private void HandleExplicitNumericGroups(ArrayList explicit_numeric_groups)
{
int gid = gap;
int i = 0;
int n_explicit = explicit_numeric_groups.Count;
explicit_numeric_groups.Sort();
// move 'gap' forward to skip over all explicit groups that
// turn out to match their index
for (; i < n_explicit; ++i)
{
CapturingGroup g = (CapturingGroup)explicit_numeric_groups [i];
if (g.Index > gid)
{
break;
}
if (g.Index == gid)
{
gid++;
}
}
gap = gid;
// re-index all further groups so that the indexes are contiguous
int prev = gid;
for (; i < n_explicit; ++i)
{
CapturingGroup g = (CapturingGroup)explicit_numeric_groups [i];
if (g.Index == prev)
{
g.Index = gid - 1;
}
else
{
prev = g.Index;
g.Index = gid++;
}
}
}
public int GetMapping(Hashtable mapping)
{
int end = caps.Count;
mapping.Add("0", 0);
for (int i = 0; i < end; i++)
{
CapturingGroup group = (CapturingGroup)caps [i];
string name = group.Name != null ? group.Name : group.Index.ToString();
if (mapping.Contains(name))
{
if ((int)mapping [name] != group.Index)
{
throw new SystemException("invalid state");
}
continue;
}
mapping.Add(name, group.Index);
}
return(gap);
}
public int GetMapping(Hashtable mapping)
{
int count = caps.Count;
mapping.Add("0", 0);
for (int i = 0; i < count; i++)
{
CapturingGroup capturingGroup = (CapturingGroup)caps[i];
string key = (capturingGroup.Name == null) ? capturingGroup.Index.ToString() : capturingGroup.Name;
if (mapping.Contains(key))
{
if ((int)mapping[key] != capturingGroup.Index)
{
throw new SystemException("invalid state");
}
}
else
{
mapping.Add(key, capturingGroup.Index);
}
}
return(gap);
}
private Expression ParseGroupingConstruct(ref RegexOptions options)
{
if (pattern[ptr] != '?')
{
Group group;
if (IsExplicitCapture(options))
{
group = new Group();
}
else
{
group = new CapturingGroup();
caps.Add(group);
}
ParseGroup(group, options, null);
return(group);
}
else
{
++ptr;
}
switch (pattern[ptr])
{
case ':': { // non-capturing group
++ptr;
Group group = new Group();
ParseGroup(group, options, null);
return(group);
}
case '>': { // non-backtracking group
++ptr;
Group group = new NonBacktrackingGroup();
ParseGroup(group, options, null);
return(group);
}
case 'i':
case 'm':
case 'n':
case 's':
case 'x':
case '-': { // options
RegexOptions o = options;
ParseOptions(ref o, false);
if (pattern[ptr] == '-')
{
++ptr;
ParseOptions(ref o, true);
}
if (pattern[ptr] == ':') // pass options to child group
{
++ptr;
Group group = new Group();
ParseGroup(group, o, null);
return(group);
}
else if (pattern[ptr] == ')') // change options of enclosing group
{
++ptr;
options = o;
return(null);
}
else
{
throw NewParseException("Bad options");
}
}
case '<':
case '=':
case '!': { // lookahead/lookbehind
ExpressionAssertion asn = new ExpressionAssertion();
if (!ParseAssertionType(asn))
{
goto case '\''; // it's a (?<name> ) construct
}
Group test = new Group();
ParseGroup(test, options, null);
asn.TestExpression = test;
return(asn);
}
case '\'': { // named/balancing group
char delim;
if (pattern[ptr] == '<')
{
delim = '>';
}
else
{
delim = '\'';
}
++ptr;
string name = ParseName();
if (pattern[ptr] == delim)
{
// capturing group
if (name == null)
{
throw NewParseException("Bad group name.");
}
++ptr;
CapturingGroup cap = new CapturingGroup();
cap.Name = name;
caps.Add(cap);
ParseGroup(cap, options, null);
return(cap);
}
else if (pattern[ptr] == '-')
{
// balancing group
++ptr;
string balance_name = ParseName();
if (balance_name == null || pattern[ptr] != delim)
{
throw NewParseException("Bad balancing group name.");
}
++ptr;
BalancingGroup bal = new BalancingGroup();
bal.Name = name;
if (bal.IsNamed)
{
caps.Add(bal);
}
refs.Add(bal, balance_name);
ParseGroup(bal, options, null);
return(bal);
}
else
{
throw NewParseException("Bad group name.");
}
}
case '(': { // expression/capture test
Assertion asn;
++ptr;
int p = ptr;
string name = ParseName();
if (name == null || pattern[ptr] != ')') // expression test
// FIXME MS implementation doesn't seem to
// implement this version of (?(x) ...)
