qca

big_io.cpp

00001 /*
00002 Copyright (C) 1999-2007 The Botan Project. All rights reserved.
00003 
00004 Redistribution and use in source and binary forms, for any use, with or without
00005 modification, is permitted provided that the following conditions are met:
00006 
00007 1. Redistributions of source code must retain the above copyright notice, this
00008 list of conditions, and the following disclaimer.
00009 
00010 2. Redistributions in binary form must reproduce the above copyright notice,
00011 this list of conditions, and the following disclaimer in the documentation
00012 and/or other materials provided with the distribution.
00013 
00014 THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) "AS IS" AND ANY EXPRESS OR IMPLIED
00015 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
00016 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
00017 
00018 IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE FOR ANY DIRECT,
00019 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00020 BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00021 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00022 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
00023 OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
00024 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00025 */
00026 // LICENSEHEADER_END
00027 namespace QCA { // WRAPNS_LINE
00028 /*************************************************
00029 * BigInt Input/Output Source File                *
00030 * (C) 1999-2007 The Botan Project                *
00031 *************************************************/
00032 
00033 } // WRAPNS_LINE
00034 #include <botan/bigint.h>
00035 namespace QCA { // WRAPNS_LINE
00036 } // WRAPNS_LINE
00037 #include <iostream>
00038 namespace QCA { // WRAPNS_LINE
00039 
00040 namespace Botan {
00041 
00042 #ifndef BOTAN_MINIMAL_BIGINT
00043 
00044 /*************************************************
00045 * Write the BigInt into a stream                 *
00046 *************************************************/
00047 std::ostream& operator<<(std::ostream& stream, const BigInt& n)
00048    {
00049    BigInt::Base base = BigInt::Decimal;
00050    if(stream.flags() & std::ios::hex)
00051       base = BigInt::Hexadecimal;
00052    else if(stream.flags() & std::ios::oct)
00053       base = BigInt::Octal;
00054 
00055    if(n == 0)
00056       stream.write("0", 1);
00057    else
00058       {
00059       if(n < 0)
00060          stream.write("-", 1);
00061       SecureVector<byte> buffer = BigInt::encode(n, base);
00062       u32bit skip = 0;
00063       while(buffer[skip] == '0' && skip < buffer.size())
00064          ++skip;
00065       stream.write((const char*)buffer.begin() + skip, buffer.size() - skip);
00066       }
00067    if(!stream.good())
00068       throw Stream_IO_Error("BigInt output operator has failed");
00069    return stream;
00070    }
00071 
00072 /*************************************************
00073 * Read the BigInt from a stream                  *
00074 *************************************************/
00075 std::istream& operator>>(std::istream& stream, BigInt& n)
00076    {
00077    std::string str;
00078    std::getline(stream, str);
00079    if(stream.bad() || (stream.fail() && !stream.eof()))
00080       throw Stream_IO_Error("BigInt input operator has failed");
00081    n = BigInt(str);
00082    return stream;
00083    }
00084 
00085 #endif
00086 
00087 }
00088 } // WRAPNS_LINE
qca

big_io.cpp

qca

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