json: Add extern "C" { ... } to headers.

This makes it easier for external C++ projects to import the header.

CC: Jeremy Stribling <strib@nicira.com>

diff --git a/lib/json.h b/lib/json.h
index 41257b0d7e610fe3da88e042f917aa7e266557c4..5c32c06cd42f166ef58aae3b031dd9558604742b 100644 (file)
--- a/lib/json.h
+++ b/lib/json.h
@@ -32,6 +32,10 @@
 
 #include "shash.h"
 
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
 struct ds;
 
 /* Type of a JSON value. */
@@ -128,4 +132,8 @@ void json_to_ds(const struct json *, int flags, struct ds *);
 
 bool json_string_unescape(const char *in, size_t in_len, char **outp);
 
+#ifdef  __cplusplus
+}
+#endif
+
 #endif /* json.h */