72 lines
3.2 KiB
OCaml
72 lines
3.2 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Heptagon *)
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(* *)
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(* Gwenael Delaval, LIG/INRIA, UJF *)
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(* Leonard Gerard, Parkas, ENS *)
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(* Adrien Guatto, Parkas, ENS *)
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(* Cedric Pasteur, Parkas, ENS *)
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(* Marc Pouzet, Parkas, ENS *)
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(* *)
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(* Copyright 2012 ENS, INRIA, UJF *)
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(* *)
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(* This file is part of the Heptagon compiler. *)
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(* *)
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(* Heptagon is free software: you can redistribute it and/or modify it *)
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(* under the terms of the GNU General Public License as published by *)
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(* the Free Software Foundation, either version 3 of the License, or *)
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(* (at your option) any later version. *)
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(* *)
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(* Heptagon is distributed in the hope that it will be useful, *)
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(* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
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(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *)
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(* GNU General Public License for more details. *)
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(* *)
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(* You should have received a copy of the GNU General Public License *)
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(* along with Heptagon. If not, see <http://www.gnu.org/licenses/> *)
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(* *)
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(***********************************************************************)
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exception Bad_format
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type token = Modifier of string | Literal of string
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type format = token list
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let tail s start =
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String.sub s start (String.length s - start)
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(** Return a list of expected types from a format string *)
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let rec format_of_string s =
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try
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let i = String.index s '%' in
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let l = format_of_string (tail s (i+2)) in
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if i = 0 then
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let modifier = String.sub s 1 1 in
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(Modifier modifier)::l
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else
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let lit = String.sub s 0 i in
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let modifier = String.sub s (i+1) 1 in
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(Literal lit)::(Modifier modifier)::l
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with
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| Invalid_argument _ -> raise Bad_format (* String.get failed*)
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| Not_found -> [Literal s]
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let types_of_format_string s =
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let ty_of_format f acc = match f with
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| Modifier "b" -> Initial.tbool::acc
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| Modifier "d" -> Initial.tint::acc
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| Modifier "f" -> Initial.tfloat::acc
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| Modifier "s" -> Initial.tstring::acc
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| _ -> acc
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in
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let sl = format_of_string s in
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List.fold_right ty_of_format sl []
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let tr_format f s =
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let aux tok acc = match tok with
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| Literal s -> s^acc
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| Modifier m -> "%"^(f m)^acc
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in
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let sl = format_of_string s in
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List.fold_right aux sl ""
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