *, const void *)"
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.Sh DESCRIPTION
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.Pp
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The
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.Fn lsearch
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and
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.Fn lfind
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functions walk linearly through an array and compare each element with
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the one to be sought using a supplied comparison function.
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.Pp
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.Fa key
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points to an element that matches the one that is searched.
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The array's address in memory is denoted by the
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.Fa base
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argument.
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The width of one element (i.e. the size as returned by
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.Fn sizeof )
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is passed as the
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.Fa width
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argument.
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The number of valid elements contained in the array (not the number of
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elements the array has space reserved for) is given in the integer pointed
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to by
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.Fa nelp .
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The
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.Fa compar
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argument points to a function which compares its two arguments and returns
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zero if they are matching and non-zero otherwise.
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.Pp
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If no matching element was found in the array,
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.Fn lsearch
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copies
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.Fa key
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into the position after the last element and increments the
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integer pointed to by
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.Fa nelp .
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.Sh RETURN VALUES
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.Fn lsearch
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and
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.Fn lfind
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return a pointer to the first element found.
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If no element was found,
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.Fn lsearch
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returns a pointer to the newly added element, whereas
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.Fn lfind
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returns
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.Dv NULL .
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Both functions return
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.Dv NULL
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if an error occurs.
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.Sh SEE ALSO
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.Xr bsearch 3 ,
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.Xr hsearch 3 ,
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.Xr tsearch 3
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.Sh HISTORY
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The
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.Fn lsearch
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and
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.Fn lfind
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functions appeared in
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.Bx 4.2 .
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In
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.Fx 5.0 ,
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they reappeared conforming to
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.St -p1003.1-2001 .
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.Sh STANDARDS
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The
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.Fn lsearch
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and
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.Fn lfind
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functions conform to
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.St -p1003.1-2001 .
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64
lib/libc/stdlib/lsearch.c
Normal file
64
lib/libc/stdlib/lsearch.c
Normal file
@ -0,0 +1,64 @@
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/*
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* Initial implementation:
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* Copyright (c) 2002 Robert Drehmel
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* All rights reserved.
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*
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* As long as the above copyright statement and this notice remain
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* unchanged, you can do what ever you want with this file.
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*/
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#include <sys/types.h>
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#define _SEARCH_PRIVATE
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#include <search.h>
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#include <stdint.h> /* for uint8_t */
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#include <stdlib.h> /* for NULL */
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#include <string.h> /* for memcpy() prototype */
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static void *lwork(const void *, const void *, size_t *, size_t,
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int (*)(const void *, const void *), int);
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void *lsearch(const void *key, void *base, size_t *nelp, size_t width,
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int (*compar)(const void *, const void *))
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{
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return (lwork(key, base, nelp, width, compar, 1));
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}
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void *lfind(const void *key, const void *base, size_t *nelp, size_t width,
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int (*compar)(const void *, const void *))
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{
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return (lwork(key, base, nelp, width, compar, 0));
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}
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static void *
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lwork(const void *key, const void *base, size_t *nelp, size_t width,
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int (*compar)(const void *, const void *), int addelem)
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{
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uint8_t *ep, *endp;
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/*
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* Cast to an integer value first to avoid the warning for removing
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* 'const' via a cast.
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*/
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ep = (uint8_t *)(uintptr_t)base;
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for (endp = (uint8_t *)(ep + width * *nelp); ep < endp; ep += width) {
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if (compar(key, ep) == 0)
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return (ep);
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}
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/* lfind() shall return when the key was not found. */
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if (!addelem)
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return (NULL);
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/*
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* lsearch() adds the key to the end of the table and increments
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* the number of elements.
