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authorJoseph Myers <joseph@codesourcery.com>2012-09-24 15:38:21 +0000
committerJoseph Myers <joseph@codesourcery.com>2012-09-24 15:38:21 +0000
commita9f8e53a5b14ba481999ded036b025554ea06362 (patch)
treea59b5925b071a62962c3d399bc8758a690f518bd /stdio-common/tst-printf-round.c
parenteaf6f205fff7ca8a628869e3bc56800020a70f24 (diff)
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Make printf respect the rounding mode for hex output (bug 5044).
Diffstat (limited to 'stdio-common/tst-printf-round.c')
-rw-r--r--stdio-common/tst-printf-round.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/stdio-common/tst-printf-round.c b/stdio-common/tst-printf-round.c
index 2bd4607..7cc19c5 100644
--- a/stdio-common/tst-printf-round.c
+++ b/stdio-common/tst-printf-round.c
@@ -68,6 +68,99 @@ test_dec_in_one_mode (double d, const char *fmt, const char *expected,
}
}
+struct hex_test
+{
+ double d;
+ const char *fmt;
+ const char *rd[4], *rn[4], *rz[4], *ru[4];
+};
+
+static const struct hex_test hex_tests[] =
+ {
+ {
+ 0x1.fffffp+4, "%.1a",
+ { "0x1.fp+4", "0x3.fp+3", "0x7.fp+2", "0xf.fp+1" },
+ { "0x2.0p+4", "0x4.0p+3", "0x8.0p+2", "0x1.0p+5" },
+ { "0x1.fp+4", "0x3.fp+3", "0x7.fp+2", "0xf.fp+1" },
+ { "0x2.0p+4", "0x4.0p+3", "0x8.0p+2", "0x1.0p+5" }
+ },
+ {
+ -0x1.fffffp+4, "%.1a",
+ { "-0x2.0p+4", "-0x4.0p+3", "-0x8.0p+2", "-0x1.0p+5" },
+ { "-0x2.0p+4", "-0x4.0p+3", "-0x8.0p+2", "-0x1.0p+5" },
+ { "-0x1.fp+4", "-0x3.fp+3", "-0x7.fp+2", "-0xf.fp+1" },
+ { "-0x1.fp+4", "-0x3.fp+3", "-0x7.fp+2", "-0xf.fp+1" }
+ },
+ {
+ 0x1.88p+4, "%.1a",
+ { "0x1.8p+4", "0x3.1p+3", "0x6.2p+2", "0xc.4p+1" },
+ { "0x1.8p+4", "0x3.1p+3", "0x6.2p+2", "0xc.4p+1" },
+ { "0x1.8p+4", "0x3.1p+3", "0x6.2p+2", "0xc.4p+1" },
+ { "0x1.9p+4", "0x3.1p+3", "0x6.2p+2", "0xc.4p+1" }
+ },
+ {
+ -0x1.88p+4, "%.1a",
+ { "-0x1.9p+4", "-0x3.1p+3", "-0x6.2p+2", "-0xc.4p+1" },
+ { "-0x1.8p+4", "-0x3.1p+3", "-0x6.2p+2", "-0xc.4p+1" },
+ { "-0x1.8p+4", "-0x3.1p+3", "-0x6.2p+2", "-0xc.4p+1" },
+ { "-0x1.8p+4", "-0x3.1p+3", "-0x6.2p+2", "-0xc.4p+1" }
+ },
+ {
+ 0x1.78p+4, "%.1a",
+ { "0x1.7p+4", "0x2.fp+3", "0x5.ep+2", "0xb.cp+1" },
+ { "0x1.8p+4", "0x2.fp+3", "0x5.ep+2", "0xb.cp+1" },
+ { "0x1.7p+4", "0x2.fp+3", "0x5.ep+2", "0xb.cp+1" },
+ { "0x1.8p+4", "0x2.fp+3", "0x5.ep+2", "0xb.cp+1" }
+ },
+ {
