//#################### PUBLIC METHODS ####################
#region
/// <summary>
/// Computes line count metrics for the specified input text.
/// </summary>
/// <param name="input">The input text for which to compute line count metrics.</param>
/// <returns>The computed metrics.</returns>
public static LineCounts ComputeLineCounts(string input)
{
var counts = new LineCounts();
var context = new Context();
char?cur, prev = null;
while ((cur = GetNext(input, context)) != null)
{
if (IsNewLine(cur))
{
RegisterNewLine(counts, context);
cur = null;
}
else if (cur == '*' && prev == '/')
{
ReadMultiLineComment(input, counts, context);
cur = null;
}
else if (cur == '/' && prev == '/')
{
ReadEOLComment(input, context);
context.HasComment = true;
cur = null;
}
else if (cur == '"')
{
ReadRestOfString(input, context);
context.HasCode = true;
cur = null;
}
else if (cur == '\'')
{
ReadRestOfChar(input, context);
context.HasCode = true;
cur = null;
}
else if (!IsWhitespace(cur) && cur != '/') // exclude '/' to avoid counting comments as code
{
context.HasCode = true;
}
prev = cur;
}
// The final line of text should always be counted, even if it's empty.
RegisterNewLine(counts, context);
return(counts);
}
/// <summary>
/// Consumes the input text up to the end of a multi-line comment.
/// </summary>
/// <param name="input">The input text.</param>
/// <param name="counts">The line count metrics for the input text.</param>
/// <param name="context">The contextual information required during line counting.</param>
private static void ReadMultiLineComment(string input, LineCounts counts, Context context)
{
char?cur = '\0', prev = null;
context.HasComment = true;
while (cur != null && ((cur = GetNext(input, context)) != '/' || prev != '*'))
{
if (IsNewLine(cur))
{
RegisterNewLine(counts, context);
context.HasComment = true;
}
prev = cur;
}
}
/// <summary>
/// Updates the line count metrics when a newline character is seen, and resets
/// the code and comment flags in the context ready to process the next line.
/// </summary>
/// <param name="counts">The line count metrics for the input text.</param>
/// <param name="context">The contextual information required during line counting.</param>
private static void RegisterNewLine(LineCounts counts, Context context)
{
++counts.Total;
if (context.HasCode)
{
++counts.Code;
context.HasCode = false;
}
if (context.HasComment)
{
++counts.Comment;
context.HasComment = false;
}
}
//#################### PUBLIC METHODS ####################
#region
public override bool Equals(Object other)
{
LineCounts rhs = other as LineCounts;
return(rhs != null && Total == rhs.Total && Code == rhs.Code && Comment == rhs.Comment);
}
