mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
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592 lines
17 KiB
ObjectPascal
592 lines
17 KiB
ObjectPascal
{
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***************************************************************************
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* *
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* This source is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This code is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* General Public License for more details. *
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* *
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* A copy of the GNU General Public License is available on the World *
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* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
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* obtain it by writing to the Free Software Foundation, *
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* Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1335, USA. *
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* *
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***************************************************************************
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Author: Mattias Gaertner
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Abstract:
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Basic code functions for other languages than pascal.
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}
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unit NonPascalCodeTools;
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{$ifdef FPC}{$mode objfpc}{$endif}{$H+}
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{$inline on}
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interface
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uses
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SysUtils, KeywordFuncLists, FileProcs;
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// C
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function CompareCIdentifiers(Identifier1, Identifier2: PChar): integer;
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procedure ReadTilCLineEnd(const Source: string;
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var Position: integer);
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function ReadTilCBracketClose(const Source: string;
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var Position: integer): boolean;
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procedure ReadNextCAtom(const Source: string;
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var Position: integer; out AtomStart: integer);
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procedure ReadRawNextCAtom(const Source: string;
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var Position: integer; out AtomStart: integer);
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function IsCDecimalNumber(const Source: string; Position: integer): boolean;
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function IsCHexNumber(const Source: string; Position: integer): boolean;
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function IsCOctalNumber(const Source: string; Position: integer): boolean;
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function ExtractCCode(const Source: string;
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StartPos: integer = 1; EndPos: integer = -1): string;
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function CConstantToInt64(const s: string; out i: int64): boolean;
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// Makefile
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function ExtractCodeFromMakefile(const Source: string): string;
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implementation
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function CompareCIdentifiers(Identifier1, Identifier2: PChar): integer;
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begin
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if (Identifier1<>nil) then begin
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if (Identifier2<>nil) then begin
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while (Identifier1[0]=Identifier2[0]) do begin
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if (IsIdentChar[Identifier1[0]]) then begin
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inc(Identifier1);
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inc(Identifier2);
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end else begin
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Result:=0; // for example 'aaA;' 'aAa;'
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exit;
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end;
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end;
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if (IsIdentChar[Identifier1[0]]) then begin
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if (IsIdentChar[Identifier2[0]]) then begin
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if Identifier1[0]>Identifier2[0] then
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Result:=-1 // for example 'aab' 'aaa'
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else
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Result:=1; // for example 'aaa' 'aab'
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end else begin
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Result:=-1; // for example 'aaa' 'aa;'
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end;
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end else begin
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if (IsIdentChar[Identifier2[0]]) then
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Result:=1 // for example 'aa;' 'aaa'
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else
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Result:=0; // for example 'aa;' 'aa,'
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end;
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end else begin
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Result:=-1; // for example 'aaa' nil
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end;
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end else begin
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if (Identifier2<>nil) then begin
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Result:=1; // for example nil 'bbb'
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end else begin
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Result:=0; // for example nil nil
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end;
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end;
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end;
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procedure ReadTilCLineEnd(const Source: string; var Position: integer);
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var
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Len: Integer;
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AtomStart: Integer;
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begin
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{$IFOPT R+}{$DEFINE RangeChecking}{$ENDIF}
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{$R-}
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Len:=length(Source);
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if Position>Len then exit;
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AtomStart:=Position;
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while (AtomStart<=Len) and (not (Source[AtomStart] in [#10,#13])) do
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ReadRawNextCAtom(Source,Position,AtomStart);
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Position:=AtomStart;
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{$IFDEF RangeChecking}{$R+}{$UNDEF RangeChecking}{$ENDIF}
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end;
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function ReadTilCBracketClose(const Source: string; var Position: integer
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): boolean;
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// Position must start on a bracket
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// at end Position will be right behind closing bracket
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// if no closing bracket found then Position will be on the starting position
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var
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Len: Integer;
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CloseBracket: Char;
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AtomStart: LongInt;
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StartPos: LongInt;
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begin
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{$IFOPT R+}{$DEFINE RangeChecking}{$ENDIF}
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{$R-}
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Result:=false;
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Len:=length(Source);
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if Position>Len then exit;
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StartPos:=Position;
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case Source[Position] of
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'{': CloseBracket:='}';
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'[': CloseBracket:=']';
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'(': CloseBracket:=')';
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'<': CloseBracket:='>';
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else
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exit;
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end;
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inc(Position);
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AtomStart:=Position;
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repeat
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ReadRawNextCAtom(Source,Position,AtomStart);
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if AtomStart>Len then begin
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Position:=StartPos;
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exit;
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end;
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case Source[AtomStart] of
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'{','(','[':
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// skip nested bracketss
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begin
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Position:=AtomStart;
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if not ReadTilCBracketClose(Source,Position) then
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exit;
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end;
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else
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if Source[AtomStart]=CloseBracket then exit(true);
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end;
