/// <summary>Return the begin and end of the keyword</summary>
public static (int BeginPos, int EndPos) GetKeywordPos(int pos, string line)
{
//Debug.WriteLine(string.Format("INFO: getKeyword; pos={0}; line=\"{1}\"", pos, new string(line)));
if ((pos < 0) || (pos >= line.Length))
{
return(pos, pos);
}
// find the beginning of the keyword
int beginPos = 0;
for (int i1 = pos - 1; i1 >= 0; --i1)
{
char c = line[i1];
if (AsmSourceTools.IsSeparatorChar(c) || Char.IsControl(c) || AsmSourceTools.IsRemarkChar(c))
{
beginPos = i1 + 1;
break;
}
}
// find the end of the keyword
int endPos = line.Length;
for (int i2 = pos; i2 < line.Length; ++i2)
{
char c = line[i2];
if (AsmSourceTools.IsSeparatorChar(c) || Char.IsControl(c) || AsmSourceTools.IsRemarkChar(c))
{
endPos = i2;
break;
}
}
return(BeginPos : beginPos, EndPos : endPos);
}
private static (bool Valid, int BeginPos, int EndPos) GetLabelDefPos_Regular(string line)
{
int nChars = line.Length;
int i = 0;
// find the start of the first keyword
for (; i < nChars; ++i)
{
char c = line[i];
if (AsmSourceTools.IsRemarkChar(c))
{
return(Valid : false, BeginPos : 0, EndPos : 0);
}
else if (char.IsWhiteSpace(c))
{
// do nothing
}
else
{
break;
}
}
if (i >= nChars)
{
return(Valid : false, BeginPos : 0, EndPos : 0);
}
int beginPos = i;
// position i points to the start of the current keyword
//AsmDudeToolsStatic.Output_INFO("getLabelEndPos: found first char of first keyword "+ line[i]+".");
for (; i < nChars; ++i)
{
char c = line[i];
if (c.Equals(':'))
{
if (i == 0)
{ // we found an empty label
return(Valid : false, BeginPos : 0, EndPos : 0);
}
else
{
return(Valid : true, BeginPos : beginPos, EndPos : i);
}
}
else if (AsmSourceTools.IsRemarkChar(c))
{
return(Valid : false, BeginPos : 0, EndPos : 0);
}
else if (AsmSourceTools.IsSeparatorChar(c))
{
// found another keyword: labels can only be the first keyword on a line
break;
}
}
return(Valid : false, BeginPos : 0, EndPos : 0);
}