/* * Copyright (c) 2010, Swedish Institute of Computer Science * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /** * \file * Main functions for Antelope, a DBMS for sensor devices. * * Antelope is described and evaluated in the paper A Database in * Every Sensor, N. Tsiftes and A. Dunkels, in Proceedings of * ACM SenSys 2011. * \author * Nicolas Tsiftes <nvt@sics.se> */ #include <stdio.h> #include "antelope.h" static db_output_function_t output = printf; void db_init(void) { relation_init(); index_init(); } void db_set_output_function(db_output_function_t f) { output = f; } const char * db_get_result_message(db_result_t code) { switch(code) { case DB_FINISHED: return "Iteration finished"; case DB_OK: return "Operation succeeded"; case DB_LIMIT_ERROR: return "Limit reached"; case DB_ALLOCATION_ERROR: return "Allocation error"; case DB_STORAGE_ERROR: return "Storage error"; case DB_PARSING_ERROR: return "Parsing error"; case DB_NAME_ERROR: return "Invalid name"; case DB_RELATIONAL_ERROR: return "Semantic error"; case DB_TYPE_ERROR: return "Type error"; case DB_IMPLEMENTATION_ERROR: return "Implementation error"; case DB_INDEX_ERROR: return "Index error"; case DB_BUSY_ERROR: return "Busy with processing"; case DB_INCONSISTENCY_ERROR: return "Inconsistent handle"; case DB_ARGUMENT_ERROR: return "Invalid argument"; default: return "Unknown result code"; }; } db_result_t db_print_header(db_handle_t *handle) { int column; attribute_t *attr; output("[relation = %s, attributes = (", handle->result_rel->name); attr = list_head(handle->result_rel->attributes); for(column = 0; column < handle->ncolumns; column++) { if(attr == NULL) { return DB_IMPLEMENTATION_ERROR; } else if(attr->flags & ATTRIBUTE_FLAG_NO_STORE) { continue; } output("%s%s", column > 0 ? ", " : "", attr->name); attr = attr->next; } output(")]\n"); return DB_OK; } db_result_t db_print_tuple(db_handle_t *handle) { int column; attribute_value_t value; db_result_t result; output("Row %lu:\t", (unsigned long)handle->current_row); for(column = 0; column < handle->ncolumns; column++) { result = db_get_value(&value, handle, column); if(DB_ERROR(result)) { output("Unable to get the value for row %lu, column %u: %s\n", (unsigned long)handle->current_row, column, db_get_result_message(result)); return result; } switch(value.domain) { case DOMAIN_STRING: output("\"%s\"\t", VALUE_STRING(&value)); break; case DOMAIN_INT: output("%d\t", (int)VALUE_INT(&value)); break; case DOMAIN_LONG: output("%ld\t", (long)VALUE_LONG(&value)); break; default: output("\nUnrecognized domain: %d\n", value.domain); return DB_IMPLEMENTATION_ERROR; } } output("\n"); return DB_OK; } int db_processing(db_handle_t *handle) { return handle->flags & DB_HANDLE_FLAG_PROCESSING; }