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until false;
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{$IFDEF RangeChecking}{$R+}{$UNDEF RangeChecking}{$ENDIF}
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end;
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procedure ReadNextCAtom(const Source: string; var Position: integer; out
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AtomStart: integer);
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begin
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{$IFOPT R+}{$DEFINE RangeChecking}{$ENDIF}
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{$R-}
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repeat
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ReadRawNextCAtom(Source,Position,AtomStart);
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if AtomStart>length(Source) then exit;
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case Source[AtomStart] of
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'#':
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// skip directive
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ReadTilCLineEnd(Source,Position);
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#0..#32:
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// skip space
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else
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// found normal C token
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exit;
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end;
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until false;
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{$IFDEF RangeChecking}{$R+}{$UNDEF RangeChecking}{$ENDIF}
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end;
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procedure ReadRawNextCAtom(const Source: string; var Position: integer;
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out AtomStart: integer);
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var
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Len:integer;
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c1,c2:char;
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begin
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{$IFOPT R+}{$DEFINE RangeChecking}{$ENDIF}
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{$R-}
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Len:=length(Source);
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// read til next atom
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while (Position<=Len) do begin
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case Source[Position] of
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#0..#9,#11,#12,#14..#32: // spaces and special characters
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begin
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inc(Position);
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end;
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#$EF:
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if (Source[Position+1]=#$BB)
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and (Source[Position+2]=#$BF) then begin
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// skip UTF BOM
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inc(Position,3);
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end else begin
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break;
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end;
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'\': // backslash
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if (Position<Len) and (Source[Position+1] in [#10,#13]) then begin
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inc(Position,2);
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if (Position<=Len) and (Source[Position] in [#10,#13])
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and (Source[Position-1]<>Source[Position]) then begin
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inc(Position);
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end;
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end;
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'/': // comment or division
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if (Position<Len) then begin
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if (Source[Position+1]='/') then begin
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// comment start -> read til line end
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inc(Position);
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while (Position<=Len) do begin
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case Source[Position] of
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#10,#13: break;
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'\':
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begin
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inc(Position);
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if (Position<=Len) then begin
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inc(Position);
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if (Position<=Len) and (Source[Position-1] in [#10,#13])
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and (Source[Position] in [#10,#13])
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and (Source[Position-1]<>Source[Position]) then begin
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inc(Position);
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end;
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end;
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end;
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else inc(Position);
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end;
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end;
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end else if (Source[Position+1]='*') then begin
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// comment start -> read */
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inc(Position);
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while (Position<=Len) do begin
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if (Source[Position]='*')
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and (Position<Len)
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and (Source[Position+1]='/') then begin
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inc(Position,2);
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break;
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end;
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inc(Position);
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end;
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end else
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break;
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end else
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break;
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'(': // comment or bracket
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if (Position<Len) and (Source[Position]='*') then begin
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// comment start -> read til comment end
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inc(Position,2);
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while true do begin
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case Source[Position] of
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#0: if Position>Len then break;
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'*':
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if (Source[Position+1]=')') then begin
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inc(Position,2);
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break;
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end;
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end;
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inc(Position);
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end;
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end else
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// round bracket open
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break;
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else
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break;
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end;
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end;
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// read atom
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AtomStart:=Position;
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if Position<=Len then begin
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c1:=Source[Position];
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case c1 of
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#10,#13:
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begin
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inc(Position);
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if (Position<=Len) and (Source[Position] in [#10,#13])
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and (Source[Position]<>c1) then
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inc(Position);
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end;
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'A'..'Z','a'..'z','_':
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begin
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// identifier
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inc(Position);
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while (Position<=Len) and (IsIdentChar[Source[Position]]) do
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inc(Position);
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end;
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'0'..'9': // number
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if (c1='0') and (Source[Position+1]='x') then begin
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inc(Position);
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// hex number
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repeat
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inc(Position);
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until (Position>Len) or (not IsHexNumberChar[Source[Position]]);
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end else if (c1='0') and (Source[Position+1] in ['0'..'7']) then begin
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// octal number
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repeat
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inc(Position);
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until (Position>Len) or (not (Source[Position] in ['0'..'7']));
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end else begin
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inc(Position);
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// read number
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while (Position<=Len) and (Source[Position] in ['0'..'9']) do
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inc(Position);
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if (Position<Len) and (Source[Position]='.')
