public static int Run(string[] args, TextReader stdin, TextWriter stdout, TextWriter stderr)
{
// our return code
var result = 0;
// app parameters
string inputfile = null;
string outputfile = null;
string codeclass = null;
string codelanguage = null;
string codenamespace = null;
string externaltoken = null;
string nfagraph = null;
string dfagraph = null;
bool ignorecase = false;
bool noshared = false;
bool ifstale = false;
// our working variables
TextReader input = null;
TextWriter output = null;
try
{
if (0 == args.Length)
{
_PrintUsage(stderr);
result = -1;
}
else if (args[0].StartsWith("/"))
{
throw new ArgumentException("Missing input file.");
}
else
{
// process the command line args
inputfile = args[0];
for (var i = 1; i < args.Length; ++i)
{
switch (args[i].ToLowerInvariant())
{
case "/output":
if (args.Length - 1 == i) // check if we're at the end
{
throw new ArgumentException(string.Format("The parameter \"{0}\" is missing an argument", args[i].Substring(1)));
}
++i; // advance
outputfile = args[i];
break;
case "/class":
if (args.Length - 1 == i) // check if we're at the end
{
throw new ArgumentException(string.Format("The parameter \"{0}\" is missing an argument", args[i].Substring(1)));
}
++i; // advance
codeclass = args[i];
break;
case "/language":
if (args.Length - 1 == i) // check if we're at the end
{
throw new ArgumentException(string.Format("The parameter \"{0}\" is missing an argument", args[i].Substring(1)));
}
++i; // advance
codelanguage = args[i];
break;
case "/namespace":
if (args.Length - 1 == i) // check if we're at the end
{
throw new ArgumentException(string.Format("The parameter \"{0}\" is missing an argument", args[i].Substring(1)));
}
++i; // advance
codenamespace = args[i];
break;
case "/external":
if (args.Length - 1 == i) // check if we're at the end
{
throw new ArgumentException(string.Format("The parameter \"{0}\" is missing an argument", args[i].Substring(1)));
}
++i; // advance
externaltoken = args[i];
break;
case "/nfagraph":
if (args.Length - 1 == i) // check if we're at the end
{
throw new ArgumentException(string.Format("The parameter \"{0}\" is missing an argument", args[i].Substring(1)));
}
++i; // advance
nfagraph = args[i];
break;
case "/dfagraph":
if (args.Length - 1 == i) // check if we're at the end
{
throw new ArgumentException(string.Format("The parameter \"{0}\" is missing an argument", args[i].Substring(1)));
}
++i; // advance
dfagraph = args[i];
break;
case "/ignorecase":
ignorecase = true;
break;
case "/noshared":
noshared = true;
break;
case "/ifstale":
ifstale = true;
break;
default:
throw new ArgumentException(string.Format("Unknown switch {0}", args[i]));
}
}
// now build it
if (string.IsNullOrEmpty(codeclass))
{
// default we want it to be named after the code file
// otherwise we'll use inputfile
if (null != outputfile)
{
codeclass = Path.GetFileNameWithoutExtension(outputfile);
}
else
{
codeclass = Path.GetFileNameWithoutExtension(inputfile);
}
}
if (string.IsNullOrEmpty(codelanguage))
{
if (!string.IsNullOrEmpty(outputfile))
{
codelanguage = Path.GetExtension(outputfile);
if (codelanguage.StartsWith("."))
{
codelanguage = codelanguage.Substring(1);
}
}
if (string.IsNullOrEmpty(codelanguage))
{
codelanguage = "cs";
}
}
var stale = true;
if (ifstale && null != outputfile)
{
stale = _IsStale(inputfile, outputfile);
if (!stale)
{
stale = _IsStale(CodeBase, outputfile);
}
}
if (!stale)
{
stderr.WriteLine("{0} skipped building {1} because it was not stale.", Name, outputfile);
}
else
{
if (null != outputfile)
{
stderr.Write("{0} is building file: {1}", Name, outputfile);
}
else
{
stderr.Write("{0} is building tokenizer.", Name);
}
input = new StreamReader(inputfile);
var rules = new List <LexRule>();
string line;
while (null != (line = input.ReadLine()))
{
var lc = LexContext.Create(line);
lc.TrySkipCCommentsAndWhiteSpace();
if (-1 != lc.Current)
{
rules.Add(LexRule.Parse(lc));
}
}
input.Close();
input = null;
LexRule.FillRuleIds(rules);
var ccu = new CodeCompileUnit();
var cns = new CodeNamespace();
if (!string.IsNullOrEmpty(codenamespace))
{
cns.Name = codenamespace;
}
ccu.Namespaces.Add(cns);
var fa = _BuildLexer(rules, ignorecase, inputfile);
var symbolTable = _BuildSymbolTable(rules);
var symids = new int[symbolTable.Length];
for (var i = 0; i < symbolTable.Length; ++i)
{
symids[i] = i;
}
var blockEnds = _BuildBlockEnds(rules);
var nodeFlags = _BuildNodeFlags(rules);
if (null != nfagraph)
{
