s3fs-fuse/src/mvnode.cpp
2020-08-26 17:43:50 +09:00

143 lines
3.8 KiB
C++

/*
* s3fs - FUSE-based file system backed by Amazon S3
*
* Copyright(C) 2007 Takeshi Nakatani <ggtakec.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <cstdio>
#include <cstdlib>
#include "common.h"
#include "s3fs.h"
#include "mvnode.h"
//-------------------------------------------------------------------
// Utility functions for moving objects
//-------------------------------------------------------------------
MVNODE *create_mvnode(const char *old_path, const char *new_path, bool is_dir, bool normdir)
{
MVNODE *p;
char *p_old_path;
char *p_new_path;
p = new MVNODE();
if(NULL == (p_old_path = strdup(old_path))){
delete p;
printf("create_mvnode: could not allocation memory for p_old_path\n");
S3FS_FUSE_EXIT();
return NULL;
}
if(NULL == (p_new_path = strdup(new_path))){
delete p;
free(p_old_path);
printf("create_mvnode: could not allocation memory for p_new_path\n");
S3FS_FUSE_EXIT();
return NULL;
}
p->old_path = p_old_path;
p->new_path = p_new_path;
p->is_dir = is_dir;
p->is_normdir = normdir;
p->prev = NULL;
p->next = NULL;
return p;
}
//
// Add sorted MVNODE data(Ascending order)
//
MVNODE *add_mvnode(MVNODE** head, MVNODE** tail, const char *old_path, const char *new_path, bool is_dir, bool normdir)
{
if(!head || !tail){
return NULL;
}
MVNODE* cur;
MVNODE* mvnew;
for(cur = *head; cur; cur = cur->next){
if(cur->is_dir == is_dir){
int nResult = strcmp(cur->old_path, old_path);
if(0 == nResult){
// Found same old_path.
return cur;
}else if(0 > nResult){
// next check.
// ex: cur("abc"), mvnew("abcd")
// ex: cur("abc"), mvnew("abd")
continue;
}else{
// Add into before cur-pos.
// ex: cur("abc"), mvnew("ab")
// ex: cur("abc"), mvnew("abb")
if(NULL == (mvnew = create_mvnode(old_path, new_path, is_dir, normdir))){
return NULL;
}
if(cur->prev){
(cur->prev)->next = mvnew;
}else{
*head = mvnew;
}
mvnew->prev = cur->prev;
mvnew->next = cur;
cur->prev = mvnew;
return mvnew;
}
}
}
// Add into tail.
if(NULL == (mvnew = create_mvnode(old_path, new_path, is_dir, normdir))){
return NULL;
}
mvnew->prev = (*tail);
if(*tail){
(*tail)->next = mvnew;
}
(*tail) = mvnew;
if(!(*head)){
(*head) = mvnew;
}
return mvnew;
}
void free_mvnodes(MVNODE *head)
{
MVNODE *my_head;
MVNODE *next;
for(my_head = head, next = NULL; my_head; my_head = next){
next = my_head->next;
free(my_head->old_path);
free(my_head->new_path);
delete my_head;
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: expandtab sw=4 ts=4 fdm=marker
* vim<600: expandtab sw=4 ts=4
*/