add remaining tests from libc-testsuit

[libc-test] / src / stdlib / strtod.c

diff --git a/src/stdlib/strtod.c b/src/stdlib/strtod.c
new file mode 100644 (file)
index 0000000..a4a8b53
--- /dev/null
+++ b/src/stdlib/strtod.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include "test.h"
+
+/* r = place to store result
+ * f = function call to test (or any expression)
+ * x = expected result
+ * m = message to print on failure (with formats for r & x)
+**/
+
+#define TEST(r, f, x, m) ( \
+       ((r) = (f)) == (x) || \
+       (error("%s failed (" m ")\n", #f, r, x, r-x), 0) )
+
+void test_strtod(void) {
+       int i;
+       double d, d2;
+       char buf[1000];
+
+       for (i=0; i<100; i++) {
+               d = sin(i);
+               snprintf(buf, sizeof buf, "%.300f", d);
+               TEST(d2, strtod(buf, 0), d, "round trip fail %a != %a (%a)");
+       }
+
+       TEST(d, strtod("0x1p4", 0), 16.0, "hex float %a != %a");
+       TEST(d, strtod("0x1.1p4", 0), 17.0, "hex float %a != %a");
+}