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-rw-r--r--string/tester.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/string/tester.c b/string/tester.c
index 23d0af8acb..0e65442063 100644
--- a/string/tester.c
+++ b/string/tester.c
@@ -107,6 +107,19 @@ main (void)
(void) strcpy (one, "");
equal (one, "", 7); /* Boundary condition. */
+ /* A closely related function is stpcpy. */
+ it = "stpcpy";
+ check ((stpcpy (one, "abcde") - one) == 5, 1);
+ equal (one, "abcde", 2);
+
+ check ((stpcpy (one, "x") - one) == 1, 3);
+ equal (one, "x", 4); /* Writeover. */
+ equal (one+2, "cde", 5); /* Wrote too much? */
+
+ check ((stpcpy (stpcpy (stpcpy (one, "a"), "b"), "c") - one) == 3, 6);
+ equal (one, "abc", 7);
+ equal (one + 4, "e", 8);
+
/* stpncpy. */
it = "stpncpy";