diff options
Diffstat (limited to 'subversion/libsvn_fs_base/id.c')
| -rw-r--r-- | subversion/libsvn_fs_base/id.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/subversion/libsvn_fs_base/id.c b/subversion/libsvn_fs_base/id.c new file mode 100644 index 0000000..c063d02 --- /dev/null +++ b/subversion/libsvn_fs_base/id.c @@ -0,0 +1,208 @@ +/* id.c : operations on node-revision IDs + * + * ==================================================================== + * 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 <string.h> +#include <stdlib.h> + +#include "id.h" +#include "../libsvn_fs/fs-loader.h" + + + +typedef struct id_private_t { + const char *node_id; + const char *copy_id; + const char *txn_id; +} id_private_t; + + +/* Accessing ID Pieces. */ + +const char * +svn_fs_base__id_node_id(const svn_fs_id_t *id) +{ + id_private_t *pvt = id->fsap_data; + + return pvt->node_id; +} + + +const char * +svn_fs_base__id_copy_id(const svn_fs_id_t *id) +{ + id_private_t *pvt = id->fsap_data; + + return pvt->copy_id; +} + + +const char * +svn_fs_base__id_txn_id(const svn_fs_id_t *id) +{ + id_private_t *pvt = id->fsap_data; + + return pvt->txn_id; +} + + +svn_string_t * +svn_fs_base__id_unparse(const svn_fs_id_t *id, + apr_pool_t *pool) +{ + id_private_t *pvt = id->fsap_data; + + return svn_string_createf(pool, "%s.%s.%s", + pvt->node_id, pvt->copy_id, pvt->txn_id); +} + + +/*** Comparing node IDs ***/ + +svn_boolean_t +svn_fs_base__id_eq(const svn_fs_id_t *a, + const svn_fs_id_t *b) +{ + id_private_t *pvta = a->fsap_data, *pvtb = b->fsap_data; + + if (a == b) + return TRUE; + if (strcmp(pvta->node_id, pvtb->node_id) != 0) + return FALSE; + if (strcmp(pvta->copy_id, pvtb->copy_id) != 0) + return FALSE; + if (strcmp(pvta->txn_id, pvtb->txn_id) != 0) + return FALSE; + return TRUE; +} + + +svn_boolean_t +svn_fs_base__id_check_related(const svn_fs_id_t *a, + const svn_fs_id_t *b) +{ + id_private_t *pvta = a->fsap_data, *pvtb = b->fsap_data; + + if (a == b) + return TRUE; + + return (strcmp(pvta->node_id, pvtb->node_id) == 0); +} + + +int +svn_fs_base__id_compare(const svn_fs_id_t *a, + const svn_fs_id_t *b) +{ + if (svn_fs_base__id_eq(a, b)) + return 0; + return (svn_fs_base__id_check_related(a, b) ? 1 : -1); +} + + + +/* Creating ID's. */ + +static id_vtable_t id_vtable = { + svn_fs_base__id_unparse, + svn_fs_base__id_compare +}; + + +svn_fs_id_t * +svn_fs_base__id_create(const char *node_id, + const char *copy_id, + const char *txn_id, + apr_pool_t *pool) +{ + svn_fs_id_t *id = apr_palloc(pool, sizeof(*id)); + id_private_t *pvt = apr_palloc(pool, sizeof(*pvt)); + + pvt->node_id = apr_pstrdup(pool, node_id); + pvt->copy_id = apr_pstrdup(pool, copy_id); + pvt->txn_id = apr_pstrdup(pool, txn_id); + id->vtable = &id_vtable; + id->fsap_data = pvt; + return id; +} + + +svn_fs_id_t * +svn_fs_base__id_copy(const svn_fs_id_t *id, apr_pool_t *pool) +{ + svn_fs_id_t *new_id = apr_palloc(pool, sizeof(*new_id)); + id_private_t *new_pvt = apr_palloc(pool, sizeof(*new_pvt)); + id_private_t *pvt = id->fsap_data; + + new_pvt->node_id = apr_pstrdup(pool, pvt->node_id); + new_pvt->copy_id = apr_pstrdup(pool, pvt->copy_id); + new_pvt->txn_id = apr_pstrdup(pool, pvt->txn_id); + new_id->vtable = &id_vtable; + new_id->fsap_data = new_pvt; + return new_id; +} + + +svn_fs_id_t * +svn_fs_base__id_parse(const char *data, + apr_size_t len, + apr_pool_t *pool) +{ + svn_fs_id_t *id; + id_private_t *pvt; + char *data_copy, *str; + + /* Dup the ID data into POOL. Our returned ID will have references + into this memory. */ + data_copy = apr_pstrmemdup(pool, data, len); + + /* Alloc a new svn_fs_id_t structure. */ + id = apr_palloc(pool, sizeof(*id)); + pvt = apr_palloc(pool, sizeof(*pvt)); + id->vtable = &id_vtable; + id->fsap_data = pvt; + + /* Now, we basically just need to "split" this data on `.' + characters. We will use svn_cstring_tokenize, which will put + terminators where each of the '.'s used to be. Then our new + id field will reference string locations inside our duplicate + string.*/ + + /* Node Id */ + str = svn_cstring_tokenize(".", &data_copy); + if (str == NULL) + return NULL; + pvt->node_id = str; + + /* Copy Id */ + str = svn_cstring_tokenize(".", &data_copy); + if (str == NULL) + return NULL; + pvt->copy_id = str; + + /* Txn Id */ + str = svn_cstring_tokenize(".", &data_copy); + if (str == NULL) + return NULL; + pvt->txn_id = str; + + return id; +} |
