mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-21 19:29:18 +00:00
150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Utilities for building the internal representation of an AQL command.
|
|
* \author
|
|
* Nicolas Tsiftes <nvt@sics.se>
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "aql.h"
|
|
|
|
#define DEBUG DEBUG_NONE
|
|
#include "net/uip-debug.h"
|
|
|
|
static unsigned char char_buf[DB_MAX_CHAR_SIZE_PER_ROW];
|
|
static uint8_t next_free_offset;
|
|
|
|
static aql_attribute_t *
|
|
get_attribute(aql_adt_t *adt, char *name)
|
|
{
|
|
int i;
|
|
|
|
for(i = 0; i < AQL_ATTRIBUTE_COUNT(adt); i++) {
|
|
if(strcmp(adt->attributes[i].name, name) == 0) {
|
|
return &adt->attributes[i];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static unsigned char *
|
|
save_char(unsigned char *ptr, size_t length)
|
|
{
|
|
unsigned char *start_ptr;
|
|
|
|
if(length + next_free_offset > DB_MAX_CHAR_SIZE_PER_ROW) {
|
|
return NULL;
|
|
}
|
|
|
|
start_ptr = char_buf + next_free_offset;
|
|
memcpy(start_ptr, ptr, length);
|
|
next_free_offset += length;
|
|
|
|
return start_ptr;
|
|
}
|
|
|
|
void
|
|
aql_clear(aql_adt_t *adt)
|
|
{
|
|
char_buf[0] = 0;
|
|
next_free_offset = 0;
|
|
|
|
adt->optype = AQL_TYPE_NONE;
|
|
adt->relation_count = 0;
|
|
adt->attribute_count = 0;
|
|
adt->value_count = 0;
|
|
adt->flags = 0;
|
|
memset(adt->aggregators, 0, sizeof(adt->aggregators));
|
|
}
|
|
|
|
db_result_t
|
|
aql_add_attribute(aql_adt_t *adt, char *name, domain_t domain,
|
|
unsigned element_size, int processed_only)
|
|
{
|
|
aql_attribute_t *attr;
|
|
|
|
if(adt->attribute_count == AQL_ATTRIBUTE_LIMIT) {
|
|
return DB_LIMIT_ERROR;
|
|
}
|
|
|
|
if(processed_only && get_attribute(adt, name)) {
|
|
/* No need to have multiple instances of attributes that are only
|
|
used for processing in the PLE. */
|
|
return DB_OK;
|
|
}
|
|
|
|
attr = &adt->attributes[adt->attribute_count++];
|
|
|
|
if(strlen(name) + 1 > sizeof(attr->name)) {
|
|
return DB_LIMIT_ERROR;
|
|
}
|
|
|
|
strcpy(attr->name, name);
|
|
attr->domain = domain;
|
|
attr->element_size = element_size;
|
|
attr->flags = processed_only ? ATTRIBUTE_FLAG_NO_STORE : 0;
|
|
|
|
return DB_OK;
|
|
}
|
|
|
|
db_result_t
|
|
aql_add_value(aql_adt_t *adt, domain_t domain, void *value_ptr)
|
|
{
|
|
attribute_value_t *value;
|
|
|
|
if(adt->value_count == AQL_ATTRIBUTE_LIMIT) {
|
|
return DB_LIMIT_ERROR;
|
|
}
|
|
|
|
value = &adt->values[adt->value_count++];
|
|
value->domain = domain;
|
|
|
|
switch(domain) {
|
|
case DOMAIN_INT:
|
|
VALUE_LONG(value) = *(long *)value_ptr;
|
|
break;
|
|
case DOMAIN_STRING:
|
|
VALUE_STRING(value) = save_char(value_ptr, strlen(value_ptr) + 1);
|
|
if(VALUE_STRING(value) != NULL) {
|
|
break;
|
|
}
|
|
default:
|
|
return DB_TYPE_ERROR;
|
|
}
|
|
|
|
return DB_OK;
|
|
}
|