--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spandsp-0.0.6pre17/tests/crc_tests.c	Fri Jun 25 15:50:58 2010 +0200
@@ -0,0 +1,111 @@
+/*
+ * SpanDSP - a series of DSP components for telephony
+ *
+ * crc_tests.c
+ *
+ * Written by Steve Underwood <steveu@coppice.org>
+ *
+ * Copyright (C) 2003 Steve Underwood
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * $Id: crc_tests.c,v 1.6 2008/05/13 13:17:25 steveu Exp $
+ */
+
+/*! \file */
+
+/*! \page crc_tests_page CRC tests
+\section crc_tests_page_sec_1 What does it do?
+The CRC tests exercise the ITU-16 and ITU-32 CRC module, and verifies
+correct operation.
+*/
+
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "spandsp.h"
+
+int ref_len;
+uint8_t buf[1000];
+
+/* Use a local random generator, so the results are consistent across platforms. We have hard coded
+   correct results for a message sequence generated by this particular PRNG. */
+static int my_rand(void)
+{
+    static int rndnum = 1234567;
+
+    return (rndnum = 1664525U*rndnum + 1013904223U) >> 8;
+}
+/*- End of function --------------------------------------------------------*/
+
+static int cook_up_msg(uint8_t *buf)
+{
+    int i;
+    int len;
+
+    /* Use medium length messages, with some randomised length variation. */
+    /* TODO: this doesn't exercise extremely short or long messages. */
+    len = (my_rand() & 0x3F) + 100;
+    for (i = 0;  i < len;  i++)
+        buf[i] = my_rand();
+    return len;
+}
+/*- End of function --------------------------------------------------------*/
+
+int main(int argc, char *argv[])
+{
+    int i;
+    int len;
+
+    printf("HDLC module tests\n");
+
+    /* TODO: This doesn't check every function in the module */
+    
+    /* Try a few random messages through the CRC logic. */
+    printf("Testing the CRC-16 routines\n");
+    for (i = 0;  i < 100;  i++)
+    {
+        ref_len = cook_up_msg(buf);
+        len = crc_itu16_append(buf, ref_len);
+        if (!crc_itu16_check(buf, len))
+        {
+            printf("CRC-16 failure\n");
+            exit(2);
+        }
+    }
+    printf("Test passed.\n\n");
+    
+    printf("Testing the CRC-32 routines\n");
+    for (i = 0;  i < 100;  i++)
+    {
+        ref_len = cook_up_msg(buf);
+        len = crc_itu32_append(buf, ref_len);
+        if (!crc_itu32_check(buf, len))
+        {
+            printf("CRC-32 failure\n");
+            exit(2);
+        }
+    }
+    printf("Test passed.\n");
+    return  0;
+}
+/*- End of function --------------------------------------------------------*/
+/*- End of file ------------------------------------------------------------*/