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(** Module providing functions to pretty print a config or parts of a config. *)
open Types
(** The string used to print one level of indentation. Defaults to two spaces. *)
let indent_s = ref " "
(**/**)
(** Print a given number of level indentation. *)
let rec indent fmt n =
if n <= 0 then () else Format.fprintf fmt "%s%a" !indent_s indent (n - 1)
(**/**)
(** Print a name or a parameter on a given formatter. The function will try to
print with as low quoting as possible. *)
let param =
let chars_to_quote = Hashtbl.create 512 in
Array.iter
(fun c -> Hashtbl.add chars_to_quote c ())
[| ' '; '{'; '}'; '"'; '\\'; '\''; '\n'; '\r'; '\t' |];
fun fmt param ->
if String.length param = 0 then Format.fprintf fmt {|""|}
else if String.exists (Hashtbl.mem chars_to_quote) param then begin
if String.contains param '"' && not (String.contains param '\'') then
Format.fprintf fmt {|'%s'|} param
else
let buf = Buffer.create (String.length param) in
String.iter
(function
| '\n' -> Buffer.add_string buf "\\n"
| '\r' -> Buffer.add_string buf "\\r"
| '\t' -> Buffer.add_string buf "\\t"
| '"' -> Buffer.add_string buf "\\\""
| '\\' -> Buffer.add_string buf "\\\\"
| c -> Buffer.add_char buf c )
param;
let param = Buffer.contents buf in
Format.fprintf fmt {|"%s"|} param
end
else Format.fprintf fmt "%s" param
(** Print a list of parameters on a given formatter. *)
let params fmt = function
| [] -> ()
| params ->
Format.fprintf fmt " %a"
(Format.pp_print_list
~pp_sep:(fun fmt () -> Format.fprintf fmt " ")
param )
params
(** Print children of a directive on a given formatter. *)
let rec children n fmt (children : Types.directive list) =
match children with
| [] -> ()
| children ->
Format.fprintf fmt " {@.%a@.%a}" (config n) children indent (max 0 (n - 1))
(** Print a directive on a given formatter. *)
and directive n fmt d =
Format.fprintf fmt {|%a%a%a%a|} indent n param d.name params d.params
(children (n + 1))
d.children
(** Print a config on a given formatter. *)
and config n fmt (config : Types.config) =
Format.pp_print_list
~pp_sep:(fun fmt () -> Format.fprintf fmt "@.%a" indent (max 0 (n - 2)))
(directive n) fmt config
(** Print children of a directive on a given formatter. *)
let children = children 0
(** Print a directive on a given formatter. *)
let directive = directive 0
(** Print a config on a given formatter. *)
let config = config 0