50 lines
1.6 KiB
V
50 lines
1.6 KiB
V
// Copyright (c) 2019-2022 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module config
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import rand.seed
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// PRNGConfigStruct is a configuration struct for creating a new instance of the default RNG.
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// Note that the RNGs may have a different number of u32s required for seeding. The default
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// generator WyRand used 64 bits, ie. 2 u32s so that is the default. In case your desired generator
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// uses a different number of u32s, use the `seed.time_seed_array()` method with the correct
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// number of u32s.
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[params]
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pub struct PRNGConfigStruct {
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pub:
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seed_ []u32 = seed.time_seed_array(2)
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}
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// Configuration struct for generating normally distributed floats. The default value for
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// `mu` is 0 and the default value for `sigma` is 1.
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[params]
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pub struct NormalConfigStruct {
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pub:
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mu f64 = 0.0
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sigma f64 = 1.0
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}
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// Configuration struct for the shuffle functions.
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// The start index is inclusive and the end index is exclusive.
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// Set the end to 0 to shuffle until the end of the array.
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[params]
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pub struct ShuffleConfigStruct {
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pub:
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start int
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end int
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}
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// validate_for is a helper function for validating the configuration struct for the given array.
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pub fn (config ShuffleConfigStruct) validate_for<T>(a []T) ? {
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if config.start < 0 || config.start >= a.len {
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return error("argument 'config.start' must be in range [0, a.len)")
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}
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if config.end < 0 || config.end > a.len {
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return error("argument 'config.end' must be in range [0, a.len]")
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}
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if config.end != 0 && config.end <= config.start {
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return error("argument 'config.end' must be greater than 'config.start'")
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}
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}
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