{
ptr = p;
ExpressionAssertion expr_asn = new ExpressionAssertion();
if (pattern[ptr] == '?')
{
++ptr;
if (!ParseAssertionType(expr_asn))
{
throw NewParseException("Bad conditional.");
}
}
else
{
expr_asn.Negate = false;
expr_asn.Reverse = false;
}
Group test = new Group();
ParseGroup(test, options, null);
expr_asn.TestExpression = test;
asn = expr_asn;
}
else // capture test
{
++ptr;
asn = new CaptureAssertion(new Literal(name, IsIgnoreCase(options)));
refs.Add(asn, name);
}
Group group = new Group();
ParseGroup(group, options, asn);
return(group);
}
case '#': { // comment
++ptr;
while (pattern[ptr++] != ')')
{
if (ptr >= pattern.Length)
{
throw NewParseException("Unterminated (?#...) comment.");
}
}
return(null);
}
default: // error
throw NewParseException("Bad grouping construct.");
}
}
private void ResolveReferences()
{
int gid = 1;
Hashtable dict = new Hashtable();
ArrayList explicit_numeric_groups = null;
// number unnamed groups
foreach (CapturingGroup group in caps)
{
if (group.Name != null)
{
continue;
}
dict.Add(gid.ToString(), group);
group.Index = gid++;
++num_groups;
}
// number named groups
foreach (CapturingGroup group in caps)
{
if (group.Name == null)
{
continue;
}
if (dict.Contains(group.Name))
{
CapturingGroup prev = (CapturingGroup)dict [group.Name];
group.Index = prev.Index;
if (group.Index == gid)
{
gid++;
}
else if (group.Index > gid)
{
explicit_numeric_groups.Add(group);
}
continue;
}
if (Char.IsDigit(group.Name [0]))
{
int ptr = 0;
int group_gid = ParseDecimal(group.Name, ref ptr);
if (ptr == group.Name.Length)
{
group.Index = group_gid;
dict.Add(group.Name, group);
++num_groups;
if (group_gid == gid)
{
gid++;
}
else
{
// all numbers before 'gid' are already in the dictionary. So, we know group_gid > gid
if (explicit_numeric_groups == null)
{
explicit_numeric_groups = new ArrayList(4);
}
explicit_numeric_groups.Add(group);
}
continue;
}
}
string gid_s = gid.ToString();
while (dict.Contains(gid_s))
{
gid_s = (++gid).ToString();
}
dict.Add(gid_s, group);
dict.Add(group.Name, group);
group.Index = gid++;
++num_groups;
}
gap = gid; // == 1 + num_groups, if explicit_numeric_groups == null
if (explicit_numeric_groups != null)
{
HandleExplicitNumericGroups(explicit_numeric_groups);
}
// resolve references
foreach (Expression expr in refs.Keys)
{
string name = (string)refs [expr];
if (!dict.Contains(name))
{
if (expr is CaptureAssertion && !Char.IsDigit(name [0]))
{
continue;
}
BackslashNumber bn = expr as BackslashNumber;
if (bn != null && bn.ResolveReference(name, dict))
{
continue;
}
throw NewParseException("Reference to undefined group " +
(Char.IsDigit(name[0]) ? "number " : "name ") +
name);
}
CapturingGroup group = (CapturingGroup)dict[name];
if (expr is Reference)
{
((Reference)expr).CapturingGroup = group;
}
else if (expr is CaptureAssertion)
{
((CaptureAssertion)expr).CapturingGroup = group;
}
else if (expr is BalancingGroup)
{
((BalancingGroup)expr).Balance = group;
}
}
}
private void ResolveReferences()
{
int gid = 1;
Hashtable dict = new Hashtable();
// number unnamed groups
foreach (CapturingGroup group in caps)
{
if (group.Name == null)
{
dict.Add(gid.ToString(), group);
group.Number = gid++;
++num_groups;
}
}
// number named groups
foreach (CapturingGroup group in caps)
