aboutsummaryrefslogtreecommitdiff
path: root/db/hash
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2000-01-02 06:01:06 +0000
committerUlrich Drepper <drepper@redhat.com>2000-01-02 06:01:06 +0000
commit8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3 (patch)
tree099a250d7366aef2ab028fdb24f0d692cd784b4a /db/hash
parent9a6450d578556c11e7c173d2f28362345b8f1258 (diff)
downloadglibc-8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3.tar.xz
glibc-8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3.zip
Update.
* Makeconfig (all-subdirs): Remove db and db2. * db/*: Removed. * db2/*: Removed.
Diffstat (limited to 'db/hash')
-rw-r--r--db/hash/extern.h65
-rw-r--r--db/hash/hash.c999
-rw-r--r--db/hash/hash.h293
-rw-r--r--db/hash/hash_bigkey.c668
-rw-r--r--db/hash/hash_buf.c355
-rw-r--r--db/hash/hash_func.c212
-rw-r--r--db/hash/hash_log2.c56
-rw-r--r--db/hash/hash_page.c944
-rw-r--r--db/hash/ndbm.c215
-rw-r--r--db/hash/page.h92
10 files changed, 0 insertions, 3899 deletions
diff --git a/db/hash/extern.h b/db/hash/extern.h
deleted file mode 100644
index 4f1f23d67c..0000000000
--- a/db/hash/extern.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993, 1994
- * 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.
- *
- * @(#)extern.h 8.4 (Berkeley) 6/16/94
- */
-
-BUFHEAD *__add_ovflpage __P((HTAB *, BUFHEAD *));
-int __addel __P((HTAB *, BUFHEAD *, const DBT *, const DBT *));
-int __big_delete __P((HTAB *, BUFHEAD *));
-int __big_insert __P((HTAB *, BUFHEAD *, const DBT *, const DBT *));
-int __big_keydata __P((HTAB *, BUFHEAD *, DBT *, DBT *, int));
-int __big_return __P((HTAB *, BUFHEAD *, int, DBT *, int));
-int __big_split __P((HTAB *, BUFHEAD *, BUFHEAD *, BUFHEAD *,
- int, u_int32_t, SPLIT_RETURN *));
-int __buf_free __P((HTAB *, int, int));
-void __buf_init __P((HTAB *, int));
-u_int32_t __call_hash __P((HTAB *, char *, int));
-int __delpair __P((HTAB *, BUFHEAD *, int));
-int __expand_table __P((HTAB *));
-int __find_bigpair __P((HTAB *, BUFHEAD *, int, char *, int));
-u_int16_t __find_last_page __P((HTAB *, BUFHEAD **));
-void __free_ovflpage __P((HTAB *, BUFHEAD *));
-BUFHEAD *__get_buf __P((HTAB *, u_int32_t, BUFHEAD *, int));
-int __get_page __P((HTAB *, char *, u_int32_t, int, int, int));
-int __ibitmap __P((HTAB *, int, int, int));
-u_int32_t __hash_log2 __P((u_int32_t));
-int __put_page __P((HTAB *, char *, u_int32_t, int, int));
-void __reclaim_buf __P((HTAB *, BUFHEAD *));
-int __split_page __P((HTAB *, u_int32_t, u_int32_t));
-
-/* Default hash routine. */
-extern u_int32_t (*__default_hash) __P((const void *, size_t));
-
-#ifdef HASH_STATISTICS
-extern int hash_accesses, hash_collisions, hash_expansions, hash_overflows;
-#endif
diff --git a/db/hash/hash.c b/db/hash/hash.c
deleted file mode 100644
index 99592eac51..0000000000
--- a/db/hash/hash.c
+++ /dev/null
@@ -1,999 +0,0 @@
-/*-
- * Copyright (c) 1990, 1993, 1994
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Margo Seltzer.
