89 lines
3.0 KiB
GDScript
89 lines
3.0 KiB
GDScript
# MIT License
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#
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# Copyright (c) 2023 Xavier Sellier
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# Note: The code might not be as pretty it could be, since it's written
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# in a way that maximizes performance. Methods are inlined and loops are avoided.
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class_name UUID
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const BYTE_MASK: int = 0b11111111
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static func uuidbin() -> Array:
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randomize()
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# 16 random bytes with the bytes on index 6 and 8 modified
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return [
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randi() & BYTE_MASK, randi() & BYTE_MASK, randi() & BYTE_MASK, randi() & BYTE_MASK,
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randi() & BYTE_MASK, randi() & BYTE_MASK, ((randi() & BYTE_MASK) & 0x0f) | 0x40, randi() & BYTE_MASK,
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((randi() & BYTE_MASK) & 0x3f) | 0x80, randi() & BYTE_MASK, randi() & BYTE_MASK, randi() & BYTE_MASK,
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randi() & BYTE_MASK, randi() & BYTE_MASK, randi() & BYTE_MASK, randi() & BYTE_MASK,
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]
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static func uuidbinrng(rng: RandomNumberGenerator) -> Array:
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rng.randomize()
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return [
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rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK,
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rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK, ((rng.randi() & BYTE_MASK) & 0x0f) | 0x40, rng.randi() & BYTE_MASK,
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((rng.randi() & BYTE_MASK) & 0x3f) | 0x80, rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK,
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rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK, rng.randi() & BYTE_MASK,
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]
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static func v4() -> String:
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# 16 random bytes with the bytes on index 6 and 8 modified
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var b = uuidbin()
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return '%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x' % [
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# low
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b[0], b[1], b[2], b[3],
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# mid
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b[4], b[5],
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# hi
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b[6], b[7],
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# clock
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b[8], b[9],
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# clock
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b[10], b[11], b[12], b[13], b[14], b[15]
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]
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static func v4_rng(rng: RandomNumberGenerator) -> String:
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# 16 random bytes with the bytes on index 6 and 8 modified
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var b = uuidbinrng(rng)
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return '%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x' % [
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# low
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b[0], b[1], b[2], b[3],
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# mid
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b[4], b[5],
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# hi
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b[6], b[7],
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# clock
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b[8], b[9],
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# clock
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b[10], b[11], b[12], b[13], b[14], b[15]
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]
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