diff options
author | Keith Isdale <keith.isdale@nokia.com> | 2010-07-26 14:56:53 +1000 |
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committer | Keith Isdale <keith.isdale@nokia.com> | 2010-07-26 14:56:53 +1000 |
commit | 9f034793bcfc51c2b7c1dd14db806f7258f9a9eb (patch) | |
tree | 63bd0f50ce5b77828ad8205eafd7b9412810499e /botan/src/math/bigint/big_io.cpp | |
parent | 619d92cfef29e653bfdf852e83888e50cfc4348f (diff) | |
parent | 65271649dbc90f3af1184ad1b23bdb64c0c07d07 (diff) |
Merge branch 'master' of git://git-nokia.trolltech.com.au/qtsoftware/research/qtuitest
Diffstat (limited to 'botan/src/math/bigint/big_io.cpp')
-rw-r--r-- | botan/src/math/bigint/big_io.cpp | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/botan/src/math/bigint/big_io.cpp b/botan/src/math/bigint/big_io.cpp new file mode 100644 index 0000000..b50fcce --- /dev/null +++ b/botan/src/math/bigint/big_io.cpp @@ -0,0 +1,55 @@ +/* +* BigInt Input/Output +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/bigint.h> +#include <iostream> + +namespace Botan { + +/* +* Write the BigInt into a stream +*/ +std::ostream& operator<<(std::ostream& stream, const BigInt& n) + { + BigInt::Base base = BigInt::Decimal; + if(stream.flags() & std::ios::hex) + base = BigInt::Hexadecimal; + else if(stream.flags() & std::ios::oct) + base = BigInt::Octal; + + if(n == 0) + stream.write("0", 1); + else + { + if(n < 0) + stream.write("-", 1); + SecureVector<byte> buffer = BigInt::encode(n, base); + u32bit skip = 0; + while(buffer[skip] == '0' && skip < buffer.size()) + ++skip; + stream.write(reinterpret_cast<const char*>(buffer.begin()) + skip, + buffer.size() - skip); + } + if(!stream.good()) + throw Stream_IO_Error("BigInt output operator has failed"); + return stream; + } + +/* +* Read the BigInt from a stream +*/ +std::istream& operator>>(std::istream& stream, BigInt& n) + { + std::string str; + std::getline(stream, str); + if(stream.bad() || (stream.fail() && !stream.eof())) + throw Stream_IO_Error("BigInt input operator has failed"); + n = BigInt(str); + return stream; + } + +} |