{
if (group.Name != null)
{
if (!dict.Contains(group.Name))
{
dict.Add(group.Name, group);
group.Number = gid++;
++num_groups;
}
else
{
CapturingGroup prev = (CapturingGroup)dict[group.Name];
group.Number = prev.Number;
}
}
}
// resolve references
foreach (Expression expr in refs.Keys)
{
string name = (string)refs[expr];
if (!dict.Contains(name))
{
if (expr is CaptureAssertion && !Char.IsDigit(name [0]))
{
continue;
}
throw NewParseException("Reference to undefined group " +
(Char.IsDigit(name[0]) ? "number " : "name ") +
name);
}
CapturingGroup group = (CapturingGroup)dict[name];
if (expr is Reference)
{
((Reference)expr).CapturingGroup = group;
}
else if (expr is CaptureAssertion)
{
((CaptureAssertion)expr).CapturingGroup = group;
}
else if (expr is BalancingGroup)
{
((BalancingGroup)expr).Balance = group;
}
}
}
private Expression ParseGroupingConstruct (ref RegexOptions options) {
if (pattern[ptr] != '?') {
Group group;
if (IsExplicitCapture (options))
group = new Group ();
else {
group = new CapturingGroup ();
caps.Add (group);
}
ParseGroup (group, options, null);
return group;
}
else
++ ptr;
switch (pattern[ptr]) {
case ':': { // non-capturing group
++ ptr;
Group group = new Group ();
ParseGroup (group, options, null);
return group;
}
case '>': { // non-backtracking group
++ ptr;
Group group = new NonBacktrackingGroup ();
ParseGroup (group, options, null);
return group;
}
case 'i': case 'm': case 'n':
case 's': case 'x': case '-': { // options
RegexOptions o = options;
ParseOptions (ref o, false);
if (pattern[ptr] == '-') {
++ ptr;
ParseOptions (ref o, true);
}
if (pattern[ptr] == ':') { // pass options to child group
++ ptr;
Group group = new Group ();
ParseGroup (group, o, null);
return group;
}
else if (pattern[ptr] == ')') { // change options of enclosing group
++ ptr;
options = o;
return null;
}
else
throw NewParseException ("Bad options");
}
case '<': case '=': case '!': { // lookahead/lookbehind
ExpressionAssertion asn = new ExpressionAssertion ();
if (!ParseAssertionType (asn))
goto case '\''; // it's a (?<name> ) construct
Group test = new Group ();
ParseGroup (test, options, null);
asn.TestExpression = test;
return asn;
}
case '\'': { // named/balancing group
char delim;
if (pattern[ptr] == '<')
delim = '>';
else
delim = '\'';
++ ptr;
string name = ParseName ();
if (pattern[ptr] == delim) {
// capturing group
if (name == null)
throw NewParseException ("Bad group name.");
++ ptr;
CapturingGroup cap = new CapturingGroup ();
cap.Name = name;
caps.Add (cap);
ParseGroup (cap, options, null);
return cap;
}
else if (pattern[ptr] == '-') {
// balancing group
++ ptr;
string balance_name = ParseName ();
if (balance_name == null || pattern[ptr] != delim)
throw NewParseException ("Bad balancing group name.");
++ ptr;
BalancingGroup bal = new BalancingGroup ();
bal.Name = name;
if(bal.IsNamed) {
caps.Add (bal);
}
refs.Add (bal, balance_name);
ParseGroup (bal, options, null);
return bal;
}
else
throw NewParseException ("Bad group name.");
}
case '(': { // expression/capture test
Assertion asn;
++ ptr;
int p = ptr;
string name = ParseName ();
if (name == null || pattern[ptr] != ')') { // expression test
// FIXME MS implementation doesn't seem to
// implement this version of (?(x) ...)
