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authorLudovic Courtès <ludo@gnu.org>2017-08-19 23:55:10 +0200
committerLudovic Courtès <ludo@gnu.org>2017-09-11 22:24:46 +0200
commita8e1247d7d758a0c32d54f8277f40a05711555b8 (patch)
treeabcf9fb87859eaae954d792c7de651a3644791ae /gnu/build
parentbae28ccb69d67f0e988a49046ffa29d201d77a74 (diff)
file-systems: Add UUID type dictionaries.
* gnu/build/file-systems.scm (uuid->string): Rename to... (dce-uuid->string): ... this. (string->uuid): Rename to... (string->dce-uuid): ... this. (vhashq): New macro. (%uuid-parsers, %uuid-printers): New variables. (uuid->string, string->uuid): New procedures.
Diffstat (limited to 'gnu/build')
-rw-r--r--gnu/build/file-systems.scm49
1 files changed, 43 insertions, 6 deletions
diff --git a/gnu/build/file-systems.scm b/gnu/build/file-systems.scm
index 203fbdfffb..fbaf158951 100644
--- a/gnu/build/file-systems.scm
+++ b/gnu/build/file-systems.scm
@@ -28,6 +28,7 @@
#:use-module (ice-9 rdelim)
#:use-module (ice-9 format)
#:use-module (ice-9 regex)
+ #:use-module (ice-9 vlist)
#:use-module (system foreign)
#:autoload (system repl repl) (start-repl)
#:use-module (srfi srfi-1)
@@ -42,7 +43,9 @@
canonicalize-device-spec
uuid->string
+ dce-uuid->string
string->uuid
+ string->dce-uuid
string->iso9660-uuid
string->ext2-uuid
string->ext3-uuid
@@ -516,7 +519,7 @@ were found."
(define-syntax %network-byte-order
(identifier-syntax (endianness big)))
-(define (uuid->string uuid)
+(define (dce-uuid->string uuid)
"Convert UUID, a 16-byte bytevector, to its string representation, something
like \"6b700d61-5550-48a1-874c-a3d86998990e\"."
;; See <https://tools.ietf.org/html/rfc4122>.
@@ -532,7 +535,7 @@ like \"6b700d61-5550-48a1-874c-a3d86998990e\"."
;; The regexp of a UUID.
(make-regexp "^([[:xdigit:]]{8})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{12})$"))
-(define (string->uuid str)
+(define (string->dce-uuid str)
"Parse STR as a DCE UUID (see <https://tools.ietf.org/html/rfc4122>) and
return its contents as a 16-byte bytevector. Return #f if STR is not a valid
UUID representation."
@@ -562,10 +565,44 @@ UUID representation."
(time-low 4) (time-mid 2) (time-hi 2)
(clock-seq 2) (node 6)))))))
-(define string->ext2-uuid string->uuid)
-(define string->ext3-uuid string->uuid)
-(define string->ext4-uuid string->uuid)
-(define string->btrfs-uuid string->uuid)
+(define string->ext2-uuid string->dce-uuid)
+(define string->ext3-uuid string->dce-uuid)
+(define string->ext4-uuid string->dce-uuid)
+(define string->btrfs-uuid string->dce-uuid)
+
+(define-syntax vhashq
+ (syntax-rules (=>)
+ ((_)
+ vlist-null)
+ ((_ (key others ... => value) rest ...)
+ (vhash-consq key value
+ (vhashq (others ... => value) rest ...)))
+ ((_ (=> value) rest ...)
+ (vhashq rest ...))))
+
+(define %uuid-parsers
+ (vhashq
+ ('dce 'ext2 'ext3 'ext4 'btrfs 'luks => string->dce-uuid)
+ ('iso9660 => string->iso9660-uuid)))
+
+(define %uuid-printers
+ (vhashq
+ ('dce 'ext2 'ext3 'ext4 'btrfs 'luks => dce-uuid->string)
+ ('iso9660 => iso9660-uuid->string)
+ ('fat32 'fat => fat32-uuid->string)))
+
+(define* (string->uuid str #:key (type 'dce))
+ "Parse STR as a UUID of the given TYPE. On success, return the
+corresponding bytevector; otherwise return #f."
+ (match (vhash-assq type %uuid-parsers)
+ (#f #f)
+ ((_ . (? procedure? parse)) (parse str))))
+
+(define* (uuid->string bv #:key (type 'dce))
+ "Convert BV, a bytevector, to the UUID string representation for TYPE."
+ (match (vhash-assq type %uuid-printers)
+ (#f #f)
+ ((_ . (? procedure? unparse)) (unparse bv))))
(define* (canonicalize-device-spec spec #:optional (title 'any))