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(* Copyright (c) 2008, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
structure MonoOpt :> MONO_OPT = struct
open Mono
structure U = MonoUtil
fun typ t = t
fun decl d = d
fun attrifyInt n =
if n < 0 then
"-" ^ Int64.toString (Int64.~ n)
else
Int64.toString n
fun attrifyFloat n =
if n < 0.0 then
"-" ^ Real.toString (Real.~ n)
else
Real.toString n
val attrifyString = String.translate (fn #"\"" => """
| #"&" => "&"
| ch => if Char.isPrint ch then
str ch
else
"&#" ^ Int.toString (ord ch) ^ ";")
val urlifyInt = attrifyInt
val urlifyFloat = attrifyFloat
val htmlifyString = String.translate (fn ch => case ch of
#"<" => "<"
| #"&" => "&"
| _ =>
if Char.isPrint ch orelse Char.isSpace ch then
str ch
else
"&#" ^ Int.toString (ord ch) ^ ";")
fun hexIt ch =
let
val s = Int.fmt StringCvt.HEX (ord ch)
in
case size s of
0 => "00"
| 1 => "0" ^ s
| _ => s
end
val urlifyString = String.translate (fn #" " => "+"
| ch => if Char.isAlphaNum ch then
str ch
else
"%" ^ hexIt ch)
fun exp e =
case e of
EPrim (Prim.String s) =>
let
val (_, chs) =
CharVector.foldl (fn (ch, (lastSpace, chs)) =>
let
val isSpace = Char.isSpace ch
in
if isSpace andalso lastSpace then
(true, chs)
else
(isSpace, ch :: chs)
end)
(false, []) s
in
EPrim (Prim.String (String.implode (rev chs)))
end
| EStrcat ((EPrim (Prim.String s1), loc), (EPrim (Prim.String s2), _)) =>
let
val s =
if size s1 > 0 andalso size s2 > 0
andalso Char.isSpace (String.sub (s1, size s1 - 1))
andalso Char.isSpace (String.sub (s2, 0)) then
s1 ^ String.extract (s2, 1, NONE)
else
s1 ^ s2
in
EPrim (Prim.String s)
end
| EStrcat ((EPrim (Prim.String s1), loc), (EStrcat ((EPrim (Prim.String s2), _), rest), _)) =>
let
val s =
if size s1 > 0 andalso size s2 > 0
andalso Char.isSpace (String.sub (s1, size s1 - 1))
andalso Char.isSpace (String.sub (s2, 0)) then
s1 ^ String.extract (s2, 1, NONE)
else
s1 ^ s2
in
EStrcat ((EPrim (Prim.String s), loc), rest)
end
| EStrcat ((EStrcat (e1, e2), loc), e3) =>
optExp (EStrcat (e1, (EStrcat (e2, e3), loc)), loc)
| EWrite (EStrcat (e1, e2), loc) =>
ESeq ((optExp (EWrite e1, loc), loc),
(optExp (EWrite e2, loc), loc))
| ESeq ((EWrite (EPrim (Prim.String s1), _), loc),
(EWrite (EPrim (Prim.String s2), _), _)) =>
EWrite (EPrim (Prim.String (s1 ^ s2)), loc)
| ESeq ((EWrite (EPrim (Prim.String s1), _), loc),
(ESeq ((EWrite (EPrim (Prim.String s2), _), _),
e), _)) =>
ESeq ((EWrite (EPrim (Prim.String (s1 ^ s2)), loc), loc),
e)
| EFfiApp ("Basis", "htmlifyString", [(EPrim (Prim.String s), _)]) =>
EPrim (Prim.String (htmlifyString s))
| EWrite (EFfiApp ("Basis", "htmlifyString", [(EPrim (Prim.String s), _)]), loc) =>
EWrite (EPrim (Prim.String (htmlifyString s)), loc)
| EWrite (EFfiApp ("Basis", "htmlifyString", [e]), _) =>
EFfiApp ("Basis", "htmlifyString_w", [e])
| EFfiApp ("Basis", "htmlifyString_w", [(EPrim (Prim.String s), loc)]) =>
EWrite (EPrim (Prim.String (htmlifyString s)), loc)
