Added json_stdbool.h following similar pattern to json_inttypes.h to provide <stdbool.h> support wherever it is missing.

json_config.h.in

@@ -1,3 +1,5 @@
+/* Define to 1 if you have the <stdbool.h> header file. */
+#undef JSON_C_HAVE_STDBOOL_H
 
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef JSON_C_HAVE_INTTYPES_H

json_object_iterator.c

@@ -16,13 +16,11 @@
 */
 
 #include <stddef.h>
-#include <stdbool.h>
 
 #include "json.h"
 #include "json_object_private.h"
-
 #include "json_object_iterator.h"
-
+#include "json_stdbool.h"
 /**
  * How It Works
  * 

json_object_iterator.h

@@ -29,7 +29,8 @@
 #define JSON_OBJECT_ITERATOR_H
 
 #include <stddef.h>
-#include <stdbool.h>
+
+#include "json_stdbool.h"
 
 #ifdef __cplusplus 
 extern "C" {

json_stdbool.h

@@ -0,0 +1,33 @@
+#ifndef _json_stdbool_h_
+#define _json_stdbool_h_
+
+#include "json_config.h"
+
+#ifndef __cplusplus
+#if defined(_MSC_VER)
+
+/* The C language implementation does not provide the standard header
+ * file "stdbool.h" as required by ISO/IEC 9899:1999.
+ */
+#if !defined(bool)
+#define	bool	int
+#endif
+
+#if !defined(true)
+#define true	1
+#endif
+
+#if !defined(false)
+#define	false	0
+#endif
+
+#else /* ndef _MSC_VER */
+
+#ifdef JSON_C_HAVE_STDBOOL_H
+#include <stdbool.h>
+#endif
+
+#endif /* _MSC_VER */
+#endif /* __cplusplus */
+
+#endif /* _json_stdbool_h_ */