| /* dbt.c --- DBT-frobbing functions |
| * |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| */ |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <apr_pools.h> |
| #include <apr_md5.h> |
| #include <apr_sha1.h> |
| |
| #define SVN_WANT_BDB |
| #include "svn_private_config.h" |
| |
| #include "../id.h" |
| #include "dbt.h" |
| |
| |
| DBT * |
| svn_fs_base__clear_dbt(DBT *dbt) |
| { |
| memset(dbt, 0, sizeof(*dbt)); |
| |
| return dbt; |
| } |
| |
| |
| DBT *svn_fs_base__nodata_dbt(DBT *dbt) |
| { |
| svn_fs_base__clear_dbt(dbt); |
| |
| /* A `nodata' dbt is one which retrieves zero bytes from offset zero, |
| and stores them in a zero-byte buffer in user-allocated memory. */ |
| dbt->flags |= (DB_DBT_USERMEM | DB_DBT_PARTIAL); |
| dbt->doff = dbt->dlen = 0; |
| |
| return dbt; |
| } |
| |
| |
| DBT * |
| svn_fs_base__set_dbt(DBT *dbt, const void *data, apr_size_t size) |
| { |
| svn_fs_base__clear_dbt(dbt); |
| |
| dbt->data = (void *) data; |
| dbt->size = (u_int32_t) size; |
| |
| return dbt; |
| } |
| |
| |
| DBT * |
| svn_fs_base__result_dbt(DBT *dbt) |
| { |
| svn_fs_base__clear_dbt(dbt); |
| dbt->flags |= DB_DBT_MALLOC; |
| |
| return dbt; |
| } |
| |
| |
| /* An APR pool cleanup function that simply applies `free' to its |
| argument. */ |
| static apr_status_t |
| apr_free_cleanup(void *arg) |
| { |
| free(arg); |
| |
| return 0; |
| } |
| |
| |
| DBT * |
| svn_fs_base__track_dbt(DBT *dbt, apr_pool_t *pool) |
| { |
| if (dbt->data) |
| apr_pool_cleanup_register(pool, dbt->data, apr_free_cleanup, |
| apr_pool_cleanup_null); |
| |
| return dbt; |
| } |
| |
| |
| DBT * |
| svn_fs_base__recno_dbt(DBT *dbt, db_recno_t *recno) |
| { |
| svn_fs_base__set_dbt(dbt, recno, sizeof(*recno)); |
| dbt->ulen = dbt->size; |
| dbt->flags |= DB_DBT_USERMEM; |
| |
| return dbt; |
| } |
| |
| |
| int |
| svn_fs_base__compare_dbt(const DBT *a, const DBT *b) |
| { |
| int common_size = a->size > b->size ? b->size : a->size; |
| int cmp = memcmp(a->data, b->data, common_size); |
| |
| if (cmp) |
| return cmp; |
| else |
| return a->size - b->size; |
| } |
| |
| |
| |
| /* Building DBT's from interesting things. */ |
| |
| |
| /* Set DBT to the unparsed form of ID; allocate memory from POOL. |
| Return DBT. */ |
| DBT * |
| svn_fs_base__id_to_dbt(DBT *dbt, |
| const svn_fs_id_t *id, |
| apr_pool_t *pool) |
| { |
| svn_string_t *unparsed_id = svn_fs_base__id_unparse(id, pool); |
| svn_fs_base__set_dbt(dbt, unparsed_id->data, unparsed_id->len); |
| return dbt; |
| } |
| |
| |
| /* Set DBT to the unparsed form of SKEL; allocate memory from POOL. */ |
| DBT * |
| svn_fs_base__skel_to_dbt(DBT *dbt, |
| svn_skel_t *skel, |
| apr_pool_t *pool) |
| { |
| svn_stringbuf_t *unparsed_skel = svn_skel__unparse(skel, pool); |
| svn_fs_base__set_dbt(dbt, unparsed_skel->data, unparsed_skel->len); |
| return dbt; |
| } |
| |
| |
| /* Set DBT to the text of the null-terminated string STR. DBT will |
| refer to STR's storage. Return DBT. */ |
| DBT * |
| svn_fs_base__str_to_dbt(DBT *dbt, const char *str) |
| { |
| svn_fs_base__set_dbt(dbt, str, strlen(str)); |
| return dbt; |
| } |
| |
| DBT * |
| svn_fs_base__checksum_to_dbt(DBT *dbt, svn_checksum_t *checksum) |
| { |
| svn_fs_base__set_dbt(dbt, checksum->digest, svn_checksum_size(checksum)); |
| |
| return dbt; |
| } |