+ -0x1.78p+4, "%.1a",
+ { "-0x1.8p+4", "-0x2.fp+3", "-0x5.ep+2", "-0xb.cp+1" },
+ { "-0x1.8p+4", "-0x2.fp+3", "-0x5.ep+2", "-0xb.cp+1" },
+ { "-0x1.7p+4", "-0x2.fp+3", "-0x5.ep+2", "-0xb.cp+1" },
+ { "-0x1.7p+4", "-0x2.fp+3", "-0x5.ep+2", "-0xb.cp+1" }
+ },
+ {
+ 64.0 / 3.0, "%.1a",
+ { "0x1.5p+4", "0x2.ap+3", "0x5.5p+2", "0xa.ap+1" },
+ { "0x1.5p+4", "0x2.bp+3", "0x5.5p+2", "0xa.bp+1" },
+ { "0x1.5p+4", "0x2.ap+3", "0x5.5p+2", "0xa.ap+1" },
+ { "0x1.6p+4", "0x2.bp+3", "0x5.6p+2", "0xa.bp+1" }
+ },
+ {
+ -64.0 / 3.0, "%.1a",
+ { "-0x1.6p+4", "-0x2.bp+3", "-0x5.6p+2", "-0xa.bp+1" },
+ { "-0x1.5p+4", "-0x2.bp+3", "-0x5.5p+2", "-0xa.bp+1" },
+ { "-0x1.5p+4", "-0x2.ap+3", "-0x5.5p+2", "-0xa.ap+1" },
+ { "-0x1.5p+4", "-0x2.ap+3", "-0x5.5p+2", "-0xa.ap+1" }
+ },
+ };
+
+static int
+test_hex_in_one_mode (double d, const char *fmt, const char *expected[4],
+ const char *mode_name)
+{
+ char buf[100];
+ int ret = snprintf (buf, sizeof buf, fmt, d);
+ if (ret <= 0 || ret >= (int) sizeof buf)
+ {
+ printf ("snprintf for %a returned %d\n", d, ret);
+ return 1;
+ }
+ if (strcmp (buf, expected[0]) == 0
+ || strcmp (buf, expected[1]) == 0
+ || strcmp (buf, expected[2]) == 0
+ || strcmp (buf, expected[3]) == 0)
+ return 0;
+ else
+ {
+ printf ("snprintf (\"%s\", %a) returned \"%s\" not "
+ "\"%s\" or \"%s\" or \"%s\" or \"%s\" (%s)\n",
+ fmt, d, buf, expected[0], expected[1], expected[2], expected[3],
+ mode_name);
+ return 1;
+ }
+}
+
static int
do_test (void)
{
@@ -103,6 +196,37 @@ do_test (void)
}
#endif
}
+
+ for (size_t i = 0; i < sizeof (hex_tests) / sizeof (hex_tests[0]); i++)
+ {
+ result |= test_hex_in_one_mode (hex_tests[i].d, hex_tests[i].fmt,
+ hex_tests[i].rn, "default rounding mode");
+#ifdef FE_DOWNWARD
+ if (!fesetround (FE_DOWNWARD))
+ {
+ result |= test_hex_in_one_mode (hex_tests[i].d, hex_tests[i].fmt,
+ hex_tests[i].rd, "FE_DOWNWARD");
+ fesetround (save_round_mode);
+ }
+#endif
+#ifdef FE_TOWARDZERO
+ if (!fesetround (FE_TOWARDZERO))
+ {
+ result |= test_hex_in_one_mode (hex_tests[i].d, hex_tests[i].fmt,
+ hex_tests[i].rz, "FE_TOWARDZERO");
+ fesetround (save_round_mode);
+ }
+#endif
+#ifdef FE_UPWARD
+ if (!fesetround (FE_UPWARD))
+ {
+ result |= test_hex_in_one_mode (hex_tests[i].d, hex_tests[i].fmt,
+ hex_tests[i].ru, "FE_UPWARD");
+ fesetround (save_round_mode);
+ }
+#endif
+ }
+
return result;
}