1 files changed, 331 insertions, 0 deletions
diff --git a/lib/libc/iconv/citrus_db.c b/lib/libc/iconv/citrus_db.c
new file mode 100644
index 0000000..2de848b
--- /dev/null
+++ b/lib/libc/iconv/citrus_db.c
@@ -0,0 +1,331 @@
+/* $FreeBSD$ */
+/* $NetBSD: citrus_db.c,v 1.5 2008/02/09 14:56:20 junyoung Exp $ */
+
+/*-
+ * Copyright (c)2003 Citrus Project,
+ * 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>
+#include <sys/endian.h>
+#include <sys/types.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "citrus_namespace.h"
+#include "citrus_bcs.h"
+#include "citrus_region.h"
+#include "citrus_memstream.h"
+#include "citrus_mmap.h"
+#include "citrus_db.h"
+#include "citrus_db_factory.h"
+#include "citrus_db_file.h"
+
+struct _citrus_db {
+	struct _region		 db_region;
+	_citrus_db_hash_func_t	 db_hashfunc;
+	void			*db_hashfunc_closure;
+};
+
+int
+_citrus_db_open(struct _citrus_db **rdb, struct _region *r, const char *magic,
+    _citrus_db_hash_func_t hashfunc, void *hashfunc_closure)
+{
+	struct _citrus_db *db;
+	struct _citrus_db_header_x *dhx;
+	struct _memstream ms;
+
+	_memstream_bind(&ms, r);
+
+	/* sanity check */
+	dhx = _memstream_getregion(&ms, NULL, sizeof(*dhx));
+	if (dhx == NULL)
+		return (EFTYPE);
+	if (strncmp(dhx->dhx_magic, magic, _CITRUS_DB_MAGIC_SIZE) != 0)
+		return (EFTYPE);
+	if (_memstream_seek(&ms, be32toh(dhx->dhx_entry_offset), SEEK_SET))
+		return (EFTYPE);
+
+	if (be32toh(dhx->dhx_num_entries)*_CITRUS_DB_ENTRY_SIZE >
+	    _memstream_remainder(&ms))
+		return (EFTYPE);
+
+	db = malloc(sizeof(*db));
+	if (db == NULL)
+		return (errno);
+	db->db_region = *r;
+	db->db_hashfunc = hashfunc;
+	db->db_hashfunc_closure = hashfunc_closure;
+	*rdb = db;
+
+	return (0);
+}
+
+void
+_citrus_db_close(struct _citrus_db *db)
+{
+
+	free(db);
+}
+
+int
+_citrus_db_lookup(struct _citrus_db *db, struct _citrus_region *key,
+    struct _citrus_region *data, struct _citrus_db_locator *dl)
+{
+	struct _citrus_db_entry_x *dex;
+	struct _citrus_db_header_x *dhx;
+	struct _citrus_region r;
+	struct _memstream ms;
+	uint32_t hashval, num_entries;
+	size_t offset;
+
+	_memstream_bind(&ms, &db->db_region);
+
+	dhx = _memstream_getregion(&ms, NULL, sizeof(*dhx));
+	num_entries = be32toh(dhx->dhx_num_entries);
+	if (num_entries == 0)
+		return (ENOENT);
+
+	if (dl != NULL && dl->dl_offset>0) {
+		hashval = dl->dl_hashval;
+		offset = dl->dl_offset;
+		if (offset >= _region_size(&db->db_region))
+			return (ENOENT);
+	} else {
+		hashval = db->db_hashfunc(key)%num_entries;
+		offset = be32toh(dhx->dhx_entry_offset) +
+		    hashval * _CITRUS_DB_ENTRY_SIZE;
+		if (dl)
+			dl->dl_hashval = hashval;
+	}
+	do {
+		/* seek to the next entry */
+		if (_citrus_memory_stream_seek(&ms, offset, SEEK_SET))
+			return (EFTYPE);
+		/* get the entry record */
+		dex = _memstream_getregion(&ms, NULL, _CITRUS_DB_ENTRY_SIZE);
+		if (dex == NULL)
+			return (EFTYPE);
+
+		/* jump to next entry having the same hash value. */
+		offset = be32toh(dex->dex_next_offset);
+
+		/* save the current position */
+		if (dl) {
+			dl->dl_offset = offset;
+			if (offset == 0)
+				dl->dl_offset = _region_size(&db->db_region);
+		}
+
+		/* compare hash value. */
+		if (be32toh(dex->dex_hash_value) != hashval)
+			/* not found */
+			break;
+		/* compare key length */
+		if (be32toh(dex->dex_key_size) == _region_size(key)) {
+			/* seek to the head of the key. */
+			if (_memstream_seek(&ms, be32toh(dex->dex_key_offset),
+			    SEEK_SET))
+				return (EFTYPE);
+			/* get the region of the key */
+			if (_memstream_getregion(&ms, &r,
+			    _region_size(key)) == NULL)
+				return (EFTYPE);
+			/* compare key byte stream */
+			if (memcmp(_region_head(&r), _region_head(key),
+			    _region_size(key)) == 0) {
+				/* match */
+				if (_memstream_seek(
+				    &ms, be32toh(dex->dex_data_offset),
