File content as of revision 0:b438482ebbfc:

/**
 * @file    InstancePointerTable.h
 * @brief   instance pointer table header
 * @author  Doug Anson/Chris Paola
 * @version 1.0
 * @see     
 *
 * Copyright (c) 2014
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
 #include "InstancePointerTable.h"
 
 // constructor
 InstancePointerTable::InstancePointerTable(const Logger *logger) {
     this->m_logger = (Logger *)logger;
 }
 
 // destructor
 InstancePointerTable::~InstancePointerTable() {
 }
 
 // add to the table
 void InstancePointerTable::add(string key,void *instance) {
     // get our index
     int index = this->indexFromKey(key);
     if (index >= 0) {
         // overwrite the existing reference we have...
         std::printf("InstancePointerTable: ADD(overwrite) instance: key[%s] index=%d\r\n",key.c_str(),index);
         this->m_instance_pointer_table[index].instance = instance;
    }
    else {
        // get the next empty slot
        index = this->nextEmptySlot();
        if (index >= 0) {        
            // set the table entry
            this->m_instance_pointer_table[index].key = key;
            this->m_instance_pointer_table[index].instance = instance;
            std::printf("InstancePointerTable: ADD instance: key[%s] index=%d\r\n",key.c_str(),index);
        }
        else {
            // table is FULL!  Error...
            std::printf("ERROR: InstancePointerTable is FULL... please expand table\r\n");
        }
    }
 }
 
 // get from the table
 void *InstancePointerTable::get(string key) {    
    // get our index
    int index = this->indexFromKey(key);
    if (index >= 0) {
        std::printf("InstancePointerTable: GET instance: key[%s] index=%d\r\n",key.c_str(),index);
        return this->m_instance_pointer_table[index].instance;
    }
    return NULL;
 }
 
 // find next empty slot
 int InstancePointerTable::nextEmptySlot() { return this->indexFromKey(""); }
 
 // lookup into the table
 int InstancePointerTable::indexFromKey(string key) {
     int index = -1;
     bool found = false;
     
     for(int i=0;i<IPT_MAX_ENTRIES && !found;++i) {
        if (this->m_instance_pointer_table[i].key.compare(key) == 0) {
            found = true;
            index = i;
        }
     }
     
     return index;
 } 
 
 // initialize
 void InstancePointerTable::init() {
     for(int i=0;i<IPT_MAX_ENTRIES;++i) {
         this->m_instance_pointer_table[i].key = "";
         this->m_instance_pointer_table[i].instance = NULL;
     }
 }
 
 // set our logger
 void InstancePointerTable::setLogger(const Logger *logger) { this->m_logger = (Logger *)logger; }
 
 // get our logger
 Logger *InstancePointerTable::logger() { return this->m_logger; }