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729d1ff9d8
* libc/argz/argz_add.c: Change to use _DEFUN macro for function
definition.
* libc/argz/argz_add_sep.c: Ditto.
* libc/argz/argz_append.c libc/argz/argz_count.c: Ditto.
* libc/argz/argz_create.c libc/argz/argz_create_sep.c: Ditto.
* libc/argz/argz_delete.c libc/argz/argz_extract.c: Ditto.
* libc/argz/argz_insert.c libc/argz/argz_next.c: Ditto.
* libc/argz/argz_replace.c libc/argz/argz_stringify.c: Ditto.
* libc/argz/envz_add.c libc/argz/envz_entry.c: Ditto.
* libc/argz/envz_get.c libc/argz/envz_merge.c: Ditto.
* libc/argz/envz_remove.c libc/argz/envz_strip.c: Ditto.
* libc/locale/nl_langinfo.c libc/misc/ffs.c: Ditto.
* libc/posix/closedir.c libc/posix/creat.c: Ditto.
* libc/posix/execl.c libc/posix/execle.c: Ditto.
* libc/posix/execlp.c libc/posix/execve.c: Ditto.
* libc/posix/isatty.c libc/posix/opendir.c: Ditto.
* libc/posix/popen.c libc/posix/readdir.c: Ditto.
* libc/posix/readdir_r.c libc/posix/rewinddir.c: Ditto.
* libc/posix/scandir.c libc/posix/seekdir.c: Ditto.
* libc/posix/telldir.c libc/search/hcreate.c: Ditto.
* libc/search/tdelete.c libc/search/tdestroy.c: Ditto.
* libc/search/tfind.c libc/search/tsearch.c: Ditto.
* libc/search/twalk.c libc/signal/signal.c: Ditto.
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/* $NetBSD: tfind.c,v 1.2 1999/09/16 11:45:37 lukem Exp $ */
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/*
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* Tree search generalized from Knuth (6.2.2) Algorithm T just like
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* the AT&T man page says.
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*
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* The node_t structure is for internal use only, lint doesn't grok it.
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*
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* Written by reading the System V Interface Definition, not the code.
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*
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* Totally public domain.
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*/
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#include <sys/cdefs.h>
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#if 0
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: tfind.c,v 1.2 1999/09/16 11:45:37 lukem Exp $");
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#endif /* LIBC_SCCS and not lint */
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#endif
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#include <assert.h>
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#define _SEARCH_PRIVATE
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#include <stdlib.h>
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#include <search.h>
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/* find a node, or return 0 */
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void *
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_DEFUN(tfind, (vkey, vrootp, compar),
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const void *vkey _AND /* key to be found */
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void **vrootp _AND /* address of the tree root */
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int (*compar)(const void *, const void *))
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{
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node_t **rootp = (node_t **)vrootp;
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if (rootp == NULL)
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return NULL;
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while (*rootp != NULL) { /* T1: */
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int r;
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if ((r = (*compar)(vkey, (*rootp)->key)) == 0) /* T2: */
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return *rootp; /* key found */
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rootp = (r < 0) ?
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&(*rootp)->llink : /* T3: follow left branch */
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&(*rootp)->rlink; /* T4: follow right branch */
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}
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return NULL;
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}
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