private static int grepText(string szFile, string szText, string szRegex, GrepOpts go, bool bMultiFile)
{
int ret = 0;
if (validString(szText) && validString(szRegex))
{
string[] aszLines = szText.Split(new char[] { '\n' });
int nLines = (aszLines == null?0:aszLines.Length);
bool bWroteFilename = false, bNeedNL = false;
if (nLines > 0)
{
Match m;
RegexOptions ro = go.ignoreCase?RegexOptions.IgnoreCase:RegexOptions.None;
for (int i = 0; i < nLines; i++)
{
if ((m = Regex.Match(aszLines[i], szRegex, ro)) != Match.Empty)
{
ret++;
if (bMultiFile || go.fileName)
{
if (!bWroteFilename)
{
bWroteFilename = true;
Console.WriteLine("file {0}:{1}", szFile, go.extraLine?"\n":"");
}
}
if (go.lineNumbers && !go.fileName)
{
Console.Write("{0}:", i);
}
if (!(go.fileName && go.lineNumbers))
{
Console.WriteLine(aszLines[i]);
bNeedNL = true;
}
}
}
if (/*go.extraLine && */ ret > 0 && bNeedNL)
{
Console.WriteLine();
}
}
}
else
{
if (!validString(szText))
{
Console.Error.WriteLine("file {0} is empty?", szFile);
}
if (!validString(szRegex))
{
Console.Error.WriteLine("invalid regex here");
}
// Console.Error.WriteLine("invalid string or regexp here!");
}
return(ret);
}
private static int grepStuff(string szRegex, string szFileDesc, GrepOpts go)
{
int ret = 0;
string szPath, szWildcard;
Trace.WriteLine(string.Format("regex='{0}', filedes='{1}'", szRegex, szFileDesc));
if (splitFileDescription(szFileDesc, out szPath, out szWildcard))
{
if (Directory.Exists(szPath))
{
string[] files = Directory.GetFiles(szPath, szWildcard);
if (files == null)
{
Console.Error.WriteLine("{0}: no files matching '{1}'.", szPath, szWildcard);
}
else
{
foreach (string szFile in files)
{
ret += doGrep(szFile, szRegex, go, files.Length > 1);
}
}
}
else
{
Console.Error.WriteLine("Directory {0} does not exist!", szPath);
}
}
return(ret);
}
private static int doGrep(string szFile, string szRegex, GrepOpts go, bool bMultiFile)
{
int ret = 0;
StreamReader sr = null;
try {
sr = new StreamReader(szFile);
} catch (Exception ex) {
Console.Error.WriteLine("StreamReader({0}) failed [{1}]!",
szFile, ex.Message);
}
if (sr != null)
{
string szContent = sr.ReadToEnd();
// go.fileName=szFile;
sr.Close();
ret = grepText(szFile, szContent, szRegex, go, bMultiFile);
}
return(ret);
}
// entry-point comment
/// entry-point comment
public static void Main(string[] args)
{
int nArgs, nExitCode;
bool bShowUsage, bShowVersion, bTrace;
GrepOpts go;
go = new GrepOpts();
nArgs = args == null?0:args.Length;
nExitCode = 0;
bShowUsage = false;
bShowVersion = false;
bTrace = false;
if (nArgs > 0)
{
int c;
while ((c = GetOpt.getopt(args, "hilntv?")) >= 0)
{
switch (c)
{
case 'i': go.ignoreCase = true; break;
case 'l': go.lineNumbers = true; break;
case 'n': go.fileName = true; break;
case 'v': bShowVersion = !bShowVersion; break;
case 't': bTrace = true; break;
case 'x': go.extraLine = true; break;
case 'h':
case '?': nExitCode = 0; bShowUsage = true; break;
default:
nExitCode = 1;
bShowUsage = true;
break;
}
}
}
if (bShowUsage)
{
usage(nExitCode);
}
else
{
if (GetOpt.optind >= nArgs)
{
usage(1);
}
else
{
string szRegex;
int i, nFound = 0;
#if TRACE
TextWriterTraceListener twtl;
twtl = null;
Trace.AutoFlush = true;
if (bTrace)
{
try {
twtl = new TextWriterTraceListener(Console.Error);
Trace.Listeners.Add(twtl);
} catch (Exception ex) {
Console.Error.WriteLine("{0}\n{1}{2}\n{3}",
ex.GetType().FullName,
ex.Message,
ex.InnerException == null?string.Empty:" [" + ex.InnerException.Message + "]",
ex.StackTrace);
}
}
#endif
if (bShowVersion)
{
Console.WriteLine(buildDisplayString(Assembly.GetExecutingAssembly()));
}
i = GetOpt.optind;
szRegex = args[i++];
if (i >= nArgs)
{
Console.Error.WriteLine("reading 'stdin' for regex['{0}'].", szRegex);
nFound = grepText("stdin", Console.In.ReadToEnd(), szRegex, go, false);
nExitCode = nFound > 0?0:2;
}
else
{
for (; i < nArgs; i++)
{
nFound += grepStuff(szRegex, args[i], go);
}
nExitCode = nFound > 0?0:2;
}
#if TRACE
if (bTrace)
{
if (twtl != null)
{
twtl.Flush();
Trace.Listeners.Remove(twtl);
}
}
#endif
}
}
Environment.Exit(nExitCode);
}