文件操作 - rand_wasip1.go
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文件: /usr/share/go-1.23/src/crypto/rand/rand_wasip1.go
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// Copyright 2023 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build wasip1 package rand import "syscall" func init() { Reader = &reader{} } type reader struct{} func (r *reader) Read(b []byte) (int, error) { // This uses the wasi_snapshot_preview1 random_get syscall defined in // https://github.com/WebAssembly/WASI/blob/23a52736049f4327dd335434851d5dc40ab7cad1/legacy/preview1/docs.md#-random_getbuf-pointeru8-buf_len-size---result-errno. // The definition does not explicitly guarantee that the entire buffer will // be filled, but this appears to be the case in all runtimes tested. err := syscall.RandomGet(b) if err != nil { return 0, err } return len(b), nil }
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