Use the proper snprintf function if compiling with VS2015.

Proper snprintf is finally supported as of the latest Visual Studio,
and has better semantics for my purposes than the old MS-specific
_snprintf. (Specifically, if its output doesn't fit the buffer, it
returns the full size it _would_ have wanted, so that you can then
immediately allocate that much space, and don't have to keep going
round a loop increasing the buffer size until you find the answer.)

diff --git a/misc.c b/misc.c
index 0ce3d366824c24c472922eb681dbf1e12412aa4f..5ff403d6b495f60ef9f8a7daf7a7075ef28b5693 100644 (file)
--- a/misc.c
+++ b/misc.c
@@ -412,7 +412,7 @@ char *dupvprintf(const char *fmt, va_list ap)
     size = 512;
 
     while (1) {
-#ifdef _WINDOWS
+#if defined _WINDOWS && _MSC_VER < 1900 /* 1900 == VS2015 has real snprintf */
 #define vsnprintf _vsnprintf
 #endif
 #ifdef va_copy