- *
- * 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[] = "@(#)hash.c 8.9 (Berkeley) 6/16/94";
-#endif /* LIBC_SCCS and not lint */
-
-#include <sys/param.h>
-#include <sys/stat.h>
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#ifdef DEBUG
-#include <assert.h>
-#endif
-
-#include <db.h>
-#include "hash.h"
-#include "page.h"
-#include "extern.h"
-
-static int alloc_segs __P((HTAB *, int));
-static int flush_meta __P((HTAB *));
-static int hash_access __P((HTAB *, ACTION, DBT *, DBT *));
-static int hash_close __P((DB *));
-static int hash_delete __P((const DB *, const DBT *, u_int32_t));
-static int hash_fd __P((const DB *));
-static int hash_get __P((const DB *, const DBT *, DBT *, u_int32_t));
-static int hash_put __P((const DB *, DBT *, const DBT *, u_int32_t));
-static void *hash_realloc __P((SEGMENT **, int, int));
-static int hash_seq __P((const DB *, DBT *, DBT *, u_int32_t));
-static int hash_sync __P((const DB *, u_int32_t));
-static int hdestroy __P((HTAB *));
-static HTAB *init_hash __P((HTAB *, const char *, HASHINFO *));
-static int init_htab __P((HTAB *, int));
-#if BYTE_ORDER == LITTLE_ENDIAN
-static void swap_header __P((HTAB *));
-static void swap_header_copy __P((HASHHDR *, HASHHDR *));
-#endif
-
-/* Fast arithmetic, relying on powers of 2, */
-#define MOD(x, y) ((x) & ((y) - 1))
-
-#define RETURN_ERROR(ERR, LOC) { save_errno = ERR; goto LOC; }
-
-/* Return values */
-#define SUCCESS (0)
-#define ERROR (-1)
-#define ABNORMAL (1)
-
-#ifdef HASH_STATISTICS
-int hash_accesses, hash_collisions, hash_expansions, hash_overflows;
-#endif
-
-/************************** INTERFACE ROUTINES ***************************/
-/* OPEN/CLOSE */
-
-extern DB *
-__hash_open(file, flags, mode, info, dflags)
- const char *file;
- int flags, mode, dflags;
- const HASHINFO *info; /* Special directives for create */
-{
- HTAB *hashp;
- struct stat statbuf;
- DB *dbp;
- int bpages, hdrsize, new_table, nsegs, save_errno;
-
- if ((flags & O_ACCMODE) == O_WRONLY) {
- errno = EINVAL;
- return (NULL);
- }
-
- if (!(hashp = (HTAB *)calloc(1, sizeof(HTAB))))
- return (NULL);
- hashp->fp = -1;
-
- /*
- * Even if user wants write only, we need to be able to read
- * the actual file, so we need to open it read/write. But, the
- * field in the hashp structure needs to be accurate so that
- * we can check accesses.
- */
- hashp->flags = flags;
-
- new_table = 0;
- if (!file || (flags & O_TRUNC) ||
- (stat(file, &statbuf) && (errno == ENOENT))) {
- if (errno == ENOENT)
- errno = 0; /* Just in case someone looks at errno */
- new_table = 1;
- }
- if (file) {
- if ((hashp->fp = open(file, flags, mode)) == -1)
- RETURN_ERROR(errno, error0);
- (void)fcntl(hashp->fp, F_SETFD, 1);
- }
- if (new_table) {
- if (!(hashp = init_hash(hashp, file, (HASHINFO *)info)))
- RETURN_ERROR(errno, error1);
- } else {
- /* Table already exists */
- if (info && info->hash)
- hashp->hash = info->hash;
- else
- hashp->hash = __default_hash;
-
- hdrsize = read(hashp->fp, &hashp->hdr, sizeof(HASHHDR));
-#if BYTE_ORDER == LITTLE_ENDIAN
- swap_header(hashp);
-#endif
- if (hdrsize == -1)
- RETURN_ERROR(errno, error1);
- if (hdrsize != sizeof(HASHHDR))
- RETURN_ERROR(EFTYPE, error1);
- /* Verify file type, versions and hash function */
- if (hashp->MAGIC != HASHMAGIC)
- RETURN_ERROR(EFTYPE, error1);
-#define OLDHASHVERSION 1
- if (hashp->VERSION != HASHVERSION &&
- hashp->VERSION != OLDHASHVERSION)
- RETURN_ERROR(EFTYPE, error1);
- if (hashp->hash(CHARKEY, sizeof(CHARKEY))
- != (u_int32_t) hashp->H_CHARKEY)
- RETURN_ERROR(EFTYPE, error1);
- /*
- * Figure out how many segments we need. Max_Bucket is the
- * maximum bucket number, so the number of buckets is
- * max_bucket + 1.
- */
- nsegs = (hashp->MAX_BUCKET + 1 + hashp->SGSIZE - 1) /
- hashp->SGSIZE;
- hashp->nsegs = 0;
- if (alloc_segs(hashp, nsegs))
- /*
- * If alloc_segs fails, table will have been destroyed
- * and errno will have been set.
