New calling conventions, start on print.cpp

luprex/core/cpp/print.cpp

@@ -0,0 +1,32 @@
+#include "print.hpp"
+#include "util.hpp"
+#include <ostream>
+#include <iostream>
+
+void luai_writestring(const char *s, size_t len) {
+    std::cout.write(s, len);
+}
+
+void luai_writeline() {
+    std::cout << std::endl;
+    std::cout.flush();
+}
+
+LuaDefine(string_isidentifier, "c") {
+    LuaArg str;
+    LuaRet result;
+    LuaStack LS(L, str, result);
+    if (LS.isstring(str)) {
+        std::string s = LS.ckstring(str);
+        LS.set(result, util::is_identifier(s));
+    } else {
+        LS.set(result, false);
+    }
+    return LS.result();
+}
+
+
+void pprint(LuaStack &LS0, LuaSlot val, int indent, int maxlen, std::ostream *os) {
+
+
+}