fel: Introduce progress framework

This patch adds two new source files that will deal with code
related to progress callbacks and display. I have decided to
keep this separate, as there will be many smaller routines
involved, which otherwise would bloat fel.c unnecessarily.

For starters, let's also move the gettime() function there.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
Reviewed-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>

Makefile

@@ -83,7 +83,7 @@ LIBUSB = libusb-1.0
 LIBUSB_CFLAGS = `pkg-config --cflags $(LIBUSB)`
 LIBUSB_LIBS = `pkg-config --libs $(LIBUSB)`
 
-sunxi-fel: fel.c fel-to-spl-thunk.h
+sunxi-fel: fel.c fel-to-spl-thunk.h progress.c progress.h
 	$(CC) $(CFLAGS) $(LIBUSB_CFLAGS) $(LDFLAGS) -o $@ $(filter %.c,$^) $(LIBS) $(LIBUSB_LIBS)
 
 sunxi-nand-part: nand-part-main.c nand-part.c nand-part-a10.h nand-part-a20.h

fel.c

@@ -32,9 +32,9 @@
 #include <stdarg.h>
 #include <errno.h>
 #include <unistd.h>
-#include <sys/time.h>
 
 #include "endian_compat.h"
+#include "progress.h"
 
 struct  aw_usb_request {
 	char signature[8];
@@ -1186,14 +1186,6 @@ static int aw_fel_get_endpoint(libusb_device_handle *usb)
 	return 0;
 }
 
-/* Less reliable than clock_gettime, but does not require linking with -lrt */
-static double gettime(void)
-{
-	struct timeval tv;
-	gettimeofday(&tv, NULL);
-	return tv.tv_sec + (double)tv.tv_usec / 1000000.;
-}
-
 int main(int argc, char **argv)
 {
 	int rc;

progress.c

+/*
+ * Copyright (C) 2015  Bernhard Nortmann <bernhard.nortmann@web.de>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "progress.h"
+
+#include <stdio.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "common.h"
+
+/* Less reliable than clock_gettime, but does not require linking with -lrt */
+inline double gettime(void)
+{
+	struct timeval tv;
+	gettimeofday(&tv, NULL);
+	return tv.tv_sec + (double)tv.tv_usec / 1000000.;
+}
+
+/* Update progress status, passing information to the callback function. */
+void progress_update(size_t UNUSED(bytes_done))
+{
+	/*
+	 * This is a non-functional placeholder!
+	 * It will be replaced in a later patch.
+	 */
+}

progress.h

+/*
+ * Copyright (C) 2015  Bernhard Nortmann <bernhard.nortmann@web.de>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _SUNXI_TOOLS_PROGRESS_H
+#define _SUNXI_TOOLS_PROGRESS_H
+
+#include <stddef.h>
+
+/* function pointer type for a progress callback / notification */
+typedef void (*progress_cb_t)(size_t total, size_t done);
+
+/* conversion helper macros */
+#define kilo(value)	((double)(value) / 1000.) /* SI prefix "k" */
+#define kibi(value)	((double)(value) / 1024.) /* binary prefix "Ki", "K" */
+
+double gettime(void);
+
+void progress_update(size_t bytes_done);
+
+#endif /* _SUNXI_TOOLS_PROGRESS_H */