#include <gmp_wrap.h>

Public Member Functions
size_t	bytes () const
void	encode (byte[], size_t) const
	GMP_MPZ (const BigInt &=0)
	GMP_MPZ (const byte[], size_t)
	GMP_MPZ (const GMP_MPZ &)
GMP_MPZ &	operator= (const GMP_MPZ &)
BigInt	to_bigint () const
SecureVector< byte >	to_bytes () const
	~GMP_MPZ ()

Public Attributes
mpz_t	value

Detailed Description

Lightweight GMP mpz_t wrapper. For internal use only.

Definition at line 19 of file gmp_wrap.h.

Constructor & Destructor Documentation

◆ GMP_MPZ() [1/3]

Botan::GMP_MPZ::GMP_MPZ ( const GMP_MPZ & other )

Definition at line 44 of file gmp_wrap.cpp.

   {
   mpz_init_set(value, other.value);
   }

References GMP_MPZ(), and value.

Referenced by GMP_MPZ(), and operator=().

◆ GMP_MPZ() [2/3]

Botan::GMP_MPZ::GMP_MPZ ( const BigInt & in = 0 )

Definition at line 25 of file gmp_wrap.cpp.

   {
   mpz_init(value);
   if(in != 0)
      mpz_import(value, in.sig_words(), -1, sizeof(word), 0, 0, in.data());
   }

References Botan::BigInt::data(), Botan::BigInt::sig_words(), and value.

◆ GMP_MPZ() [3/3]

Botan::GMP_MPZ::GMP_MPZ	(	const byte	in[],
		size_t	length )

Definition at line 35 of file gmp_wrap.cpp.

   {
   mpz_init(value);
   mpz_import(value, length, 1, 1, 0, 0, in);
   }

References value.

◆ ~GMP_MPZ()

Botan::GMP_MPZ::~GMP_MPZ ( )

Definition at line 52 of file gmp_wrap.cpp.

   {
   mpz_clear(value);
   }

References value.

Member Function Documentation

◆ bytes()

size_t Botan::GMP_MPZ::bytes ( ) const

Definition at line 78 of file gmp_wrap.cpp.

   {
   return ((mpz_sizeinbase(value, 2) + 7) / 8);
   }

References value.

Referenced by encode(), and to_bigint().

◆ encode()

void Botan::GMP_MPZ::encode	(	byte	out[],
		size_t	length ) const

Definition at line 69 of file gmp_wrap.cpp.

   {
   size_t dummy = 0;
   mpz_export(out + (length - bytes()), &dummy, 1, 1, 0, 0, value);
   }

References bytes(), and value.

◆ operator=()

GMP_MPZ & Botan::GMP_MPZ::operator= ( const GMP_MPZ & other )

Definition at line 60 of file gmp_wrap.cpp.

   {
   mpz_set(value, other.value);
   return (*this);
   }

References GMP_MPZ(), and value.

◆ to_bigint()

BigInt Botan::GMP_MPZ::to_bigint ( ) const

Definition at line 86 of file gmp_wrap.cpp.

   {
   BigInt out(BigInt::Positive, (bytes() + sizeof(word) - 1) / sizeof(word));
   size_t dummy = 0;
   mpz_export(out.get_reg(), &dummy, -1, sizeof(word), 0, 0, value);
 
   if(mpz_sgn(value) < 0)
      out.flip_sign();
 
   return out;
   }