json: move json printer to common library

Move the json printer which is based on json writer into the
iproute2 library, so it can be used by library code and tools
other than ip. Should probably have been done from the beginning
like that given json writer is in the library already anyway.
No functional changes.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Julien Fortin <julien@cumulusnetworks.com>
diff --git a/include/json_print.h b/include/json_print.h
new file mode 100644
index 0000000..44cf5ac
--- /dev/null
+++ b/include/json_print.h
@@ -0,0 +1,71 @@
+/*
+ * json_print.h		"print regular or json output, based on json_writer".
+ *
+ *             This program is free software; you can redistribute it and/or
+ *             modify it under the terms of the GNU General Public License
+ *             as published by the Free Software Foundation; either version
+ *             2 of the License, or (at your option) any later version.
+ *
+ * Authors:    Julien Fortin, <julien@cumulusnetworks.com>
+ */
+
+#ifndef _JSON_PRINT_H_
+#define _JSON_PRINT_H_
+
+#include "json_writer.h"
+#include "color.h"
+
+json_writer_t *get_json_writer(void);
+
+/*
+ * use:
+ *      - PRINT_ANY for context based output
+ *      - PRINT_FP for non json specific output
+ *      - PRINT_JSON for json specific output
+ */
+enum output_type {
+	PRINT_FP = 1,
+	PRINT_JSON = 2,
+	PRINT_ANY = 4,
+};
+
+void new_json_obj(int json, FILE *fp);
+void delete_json_obj(void);
+
+bool is_json_context(void);
+
+void set_current_fp(FILE *fp);
+
+void fflush_fp(void);
+
+void open_json_object(const char *str);
+void close_json_object(void);
+void open_json_array(enum output_type type, const char *delim);
+void close_json_array(enum output_type type, const char *delim);
+
+#define _PRINT_FUNC(type_name, type)					\
+	void print_color_##type_name(enum output_type t,		\
+				     enum color_attr color,		\
+				     const char *key,			\
+				     const char *fmt,			\
+				     type value);			\
+									\
+	static inline void print_##type_name(enum output_type t,	\
+					     const char *key,		\
+					     const char *fmt,		\
+					     type value)		\
+	{								\
+		print_color_##type_name(t, -1, key, fmt, value);	\
+	}
+_PRINT_FUNC(int, int);
+_PRINT_FUNC(bool, bool);
+_PRINT_FUNC(null, const char*);
+_PRINT_FUNC(string, const char*);
+_PRINT_FUNC(uint, uint64_t);
+_PRINT_FUNC(hu, unsigned short);
+_PRINT_FUNC(hex, unsigned int);
+_PRINT_FUNC(0xhex, unsigned int);
+_PRINT_FUNC(lluint, unsigned long long int);
+#undef _PRINT_FUNC
+
+#endif /* _JSON_PRINT_H_ */
diff --git a/ip/Makefile b/ip/Makefile
index 52c9a2e..5a1c7ad 100644
--- a/ip/Makefile
+++ b/ip/Makefile
@@ -9,7 +9,7 @@
     link_iptnl.o link_gre6.o iplink_bond.o iplink_bond_slave.o iplink_hsr.o \
     iplink_bridge.o iplink_bridge_slave.o ipfou.o iplink_ipvlan.o \
     iplink_geneve.o iplink_vrf.o iproute_lwtunnel.o ipmacsec.o ipila.o \
-    ipvrf.o iplink_xstats.o ipseg6.o ip_print.o
+    ipvrf.o iplink_xstats.o ipseg6.o
 
 RTMONOBJ=rtmon.o
 
diff --git a/ip/ip_common.h b/ip/ip_common.h
index efc789c..4b8b0a7 100644
--- a/ip/ip_common.h
+++ b/ip/ip_common.h
@@ -1,3 +1,10 @@
+#ifndef _IP_COMMON_H_
+#define _IP_COMMON_H_
+
+#include <stdbool.h>
+
+#include "json_print.h"
+
 struct link_filter {
 	int ifindex;
 	int family;
@@ -101,8 +108,6 @@
 
 extern struct rtnl_handle rth;
 
-#include <stdbool.h>
-
 struct link_util {
 	struct link_util	*next;
 	const char		*id;
@@ -141,58 +146,4 @@
 
 void print_num(FILE *fp, unsigned int width, uint64_t count);
 
-#include "json_writer.h"
-
-json_writer_t   *get_json_writer(void);
-/*
- * use:
- *      - PRINT_ANY for context based output
- *      - PRINT_FP for non json specific output
- *      - PRINT_JSON for json specific output
- */
-enum output_type {
-	PRINT_FP = 1,
-	PRINT_JSON = 2,
-	PRINT_ANY = 4,
-};
-
-void new_json_obj(int json, FILE *fp);
-void delete_json_obj(void);
-
-bool is_json_context(void);
-
-void set_current_fp(FILE *fp);
-
-void fflush_fp(void);
-
-void open_json_object(const char *str);
-void close_json_object(void);
-void open_json_array(enum output_type type, const char *delim);
-void close_json_array(enum output_type type, const char *delim);
-
-#include "color.h"
-
-#define _PRINT_FUNC(type_name, type)					\
-	void print_color_##type_name(enum output_type t,		\
-				     enum color_attr color,		\
-				     const char *key,			\
-				     const char *fmt,			\
-				     type value);			\
-									\
-	static inline void print_##type_name(enum output_type t,	\
-					     const char *key,		\
-					     const char *fmt,		\
-					     type value)		\
-	{								\
-		print_color_##type_name(t, -1, key, fmt, value);	\
-	}
-_PRINT_FUNC(int, int);
-_PRINT_FUNC(bool, bool);
-_PRINT_FUNC(null, const char*);
-_PRINT_FUNC(string, const char*);
-_PRINT_FUNC(uint, uint64_t);
-_PRINT_FUNC(hu, unsigned short);
-_PRINT_FUNC(hex, unsigned int);
-_PRINT_FUNC(0xhex, unsigned int);
-_PRINT_FUNC(lluint, unsigned long long int);
-#undef _PRINT_FUNC
+#endif /* _IP_COMMON_H_ */
diff --git a/lib/Makefile b/lib/Makefile
index 5e9f72f..0fbdf4c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -3,7 +3,7 @@
 CFLAGS += -fPIC
 
 UTILOBJ = utils.o rt_names.o ll_types.o ll_proto.o ll_addr.o \
-	inet_proto.o namespace.o json_writer.o \
+	inet_proto.o namespace.o json_writer.o json_print.o \
 	names.o color.o bpf.o exec.o fs.o
 
 NLOBJ=libgenl.o ll_map.o libnetlink.o
diff --git a/ip/ip_print.c b/lib/json_print.c
similarity index 97%
rename from ip/ip_print.c
rename to lib/json_print.c
index 4cd6a0b..93b4119 100644
--- a/ip/ip_print.c
+++ b/lib/json_print.c
@@ -1,5 +1,5 @@
 /*
- * ip_print.c          "ip print regular or json output".
+ * json_print.c		"print regular or json output, based on json_writer".
  *
  *             This program is free software; you can redistribute it and/or
  *             modify it under the terms of the GNU General Public License
@@ -7,15 +7,13 @@
  *             2 of the License, or (at your option) any later version.
  *
  * Authors:    Julien Fortin, <julien@cumulusnetworks.com>
- *
  */
 
 #include <stdarg.h>
 #include <stdio.h>
 
 #include "utils.h"
-#include "ip_common.h"
-#include "json_writer.h"
+#include "json_print.h"
 
 static json_writer_t *_jw;
 static FILE *_fp;