NetBSD-5.0.2/lib/libc/citrus/citrus_esdb.c
/* $NetBSD: citrus_esdb.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>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_esdb.c,v 1.5 2008/02/09 14:56:20 junyoung Exp $");
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <paths.h>
#include <sys/types.h>
#include "citrus_namespace.h"
#include "citrus_types.h"
#include "citrus_bcs.h"
#include "citrus_region.h"
#include "citrus_memstream.h"
#include "citrus_mmap.h"
#include "citrus_lookup.h"
#include "citrus_db.h"
#include "citrus_db_hash.h"
#include "citrus_esdb.h"
#include "citrus_esdb_file.h"
#define ESDB_DIR "esdb.dir"
#define ESDB_ALIAS "esdb.alias"
/*
* _citrus_esdb_alias:
* resolve encoding scheme name aliases.
*/
const char *
_citrus_esdb_alias(const char *esname, char *buf, size_t bufsize)
{
return _lookup_alias(_PATH_ESDB "/" ESDB_ALIAS, esname, buf, bufsize,
_LOOKUP_CASE_IGNORE);
}
/*
* conv_esdb:
* external representation -> local structure.
*/
static int
conv_esdb(struct _citrus_esdb *esdb, struct _region *fr)
{
int ret;
struct _citrus_db *db;
uint32_t version, num_charsets, csid, i, tmp;
char buf[100];
const char *str;
/* open db */
ret = _db_open(&db, fr, _CITRUS_ESDB_MAGIC, &_db_hash_std, NULL);
if (ret)
goto err0;
/* check version */
ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_VERSION, &version, NULL);
if (ret)
goto err1;
switch (version) {
case 0x00000001:
/* current version */
/* initial version */
break;
default:
ret = EFTYPE;
goto err1;
}
/* get encoding/variable */
ret = _db_lookupstr_by_s(db, _CITRUS_ESDB_SYM_ENCODING, &str, NULL);
if (ret)
goto err1;
esdb->db_encname = strdup(str);
if (esdb->db_encname == NULL) {
ret = errno;
goto err1;
}
esdb->db_len_variable = 0;
esdb->db_variable = NULL;
ret = _db_lookupstr_by_s(db, _CITRUS_ESDB_SYM_VARIABLE, &str, NULL);
if (ret == 0) {
esdb->db_len_variable = strlen(str)+1;
esdb->db_variable = strdup(str);
if (esdb->db_variable == NULL) {
ret = errno;
goto err2;
}
} else if (ret != ENOENT)
goto err2;
/* get number of charsets */
ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_NUM_CHARSETS,
&num_charsets, NULL);
if (ret)
goto err3;
esdb->db_num_charsets = num_charsets;
/* get invalid character */
ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_INVALID, &tmp, NULL);
if (ret == 0) {
esdb->db_use_invalid = 1;
esdb->db_invalid = tmp;
} else if (ret == ENOENT)
esdb->db_use_invalid = 0;
else
goto err3;
/* get charsets */
esdb->db_charsets = malloc(num_charsets * sizeof(*esdb->db_charsets));
if (esdb->db_charsets == NULL) {
ret = errno;
goto err3;
}
for (i = 0; i < num_charsets; i++) {
snprintf(buf, sizeof(buf),
_CITRUS_ESDB_SYM_CSID_PREFIX "%d", i);
ret = _db_lookup32_by_s(db, buf, &csid, NULL);
if (ret)
goto err4;
esdb->db_charsets[i].ec_csid = csid;
snprintf(buf, sizeof(buf),
_CITRUS_ESDB_SYM_CSNAME_PREFIX "%d", i);
ret = _db_lookupstr_by_s(db, buf, &str, NULL);
if (ret)
goto err4;
esdb->db_charsets[i].ec_csname = strdup(str);
if (esdb->db_charsets[i].ec_csname == NULL) {
ret = errno;
goto err4;
}
}
_db_close(db);
return 0;
err4:
for (; i > 0; i--)
free(esdb->db_charsets[i - 1].ec_csname);
free(esdb->db_charsets);
err3:
free(esdb->db_variable);
err2:
free(esdb->db_encname);
err1:
_db_close(db);
if (ret == ENOENT)
ret = EFTYPE;
err0:
return ret;
}
/*
* _citrus_esdb_open:
* open an ESDB file.