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*/
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memcpy(endp, key, width);
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++*nelp;
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return (endp);
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}
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@ -1,105 +0,0 @@
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.\" Copyright (c) 1989, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
|
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.\" modification, are permitted provided that the following conditions
|
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.\" are met:
|
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.\" 1. Redistributions of source code must retain the above copyright
|
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||||||
.\" notice, this list of conditions and the following disclaimer.
|
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.\" 2. Redistributions in binary form must reproduce the above copyright
|
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||||||
.\" notice, this list of conditions and the following disclaimer in the
|
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||||||
.\" documentation and/or other materials provided with the distribution.
|
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.\" 3. All advertising materials mentioning features or use of this software
|
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.\" must display the following acknowledgement:
|
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.\" This product includes software developed by the University of
|
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.\" California, Berkeley and its contributors.
|
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.\" 4. Neither the name of the University nor the names of its contributors
|
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.\" may be used to endorse or promote products derived from this software
|
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.\" without specific prior written permission.
|
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
||||||
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
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||||||
.\" 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
|
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||||||
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)lsearch.3 8.1 (Berkeley) 6/4/93
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.\" $FreeBSD$
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.\"
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.Dd June 4, 1993
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.Dt LSEARCH 3
|
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.Os
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.Sh NAME
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.Nm lsearch ,
|
|
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.Nm lfind
|
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.Nd linear searching routines
|
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.Sh LIBRARY
|
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.Lb libcompat
|
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.Sh SYNOPSIS
|
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.In sys/types.h
|
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.Ft char *
|
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.Fn lsearch "const void *key" "const void *base" "size_t *nelp" "size_t width" "int (*compar)(void *, void *)"
|
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.Ft char *
|
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||||||
.Fn lfind "const void *key" "const void *base" "size_t *nelp" "size_t width" "int (*compar)(void *, void *)"
|
|
||||||
.Sh DESCRIPTION
|
|
||||||
.Bf -symbolic
|
|
||||||
This interface was obsolete before it was written.
|
|
||||||
.Ef
|
|
||||||
.Pp
|
|
||||||
The functions
|
|
||||||
.Fn lsearch ,
|
|
||||||
and
|
|
||||||
.Fn lfind
|
|
||||||
provide basic linear searching functionality.
|
|
||||||
.Pp
|
|
||||||
.Fa Base
|
|
||||||
is the pointer to the beginning of an array.
|
|
||||||
The argument
|
|
||||||
.Fa nelp
|
|
||||||
is the current number of elements in the array, where each element
|
|
||||||
is
|
|
||||||
.Fa width
|
|
||||||
bytes long.
|
|
||||||
The
|
|
||||||
.Fa compar
|
|
||||||
function
|
|
||||||
is a comparison routine which is used to compare two elements.
|
|
||||||
It takes two arguments which point to the
|
|
||||||
.Fa key
|
|
||||||
object and to an array member, in that order, and must return an integer
|
|
||||||
less than, equivalent to, or greater than zero if the
|
|
||||||
.Fa key
|
|
||||||
object is considered, respectively, to be less than, equal to, or greater
|
|
||||||
than the array member.
|
|
||||||
.Pp
|
|
||||||
The
|
|
||||||
.Fn lsearch
|
|
||||||
and
|
|
||||||
.Fn lfind
|
|
||||||
functions
|
|
||||||
return a pointer into the array referenced by
|
|
||||||
.Fa base
|
|
||||||
where
|
|
||||||
.Fa key
|
|
||||||
is located.
|
|
||||||
If
|
|
||||||
.Fa key
|
|
||||||
does not exist,
|
|
||||||
.Fn lfind
|
|
||||||
will return a null pointer and
|
|
||||||
.Fn lsearch
|
|
||||||
will add it to the array.
|
|
||||||
When an element is added to the array by
|
|
||||||
.Fn lsearch
|
|
||||||
the location referenced by the argument
|
|
||||||
.Fa nelp
|
|
||||||
is incremented by one.
|
|
||||||
.Sh SEE ALSO
|
|
||||||
.Xr bsearch 3 ,
|
|
||||||
.Xr db 3
|
|
||||||
@ -1,95 +0,0 @@
|
|||||||
/*
|
|
||||||
* Copyright (c) 1989, 1993
|
|
||||||
* The Regents of the University of California. All rights reserved.
|
|
||||||
*
|
|
||||||
* This code is derived from software contributed to Berkeley by
|
|
||||||
* Roger L. Snyder.
