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{
***************************************************************************
* *
* This source 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. *
* *
* This code 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. *
* *
* A copy of the GNU General Public License is available on the World *
* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
* obtain it by writing to the Free Software Foundation, *
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
***************************************************************************
Author: Mattias Gaertner
Abstract:
Demonstration of how to convert c header files to pascal interfaces.
Usage:
h2pastest [filename.h]
}
program H2PasTest;
{$mode objfpc}{$H+}
uses
Classes, SysUtils,
// LazUtils
LazFileUtils,
// CodeTools
CodeCache, CodeToolManager, CCodeParserTool, FileProcs,
H2PasTool;
const
ConfigFilename = 'codetools.config';
var
Filename: String;
CCode, PasCode: TCodeBuffer;
Tool: TH2PasTool;
Caret: TCodeXYPosition;
OutputFilename: String;
CCodeTool: TCCodeParserTool;
i: Integer;
Param: String;
Filenames: TStringList;
Src: String;
Merger: TCHeaderFileMerger;
MergeAll: Boolean;
MergeFlags: TCHFileMergeFlags;
MacroName: String;
p: LongInt;
MacroValue: String;
MacroFuncName: String;
begin
Merger:=nil;
try
Tool:=TH2PasTool.Create;
Merger:=TCHeaderFileMerger.Create;
Filenames:=TStringList.Create;
OutputFilename:=CleanAndExpandFilename(AppendPathDelim(GetCurrentDir)+'h2pasoutput.pas');
MergeAll:=false;
for i:=1 to Paramcount do begin
Param:=ParamStr(i);
if copy(Param,1,2)='-d' then begin
MacroName:=copy(Param,3,length(Param));
MacroValue:='';
p:=Pos('=',MacroName);
if p>0 then begin
MacroValue:=copy(MacroName,p+1,length(MacroName));
MacroName:=copy(MacroName,1,p-1);
end;
MacroName:=copy(MacroName,1,255);
p:=System.Pos('(',MacroName);
if p<1 then begin
// macro (not macro function)
if not IsValidIdent(MacroName) then begin
writeln('invalid macro name "',MacroName,'"');
Halt;
end;
Merger.Macros[MacroName]:=MacroValue;
Tool.Defines.Add(MacroName,MacroValue);
end else begin
// maybe a macro function
MacroFuncName:=copy(MacroName,1,p-1);
if not IsValidIdent(MacroFuncName) then begin
writeln('invalid macro name "',MacroFuncName,'"');
Halt;
end;
if p=length(MacroName) then begin
writeln('invalid macro function "',MacroName,'"');
Halt;
end;
if MacroName[p+1]<>')' then begin
writeln('macro function "',MacroName,'": parameters are not supported yet');
Halt;
end;
Merger.Macros[MacroName]:=MacroValue;
end
end
else if copy(Param,1,2)='-u' then begin
MacroName:=copy(Param,3,255);
if not IsValidIdent(MacroName) then begin
writeln('invalid macro name "',MacroName,'"');
Halt;
end;
Merger.Macros[MacroName]:='';
Tool.Undefines.Add(MacroName,'');
end
else if copy(Param,1,2)='-o' then
OutputFilename:=CleanAndExpandFilename(Param)
else if Param='--merge-all' then
MergeAll:=true
else if copy(Param,1,1)='-' then begin
writeln('Usage: ',ParamStr(0),' [--merge-all] [-d<definesymbol>]... [-u<undefinesymbol>]... <main header filename> <sub header file> ... -o<Outputfilename>');
writeln();
writeln(' Scans for include directives and inserts given sub include files.');
writeln('');
writeln(' --merge-all');
writeln(' Merge all given files. Normally only files needed by the main header files are merged.');
writeln(' -u<name>');
writeln(' Undefines a macro. "#idfef name" will give false.');
writeln(' -d<name>');
writeln(' Defines a macro with an empty value. "#idfef name" will give true.');
writeln(' -d<name>=<value>');
writeln(' Defines a macro with a value. Value is not replaced recursively.');
writeln(' -d"<name>()"=<value>');
writeln(' Defines a macro function with a value. Value is not replaced recursively.');
writeln(' The function fits any number of parameters.');
writeln('');
writeln('For example:');
writeln(' ',ParamStr(0),' -dEnableFlag -dFlag2=Value -uUndefineMacro test.h header2.h');
writeln(' ',ParamStr(0),' -d"printf()" test.h');
Halt;
end else begin
Filename:=CleanAndExpandFilename(Param);
Filenames.Add(Filename);
end;
end;
CodeToolBoss.SimpleInit(ConfigFilename);
// for demonstration purpose run the tool on the example file
if Filenames.Count=0 then
Filenames.Add(CleanAndExpandFilename(GetCurrentDir+'/scanexamples/test.h'));
// Step 1: load all input files
MergeFlags:=[];
if MergeAll then Include(MergeFlags,chfmfAll);
Merger.Merge(Filenames,CodeToolBoss.SourceCache,MergeFlags);
//Merger.WriteDebugReport;
Src:=Merger.CombinedSource.Source;
{writeln;
writeln('======Combined c header files================');
writeln(Src);
writeln('=============================================');}
// ToDo:
// Tool.UndefineEnclosingIFNDEF(CCode);
// Step 2: create a temporary file
Filename:='h2pasoutput.pas';
CCode:=CodeToolBoss.CreateTempFile(Filename);
if CCode=nil then
raise Exception.Create('failed creating temporary file '+Filename);
CCode.Source:=Src;
// Step 3: create the output file
PasCode:=CodeToolBoss.CreateFile(OutputFilename);
if PasCode=nil then
raise Exception.Create('creating failed '+OutputFilename);
// Step 4: convert
Tool.SourceName:=ExtractFileNameOnly(PasCode.Filename);
Tool.Convert(CCode,PasCode);
//Tool.WriteDebugReport;
Tool.WriteH2PNodeReport;
Tool.WriteH2PDirectivesNodeReport;
writeln;
writeln('=============================================');
writeln(PasCode.Source);
// clean up
CCode.ReleaseRefCount;
Tool.Free;
Filenames.Free;
// Step 5: write unit
if PasCode.Save then
writeln('Wrote ',PasCode.Filename)
else
writeln('Failed writing ',PasCode.Filename);
FreeAndNil(Merger);
except
on E: ECCodeParserException do begin
CCodeTool:=ECCodeParserException(E).Sender;
CCodeTool.CleanPosToCaret(CCodeTool.LastErrorReportPos,Caret);
writeln('Combined source: ',
Caret.Code.Filename+'('+IntToStr(Caret.Y)+','+IntToStr(Caret.X)+')',
' ',dbgstr(copy(CCodeTool.Src,CCodeTool.LastErrorReportPos-40,40)),'|',
dbgstr(copy(CCodeTool.Src,CCodeTool.LastErrorReportPos,40)));
if Merger<>nil then begin
Merger.MergedPosToOriginal(Caret.X,Caret.Y,Caret.Code,Caret.X,Caret.Y);
end;
writeln('Origin: ',Caret.Code.Filename+'('+IntToStr(Caret.Y)+','+IntToStr(Caret.X)+')'+' Error: '+E.Message);
end;
on E: Exception do begin
writeln(E.Message);
end;
end;
end.
|
