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// Copyright (C) 2006-2007 Sandy Dunlop (sandy@sorn.net)
//
// This program 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 program 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 this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
using System;
using System.IO;
using System.Reflection;
using System.Collections;
using System.Collections.Generic;
using Wildcat.Cobol.Compiler.References;
using Wildcat.Cobol.Compiler.Structure;
using Wildcat.Cobol.Compiler.Exceptions;
namespace Wildcat.Cobol.Compiler.ILGenerator
{
public partial class Generator
{
private FileAndSortDescriptionEntry GetFSDE(string name)
{
if (_program.Data!=null && _program.Data.FileSection!=null)
{
foreach (FileAndSortDescriptionEntry fsde in _program.Data.FileSection.Entries)
{
if (fsde.Name.Name == name)
{
return fsde;
}
}
}
return null;
}
private DataDescription GetDDEByName(string name)
{
return _program.VariableDeclarations[name] as DataDescription;
}
private string EmitOpenStatement(OpenStatement openStatement)
{
string r = "";
string className = "__CobolProgram";
//Console.WriteLine("Emitting Open Statement");
//fsde.FileControlEntry;
foreach (string fd in openStatement.Files)
{
FileAndSortDescriptionEntry fsde = GetFSDE(fd);
//Console.WriteLine("FD = "+fd);
//Pointer to this...
r += " " + ILAddress(1) + "ldarg.0\n";
//TODO: Load filename
r+=EmitLoadSource(fsde.FileControlEntry.Assign.Source, false, false);
if (openStatement.IsInput)
{
//Open for read...
r += " " + ILAddress(5);
r += "newobj instance void class [mscorlib]System.IO.StreamReader::.ctor(string)\n";
r += " " + ILAddress(5);
r += "stfld class [mscorlib]System.IO.StreamReader "+className+"::_reader_"+ILIdentifier(fd)+"\n";
}else{
//Open for write...
r += " " + ILAddress(5);
r += "newobj instance void class [mscorlib]System.IO.StreamWriter::.ctor(string)\n";
r += " " + ILAddress(5);
r += "stfld class [mscorlib]System.IO.StreamWriter "+className+"::_writer_"+ILIdentifier(fd)+"\n";
}
}
return r;
}
private string EmitCloseStatement(CloseStatement closeStatement)
{
string r = "";
string className = "__CobolProgram";
//Console.WriteLine("Emitting Close Statement");
foreach (string fd in closeStatement.Files)
{
FileAndSortDescriptionEntry fsde = GetFSDE(fd);
//Work out if it's read or write mode
r += " " + ILAddress(1) + "ldarg.0\n";
r += " " + ILAddress(5);
r += "ldfld class [mscorlib]System.IO.StreamWriter "+className+"::_writer_"+ILIdentifier(fd)+"\n";
r += " " + ILAddress(1) + "ldnull\n";
r += " " + ILAddress(5) + "bne.un ";
//Read mode...
string r2 = "";
r2 += " " + ILAddress(1) + "ldarg.0\n";
r2 += " " + ILAddress(5);
r2 += "ldfld class [mscorlib]System.IO.StreamReader "+className+"::_reader_"+ILIdentifier(fd)+"\n";
r2 += " " + ILAddress(5);
r2 += "callvirt instance void class [mscorlib]System.IO.StreamReader::Close()\n";
r2 += " " + ILAddress(1) + "ldarg.0\n";
r2 += " " + ILAddress(1) + "ldnull\n";
r2 += " " + ILAddress(5);
r2 += "stfld class [mscorlib]System.IO.StreamReader "+className+"::_reader_"+ILIdentifier(fd)+"\n";
r2 += " " + ILAddress(5) + "br ";
//Write mode...
r += ILAddress() + "\n";
string r3 = "";
r3 += " " + ILAddress(1) + "ldarg.0\n";
r3 += " " + ILAddress(5);
r3 += "ldfld class [mscorlib]System.IO.StreamWriter "+className+"::_writer_"+ILIdentifier(fd)+"\n";
r3 += " " + ILAddress(5);
r3 += "callvirt instance void class [mscorlib]System.IO.StreamWriter::Close()\n";
r3 += " " + ILAddress(1) + "ldarg.0\n";
r3 += " " + ILAddress(1) + "ldnull\n";
r3 += " " + ILAddress(5);
r3 += "stfld class [mscorlib]System.IO.StreamWriter "+className+"::_writer_"+ILIdentifier(fd)+"\n";
r2 += ILAddress() + "\n";
r += r2;
r += r3;
}
return r;
}
private string EmitReadStatement(ReadStatement readStatement)
{
string r = "\n //Begin read statement...\n";
string className = "__CobolProgram";
FileAndSortDescriptionEntry fsde = GetFSDE(readStatement.Filename.Name);
//fsde.DataDescriptions is a list of items that the data should be read into
//Check for End of Stream...
