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(* $Id$ *)
(* Copyright 2004 Sascha Husa, Ian Hinder, Christiane Lechner
This file is part of Kranc.
Kranc is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kranc is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kranc; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
BeginPackage["CodeGen`", {"Errors`", "Kranc`"}];
FlattenBlock::usage = "FlattenBlock[block] converts 'block' to a string.";
SeparatedBlock::usage = "SeparatedBlock[block] returns a version of 'block' with " <>
"a newline before it.";
GenerateFile::usage = "GenerateFile[name, block] writes 'block' to a file of the " <>
"specified 'name'.";
AddToFile::usage = "AddToFile[name, block] appends 'block' to a file of the " <>
"specified 'name'.";
SpaceSeparated::usage = "";
NewlineSeparated::usage = "";
InfoVariable::usage = "";
CommaNewlineSeparated::usage = "";
CommaSeparated::usage = "";
Stringify::usage = "";
Quote::usage = "Quote[x] returns x surrounded by quotes";
IndentBlock::usage = "";
IndentBlock2::usage = "";
CheckBlock::usage = "";
CodeGenBlock := _String | _?AtomQ | List[(_?(MatchQ[#, CodeGenBlock] &)) ...];
Boolean = (True | False);
Begin["`Private`"];
(* Code generation utilities; not specific to any language *)
DefFn[
CheckBlock[s_String] := s];
DefFn[
CheckBlock[a_?AtomQ] := a];
DefFn[
CheckBlock[l_List] := Map[CheckBlock, l]];
DefFn[
FlattenBlock[b_] :=
Module[
{flattenBlock},
flattenBlock[x_String] := x;
flattenBlock[l_List] := StringJoin@@Map[FlattenBlock, l];
flattenBlock[a_?AtomQ] := ToString[a];
CheckBlock[b];
flattenBlock[b]]];
DefFn[
IndentBlock[block:CodeGenBlock] :=
StringDrop[" " <> StringReplace[FlattenBlock[block], {"\n" -> "\n "}],-2]];
(* This should be used everywhere - need to tidy up the newline convention in CodeGen *)
DefFn[
IndentBlock2[block:CodeGenBlock] :=
Riffle[Map[StringJoin[" ",#] &,
StringSplit[FlattenBlock[block],"\n"]],"\n"]];
DefFn[
SeparatedBlock[block:CodeGenBlock] := {"\n", block}];
ErrorDefinition[SeparatedBlock];
DefFn[
GenerateFile[filename_String, contents_] :=
Module[
{fp = OpenWrite[filename]},
CheckBlock[contents];
WriteString[fp, FlattenBlock[contents]];
Close[fp]]];
DefFn[
AddToFile[filename_String, contents:CodeGenBlock] :=
Module[
{fp = OpenAppend[filename]},
WriteString[fp, FlattenBlock[contents]];
Close[fp]]];
DefFn[
CommaNewlineSeparated[l_List] :=
Riffle[l, ",\n"]];
DefFn[
SpaceSeparated[l_List] :=
Riffle[l, " "]];
DefFn[
CommaSeparated[l_List] :=
Riffle[l, ", "]];
DefFn[
NewlineSeparated[l_List] :=
Riffle[l, "\n"]];
DefFn[
CommaInitSeparated[l_List] :=
Riffle[Map[{#," = INITVALUE"} &, l], ", "]];
(* Turn a section of code into a string:
1. quote all quotes (replace all quotes with backslash-quote)
2. break the string into lines to make it readable (replace all newlines
with quote-newline-quote)
3. surround the result with quotes *)
DefFn[
Stringify[x:CodeGenBlock] :=
"\"" <> StringReplace[StringReplace[FlattenBlock[x], "\"" -> "\\\""],
"\n" -> "\\n\"\n\""] <> "\"\n"];
DefFn[
PartitionVarList[list_List] :=
Module[
{partition, split},
partition[locallist_] :=
Module[
{cutoff},
cutoff = 6;
If[Length@locallist > cutoff, Partition[locallist, cutoff, cutoff, {1,1}, {}],
{locallist}]];
split = Split[list, NameRoot[#1] == NameRoot[#2] &];
split = Flatten[Map[partition, split], 1];
split]];
DefFn[
insertFile[name_String] :=
Module[
{istream_, contents_},
istream = OpenRead[name];
contents = ReadList[istream, String];
Close[istream];
contents]];
DefFn[
NameRoot[name_Symbol] :=
Module[
{dropNumberRule, root},
dropNumberRule = {"1" -> "", "2" -> "", "3" -> "", "4" -> "", "5" -> "",
"6" -> "", "7" -> "", "8" -> "", "9" -> "", "0" -> "", "rhs" -> ""};
root = StringReplace[ToString@name, dropNumberRule]]];
DefFn[
Quote[x:CodeGenBlock] :=
{"\"", x, "\""}];
End[];
EndPackage[];
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