[PATCH 3/6] commands: iomem: print human readable sizes by default

[Ahmad Fatoum <a.fatoum@barebox.org>]

We already print start and end in hexadecimal, so print a size of e.g.,
905.6 KiB doesn't lose any information when copy-pasting, but makes it
easier for quick sanity checks.

The newly introduced -v flag can be used to restore the old behavior.
For I/O ports, printing a size in bytes doesn't make sense, so we
exclude it via the FLAG_IOPORT flag.

Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
 commands/iomemport.c | 51 +++++++++++++++++++++++++++++++++++++-------
 1 file changed, 43 insertions(+), 8 deletions(-)

diff --git a/commands/iomemport.c b/commands/iomemport.c
index bbe41f571b48..2246868c2818 100644
--- a/commands/iomemport.c
+++ b/commands/iomemport.c
@@ -6,9 +6,17 @@
 #include <asm/io.h>
 #include <common.h>
 #include <command.h>
+#include <getopt.h>
+#include <range.h>
 
-static void __print_resources(struct resource *res, int indent)
+#define	FLAG_VERBOSE		BIT(0)
+#define	FLAG_IOPORT		BIT(1)
+
+static void __print_resources(struct resource *res, int indent,
+			      unsigned flags)
 {
+	const char *size_str;
+	char buf[64];
 	struct resource *r;
 	resource_size_t size = resource_size(res);
 	int i;
@@ -16,24 +24,50 @@ static void __print_resources(struct resource *res, int indent)
 	for (i = 0; i < indent; i++)
 		printf("  ");
 
-	printf("%pa - %pa (size %pa) %s%s\n",
-			&res->start, &res->end, &size,
+	if (flags & (FLAG_VERBOSE | FLAG_IOPORT)) {
+		snprintf(buf, sizeof(buf), "%pa", &size);
+		size_str = buf;
+	} else {
+		size_str = size_human_readable(size);
+	}
+
+	printf("%pa - %pa (size %9s) %s%s\n",
+			&res->start, &res->end, size_str,
 			is_reserved_resource(res) ? "[R] " : "",
 			res->name);
 
 	list_for_each_entry(r, &res->children, sibling) {
-		__print_resources(r, indent + 1);
+		__print_resources(r, indent + 1, flags);
 	}
 }
 
-static void print_resources(struct resource *res)
+static void print_resources(struct resource *res, unsigned flags)
 {
-	__print_resources(res, 0);
+	__print_resources(res, 0, flags);
 }
 
 static int do_iomem(int argc, char *argv[])
 {
-	print_resources(&iomem_resource);
+	unsigned flags = 0;
+	int opt;
+
+	while((opt = getopt(argc, argv, "v")) > 0) {
+		switch(opt) {
+		case 'v':
+			flags |= FLAG_VERBOSE;
+			break;
+		default:
+			return COMMAND_ERROR_USAGE;
+		}
+	}
+
+	argv += optind;
+	argc -= optind;
+
+	if (argc > 0)
+		return COMMAND_ERROR_USAGE;
+
+	print_resources(&iomem_resource, flags);
 
 	return 0;
 }
@@ -41,13 +75,14 @@ static int do_iomem(int argc, char *argv[])
 BAREBOX_CMD_START(iomem)
 	.cmd		= do_iomem,
 	BAREBOX_CMD_DESC("show IO memory usage")
+	BAREBOX_CMD_OPTS("[-v]")
 	BAREBOX_CMD_GROUP(CMD_GRP_INFO)
 BAREBOX_CMD_END
 
 #if IO_SPACE_LIMIT > 0
 static int do_ioport(int argc, char *argv[])
 {
-	print_resources(&ioport_resource);
+	print_resources(&ioport_resource, FLAG_IOPORT);
 
 	return 0;
 }
-- 
2.39.5