Moved bacdcode.c and bacreal.c back to src, and removed the separate bacdcode directory. Since gcc linker can remove unused functions, this was wasted effort. Added bacreal unit test.

2007-10-18 12:13:46 +00:00
parent 6444af91ce
commit a4d9a2eb69
10 changed files with 12 additions and 91 deletions
@@ -0,0 +1,143 @@
+/*####COPYRIGHTBEGIN####
+ -------------------------------------------
+ Copyright (C) 2004 Steve Karg
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2
+ of the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to:
+ The Free Software Foundation, Inc.
+ 59 Temple Place - Suite 330
+ Boston, MA  02111-1307, USA.
+
+ As a special exception, if other files instantiate templates or
+ use macros or inline functions from this file, or you compile
+ this file and link it with other works to produce a work based
+ on this file, this file does not by itself cause the resulting
+ work to be covered by the GNU General Public License. However
+ the source code for this file must still be made available in
+ accordance with section (3) of the GNU General Public License.
+
+ This exception does not invalidate any other reasons why a work
+ based on this file might be covered by the GNU General Public
+ License.
+ -------------------------------------------
+####COPYRIGHTEND####*/
+
+#include <string.h>
+
+#include "bacdef.h"
+#include "bacdcode.h"
+#include "bacenum.h"
+#include "bits.h"
+#include "bacstr.h"
+#include "bacint.h"
+
+/* NOTE: byte order plays a role in decoding multibyte values */
+/* http://www.unixpapa.com/incnote/byteorder.html */
+#ifndef BIG_ENDIAN
+  #error Define BIG_ENDIAN=0 or BIG_ENDIAN=1 for BACnet Stack in compiler settings
+#endif
+
+/* from clause 20.2.6 Encoding of a Real Number Value */
+/* returns the number of apdu bytes consumed */
+int decode_real(uint8_t * apdu, float *real_value)
+{
+    union {
+        uint8_t byte[4];
+        float real_value;
+    } my_data;
+
+    /* NOTE: assumes the compiler stores float as IEEE-754 float */
+#if BIG_ENDIAN
+    my_data.byte[0] = apdu[0];
+    my_data.byte[1] = apdu[1];
+    my_data.byte[2] = apdu[2];
+    my_data.byte[3] = apdu[3];
+#else
+    my_data.byte[0] = apdu[3];
+    my_data.byte[1] = apdu[2];
+    my_data.byte[2] = apdu[1];
+    my_data.byte[3] = apdu[0];
+#endif
+
+    *real_value = my_data.real_value;
+
+    return 4;
+}
+
+/* from clause 20.2.6 Encoding of a Real Number Value */
+/* returns the number of apdu bytes consumed */
+int encode_bacnet_real(float value, uint8_t * apdu)
+{
+    union {
+        uint8_t byte[4];
+        float real_value;
+    } my_data;
+
+    /* NOTE: assumes the compiler stores float as IEEE-754 float */
+    my_data.real_value = value;
+#if BIG_ENDIAN
+    apdu[0] = my_data.byte[0];
+    apdu[1] = my_data.byte[1];
+    apdu[2] = my_data.byte[2];
+    apdu[3] = my_data.byte[3];
+#else
+    apdu[0] = my_data.byte[3];
+    apdu[1] = my_data.byte[2];
+    apdu[2] = my_data.byte[1];
+    apdu[3] = my_data.byte[0];
+#endif
+
+    return 4;
+}
+
+/* end of decoding_encoding.c */
+#ifdef TEST
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include "ctest.h"
+
+void testBACreal(Test * pTest)
+{
+    float real_value = 3.14159F, test_real_value = 0.0;
+    uint8_t apdu[MAX_APDU] = { 0 };
+    int len = 0, test_len = 0;
+    
+    len = encode_bacnet_real(real_value, &apdu[0]);
+    ct_test(pTest, len == 4);
+    test_len = decode_real(&apdu[0], &test_real_value);
+    ct_test(pTest, test_len == len);
+}
+
+#ifdef TEST_BACNET_REAL
+int main(void)
+{
+    Test *pTest;
+    bool rc;
+
+    pTest = ct_create("BACreal", NULL);
+    /* individual tests */
+    rc = ct_addTestFunction(pTest, testBACreal);
+    assert(rc);
+
+    /* configure output */
+    ct_setStream(pTest, stdout);
+    ct_run(pTest);
+    (void) ct_report(pTest);
+    ct_destroy(pTest);
+
+    return 0;
+}
+#endif                          /* TEST_BACNET_REAL */
+#endif                          /* TEST */
+