Comment cleanups.

[pdclib] / functions / stdlib / strtoull.c

diff --git a/functions/stdlib/strtoull.c b/functions/stdlib/strtoull.c
index a65779cfadd6be34fab012fca92f753d328aa736..fa866fc78a73c54cff232a528e29ad6b8e80e8ca 100644 (file)
--- a/functions/stdlib/strtoull.c
+++ b/functions/stdlib/strtoull.c
@@ -1,5 +1,3 @@
-/* $Id$ */
-
 /* strtoull( const char *, char * *, int )
 
    This file is part of the Public Domain C Library (PDCLib).
@@ -75,6 +73,26 @@ 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;
 }