1 files changed, 75 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/strncpy.c b/gcc/testsuite/gcc.c-torture/execute/builtins/strncpy.c
new file mode 100644
index 000000000..9918cdf6a
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtins/strncpy.c
@@ -0,0 +1,75 @@
+/* Copyright (C) 2000, 2005  Free Software Foundation.
+
+   Ensure all expected transformations of builtin strncpy occur and
+   perform correctly.
+
+   Written by Kaveh R. Ghazi, 11/25/2000.  */
+
+extern void abort (void);
+typedef __SIZE_TYPE__ size_t;
+extern char *strncpy (char *, const char *, size_t);
+extern int memcmp (const void *, const void *, size_t);
+extern void *memset (void *, int, size_t);
+
+/* Reset the destination buffer to a known state. */
+#define RESET_DST memset(dst, 'X', sizeof(dst))
+
+int i;
+
+void
+main_test (void)
+{
+  const char *const src = "hello world";
+  const char *src2;
+  char dst[64], *dst2;
+  
+  RESET_DST;
+  if (strncpy (dst, src, 4) != dst || memcmp (dst, "hellXXX", 7))
+    abort();
+
+  RESET_DST;
+  if (strncpy (dst+16, src, 4) != dst+16 || memcmp (dst+16, "hellXXX", 7))
+    abort();
+
+  RESET_DST;
+  if (strncpy (dst+32, src+5, 4) != dst+32 || memcmp (dst+32, " worXXX", 7))
+    abort();
+
+  RESET_DST;
+  dst2 = dst;
+  if (strncpy (++dst2, src+5, 4) != dst+1 || memcmp (dst2, " worXXX", 7)
+      || dst2 != dst+1)
+    abort();
+
+  RESET_DST;
+  if (strncpy (dst, src, 0) != dst || memcmp (dst, "XXX", 3))
+    abort();
+  
+  RESET_DST;
+  dst2 = dst; src2 = src;
+  if (strncpy (++dst2, ++src2, 0) != dst+1 || memcmp (dst2, "XXX", 3)
+      || dst2 != dst+1 || src2 != src+1)
+    abort();
+
+  RESET_DST;
+  dst2 = dst; src2 = src;
+  if (strncpy (++dst2+5, ++src2+5, 0) != dst+6 || memcmp (dst2+5, "XXX", 3)
+      || dst2 != dst+1 || src2 != src+1)
+    abort();
+
+  RESET_DST;
+  if (strncpy (dst, src, 12) != dst || memcmp (dst, "hello world\0XXX", 15))
+    abort();
+
+  /* Test at least one instance of the __builtin_ style.  We do this
+     to ensure that it works and that the prototype is correct.  */
+  RESET_DST;
+  if (__builtin_strncpy (dst, src, 4) != dst || memcmp (dst, "hellXXX", 7))
+    abort();
+
+  RESET_DST;
+  if (strncpy (dst, i++ ? "xfoo" + 1 : "bar", 4) != dst
+      || memcmp (dst, "bar\0XXX", 7)
+      || i != 1)
+    abort ();
+}