public string ReplaceParms(MacroEntry me, string[] actual_parms)
{
Match m;
int istart = 0;
string subst = me.Subst;
while ((m = iden.Match(subst, istart)).Success)
{
int idx = Array.IndexOf(me.Parms, m.Value);
int len = m.Length;
if (idx != -1)
{
string actual = actual_parms[idx];
// A _single_ # before a token means the 'stringizing' operator
if (m.Index > 0 && subst[m.Index - 1] == '#')
{
// whereas ## means 'token-pasting'! #s will be removed later!
if (!(m.Index > 1 && subst[m.Index - 2] == '#'))
{
actual = '\"' + actual + '\"';
}
}
subst = iden.Replace(subst, actual, 1, istart);
len = actual.Length;
}
istart = m.Index + len;
}
subst = subst.Replace("#", "");
return(subst);
}
public string ReplaceParms(MacroEntry me, string[] actual_parms)
{
Match m;
int istart = 0;
string subst = me.Subst;
while ((m = iden.Match(subst, istart)).Success)
{
int idx = Array.IndexOf(me.Parms, m.Value);
int len = m.Length;
if (idx != -1)
{
string actual = actual_parms[idx];
// A _single_ # before a token means the 'stringizing' operator
if (m.Index > 0 && subst[m.Index - 1] == '#')
{
// whereas ## means 'token-pasting'! #s will be removed later!
if (!(m.Index > 1 && subst[m.Index - 2] == '#'))
actual = '\"' + actual + '\"';
}
subst = iden.Replace(subst, actual, 1, istart);
len = actual.Length;
}
istart = m.Index + len;
}
subst = subst.Replace("#", "");
return subst;
}
public void AddMacro(string name, string subst, string[] parms)
{
MacroEntry me = new MacroEntry();
me.Subst = subst;
me.Parms = parms;
macroTable[name] = me;
}
public void AddMacro(string name, string subst, string[] parms)
{
MacroEntry me = new MacroEntry();
me.Subst = subst;
me.Parms = parms;
macroTable[name] = me;
}
void ProcessCommand(string line)
{
Match m = cmdSplit.Match(line);
string cmd = m.Groups[1].ToString();
string arg = m.Groups[2].ToString().TrimStart(null);
switch (cmd)
{
case "n":
AddNamespace(arg);
break;
case "r":
AddReference(arg);
break;
case "v":
foreach (string v in varTable.Keys)
{
Utils.Print(v + " = " + varTable[v]);
}
break;
case "dcl":
MustDeclare = !MustDeclare;
break;
case "code": // show code sent to compiler!
showCode = !showCode;
break;
default:
// a macro may be used as a command; the line is split up and
// and supplied as arguments.
// For macros taking one argument, the whole line is supplied.
MacroEntry me = macro.Lookup(cmd);
if (me != null && me.Parms != null)
{
string[] parms;
if (me.Parms.Length > 1)
{
parms = spaces.Split(arg);
}
else
{
parms = new string[] { arg }
};
string s = macro.ReplaceParms(me, parms);
ExecuteLine(s);
}
else
{
Utils.Print("unrecognized command, or bad macro");
}
break;
}
}
public string Substitute(string str)
{
Match m;
int istart = 0;
while ((m = iden.Match(str, istart)).Success)
{
MacroEntry me = (MacroEntry)macroTable[m.Value];
if (me != null)
{
string subst = me.Subst;
if (me.Parms != null)
{
int i = m.Index + m.Length; // points to char just beyond match
while (i < str.Length && str[i] != '(')
{
i++;
}
i++; // just past '('
int parenDepth = 1;
string[] actuals = new string[me.Parms.Length];
int idx = 0, isi = i;
while (parenDepth > 0 && i < str.Length)
{
char ch = str[i];
if (parenDepth == 1 && (ch == ',' || ch == ')'))
{
actuals[idx] = str.Substring(isi, i - isi);
idx++;
isi = i + 1; // past ',' or ')'
}
// understands commas within braces or square brackets (e.g. 'matrix' indexing)
if (ch == '(' || ch == '{' || ch == '[')
{
parenDepth++;
}
else
if (ch == ')' || ch == '}' || ch == ']')
{
parenDepth--;
}
i++;
}
if (parenDepth != 0)
{
return("**Badly formed macro call**");
}
subst = ReplaceParms(me, actuals);
istart = m.Index;
str = str.Remove(istart, i - istart);
str = str.Insert(istart, subst);
}
else
{
str = iden.Replace(str, subst, 1, istart);
}
}
else
{
istart = m.Index + m.Length;
}
}
return(str);
}
