commit d38747d951a8a5007e97693cade3551e11e50569
from: Alexander Barton <alex@barton.de>
date: Wed Jan 01 14:57:34 2014 UTC

portabtest: Actually test functions

Test functions snprintf(), strlcpy(), strlcat(), vsnprintf() for
correctness, not only existance (which was quite useless, because
if they weren't available, the program could not have been linked
at all ...).

commit - 18070e5381b7d66963dbe990c98b06b5c601e280
commit + d38747d951a8a5007e97693cade3551e11e50569
blob - 8284c1d027d2af09640f7924050a8148b35bffd3
blob + 4f53ce76594a27fa0d70a551c6e213e66899de47
--- src/portab/portabtest.c
+++ src/portab/portabtest.c
@@ -24,8 +24,83 @@
 
 #include "exp.h"
 
-static void Panic PARAMS((char *Reason));
+static void
+Panic(char *Reason)
+{
+	/* Oops, something failed!? */
+	fprintf(stderr, "Oops, test for %s failed!?\n", Reason);
+	exit(1);
+} /* Panic */
 
+static void
+Check_snprintf(void)
+{
+	char str[5];
+
+	snprintf(str, sizeof(str), "%s", "1234567890");
+	if (str[4] != '\0')
+		Panic("snprintf NULL byte");
+	if (strlen(str) != 4)
+		Panic("snprintf string length");
+}
+
+static void
+Check_strlcpy(void)
+{
+	char str[5];
+
+	if (strlcpy(str, "1234567890", sizeof(str)) != 10)
+		Panic("strlcpy return code");
+	if (str[4] != '\0')
+		Panic("strlcpy NULL byte");
+	if (strlen(str) != 4)
+		Panic("strlcpy string length");
+}
+
+static void
+Check_strlcat(void)
+{
+	char str[5];
+
+	if (strlcpy(str, "12", sizeof(str)) != 2)
+		Panic("strlcpy for strlcat");
+	if (strlcat(str, "1234567890", sizeof(str)) != 12)
+		Panic("strlcat return code");
+	if (str[4] != '\0')
+		Panic("strlcat NULL byte");
+	if (strlen(str) != 4)
+		Panic("strlcat string length");
+}
+
+#ifdef PROTOTYPES
+static void
+Check_vsnprintf(const int Len, const char *Format, ...)
+#else
+static void
+Check_vsnprintf(Len, Format, va_alist)
+const int Len;
+const char *Format;
+va_dcl
+#endif
+{
+	char str[5];
+	va_list ap;
+
+#ifdef PROTOTYPES
+	va_start(ap, Format);
+#else
+	va_start(ap);
+#endif
+	if (vsnprintf(str, sizeof(str), Format, ap) != Len)
+		Panic("vsnprintf return code");
+	va_end(ap);
+
+	if (str[4] != '\0')
+		Panic("vsnprintf NULL byte");
+	if (strlen(str) != 4)
+		Panic("vsnprintf string length");
+}
+
 GLOBAL int
 main(void)
 {
@@ -41,28 +116,13 @@ main(void)
 	if (sizeof(UINT32) != 4)
 		Panic("UINT32");
 
-#ifdef PROTOTYPES
 	/* check functions */
-	if (!snprintf)
-		Panic("snprintf");
-	if (!vsnprintf)
-		Panic("vsnprintf");
-	if (!strlcpy)
-		Panic("strlcpy");
-	if (!strlcat)
-		Panic("strlcat");
-#endif
+	Check_snprintf();
+	Check_strlcpy();
+	Check_strlcat();
+	Check_vsnprintf(2+10, "%s%s", "ab", "1234567890");
 	
-	/* ok, no error */
 	return 0;
-} /* portab_check_types */
+}
 
-static void
-Panic(char *Reason)
-{
-	/* Oops, something failed!? */
-	fprintf(stderr, "Oops, test for %s failed!?", Reason);
-	exit(1);
-} /* Panic */
-
 /* -eof- */