|
|
||||||
*
|
|
||||||
* 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.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#if defined(LIBC_SCCS) && !defined(lint)
|
|
||||||
static char sccsid[] = "@(#)lsearch.c 8.1 (Berkeley) 6/4/93";
|
|
||||||
#endif /* LIBC_SCCS and not lint */
|
|
||||||
#include <sys/cdefs.h>
|
|
||||||
__FBSDID("$FreeBSD$");
|
|
||||||
|
|
||||||
#include <sys/types.h>
|
|
||||||
#include <unistd.h>
|
|
||||||
#include <string.h>
|
|
||||||
|
|
||||||
static char *linear_base();
|
|
||||||
|
|
||||||
char *
|
|
||||||
lsearch(key, base, nelp, width, compar)
|
|
||||||
char *key, *base;
|
|
||||||
u_int *nelp, width;
|
|
||||||
int (*compar)();
|
|
||||||
{
|
|
||||||
return(linear_base(key, base, nelp, width, compar, 1));
|
|
||||||
}
|
|
||||||
|
|
||||||
char *
|
|
||||||
lfind(key, base, nelp, width, compar)
|
|
||||||
char *key, *base;
|
|
||||||
u_int *nelp, width;
|
|
||||||
int (*compar)();
|
|
||||||
{
|
|
||||||
return(linear_base(key, base, nelp, width, compar, 0));
|
|
||||||
}
|
|
||||||
|
|
||||||
static char *
|
|
||||||
linear_base(key, base, nelp, width, compar, add_flag)
|
|
||||||
char *key, *base;
|
|
||||||
u_int *nelp, width;
|
|
||||||
int (*compar)(), add_flag;
|
|
||||||
{
|
|
||||||
char *element, *end;
|
|
||||||
|
|
||||||
end = base + *nelp * width;
|
|
||||||
for (element = base; element < end; element += width)
|
|
||||||
if (!compar(element, key)) /* key found */
|
|
||||||
return(element);
|
|
||||||
|
|
||||||
if (!add_flag) /* key not found */
|
|
||||||
return(NULL);
|
|
||||||
|
|
||||||
/*
|
|
||||||
* The UNIX System User's Manual, 1986 edition claims that
|
|
||||||
* a NULL pointer is returned by lsearch with errno set
|
|
||||||
* appropriately, if there is not enough room in the table
|
|
||||||
* to add a new item. This can't be done as none of these
|
|
||||||
* routines have any method of determining the size of the
|
|
||||||
* table. This comment was isn't in the 1986-87 System V
|
|
||||||
* manual.
|
|
||||||
*/
|
|
||||||
++*nelp;
|
|
||||||
bcopy(key, end, (int)width);
|
|
||||||
return(end);
|
|
||||||
}
|
|
||||||
@ -23,15 +23,14 @@ MLINKS+=cftime.3 ascftime.3
|
|||||||
|
|
||||||
# compat 4.3 sources
|
# compat 4.3 sources
|
||||||
# XXX MISSING: ecvt.c gcvt.c sibuf.c sobuf.c strout.c
|
# XXX MISSING: ecvt.c gcvt.c sibuf.c sobuf.c strout.c
|
||||||
SRCS+= cfree.c lsearch.c regex.c rexec.c
|
SRCS+= cfree.c regex.c rexec.c
|
||||||
|
|
||||||
# XXX MISSING: ecvt.0
|
# XXX MISSING: ecvt.0
|
||||||
MAN+= 4.3/cfree.3 4.3/lsearch.3 4.3/re_comp.3 4.3/rexec.3
|
MAN+= 4.3/cfree.3 4.3/re_comp.3 4.3/rexec.3
|
||||||
|
|
||||||
# XXX MISSING: ecvt.3, so can't MLINK
|
# XXX MISSING: ecvt.3, so can't MLINK
|
||||||
#MLINKS+=ecvt.3 fcvt.3 ecvt.3 gcvt.3
|
#MLINKS+=ecvt.3 fcvt.3 ecvt.3 gcvt.3
|
||||||
MLINKS+=re_comp.3 re_exec.3
|
MLINKS+=re_comp.3 re_exec.3
|
||||||
MLINKS+=lsearch.3 lfind.3
|
|
||||||
|
|
||||||
# compat 4.4 sources
|
# compat 4.4 sources
|
||||||
SRCS+= cuserid.c
|
SRCS+= cuserid.c
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user