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https://github.com/c-cube/ocaml-containers.git
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111 lines
3 KiB
OCaml
111 lines
3 KiB
OCaml
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(*
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copyright (c) 2014, simon cruanes
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all rights reserved.
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redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer. redistributions in binary
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form must reproduce the above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other materials provided with
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the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*)
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(** {1 Hierarchic logging} *)
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module BS = BencodeStream
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type t = {
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name : string;
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out : out_channel;
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encoder : BS.Encode.t;
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cleanup : bool;
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mutable context : string list;
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}
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let __new_name =
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let r = ref 0 in
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fun () ->
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let name = Printf.sprintf "Tell.log_%d" !r in
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incr r;
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name
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let to_chan ?(cleanup=false) o = {
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name = __new_name ();
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out = o;
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encoder = BS.Encode.create (`Out o);
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cleanup;
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context = [];
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}
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let to_file filename =
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let o = open_out filename in
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to_chan ~cleanup:true o
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let close log =
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if log.cleanup
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then close_out log.out
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let step log msg =
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BS.Encode.push log.encoder BS.BeginDict;
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BS.Encode.push log.encoder (BS.String "step");
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BS.Encode.push log.encoder (BS.String msg);
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BS.Encode.push log.encoder BS.End
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let enter log =
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BS.Encode.push log.encoder BS.BeginList
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let exit log =
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BS.Encode.push log.encoder BS.End
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let within ~log f =
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BS.Encode.push log.encoder BS.BeginDict;
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BS.Encode.push log.encoder (BS.String "section");
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try
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let x = f () in
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BS.Encode.push log.encoder BS.End;
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x
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with e ->
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BS.Encode.push log.encoder BS.End;
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raise e
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module B = struct
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let step ~log format =
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exit log;
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let b = Buffer.create 24 in
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Printf.kbprintf
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(fun b ->
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BS.Encode.push log.encoder (BS.String (Buffer.contents b)))
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b format
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let enter ~log format =
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let b = Buffer.create 24 in
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let x = Printf.kbprintf
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(fun b ->
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BS.Encode.push log.encoder (BS.String (Buffer.contents b)))
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b format
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in
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enter log;
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x
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let exit ~log format =
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exit log;
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let b = Buffer.create 24 in
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Printf.kbprintf
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(fun b ->
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BS.Encode.push log.encoder (BS.String (Buffer.contents b)))
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b format
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end
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