put everything back to one directory

[libc-test] / src / general / strtof.c

diff --git a/src/general/strtof.c b/src/general/strtof.c
new file mode 100644 (file)
index 0000000..29876bc
--- /dev/null
+++ b/src/general/strtof.c
@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "test.h"
+
+#define length(x) (sizeof(x) / sizeof *(x))
+
+static struct {
+       char *s;
+       float f;
+} t[] = {
+       // 2^-149 * 0.5 - eps
+       {".7006492321624085354618647916449580656401309709382578858785341419448955413429303e-45", 0},
+       // 2^-149 * 0.5 + eps
+       {".7006492321624085354618647916449580656401309709382578858785341419448955413429304e-45", 0x1p-149},
+       // 2^-149 * 0.5 - eps
+       {".2101947696487225606385594374934874196920392912814773657635602425834686624028790e-44", 0x1p-149},
+       // 2^-149 * 0.5 + eps
+       {".2101947696487225606385594374934874196920392912814773657635602425834686624028791e-44", 0x1p-148},
+       // 2^-126 + 2^-150 - eps
+       {".1175494420887210724209590083408724842314472120785184615334540294131831453944281e-37", 0x1p-126},
+       // 2^-126 + 2^-150 + eps
+       {".1175494420887210724209590083408724842314472120785184615334540294131831453944282e-37", 0x1.000002p-126},
+       // 2^128 - 2^103 - eps
+       {"340282356779733661637539395458142568447.9999999999999999999", 0x1.fffffep127},
+       // 2^128 - 2^103
+       {"340282356779733661637539395458142568448", INFINITY},
+};
+
+int main(void)
+{
+       int i;
+       float x;
+       char *p;
+
+       for (i = 0; i < length(t); i++) {
+               x = strtof(t[i].s, &p);
+               if (x != t[i].f)
+                       error("strtof(\"%s\") want %a got %a\n", t[i].s, t[i].f, x);
+       }
+       return test_status;
+}