mirror of
https://github.com/golang/go
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131 lines
2.9 KiB
Go
131 lines
2.9 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gmp
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import "os"
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type Int struct {
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hidden *byte
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}
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func addInt(z, x, y *Int) *Int
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func stringInt(z *Int) string
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func divInt(z, x, y *Int) *Int
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func mulInt(z, x, y *Int) *Int
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func subInt(z, x, y *Int) *Int
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func modInt(z, x, y *Int) *Int
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func rshInt(z, x *Int, s uint) *Int
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func lshInt(z, x *Int, s uint) *Int
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func expInt(z, x, y, m *Int) *Int
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func lenInt(z *Int) int
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func bytesInt(z *Int) []byte
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func setInt(z *Int, x *Int) *Int
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func setBytesInt(z *Int, b []byte) *Int
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func setStringInt(z *Int, s string, b int) int
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func setInt64Int(z *Int, x int64) *Int
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func int64Int(z *Int) int64
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// NewInt returns a new Int initialized to x.
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func NewInt(x int64) *Int
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// z = x + y
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func (z *Int) Add(x, y *Int) *Int {
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return addInt(z, x, y)
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}
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// z = x - y
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func (z *Int) Sub(x, y *Int) *Int {
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return subInt(z, x, y)
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}
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// z = x * y
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func (z *Int) Mul(x, y *Int) *Int {
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return mulInt(z, x, y)
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}
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// z = x
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func (z *Int) SetInt64(x int64) *Int {
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return setInt64Int(z, x);
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}
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// z = x / y
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func (z *Int) Div(x, y *Int) *Int {
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return divInt(z, x, y)
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}
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// z = x % y
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func (z *Int) Mod(x, y *Int) *Int {
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return modInt(z, x, y)
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}
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// z = x^y if m == nil, x^y % m otherwise
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func (z *Int) Exp(x, y, m *Int) *Int {
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return expInt(z, x, y, m);
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}
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// z = x << s
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func (z *Int) Lsh(x *Int, s uint) *Int {
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return lshInt(z, x, s);
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}
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// z = x >> s
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func (z *Int) Rsh(x *Int, s uint) *Int {
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return rshInt(z, x, s);
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}
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// z = x
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func (z *Int) Set(x *Int) *Int {
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return setInt(z, x);
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}
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// Len returns length of z in bits.
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func (z *Int) Len() int {
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return lenInt(z);
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}
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func (z *Int) String() string {
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return stringInt(z)
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}
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func (z *Int) Int64() int64 {
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return int64Int(z)
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}
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// TODO: better name? Maybe return []byte instead?
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// Bytes writes a big-endian representation of z into b.
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// If b is not large enough to contain all of z, the lowest
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// bits are stored.
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func (z *Int) Bytes() []byte {
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return bytesInt(z);
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}
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// SetBytes sets z to the integer represented by the bytes of b
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// interpreted as a big-endian integer.
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func (z *Int) SetBytes(b []byte) *Int {
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return setBytesInt(z, b);
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}
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// SetString parses the string s in base b (8, 10, 16) and sets z to the result.
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// It returns an error if the string cannot be parsed or the base is invalid.
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func (z *Int) SetString(s string, b int) os.Error {
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if b <= 0 || b > 36 || setStringInt(z, s, b) < 0 {
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return os.EINVAL;
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}
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return nil;
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}
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// GcdInt sets d to the greatest common divisor of a and b
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// and sets x and y such that d = a*x + b*y.
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// The inputs a and b must be positive.
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// Pass x == nil and y == nil if only d is needed.
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// If a <= 0 or b <= 0, GcdInt sets d, x, and y to zero.
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func GcdInt(d, x, y, a, b *Int)
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// CmpInt compares x and y. The result is -1, 0, +1.
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func CmpInt(x, y *Int) int
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// DivModInt sets q = x/y, r = x%y.
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func DivModInt(q, r, x, y *Int)
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