1 files changed, 114 insertions, 0 deletions
diff --git a/src/encoder.cpp b/src/encoder.cpp
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+++ b/src/encoder.cpp
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+/***************************************************************************
+ *
+ * Copyright (C) 2006 Elad Lahav ([email protected])
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ***************************************************************************/
+
+#include "qstring.h"
+#include "encoder.h"
+
+#define CHAR_TO_HEX(c)		((c) < 0xA ? '0' + (c) : ('A' - 0xA) + (c))
+#define HEX_TO_CHAR(h)		((h) > 'A' ? (h) - ('A' - 0xA) : (h) - '0')
+
+/**
+ * Class constructor.
+ */
+Encoder::Encoder() : m_pBuf(NULL), m_nBufLen(0)
+{
+}
+	
+/**
+ * Class destructor.
+ */
+Encoder::~Encoder() { 
+	if (m_pBuf) 
+		delete[] m_pBuf; 
+}
+	
+/**
+ * Encodes a string.
+ * @param	str	The string to encode
+ * @return	The hex-encoded ASCII string
+ */
+const char* Encoder::encode(const QString& str)
+{
+	const char* szStr;
+	int nLen, i, j;
+		
+	szStr = str.latin1();
+	nLen = str.length();
+		
+	// Ensure the buffer is big enough to contain the result
+	resize((nLen * 2) + 1);
+		
+	// Encode the string
+	for (i = 0, j = 0; i < nLen; i++, j += 2) {
+		m_pBuf[j] = CHAR_TO_HEX(szStr[i] >> 4);
+		m_pBuf[j + 1] = CHAR_TO_HEX(szStr[i] & 0x0f);
+	}
+		
+	m_pBuf[j] = 0;
+	return m_pBuf;
+}
+	
+/**
+ * Decodes a string.
+ * @param	str	The string to decode
+ * @return	The decoded string.
+ */
+const char* Encoder::decode(const QString& str)
+{
+	const char* szStr;
+	int nLen, i, j;
+		
+	szStr = str.latin1();
+	nLen = str.length();
+		
+	// Ensure the buffer is big enough to contain the result
+	nLen /= 2;
+	resize(nLen + 1);
+	
+	// Decode the string
+	for (i = 0, j = 0; i < nLen; i++, j += 2) {
+		m_pBuf[i] = HEX_TO_CHAR(szStr[j]) << 4;
+		m_pBuf[i] |= HEX_TO_CHAR(szStr[j + 1]);
+	}
+		
+	m_pBuf[i] = 0;
+	return m_pBuf;
+}
+	
+/**
+ * Sets a new size to the buffer.
+ * @param	nNewLen	The new size of the buffer
+ */
+void Encoder::resize(int nNewLen)
+{
+	if (m_nBufLen < nNewLen) {
+		if (m_pBuf)
+			delete[] m_pBuf;
+				
+		m_pBuf = new char[nNewLen];
+	}
+}