| EFfiApp ("Basis", "attrifyInt", [(EPrim (Prim.Int n), _)]) =>
EPrim (Prim.String (attrifyInt n))
| EWrite (EFfiApp ("Basis", "attrifyInt", [(EPrim (Prim.Int n), _)]), loc) =>
EWrite (EPrim (Prim.String (attrifyInt n)), loc)
| EWrite (EFfiApp ("Basis", "attrifyInt", [e]), _) =>
EFfiApp ("Basis", "attrifyInt_w", [e])
| EFfiApp ("Basis", "attrifyFloat", [(EPrim (Prim.Float n), _)]) =>
EPrim (Prim.String (attrifyFloat n))
| EWrite (EFfiApp ("Basis", "attrifyFloat", [(EPrim (Prim.Float n), _)]), loc) =>
EWrite (EPrim (Prim.String (attrifyFloat n)), loc)
| EWrite (EFfiApp ("Basis", "attrifyFloat", [e]), _) =>
EFfiApp ("Basis", "attrifyFloat_w", [e])
| EFfiApp ("Basis", "attrifyString", [(EPrim (Prim.String s), _)]) =>
EPrim (Prim.String (attrifyString s))
| EWrite (EFfiApp ("Basis", "attrifyString", [(EPrim (Prim.String s), _)]), loc) =>
EWrite (EPrim (Prim.String (attrifyString s)), loc)
| EWrite (EFfiApp ("Basis", "attrifyString", [e]), _) =>
EFfiApp ("Basis", "attrifyString_w", [e])
| EFfiApp ("Basis", "urlifyInt", [(EPrim (Prim.Int n), _)]) =>
EPrim (Prim.String (urlifyInt n))
| EWrite (EFfiApp ("Basis", "urlifyInt", [(EPrim (Prim.Int n), _)]), loc) =>
EWrite (EPrim (Prim.String (urlifyInt n)), loc)
| EWrite (EFfiApp ("Basis", "urlifyInt", [e]), _) =>
EFfiApp ("Basis", "urlifyInt_w", [e])
| EFfiApp ("Basis", "urlifyFloat", [(EPrim (Prim.Float n), _)]) =>
EPrim (Prim.String (urlifyFloat n))
| EWrite (EFfiApp ("Basis", "urlifyFloat", [(EPrim (Prim.Float n), _)]), loc) =>
EWrite (EPrim (Prim.String (urlifyFloat n)), loc)
| EWrite (EFfiApp ("Basis", "urlifyFloat", [e]), _) =>
EFfiApp ("Basis", "urlifyFloat_w", [e])
| EFfiApp ("Basis", "urlifyString", [(EPrim (Prim.String s), _)]) =>
EPrim (Prim.String (urlifyString s))
| EWrite (EFfiApp ("Basis", "urlifyString", [(EPrim (Prim.String s), _)]), loc) =>
EWrite (EPrim (Prim.String (urlifyString s)), loc)
| EWrite (EFfiApp ("Basis", "urlifyString", [e]), _) =>
EFfiApp ("Basis", "urlifyString_w", [e])
| EFfiApp ("Basis", "urlifyBool", [(ECon (Enum, PConFfi {con = "True", ...}, NONE), _)]) =>
EPrim (Prim.String "1")
| EFfiApp ("Basis", "urlifyBool", [(ECon (Enum, PConFfi {con = "False", ...}, NONE), _)]) =>
EPrim (Prim.String "0")
| EWrite (EFfiApp ("Basis", "urlifyBool", [(ECon (Enum, PConFfi {con = "True", ...}, NONE), _)]), loc) =>
EWrite (EPrim (Prim.String "1"), loc)
| EWrite (EFfiApp ("Basis", "urlifyBool", [(ECon (Enum, PConFfi {con = "False", ...}, NONE), _)]), loc) =>
EWrite (EPrim (Prim.String "0"), loc)
| EWrite (EFfiApp ("Basis", "urlifyBool", [e]), _) =>
EFfiApp ("Basis", "urlifyBool_w", [e])
| EWrite (ECase (discE, pes, {disc, ...}), loc) =>
optExp (ECase (discE,
map (fn (p, e) => (p, (EWrite e, loc))) pes,
{disc = disc,
result = (TRecord [], loc)}), loc)
| _ => e
and optExp e = #1 (U.Exp.map {typ = typ, exp = exp} e)
val optimize = U.File.map {typ = typ, exp = exp, decl = decl}
end
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