compiler: build separation runtime with clite

runtime/internal/lib/syscall/syscall_unix.go

@@ -0,0 +1,71 @@
+// Copyright 2009 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 unix
+
+package syscall
+
+import (
+	"unsafe"
+
+	c "github.com/goplus/llgo/runtime/internal/clite"
+	"github.com/goplus/llgo/runtime/internal/clite/syscall"
+	"github.com/goplus/llgo/runtime/internal/lib/internal/oserror"
+)
+
+var (
+	Stdin  = 0
+	Stdout = 1
+	Stderr = 2
+)
+
+type Errno uintptr
+
+func (e Errno) Error() string {
+	ret := c.Strerror(c.Int(e))
+	return unsafe.String((*byte)(unsafe.Pointer(ret)), c.Strlen(ret))
+}
+
+func (e Errno) Is(target error) bool {
+	switch target {
+	case oserror.ErrPermission:
+		return e == Errno(syscall.EACCES) || e == Errno(syscall.EPERM)
+	case oserror.ErrExist:
+		return e == Errno(syscall.EEXIST) || e == Errno(syscall.ENOTEMPTY)
+	case oserror.ErrNotExist:
+		return e == Errno(syscall.ENOENT)
+		// TODO(xsw): go1.21
+		// case errors.ErrUnsupported:
+		//	return e == ENOSYS || e == ENOTSUP || e == EOPNOTSUPP
+	}
+	return false
+}
+
+func (e Errno) Temporary() bool {
+	return e == Errno(syscall.EINTR) || e == Errno(syscall.EMFILE) ||
+		e == Errno(syscall.ENFILE) || e.Timeout()
+}
+
+func (e Errno) Timeout() bool {
+	return e == Errno(syscall.EAGAIN) || e == Errno(syscall.EWOULDBLOCK) || e == Errno(syscall.ETIMEDOUT)
+}
+
+// A Signal is a number describing a process signal.
+// It implements the os.Signal interface.
+type Signal int
+
+func (s Signal) Signal() {}
+
+func (s Signal) String() string {
+	/*
+		if 0 <= s && int(s) < len(signals) {
+			str := signals[s]
+			if str != "" {
+				return str
+			}
+		}
+		return "signal " + itoa.Itoa(int(s))
+	*/
+	panic("todo: syscall.Signal.String")
+}