feature: supports MS C compiler older than VC2012.

Signed-off-by: Yichun Zhang (agentzh) <agentzh@gmail.com>

2 files changed, 11 insertions, 1 deletions

diff --git a/lua-cjson-2.1devel-1.rockspec b/lua-cjson-2.1devel-1.rockspec
index 154e333..d614d05 100644
--- a/lua-cjson-2.1devel-1.rockspec
+++ b/lua-cjson-2.1devel-1.rockspec
@@ -47,7 +47,7 @@ build = {
     -- Override default build options (per platform)
     platforms = {
         win32 = { modules = { cjson = { defines = {
-            "DISABLE_INVALID_NUMBERS"
+            "DISABLE_INVALID_NUMBERS", "USE_INTERNAL_ISINF"
         } } } }
     },
     copy_directories = { "tests" }
diff --git a/lua_cjson.c b/lua_cjson.c
index 1695979..89cba6d 100644
--- a/lua_cjson.c
+++ b/lua_cjson.c
@@ -54,6 +54,16 @@
 #define CJSON_VERSION   "2.1devel"
 #endif
 
+#ifdef _MSC_VER
+#define snprintf sprintf_s
+
+#ifndef isnan
+#include <float.h>
+#define isnan(x) _isnan(x)
+#endif
+
+#endif
+
 /* Workaround for Solaris platforms missing isinf() */
 #if !defined(isinf) && (defined(USE_INTERNAL_ISINF) || defined(MISSING_ISINF))
 #define isinf(x) (!isnan(x) && isnan((x) - (x)))