Initial project import

tools/v/vlib/crypto/rand/rand_solaris.c.v

@@ -0,0 +1,41 @@
+// Copyright (c) 2019-2024 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 rand
+
+#include <sys/random.h>
+
+fn C.getrandom(p &u8, n usize, flags u32) i32
+
+const read_batch_size = 256
+
+// read returns an array of `bytes_needed` random bytes read from the OS.
+pub fn read(bytes_needed int) ![]u8 {
+	mut buffer := unsafe { malloc_noscan(bytes_needed) }
+	mut bytes_read := 0
+	mut remaining_bytes := bytes_needed
+	// getrandom syscall wont block if requesting <= 256 bytes
+	for bytes_read < bytes_needed {
+		batch_size := if remaining_bytes > read_batch_size {
+			read_batch_size
+		} else {
+			remaining_bytes
+		}
+		rbytes := unsafe { getrandom(batch_size, buffer + bytes_read) }
+		if rbytes == -1 {
+			unsafe { free(buffer) }
+			return &ReadError{}
+		}
+		bytes_read += rbytes
+		remaining_bytes -= rbytes
+	}
+	return unsafe { buffer.vbytes(bytes_needed) }
+}
+
+fn v_getrandom(bytes_needed int, buffer voidptr) int {
+	if bytes_needed > read_batch_size {
+		panic('getrandom() dont request more than ${read_batch_size} bytes at once.')
+	}
+	return C.getrandom(buffer, bytes_needed, 0)
+}