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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* db_query.cc
*
* Copyright (c) 1988-2000 by Sun Microsystems, Inc.
* All Rights Reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "db_headers.h"
#include "db_query.h"
#include "nisdb_mt.h"
#include <string.h>
/* Returns db_query containing the index values as obtained from 'attrlist.' */
db_query::db_query(db_scheme * scheme, int size, nis_attr* attrlist)
{
int i;
num_components = size;
components = new db_qcomp[size];
if (components == NULL) {
num_components = 0;
FATAL(
"db_query::db_query: cannot allocate space for components",
DB_MEMORY_LIMIT);
}
for (i = 0; i < size; i++) {
if (!scheme->find_index(attrlist[i].zattr_ndx,
&(components[i].which_index))) {
syslog(LOG_ERR, "db_query::db_query: bad index (%s)",
attrlist[i].zattr_ndx);
clear_components(i);
return;
}
components[i].index_value = new
item(attrlist[i].zattr_val.zattr_val_val,
attrlist[i].zattr_val.zattr_val_len);
if (components[i].index_value == NULL) {
clear_components(i);
FATAL(
"db_query::db_query:cannot allocate space for index",
DB_MEMORY_LIMIT);
}
}
}
/*
* Returns a newly db_query containing the index values as
* obtained from the given object. The object itself,
* along with information on the scheme given, will determine
* which values are extracted from the object and placed into the query.
* Returns an empty query if 'obj' is not a valid entry.
* Note that space is allocated for the query and the index values
* (i.e. do not share pointers with strings in 'obj'.)
*/
db_query::db_query(db_scheme *scheme, entry_object_p obj)
{
num_components = scheme->numkeys(); // scheme's view of key count
db_key_desc *keyinfo = scheme->keyloc();
int objsize = obj->en_cols.en_cols_len; // total num columns in obj */
struct entry_col * objcols = obj->en_cols.en_cols_val;
/* components of query to be returned */
components = new db_qcomp[num_components];
int wherein_obj, i;
if (components == NULL) {
FATAL(
"db_query::db_query: cannot allocate space for components",
DB_MEMORY_LIMIT);
}
/* fill in each component of query */
for (i = 0; i < num_components; i++) {
components[i].which_index = i; // index i
wherein_obj = keyinfo[i].column_number; // column in entry obj
if (wherein_obj >= objsize) {
syslog(LOG_ERR,
"db_query::column %d cannot occur in object with %d columns (start counting at 0)\n",
wherein_obj, objsize);
clear_components(i); // clean up
return;
}
components[i].index_value = new
item(objcols[wherein_obj].ec_value.ec_value_val,
objcols[wherein_obj].ec_value.ec_value_len);
if (components[i].index_value == NULL) {
clear_components(i);
FATAL(
"db_query::db_query:cannot allocate space for index",
DB_MEMORY_LIMIT);
}
/* do something about null keys? */
}
}
void
db_query::clear_components(int how_many)
{
int i;
if (components) {
for (i = 0; i < how_many; i++)
if (components[i].index_value)
delete components[i].index_value;
delete components;
components = NULL;
}
num_components = 0;
}
/* destructor */
db_query::~db_query()
{
clear_components(num_components);
}
/* Print all components of this query to stdout. */
void
db_query::print()
{
int i;
for (i = 0; i < num_components; i++) {
printf("%d: ", components[i].which_index);
components[i].index_value->print();
putchar('\n');
}
}
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