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(* source.sml
*
* COPYRIGHT (c) 2012 The Fellowship of SML/NJ (http://www.smlnj.org)
* All rights reserved.
*)
structure Source : SOURCE =
struct
type inputSource = {
sourceMap: SourceMap.sourcemap,
fileOpened: string,
interactive: bool,
sourceStream: TextIO.instream,
content: string option ref,
anyErrors: bool ref,
errConsumer: PrettyPrintNew.device
}
(* -- inactive diagnostic printing
fun say (msg : string) = Control_Print.say msg
*)
fun newSource(fileName, sourceStream, interactive, errConsumer) =
{sourceMap=SourceMap.newSourceMap fileName,
fileOpened=fileName,
interactive=interactive,
sourceStream=sourceStream,
content=ref NONE,
anyErrors=ref false,
errConsumer=errConsumer}
fun closeSource ({interactive=true, ...} : inputSource) = ()
| closeSource ({sourceStream, ...}) = (
(* app say ["[closing ", (Pathnames.trim fileName), "]\n"];*)
TextIO.closeIn sourceStream handle IO.Io _ => ())
fun filepos ({sourceMap,...}: inputSource) pos = SourceMap.filepos sourceMap pos
fun getContent ({fileOpened,interactive,content,...}: inputSource) : string option =
case !content
of NONE =>
if interactive then NONE
(* need to capture history of interactive input *)
else (let val s = TextIO.inputAll(TextIO.openIn fileOpened)
in content := SOME s;
!content
end handle IO.Io _ => NONE)
| s => s
(* regionContent:
inputSource * SourceMap.region
-> (SourceMap.region * string * int) option *)
fun regionContent (src as {sourceMap,...}: inputSource, region) =
case getContent src
of NONE => NONE
| SOME content =>
let val wideregion as (lo,hi) = SourceMap.widenToLines sourceMap region
val content = substring(content, lo-1, hi-lo)
val ({line,...},_)::_ = SourceMap.fileregion sourceMap wideregion
in SOME(content, wideregion, line)
end
end (* structure Source *)
|
