skarg
656 lines
15 KiB
C
656 lines
15 KiB
C
/*####COPYRIGHTBEGIN####
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-------------------------------------------
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Copyright (C) 2004 Steve Karg
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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The Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA.
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As a special exception, if other files instantiate templates or
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use macros or inline functions from this file, or you compile
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this file and link it with other works to produce a work based
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on this file, this file does not by itself cause the resulting
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work to be covered by the GNU General Public License. However
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the source code for this file must still be made available in
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accordance with section (3) of the GNU General Public License.
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This exception does not invalidate any other reasons why a work
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based on this file might be covered by the GNU General Public
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License.
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-------------------------------------------
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####COPYRIGHTEND####*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <string.h> /* for strlen */
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#include "bacstr.h"
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#include "bits.h"
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void bitstring_init(BACNET_BIT_STRING *bit_string)
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{
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int i;
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bit_string->bits_used = 0;
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for (i = 0; i < MAX_BITSTRING_BYTES; i++)
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{
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bit_string->value[i] = 0;
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}
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}
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void bitstring_set_bit(BACNET_BIT_STRING *bit_string, uint8_t bit, bool value)
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{
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uint8_t byte_number = bit/8;
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uint8_t bit_mask = 1;
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if (byte_number < MAX_BITSTRING_BYTES)
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{
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// set max bits used
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if (bit_string->bits_used < (bit + 1))
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bit_string->bits_used = bit + 1;
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bit_mask = bit_mask << (bit - (byte_number * 8));
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if (value)
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bit_string->value[byte_number] |= bit_mask;
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else
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bit_string->value[byte_number] &= (~(bit_mask));
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}
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}
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bool bitstring_bit(BACNET_BIT_STRING *bit_string, uint8_t bit)
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{
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bool value = false;
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uint8_t byte_number = bit/8;
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uint8_t bit_mask = 1;
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if (bit < (MAX_BITSTRING_BYTES * 8))
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{
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bit_mask = bit_mask << (bit - (byte_number * 8));
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if (bit_string->value[byte_number] & bit_mask)
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value = true;
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}
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return value;
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}
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uint8_t bitstring_bits_used(BACNET_BIT_STRING *bit_string)
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{
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return bit_string->bits_used;
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}
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// returns the number of bytes that a bit string is using
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int bitstring_bytes_used(BACNET_BIT_STRING *bit_string)
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{
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int len = 0; // return value
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uint8_t used_bytes = 0;
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uint8_t last_bit = 0;
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if (bit_string->bits_used)
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{
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last_bit = bit_string->bits_used - 1;
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used_bytes = last_bit / 8;
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// add one for the first byte
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used_bytes++;
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len = used_bytes;
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}
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return len;
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}
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uint8_t bitstring_octet(BACNET_BIT_STRING *bit_string, uint8_t index)
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{
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uint8_t octet = 0;
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if (bit_string)
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{
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if (index < MAX_BITSTRING_BYTES)
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{
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octet = bit_string->value[index];
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}
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}
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return octet;
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}
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bool bitstring_set_octet(
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BACNET_BIT_STRING *bit_string,
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uint8_t index,
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uint8_t octet)
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{
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bool status = false;
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if (bit_string)
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{
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if (index < MAX_BITSTRING_BYTES)
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{
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bit_string->value[index] = octet;
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status = true;
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}
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}
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return status;
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}
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bool bitstring_set_bits_used(
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BACNET_BIT_STRING *bit_string,
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uint8_t bytes_used,
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uint8_t unused_bits)
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{
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bool status = false;
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if (bit_string)
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{
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/* FIXME: check that bytes_used is at least one? */
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bit_string->bits_used = bytes_used * 8;
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bit_string->bits_used -= unused_bits;
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status = true;
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}
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return status;
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}
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uint8_t bitstring_bits_capacity(BACNET_BIT_STRING *bit_string)
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{
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if (bit_string)
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return (sizeof(bit_string->value) * 8);
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else
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return 0;
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}
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#define CHARACTER_STRING_CAPACITY (MAX_CHARACTER_STRING_BYTES - 1)
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/* returns false if the string exceeds capacity
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initialize by using length=0 */
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bool characterstring_init(
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BACNET_CHARACTER_STRING *char_string,
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uint8_t encoding,
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char *value,
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size_t length)
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{
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bool status = false; /* return value */
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size_t i; /* counter */
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if (char_string)
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{
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char_string->length = 0;
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char_string->encoding = encoding;
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/* save a byte at the end for NULL -
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note: assumes printable characters */
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if (length <= CHARACTER_STRING_CAPACITY)
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{
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if (value)
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{
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for (i = 0; i < MAX_CHARACTER_STRING_BYTES; i++)
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{
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if (i < length)
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{
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char_string->value[char_string->length] = value[i];
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char_string->length++;
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}
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else
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char_string->value[i] = 0;
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}
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}
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else
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{
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for (i = 0; i < MAX_CHARACTER_STRING_BYTES; i++)
