public PreprocessorContext(ParseContext pc, SymbolLookup symbols)
{
Symbols = symbols;
parseContext = pc;
inComment = false;
InitAtomTable();
InitScanner();
ifdepth = 0;
elseSeen = new bool[MAXIFNESTING];
for (elsetracker = 0; elsetracker < MAXIFNESTING; elsetracker++)
elseSeen[elsetracker] = false;
elsetracker = 0;
inputStack = new Stack<BasePreprocessorInput> ();
buffer = new StringInputBuffer{ name = new char[StringInputBuffer.MAX_TOKEN_LENGTH], tokenText = new char[StringInputBuffer.MAX_TOKEN_LENGTH]};
}
internal bool DoStuff(ParseContext parseContext, PreprocessorContext ppContext,
InputScanner input, bool versionWillBeError)
{
//bool versionWillBeError = true;
var unNeededSpaceTokens = new HashSet<char>(new char[]{';','(',')','[',']'});
var noSpaceBeforeTokens = new HashSet<char>(new char[]{','});
var outputStream = new StringBuilder();
int lastLine = -1; // lastLine is the line number of the last token
// processed. It is tracked in order for new-lines to be inserted when
// a token appears on a new line.
int lastToken = -1;
parseContext.setScanner(input);
ppContext.setInput(input, versionWillBeError);
// Inserts newlines and incremnets lastLine until
// lastLine >= line.
Action<int> adjustLine = (line) =>
{
int tokenLine = line - 1;
while(lastLine < tokenLine) {
if (lastLine >= 0) {
outputStream.AppendLine();
}
++lastLine;
}
};
parseContext.ExtensionCallback = (int line, string extension, string behavior) =>
{
adjustLine(line);
outputStream.Append("#extension ").Append(extension).Append(" : ").Append(behavior);
};
parseContext.LineCallback = (int line, bool hasSource, int sourceNum) =>
{
// SourceNum is the number of the source-string that is being parsed.
if (lastLine != -1) {
outputStream.AppendLine();
}
outputStream.Append("#line ").Append(line);
if (hasSource) {
outputStream.Append(" ").Append(sourceNum);
}
outputStream.AppendLine();
lastLine = System.Math.Max(line - 1, 1);
};
parseContext.VersionCallback = (int line, int version, string str) =>
{
adjustLine(line);
outputStream.Append("#version ").Append(version);
if (str != null) {
outputStream.Append(" ").Append(str);
}
outputStream.AppendLine();
++lastLine;
};
parseContext.PragmaCallback = (int line, List<string> ops) =>
{
adjustLine(line);
outputStream.Append("#pragma ");
foreach(var op in ops) {
outputStream.Append(op);
}
};
parseContext.ErrorCallback = (int line, string errorMessage) =>
{
adjustLine(line);
outputStream.Append("#error ").Append(errorMessage);
};
var token = new PreprocessorToken();
string tok = ppContext.tokenize (ref token);
while (tok != null) {
int tokenLine = token.loc.line - 1; // start at 0;
bool newLine = false;
while (lastLine < tokenLine) {
if (lastLine > -1) {
outputStream.AppendLine();
newLine = true;
}
++lastLine;
if (lastLine == tokenLine) {
// Don't emit whitespace onto empty lines.
// Copy any whitespace characters at the start of a line
// from the input to the output.
for(int i = 0; i < token.loc.column - 1; ++i) {
outputStream.Append(" ");
}
}
}
// Output a space in between tokens, but not at the start of a line,
// and also not around special tokens. This helps with readability
// and consistency.
if (!newLine &&
lastToken != -1 &&
(!unNeededSpaceTokens.Contains ((char)token.token)) &&
(!unNeededSpaceTokens.Contains((char)lastToken)) &&
(!noSpaceBeforeTokens.Contains ((char)token.token)))
{
outputStream.Append(" ");
}
lastToken = token.token;
outputStream.Append(tok);
tok = ppContext.tokenize (ref token);
}
outputStream.AppendLine();
Output = outputStream.ToString();
return true;
}
