Diff: Utilities/utilities.c

Revision:

0:bacc6e701fb4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Utilities/utilities.c	Mon Mar 29 15:37:08 2021 +0000
@@ -0,0 +1,128 @@
+/*
+ / _____)             _              | |
+( (____  _____ ____ _| |_ _____  ____| |__
+ \____ \| ___ |    (_   _) ___ |/ ___)  _ \
+ _____) ) ____| | | || |_| ____( (___| | | |
+(______/|_____)_|_|_| \__)_____)\____)_| |_|
+    (C)2013 Semtech
+
+  _    _            _____   _______
+ | |  | |          |_   _| |__   __|
+ | |__| | __ ___  __ | |  ___ | |
+ |  __  |/ _` \ \/ / | | / _ \| |
+ | |  | | (_| |>  < _| || (_) | |
+ |_|  |_|\__,_/_/\_\_____\___/|_|
+    (C)2017 HaxIoT
+
+Description: Helper functions implementation
+
+License: Revised BSD License, see LICENSE.TXT file include in the project
+
+Maintainer: Miguel Luis and Gregory Cristian
+            Fahad Mirza (Haxiot)
+*/
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include "tiny_sscanf.h"
+#include "utilities.h"
+
+/*!
+ * Redefinition of rand() and srand() standard C functions.
+ * These functions are redefined in order to get the same behavior across
+ * different compiler toolchains implementations.
+ */
+// Standard random functions redefinition start
+#define RAND_LOCAL_MAX 2147483647L
+
+static uint32_t next = 1;
+
+int32_t rand1( void )
+{
+    return ( ( next = next * 1103515245L + 12345L ) % RAND_LOCAL_MAX );
+}
+
+void srand1( uint32_t seed )
+{
+    next = seed;
+}
+// Standard random functions redefinition end
+
+int32_t randr( int32_t min, int32_t max )
+{
+    return ( int32_t )rand1( ) % ( max - min + 1 ) + min;
+}
+
+void memcpy1( uint8_t *dst, const uint8_t *src, uint16_t size )
+{
+    while( size-- )
+    {
+        *dst++ = *src++;
+    }
+}
+
+void memcpyr( uint8_t *dst, const uint8_t *src, uint16_t size )
+{
+    dst = dst + ( size - 1 );
+    while( size-- )
+    {
+        *dst-- = *src++;
+    }
+}
+
+void memset1( uint8_t *dst, uint8_t value, uint16_t size )
+{
+    while( size-- )
+    {
+        *dst++ = value;
+    }
+}
+
+int8_t Nibble2HexChar( uint8_t a )
+{
+    if( a < 10 )
+    {
+        return '0' + a;
+    }
+    else if( a < 16 )
+    {
+        return 'A' + ( a - 10 );
+    }
+    else
+    {
+        return '?';
+    }
+}
+
+uint8_t stringHexToByteArray(const char *hexString, uint8_t *buffer, uint8_t bufSize)
+{
+    uint8_t count = 0;
+    char hex[3];
+    hex[2] = '\0';
+
+    while( (*hexString != '\0') && (*(hexString + 1) != '\0') )
+    {
+    	// Separate two digits(i.e 1 HexByte) from the hex string
+        hex[0] = *hexString;
+        hex[1] = *(hexString + 1);
+
+        if((tiny_sscanf(hex, "%hhx",&buffer[count]) != 1))
+        {
+            // hex doesn't have valid numbers
+            break;
+        }
+        count++;
+        if (count == (bufSize - 1))
+        {
+          // We are out of space
+          break;
+        }
+        // Advance string hex pointer by two
+        hexString += 2;
+    }
+	
+	buffer[count] = '\0';
+	
+    return count;
+}
+