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{
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char_string->value[i] = 0;
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}
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}
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status = true;
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}
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}
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return status;
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}
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bool characterstring_init_ansi(
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BACNET_CHARACTER_STRING *char_string,
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char *value)
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{
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return characterstring_init(
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char_string,
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CHARACTER_ANSI_X34,
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value, value?strlen(value):0);
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}
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bool characterstring_copy(
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BACNET_CHARACTER_STRING *dest,
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BACNET_CHARACTER_STRING *src)
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{
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return characterstring_init(dest,
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characterstring_encoding(src),
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characterstring_value(src),
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characterstring_length(src));
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}
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/* returns false if the string exceeds capacity */
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bool characterstring_append(
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BACNET_CHARACTER_STRING *char_string,
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char *value,
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size_t length)
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{
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size_t i; /* counter */
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bool status = false; /* return value */
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if (char_string)
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{
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if ((length + char_string->length) <= CHARACTER_STRING_CAPACITY)
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{
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for (i = 0; i < length; i++)
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{
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char_string->value[char_string->length] = value[i];
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char_string->length++;
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}
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status = true;
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}
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}
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return status;
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}
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/* This function sets a new length without changing the value.
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If length exceeds capacity, no modification happens and
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function returns false. */
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bool characterstring_truncate(
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BACNET_CHARACTER_STRING *char_string,
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size_t length)
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{
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bool status = false; /* return value */
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if (char_string)
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{
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if (length <= CHARACTER_STRING_CAPACITY)
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{
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char_string->length = length;
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status = true;
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}
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}
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return status;
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}
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/* Returns the value. */
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char *characterstring_value(BACNET_CHARACTER_STRING *char_string)
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{
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char *value = NULL;
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if (char_string)
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{
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value = char_string->value;
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}
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return value;
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}
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/* returns the length. */
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size_t characterstring_length(BACNET_CHARACTER_STRING *char_string)
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{
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size_t length = 0;
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if (char_string)
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{
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/* FIXME: validate length is within bounds? */
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length = char_string->length;
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}
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return length;
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}
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size_t characterstring_capacity(BACNET_CHARACTER_STRING *char_string)
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{
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size_t length = 0;
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if (char_string)
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{
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length = CHARACTER_STRING_CAPACITY;
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}
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return length;
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}
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/* returns the encoding. */
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uint8_t characterstring_encoding(BACNET_CHARACTER_STRING *char_string)
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{
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uint8_t encoding = 0;
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if (char_string)
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{
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encoding = char_string->encoding;
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}
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return encoding;
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}
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/* returns false if the string exceeds capacity
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initialize by using length=0 */
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bool octetstring_init(
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BACNET_OCTET_STRING *octet_string,
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uint8_t *value,
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size_t length)
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{
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bool status = false; /* return value */
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size_t i; /* counter */
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if (octet_string)
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{
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octet_string->length = 0;
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if (length <= sizeof(octet_string->value))
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{
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if (value)
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{
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for (i = 0; i < length; i++)
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{
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octet_string->value[octet_string->length] = value[i];
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octet_string->length++;
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}
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}
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else
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{
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for (i = 0; i < sizeof(octet_string->value); i++)
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{
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octet_string->value[i] = 0;
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}
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}
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status = true;
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}
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}
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return status;
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}
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bool octetstring_copy(
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BACNET_OCTET_STRING *dest,
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BACNET_OCTET_STRING *src)
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{
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return octetstring_init(dest,
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octetstring_value(src),
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octetstring_length(src));
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}
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/* returns false if the string exceeds capacity */
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bool octetstring_append(
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BACNET_OCTET_STRING *octet_string,
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uint8_t *value,
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size_t length)
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{
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size_t i; /* counter */
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bool status = false; /* return value */
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if (octet_string)
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{
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if ((length + octet_string->length) <= sizeof(octet_string->value))
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{
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for (i = 0; i < length; i++)
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{
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octet_string->value[octet_string->length] = value[i];
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octet_string->length++;
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}
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status = true;
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}
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}
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return status;
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}
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/* This function sets a new length without changing the value.
