Use Pascal strings in place of null-termination; update documentation

0.go

@@ -0,0 +1,30 @@
+package main
+
+/*
+typedef struct {
+    char* data;
+    int len;
+} PascalString;
+*/
+import "C"
+
+// getPascalString returns a pascal
+// string struct for the input Go string.
+func getPascalString(goString string) C.PascalString {
+	goStringBytes := []byte(goString)
+	goStringPtr := C.CBytes(goStringBytes)
+	return C.PascalString{
+		data: (*C.char)(goStringPtr),
+		len:  C.int(len(goStringBytes)),
+	}
+}
+
+// getPascalStringFromBytes returns a pascal
+// string struct for the input Go byte slice.
+func getPascalStringFromBytes(goBytes []byte) C.PascalString {
+	goBytesPtr := C.CBytes(goBytes)
+	return C.PascalString{
+		data: (*C.char)(goBytesPtr),
+		len:  C.int(len(goBytes)),
+	}
+}