tree-wide: always declare bitflag enums the same way

let's always use the 1 << x syntax. No change of behaviour or even of
the compiled binary.

src/basic/btrfs-util.h

@@ -28,17 +28,17 @@ typedef struct BtrfsQuotaInfo {
 } BtrfsQuotaInfo;
 
 typedef enum BtrfsSnapshotFlags {
-        BTRFS_SNAPSHOT_FALLBACK_COPY = 1,        /* If the source isn't a subvolume, reflink everything */
-        BTRFS_SNAPSHOT_READ_ONLY = 2,
-        BTRFS_SNAPSHOT_RECURSIVE = 4,
-        BTRFS_SNAPSHOT_QUOTA = 8,
-        BTRFS_SNAPSHOT_FALLBACK_DIRECTORY = 16,  /* If the destination doesn't support subvolumes, reflink/copy instead */
-        BTRFS_SNAPSHOT_FALLBACK_IMMUTABLE = 32,  /* When we can't create a subvolume, use the FS_IMMUTABLE attribute for indicating read-only */
+        BTRFS_SNAPSHOT_FALLBACK_COPY      = 1 << 0, /* If the source isn't a subvolume, reflink everything */
+        BTRFS_SNAPSHOT_READ_ONLY          = 1 << 1,
+        BTRFS_SNAPSHOT_RECURSIVE          = 1 << 2,
+        BTRFS_SNAPSHOT_QUOTA              = 1 << 3,
+        BTRFS_SNAPSHOT_FALLBACK_DIRECTORY = 1 << 4, /* If the destination doesn't support subvolumes, reflink/copy instead */
+        BTRFS_SNAPSHOT_FALLBACK_IMMUTABLE = 1 << 5, /* When we can't create a subvolume, use the FS_IMMUTABLE attribute for indicating read-only */
 } BtrfsSnapshotFlags;
 
 typedef enum BtrfsRemoveFlags {
-        BTRFS_REMOVE_RECURSIVE = 1,
-        BTRFS_REMOVE_QUOTA = 2,
+        BTRFS_REMOVE_RECURSIVE = 1 << 0,
+        BTRFS_REMOVE_QUOTA     = 1 << 1,
 } BtrfsRemoveFlags;
 
 int btrfs_is_filesystem(int fd);

src/basic/cgroup-util.h

@@ -162,9 +162,9 @@ int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d);
 int cg_read_subgroup(DIR *d, char **fn);
 
 typedef enum CGroupFlags {
-        CGROUP_SIGCONT     = 1,
-        CGROUP_IGNORE_SELF = 2,
-        CGROUP_REMOVE      = 4,
+        CGROUP_SIGCONT     = 1 << 0,
+        CGROUP_IGNORE_SELF = 1 << 1,
+        CGROUP_REMOVE      = 1 << 2,
 } CGroupFlags;
 
 typedef void (*cg_kill_log_func_t)(pid_t pid, int sig, void *userdata);

src/basic/extract-word.h

@@ -4,12 +4,12 @@
 #include "macro.h"
 
 typedef enum ExtractFlags {
-        EXTRACT_RELAX                    = 1,
-        EXTRACT_CUNESCAPE                = 2,
-        EXTRACT_CUNESCAPE_RELAX          = 4,
-        EXTRACT_QUOTES                   = 8,
-        EXTRACT_DONT_COALESCE_SEPARATORS = 16,
-        EXTRACT_RETAIN_ESCAPE            = 32,
+        EXTRACT_RELAX                    = 1 << 0,
+        EXTRACT_CUNESCAPE                = 1 << 1,
+        EXTRACT_CUNESCAPE_RELAX          = 1 << 2,
+        EXTRACT_QUOTES                   = 1 << 3,
+        EXTRACT_DONT_COALESCE_SEPARATORS = 1 << 4,
+        EXTRACT_RETAIN_ESCAPE            = 1 << 5,
 } ExtractFlags;
 
 int extract_first_word(const char **p, char **ret, const char *separators, ExtractFlags flags);

src/basic/unit-name.h

@@ -9,9 +9,9 @@
 #define UNIT_NAME_MAX 256
 
 typedef enum UnitNameFlags {
-        UNIT_NAME_PLAIN = 1,      /* Allow foo.service */
-        UNIT_NAME_INSTANCE = 2,   /* Allow foo@bar.service */
-        UNIT_NAME_TEMPLATE = 4,   /* Allow foo@.service */
+        UNIT_NAME_PLAIN    = 1 << 0, /* Allow foo.service */
+        UNIT_NAME_INSTANCE = 1 << 1, /* Allow foo@bar.service */
+        UNIT_NAME_TEMPLATE = 1 << 2, /* Allow foo@.service */
         UNIT_NAME_ANY = UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE,
 } UnitNameFlags;
 
@@ -50,8 +50,8 @@ int unit_name_from_path_instance(const char *prefix, const char *path, const cha
 int unit_name_to_path(const char *name, char **ret);
 
 typedef enum UnitNameMangle {
-        UNIT_NAME_MANGLE_GLOB = 1,
-        UNIT_NAME_MANGLE_WARN = 2,
+        UNIT_NAME_MANGLE_GLOB = 1 << 0,
+        UNIT_NAME_MANGLE_WARN = 1 << 1,
 } UnitNameMangle;
 
 int unit_name_mangle_with_suffix(const char *name, UnitNameMangle flags, const char *suffix, char **ret);