mkimage: Display a better list of available image types

Offer to display the available image types in help. Also, rather than
hacking the genimg_get_type_id() function to display a list of types,
do this in the tool. Also, sort the list.

The list of image types is quite long, and hard to discover. Print it out
when we show help information.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 52 insertions, 7 deletions

diff --git a/tools/mkimage.c b/tools/mkimage.c
index 5ccd951..8808d70 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -26,8 +26,48 @@ struct image_tool_params params = {
 	.imagename2 = "",
 };
 
-int
-main (int argc, char **argv)
+static int h_compare_image_name(const void *vtype1, const void *vtype2)
+{
+	const int *type1 = vtype1;
+	const int *type2 = vtype2;
+	const char *name1 = genimg_get_type_short_name(*type1);
+	const char *name2 = genimg_get_type_short_name(*type2);
+
+	return strcmp(name1, name2);
+}
+
+/* Show all image types supported by mkimage */
+static void show_image_types(void)
+{
+	struct image_type_params *tparams;
+	int order[IH_TYPE_COUNT];
+	int count;
+	int type;
+	int i;
+
+	/* Sort the names in order of short name for easier reading */
+	memset(order, '\0', sizeof(order));
+	for (count = 0, type = 0; type < IH_TYPE_COUNT; type++) {
+		tparams = imagetool_get_type(type);
+		if (tparams)
+			order[count++] = type;
+	}
+	qsort(order, count, sizeof(int), h_compare_image_name);
+
+	fprintf(stderr, "\nInvalid image type. Supported image types:\n");
+	for (i = 0; i < count; i++) {
+		type = order[i];
+		tparams = imagetool_get_type(type);
+		if (tparams) {
+			fprintf(stderr, "\t%-15s  %s\n",
+				genimg_get_type_short_name(type),
+				genimg_get_type_name(type));
+		}
+	}
+	fprintf(stderr, "\n");
+}
+
+int main(int argc, char **argv)
 {
 	int ifd = -1;
 	struct stat sbuf;
@@ -75,12 +115,16 @@ main (int argc, char **argv)
 					usage ();
 				goto NXTARG;
 			case 'T':
-				if ((--argc <= 0) ||
-					(params.type =
-					genimg_get_type_id (*++argv)) < 0)
-					usage ();
+				params.type = -1;
+				if (--argc >= 0 && argv[1]) {
+					params.type =
+						genimg_get_type_id(*++argv);
+				}
+				if (params.type < 0) {
+					show_image_types();
+					usage();
+				}
 				goto NXTARG;
-
 			case 'a':
 				if (--argc <= 0)
 					usage ();
@@ -546,6 +590,7 @@ static void usage(void)
 #endif
 	fprintf (stderr, "       %s -V ==> print version information and exit\n",
 		params.cmdname);
+	fprintf(stderr, "Use -T to see a list of available image types\n");
 
 	exit (EXIT_FAILURE);
 }