msvcr120: Set errno in log2.

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com> Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

msvcr120: Set errno in log2.
b1230c34 · Alex Henrie · Alexandre Julliard · 31b835d0 · b1230c34
Commit b1230c34 authored Jul 17, 2017 by Alex Henrie Committed by Alexandre Julliard Jul 18, 2017
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math.c dlls/msvcrt/math.c +4 -0

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--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -2488,6 +2488,8 @@ LDOUBLE CDECL MSVCR120_log1pl(LDOUBLE x)
 */
 double CDECL MSVCR120_log2(double x)
 {
+    if (x < 0) *MSVCRT__errno() = MSVCRT_EDOM;
+    else if (x == 0) *MSVCRT__errno() = MSVCRT_ERANGE;
 #ifdef HAVE_LOG2
    return log2(x);
 #else
@@ -2500,6 +2502,8 @@ double CDECL MSVCR120_log2(double x)
 */
 float CDECL MSVCR120_log2f(float x)
 {
+    if (x < 0) *MSVCRT__errno() = MSVCRT_EDOM;
+    else if (x == 0) *MSVCRT__errno() = MSVCRT_ERANGE;
 #ifdef HAVE_LOG2F
    return log2f(x);
 #else