*/
int
_citrus_esdb_open(struct _citrus_esdb *db, const char *esname)
{
int ret;
const char *realname, *encfile;
char buf1[PATH_MAX], buf2[PATH_MAX], path[PATH_MAX];
struct _region fr;
_DIAGASSERT(esname != NULL);
snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, ESDB_ALIAS);
realname = _lookup_alias(path, esname, buf1, sizeof(buf1),
_LOOKUP_CASE_IGNORE);
snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, ESDB_DIR);
encfile = _lookup_simple(path, realname, buf2, sizeof(buf2),
_LOOKUP_CASE_IGNORE);
if (encfile==NULL)
return ENOENT;
/* open file */
snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, encfile);
ret = _map_file(&fr, path);
if (ret)
return ret;
ret = conv_esdb(db, &fr);
_unmap_file(&fr);
return ret;
}
/*
* _citrus_esdb_close:
* free an ESDB.
*/
void
_citrus_esdb_close(struct _citrus_esdb *db)
{
int i;
_DIAGASSERT(db != NULL);
_DIAGASSERT(db->db_num_charsets == 0 || db->db_charsets != NULL);
for (i = 0; i < db->db_num_charsets; i++)
free(db->db_charsets[i].ec_csname);
db->db_num_charsets = 0;
free(db->db_charsets); db->db_charsets = NULL;
free(db->db_encname); db->db_encname = NULL;
db->db_len_variable = 0;
free(db->db_variable); db->db_variable = NULL;
}
/*
* _citrus_esdb_free_list:
* free the list.
*/
void
_citrus_esdb_free_list(char **list, size_t num)
{
size_t i;
for (i = 0; i < num; i++)
free(list[i]);
free(list);
}
/*
* _citrus_esdb_get_list:
* get esdb entries.
*/
int
_citrus_esdb_get_list(char ***rlist, size_t *rnum)
{
int ret;
struct _region key;
size_t num;
struct _citrus_lookup *cla, *cld;
char **list, **q;
char buf[PATH_MAX];
num = 0;
ret = _lookup_seq_open(&cla, _PATH_ESDB "/" ESDB_ALIAS,
_LOOKUP_CASE_IGNORE);
if (ret)
goto quit0;
ret = _lookup_seq_open(&cld, _PATH_ESDB "/" ESDB_DIR,
_LOOKUP_CASE_IGNORE);
if (ret)
goto quit1;
/* count number of entries */
num = _lookup_get_num_entries(cla) + _lookup_get_num_entries(cld);
_lookup_seq_rewind(cla);
_lookup_seq_rewind(cld);
/* allocate list pointer space */
list = malloc(num * sizeof(char *));
num = 0;
if (list == NULL) {
ret = errno;
goto quit3;
}
/* get alias entries */
while ((ret = _lookup_seq_next(cla, &key, NULL)) == 0) {
snprintf(buf, sizeof(buf), "%.*s",
(int)_region_size(&key),
(const char *)_region_head(&key));
_bcs_convert_to_lower(buf);
list[num] = strdup(buf);
if (list[num] == NULL) {
ret = errno;
goto quit3;
}
num++;
}
if (ret != ENOENT)
goto quit3;
/* get dir entries */
while ((ret = _lookup_seq_next(cld, &key, NULL)) == 0) {
/* check duplicated entry */
snprintf(buf, sizeof(buf), "%.*s",
(int)_region_size(&key),
(const char *)_region_head(&key));
_bcs_convert_to_lower(buf);
ret = _lookup_seq_lookup(cla, buf, NULL);
if (ret) {
if (ret != ENOENT)
goto quit3;
/* not duplicated */
list[num] = strdup(buf);
if (list[num] == NULL) {
ret = errno;
goto quit3;
}
num++;
}
}
if (ret != ENOENT)
goto quit3;
ret = 0;
q = realloc(list, num * sizeof(char *));
if (!q) {
ret = ENOMEM;
goto quit3;
}
list = q;
*rlist = list;
*rnum = num;
quit3:
if (ret)
_citrus_esdb_free_list(list, num);
_lookup_seq_close(cld);
quit1:
_lookup_seq_close(cla);
quit0:
return ret;
}