X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Finttypes%2Fstrtoumax.c;h=9c9833eda92bd367d462f734e1fde975abf0c9b8;hb=3c7e677c7a6b43ce8bd12021e0af280f08009777;hp=063e7ab681138c18d7c4e1055a8742181be7902d;hpb=fde75f89eae541144585db53ce3f7c29d069b4d2;p=pdclib

diff --git a/functions/inttypes/strtoumax.c b/functions/inttypes/strtoumax.c
old mode 100755
new mode 100644
index 063e7ab..9c9833e
--- a/functions/inttypes/strtoumax.c
+++ b/functions/inttypes/strtoumax.c
@@ -75,6 +75,26 @@ int main( void )
     endptr = NULL;
     TESTCASE( strtoumax( overflow, &endptr, 0 ) == 0 );
     TESTCASE( endptr == overflow );
+    errno = 0;
+/* uintmax_t -> long long -> 64 bit */
+#if UINTMAX_MAX >> 63 == 1
+    /* testing "even" overflow, i.e. base is power of two */
+    TESTCASE( strtoumax( "18446744073709551615", NULL, 0 ) == UINTMAX_MAX );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoumax( "18446744073709551616", NULL, 0 ) == UINTMAX_MAX );
+    TESTCASE( errno == ERANGE );
+    /* TODO: test "odd" overflow, i.e. base is not power of two */
+/* uintmax_t -> long long -> 128 bit */
+#elif UINTMAX_MAX >> 127 == 1
+    /* testing "even" overflow, i.e. base is power of two */
+    TESTCASE( strtoumax( "340282366920938463463374607431768211455", NULL, 0 ) == UINTMAX_MAX );
+    TESTCASE( errno == 0 );
+    TESTCASE( strtoumax( "340282366920938463463374607431768211456", NULL, 0 ) == UINTMAX_MAX );
+    TESTCASE( errno == ERANGE );
+    /* TODO: test "odd" overflow, i.e. base is not power of two */
+#else
+#error Unsupported width of 'uintmax_t' (neither 64 nor 128 bit).
+#endif
     return TEST_RESULTS;
 }