X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdlib%2Fstrtoull.c;h=a28bb45d5ef7c7fca86e85feae554d3e45a320b9;hb=d1954049a406af2992113a783539aa5d86cfdfa8;hp=a65779cfadd6be34fab012fca92f753d328aa736;hpb=d6d203fea231852be420114176c3b9224cd8ce93;p=pdclib.old

diff --git a/functions/stdlib/strtoull.c b/functions/stdlib/strtoull.c
index a65779c..a28bb45 100644
--- a/functions/stdlib/strtoull.c
+++ b/functions/stdlib/strtoull.c
@@ -75,6 +75,26 @@ int main( void )
     endptr = NULL;
     TESTCASE( strtoull( overflow, &endptr, 0 ) == 0 );
     TESTCASE( endptr == overflow );
+    errno = 0;
+/* long long -> 64 bit */
+#if ULLONG_MAX >> 63 == 1
+    /* testing "even" overflow, i.e. base is power of two */
+    TESTCASE( strtoull( "18446744073709551615", NULL, 0 ) == ULLONG_MAX );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoull( "18446744073709551616", NULL, 0 ) == ULLONG_MAX );
+    TESTCASE( errno == ERANGE );
+    /* TODO: test "odd" overflow, i.e. base is not power of two */
+/* long long -> 128 bit */
+#elif ULLONG_MAX >> 127 == 1
+    /* testing "even" overflow, i.e. base is power of two */
+    TESTCASE( strtoull( "340282366920938463463374607431768211455", NULL, 0 ) == ULLONG_MAX );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoull( "340282366920938463463374607431768211456", NULL, 0 ) == ULLONG_MAX );
+    TESTCASE( errno == ERANGE );
+    /* TODO: test "odd" overflow, i.e. base is not power of two */
+#else
+#error Unsupported width of 'long long' (neither 64 nor 128 bit).
+#endif
     return TEST_RESULTS;
 }