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Make next line finding a helper method

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This commit is contained in:
Matt Nadareski
2021-07-18 13:10:48 -07:00
parent 4bd6fd6fcd
commit 2dc6dea0e7
1 changed files with 60 additions and 58 deletions
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118
SabreTools.DatTools/Parser.cs
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@@ -167,67 +167,11 @@ namespace SabreTools.DatTools
// Get the first two non-whitespace, non-comment lines to check, if possible
string first = string.Empty, second = string.Empty;
// TODO: Add handling of multi-line comments
try
{
using StreamReader sr = File.OpenText(filename);
first = sr.ReadLine().ToLowerInvariant().Trim();
bool inComment = first.StartsWith("<!--");
while ((string.IsNullOrWhiteSpace(first) || inComment) && !sr.EndOfStream)
{
if (first.StartsWith("<!--") && first.EndsWith("-->"))
{
inComment = false;
first = sr.ReadLine().ToLowerInvariant().Trim();
}
else if (first.StartsWith("<!--"))
{
inComment = true;
first = sr.ReadLine().ToLowerInvariant().Trim();
}
else if (inComment && first.EndsWith("-->"))
{
first = sr.ReadLine().ToLowerInvariant().Trim();
inComment = first.StartsWith("<!--");
}
else if (string.IsNullOrWhiteSpace(first) || inComment)
{
first = sr.ReadLine().ToLowerInvariant().Trim();
inComment |= first.StartsWith("<!--");
}
}
if (!sr.EndOfStream)
{
second = sr.ReadLine().ToLowerInvariant().Trim();
inComment = second.StartsWith("<!--");
while ((string.IsNullOrWhiteSpace(second) || inComment) && !sr.EndOfStream)
{
if (second.StartsWith("<!--") && second.EndsWith("-->"))
{
inComment = false;
second = sr.ReadLine().ToLowerInvariant().Trim();
}
else if (second.StartsWith("<!--"))
{
inComment = true;
second = sr.ReadLine().ToLowerInvariant().Trim();
}
else if (inComment && second.EndsWith("-->"))
{
second = sr.ReadLine().ToLowerInvariant().Trim();
inComment = second.StartsWith("<!--");
}
else if (string.IsNullOrWhiteSpace(second) || inComment)
{
second = sr.ReadLine().ToLowerInvariant().Trim();
inComment |= second.StartsWith("<!--");
}
}
}
first = FindNextLine(sr);
second = FindNextLine(sr);
}
catch { }
@@ -289,5 +233,63 @@ namespace SabreTools.DatTools
else
return DatFormat.ClrMamePro;
}
/// <summary>
/// Find the next non-whitespace, non-comment line from an input
/// </summary>
/// <param name="sr">StreamReader representing the input</param>
/// <returns>The next complete line, if possible</returns>
private static string FindNextLine(StreamReader sr)
{
// If we're at the end of the stream, we can't do anything
if (sr.EndOfStream)
return string.Empty;
// Find the first line that's not whitespace or an XML comment
string line = sr.ReadLine().ToLowerInvariant().Trim();
bool inComment = line.StartsWith("<!--");
while ((string.IsNullOrWhiteSpace(line) || inComment) && !sr.EndOfStream)
{
// Self-contained comment lines
if (line.StartsWith("<!--") && line.EndsWith("-->"))
{
inComment = false;
line = sr.ReadLine().ToLowerInvariant().Trim();
}
// Start of block comments
else if (line.StartsWith("<!--"))
{
inComment = true;
line = sr.ReadLine().ToLowerInvariant().Trim();
}
// End of block comments
else if (inComment && line.EndsWith("-->"))
{
line = sr.ReadLine().ToLowerInvariant().Trim();
inComment = line.StartsWith("<!--");
}
// Empty lines are just skipped
else if (string.IsNullOrWhiteSpace(line))
{
line = sr.ReadLine().ToLowerInvariant().Trim();
inComment |= line.StartsWith("<!--");
}
// In-comment lines
else if (inComment)
{
line = sr.ReadLine().ToLowerInvariant().Trim();
}
}
// If we ended in a comment, return an empty string
if (inComment)
return string.Empty;
return line;
}
}
}