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and (Source[Position+1]<>'.') then begin
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// real type number
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inc(Position);
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while (Position<=Len) and (Source[Position] in ['0'..'9']) do
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inc(Position);
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if (Position<=Len) and (Source[Position] in ['e','E']) then begin
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// read exponent
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inc(Position);
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if (Position<=Len) and (Source[Position]='-') then inc(Position);
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while (Position<=Len) and (Source[Position] in ['0'..'9']) do
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inc(Position);
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end;
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end;
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end;
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'"': // string constant
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begin
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while (Position<=Len) do begin
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if (Source[Position]='"') then
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begin
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inc(Position);
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while (Position<=Len)
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and (Source[Position]<>'"') do
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inc(Position);
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inc(Position);
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end else
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break;
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end;
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end;
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'''': // char constant
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begin
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inc(Position);
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if (Position<=Len) then begin
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if Source[Position]='\' then
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inc(Position);
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inc(Position);
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if (Position<=Len) and (Source[Position]='''') then begin
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inc(Position);
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end;
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end;
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end;
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else
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inc(Position);
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if Position<=Len then begin
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c2:=Source[Position];
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// test for double char operators
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if ((c2='=') and (c1 in ['=','!','<','>','+','-','*','/','&','|']))
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or ((c1=':') and (c2=':'))
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or ((c1='|') and (c2='|'))
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or ((c1='&') and (c2='&'))
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or ((c1='+') and (c2='+'))
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or ((c1='-') and (c2='-'))
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or ((c1='-') and (c2='>'))
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or ((c1='>') and (c2='>'))
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or ((c1='<') and (c2='<'))
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then
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inc(Position)
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else if ((c1='.') and (c2='.') and (Source[Position+1]='.')) then
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inc(Position,2);
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end;
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end;
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end;
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{$IFDEF RangeChecking}{$R+}{$UNDEF RangeChecking}{$ENDIF}
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end;
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function IsCDecimalNumber(const Source: string; Position: integer): boolean;
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var
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l: Integer;
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begin
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{$IFOPT R+}{$DEFINE RangeChecking}{$ENDIF}
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{$R-}
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Result:=false;
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l:=length(Source);
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if (Position<1) or (Position>l) or (not IsNumberChar[Source[Position]])
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then exit;
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// check octal and hex number
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if (Source[Position]='0') and (Source[Position+1] in ['x','0'..'9'])
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then exit;
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// check float
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inc(Position);
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while (Position<=l) and (IsNumberChar[Source[Position]]) do
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inc(Position);
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if Source[Position]='.' then exit;
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Result:=true;
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{$IFDEF RangeChecking}{$R+}{$UNDEF RangeChecking}{$ENDIF}
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end;
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function IsCHexNumber(const Source: string; Position: integer): boolean;
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begin
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Result:=(Position>=1) and (Position<length(Source))
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and (Source[Position]='0') and (Source[Position+1]='x');
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end;
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function IsCOctalNumber(const Source: string; Position: integer): boolean;
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begin
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Result:=(Position>=1) and (Position<length(Source))
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and (Source[Position]='0') and (Source[Position+1] in ['0'..'7']);
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end;
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function ExtractCCode(const Source: string; StartPos: integer;
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EndPos: integer): string;
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var
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DstPos: Integer;
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SrcPos: Integer;
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SrcLen: Integer;
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AtomStart: integer;
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begin
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{$IFOPT R+}{$DEFINE RangeChecking}{$ENDIF}
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{$R-}
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Result:=Source;
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DstPos:=1;
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SrcPos:=StartPos;
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SrcLen:=length(Source);
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if EndPos<1 then EndPos:=SrcLen+1;
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if EndPos>SrcLen then EndPos:=SrcLen+1;
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if SrcPos<EndPos then begin
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repeat
