gmp_lib.mpn_divrem_1 Method

GMP Native Interface for .NET

previous page next page
gmp_libmpn_divrem_1 Method
Divide {s2p, s2n} by s3limb, and write the quotient at r1p.

Namespace:  Math.Gmp.Native
Assembly:  Math.Gmp.Native (in Math.Gmp.Native.dll) Version: 1.0.0.0 (1.0.0.0)
Syntax
Copy
public static mp_limb_t mpn_divrem_1(
	mp_ptr r1p,
	mp_size_t qxn,
	mp_ptr s2p,
	mp_size_t s2n,
	mp_limb_t s3limb
)
Public Shared Function mpn_divrem_1 ( 
	r1p As mp_ptr,
	qxn As mp_size_t,
	s2p As mp_ptr,
	s2n As mp_size_t,
	s3limb As mp_limb_t
) As mp_limb_t
public:
static mp_limb_t mpn_divrem_1(
	mp_ptr^ r1p, 
	mp_size_t qxn, 
	mp_ptr^ s2p, 
	mp_size_t s2n, 
	mp_limb_t s3limb
)
static member mpn_divrem_1 : 
        r1p : mp_ptr * 
        qxn : mp_size_t * 
        s2p : mp_ptr * 
        s2n : mp_size_t * 
        s3limb : mp_limb_t -> mp_limb_t

Parameters

r1p
Type: Math.Gmp.Nativemp_ptr
qxn
Type: Math.Gmp.Nativemp_size_t
s2p
Type: Math.Gmp.Nativemp_ptr
s2n
Type: Math.Gmp.Nativemp_size_t
s3limb
Type: Math.Gmp.Nativemp_limb_t

Return Value

Type: mp_limb_t
Return the remainder.
Remarks

The integer quotient is written to {r1p + qxn, s2n} and in addition qxn fraction limbs are developed and written to {r1p, qxn}. Either or both s2n and qxn can be zero. For most usages, qxn will be zero.

mpn_divmod_1 exists for upward source compatibility and is simply a macro calling mpn_divrem_1 with a qxn of 0.

The areas at r1p and s2p have to be identical or completely separate, not partially overlapping.

Examples
Copy
// Create multi-precision operands, and expected result.
mp_ptr s2p = new mp_ptr(new uint[] { 0xffffffff, 0x0000ffff });
mp_ptr r1p = new mp_ptr(new uint[2]);
mp_ptr result = new mp_ptr(new uint[] { 0x435e50d7, 0x00000d79 });

// Set r1p = s2p / 19.
mp_limb_t remainder = gmp_lib.mpn_divrem_1(r1p, 0, s2p, s2p.Size, 0x13);

// Assert result of operation.
Assert.IsTrue(remainder == 10);
Assert.IsTrue(r1p.SequenceEqual(result));

// Release unmanaged memory.
gmp_lib.free(r1p, s2p, result);
' Create multi-precision operands, and expected result.
Dim s2p As New mp_ptr(New UInteger() { &HffffffffUI, &Hffff})
Dim r1p As New mp_ptr(New UInteger(1) { })
Dim result As New mp_ptr(New UInteger() { &H435e50d7, &Hd79})

' Set r1p = s2p / 19.
Dim remainder As mp_limb_t = gmp_lib.mpn_divrem_1(r1p, 0, s2p, s2p.Size, &H13)

' Assert result of operation.
Assert.IsTrue(remainder = 10)
Assert.IsTrue(r1p.SequenceEqual(result))

' Release unmanaged memory.
gmp_lib.free(r1p, s2p, result)

No code example is currently available or this language may not be supported.

No code example is currently available or this language may not be supported.

See Also
previous page start next page