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authorGravatar Guillaume Melquiond <guillaume.melquiond@inria.fr>2015-07-28 12:30:14 +0200
committerGravatar Guillaume Melquiond <guillaume.melquiond@inria.fr>2015-07-28 12:30:14 +0200
commit71b101172275a7c5872f6e8e70f9c0185f93f828 (patch)
tree3d31693af2a5f595b5a8f8cbab3438c3bb6cd18d /lib
parent6d8d39fd0a1c7dac1b6415660fd97fe3ad010ff7 (diff)
Use open_utf8_file_in for opening files in the IDE. (Fix bug #2874)
File system.ml seemed like a better choice than util.ml for sharing the code, but it was bringing a bunch of useless dependencies to the IDE. There are presumably several other tools that would benefit from using open_utf8_file_in instead of open_in, e.g. coqdoc.
Diffstat (limited to 'lib')
-rw-r--r--lib/util.ml11
-rw-r--r--lib/util.mli3
2 files changed, 14 insertions, 0 deletions
diff --git a/lib/util.ml b/lib/util.ml
index a8c25f745..a20dba0fc 100644
--- a/lib/util.ml
+++ b/lib/util.ml
@@ -132,3 +132,14 @@ let map_union f g = function
type iexn = Exninfo.iexn
let iraise = Exninfo.iraise
+
+let open_utf8_file_in fname =
+ let is_bom s =
+ Int.equal (Char.code s.[0]) 0xEF &&
+ Int.equal (Char.code s.[1]) 0xBB &&
+ Int.equal (Char.code s.[2]) 0xBF
+ in
+ let in_chan = open_in fname in
+ let s = " " in
+ if input in_chan s 0 3 < 3 || not (is_bom s) then seek_in in_chan 0;
+ in_chan
diff --git a/lib/util.mli b/lib/util.mli
index 4fce809c2..1dc405fcb 100644
--- a/lib/util.mli
+++ b/lib/util.mli
@@ -110,3 +110,6 @@ val map_union : ('a -> 'c) -> ('b -> 'd) -> ('a, 'b) union -> ('c, 'd) union
type 'a until = 'a CSig.until = Stop of 'a | Cont of 'a
(** Used for browsable-until structures. *)
+
+val open_utf8_file_in : string -> in_channel
+(** Open an utf-8 encoded file and skip the byte-order mark if any. *)