adding some preprocessor test files

extra/c/tests/test5/test5.c

@@ -0,0 +1,3 @@
+#define TABSIZE 100
+
+int table[TABSIZE];

extra/c/tests/test6/test6.c

@@ -0,0 +1 @@
+#define max(a, b) ((a) > (b) ? (a) : (b))

extra/c/tests/test7/test7.c

@@ -0,0 +1,19 @@
+#define x 3 
+#define f(a) f(x * (a)) 
+#undef x 
+#define x 2 
+#define g f 
+#define z z[0] 
+#define h g(~ 
+#define m(a) a(w) 
+#define w 0,1 
+#define t(a) a 
+#define p() int 
+#define q(x) x 
+#define r(x,y) x ## y 
+#define str(x) # x 
+f(y+1) + f(f(z)) % t(t(g)(0) + t)(1); 
+g(x+(3,4)-w) | h 5) & m 
+(f)^m(m); 
+p() i[q()] = { q(1), r(2,3), r(4,), r(,5), r(,) }; 
+char c[2][6] = { str(hello), str() }; 

extra/c/tests/test8/test8.c

@@ -0,0 +1,15 @@
+#define str(s) #s 
+#define xstr(s) str(s) 
+#define debug(s, t) printf("x" # s "= %d, x" # t "= %s", \ 
+x ## s, x ## t) 
+#define INCFILE(n) vers ## n 
+#define glue(a, b) a## b 
+#define xglue(a, b) glue(a, b) 
+#define HIGHLOW "hello" 
+#define LOW LOW ", world" 
+debug(1, 2); 
+fputs(str(strncmp("abc\0d", "abc", '\4') //this goes away 
+== 0) str(: @\n), s); 
+#include xstr(INCFILE(2).h) 
+glue(HIGH, LOW); 
+xglue(HIGH, LOW) 

extra/c/tests/test9/test9.c

@@ -0,0 +1,4 @@
+#define t(x,y,z) x ## y ## z 
+int j[] = { t(1,2,3), t(,4,5), t(6,,7), t(8,9,), 
+t(10,,), t(,11,), t(,,12), t(,,) }; 
+