CEF changes

3rd_party/ttmath-0.9.3/ttmath/ttmathmisc.h

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+/*
+ * This file is a part of TTMath Bignum Library
+ * and is distributed under the (new) BSD licence.
+ * Author: Tomasz Sowa <t.sowa@ttmath.org>
+ */
+
+/* 
+ * Copyright (c) 2006-2010, Tomasz Sowa
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *    
+ *  * 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.
+ *    
+ *  * Neither the name Tomasz Sowa nor the names of contributors to this
+ *    project may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
+ */
+
+#ifndef headerfilettmathmisc
+#define headerfilettmathmisc
+
+
+/*!
+	\file ttmathmisc.h
+    \brief some helpful functions
+*/
+
+
+#include <string>
+
+
+namespace ttmath
+{
+
+/*!
+	some helpful functions
+*/
+class Misc
+{
+public:
+
+
+/*
+ *
+ *	AssignString(result, str)
+ *	result = str
+ *
+ */
+
+/*!
+	result = str
+*/
+static void AssignString(std::string & result, const char * str)
+{
+	result = str;
+}
+
+
+#ifndef TTMATH_DONT_USE_WCHAR
+
+/*!
+	result = str
+*/
+static void AssignString(std::wstring & result, const char * str)
+{
+	result.clear();
+
+	for( ; *str ; ++str )
+		result += *str;
+}
+
+
+/*!
+	result = str
+*/
+static void AssignString(std::wstring & result, const std::string & str)
+{
+	return AssignString(result, str.c_str());
+}
+
+
+/*!
+	result = str
+*/
+static void AssignString(std::string & result, const wchar_t * str)
+{
+	result.clear();
+
+	for( ; *str ; ++str )
+		result += static_cast<char>(*str);
+}
+
+
+/*!
+	result = str
+*/
+static void AssignString(std::string & result, const std::wstring & str)
+{
+	return AssignString(result, str.c_str());
+}
+
+#endif
+
+
+/*
+ *
+ *	AddString(result, str)
+ *	result += str
+ *
+ */
+
+
+/*!
+	result += str
+*/
+static void AddString(std::string & result, const char * str)
+{
+	result += str;
+}
+
+
+#ifndef TTMATH_DONT_USE_WCHAR
+
+/*!
+	result += str
+*/
+static void AddString(std::wstring & result, const char * str)
+{
+	for( ; *str ; ++str )
+		result += *str;
+}
+
+#endif
+
+
+/*
+	this method omits any white characters from the string
+	char_type is char or wchar_t
+*/
+template<class char_type>
+static void SkipWhiteCharacters(const char_type * & c)
+{
+	// 13 is at the end in a DOS text file (\r\n)
+	while( (*c==' ' ) || (*c=='\t') || (*c==13 ) || (*c=='\n') )
+		++c;
+}
+
+
+
+
+/*!
+	this static method converts one character into its value
+
+	for example:
+		1 -> 1
+		8 -> 8
+		A -> 10
+		f -> 15
+
+	this method don't check whether c is correct or not
+*/
+static uint CharToDigit(uint c)
+{
+	if(c>='0' && c<='9')
+		return c-'0';
+
+	if(c>='a' && c<='z')
+		return c-'a'+10;
+
+return c-'A'+10;
+}
+
+
+/*!
+	this method changes a character 'c' into its value
+	(if there can't be a correct value it returns -1)
+
+	for example:
+	c=2, base=10 -> function returns 2
+	c=A, base=10 -> function returns -1
+	c=A, base=16 -> function returns 10
+*/
+static sint CharToDigit(uint c, uint base)
+{
+	if( c>='0' && c<='9' )
+		c=c-'0';
+	else
+	if( c>='a' && c<='z' )
+		c=c-'a'+10;
+	else
+	if( c>='A' && c<='Z' )
+		c=c-'A'+10;
+	else
+		return -1;
+
+
+	if( c >= base )
+		return -1;
+
+
+return sint(c);
+}
+
+
+
+/*!
+	this method converts a digit into a char
+	digit should be from <0,F>
+	(we don't have to get a base)
+	
+	for example:
+		1  -> 1
+		8  -> 8
+		10 -> A
+		15 -> F
+*/
+static uint DigitToChar(uint digit)
+{
+	if( digit < 10 )
+		return digit + '0';
+
+return digit - 10 + 'A';
+}
+
+
+}; // struct Misc
+
+}
+
+
+#endif