tccpp: Allow computed include like 42.h

The include directive needs to be parsed as pp-tokens, not
as token (i.e. no conversion to TOK_STR or TOK_NUM).  Also fix
parsing computed includes using quoted strings.

tests/42test.h

@@ -0,0 +1,13 @@
+/* This file is to test compute #include directives.  It's named so
+   that it starts with a pre-processing number which isn't a valid
+   number (42test.h).  Including this must work.  */
+#ifndef INC42_FIRST
+int have_included_42test_h;
+#define INC42_FIRST
+#elif !defined INC42_SECOND
+#define INC42_SECOND
+int have_included_42test_h_second;
+#else
+#define INC42_THIRD
+int have_included_42test_h_third;
+#endif

tests/tcctest.c

@@ -44,7 +44,7 @@
 #define TCCLIB_INC <tcclib.h>
 #define TCCLIB_INC1 <tcclib
 #define TCCLIB_INC2 h>
-#define TCCLIB_INC3 "tcclib"
+#define TCCLIB_INC3 "tcclib.h"
 
 #include TCCLIB_INC
 
@@ -52,8 +52,7 @@
 
 #include TCCLIB_INC1.h>
 
-/* gcc 3.2 does not accept that (bug ?) */
-//#include TCCLIB_INC3 ".h"
+#include TCCLIB_INC3
 
 #include <tcclib.h>
 
@@ -61,6 +60,17 @@
 
 #include "tcctest.h"
 
+/* Test two more ways to include a file named like a pp-number */
+#define INC(name) <tests/name.h>
+#define funnyname 42test.h
+#define incdir tests/
+#define incname < incdir funnyname >
+#define __stringify(x) #x
+#define stringify(x) __stringify(x)
+#include INC(42test)
+#include incname
+#include stringify(funnyname)
+
 void intdiv_test();
 void string_test();
 void expr_test();
@@ -396,6 +406,11 @@ comment
     printf("%s\n", __BASE_FILE__);
     printf("%s\n", get_file_from_header());
     printf("%s\n", __FILE__);
+
+    /* Check that funnily named include was in fact included */
+    have_included_42test_h = 1;
+    have_included_42test_h_second = 1;
+    have_included_42test_h_third = 1;
 }