Adds most of the toolsHEADmaster

1 files changed, 225 insertions, 0 deletions

diff --git a/v_windows/v/vlib/rand/splitmix64/splitmix64.v b/v_windows/v/vlib/rand/splitmix64/splitmix64.v
new file mode 100644
index 0000000..d3cb9d1
--- /dev/null
+++ b/v_windows/v/vlib/rand/splitmix64/splitmix64.v
@@ -0,0 +1,225 @@
+// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+module splitmix64
+
+import rand.seed
+import rand.constants
+
+// SplitMix64RNG ported from http://xoshiro.di.unimi.it/splitmix64.c
+pub struct SplitMix64RNG {
+mut:
+	state     u64 = seed.time_seed_64()
+	has_extra bool
+	extra     u32
+}
+
+// seed sets the seed of the accepting SplitMix64RNG to the given data
+// in little-endian format (i.e. lower 32 bits are in [0] and higher 32 bits in [1]).
+pub fn (mut rng SplitMix64RNG) seed(seed_data []u32) {
+	if seed_data.len != 2 {
+		eprintln('SplitMix64RNG needs 2 32-bit unsigned integers as the seed.')
+		exit(1)
+	}
+	rng.state = seed_data[0] | (u64(seed_data[1]) << 32)
+	rng.has_extra = false
+}
+
+// u32 updates the PRNG state and returns the next pseudorandom `u32`.
+[inline]
+pub fn (mut rng SplitMix64RNG) u32() u32 {
+	if rng.has_extra {
+		rng.has_extra = false
+		return rng.extra
+	}
+	full_value := rng.u64()
+	lower := u32(full_value & constants.lower_mask)
+	upper := u32(full_value >> 32)
+	rng.extra = upper
+	rng.has_extra = true
+	return lower
+}
+
+// u64 updates the PRNG state and returns the next pseudorandom `u64`.
+[inline]
+pub fn (mut rng SplitMix64RNG) u64() u64 {
+	rng.state += (0x9e3779b97f4a7c15)
+	mut z := rng.state
+	z = (z ^ ((z >> u64(30)))) * (0xbf58476d1ce4e5b9)
+	z = (z ^ ((z >> u64(27)))) * (0x94d049bb133111eb)
+	return z ^ (z >> (31))
+}
+
+// u32n returns a pseudorandom `u32` less than `bound`.
+[inline]
+pub fn (mut rng SplitMix64RNG) u32n(bound u32) u32 {
+	// This function is kept similar to the u64 version
+	if bound == 0 {
+		eprintln('max must be non-zero')
+		exit(1)
+	}
+	threshold := -bound % bound
+	for {
+		r := rng.u32()
+		if r >= threshold {
+			return r % bound
+		}
+	}
+	return u32(0)
+}
+
+// u64n returns a pseudorandom `u64` less than `bound`.
+[inline]
+pub fn (mut rng SplitMix64RNG) u64n(bound u64) u64 {
+	// See pcg32.v for explanation of comment. This algorithm
+	// existed before the refactoring.
+	if bound == 0 {
+		eprintln('max must be non-zero')
+		exit(1)
+	}
+	threshold := -bound % bound
+	for {
+		r := rng.u64()
+		if r >= threshold {
+			return r % bound
+		}
+	}
+	return u64(0)
+}
+
+// u32n returns a pseudorandom `u32` value that is guaranteed to be in range `[min, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) u32_in_range(min u32, max u32) u32 {
+	if max <= min {
+		eprintln('max must be greater than min')
+		exit(1)
+	}
+	return min + rng.u32n(max - min)
+}
+
+// u64n returns a pseudorandom `u64` value that is guaranteed to be in range `[min, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) u64_in_range(min u64, max u64) u64 {
+	if max <= min {
+		eprintln('max must be greater than min')
+		exit(1)
+	}
+	return min + rng.u64n(max - min)
+}
+
+// int returns a pseudorandom 32-bit (possibly negative) `int`.
+[inline]
+pub fn (mut rng SplitMix64RNG) int() int {
+	return int(rng.u32())
+}
+
+// i64 returns a pseudorandom 64-bit (possibly negative) `i64`.
+[inline]
+pub fn (mut rng SplitMix64RNG) i64() i64 {
+	return i64(rng.u64())
+}
+
+// int31 returns a positive pseudorandom 31-bit `int`.
+[inline]
+pub fn (mut rng SplitMix64RNG) int31() int {
+	return int(rng.u32() & constants.u31_mask) // Set the 32nd bit to 0.
+}
+
+// int63 returns a positive pseudorandom 63-bit `i64`.
+[inline]
+pub fn (mut rng SplitMix64RNG) int63() i64 {
+	return i64(rng.u64() & constants.u63_mask) // Set the 64th bit to 0.
+}
+
+// intn returns a pseudorandom `int` in range `[0, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) intn(max int) int {
+	if max <= 0 {
+		eprintln('max has to be positive.')
+		exit(1)
+	}
+	return int(rng.u32n(u32(max)))
+}
+
+// i64n returns a pseudorandom `i64` in range `[0, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) i64n(max i64) i64 {
+	if max <= 0 {
+		eprintln('max has to be positive.')
+		exit(1)
+	}
+	return i64(rng.u64n(u64(max)))
+}
+
+// int_in_range returns a pseudorandom `int` in range `[min, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) int_in_range(min int, max int) int {
+	if max <= min {
+		eprintln('max must be greater than min')
+		exit(1)
+	}
+	// This supports negative ranges like [-10, -5) because the difference is positive
+	return min + rng.intn(max - min)
+}
+
+// i64_in_range returns a pseudorandom `i64` in range `[min, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) i64_in_range(min i64, max i64) i64 {
+	if max <= min {
+		eprintln('max must be greater than min')
+		exit(1)
+	}
+	return min + rng.i64n(max - min)
+}
+
+// f32 returns a pseudorandom `f32` value in range `[0, 1)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) f32() f32 {
+	return f32(rng.u32()) / constants.max_u32_as_f32
+}
+
+// f64 returns a pseudorandom `f64` value in range `[0, 1)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) f64() f64 {
+	return f64(rng.u64()) / constants.max_u64_as_f64
+}
+
+// f32n returns a pseudorandom `f32` value in range `[0, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) f32n(max f32) f32 {
+	if max <= 0 {
+		eprintln('max has to be positive.')
+		exit(1)
+	}
+	return rng.f32() * max
+}
+
+// f64n returns a pseudorandom `f64` value in range `[0, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) f64n(max f64) f64 {
+	if max <= 0 {
+		eprintln('max has to be positive.')
+		exit(1)
+	}
+	return rng.f64() * max
+}
+
+// f32_in_range returns a pseudorandom `f32` in range `[min, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) f32_in_range(min f32, max f32) f32 {
+	if max <= min {
+		eprintln('max must be greater than min')
+		exit(1)
+	}
+	return min + rng.f32n(max - min)
+}
+
+// i64_in_range returns a pseudorandom `i64` in range `[min, max)`.
+[inline]
+pub fn (mut rng SplitMix64RNG) f64_in_range(min f64, max f64) f64 {
+	if max <= min {
+		eprintln('max must be greater than min')
+		exit(1)
+	}
+	return min + rng.f64n(max - min)
+}