public static IEnumerable <string> Lines(this TextReader self, TextReaderCodaOptions options)
{
Check.Self(self);
CheckOptions(options);
return(CreateLineIterator(self, options));
}
private static void CheckOptions(TextReaderCodaOptions options)
{
if (options != TextReaderCodaOptions.None && options != TextReaderCodaOptions.CloseReader)
{
throw new ArgumentException("options", "Invalid `options' value.");
}
}
private static IEnumerable <string> CreateTokensIterator(TextReader self, TextReaderCodaOptions options, Func <char?, char, bool>[] categories)
{
try
{
var cats = categories.Select(
c => Lambda.F((StringBuilder buf, char ch) =>
c(buf.Length == 0 ? ((char?)null) : (char?)buf[buf.Length - 1], ch)));
foreach (var t in Chars(self).Tokens(
new StringBuilder(),
(buf, c) => buf.Append(c),
buf =>
{
var r = buf.ToString();
buf.Length = 0;
return(Tuple.Create(r, buf));
},
cats.ToArray()))
{
yield return(t);
}
}
finally
{
if ((options & TextReaderCodaOptions.CloseReader) != 0)
{
self.Close();
self.Dispose();
}
}
}
public static IEnumerable <string> Words(this TextReader self, TextReaderCodaOptions options)
{
Check.Self(self);
CheckOptions(options);
return(Tokens(self, options, (p, c) => !char.IsWhiteSpace(c)));
}
public static IEnumerable<string> Lines(this TextReader self, TextReaderCodaOptions options)
{
Check.Self (self);
CheckOptions (options);
return CreateLineIterator (self, options);
}
public static IEnumerable<string> Tokens(this TextReader self, TextReaderCodaOptions options, params Func<char?, char, bool>[] categories)
{
Check.Self (self);
CheckOptions (options);
Check.Categories (categories);
if (categories.Length == 0)
throw new ArgumentException ("categories", "Must provide at least one catagory");
return CreateTokensIterator (self, options, categories);
}
public static IEnumerable <string> Tokens(this TextReader self, TextReaderCodaOptions options, params Func <char?, char, bool>[] categories)
{
Check.Self(self);
CheckOptions(options);
Check.Categories(categories);
if (categories.Length == 0)
{
throw new ArgumentException("categories", "Must provide at least one catagory");
}
return(CreateTokensIterator(self, options, categories));
}
private static IEnumerable <string> CreateLineIterator(TextReader self, TextReaderCodaOptions options)
{
try {
string line;
while ((line = self.ReadLine()) != null)
{
yield return(line);
}
} finally {
if ((options & TextReaderCodaOptions.CloseReader) != 0)
{
self.Close();
self.Dispose();
}
}
}
public static IEnumerable<string> Words(this TextReader self, TextReaderCodaOptions options)
{
Check.Self (self);
CheckOptions (options);
return Tokens (self, options, (p, c) => !char.IsWhiteSpace (c));
}
private static IEnumerable<string> CreateTokensIterator(TextReader self, TextReaderCodaOptions options, Func<char?, char, bool>[] categories)
{
try {
var cats = categories.Select (
c => Lambda.F ((StringBuilder buf, char ch) =>
c (buf.Length == 0 ? ((char?) null) : (char?) buf [buf.Length-1], ch)));
foreach (var t in Chars (self).Tokens (
new StringBuilder (),
(buf, c) => buf.Append (c),
buf => {
var r = buf.ToString ();
buf.Length = 0;
return Tuple.Create (r, buf);
},
cats.ToArray ()))
yield return t;
} finally {
if ((options & TextReaderCodaOptions.CloseReader) != 0) {
self.Close ();
self.Dispose ();
}
}
}
private static IEnumerable<string> CreateLineIterator(TextReader self, TextReaderCodaOptions options)
{
try {
string line;
while ((line = self.ReadLine ()) != null)
yield return line;
} finally {
if ((options & TextReaderCodaOptions.CloseReader) != 0) {
self.Close ();
self.Dispose ();
}
}
}
private static void CheckOptions(TextReaderCodaOptions options)
{
if (options != TextReaderCodaOptions.None && options != TextReaderCodaOptions.CloseReader)
throw new ArgumentException ("options", "Invalid `options' value.");
}
