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/*
Unix SMB/CIFS implementation.
file_id structure handling
Copyright (C) Andrew Tridgell 2007
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
return a file_id which gives a unique ID for a file given the device and
inode numbers
*/
struct file_id file_id_create(SMB_DEV_T dev, SMB_INO_T inode)
{
struct file_id key;
/* the ZERO_STRUCT ensures padding doesn't break using the key as a
* blob */
ZERO_STRUCT(key);
key.devid = dev;
key.inode = inode;
return key;
}
/*
generate a file_id from a stat structure
*/
struct file_id file_id_sbuf(const SMB_STRUCT_STAT *sbuf)
{
return file_id_create(sbuf->st_dev, sbuf->st_ino);
}
/*
return True if two file_id structures are equal
*/
BOOL file_id_equal(const struct file_id *id1, const struct file_id *id2)
{
return id1->inode == id2->inode && id1->devid == id2->devid;
}
/*
a static string for a file_id structure
*/
const char *file_id_static_string(const struct file_id *id)
{
static char buf[32];
snprintf(buf, sizeof(buf), "%llx:%llx",
(unsigned long long)id->devid,
(unsigned long long)id->inode);
return buf;
}
/*
a 2nd static string for a file_id structure so we can print 2 at once
*/
const char *file_id_static_string2(const struct file_id *id)
{
static char buf[32];
snprintf(buf, sizeof(buf), "%llx:%llx",
(unsigned long long)id->devid,
(unsigned long long)id->inode);
return buf;
}
/*
push a 16 byte version of a file id into a buffer
*/
void push_file_id_16(char *buf, const struct file_id *id)
{
SIVAL(buf, 0, id->devid&0xFFFFFFFF);
SIVAL(buf, 4, id->devid>>32);
SIVAL(buf, 8, id->inode&0xFFFFFFFF);
SIVAL(buf, 12, id->inode>>32);
}
/*
pul a 16 byte version of a file id from a buffer
*/
void pull_file_id_16(char *buf, struct file_id *id)
{
ZERO_STRUCTP(id);
id->devid = IVAL(buf, 0);
id->devid |= ((uint64_t)IVAL(buf,4))<<32;
id->inode = IVAL(buf, 8);
id->inode |= ((uint64_t)IVAL(buf,12))<<32;
}
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