Updates

src/drivers/libretro/libretro-common/include/compat/msvc.h

@@ -35,12 +35,12 @@ extern "C"  {
    #ifndef snprintf
       #define snprintf c99_snprintf_retro__
    #endif
-   
+
    int c99_snprintf_retro__(char *outBuf, size_t size, const char *format, ...);
 #endif
 
 /* Pre-MSVC 2010 compilers don't implement vsnprintf in a cross-platform manner? Not sure about this one. */
-#if _MSC_VER < 1600 
+#if _MSC_VER < 1600
    #include <stdarg.h>
    #include <stdlib.h>
    #ifndef vsnprintf
@@ -86,9 +86,33 @@ typedef int ssize_t;
 #pragma warning(disable : 4723)
 #pragma warning(disable : 4996)
 
-/* roundf is available since MSVC 2013 */
+/* roundf and va_copy is available since MSVC 2013 */
 #if _MSC_VER < 1800
 #define roundf(in) (in >= 0.0f ? floorf(in + 0.5f) : ceilf(in - 0.5f))
+#define va_copy(x, y) ((x) = (y))
+#endif
+
+#if _MSC_VER <= 1310
+   #ifndef __cplusplus
+      /* VC6 math.h doesn't define some functions when in C mode.
+       * Trying to define a prototype gives "undefined reference".
+       * But providing an implementation then gives "function already has body".
+       * So the equivalent of the implementations from math.h are used as
+       * defines here instead, and it seems to work.
+       */
+      #define cosf(x) ((float)cos((double)x))
+      #define powf(x, y) ((float)pow((double)x, (double)y))
+      #define sinf(x) ((float)sin((double)x))
+      #define ceilf(x) ((float)ceil((double)x))
+      #define floorf(x) ((float)floor((double)x))
+      #define sqrtf(x) ((float)sqrt((double)x))
+      #define fabsf(x)    ((float)fabs((double)(x)))
+   #endif
+
+   #ifndef _strtoui64
+      #define _strtoui64(x, y, z) (_atoi64(x))
+   #endif
+
 #endif
 
 #ifndef PATH_MAX

src/drivers/libretro/libretro-common/include/compat/msvc/stdint.h

@@ -1,5 +1,5 @@
 /* ISO C9x  compliant stdint.h for Microsoft Visual Studio
- * Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124 
+ * Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124
  *
  * Copyright (c) 2006-2008 Alexander Chemeris
  *
@@ -22,7 +22,7 @@
  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@@ -47,11 +47,11 @@
  * error C2733: second C linkage of overloaded function 'wmemchr' not allowed
  */
 #ifdef __cplusplus
-#if _MSC_VER <= 1200
-extern "C++" {
-#else
-extern "C" {
-#endif
+#if _MSC_VER <= 1200
+extern "C++" {
+#else
+extern "C" {
+#endif
 #endif
 #  include <wchar.h>
 #ifdef __cplusplus
@@ -216,7 +216,7 @@ typedef uint64_t  uintmax_t;
 #ifndef WCHAR_MIN /* [ */
 #  define WCHAR_MIN  0
 #endif  /* WCHAR_MIN ] */
-#ifndef WCHAR_MAX /* [ */
+#ifndef WCHAR_MAX // [
 #  define WCHAR_MAX  _UI16_MAX
 #endif  /* WCHAR_MAX ] */