From d2d2adacecdca66bc9c138474f1362804c34a28d Mon Sep 17 00:00:00 2001
From: "S.J.R. van Schaik" <stephan@synkhronix.com>
Date: Tue, 12 Sep 2017 16:01:55 +0200
Subject: [PATCH] option: add function to format a list of short and long
 options together with their respective descriptions

---
 Makefile         |  1 +
 include/option.h |  9 +++++++++
 source/option.c  | 15 +++++++++++++++
 3 files changed, 25 insertions(+)
 create mode 100644 include/option.h
 create mode 100644 source/option.c

diff --git a/Makefile b/Makefile
index e83381d..22533c3 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,7 @@ obj-y += source/file.o
 obj-y += source/image.o
 obj-y += source/info.o
 obj-y += source/main.o
+obj-y += source/option.o
 obj-y += source/pack.o
 obj-y += source/sign.o
 obj-y += source/unpack.o
diff --git a/include/option.h b/include/option.h
new file mode 100644
index 0000000..59389a1
--- /dev/null
+++ b/include/option.h
@@ -0,0 +1,9 @@
+#pragma once
+
+struct opt_desc {
+	const char *short_name;
+	const char *long_name;
+	const char *desc;
+};
+
+void format_options(struct opt_desc *entries);
diff --git a/source/option.c b/source/option.c
new file mode 100644
index 0000000..2745eae
--- /dev/null
+++ b/source/option.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+#include <option.h>
+
+void format_options(struct opt_desc *entries)
+{
+	struct opt_desc *entry;
+
+	for (entry = entries; entry->long_name; ++entry) {
+		fprintf(stderr, "%7s %-16s %s\n",
+			entry->short_name ? entry->short_name : "",
+			entry->long_name,
+			entry->desc);
+	}
+}