added: convert (functions for converting) currently only int(long) -> string

added: textstream (an efficient memory stream for creating strings -- it's using MemBuffer)



git-svn-id: svn://ttmath.org/publicrep/pikotools/trunk@425 e52654a7-88a9-db11-a3e9-0013d4bc506e

convert/convert.h

@@ -0,0 +1,45 @@
+/*
+ * This file is a part of PikoTools
+ * and is distributed under the (new) BSD licence.
+ * Author: Tomasz Sowa <t.sowa@ttmath.org>
+ */
+
+/* 
+ * Copyright (c) 2012, 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 headerfile_picotools_membuffer_convert_convert
+#define headerfile_picotools_membuffer_convert_convert
+
+
+#include "inttostr.h"
+
+
+#endif

convert/inttostr.h

@@ -0,0 +1,156 @@
+/*
+ * This file is a part of PikoTools
+ * and is distributed under the (new) BSD licence.
+ * Author: Tomasz Sowa <t.sowa@ttmath.org>
+ */
+
+/* 
+ * Copyright (c) 2012, 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 headerfile_picotools_membuffer_convert_inttostr
+#define headerfile_picotools_membuffer_convert_inttostr
+
+
+
+
+namespace PT
+{
+
+
+// if the buffer is too small it will be terminated at the beginning (empty string)
+// and the function returns false
+template<class CharType>
+bool Toa(unsigned long value, CharType * buffer, size_t buf_len, int base = 10, size_t * len_out = 0)
+{
+size_t i1, i2;
+long rest;
+
+	if( len_out )
+		*len_out = 0;
+
+	if( buf_len == 0 )
+		return false;
+
+	i1 = i2 = 0;
+
+	if( base < 2 )  base = 2;
+	if( base > 16 )	base = 16;
+
+	do
+	{
+		rest  = value % base;
+		value = value / base;
+		buffer[i2++] = (rest < 10) ? char(rest) + '0' : char(rest) - 10 + 'A';
+	}
+	while(value != 0 && i2 < buf_len);
+
+	if( i2 >= buf_len )
+	{
+		buffer[0] = 0; // ops, the buffer was too small
+		return false;
+	}
+
+	if( len_out )
+		*len_out = i2 - i1;
+
+	buffer[i2--] = 0;
+
+	for( ; i1 < i2 ; ++i1, --i2)
+	{
+		CharType temp = buffer[i1];
+		buffer[i1] = buffer[i2];
+		buffer[i2] = temp;
+	}
+
+return true;
+}
+
+
+
+
+
+
+// if the buffer is too small it will be terminated at the beginning (empty string)
+// and the function returns false
+template<class CharType>
+bool Toa(long value, CharType * buffer, size_t buf_len, int base = 10, size_t * len_out = 0)
+{
+	if( len_out )
+		*len_out = 0;
+
+	if( buf_len == 0 )
+		return false;
+
+	CharType * buf = buffer;
+	bool is_sign = false;
+
+	if( value < 0 )
+	{
+		buffer[0] = '-';
+		buf      += 1;
+		buf_len  -= 1;
+		value     = -value;
+		is_sign   = true;
+	}
+
+	bool res = Toa(static_cast<unsigned long>(value), buf, buf_len, base, len_out);
+
+	if( res )
+	{
+		if( len_out && is_sign )
+			*len_out += 1;
+	}
+	else
+	{
+		buffer[0] = 0;
+		// len_out is set to zero by Toa()
+	}
+
+return res;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+}
+
+
+#endif