internal static ParseResult parseBraces(Interp interp, string str, int index, int length)
{
char[] arr = str.ToCharArray();
int level = 1;
for (int i = index; i < length;)
{
if (Parser.charType(arr[i]) == Parser.TYPE_NORMAL)
{
i++;
}
else if (arr[i] == '}')
{
level--;
if (level == 0)
{
str = new string(arr, index, i - index);
return(new ParseResult(str, i + 1));
}
i++;
}
else if (arr[i] == '{')
{
level++;
i++;
}
else if (arr[i] == '\\')
{
BackSlashResult bs = Parser.backslash(arr, i);
i = bs.NextIndex;
}
else
{
i++;
}
}
//if you run off the end of the string you went too far
throw new TclException(interp, "missing close-brace");
}
/// <summary> This procedure is invoked to process the "subst" Tcl command.
/// See the user documentation for details on what it does.
///
/// </summary>
/// <param name="interp">the current interpreter.
/// </param>
/// <param name="argv">command arguments.
/// </param>
/// <exception cref=""> TclException if wrong # of args or invalid argument(s).
/// </exception>
public TCL.CompletionCode CmdProc(Interp interp, TclObject[] argv)
{
int currentObjIndex, len, i;
int objc = argv.Length - 1;
bool doBackslashes = true;
bool doCmds = true;
bool doVars = true;
StringBuilder result = new StringBuilder();
string s;
char c;
for (currentObjIndex = 1; currentObjIndex < objc; currentObjIndex++)
{
if (!argv[currentObjIndex].ToString().StartsWith("-"))
{
break;
}
int opt = TclIndex.Get(interp, argv[currentObjIndex], validCmds, "switch", 0);
switch (opt)
{
case OPT_NOBACKSLASHES:
doBackslashes = false;
break;
case OPT_NOCOMMANDS:
doCmds = false;
break;
case OPT_NOVARS:
doVars = false;
break;
default:
throw new TclException(interp, "SubstCmd.cmdProc: bad option " + opt + " index to cmds");
}
}
if (currentObjIndex != objc)
{
throw new TclNumArgsException(interp, currentObjIndex, argv, "?-nobackslashes? ?-nocommands? ?-novariables? string");
}
/*
* Scan through the string one character at a time, performing
* command, variable, and backslash substitutions.
*/
s = argv[currentObjIndex].ToString();
len = s.Length;
i = 0;
while (i < len)
{
c = s[i];
if ((c == '[') && doCmds)
{
ParseResult res;
try
{
interp._evalFlags = Parser.TCL_BRACKET_TERM;
interp.Eval(s.Substring(i + 1, (len) - (i + 1)));
TclObject interp_result = interp.GetResult();
interp_result.Preserve();
res = new ParseResult(interp_result, i + interp._termOffset);
}
catch (TclException e)
{
i = e.errIndex + 1;
throw;
}
i = res.nextIndex + 2;
result.Append(res.Value.ToString());
res.Release();
}
else if (c == '\r')
{
/*
* (ToDo) may not be portable on Mac
*/
i++;
}
else if ((c == '$') && doVars)
{
ParseResult vres = Parser.parseVar(interp, s.Substring(i, (len) - (i)));
i += vres.nextIndex;
result.Append(vres.Value.ToString());
vres.Release();
}
else if ((c == '\\') && doBackslashes)
{
BackSlashResult bs = Tcl.Lang.Interp.backslash(s, i, len);
i = bs.NextIndex;
if (bs.IsWordSep)
{
break;
}
else
{
result.Append(bs.C);
}
}
else
{
result.Append(c);
i++;
}
}
interp.SetResult(result.ToString());
return(TCL.CompletionCode.RETURN);
}
internal static FindElemResult findElement(Interp interp, string s, int i, int len)
{
int openBraces = 0;
bool inQuotes = false;
for (; i < len && System.Char.IsWhiteSpace(s[i]); i++)
{
;
}
if (i >= len)
{
return(null);
}
char c = s[i];
if (c == '{')
{
openBraces = 1;
i++;
}
else if (c == '"')
{
inQuotes = true;
i++;
}
StringBuilder sbuf = new StringBuilder();
while (true)
{
if (i >= len)
{
if (openBraces != 0)
{
throw new TclException(interp, "unmatched open brace in list");
}
else if (inQuotes)
{
throw new TclException(interp, "unmatched open quote in list");
}
return(new FindElemResult(i, sbuf.ToString(), openBraces));
}
c = s[i];
switch (c)
{
// Open brace: don't treat specially unless the element is
// in braces. In this case, keep a nesting count.
case '{':
if (openBraces != 0)
{
openBraces++;
}
sbuf.Append(c);
i++;
break;
// Close brace: if element is in braces, keep nesting
// count and quit when the last close brace is seen.
