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161 lines
4.4 KiB
C
161 lines
4.4 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science
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* 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. Neither the name of the Institute nor the names of its 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 INSTITUTE 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 INSTITUTE 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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/**
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* \file
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* Main functions for Antelope, a DBMS for sensor devices.
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*
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* Antelope is described and evaluated in the paper A Database in
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* Every Sensor, N. Tsiftes and A. Dunkels, in Proceedings of
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* ACM SenSys 2011.
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* \author
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* Nicolas Tsiftes <nvt@sics.se>
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*/
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#include <stdio.h>
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#include "antelope.h"
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static db_output_function_t output = printf;
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void
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db_init(void)
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{
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relation_init();
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index_init();
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}
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void
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db_set_output_function(db_output_function_t f)
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{
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output = f;
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}
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const char *
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db_get_result_message(db_result_t code)
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{
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switch(code) {
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case DB_FINISHED:
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return "Iteration finished";
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case DB_OK:
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return "Operation succeeded";
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case DB_LIMIT_ERROR:
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return "Limit reached";
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case DB_ALLOCATION_ERROR:
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return "Allocation error";
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case DB_STORAGE_ERROR:
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return "Storage error";
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case DB_PARSING_ERROR:
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return "Parsing error";
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case DB_NAME_ERROR:
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return "Invalid name";
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case DB_RELATIONAL_ERROR:
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return "Semantic error";
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case DB_TYPE_ERROR:
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return "Type error";
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case DB_IMPLEMENTATION_ERROR:
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return "Implementation error";
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case DB_INDEX_ERROR:
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return "Index error";
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case DB_BUSY_ERROR:
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return "Busy with processing";
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case DB_INCONSISTENCY_ERROR:
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return "Inconsistent handle";
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case DB_ARGUMENT_ERROR:
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return "Invalid argument";
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default:
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return "Unknown result code";
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};
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}
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db_result_t
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db_print_header(db_handle_t *handle)
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{
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int column;
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attribute_t *attr;
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output("[relation = %s, attributes = (", handle->result_rel->name);
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attr = list_head(handle->result_rel->attributes);
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for(column = 0; column < handle->ncolumns; column++) {
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if(attr == NULL) {
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return DB_IMPLEMENTATION_ERROR;
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} else if(attr->flags & ATTRIBUTE_FLAG_NO_STORE) {
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continue;
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}
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output("%s%s", column > 0 ? ", " : "", attr->name);
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attr = attr->next;
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}
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output(")]\n");
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return DB_OK;
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}
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db_result_t
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db_print_tuple(db_handle_t *handle)
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{
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int column;
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attribute_value_t value;
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db_result_t result;
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output("Row %lu:\t", (unsigned long)handle->current_row);
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for(column = 0; column < handle->ncolumns; column++) {
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result = db_get_value(&value, handle, column);
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if(DB_ERROR(result)) {
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output("Unable to get the value for row %lu, column %u: %s\n",
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(unsigned long)handle->current_row, column,
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db_get_result_message(result));
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return result;
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}
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switch(value.domain) {
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case DOMAIN_STRING:
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output("\"%s\"\t", VALUE_STRING(&value));
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break;
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case DOMAIN_INT:
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output("%d\t", (int)VALUE_INT(&value));
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break;
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case DOMAIN_LONG:
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output("%ld\t", (long)VALUE_LONG(&value));
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break;
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default:
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output("\nUnrecognized domain: %d\n", value.domain);
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return DB_IMPLEMENTATION_ERROR;
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}
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}
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output("\n");
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return DB_OK;
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}
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int
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db_processing(db_handle_t *handle)
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{
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return handle->flags & DB_HANDLE_FLAG_PROCESSING;
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}
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