public LfdLine(LfdLine parent, String comment, UInt32 actualLineNumber)
{
this.parent = parent;
this.id = comment;
this.fields = null;
this.comment = true;
this.actualLineNumber = actualLineNumber;
}
public override void Handle(LfdLine lfdLine)
{
if (lfdLine.fields == null)
{
throw new FormatException(String.Format("Option '{0}' requires at least one field but got none", name));
}
for (int i = 0; i < lfdLine.fields.Length; i++)
{
strings.Add(lfdLine.fields[i]);
}
}
public override void Handle(LfdLine lfdLine)
{
if (value)
{
throw new FormatException(String.Format("The '{0}' config option appeared more than once", name));
}
if (lfdLine.fields != null)
{
throw new FormatException(String.Format(
"The '{0}' config option may not have any arguments", name));
}
value = true;
}
public LfdLine(LfdLine parent, String id, String[] fields, UInt32 actualLineNumber)
{
if (id == null)
{
throw new ArgumentNullException("id");
}
this.parent = parent;
this.id = id;
this.fields = fields;
this.comment = false;
this.actualLineNumber = actualLineNumber;
}
public override void Handle(LfdLine lfdLine)
{
if (strings != null)
{
throw new FormatException(String.Format("The '{0}' config option appeared more than once", name));
}
if (lfdLine.fields == null)
{
strings = new String[0];
}
else
{
strings = lfdLine.fields;
}
}
public override void Handle(LfdLine lfdLine)
{
if (value != null)
{
throw new FormatException(String.Format("The '{0}' config option appeared more than once", name));
}
if (lfdLine.fields == null)
{
throw new FormatException(
String.Format("The '{0}' config option requires a single argument", name));
}
if (lfdLine.fields.Length > 1)
{
throw new FormatException(
String.Format("The '{0}' config option can have at most 1 argument but it has {1}", name, lfdLine.fields.Length));
}
this.value = lfdLine.fields[0];
}
public LfdLine ReadLine()
{
while (true)
{
String line = readLineDelegate();
if (line == null)
{
return(null);
}
lineNumber++;
//
// Identify line
//
for (int offset = 0; true; offset++)
{
// Empty Line
if (offset >= line.Length)
{
break;
}
if (Char.IsWhiteSpace(line[offset]))
{
continue;
}
//
// If the first character is a '#' then the line is a comment
if (line[offset] == '#')
{
return(new LfdLine((context.Count > 0) ? context.Peek() : null, line, lineNumber));
}
//
// If the first character is '}' then the line must be a BLOCK_END line
//
if (line[offset] == '}')
{
// Verify whitespace till end of line
while (true)
{
offset++;
if (offset >= line.Length)
{
break;
}
if (!Char.IsWhiteSpace(line[offset]))
{
throw FormatError(line, "Line starting with '}' must be followed by only whitespace");
}
}
if (context.Count <= 0)
{
throw FormatError(line, "The block end '}' had no matching block begin");
}
context.Pop();
break;
}
//
// '{' and '"' are invalid characters to start a line
//
if (line[offset] == '{' || line[offset] == '"')
{
throw FormatError(line, "A line cannot start with '{0}'", line[offset]);
}
if (line[offset] == '\\')
{
// verify whitespace till end
while (true)
{
offset++;
if (offset >= line.Length)
{
line = readLineDelegate();
if (line == null)
{
return(null);
}
offset = 0;
lineNumber++;
break;
}
if (!Char.IsWhiteSpace(line[offset]))
{
throw FormatError(line, "The '\\' character cannot have non whitespace after it");
}
}
continue;
}
//
// Get the line id
//
Int32 saveOffset = offset;
while (true)
{
offset++;
if (offset >= line.Length)
{
return(new LfdLine((context.Count > 0) ? context.Peek() : null,
line.Substring(saveOffset), null, lineNumber));
}
if (line[offset] == '{')
{
String lineIdSpecialCase = line.Substring(saveOffset, offset - saveOffset);
//verify whitespace till the end
while (true)
{
offset++;
if (offset >= line.Length)
{
break;
}
if (!Char.IsWhiteSpace(line[offset]))
{
throw FormatError(line, "The '{' character just after the line Id can only be followed by whitespace");
}
}
LfdLine newLine = new LfdLine((context.Count > 0) ? context.Peek() : null,
lineIdSpecialCase, null, lineNumber);
context.Push(newLine);
return(newLine);
}
if (Char.IsWhiteSpace(line[offset]))
{
break;
}
}
String lineId = line.Substring(saveOffset, offset - saveOffset);
// Skip whitespace until you get to the first field (or end of line)
while (true)
{
offset++;
