perf c2c report: Add header macros

Adding helping macros to define header objects.  It will be used in
following patches, that add new dimensions.

The c2c report will support 2 line headers, hence we only define
line[0/1] in macros.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1474558645-19956-20-git-send-email-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-c2c.c

@@ -273,6 +273,41 @@ static int c2c_header(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 	return scnprintf(hpp->buf, hpp->size, "%*s", width, text);
 }
 
+#define HEADER_LOW(__h)			\
+	{				\
+		.line[1] = {		\
+			.text = __h,	\
+		},			\
+	}
+
+#define HEADER_BOTH(__h0, __h1)		\
+	{				\
+		.line[0] = {		\
+			.text = __h0,	\
+		},			\
+		.line[1] = {		\
+			.text = __h1,	\
+		},			\
+	}
+
+#define HEADER_SPAN(__h0, __h1, __s)	\
+	{				\
+		.line[0] = {		\
+			.text = __h0,	\
+			.span = __s,	\
+		},			\
+		.line[1] = {		\
+			.text = __h1,	\
+		},			\
+	}
+
+#define HEADER_SPAN_LOW(__h)		\
+	{				\
+		.line[1] = {		\
+			.text = __h,	\
+		},			\
+	}
+
 static struct c2c_dimension *dimensions[] = {
 	NULL,
 };