+				    SEEK_SET))
+					return (EFTYPE);
+				if (_memstream_getregion(
+				    &ms, data,
+				    be32toh(dex->dex_data_size)) == NULL)
+					return (EFTYPE);
+				return (0);
+			}
+		}
+	} while (offset != 0);
+
+	return (ENOENT);
+}
+
+int
+_citrus_db_lookup_by_string(struct _citrus_db *db, const char *key,
+    struct _citrus_region *data, struct _citrus_db_locator *dl)
+{
+	struct _region r;
+
+	_region_init(&r, __DECONST(void *, key), strlen(key));
+
+	return (_citrus_db_lookup(db, &r, data, dl));
+}
+
+int
+_citrus_db_lookup8_by_string(struct _citrus_db *db, const char *key,
+    uint8_t *rval, struct _citrus_db_locator *dl)
+{
+	struct _region r;
+	int ret;
+
+	ret = _citrus_db_lookup_by_string(db, key, &r, dl);
+	if (ret)
+		return (ret);
+
+	if (_region_size(&r) != 1)
+		return (EFTYPE);
+
+	if (rval)
+		memcpy(rval, _region_head(&r), 1);
+
+	return (0);
+}
+
+int
+_citrus_db_lookup16_by_string(struct _citrus_db *db, const char *key,
+    uint16_t *rval, struct _citrus_db_locator *dl)
+{
+	struct _region r;
+	int ret;
+	uint16_t val;
+
+	ret = _citrus_db_lookup_by_string(db, key, &r, dl);
+	if (ret)
+		return (ret);
+
+	if (_region_size(&r) != 2)
+		return (EFTYPE);
+
+	if (rval) {
+		memcpy(&val, _region_head(&r), 2);
+		*rval = be16toh(val);
+	}
+
+	return (0);
+}
+
+int
+_citrus_db_lookup32_by_string(struct _citrus_db *db, const char *key,
+    uint32_t *rval, struct _citrus_db_locator *dl)
+{
+	struct _region r;
+	uint32_t val;
+	int ret;
+
+	ret = _citrus_db_lookup_by_string(db, key, &r, dl);
+	if (ret)
+		return (ret);
+
+	if (_region_size(&r) != 4)
+		return (EFTYPE);
+
+	if (rval) {
+		memcpy(&val, _region_head(&r), 4);
+		*rval = be32toh(val);
+	}
+
+	return (0);
+}
+
+int
+_citrus_db_lookup_string_by_string(struct _citrus_db *db, const char *key,
+    const char **rdata, struct _citrus_db_locator *dl)
+{
+	struct _region r;
+	int ret;
+
+	ret = _citrus_db_lookup_by_string(db, key, &r, dl);
+	if (ret)
+		return (ret);
+
+	/* check whether the string is null terminated */
+	if (_region_size(&r) == 0)
+		return (EFTYPE);
+	if (*((const char*)_region_head(&r)+_region_size(&r)-1) != '\0')
+		return (EFTYPE);
+
+	if (rdata)
+		*rdata = _region_head(&r);
+
+	return (0);
+}
+
+int
+_citrus_db_get_number_of_entries(struct _citrus_db *db)
+{
+	struct _citrus_db_header_x *dhx;
+	struct _memstream ms;
+
+	_memstream_bind(&ms, &db->db_region);
+
+	dhx = _memstream_getregion(&ms, NULL, sizeof(*dhx));
+	return ((int)be32toh(dhx->dhx_num_entries));
+}
+
+int
+_citrus_db_get_entry(struct _citrus_db *db, int idx, struct _region *key,
+    struct _region *data)
+{
+	struct _citrus_db_entry_x *dex;
+	struct _citrus_db_header_x *dhx;
+	struct _memstream ms;
+	uint32_t num_entries;
+	size_t offset;
+
+	_memstream_bind(&ms, &db->db_region);
+
+	dhx = _memstream_getregion(&ms, NULL, sizeof(*dhx));
+	num_entries = be32toh(dhx->dhx_num_entries);
+	if (idx < 0 || (uint32_t)idx >= num_entries)
+		return (EINVAL);
+
+	/* seek to the next entry */
+	offset = be32toh(dhx->dhx_entry_offset) + idx * _CITRUS_DB_ENTRY_SIZE;
+	if (_citrus_memory_stream_seek(&ms, offset, SEEK_SET))
+		return (EFTYPE);
+	/* get the entry record */
+	dex = _memstream_getregion(&ms, NULL, _CITRUS_DB_ENTRY_SIZE);
+	if (dex == NULL)
+		return (EFTYPE);
+	/* seek to the head of the key. */
+	if (_memstream_seek(&ms, be32toh(dex->dex_key_offset), SEEK_SET))
+		return (EFTYPE);
+	/* get the region of the key. */
+	if (_memstream_getregion(&ms, key, be32toh(dex->dex_key_size))==NULL)
+		return (EFTYPE);
+	/* seek to the head of the data. */
+	if (_memstream_seek(&ms, be32toh(dex->dex_data_offset), SEEK_SET))
+		return (EFTYPE);
+	/* get the region of the data. */
+	if (_memstream_getregion(&ms, data, be32toh(dex->dex_data_size))==NULL)
+		return (EFTYPE);
+
+	return (0);
+}