osd-contiki/apps/antelope/antelope.c

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/*
* 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
2011-12-08 15:57:11 +01:00
* 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));
break;
}
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;
}