test fenv functions with bad arguments

diff --git a/src/math/fenv.c b/src/math/fenv.c
index e15f0bc..8a2c78e 100644 (file)
--- a/src/math/fenv.c
+++ b/src/math/fenv.c
@@ -37,6 +37,7 @@ static struct {
 #ifdef FE_UNDERFLOW
        F(FE_UNDERFLOW),
 #endif
+       {0, 0}
 };
 
 static void test_except()
@@ -45,7 +46,7 @@ static void test_except()
        int i,r;
        fenv_t env;
 
-       for (i=0; i < sizeof te/sizeof*te; i++) {
+       for (i=0; te[i].i; i++) {
                feclearexcept(FE_ALL_EXCEPT);
 
                r = feraiseexcept(te[i].i);
@@ -57,10 +58,15 @@ static void test_except()
                                te[i].name, te[i].i, r);
        }
 
+       r = feraiseexcept(FE_ALL_EXCEPT);
+       if (r != 0)
+               error("feraisexcept(FE_ALL_EXCEPT) failed\n");
        r = fegetenv(&env);
        if (r != 0)
                error("fegetenv(&env) = %d\n", r);
-       i = fetestexcept(FE_ALL_EXCEPT);
+       r = fetestexcept(FE_ALL_EXCEPT);
+       if (r != FE_ALL_EXCEPT)
+               error("fetestexcept failed: got 0x%x, want 0x%x (FE_ALL_ECXEPT)\n", r, FE_ALL_EXCEPT);
        r = fesetenv(FE_DFL_ENV);
        if (r != 0)
                error("fesetenv(FE_DFL_ENV) = %d\n", r);
@@ -71,7 +77,7 @@ static void test_except()
        if (r != 0)
                error("fesetenv(&env) = %d\n", r);
        r = fetestexcept(FE_ALL_EXCEPT);
-       if (r != i)
+       if (r != FE_ALL_EXCEPT)
                error("fesetenv(&env) did not restore exceptions: 0x%x\n", r);
 }
 
@@ -200,10 +206,39 @@ static void test_round_add(void)
        }
 }
 
+static void test_bad(void)
+{
+       fexcept_t f;
+       int r;
+
+       r = fetestexcept(1234567);
+       if (r == 0)
+               error("fetestexcept should return non-zero on non-supported exceptions\n");
+       r = feraiseexcept(1234567);
+       if (r == 0)
+               error("feraiseexcept should return non-zero on non-supported exceptions\n");
+       r = feclearexcept(1234567);
+       if (r == 0)
+               error("feclearexcept should return non-zero on non-supported exceptions\n");
+       r = fesetround(1234567);
+       if (r == 0)
+               error("fesetround should fail on invalid rounding mode\n");
+       r = fegetexceptflag(&f, 1234567);
+       if (r == 0)
+               error("fegetexceptflag should return non-zero on non-supported exceptions\n");
+       r = fegetexceptflag(&f, 0);
+       if (r != 0)
+               error("fegetexceptflag(0) failed\n");
+       r = fesetexceptflag(&f, 1234567);
+       if (r == 0)
+               error("fesetexceptflag should return non-zero on non-supported exceptions\n");
+}
+
 int main(void)
 {
        test_except();
        test_round();
        test_round_add();
+       test_bad();
        return test_status;
 }