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/* fs-util.c : internal utility functions used by both FSFS and BDB back
* ends.
*
* ====================================================================
* 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 <apr_pools.h>
#include <apr_strings.h>
#include "svn_hash.h"
#include "svn_fs.h"
#include "svn_dirent_uri.h"
#include "svn_path.h"
#include "svn_private_config.h"
#include "private/svn_fs_util.h"
#include "private/svn_fspath.h"
#include "../libsvn_fs/fs-loader.h"
/* Return TRUE, if PATH of PATH_LEN > 0 chars starts with a '/' and does
* not end with a '/' and does not contain duplicate '/'.
*/
static svn_boolean_t
is_canonical_abspath(const char *path, size_t path_len)
{
const char *end;
/* check for leading '/' */
if (path[0] != '/')
return FALSE;
/* check for trailing '/' */
if (path_len == 1)
return TRUE;
if (path[path_len - 1] == '/')
return FALSE;
/* check for "//" */
end = path + path_len - 1;
for (; path != end; ++path)
if ((path[0] == '/') && (path[1] == '/'))
return FALSE;
return TRUE;
}
svn_boolean_t
svn_fs__is_canonical_abspath(const char *path)
{
/* No PATH? No problem. */
if (! path)
return TRUE;
/* Empty PATH? That's just "/". */
if (! *path)
return FALSE;
/* detailed checks */
return is_canonical_abspath(path, strlen(path));
}
const char *
svn_fs__canonicalize_abspath(const char *path, apr_pool_t *pool)
{
char *newpath;
size_t path_len;
size_t path_i = 0, newpath_i = 0;
svn_boolean_t eating_slashes = FALSE;
/* No PATH? No problem. */
if (! path)
return NULL;
/* Empty PATH? That's just "/". */
if (! *path)
return "/";
/* Non-trivial cases. Maybe, the path already is canonical after all? */
path_len = strlen(path);
if (is_canonical_abspath(path, path_len))
return apr_pstrmemdup(pool, path, path_len);
/* Now, the fun begins. Alloc enough room to hold PATH with an
added leading '/'. */
newpath = apr_palloc(pool, path_len + 2);
/* No leading slash? Fix that. */
if (*path != '/')
{
newpath[newpath_i++] = '/';
}
for (path_i = 0; path_i < path_len; path_i++)
{
if (path[path_i] == '/')
{
/* The current character is a '/'. If we are eating up
extra '/' characters, skip this character. Else, note
that we are now eating slashes. */
if (eating_slashes)
continue;
eating_slashes = TRUE;
}
else
{
/* The current character is NOT a '/'. If we were eating
slashes, we need not do that any more. */
if (eating_slashes)
eating_slashes = FALSE;
}
/* Copy the current character into our new buffer. */
newpath[newpath_i++] = path[path_i];
}
/* Did we leave a '/' attached to the end of NEWPATH (other than in
the root directory case)? */
if ((newpath[newpath_i - 1] == '/') && (newpath_i > 1))
newpath[newpath_i - 1] = '\0';
else
newpath[newpath_i] = '\0';
return newpath;
}
svn_error_t *
svn_fs__check_fs(svn_fs_t *fs,
svn_boolean_t expect_open)
{
if ((expect_open && fs->fsap_data)
|| ((! expect_open) && (! fs->fsap_data)))
return SVN_NO_ERROR;
if (expect_open)
return svn_error_create(SVN_ERR_FS_NOT_OPEN, 0,
_("Filesystem object has not been opened yet"));
else
return svn_error_create(SVN_ERR_FS_ALREADY_OPEN, 0,
_("Filesystem object already open"));
}
char *
svn_fs__next_entry_name(const char **next_p,
const char *path,
apr_pool_t *pool)
{
const char *end;
/* Find the end of the current component. */
end = strchr(path, '/');
if (! end)
{
/* The path contains only one component, with no trailing
slashes. */
*next_p = 0;
return apr_pstrdup(pool, path);
}
else
{
/* There's a slash after the first component. Skip over an arbitrary
number of slashes to find the next one. */
const char *next = end;
while (*next == '/')
next++;
*next_p = next;
return apr_pstrndup(pool, path, end - path);
}
}
svn_fs_path_change2_t *
svn_fs__path_change_create_internal(const svn_fs_id_t *node_rev_id,
svn_fs_path_change_kind_t change_kind,
apr_pool_t *pool)
{
svn_fs_path_change2_t *change;
change = apr_pcalloc(pool, sizeof(*change));
change->node_rev_id = node_rev_id;
change->change_kind = change_kind;
return change;
}
svn_error_t *
svn_fs__append_to_merged_froms(svn_mergeinfo_t *output,
svn_mergeinfo_t input,
const char *rel_path,
apr_pool_t *pool)
{
apr_hash_index_t *hi;
*output = apr_hash_make(pool);
for (hi = apr_hash_first(pool, input); hi; hi = apr_hash_next(hi))
{
const char *path = svn__apr_hash_index_key(hi);
svn_rangelist_t *rangelist = svn__apr_hash_index_val(hi);
svn_hash_sets(*output,
svn_fspath__join(path, rel_path, pool),
svn_rangelist_dup(rangelist, pool));
}
return SVN_NO_ERROR;
}
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