case '}':
if (openBraces == 1)
{
if (i == len - 1 || System.Char.IsWhiteSpace(s[i + 1]))
{
return(new FindElemResult(i + 1, sbuf.ToString(), openBraces));
}
else
{
int errEnd;
for (errEnd = i + 1; errEnd < len; errEnd++)
{
if (System.Char.IsWhiteSpace(s[errEnd]))
{
break;
}
}
throw new TclException(interp, "list element in braces followed by \"" + s.Substring(i + 1, (errEnd) - (i + 1)) + "\" instead of space");
}
}
else if (openBraces != 0)
{
openBraces--;
}
sbuf.Append(c);
i++;
break;
// Backslash: skip over everything up to the end of the
// backslash sequence.
case '\\':
BackSlashResult bs = Interp.backslash(s, i, len);
if (openBraces > 0)
{
// Quotes are ignored in brace-quoted stuff
sbuf.Append(s.Substring(i, (bs.NextIndex) - (i)));
}
else
{
sbuf.Append(bs.C);
}
i = bs.NextIndex;
break;
// Space: ignore if element is in braces or quotes; otherwise
// terminate element.
case ' ':
case '\f':
case '\n':
case '\r':
case '\t':
if ((openBraces == 0) && !inQuotes)
{
return(new FindElemResult(i + 1, sbuf.ToString(), openBraces));
}
else
{
sbuf.Append(c);
i++;
}
break;
// Double-quote: if element is in quotes then terminate it.
case '"':
if (inQuotes)
{
if (i == len - 1 || System.Char.IsWhiteSpace(s[i + 1]))
{
return(new FindElemResult(i + 1, sbuf.ToString(), openBraces));
}
else
{
int errEnd;
for (errEnd = i + 1; errEnd < len; errEnd++)
{
if (System.Char.IsWhiteSpace(s[errEnd]))
{
break;
}
}
throw new TclException(interp, "list element in quotes followed by \"" + s.Substring(i + 1, (errEnd) - (i + 1)) + "\" instead of space");
}
}
else
{
sbuf.Append(c);
i++;
}
break;
default:
sbuf.Append(c);
i++;
break;
}
}
}
internal static int scanElement(Interp interp, string inString)
{
int flags, nestingLevel;
char c;
int len;
int i;
// This procedure and Tcl_ConvertElement together do two things:
//
// 1. They produce a proper list, one that will yield back the
// argument strings when evaluated or when disassembled with
// Tcl_SplitList. This is the most important thing.
//
// 2. They try to produce legible output, which means minimizing the
// use of backslashes (using braces instead). However, there are
// some situations where backslashes must be used (e.g. an element
// like "{abc": the leading brace will have to be backslashed. For
// each element, one of three things must be done:
//
// (a) Use the element as-is (it doesn't contain anything special
// characters). This is the most desirable option.
//
// (b) Enclose the element in braces, but leave the contents alone.
// This happens if the element contains embedded space, or if it
// contains characters with special interpretation ($, [, ;, or \),
// or if it starts with a brace or double-quote, or if there are
// no characters in the element.
//
// (c) Don't enclose the element in braces, but add backslashes to
// prevent special interpretation of special characters. This is a
// last resort used when the argument would normally fall under case
// (b) but contains unmatched braces. It also occurs if the last
// character of the argument is a backslash or if the element contains
// a backslash followed by newline.
//
// The procedure figures out how many bytes will be needed to store
// the result (actually, it overestimates). It also collects
// information about the element in the form of a flags word.
nestingLevel = 0;
flags = 0;
i = 0;
len = (inString != null ? inString.Length : 0);
if (len == 0)
{
inString = '\x0000'.ToString();
// FIXME : pizza compiler workaround
// We really should be able to use the "\0" form but there
// is a nasty bug in the pizza compiler shipped with kaffe
// that causes "\0" to be read as the empty string.
//string = "\0";
}
System.Diagnostics.Debug.WriteLine("scanElement string is \"" + inString + "\"");
c = inString[i];
if ((c == '{') || (c == '"') || (c == '\x0000'))
{
flags |= USE_BRACES;
}
for (; i < len; i++)
{
System.Diagnostics.Debug.WriteLine("getting char at index " + i);
System.Diagnostics.Debug.WriteLine("char is '" + inString[i] + "'");
c = inString[i];
switch (c)
{
case '{':
nestingLevel++;
break;
case '}':
nestingLevel--;
if (nestingLevel < 0)
{
flags |= TCL_DONT_USE_BRACES | BRACES_UNMATCHED;
}
break;
case '[':
case '$':
case ';':
case ' ':
case '\f':
case '\n':
case '\r':
case '\t':
case (char)(0x0b):
flags |= USE_BRACES;
break;
case '\\':
if ((i >= len - 1) || (inString[i + 1] == '\n'))
{
flags = TCL_DONT_USE_BRACES | BRACES_UNMATCHED;
}
else
{
BackSlashResult bs = Interp.backslash(inString, i, len);
// Subtract 1 because the for loop will automatically
// add one on the next iteration.
i = (bs.NextIndex - 1);
flags |= USE_BRACES;
}
break;
}
}
if (nestingLevel != 0)
{
flags = TCL_DONT_USE_BRACES | BRACES_UNMATCHED;
}
return(flags);
}