r += " " + ILAddress(1) + "ldarg.0\n";
r += " " + ILAddress(5);
r += "ldfld class [mscorlib]System.IO.StreamReader "+className+"::_reader_"+ILIdentifier(readStatement.Filename.Name)+"\n";
r += " " + ILAddress(5);
r += "callvirt instance bool class [mscorlib]System.IO.StreamReader::get_EndOfStream()\n";
r += " " + ILAddress(5);
r += "brtrue "; //Jump to IsAtEndOfStream
string r2 = "";
//Execute NotEndStatements...
if (readStatement.NotEndStatements.Count>0)
{
foreach (Sentence sentence in readStatement.NotEndStatements)
{
r2 += EmitSentence(sentence);
}
}
//Read from file...
r2 += " " + ILAddress(1) + "ldarg.0\n";
r2 += " " + ILAddress(5);
r2 += "ldfld class [mscorlib]System.IO.StreamReader "+className+"::_reader_"+ILIdentifier(readStatement.Filename.Name)+"\n";
r2 += " " + ILAddress(5);
r2 += "callvirt instance string class [mscorlib]System.IO.StreamReader::ReadLine()\n";
Identifier id = new Identifier();
id.Definition = fsde.DataDescriptions[0] as DataDescription;
r2 += EmitStore(id,null);
//EmitStore calls EmitStoreGroup which needs to loop through the elements of a record.
//This should be changed to call ListElements like DISPLAY does.
//Jump to EndRead
r2 += " " + ILAddress(5);
r2 += "br ";
//If we're at the end of the stream, the first branch jumps to here
r+=ILAddress()+"\n";
//Execute NotEndStatements...
string r3 = "";
if (readStatement.EndStatements.Count>0)
{
foreach (Sentence sentence in readStatement.EndStatements)
{
r3 += EmitSentence(sentence);
}
}
//End Read
//The branch after reading data jumps to here
r2 += ILAddress() + "\n";
r+=r2;
r+=r3;
r+=" //End of read statement\n";
return r;
}
private string EmitWriteStatement(WriteStatement writeStatement)
{
string r = "\n //Begin write statement...\n";
//string r = "";
//throw new Compiler.Exceptions.NotImplementedException(
// writeStatement.LineNumber, "WRITE statement");
//Base this on EmitDisplayVerb rather than on the style that
//EmitReadStatement uses. EmitDisplayVerb and this should probably
//both call a common lower level method that works out what's to
//be dispayed or written to a file, and have a parameter that states
//whether or not it's being written to a file (and which file?) or
//if it's going to the screen.
r+= EmitOutputBase(null, writeStatement);
r+=" //End of write statement\n";
return r;
}
private string EmitDisplayVerb(DisplayVerb display)
{
return EmitOutputBase(display, null);
}
private string EmitOutputBase(DisplayVerb display, WriteStatement writeStatement)
{
string r = "";
string className = "__CobolProgram";
DataDescription dde = null;
//Build the format string and param types list...
string fmt = "";
int objects = 0;
ArrayList sources;
if (display!=null)
{
sources = display.Sources;
}else{
dde = GetDDEByName(writeStatement.RecordName.Name);
if (dde==null)
{
Console.WriteLine("dde is NULL");
}
r += " " + ILAddress(1) + "ldarg.0\n";
r += " " + ILAddress(5);
r += "ldfld class [mscorlib]System.IO.StreamWriter "+className+"::_writer_"+ILIdentifier(dde.FSDE.Name.Name)+"\n";
sources = new ArrayList();
if (writeStatement.RecordName!=null)
{
sources.Add(writeStatement.RecordName);
}
//TODO: What should be done when there are no FROM identifiers?
}
for (int i = 0; i < sources.Count; i++)
{
Source source = sources[i] as Source;
if (IsGroup(source))
{
Identifier id = source as Identifier;
List<DataDescription> ddes = ListElements(id.Definition);
foreach (DataDescription dd in ddes)
{
fmt += "{" + objects + ",-" + dd.Size + "}";
objects++;
}
}
else
{
//TODO:
//If the source specifies a substring, then that size should be used in the
//brackets rather than the definition's size. Simply using the definition's
//size breaks the 99 bottles output because the buffer variable is large
//and we only want one character from it.
