freebsd-dev/contrib/global/lib/pathop.c
Hidetoshi Shimokawa 3ba3e2cc4b Import Global v3_4_2 sources.
Ok'd by: peter
Discussed with: msmith
1999-01-18 06:59:18 +00:00

156 lines
3.6 KiB
C

/*
* Copyright (c) 1996, 1997, 1998 Shigio Yamaguchi. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Shigio Yamaguchi.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* pathop.c 12-Nov-98
*
*/
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "die.h"
#include "dbop.h"
#include "makepath.h"
#include "pathop.h"
static DBOP *dbop;
static const char *gpath = "GPATH";
static int _nextkey;
static int _mode;
static int opened;
static int created;
/*
* pathopen: open path dictionary tag.
*
* i) mode 0: read only
* 1: create
* 2: modify
* r) 0: normal
* -1: error
*/
int
pathopen(dbpath, mode)
char *dbpath;
int mode;
{
char *p;
assert(opened == 0);
/*
* We create GPATH just first time.
*/
_mode = mode;
if (mode == 1 && created)
mode = 0;
dbop = dbop_open(makepath(dbpath, gpath), mode, 0644, 0);
if (dbop == NULL)
return -1;
if (mode == 1)
_nextkey = 0;
else {
if (!(p = dbop_get(dbop, NEXTKEY)))
die("nextkey not found in GPATH.");
_nextkey = atoi(p);
}
opened = 1;
return 0;
}
void
pathput(path)
char *path;
{
char buf[10];
assert(opened == 1);
if (_mode == 1 && created)
return;
if (dbop_get(dbop, path) != NULL)
return;
sprintf(buf, "%d", _nextkey++);
dbop_put(dbop, path, buf);
dbop_put(dbop, buf, path);
}
char *
pathget(key)
char *key;
{
assert(opened == 1);
return dbop_get(dbop, key);
}
char *
pathiget(n)
int n;
{
char key[80];
assert(opened == 1);
sprintf(key, "%d", n);
return dbop_get(dbop, key);
}
void
pathdel(key)
char *key;
{
char *d;
assert(opened == 1);
assert(_mode == 2);
assert(key[0] == '.' && key[1] == '/');
d = dbop_get(dbop, key);
if (d == NULL)
return;
dbop_del(dbop, d);
dbop_del(dbop, key);
}
int
nextkey(void)
{
assert(_mode != 1);
return _nextkey;
}
void
pathclose(void)
{
char buf[10];
assert(opened == 1);
opened = 0;
if (_mode == 1 && created) {
dbop_close(dbop);
return;
}
sprintf(buf, "%d", _nextkey);
if (_mode == 1 || _mode == 2)
dbop_put(dbop, NEXTKEY, buf);
dbop_close(dbop);
if (_mode == 1)
created = 1;
}