flockfile list corruption test

[libc-test] / src / regression / fpclassify-invalid-ld80.c

diff --git a/src/regression/fpclassify-invalid-ld80.c b/src/regression/fpclassify-invalid-ld80.c
index b97fe9c..fe8eeb5 100644 (file)
--- a/src/regression/fpclassify-invalid-ld80.c
+++ b/src/regression/fpclassify-invalid-ld80.c
@@ -1,8 +1,11 @@
 // commit: f657fe4b9f734d7fdea515af8dffbf7c28ce4fbc 2013-09-05
 // classify invalid x86 ld80 representations (this is ub, we follow the fpu)
+// test printf("%La") as well
 #include <math.h>
 #include <float.h>
 #include <stdint.h>
+#include <stdio.h>
+#include <string.h>
 #include "test.h"
 
 #if LDBL_MANT_DIG==64
@@ -19,8 +22,15 @@ static char *strclass(int c)
        return "invalid";
 }
 
-#define T(desc,got,want) do{ \
-if (got!=want) t_error("fpclassify(%s) failed: got %s want %s\n", desc, strclass(got), #want); \
+#define T(f, desc, c, cwant, s, swant) do{ \
+       c = fpclassify(f); \
+       if (c != cwant) \
+               t_error("fpclassify(%s) failed: got %s want %s\n", desc, strclass(c), #cwant); \
+       memset(s, 0, sizeof(s)); \
+       if (snprintf(s, sizeof(s), "%La", f) >= sizeof(s)) \
+               t_error("snprintf(\"%%La\", %s) failed with invalid return value\n", desc); \
+       if (strcmp(s,swant) != 0) \
+               t_error("snprintf(\"%%La\", %s) failed: got \"%.*s\" want %s\n", desc, sizeof(s), s, #swant); \
 }while(0)
 
 int main(void)
@@ -33,26 +43,23 @@ int main(void)
                } i;
        } u;
        int c;
+       int r;
+       char s[32];
 
        u.f = 0;
        u.i.m = (uint64_t)1<<63;
-       c = fpclassify(u.f);
-       T("zero with msb set", c, FP_NORMAL);
+       T(u.f, "zero with msb set", c, FP_NORMAL, s, "0x1p-16382");
        u.i.m++;
-       c = fpclassify(u.f);
-       T("subnormal with msb set", c, FP_NORMAL);
+       T(u.f, "subnormal with msb set", c, FP_NORMAL, s, "0x1.0000000000000002p-16382");
        u.f=1;
        u.i.m=0;
-       c = fpclassify(u.f);
-       T("normal with msb unset", c, FP_NAN);
+       T(u.f, "normal with msb unset", c, FP_NAN, s, "nan");
        u.f=INFINITY;
        u.i.m=0;
-       c = fpclassify(u.f);
-       T("infinity with msb unset", c, FP_NAN);
+       T(u.f, "infinity with msb unset", c, FP_NAN, s, "nan");
        u.f=NAN;
        u.i.m&=(uint64_t)-1/2;
-       c = fpclassify(u.f);
-       T("nan with msb unset", c, FP_NAN);
+       T(u.f, "nan with msb unset", c, FP_NAN, s, "nan");
        return t_status;
 }
 #else