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