//See testdisp.cbl and its output.
if (source.GetType()==typeof(Identifier))
{
Identifier id = source as Identifier;
if (id.UsesSubstring)
{
Console.WriteLine("UsesSubstring = true : "+id.Name);
fmt += "{" + objects + "}";
}
else
{
//Console.WriteLine("UsesSubstring = false : "+id.Name);
fmt += "{" + objects + ",-" + id.Definition.Size + "}";
}
}
else
{
fmt += "{" + objects + "}";
}
objects++;
}
}
//Load the format string...
r += " " + ILAddress(5);
r += "ldstr \"" + fmt + "\"\n";
//Create an array
r += " " + ILAddress(5);
r += "ldc.i4 " + objects + "\n";
r += " " + ILAddress(5);
r += "newarr [mscorlib]System.Object\n";
//Load the values...
int obj = 0;
foreach (Source source in sources)
{
if (IsGroup(source))
{
Identifier id = source as Identifier;
//Plan:
// 1. Load a format string based on all of the group element sizes (and types?)
// 2. Load each element
// 3. String.Format
// 4. Build an object array of the elements
// 5. Use the format string and array in WriteLine
List<DataDescription> ddes = ListElements(id.Definition);
foreach (DataDescription dd in ddes)
{
Identifier tmp = new Identifier();
tmp.Name = dd.Name;
tmp.Definition = dd;
r += " " + ILAddress(1) + "dup\n";
r += " " + ILAddress(5) + "ldc.i4 "+obj+"\n";
r += EmitLoadSource(tmp as Source, false, true);
r += " " + ILAddress(1) + "stelem.ref\n";
obj++;
}
}
else
{
r += " " + ILAddress(1) + "dup\n";
r += " " + ILAddress(5) + "ldc.i4 "+obj+"\n";
r += EmitLoadSource(source, false, true);
r += " " + ILAddress(1) + "stelem.ref\n";
obj++;
}
}
if (display!=null)
{
//Call Write or WriteLine...
r += " " + ILAddress(5);
string parms = "string, object[]";
if (display.NoAdvancing)
{
r += "call void class [mscorlib]System.Console::Write(" + parms + ")";
}else{
r += "call void class [mscorlib]System.Console::WriteLine(" + parms + ")";
}
r += "\n";
}else{
//Write...
r += " " + ILAddress(5);
r += "callvirt instance void class [mscorlib]System.IO.StreamWriter::WriteLine(string,object[])\n";
//Flush...
r += " " + ILAddress(1) + "ldarg.0\n";
r += " " + ILAddress(5);
r += "ldfld class [mscorlib]System.IO.StreamWriter "+className+"::_writer_"+ILIdentifier(dde.FSDE.Name.Name)+"\n";
r += " " + ILAddress(5);
r += "callvirt instance void class [mscorlib]System.IO.StreamWriter::Flush()\n";
}
return r;
}
private string EmitAcceptVerb(AcceptVerb accept)
{
string r = "";
string v = ILIdentifier(accept.Identifier.Name);
//TODO: Needs to work with floating point types...
//Console.WriteLine("accept = "+accept);
//Console.WriteLine("accept.Identifier = "+accept.Identifier);
//Console.WriteLine("accept.Identifier.Definition = "+accept.Identifier.Definition);
DataType type = accept.Identifier.Definition.Type;
//string typ = _program.GetVarType(v);
if (type == DataType.Integer)
{
r += " " + ILAddress(5);
r += "call string class [mscorlib]System.Console::ReadLine()";
r += "\n";
r += " " + ILAddress(1);
r += "stloc.1";
r += "\n";
//Now parse location 0 (__cobolInputTemp) and store in v
r += " " + ILAddress(1) + "ldarg.0\n";
r += " " + ILAddress(1) + "ldloc.1\n";
r += " " + ILAddress(5) + "call int32 int32::Parse(string)\n";
r += " ";
r += ILAddress(5) + "stfld int32 __CobolProgram::" + v;
r += "\n";
}
else
{
r += " ";
r += ILAddress(1) + "ldarg.0"; //Hidden pointer to 'this'
r += "\n";
r += " ";
r += ILAddress(5) + "call string class [mscorlib]System.Console::ReadLine()";
r += "\n";
r += " ";
r += ILAddress(5) + "stfld string __CobolProgram::" + v;
r += "\n";
if (IsGroup(accept.Identifier))
{
//TOOD: Set flag to indicate group is empty to true
// Then let EmitStore change it if necessary
r += " " + ILAddress(1) + "ldarg.0\n"; //Hidden pointer to 'this'
r += " " + ILAddress(1) + "ldc.i4.0\n"; //Zero, used for 'false'
r += " " + ILAddress(5) + "stfld bool __CobolProgram::_hasData_"+v+"\n";
//laod false _isEmpty_
r += " ";
r += ILAddress(1) + "ldarg.0"; //Hidden pointer to 'this'
r += "\n";
r += " ";
r += ILAddress(5) + "ldfld string __CobolProgram::" + v;
r += "\n";
r += EmitStore(accept.Identifier,null);
}
}
return r;
}
}
}
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