- */
- return (NULL);
- /* Read in bitmaps */
- bpages = (hashp->SPARES[hashp->OVFL_POINT] +
- (hashp->BSIZE << BYTE_SHIFT) - 1) >>
- (hashp->BSHIFT + BYTE_SHIFT);
-
- hashp->nmaps = bpages;
- (void)memset(&hashp->mapp[0], 0, bpages * sizeof(u_int32_t *));
- }
-
- /* Initialize Buffer Manager */
- if (info && info->cachesize)
- __buf_init(hashp, info->cachesize);
- else
- __buf_init(hashp, DEF_BUFSIZE);
-
- hashp->new_file = new_table;
- hashp->save_file = file && (hashp->flags & O_ACCMODE) != O_RDONLY;
- hashp->cbucket = -1;
- if (!(dbp = (DB *)malloc(sizeof(DB)))) {
- save_errno = errno;
- hdestroy(hashp);
- errno = save_errno;
- return (NULL);
- }
- dbp->internal = hashp;
- dbp->close = hash_close;
- dbp->del = hash_delete;
- dbp->fd = hash_fd;
- dbp->get = hash_get;
- dbp->put = hash_put;
- dbp->seq = hash_seq;
- dbp->sync = hash_sync;
- dbp->type = DB_HASH;
-
-#ifdef DEBUG
- (void)fprintf(stderr,
-"%s\n%s%x\n%s%d\n%s%d\n%s%d\n%s%d\n%s%d\n%s%d\n%s%d\n%s%d\n%s%d\n%s%x\n%s%x\n%s%d\n%s%d\n",
- "init_htab:",
- "TABLE POINTER ", hashp,
- "BUCKET SIZE ", hashp->BSIZE,
- "BUCKET SHIFT ", hashp->BSHIFT,
- "DIRECTORY SIZE ", hashp->DSIZE,
- "SEGMENT SIZE ", hashp->SGSIZE,
- "SEGMENT SHIFT ", hashp->SSHIFT,
- "FILL FACTOR ", hashp->FFACTOR,
- "MAX BUCKET ", hashp->MAX_BUCKET,
- "OVFL POINT ", hashp->OVFL_POINT,
- "LAST FREED ", hashp->LAST_FREED,
- "HIGH MASK ", hashp->HIGH_MASK,
- "LOW MASK ", hashp->LOW_MASK,
- "NSEGS ", hashp->nsegs,
- "NKEYS ", hashp->NKEYS);
-#endif
-#ifdef HASH_STATISTICS
- hash_overflows = hash_accesses = hash_collisions = hash_expansions = 0;
-#endif
- return (dbp);
-
-error1:
- if (hashp != NULL)
- (void)close(hashp->fp);
-
-error0:
- free(hashp);
- errno = save_errno;
- return (NULL);
-}
-
-static int
-hash_close(dbp)
- DB *dbp;
-{
- HTAB *hashp;
- int retval;
-
- if (!dbp)
- return (ERROR);
-
- hashp = (HTAB *)dbp->internal;
- retval = hdestroy(hashp);
- free(dbp);
- return (retval);
-}
-
-static int
-hash_fd(dbp)
- const DB *dbp;
-{
- HTAB *hashp;
-
- if (!dbp)
- return (ERROR);
-
- hashp = (HTAB *)dbp->internal;
- if (hashp->fp == -1) {
- errno = ENOENT;
- return (-1);
- }
- return (hashp->fp);
-}
-
-/************************** LOCAL CREATION ROUTINES **********************/
-static HTAB *
-init_hash(hashp, file, info)
- HTAB *hashp;
- const char *file;
- HASHINFO *info;
-{
-#ifdef _STATBUF_ST_BLKSIZE
- struct stat statbuf;
-#endif
- int nelem;
-
- nelem = 1;
- hashp->NKEYS = 0;
- hashp->LORDER = BYTE_ORDER;
- hashp->BSIZE = DEF_BUCKET_SIZE;
- hashp->BSHIFT = DEF_BUCKET_SHIFT;
- hashp->SGSIZE = DEF_SEGSIZE;
- hashp->SSHIFT = DEF_SEGSIZE_SHIFT;
- hashp->DSIZE = DEF_DIRSIZE;
- hashp->FFACTOR = DEF_FFACTOR;
- hashp->hash = __default_hash;
- memset(hashp->SPARES, 0, sizeof(hashp->SPARES));
- memset(hashp->BITMAPS, 0, sizeof (hashp->BITMAPS));
-
- /* Fix bucket size to be optimal for file system */
-#ifdef _STATBUF_ST_BLKSIZE
- if (file != NULL) {
- if (stat(file, &statbuf))
- return (NULL);
- hashp->BSIZE = statbuf.st_blksize;
- hashp->BSHIFT = __hash_log2(hashp->BSIZE);
- }
-#endif
-
- if (info) {
- if (info->bsize) {
- /* Round pagesize up to power of 2 */
- hashp->BSHIFT = __hash_log2(info->bsize);
- hashp->BSIZE = 1 << hashp->BSHIFT;
- if (hashp->BSIZE > MAX_BSIZE) {
- errno = EINVAL;
- return (NULL);
- }
- }
- if (info->ffactor)
- hashp->FFACTOR = info->ffactor;
- if (info->hash)
- hashp->hash = info->hash;
- if (info->nelem)
- nelem = info->nelem;
- if (info->lorder) {
- if (info->lorder != BIG_ENDIAN &&
- info->lorder != LITTLE_ENDIAN) {
- errno = EINVAL;
- return (NULL);
- }
- hashp->LORDER = info->lorder;
- }
- }
- /* init_htab should destroy the table and set errno if it fails */
- if (init_htab(hashp, nelem))
- return (NULL);
- else
- return (hashp);
-}
-/*
- * This calls alloc_segs which may run out of memory. Alloc_segs will destroy
- * the table and set errno, so we just pass the error information along.