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If length exceeds capacity, no modification happens and
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function returns false. */
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bool octetstring_truncate(
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BACNET_OCTET_STRING *octet_string,
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size_t length)
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{
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bool status = false; /* return value */
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if (octet_string)
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{
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if (length <= sizeof(octet_string->value))
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{
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octet_string->length = length;
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status = true;
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}
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}
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return status;
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}
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/* returns the length. Returns the value in parameter. */
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uint8_t *octetstring_value(BACNET_OCTET_STRING *octet_string)
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{
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uint8_t *value = NULL;
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if (octet_string)
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{
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value = octet_string->value;
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}
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return value;
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}
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/* returns the length. */
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size_t octetstring_length(BACNET_OCTET_STRING *octet_string)
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{
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size_t length = 0;
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if (octet_string)
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{
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/* FIXME: validate length is within bounds? */
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length = octet_string->length;
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}
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return length;
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}
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/* returns the length. */
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size_t octetstring_capacity(BACNET_OCTET_STRING *octet_string)
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{
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size_t length = 0;
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if (octet_string)
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{
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/* FIXME: validate length is within bounds? */
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length = sizeof(octet_string->value);
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}
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return length;
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}
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#ifdef TEST
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#include <assert.h>
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#include <string.h>
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#include "ctest.h"
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void testBitString(Test * pTest)
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{
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uint8_t bit = 0;
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BACNET_BIT_STRING bit_string;
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bitstring_init(&bit_string);
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// verify initialization
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ct_test(pTest, bitstring_bits_used(&bit_string) == 0);
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for (bit = 0; bit < (MAX_BITSTRING_BYTES*8); bit++)
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{
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ct_test(pTest, bitstring_bit(&bit_string, bit) == false);
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}
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// test for true
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for (bit = 0; bit < (MAX_BITSTRING_BYTES*8); bit++)
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{
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bitstring_set_bit(&bit_string, bit, true);
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ct_test(pTest, bitstring_bits_used(&bit_string) == (bit + 1));
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ct_test(pTest, bitstring_bit(&bit_string, bit) == true);
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}
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// test for false
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bitstring_init(&bit_string);
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for (bit = 0; bit < (MAX_BITSTRING_BYTES*8); bit++)
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{
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bitstring_set_bit(&bit_string, bit, false);
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ct_test(pTest, bitstring_bits_used(&bit_string) == (bit + 1));
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ct_test(pTest, bitstring_bit(&bit_string, bit) == false);
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}
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}
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void testCharacterString(Test * pTest)
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{
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BACNET_CHARACTER_STRING bacnet_string;
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char *value = "Joshua,Mary,Anna,Christopher";
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char test_value[MAX_APDU] = "Patricia";
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char test_append_value[MAX_APDU] = " and the Kids";
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char test_append_string[MAX_APDU] = "";
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bool status = false;
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size_t length = 0;
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size_t test_length = 0;
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size_t i = 0;
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// verify initialization
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status = characterstring_init(&bacnet_string,CHARACTER_ANSI_X34,NULL,0);
