public SclVal(Token token, SclElement owner)
{
Token = token;
Owner = owner;
Val = Read(token);
}
private string Read(Token token)
{
var str = token.val;
if (token.kind == _sVal)
return str;
var sb = new StringBuilder(str.Length - 2);
for (int i = 1; i < str.Length - 1; i++)
{
var c = str[i];
if (c == '\\')
{
i++;
c = str[i];
if (c == 'a') c = '\a';
else if (c == 'b') c = '\b';
else if (c == 'f') c = '\f';
else if (c == 'n') c = '\n';
else if (c == 'r') c = '\r';
else if (c == 't') c = '\t';
else if (c == 'v') c = '\v';
else if (c == '"') c = '"';
else if (c == '\\') c = '\\';
}
sb.Append(c);
}
return sb.ToString();
}
public void Parse()
{
la = new Token();
la.val = "";
Get();
Scl();
Expect(0);
}
void Get()
{
for (;;) {
t = la;
la = scanner.Scan();
if (la.kind <= maxT) { ++errDist; break; }
la = t;
}
}
Token NextToken()
{
while (ch == ' ' ||
ch == 9 || ch == 13 || ch == ' '
) NextCh();
if (ch == '#' && Comment0()) return NextToken();
int recKind = noSym;
int recEnd = pos;
t = new Token();
t.pos = pos; t.col = col; t.line = line; t.charPos = charPos;
int state;
if (start.ContainsKey(ch)) { state = (int) start[ch]; }
else { state = 0; }
tlen = 0; AddCh();
switch (state) {
case -1: { t.kind = eofSym; break; } // NextCh already done
case 0: {
if (recKind != noSym) {
tlen = recEnd - t.pos;
SetScannerBehindT();
}
t.kind = recKind; break;
} // NextCh already done
case 1:
{t.kind = 1; break;}
case 2:
{t.kind = 2; break;}
case 3:
recEnd = pos; recKind = 3;
if (ch <= 8 || ch >= 11 && ch <= 12 || ch >= 14 && ch <= 31 || ch == '!' || ch >= '#' && ch <= ':' || ch >= '<' && ch <= 65535) {AddCh(); goto case 3;}
else {t.kind = 3; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}
case 4:
if (ch == '"') {AddCh(); goto case 5;}
else if (ch <= 9 || ch >= 11 && ch <= 12 || ch >= 14 && ch <= '!' || ch >= '#' && ch <= '[' || ch >= ']' && ch <= 65535) {AddCh(); goto case 4;}
else if (ch == 92) {AddCh(); goto case 6;}
else {goto case 0;}
case 5:
{t.kind = 4; break;}
case 6:
if (ch == '"' || ch == '0' || ch == 92 || ch >= 'a' && ch <= 'b' || ch == 'f' || ch == 'n' || ch == 'r' || ch == 't' || ch == 'v') {AddCh(); goto case 4;}
else {goto case 0;}
}
t.val = new String(tval, 0, tlen);
return t;
}
void Init()
{
pos = -1; line = 1; col = 0; charPos = -1;
oldEols = 0;
NextCh();
if (ch == 0xEF) { // check optional byte order mark for UTF-8
NextCh(); int ch1 = ch;
NextCh(); int ch2 = ch;
if (ch1 != 0xBB || ch2 != 0xBF) {
throw new FatalError(String.Format("illegal byte order mark: EF {0,2:X} {1,2:X}", ch1, ch2));
}
col = 0; charPos = -1;
NextCh();
}
pt = tokens = new Token(); // first token is a dummy
}
// get the next token (possibly a token already seen during peeking)
public Token Scan()
{
if (tokens.next == null) {
return NextToken();
} else {
pt = tokens = tokens.next;
return tokens;
}
}
// make sure that peeking starts at the current scan position
public void ResetPeek()
{
pt = tokens;
}
// peek for the next token, ignore pragmas
public Token Peek()
{
do {
if (pt.next == null) {
pt.next = NextToken();
}
pt = pt.next;
} while (pt.kind > maxT); // skip pragmas
return pt;
}