if (offset >= line.Length)
{
return(new LfdLine((context.Count > 0) ? context.Peek() : null,
lineId, null, lineNumber));
}
if (!Char.IsWhiteSpace(line[offset]))
{
break;
}
}
//
// Get all fields in the line
//
List <String> fields = new List <String>();
while (true)
{
Int32 fieldStart = offset;
//
// A quoted field
//
if (line[offset] == '"')
{
fieldStart++;
Boolean continueLoop = false;
while (true)
{
offset++;
if (offset >= line.Length)
{
throw FormatError(line, "Found a quoted field without an ending quote");
}
if (line[offset] == '"')
{
if (line[offset - 1] != '\\')
{
fields.Add(line.Substring(fieldStart, offset - fieldStart));
offset++;
break;
}
else
{
continueLoop = true;
break;
}
}
}
//
// If there is an escaped quote in the string, then the rest of the characters
// must be added to a new string to remove any extra backslashes
//
if (continueLoop)
{
StringBuilder builder = new StringBuilder(line.Substring(fieldStart, offset - 1 - fieldStart));
builder.Append('"');
while (true)
{
offset++;
if (offset >= line.Length)
{
throw FormatError(line, "Found a quoted field without an ending quote");
}
if (line[offset] == '"')
{
fields.Add(builder.ToString());
offset++;
break;
}
if (line[offset] == '\\')
{
offset++;
if (offset >= line.Length)
{
throw FormatError(line, "Line ended with '\\' but was in the middle of a quote");
}
if (line[offset] == '\\')
{
builder.Append('\\');
}
else if (line[offset] == '"')
{
builder.Append('"');
}
else
{
throw FormatError(line, "Unrecognized escape character '{0}', expected '\"' or '\\'", line[offset]);
}
}
else
{
builder.Append(line[offset]);
}
}
}
}
//
// An Open Brace field which must be the last field
//
else if (line[offset] == '{')
{
//verify whitespace till the end
while (true)
{
offset++;
if (offset >= line.Length)
{
break;
}
if (!Char.IsWhiteSpace(line[offset]))
{
throw FormatError(line, "A Field starting with the '{' character can only be followed by whitespace unless escaped with '\\{'");
}
}
LfdLine newLine = new LfdLine((context.Count > 0) ? context.Peek() : null,
lineId, fields.ToArray(), lineNumber);
context.Push(newLine);
return(newLine);
}
//
// An escape character '\' used for starting fields with the '{' character
// and continuing the fields on the next line
//
else if (line[offset] == '\\')
{
offset++;
if (offset >= line.Length)
{
line = readLineDelegate();
if (line == null)
{
return(null);
}
offset = 0;
lineNumber++;
}
else
{
if (line[offset] == '{')
{
fieldStart++;
while (true)
{
offset++;
if (offset >= line.Length)
{
fields.Add(line.Substring(fieldStart));
return(new LfdLine((context.Count > 0) ? context.Peek() : null,
lineId, fields.ToArray(), lineNumber));
}
if (Char.IsWhiteSpace(line[offset]))
{
fields.Add(line.Substring(fieldStart, offset - fieldStart));
break;
}
}
}
else
{
while (true)
{
offset++;
if (offset >= line.Length)
{
line = readLineDelegate();
if (line == null)
{
return(null);
}
offset = 0;
lineNumber++;
break;
}
if (!Char.IsWhiteSpace(line[offset]))
{
throw FormatError(line, "The '\\' character cannot have non whitespace after it");
}
}
}
}
}
//
// A normal field that ends when whitespace is encountered
//
else
{
while (true)
{
offset++;
if (offset >= line.Length)
{
fields.Add(line.Substring(fieldStart));
return(new LfdLine((context.Count > 0) ? context.Peek() : null,
lineId, fields.ToArray(), lineNumber));
}
if (Char.IsWhiteSpace(line[offset]))
{
fields.Add(line.Substring(fieldStart, offset - fieldStart));
break;
}
}
}
//
// Skip whitespace, or return a line if the end of line is found
//
while (true)
{
if (offset >= line.Length)
{
return(new LfdLine((context.Count > 0) ? context.Peek() : null,
lineId, fields.ToArray(), lineNumber));
}
if (!Char.IsWhiteSpace(line[offset]))
{
break;
}
offset++;
}
}
}
}
}
void Test(String lfdText, params ExpectedLine[] expectedLines)
{
//
// Test using LfdReader
//
using (var reader = new LfdTextReader(new StringReader(lfdText)))
{
for (int i = 0; i < expectedLines.Length; i++)
{
var line = reader.ReadLine();
Assert.AreEqual(expectedLines[i].id, line.id);
if (expectedLines[i].fields == null || expectedLines[i].fields.Length == 0)
{
Assert.IsNull(line.fields);
}
else
{
Assert.AreEqual(expectedLines[i].fields.Length, line.fields.Length);