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ReadRawNextCAtom(Source,SrcPos,AtomStart);
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if AtomStart>=EndPos then break;
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if not (Source[AtomStart] in [#10,#13]) then begin
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if IsIdentChar[Source[AtomStart]]
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and (DstPos>1) and IsIdentChar[Result[DstPos-1]] then begin
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// space needed between words/numbers
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Result[DstPos]:=' ';
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inc(DstPos);
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end;
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// copy word
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while AtomStart<SrcPos do begin
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Result[DstPos]:=Source[AtomStart];
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inc(AtomStart);
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inc(DstPos);
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end;
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end;
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until false;
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end;
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if DstPos>length(Result)+1 then begin
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DebugLn(['ExtractCCode Source="',Source,'"']);
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raise Exception.Create('');
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end;
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SetLength(Result,DstPos-1);
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{$IFDEF RangeChecking}{$R+}{$UNDEF RangeChecking}{$ENDIF}
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end;
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function ExtractCodeFromMakefile(const Source: string): string;
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// remove comments, empty lines, double spaces, replace newline chars with #10
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procedure Run(var NewSrc: string; out NewLength: integer);
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var
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SrcLen: Integer;
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SrcPos: Integer;
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DestPos: Integer;
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LastChar: Char;
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LineEndPos: LongInt;
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EndPos: LongInt;
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IsEmptyLine: Boolean;
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CommentStartPos: Integer;
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begin
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SrcPos:=1;
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SrcLen:=length(Source);
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DestPos:=1;
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while SrcPos<=SrcLen do begin
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// check if line is empty
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LineEndPos:=SrcPos;
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IsEmptyLine:=true;
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CommentStartPos:=0;
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while (LineEndPos<=SrcLen) do begin
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case Source[LineEndPos] of
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#10,#13: break;
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' ',#9: ;
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'#': if (CommentStartPos<1) then CommentStartPos:=LineEndPos;
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else
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if IsEmptyLine and (CommentStartPos<1) then
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IsEmptyLine:=false;
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end;
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inc(LineEndPos);
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end;
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//DebugLn(['Run SrcPos=',SrcPos,' LineEndPos=',LineEndPos,' Line="',dbgstr(copy(Source,SrcPos,LineEndPos-SrcPos)),'" IsEmpty=',IsEmptyLine]);
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// copy line content
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if not IsEmptyLine then begin
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LastChar:=#0;
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if Source[SrcPos]=#9 then begin
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// first character is tab
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LastChar:=#9;
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if NewSrc<>'' then
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NewSrc[DestPos]:=LastChar;
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inc(DestPos);
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inc(SrcPos);
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end;
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EndPos:=LineEndPos;
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if CommentStartPos>0 then
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EndPos:=CommentStartPos;
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while SrcPos<EndPos do begin
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if (not (Source[SrcPos] in [' ',#9]))
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or (not (LastChar in [' ',#9])) then begin
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LastChar:=Source[SrcPos];
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if NewSrc<>'' then
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NewSrc[DestPos]:=LastChar;
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inc(DestPos);
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end;
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inc(SrcPos);
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end;
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if NewSrc<>'' then
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NewSrc[DestPos]:=#10;
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inc(DestPos);
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end;
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// next line
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SrcPos:=LineEndPos+1;
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if (SrcPos<=SrcLen) and (Source[SrcPos] in [#10,#13])
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and (Source[SrcPos]<>Source[SrcPos-1]) then
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inc(SrcPos);
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end;
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NewLength:=DestPos-1;
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end;
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var
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NewLength: integer;
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begin
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|
//DebugLn(['ExtractCodeFromMakefile START ',Result]);
|
|
Result:='';
|
|
Run(Result,NewLength);
|
|
SetLength(Result,NewLength);
|
|
Run(Result,NewLength);
|
|
//DebugLn(['ExtractCodeFromMakefile END ',Result]);
|
|
end;
|
|
|
|
function CConstantToInt64(const s: string; out i: int64): boolean;
|
|
var
|
|
p: Integer;
|
|
l: Integer;
|
|
begin
|
|
i:=0;
|
|
Result:=false;
|
|
if s='' then exit;
|
|
l:=length(s);
|
|
try
|
|
if s='0' then begin
|
|
Result:=true;
|
|
end else if (s[1]='0') and (s[2] in ['0'..'7']) then begin
|
|
// octal
|
|
p:=2;
|
|
while (p<=l) and (s[p] in ['0'..'7']) do begin
|
|
i:=i*8+ord(s[p])-ord('0');
|
|
dec(p);
|
|
end;
|
|
Result:=p>l;
|
|
end else if (s[1]='0') and (s[2]='x') then begin
|
|
// hex
|
|
p:=3;
|
|
while (p<=l) and (IsHexNumberChar[s[p]]) do begin
|
|
i:=i*16;
|
|
case s[p] of
|
|
'0'..'9': i:=i*16+ord(s[p])-ord('0');
|
|
'a'..'f': i:=i*16+ord(s[p])-ord('a');
|
|
'A'..'F': i:=i*16+ord(s[p])-ord('A');
|
|
else break;
|
|
end;
|
|
dec(p);
|
|
end;
|
|
Result:=p>l;
|
|
end else begin
|
|
// decimal
|
|
p:=1;
|
|
while (p<=l) and (s[p] in ['0'..'9']) do begin
|
|
i:=i*10+ord(s[p])-ord('0');
|
|
dec(p);
|
|
end;
|
|
Result:=p>l;
|
|
end;
|
|
except
|
|
end;
|
|
end;
|
|
|
|
end.
|
|
|