3b8efba395
While the original plan was to keep uint256 as a part of the primitives module, there has been interest in using the uint256 code now and the primitives module will not be complete and ready for release for quite some time. Also, after further discussion, the general preference is for a separate module that lives at math/uint256 for this code since the primitives module will ultimately be squarely aimed at Decred-specific things while math/uint256 is more generally useful, including many projects outside of Decred as well. Thus, this moves the new uint256 package from the internal staging area to math/uint256 where it will serve as a base for a new math/uint256 module release. Finally, it updates all relevant paths and package README.md accordingly.
25 lines
777 B
Go
25 lines
777 B
Go
// Copyright (c) 2021 The Decred developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package uint256_test
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import (
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"fmt"
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"github.com/decred/dcrd/math/uint256"
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)
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// This example demonstrates calculating the result of dividing a max unsigned
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// 256-bit integer by a max unsigned 128-bit integer and outputting that result
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// in hex with leading zeros.
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func Example_basicUsage() {
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// Calculate maxUint256 / maxUint128 and output it in hex with leading zeros.
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maxUint128 := new(uint256.Uint256).SetUint64(1).Lsh(128).SubUint64(1)
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result := new(uint256.Uint256).Not().Div(maxUint128)
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fmt.Printf("result: %064x\n", result)
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// Output:
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// result: 0000000000000000000000000000000100000000000000000000000000000001
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}
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