[PATCH v2 09/23] part: Add accessors for struct disk_partition type_uuid

[Simon Glass]

This field is only present when a CONFIG is set. To avoid annoying #ifdefs
in the source code, add accessors. Update all code to use it.

Note that the accessor is optional. It can be omitted if it is known that
the option is enabled.

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

(no changes since v1)

 disk/part.c     |  8 ++------
 disk/part_efi.c |  9 +++++----
 include/part.h  | 28 ++++++++++++++++++++++++++++
 3 files changed, 35 insertions(+), 10 deletions(-)

diff --git a/disk/part.c b/disk/part.c
index 91c6ac42cc83..72241b7b232c 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -370,9 +370,7 @@ int part_get_info_by_type(struct blk_desc *desc, int part, int part_type,
 	if (blk_enabled()) {
 		/* The common case is no UUID support */
 		disk_partition_clr_uuid(info);
-#ifdef CONFIG_PARTITION_TYPE_GUID
-		info->type_guid[0] = 0;
-#endif
+		disk_partition_clr_type_guid(info);
 
 		if (part_type == PART_TYPE_UNKNOWN) {
 			drv = part_driver_lookup_type(desc);
@@ -415,9 +413,7 @@ int part_get_info_whole_disk(struct blk_desc *desc,
 	strcpy((char *)info->type, BOOT_PART_TYPE);
 	strcpy((char *)info->name, "Whole Disk");
 	disk_partition_clr_uuid(info);
-#ifdef CONFIG_PARTITION_TYPE_GUID
-	info->type_guid[0] = 0;
-#endif
+	disk_partition_clr_type_guid(info);
 
 	return 0;
 }
diff --git a/disk/part_efi.c b/disk/part_efi.c
index a6f7375cd38a..208675213822 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -294,10 +294,11 @@ int part_get_info_efi(struct blk_desc *desc, int part,
 				(char *)disk_partition_uuid(info),
 				UUID_STR_FORMAT_GUID);
 	}
-#ifdef CONFIG_PARTITION_TYPE_GUID
-	uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
-			info->type_guid, UUID_STR_FORMAT_GUID);
-#endif
+	if (IS_ENABLED(CONFIG_PARTITION_TYPE_GUID)) {
+		uuid_bin_to_str(gpt_pte[part - 1].partition_type_guid.b,
+				(char *)disk_partition_type_uuid(info),
+				UUID_STR_FORMAT_GUID);
+	}
 
 	log_debug("start 0x" LBAF ", size 0x" LBAF ", name %s\n", info->start,
 		  info->size, info->name);
diff --git a/include/part.h b/include/part.h
index 8e5e543c56ec..5cf1c5ec96f0 100644
--- a/include/part.h
+++ b/include/part.h
@@ -107,6 +107,34 @@ static inline void disk_partition_clr_uuid(struct disk_partition *info)
 #endif
 }
 
+/* Accessors for struct disk_partition field ->type_guid */
+extern char *__invalid_use_of_disk_partition_type_uuid;
+
+static inline const
+char *disk_partition_type_uuid(const struct disk_partition *info)
+{
+#ifdef CONFIG_PARTITION_TYPE_GUID
+	return info->type_guid;
+#else
+	return __invalid_use_of_disk_partition_type_uuid;
+#endif
+}
+
+static inline void disk_partition_set_type_guid(struct disk_partition *info,
+						const char *val)
+{
+#ifdef CONFIG_PARTITION_TYPE_GUID
+	strlcpy(info->type_guid, val, UUID_STR_LEN + 1);
+#endif
+}
+
+static inline void disk_partition_clr_type_guid(struct disk_partition *info)
+{
+#ifdef CONFIG_PARTITION_TYPE_GUID
+	*info->type_guid = '\0';
+#endif
+}
+
 struct disk_part {
 	int partnum;
 	struct disk_partition gpt_part_info;
-- 
2.42.0.rc1.204.g551eb34607-goog