Added source of Freescale's 'elftosb' tool

[karo-tx-uboot.git] / tools / elftosb / common / HexValues.cpp

diff --git a/tools/elftosb/common/HexValues.cpp b/tools/elftosb/common/HexValues.cpp
new file mode 100644 (file)
index 0000000..5eb2e39
--- /dev/null
+++ b/tools/elftosb/common/HexValues.cpp
@@ -0,0 +1,34 @@
+/*
+ * File:       HexValues.cpp
+ *
+ * Copyright (c) Freescale Semiconductor, Inc. All rights reserved.
+ * See included license file for license details.
+ */
+
+#include "HexValues.h"
+
+bool isHexDigit(char c)
+{
+       return isdigit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
+}
+
+//! \return The integer equivalent to \a c.
+//! \retval -1 The character \a c is not a hex character.
+uint8_t hexCharToInt(char c)
+{
+       if (c >= '0' && c <= '9')
+               return c - '0';
+       else if (c >= 'a' && c <= 'f')
+               return c - 'a' + 10;
+       else if (c >= 'A' && c <= 'F')
+               return c - 'A' + 10;
+       else
+               return static_cast<uint8_t>(-1);
+}
+
+//! \param encodedByte Must point to at least two ASCII hex characters.
+//!
+uint8_t hexByteToInt(const char * encodedByte)
+{
+       return (hexCharToInt(encodedByte[0]) << 4) | hexCharToInt(encodedByte[1]);
+}