fa.RenderToFile(nfagraph);
}
fa = fa.ToDfa();
DfaEntry[] dfaTable = null;
dfaTable = _ToDfaStateTable(fa, symids);
if (!noshared)
{
if (string.IsNullOrEmpty(externaltoken))
{
// import our Export/Token.cs into the library
_ImportCompileUnit(Deslanged.Token, cns);
}
// import our Export/TableTokenizer.cs into the library
_ImportCompileUnit(Deslanged.TableTokenizer, cns);
}
if (!string.IsNullOrEmpty(externaltoken))
{
cns.Imports.Add(new CodeNamespaceImport(externaltoken));
}
var origName = "Rolex.";
CodeTypeDeclaration td = null;
if (null == td)
{
td = Deslanged.TableTokenizerTemplate.Namespaces[1].Types[0];
origName += td.Name;
td.Name = codeclass;
CodeGenerator.GenerateSymbolConstants(td, symbolTable);
}
CodeDomVisitor.Visit(td, (ctx) =>
{
var tr = ctx.Target as CodeTypeReference;
if (null != tr)
{
if (0 == string.Compare(origName, tr.BaseType, StringComparison.InvariantCulture))
{
tr.BaseType = codeclass;
}
}
});
CodeMemberField f = null;
f = CodeDomUtility.GetByName("DfaTable", td.Members) as CodeMemberField;
f.InitExpression = CodeGenerator.GenerateDfaTableInitializer(dfaTable);
f = CodeDomUtility.GetByName("NodeFlags", td.Members) as CodeMemberField;
f.InitExpression = CodeDomUtility.Literal(nodeFlags);
f = CodeDomUtility.GetByName("BlockEnds", td.Members) as CodeMemberField;
f.InitExpression = CodeDomUtility.Literal(blockEnds);
cns.Types.Add(td);
var hasColNS = false;
foreach (CodeNamespaceImport nsi in cns.Imports)
{
if (0 == string.Compare(nsi.Namespace, "System.Collections.Generic", StringComparison.InvariantCulture))
{
hasColNS = true;
break;
}
}
if (!hasColNS)
{
cns.Imports.Add(new CodeNamespaceImport("System.Collections.Generic"));
}
stderr.WriteLine();
var prov = CodeDomProvider.CreateProvider(codelanguage);
var opts = new CodeGeneratorOptions();
opts.BlankLinesBetweenMembers = false;
opts.VerbatimOrder = true;
if (null == outputfile)
{
output = stdout;
}
else
{
// open the file and truncate it if necessary
var stm = File.Open(outputfile, FileMode.Create);
stm.SetLength(0);
output = new StreamWriter(stm);
}
prov.GenerateCodeFromCompileUnit(ccu, output, opts);
}
}
}
// we don't like to catch in debug mode
#if !DEBUG
catch (Exception ex)
{
result = _ReportError(ex, stderr);
}
#endif
finally
{
// close the input file if necessary
if (null != input)
{
input.Close();
}
// close the output file if necessary
if (null != outputfile && null != output)
{
output.Close();
}
}
return(result);
}
static void Demo()
{
// note that in the real world cases, you'd need to use SlangPatcher.Patch()
// on whole compile units to get proper codedom objects back. This method is
// simply "close enough for government work" and may not work for languages
// other than VB
while (true)
{
Console.Write("Slang>");
var s = Console.ReadLine();
if (null != s)
{
s = s.Trim();
}
if (string.IsNullOrEmpty(s))
{
break;
}
var isStatement = s.EndsWith(";") || s.EndsWith("}");
CodeObject co = null;
try
{
if (isStatement)
{
co = SlangParser.ParseStatement(s, true);
}
else
{
co = SlangParser.ParseExpression(s);
}
}
catch (SlangSyntaxException ex)
{
Console.WriteLine("Error: " + ex.Message);
}
if (null != co)
{
var ccu = _RootCode(co);
try
{
SlangPatcher.Patch(ccu);
}
catch (Exception ex)
{
Console.WriteLine("Warning: Error resolving code - " + ex.Message);
}
var tc = new CodeDomTypeConverter();
var item = (ccu.Namespaces[0].Types[0].Members[0] as CodeMemberMethod).Statements[0];
if (!isStatement)
{
co = item;
var es = item as CodeExpressionStatement;
if (null != es)
{
co = es.Expression;
}
}
else
{
co = item;
}
s = CodeDomUtility.ToString(co);
s = s.Trim();
Console.Write("C#: ");
Console.WriteLine(s);
s = CodeDomUtility.ToString(co, "vb");
s = s.Trim();
Console.Write("VB: ");
Console.WriteLine(s);
s = CodeDomUtility.ToString(CodeDomUtility.Literal(co, tc));
s = s.Trim();
Console.Write("CodeDom: ");
Console.WriteLine(s);
if (null != SlangPatcher.GetNextUnresolvedElement(ccu))
{
Console.WriteLine("Warning: Not all of the code could be resolved.");
}
}
}
}
static void _GenerateSymbolConstants(CodeTypeDeclaration target, IList <string> symbolTable)
{
// generate symbol constants
for (int ic = symbolTable.Count, i = 0; i < ic; ++i)
{
var symbol = symbolTable[i];
if (null != symbol)
{
var s = _MakeSafeName(symbol);
s = _MakeUniqueMember(target, s);
var constField = CodeDomUtility.Field(typeof(int), s, MemberAttributes.Const | MemberAttributes.Public, CodeDomUtility.Literal(i));
target.Members.Add(constField);
}
}
}