- *
- * Returns 0 on No Error
- */
-static int
-init_htab(hashp, nelem)
- HTAB *hashp;
- int nelem;
-{
- register int nbuckets, nsegs;
- int l2;
-
- /*
- * Divide number of elements by the fill factor and determine a
- * desired number of buckets. Allocate space for the next greater
- * power of two number of buckets.
- */
- nelem = (nelem - 1) / hashp->FFACTOR + 1;
-
- l2 = __hash_log2(MAX(nelem, 2));
- nbuckets = 1 << l2;
-
- hashp->SPARES[l2] = l2 + 1;
- hashp->SPARES[l2 + 1] = l2 + 1;
- hashp->OVFL_POINT = l2;
- hashp->LAST_FREED = 2;
-
- /* First bitmap page is at: splitpoint l2 page offset 1 */
- if (__ibitmap(hashp, OADDR_OF(l2, 1), l2 + 1, 0))
- return (-1);
-
- hashp->MAX_BUCKET = hashp->LOW_MASK = nbuckets - 1;
- hashp->HIGH_MASK = (nbuckets << 1) - 1;
- hashp->HDRPAGES = ((MAX(sizeof(HASHHDR), MINHDRSIZE) - 1) >>
- hashp->BSHIFT) + 1;
-
- nsegs = (nbuckets - 1) / hashp->SGSIZE + 1;
- nsegs = 1 << __hash_log2(nsegs);
-
- if (nsegs > hashp->DSIZE)
- hashp->DSIZE = nsegs;
- return (alloc_segs(hashp, nsegs));
-}
-
-/********************** DESTROY/CLOSE ROUTINES ************************/
-
-/*
- * Flushes any changes to the file if necessary and destroys the hashp
- * structure, freeing all allocated space.
- */
-static int
-hdestroy(hashp)
- HTAB *hashp;
-{
- int i, save_errno;
-
- save_errno = 0;
-
-#ifdef HASH_STATISTICS
- (void)fprintf(stderr, "hdestroy: accesses %ld collisions %ld\n",
- hash_accesses, hash_collisions);
- (void)fprintf(stderr, "hdestroy: expansions %ld\n",
- hash_expansions);
- (void)fprintf(stderr, "hdestroy: overflows %ld\n",
- hash_overflows);
- (void)fprintf(stderr, "keys %ld maxp %d segmentcount %d\n",
- hashp->NKEYS, hashp->MAX_BUCKET, hashp->nsegs);
-
- for (i = 0; i < NCACHED; i++)
- (void)fprintf(stderr,
- "spares[%d] = %d\n", i, hashp->SPARES[i]);
-#endif
- /*
- * Call on buffer manager to free buffers, and if required,
- * write them to disk.
