parse-options: move unsigned long option parsing out of pack-objects.ccb/parse-magnitude

The unsigned long option parsing (including 'k'/'m'/'g' suffix
parsing) is more widely applicable.  Add support for OPT_MAGNITUDE
to parse-options.h and change pack-objects.c use this support.

The error behavior on parse errors follows that of OPT_INTEGER.  The
name of the option that failed to parse is reported with a brief
message describing the expect format for the option argument and
then the full usage message for the command invoked.

This differs from the previous behavior for OPT_ULONG used in
pack-objects for --max-pack-size and --window-memory which used to
display the value supplied in the error message and did not display
the full usage message.

Signed-off-by: Charles Bailey <cbailey32@bloomberg.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/test-parse-options.c b/test-parse-options.c
index 7c492cf724..2c8c8f18ed 100644
--- a/test-parse-options.c
+++ b/test-parse-options.c
@@ -4,6 +4,7 @@
 
 static int boolean = 0;
 static int integer = 0;
+static unsigned long magnitude = 0;
 static unsigned long timestamp;
 static int abbrev = 7;
 static int verbose = 0, dry_run = 0, quiet = 0;
@@ -48,6 +49,7 @@ int main(int argc, char **argv)
 		OPT_GROUP(""),
 		OPT_INTEGER('i', "integer", &integer, "get a integer"),
 		OPT_INTEGER('j', NULL, &integer, "get a integer, too"),
+		OPT_MAGNITUDE('m', "magnitude", &magnitude, "get a magnitude"),
 		OPT_SET_INT(0, "set23", &integer, "set integer to 23", 23),
 		OPT_DATE('t', NULL, &timestamp, "get timestamp of <time>"),
 		OPT_CALLBACK('L', "length", &integer, "str",
@@ -83,6 +85,7 @@ int main(int argc, char **argv)
 
 	printf("boolean: %d\n", boolean);
 	printf("integer: %d\n", integer);
+	printf("magnitude: %lu\n", magnitude);
 	printf("timestamp: %lu\n", timestamp);
 	printf("string: %s\n", string ? string : "(not set)");
 	printf("abbrev: %d\n", abbrev);