ptr = p;
ExpressionAssertion expr_asn = new ExpressionAssertion ();
if (pattern[ptr] == '?') {
++ ptr;
if (!ParseAssertionType (expr_asn))
throw NewParseException ("Bad conditional.");
}
else {
expr_asn.Negate = false;
expr_asn.Reverse = false;
}
Group test = new Group ();
ParseGroup (test, options, null);
expr_asn.TestExpression = test;
asn = expr_asn;
}
else { // capture test
++ ptr;
asn = new CaptureAssertion (new Literal (name, IsIgnoreCase (options)));
refs.Add (asn, name);
}
Group group = new Group ();
ParseGroup (group, options, asn);
return group;
}
case '#': { // comment
++ ptr;
while (pattern[ptr ++] != ')') {
if (ptr >= pattern.Length)
throw NewParseException ("Unterminated (?#...) comment.");
}
return null;
}
default: // error
throw NewParseException ("Bad grouping construct.");
}
}
private Expression ParseGroupingConstruct(ref RegexOptions options)
{
if (pattern[ptr] != '?')
{
Group group;
if (IsExplicitCapture(options))
{
group = new Group();
}
else
{
group = new CapturingGroup();
caps.Add(group);
}
ParseGroup(group, options, null);
return(group);
}
ptr++;
switch (pattern[ptr])
{
case ':':
{
ptr++;
Group group6 = new Group();
ParseGroup(group6, options, null);
return(group6);
}
case '>':
{
ptr++;
Group group2 = new NonBacktrackingGroup();
ParseGroup(group2, options, null);
return(group2);
}
case '-':
case 'i':
case 'm':
case 'n':
case 's':
case 'x':
{
RegexOptions options2 = options;
ParseOptions(ref options2, negate: false);
if (pattern[ptr] == '-')
{
ptr++;
ParseOptions(ref options2, negate: true);
}
if (pattern[ptr] == ':')
{
ptr++;
Group group3 = new Group();
ParseGroup(group3, options2, null);
return(group3);
}
if (pattern[ptr] == ')')
{
ptr++;
options = options2;
return(null);
}
throw NewParseException("Bad options");
}
case '!':
case '<':
case '=':
{
ExpressionAssertion expressionAssertion2 = new ExpressionAssertion();
if (!ParseAssertionType(expressionAssertion2))
{
goto case '\'';
}
Group group7 = new Group();
ParseGroup(group7, options, null);
expressionAssertion2.TestExpression = group7;
return(expressionAssertion2);
}
case '\'':
{
char c = (pattern[ptr] != '<') ? '\'' : '>';
ptr++;
string text2 = ParseName();
if (pattern[ptr] == c)
{
if (text2 == null)
{
throw NewParseException("Bad group name.");
}
ptr++;
CapturingGroup capturingGroup = new CapturingGroup();
capturingGroup.Name = text2;
caps.Add(capturingGroup);
ParseGroup(capturingGroup, options, null);
return(capturingGroup);
}
if (pattern[ptr] == '-')
{
ptr++;
string text3 = ParseName();
if (text3 == null || pattern[ptr] != c)
{
throw NewParseException("Bad balancing group name.");
}
ptr++;
BalancingGroup balancingGroup = new BalancingGroup();
balancingGroup.Name = text2;
if (balancingGroup.IsNamed)
{
caps.Add(balancingGroup);
}
refs.Add(balancingGroup, text3);
ParseGroup(balancingGroup, options, null);
return(balancingGroup);
}
throw NewParseException("Bad group name.");
}
case '(':
{
ptr++;
int num = ptr;
string text = ParseName();
Assertion assertion;
if (text == null || pattern[ptr] != ')')
{
ptr = num;
ExpressionAssertion expressionAssertion = new ExpressionAssertion();
if (pattern[ptr] == '?')
