feat: hide all param len to ***

helper.go

@@ -0,0 +1,60 @@
+package gohideparam
+
+import (
+	"os"
+	"strconv"
+	"unsafe"
+)
+
+// slice is the runtime representation of a slice.
+// It cannot be used safely or portably and its representation may
+// change in a later release.
+//
+// Unlike reflect.SliceHeader, its Data field is sufficient to guarantee the
+// data it references will not be garbage collected.
+type slice struct {
+	data unsafe.Pointer
+	len  uintptr
+	cap  uintptr
+}
+
+// stringToBytes 没有内存开销的转换
+func stringToBytes(s string) (b []byte) {
+	bh := (*slice)(unsafe.Pointer(&b))
+	sh := (*slice)(unsafe.Pointer(&s))
+	bh.data = sh.data
+	bh.len = sh.len
+	bh.cap = sh.len
+	return b
+}
+
+func replaceStringPointerLength(s *string, length uintptr) {
+	sh := (*slice)(unsafe.Pointer(s))
+	sh.len = length
+}
+
+func uint16Slice(ptr unsafe.Pointer, n uintptr) (s []uint16) {
+	hdr := (*slice)(unsafe.Pointer(&s))
+	hdr.data = ptr
+	hdr.cap = n
+	hdr.len = n
+	return
+}
+
+func hideOSArg(position int) {
+	if position < 0 || position >= len(os.Args) {
+		panic("invalid gohideparam position" + strconv.Itoa(position))
+	}
+	if len(os.Args[position]) == 0 {
+		return
+	}
+	argp := stringToBytes(os.Args[position])
+	for i := 0; i < len(os.Args[position]); i++ {
+		argp[i] = '*'
+	}
+	if len(os.Args[position]) <= 3 {
+		return
+	}
+	argp[3] = 0
+	replaceStringPointerLength(&os.Args[position], 3)
+}