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//go:build darwin || tinygo.wasm
// +build darwin tinygo.wasm
// This implementation of crypto/rand uses the arc4random_buf function
// (available on both MacOS and WASI) to generate random numbers.
//
// Note: arc4random_buf (unlike what the name suggets) does not use the insecure
// RC4 cipher. Instead, it uses a high-quality cipher, varying by the libc
// implementation.
package rand
import "unsafe"
func init() {
Reader = &reader{}
}
type reader struct {
}
func (r *reader) Read(b []byte) (n int, err error) {
if len(b) != 0 {
libc_arc4random_buf(unsafe.Pointer(&b[0]), uint(len(b)))
}
return len(b), nil
}
// void arc4random_buf(void *buf, size_t buflen);
//export arc4random_buf
func libc_arc4random_buf(buf unsafe.Pointer, buflen uint)
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