{
ptr++;
if (!ParseAssertionType(expressionAssertion))
{
throw NewParseException("Bad conditional.");
}
}
else
{
expressionAssertion.Negate = false;
expressionAssertion.Reverse = false;
}
Group group4 = new Group();
ParseGroup(group4, options, null);
expressionAssertion.TestExpression = group4;
assertion = expressionAssertion;
}
else
{
ptr++;
assertion = new CaptureAssertion(new Literal(text, IsIgnoreCase(options)));
refs.Add(assertion, text);
}
Group group5 = new Group();
ParseGroup(group5, options, assertion);
return(group5);
}
case '#':
ptr++;
while (pattern[ptr++] != ')')
{
if (ptr >= pattern.Length)
{
throw NewParseException("Unterminated (?#...) comment.");
}
}
return(null);
default:
throw NewParseException("Bad grouping construct.");
}
}
private void ResolveReferences()
{
int num = 1;
Hashtable hashtable = new Hashtable();
ArrayList arrayList = null;
foreach (CapturingGroup cap in caps)
{
if (cap.Name == null)
{
hashtable.Add(num.ToString(), cap);
cap.Index = num++;
num_groups++;
}
}
foreach (CapturingGroup cap2 in caps)
{
if (cap2.Name != null)
{
if (hashtable.Contains(cap2.Name))
{
CapturingGroup capturingGroup3 = (CapturingGroup)hashtable[cap2.Name];
cap2.Index = capturingGroup3.Index;
if (cap2.Index == num)
{
num++;
}
else if (cap2.Index > num)
{
arrayList.Add(cap2);
}
}
else
{
if (char.IsDigit(cap2.Name[0]))
{
int num3 = 0;
int num4 = ParseDecimal(cap2.Name, ref num3);
if (num3 == cap2.Name.Length)
{
cap2.Index = num4;
hashtable.Add(cap2.Name, cap2);
num_groups++;
if (num4 == num)
{
num++;
}
else
{
if (arrayList == null)
{
arrayList = new ArrayList(4);
}
arrayList.Add(cap2);
}
continue;
}
}
string key = num.ToString();
while (hashtable.Contains(key))
{
int num5 = ++num;
key = num5.ToString();
}
hashtable.Add(key, cap2);
hashtable.Add(cap2.Name, cap2);
cap2.Index = num++;
num_groups++;
}
}
}
gap = num;
if (arrayList != null)
{
HandleExplicitNumericGroups(arrayList);
}
foreach (Expression key2 in refs.Keys)
{
string text = (string)refs[key2];
if (!hashtable.Contains(text))
{
if (!(key2 is CaptureAssertion) || char.IsDigit(text[0]))
{
BackslashNumber backslashNumber = key2 as BackslashNumber;
if (backslashNumber == null || !backslashNumber.ResolveReference(text, hashtable))
{
throw NewParseException("Reference to undefined group " + ((!char.IsDigit(text[0])) ? "name " : "number ") + text);
}
}
}
else
{
CapturingGroup capturingGroup4 = (CapturingGroup)hashtable[text];
if (key2 is Reference)
{
((Reference)key2).CapturingGroup = capturingGroup4;
}
else if (key2 is CaptureAssertion)
{
((CaptureAssertion)key2).CapturingGroup = capturingGroup4;
}
else if (key2 is BalancingGroup)
{
((BalancingGroup)key2).Balance = capturingGroup4;
}
}
}
}
public BalancingGroup()
{
this.balance = null;
}