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https://github.com/vacp2p/linea-monorepo.git
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aeb86855ae
* clean(prover): more hilo into zkevm/prover/common * feat(codehash): implements the module connecting the codehash and the statesummary * clean(ss): apply the changes for the statesummary * feat(rand): moves everything to use rand/v2 * feat(csv): adds WriteExplicit * feat(codehash): implements the consistency module * fix(rng): Int31n -> Int32N * fix(lint): pass the use of test-rng * clean: clean one of the comment to remove debugging data * fix(test): fix conversion test and also simplify the use of rng * feat(codehash): enable the codehash consistency module * reconnect the execution data hasher with the public input * revert the rand/v2 for the testcase-gen of the contracts
36 lines
923 B
Go
36 lines
923 B
Go
package utils
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import (
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"math/rand/v2"
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"unsafe"
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)
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// NewRandSource returns a [rand.ChaCha8] initialized with an integer seed. The
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// function is meant to sugar-coat the numerous testcases of the repo.
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func NewRandSource(seed int64) *rand.ChaCha8 {
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if seed < 0 {
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seed = -seed
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}
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var (
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seedU64 = uint64(seed)
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seed8Bytes = *(*[8]byte)(unsafe.Pointer(&seedU64))
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seed32Bytes = [32]byte{}
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)
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copy(seed32Bytes[:], seed8Bytes[:])
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return rand.NewChaCha8(seed32Bytes)
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}
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// ReadPseudoRand populate slices with bytes generated from rand. It returns the
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// number of bytes read and an error to match with [io.Read]. This function is
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// intended as a drop-in replacement for [math/rand.Read]. `n` is always the
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// len(slice) and err is always `nil`.
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func ReadPseudoRand(rng *rand.Rand, slice []byte) (n int, err error) {
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for i := range slice {
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slice[i] = byte(rng.Uint32() & 0xff)
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}
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return len(slice), nil
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}
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