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