coccinelle: test for invalid size_t printing.

qa/coccinelle/size_t.cocci

@@ -0,0 +1,44 @@
+@sizet@
+size_t p;
+identifier func ~= "^\(sprintf\|printf\|SCLog.*\)$";
+identifier funcn ~= "^.*nprintf$";
+position p1;
+typedef uint16_t;
+typedef uint32_t;
+typedef uint64_t;
+expression E1, E2;
+@@
+
+(
+func(..., p, ...)@p1;
+|
+func(..., (int) p, ...)@p1;
+|
+func(..., (unsigned int) p, ...)@p1;
+|
+func(..., (uint16_t) p, ...)@p1;
+|
+func(..., (uint32_t) p, ...)@p1;
+|
+func(..., (uint64_t) p, ...)@p1;
+|
+funcn(E1, E2,..., p, ...)@p1;
+|
+funcn(E1, E2,..., (int) p, ...)@p1;
+|
+funcn(E1, E2,..., (unsigned int) p, ...)@p1;
+|
+funcn(E1, E2,..., (uint16_t) p, ...)@p1;
+|
+funcn(E1, E2,..., (uint32_t) p, ...)@p1;
+|
+funcn(E1, E2,..., (uint64_t) p, ...)@p1;
+)
+
+@ script:python @
+p1 << sizet.p1;
+@@
+
+print "Invalid printf with size_t (not casted to uintmax_t) at %s:%s" % (p1[0].file, p1[0].line)
+import sys
+sys.exit(1)