From b08ea25c201b6c53661f69a427a9ffd64def8e46 Mon Sep 17 00:00:00 2001
From: chai2010 <chaishushan@gmail.com>
Date: Wed, 4 Oct 2023 06:45:59 +0800
Subject: [PATCH] =?UTF-8?q?math/rand=20=E5=A2=9E=E5=8A=A0=20GetRandomData?=
 =?UTF-8?q?=20=E5=87=BD=E6=95=B0?=
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---
 waroot/src/math/rand/rand_1wasi.wa |  7 +++++++
 waroot/src/math/rand/rand_wasi.wa  | 16 ++++++++++++++++
 waroot/src/math/rand/reader.wa     |  5 +++++
 3 files changed, 28 insertions(+)
 create mode 100644 waroot/src/math/rand/rand_1wasi.wa
 create mode 100644 waroot/src/math/rand/rand_wasi.wa
 create mode 100644 waroot/src/math/rand/reader.wa

diff --git a/waroot/src/math/rand/rand_1wasi.wa b/waroot/src/math/rand/rand_1wasi.wa
new file mode 100644
index 0000000..08eb2b2
--- /dev/null
+++ b/waroot/src/math/rand/rand_1wasi.wa
@@ -0,0 +1,7 @@
+// 版权 @2023 凹语言 作者。保留所有权利。
+
+#wa:build !wasi
+
+func getRandomData(r: []byte) => error {
+	return errors.New("rand.GetRandomData: unsupport")
+}
diff --git a/waroot/src/math/rand/rand_wasi.wa b/waroot/src/math/rand/rand_wasi.wa
new file mode 100644
index 0000000..f2b11a9
--- /dev/null
+++ b/waroot/src/math/rand/rand_wasi.wa
@@ -0,0 +1,16 @@
+// 版权 @2023 凹语言 作者。保留所有权利。
+
+import (
+	"errors"
+	"runtime"
+)
+
+#wa:import wasi_snapshot_preview1 random_get
+func wasi_random_get(buf: i32, bufLen: i32) => (errno: i32)
+
+func getRandomData(r: []byte) => error {
+	if wasi_random_get(runtime.WaBytesToPtr(r), i32(len(r))) != 0 {
+		return errors.New("wasi_random_get failed")
+	}
+	return nil
+}
diff --git a/waroot/src/math/rand/reader.wa b/waroot/src/math/rand/reader.wa
new file mode 100644
index 0000000..850ac15
--- /dev/null
+++ b/waroot/src/math/rand/reader.wa
@@ -0,0 +1,5 @@
+// 版权 @2023 凹语言 作者。保留所有权利。
+
+func GetRandomData(r: []byte) => error {
+	return getRandomData(r)
+}