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ct_test(pTest, status == true);
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ct_test(pTest,characterstring_length(&bacnet_string) == 0);
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ct_test(pTest,characterstring_encoding(&bacnet_string) == CHARACTER_ANSI_X34);
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/* bounds check */
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status = characterstring_init(
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&bacnet_string,
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CHARACTER_ANSI_X34,
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NULL,
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characterstring_capacity(&bacnet_string)+1);
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ct_test(pTest, status == false);
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status = characterstring_truncate(
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&bacnet_string,characterstring_capacity(&bacnet_string)+1);
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ct_test(pTest, status == false);
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status = characterstring_truncate(
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&bacnet_string,characterstring_capacity(&bacnet_string));
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ct_test(pTest, status == true);
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test_length = strlen(test_value);
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status = characterstring_init(
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&bacnet_string,
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CHARACTER_ANSI_X34,
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&test_value[0],
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test_length);
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ct_test(pTest, status == true);
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value = characterstring_value(&bacnet_string);
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length = characterstring_length(&bacnet_string);
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ct_test(pTest, length == test_length);
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for (i = 0; i < test_length; i++)
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{
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ct_test(pTest, value[i] == test_value[i]);
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}
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test_length = strlen(test_append_value);
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status = characterstring_append(
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&bacnet_string,
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&test_append_value[0],
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test_length);
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strcat(test_append_string,test_value);
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strcat(test_append_string,test_append_value);
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test_length = strlen(test_append_string);
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ct_test(pTest, status == true);
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length = characterstring_length(&bacnet_string);
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value = characterstring_value(&bacnet_string);
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ct_test(pTest, length == test_length);
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for (i = 0; i < test_length; i++)
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{
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ct_test(pTest, value[i] == test_append_string[i]);
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}
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}
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void testOctetString(Test * pTest)
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{
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BACNET_OCTET_STRING bacnet_string;
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uint8_t *value = NULL;
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uint8_t test_value[MAX_APDU] = "Patricia";
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uint8_t test_append_value[MAX_APDU] = " and the Kids";
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uint8_t test_append_string[MAX_APDU] = "";
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bool status = false;
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size_t length = 0;
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size_t test_length = 0;
|
|
size_t i = 0;
|
|
|
|
// verify initialization
|
|
status = octetstring_init(&bacnet_string,NULL,0);
|
|
ct_test(pTest, status == true);
|
|
ct_test(pTest,octetstring_length(&bacnet_string) == 0);
|
|
value = octetstring_value(&bacnet_string);
|
|
for (i = 0; i < octetstring_capacity(&bacnet_string); i++)
|
|
{
|
|
ct_test(pTest, value[i] == 0);
|
|
}
|
|
/* bounds check */
|
|
status = octetstring_init(&bacnet_string,NULL,
|
|
octetstring_capacity(&bacnet_string)+1);
|
|
ct_test(pTest, status == false);
|
|
status = octetstring_init(&bacnet_string,NULL,
|
|
octetstring_capacity(&bacnet_string));
|
|
ct_test(pTest, status == true);
|
|
status = octetstring_truncate(&bacnet_string,octetstring_capacity(&bacnet_string)+1);
|
|
ct_test(pTest, status == false);
|
|
status = octetstring_truncate(&bacnet_string,octetstring_capacity(&bacnet_string));
|
|
ct_test(pTest, status == true);
|
|
|
|
test_length = strlen((char *)test_value);
|
|
status = octetstring_init(
|
|
&bacnet_string,
|
|
&test_value[0],
|
|
test_length);
|
|
ct_test(pTest, status == true);
|
|
length = octetstring_length(&bacnet_string);
|
|
value = octetstring_value(&bacnet_string);
|
|
ct_test(pTest, length == test_length);
|
|
for (i = 0; i < test_length; i++)
|
|
{
|
|
ct_test(pTest, value[i] == test_value[i]);
|
|
}
|
|
|
|
test_length = strlen((char *)test_append_value);
|
|
status = octetstring_append(
|
|
&bacnet_string,
|
|
&test_append_value[0],
|
|
test_length);
|
|
strcat((char *)test_append_string,(char *)test_value);
|
|
strcat((char *)test_append_string,(char *)test_append_value);
|
|
test_length = strlen((char *)test_append_string);
|
|
ct_test(pTest, status == true);
|
|
length = octetstring_length(&bacnet_string);
|
|
value = octetstring_value(&bacnet_string);
|
|
ct_test(pTest, length == test_length);
|
|
for (i = 0; i < test_length; i++)
|
|
{
|
|
ct_test(pTest, value[i] == test_append_string[i]);
|
|
}
|
|
}
|
|
|
|
#ifdef TEST_BACSTR
|
|
int main(void)
|
|
{
|
|
Test *pTest;
|
|
bool rc;
|
|
|
|
pTest = ct_create("BACnet Strings", NULL);
|
|
/* individual tests */
|
|
rc = ct_addTestFunction(pTest, testBitString);
|
|
assert(rc);
|
|
rc = ct_addTestFunction(pTest, testCharacterString);
|
|
assert(rc);
|
|
rc = ct_addTestFunction(pTest, testOctetString);
|
|
assert(rc);
|
|
// configure output
|
|
ct_setStream(pTest, stdout);
|
|
ct_run(pTest);
|
|
(void) ct_report(pTest);
|
|
ct_destroy(pTest);
|
|
|
|
return 0;
|
|
}
|
|
#endif /* TEST_BACSTR */
|
|
#endif /* TEST */
|