for (int fieldIndex = 0; fieldIndex < line.fields.Length; fieldIndex++)
{
Assert.AreEqual(expectedLines[i].fields[fieldIndex], line.fields[fieldIndex]);
}
}
}
Assert.IsNull(reader.ReadLine());
}
Byte[] linesAsBytes = Encoding.UTF8.GetBytes(lfdText);
//
// Test using LineParser
//
for (uint initialBufferSize = 1; initialBufferSize <= lfdText.Length; initialBufferSize++)
{
OffsetLineParser lineParser = new OffsetLineParser(new ByteArrayReference(initialBufferSize));
lineParser.Add(linesAsBytes, linesAsBytes.Length);
List <String> fields = new List <String>();
Byte[] lineBuffer;
Int32 lineOffset = 0, lineLength = 0;
for (int i = 0; i < expectedLines.Length; i++)
{
do
{
lineBuffer = lineParser.GetLine(ref lineOffset, ref lineLength);
Assert.IsNotNull(lineBuffer);
fields.Clear();
LfdLine.ParseLine(fields, lineBuffer, lineOffset, lineOffset + lineLength);
} while (fields.Count == 0);
Assert.AreEqual(expectedLines[i].id, fields[0]);
if (expectedLines[i].fields == null || expectedLines[i].fields.Length == 0)
{
Assert.AreEqual(1, fields.Count);
}
else
{
Assert.AreEqual(expectedLines[i].fields.Length, fields.Count - 1);
for (int fieldIndex = 0; fieldIndex < fields.Count - 1; fieldIndex++)
{
Assert.AreEqual(expectedLines[i].fields[fieldIndex], fields[fieldIndex + 1]);
}
}
}
Assert.IsNull(lineParser.GetLine(ref lineOffset, ref lineLength));
}
}
public void GenericTestMethod()
{
StringBuilder builder = new StringBuilder();
builder.AppendLine("");
builder.AppendLine("LineWithNoValues \t ");
builder.AppendLine("Line1Fields \t field1 \t\t");
builder.AppendLine("Line2Fields \t field1 \t\tfield2 ");
builder.AppendLine("LineFieldWithWhitespace \t\t \t \"this ; is a long field\" \t");
builder.AppendLine("LineWithEmptyFields \t\t\"\" \"\" \t");
using (var reader = new LfdTextReader(new StringReader(builder.ToString())))
{
LfdLine line = reader.ReadLine();
Assert.AreEqual("LineWithNoValues", line.id);
line = reader.ReadLine();
Assert.AreEqual("Line1Fields", line.id);
Assert.AreEqual("field1", line.fields[0]);
line = reader.ReadLine();
Assert.AreEqual("Line2Fields", line.id);
Assert.AreEqual("field1", line.fields[0]);
Assert.AreEqual("field2", line.fields[1]);
line = reader.ReadLine();
Assert.AreEqual("LineFieldWithWhitespace", line.id);
Assert.AreEqual("this ; is a long field", line.fields[0]);
line = reader.ReadLine();
Assert.AreEqual("LineWithEmptyFields", line.id);
Assert.AreEqual(String.Empty, line.fields[0]);
Assert.AreEqual("", line.fields[1]);
Assert.IsNull(reader.ReadLine());
}
//
// Test using line parser
//
OffsetLineParser lineParser = new OffsetLineParser(new ByteArrayReference(1));
Byte[] linesAsBytes = Encoding.UTF8.GetBytes(builder.ToString());
lineParser.Add(linesAsBytes, linesAsBytes.Length);
List <String> fields = new List <String>();
Byte[] lineBuffer;
Int32 lineOffset = 0, lineLength = 0;
lineBuffer = lineParser.GetLine(ref lineOffset, ref lineLength);
LfdLine.ParseLine(fields, lineBuffer, lineOffset, lineOffset + lineLength);
Assert.AreEqual(0, fields.Count);
fields.Clear();
lineBuffer = lineParser.GetLine(ref lineOffset, ref lineLength);
LfdLine.ParseLine(fields, lineBuffer, lineOffset, lineOffset + lineLength);
Assert.AreEqual("LineWithNoValues", fields[0]);
fields.Clear();
lineBuffer = lineParser.GetLine(ref lineOffset, ref lineLength);
LfdLine.ParseLine(fields, lineBuffer, lineOffset, lineOffset + lineLength);
Assert.AreEqual("Line1Fields", fields[0]);
Assert.AreEqual("field1", fields[1]);
fields.Clear();
lineBuffer = lineParser.GetLine(ref lineOffset, ref lineLength);
LfdLine.ParseLine(fields, lineBuffer, lineOffset, lineOffset + lineLength);
Assert.AreEqual("Line2Fields", fields[0]);
Assert.AreEqual("field1", fields[1]);
Assert.AreEqual("field2", fields[2]);
fields.Clear();
lineBuffer = lineParser.GetLine(ref lineOffset, ref lineLength);
LfdLine.ParseLine(fields, lineBuffer, lineOffset, lineOffset + lineLength);
Assert.AreEqual("LineFieldWithWhitespace", fields[0]);
Assert.AreEqual("this ; is a long field", fields[1]);
fields.Clear();
lineBuffer = lineParser.GetLine(ref lineOffset, ref lineLength);
LfdLine.ParseLine(fields, lineBuffer, lineOffset, lineOffset + lineLength);
Assert.AreEqual("LineWithEmptyFields", fields[0]);
fields.Clear();
}
public abstract void Handle(LfdLine lfdLine);
