printf %g regression tests

[libc-test] / src / regression / printf-fmt-g-zeros.c

diff --git a/src/regression/printf-fmt-g-zeros.c b/src/regression/printf-fmt-g-zeros.c
new file mode 100644 (file)
index 0000000..2b08691
--- /dev/null
+++ b/src/regression/printf-fmt-g-zeros.c
@@ -0,0 +1,21 @@
+// commit 89740868c9f1c84b8ee528468d12df1fa72cd392 2014-04-07
+// %g should not print trailing zeros
+#include <stdio.h>
+#include <string.h>
+#include "test.h"
+
+static void t(const char *fmt, double d, const char *want)
+{
+       char buf[256];
+       int n = strlen(want);
+       int r = snprintf(buf, sizeof buf, fmt, d);
+       if (r != n || memcmp(buf, want, n+1) != 0)
+               t_error("snprintf(\"%s\",%f) want %s got %s\n", fmt, d, want, buf);
+}
+
+int main()
+{
+       t("%.50g", 100000000000000.5, "100000000000000.5");
+       t("%.50g", 987654321098765.0, "987654321098765");
+       return t_status;
+}