- */
- if (__buf_free(hashp, 1, hashp->save_file))
- save_errno = errno;
- if (hashp->dir) {
- free(*hashp->dir); /* Free initial segments */
- /* Free extra segments */
- while (hashp->exsegs--)
- free(hashp->dir[--hashp->nsegs]);
- free(hashp->dir);
- }
- if (flush_meta(hashp) && !save_errno)
- save_errno = errno;
- /* Free Bigmaps */
- for (i = 0; i < hashp->nmaps; i++)
- if (hashp->mapp[i])
- free(hashp->mapp[i]);
-
- if (hashp->fp != -1)
- (void)close(hashp->fp);
-
- free(hashp);
-
- if (save_errno) {
- errno = save_errno;
- return (ERROR);
- }
- return (SUCCESS);
-}
-/*
- * Write modified pages to disk
- *
- * Returns:
- * 0 == OK
- * -1 ERROR
- */
-static int
-hash_sync(dbp, flags)
- const DB *dbp;
- u_int32_t flags;
-{
- HTAB *hashp;
-
- if (flags != 0) {
- errno = EINVAL;
- return (ERROR);
- }
-
- if (!dbp)
- return (ERROR);
-
- hashp = (HTAB *)dbp->internal;
- if (!hashp->save_file)
- return (0);
- if (__buf_free(hashp, 0, 1) || flush_meta(hashp))
- return (ERROR);
- hashp->new_file = 0;
- return (0);
-}
-
-/*
- * Returns:
- * 0 == OK
- * -1 indicates that errno should be set
- */
-static int
-flush_meta(hashp)
- HTAB *hashp;
-{
- HASHHDR *whdrp;
-#if BYTE_ORDER == LITTLE_ENDIAN
- HASHHDR whdr;
-#endif
- int fp, i, wsize;
-
- if (!hashp->save_file)
- return (0);
- hashp->MAGIC = HASHMAGIC;
- hashp->VERSION = HASHVERSION;
- hashp->H_CHARKEY = hashp->hash(CHARKEY, sizeof(CHARKEY));
-
- fp = hashp->fp;
- whdrp = &hashp->hdr;
-#if BYTE_ORDER == LITTLE_ENDIAN
- whdrp = &whdr;
- swap_header_copy(&hashp->hdr, whdrp);
-#endif
- if ((lseek(fp, (off_t)0, SEEK_SET) == -1) ||
- ((wsize = write(fp, whdrp, sizeof(HASHHDR))) == -1))
- return (-1);
- else
- if (wsize != sizeof(HASHHDR)) {
- errno = EFTYPE;
- hashp->errnum = errno;
- return (-1);
- }
- for (i = 0; i < NCACHED; i++)
- if (hashp->mapp[i])
- if (__put_page(hashp, (char *)hashp->mapp[i],
- hashp->BITMAPS[i], 0, 1))
- return (-1);
- return (0);
-}
-
-/*******************************SEARCH ROUTINES *****************************/
-/*
- * All the access routines return
- *
- * Returns:
- * 0 on SUCCESS
- * 1 to indicate an external ERROR (i.e. key not found, etc)
- * -1 to indicate an internal ERROR (i.e. out of memory, etc)
- */
-static int
-hash_get(dbp, key, data, flag)
- const DB *dbp;
- const DBT *key;
- DBT *data;
- u_int32_t flag;
-{
- HTAB *hashp;
-
- hashp = (HTAB *)dbp->internal;
- if (flag) {
- hashp->errnum = errno = EINVAL;
- return (ERROR);
- }
- return (hash_access(hashp, HASH_GET, (DBT *)key, data));
-}
-
-static int
-hash_put(dbp, key, data, flag)
- const DB *dbp;
- DBT *key;
- const DBT *data;
- u_int32_t flag;
-{
- HTAB *hashp;
-
- hashp = (HTAB *)dbp->internal;
- if (flag && flag != R_NOOVERWRITE) {
- hashp->errnum = errno = EINVAL;
- return (ERROR);
- }
- if ((hashp->flags & O_ACCMODE) == O_RDONLY) {
- hashp->errnum = errno = EPERM;
- return (ERROR);
- }
- return (hash_access(hashp, flag == R_NOOVERWRITE ?
- HASH_PUTNEW : HASH_PUT, (DBT *)key, (DBT *)data));
-}
-
-static int
-hash_delete(dbp, key, flag)
- const DB *dbp;
- const DBT *key;
- u_int32_t flag; /* Ignored */
-{
- HTAB *hashp;
-
- hashp = (HTAB *)dbp->internal;
- if (flag && flag != R_CURSOR) {
- hashp->errnum = errno = EINVAL;
- return (ERROR);
- }
- if ((hashp->flags & O_ACCMODE) == O_RDONLY) {
- hashp->errnum = errno = EPERM;
- return (ERROR);
- }
- return (hash_access(hashp, HASH_DELETE, (DBT *)key, NULL));
-}
-
-/*
- * Assume that hashp has been set in wrapper routine.
- */
-static int
-hash_access(hashp, action, key, val)
- HTAB *hashp;
- ACTION action;
- DBT *key, *val;
-{
- register BUFHEAD *rbufp;
- BUFHEAD *bufp, *save_bufp;
- register u_int16_t *bp;
- register int n, ndx, off, size;
- register char *kp;
- u_int16_t pageno;
-
-#ifdef HASH_STATISTICS
- hash_accesses++;
-#endif