/// <summary>
/// processes the parse value state
/// </summary>
/// <param name="toProcess">the state to process</param>
/// <param name="current"></param>
/// <param name="index"></param>
private void ProcessParseValue(FileParsingState toProcess, char current, int index)
{
if (PrepComment(toProcess, current))
{
return;
}
if (char.IsWhiteSpace(current))
{
return;
}
switch (current)
{
case '"':
toProcess.State = FileParsingStateEnum.ParsingEscapedLeafValue;
break;
case '{':
toProcess.State = FileParsingStateEnum.ParsingNestedValue;
toProcess.ChildrenStartIndex = index + 1;
toProcess.BracketCount++;
break;
default:
toProcess.State = FileParsingStateEnum.ParsingLeafValue;
toProcess.ValueBuilder.Append(current);
break;
}
}
/// <summary>
/// processes a comment
/// </summary>
/// <param name="toProcess"></param>
/// <param name="current"></param>
/// <param name="index"></param>
private void ProcessComment(FileParsingState toProcess, char current, int index)
{
if (current == '\n' || current == '\r')
{
toProcess.State = toProcess.PreviousState;
}
}
/// <summary>
/// processes parsing the leaf value
/// </summary>
/// <param name="toProcess">the state to process</param>
/// <param name="current"></param>
/// <param name="index"></param>
private void ProcessParsingLeafValue(FileParsingState toProcess, char current, int index)
{
if (char.IsWhiteSpace(current))
{
toProcess.State = FileParsingStateEnum.Finished;
return;
}
toProcess.ValueBuilder.Append(current);
}
/// <summary>
/// processes parsing the escaped leaf value
/// </summary>
/// <param name="toProcess">the state to process</param>
/// <param name="current"></param>
/// <param name="index"></param>
private void ProcessParsingEscapedLeafValue(FileParsingState toProcess, char current, int index)
{
if (current == '"')
{
toProcess.State = FileParsingStateEnum.Finished;
return;
}
toProcess.ValueBuilder.Append(current);
}
/// <summary>
/// preps a comment if applicable
/// </summary>
/// <param name="toProcess"></param>
/// <param name="current"></param>
/// <returns>true if the character starts a comment and toProcess was successfully preped, false otherwise</returns>
private bool PrepComment(FileParsingState toProcess, char current)
{
if (current != '#')
{
return(false);
}
toProcess.PreviousState = toProcess.State;
toProcess.State = FileParsingStateEnum.Comment;
return(true);
}
private void ProcessParsingEscapedKey(FileParsingState toProcess, char current, int index)
{
if (current == '"')
{
toProcess.State = FileParsingStateEnum.EndKey;
}
else
{
toProcess.KeyBuilder.Append(current);
}
}
/// <summary>
/// processes the initial state
/// </summary>
/// <param name="toProcess">the state to process</param>
/// <param name="current">the current char</param>
/// <param name="index">the index</param>
private void ProcessInitialState(FileParsingState toProcess, char current, int index)
{
if (PrepComment(toProcess, current))
{
return;
}
if (current == '"')
{
toProcess.State = FileParsingStateEnum.ParsingEscapedKey;
return;
}
if (!char.IsWhiteSpace(current))
{
toProcess.KeyBuilder.Append(current);
toProcess.State = FileParsingStateEnum.ParsingKey;
}
}
/// <summary>
/// processes parsing the nested leaf value
/// </summary>
/// <param name="toProcess"></param>
/// <param name="current"></param>
/// <param name="index"></param>
private void ProcessParsingNestedValue(FileParsingState toProcess, char current, int index)
{
if (PrepComment(toProcess, current))
{
return;
}
if (current == '{')
{
toProcess.BracketCount++;
}
if (current == '}')
{
toProcess.BracketCount--;
}
if (toProcess.BracketCount == 0)
{
toProcess.State = FileParsingStateEnum.Finished;
toProcess.ChildrenIndexCount = index - toProcess.ChildrenStartIndex;
}
}
/// <summary>
/// processes the end key state
/// </summary>
/// <param name="toProcess">the state to process</param>
/// <param name="current">the current char</param>
/// <param name="index">the index</param>
private void ProcessEndKey(FileParsingState toProcess, char current, int index)
{
if (PrepComment(toProcess, current))
{
return;
}
if (char.IsWhiteSpace(current))
{
return;
}
if (current == '=')
{
toProcess.State = FileParsingStateEnum.ParseValue;
}
else
{
toProcess.State = FileParsingStateEnum.Finished;
toProcess.IncludeCurrentInNext = true;
}
}
/// <summary>
/// processes parsing the key
/// </summary>
/// <param name="toProcess">the state to process</param>
/// <param name="current">the current char</param>
/// <param name="index">the index</param>
private void ProcessParsingKey(FileParsingState toProcess, char current, int index)
{
if (PrepComment(toProcess, current))
{
return;
}
if (current == '=')
{
toProcess.State = FileParsingStateEnum.ParseValue;
return;
}
if (!char.IsWhiteSpace(current))
{
toProcess.KeyBuilder.Append(current);
}
else
{
toProcess.State = FileParsingStateEnum.EndKey;
}
}
/// <summary>
/// parse helper method
/// </summary>
/// <param name="parent"></param>
/// <param name="data"></param>
/// <param name="startIndex"></param>
/// <param name="count"></param>
/// <returns></returns>
private KeyValueNode ParseHelper(KeyValueNode parent, string data, int startIndex, int count)
{
var i = startIndex;
var currentNode = new FileParsingState();
while (i < startIndex + count)
{
var currentChar = data[i];
ProcessState(currentNode, currentChar, i);
if (currentNode.State != FileParsingStateEnum.Finished)
{
i++;
continue;
}
var nextNode = currentNode.BuildNode();
if (nextNode.IsLeaf)
{
parent[nextNode.Key] = nextNode;
}
else
{
var toAdd = ParseHelper(nextNode, data, currentNode.ChildrenStartIndex,
currentNode.ChildrenIndexCount);
parent[toAdd.Key] = toAdd;
}
var oldNode = currentNode;
currentNode = new FileParsingState();
if (oldNode.IncludeCurrentInNext)
{
if (currentChar == '"')
{
currentNode.State = FileParsingStateEnum.ParsingEscapedKey;
}
else
{
currentNode.State = FileParsingStateEnum.ParsingKey;
currentNode.KeyBuilder.Append(currentChar);
}
}
i++;
}
//this cleanup code handles case where non whitespace char is directly against closing bracket
var lastNode = currentNode.BuildNode();
if (!string.IsNullOrWhiteSpace(lastNode.Key))
{
if (!parent.Children.ContainsKey(lastNode.Key))
{
parent.Children[lastNode.Key] = new List <KeyValueNode>();
}
if (currentNode.State != FileParsingStateEnum.Initial && !parent.Children[lastNode.Key].Contains(lastNode))
{
parent.Children[lastNode.Key].Add(lastNode);
}
}
return(parent);
}
/// <summary>
/// processes the state
/// </summary>
/// <param name="toProcess">the state to process</param>
/// <param name="current">the current char to process</param>
/// <param name="index">the index</param>
private void ProcessState(FileParsingState toProcess, char current, int index)
{
Parsers[toProcess.State](toProcess, current, index);
}
