From f7d7f81c49953ff5d1579115751c2177f0685646 Mon Sep 17 00:00:00 2001
From: xushiwei <x@goplus.org>
Date: Thu, 20 Jun 2024 11:05:43 +0800
Subject: [PATCH] library: strconv

---
 README.md                                |  1 +
 _demo/strconv/strconv.go                 |  7 +++++++
 cl/import.go                             |  9 +++++++--
 internal/build/build.go                  | 24 ++++++++++++++----------
 internal/lib/internal/bytealg/bytealg.go | 22 ++++++++++++++++++++++
 5 files changed, 51 insertions(+), 12 deletions(-)
 create mode 100644 _demo/strconv/strconv.go
 create mode 100644 internal/lib/internal/bytealg/bytealg.go

diff --git a/README.md b/README.md
index eb52c41ed..9628e7979 100644
--- a/README.md
+++ b/README.md
@@ -209,6 +209,7 @@ Here are the Go packages that can be imported correctly:
 * [math](https://pkg.go.dev/math)
 * [math/bits](https://pkg.go.dev/math/bits)
 * [math/cmplx](https://pkg.go.dev/math/cmplx)
+* [strconv](https://pkg.go.dev/strconv)
 * [syscall](https://pkg.go.dev/syscall) (partially)
 * [sync](https://pkg.go.dev/sync) (partially)
 * [sync/atomic](https://pkg.go.dev/sync/atomic) (partially)
diff --git a/_demo/strconv/strconv.go b/_demo/strconv/strconv.go
new file mode 100644
index 000000000..461598c13
--- /dev/null
+++ b/_demo/strconv/strconv.go
@@ -0,0 +1,7 @@
+package main
+
+import "strconv"
+
+func main() {
+	println(strconv.Itoa(-123))
+}
diff --git a/cl/import.go b/cl/import.go
index ae85ed511..e780e5e59 100644
--- a/cl/import.go
+++ b/cl/import.go
@@ -518,10 +518,15 @@ func ignoreName(name string) bool {
 		return true
 	}
 	*/
-	return strings.HasPrefix(name, "internal/") || strings.HasPrefix(name, "crypto/") ||
+	return (strings.HasPrefix(name, "internal/") && !supportedInternal(name)) ||
+		strings.HasPrefix(name, "crypto/") || strings.HasPrefix(name, "reflect.") ||
 		strings.HasPrefix(name, "arena.") || strings.HasPrefix(name, "maps.") ||
 		strings.HasPrefix(name, "time.") || strings.HasPrefix(name, "runtime/") ||
-		strings.HasPrefix(name, "plugin.") || strings.HasPrefix(name, "reflect.")
+		strings.HasPrefix(name, "plugin.")
+}
+
+func supportedInternal(name string) bool {
+	return strings.HasPrefix(name, "internal/bytealg.")
 }
 
 // -----------------------------------------------------------------------------
diff --git a/internal/build/build.go b/internal/build/build.go
index ad28295b3..7e73151b8 100644
--- a/internal/build/build.go
+++ b/internal/build/build.go
@@ -706,6 +706,9 @@ func decodeFile(outFile string, zipf *zip.File) (err error) {
 }
 
 func canSkipToBuild(pkgPath string) bool {
+	if _, ok := hasAltPkg[pkgPath]; ok {
+		return false
+	}
 	switch pkgPath {
 	case "unsafe":
 		return true
@@ -718,16 +721,17 @@ func canSkipToBuild(pkgPath string) bool {
 type none struct{}
 
 var hasAltPkg = map[string]none{
-	"errors":      {},
-	"io":          {},
-	"io/fs":       {},
-	"math":        {},
-	"math/cmplx":  {},
-	"sync":        {},
-	"sync/atomic": {},
-	"syscall":     {},
-	"os":          {},
-	"runtime":     {},
+	"errors":           {},
+	"internal/bytealg": {},
+	"io":               {},
+	"io/fs":            {},
+	"math":             {},
+	"math/cmplx":       {},
+	"sync":             {},
+	"sync/atomic":      {},
+	"syscall":          {},
+	"os":               {},
+	"runtime":          {},
 }
 
 func check(err error) {
diff --git a/internal/lib/internal/bytealg/bytealg.go b/internal/lib/internal/bytealg/bytealg.go
new file mode 100644
index 000000000..466b7271b
--- /dev/null
+++ b/internal/lib/internal/bytealg/bytealg.go
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package bytealg
+
+// llgo:skip init
+import (
+	_ "unsafe"
+)