1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * db_query.cc 24 * 25 * Copyright (c) 1988-2000 by Sun Microsystems, Inc. 26 * All Rights Reserved. 27 */ 28 29 #include "db_headers.h" 30 #include "db_query.h" 31 #include "nisdb_mt.h" 32 #include <stdio.h> 33 #include <string.h> 34 35 /* Returns db_query containing the index values as obtained from 'attrlist.' */ 36 db_query::db_query(db_scheme * scheme, int size, nis_attr* attrlist) 37 { 38 int i; 39 num_components = size; 40 components = new db_qcomp[size]; 41 42 if (components == NULL) { 43 num_components = 0; 44 FATAL( 45 "db_query::db_query: cannot allocate space for components", 46 DB_MEMORY_LIMIT); 47 } 48 49 for (i = 0; i < size; i++) { 50 if (!scheme->find_index(attrlist[i].zattr_ndx, 51 &(components[i].which_index))) { 52 syslog(LOG_ERR, "db_query::db_query: bad index (%s)", 53 attrlist[i].zattr_ndx); 54 clear_components(i); 55 return; 56 } 57 components[i].index_value = new 58 item(attrlist[i].zattr_val.zattr_val_val, 59 attrlist[i].zattr_val.zattr_val_len); 60 if (components[i].index_value == NULL) { 61 clear_components(i); 62 FATAL( 63 "db_query::db_query:cannot allocate space for index", 64 DB_MEMORY_LIMIT); 65 } 66 } 67 } 68 69 /* 70 * Returns a newly db_query containing the index values as 71 * obtained from the given object. The object itself, 72 * along with information on the scheme given, will determine 73 * which values are extracted from the object and placed into the query. 74 * Returns an empty query if 'obj' is not a valid entry. 75 * Note that space is allocated for the query and the index values 76 * (i.e. do not share pointers with strings in 'obj'.) 77 */ 78 db_query::db_query(db_scheme *scheme, entry_object_p obj) 79 { 80 num_components = scheme->numkeys(); // scheme's view of key count 81 db_key_desc *keyinfo = scheme->keyloc(); 82 83 int objsize = obj->en_cols.en_cols_len; // total num columns in obj */ 84 struct entry_col * objcols = obj->en_cols.en_cols_val; 85 86 /* components of query to be returned */ 87 components = new db_qcomp[num_components]; 88 89 int wherein_obj, i; 90 if (components == NULL) { 91 FATAL( 92 "db_query::db_query: cannot allocate space for components", 93 DB_MEMORY_LIMIT); 94 } 95 96 /* fill in each component of query */ 97 for (i = 0; i < num_components; i++) { 98 components[i].which_index = i; // index i 99 wherein_obj = keyinfo[i].column_number; // column in entry obj 100 if (wherein_obj >= objsize) { 101 syslog(LOG_ERR, 102 "db_query::column %d cannot occur in object with %d columns (start counting at 0)\n", 103 wherein_obj, objsize); 104 clear_components(i); // clean up 105 return; 106 } 107 108 components[i].index_value = new 109 item(objcols[wherein_obj].ec_value.ec_value_val, 110 objcols[wherein_obj].ec_value.ec_value_len); 111 if (components[i].index_value == NULL) { 112 clear_components(i); 113 FATAL( 114 "db_query::db_query:cannot allocate space for index", 115 DB_MEMORY_LIMIT); 116 } 117 118 /* do something about null keys? */ 119 } 120 } 121 122 void 123 db_query::clear_components(int how_many) 124 { 125 int i; 126 if (components) { 127 for (i = 0; i < how_many; i++) 128 if (components[i].index_value) 129 delete components[i].index_value; 130 delete components; 131 components = NULL; 132 } 133 num_components = 0; 134 } 135 136 /* destructor */ 137 db_query::~db_query() 138 { 139 clear_components(num_components); 140 } 141 142 /* Print all components of this query to stdout. */ 143 void 144 db_query::print() 145 { 146 int i; 147 for (i = 0; i < num_components; i++) { 148 printf("%d: ", components[i].which_index); 149 components[i].index_value->print(); 150 putchar('\n'); 151 } 152 } 153