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42 lines
762 B
Plaintext
42 lines
762 B
Plaintext
// Copyright (c) 2021 Christoffer Lerno. All rights reserved.
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// Use of this source code is governed by the MIT license
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// a copy of which can be found in the LICENSE_STDLIB file.
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module std::hash::fnv32a;
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distinct Fnv32a = uint;
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const FNV32A_START @private = 0x811c9dc5;
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const FNV32A_MUL @private = 0x01000193;
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macro void update(h, char x) @private => *h = (*h ^ ($typeof(*h))x) * FNV32A_MUL;
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fn void Fnv32a.init(&self)
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{
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*self = FNV32A_START;
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}
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fn void Fnv32a.update(&self, char[] data)
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{
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Fnv32a h = *self;
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foreach (char x : data)
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{
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update(&h, x);
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}
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*self = h;
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}
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macro void Fnv32a.update_char(&self, char c)
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{
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update(self, c);
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}
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fn uint encode(char[] data)
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{
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uint h = FNV32A_START;
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foreach (char x : data)
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{
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update(&h, x);
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}
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return h;
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}
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