RegexMatchCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Regex / System / Text / RegularExpressions / RegexMatchCollection.cs / 1305376 / RegexMatchCollection.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

// The MatchCollection lists the successful matches that 
// result when searching a string for a regular expression. 

namespace System.Text.RegularExpressions { 

    using System.Collections;
    using System.Collections.Generic;
 

    /* 
     * This collection returns a sequence of successful match results, either 
     * from GetMatchCollection() or GetExecuteCollection(). It stops when the
     * first failure is encountered (it does not return the failed match). 
     */
    /// 
    ///    
    ///       Represents the set of names appearing as capturing group 
    ///       names in a regular expression.
    ///     
    ///  
#if !SILVERLIGHT
    [ Serializable() ] 
#endif
    public class MatchCollection : ICollection {
        internal Regex _regex;
#if SILVERLIGHT 
        internal List _matches;
#else 
        internal ArrayList _matches; 
#endif
        internal bool _done; 
        internal String _input;
        internal int _beginning;
        internal int _length;
        internal int _startat; 
        internal int _prevlen;
 
        private static int infinite = 0x7FFFFFFF; 

        /* 
         * Nonpublic constructor
         */
        internal MatchCollection(Regex regex, String input, int beginning, int length, int startat) {
            if (startat < 0 || startat > input.Length) 
                throw new ArgumentOutOfRangeException("startat", SR.GetString(SR.BeginIndexNotNegative));
 
            _regex = regex; 
            _input = input;
            _beginning = beginning; 
            _length = length;
            _startat = startat;
            _prevlen = -1;
#if SILVERLIGHT 
            _matches = new List();
#else 
            _matches = new ArrayList(); 
#endif
            _done = false; 
        }

        internal Match GetMatch(int i) {
            if (i < 0) 
                return null;
 
            if (_matches.Count > i) 
                return (Match)_matches[i];
 
            if (_done)
                return null;

            Match match; 

            do { 
                match = _regex.Run(false, _prevlen, _input, _beginning, _length, _startat); 

                if (!match.Success) { 
                    _done = true;
                    return null;
                }
 
                _matches.Add(match);
 
                _prevlen = match._length; 
                _startat = match._textpos;
 
            } while (_matches.Count <= i);

            return match;
        } 

        ///  
        ///     
        ///       Returns the number of captures.
        ///     
        /// 
        public int Count {
            get {
                if (_done) 
                    return _matches.Count;
 
                GetMatch(infinite); 

                return _matches.Count; 
            }
        }

        ///  
        ///    [To be supplied.]
        ///  
        public Object SyncRoot { 
            get {
                return this; 
            }
        }

        ///  
        ///    [To be supplied.]
        ///  
        public bool IsSynchronized { 
            get {
                return false; 
            }
        }

        ///  
        ///    [To be supplied.]
        ///  
        public bool IsReadOnly { 
            get {
                return true; 
            }
        }

 
        /// 
        ///     
        ///       Returns the ith Match in the collection. 
        ///    
        ///  
        public virtual Match this[int i]
        {
            get {
                Match match; 

                match = GetMatch(i); 
 
                if (match == null)
                    throw new ArgumentOutOfRangeException("i"); 

                return match;
            }
        } 

        ///  
        ///     
        ///       Copies all the elements of the collection to the given array
        ///       starting at the given index. 
        ///    
        /// 
        public void CopyTo(Array array, int arrayIndex) {
            if ((array != null) && (array.Rank != 1)) 
            {
                throw new ArgumentException(SR.GetString(SR.Arg_RankMultiDimNotSupported)); 
            } 

            // property access to force computation of whole array 
            int count = Count;
            try
            {
#if SILVERLIGHT 
                // Array.Copy will check for null.
                Array.Copy(_matches.ToArray(), 0, array, arrayIndex, count); 
#else 
                _matches.CopyTo(array, arrayIndex);
#endif 
            }
            catch (ArrayTypeMismatchException)
            {
                throw new ArgumentException(SR.GetString(SR.Arg_InvalidArrayType)); 
            }
 
        } 

        ///  
        ///    
        ///       Provides an enumerator in the same order as Item[i].
        ///    
        ///  
        public IEnumerator GetEnumerator() {
            return new MatchEnumerator(this); 
        } 
    }
 
    /*
     * This non-public enumerator lists all the group matches.
     * Should it be public?
     */ 
#if !SILVERLIGHT
    [ Serializable() ] 
#endif 
    internal class MatchEnumerator : IEnumerator {
        internal MatchCollection _matchcoll; 
        internal Match _match = null;
        internal int _curindex;
        internal bool _done;
 
        /*
         * Nonpublic constructor 
         */ 
        internal MatchEnumerator(MatchCollection matchcoll) {
            _matchcoll = matchcoll; 
        }

        /*
         * Advance to the next match 
         */
        public bool MoveNext() { 
            if (_done) 
                return false;
 
            _match = _matchcoll.GetMatch(_curindex++);

            if (_match == null) {
                _done = true; 
                return false;
            } 
 
            return true;
        } 

        /*
         * The current match
         */ 
        public Object Current {
            get { 
                if (_match == null) 
                    throw new InvalidOperationException(SR.GetString(SR.EnumNotStarted));
                return _match; 
            }
        }

        /* 
         * Position before the first item
         */ 
        public void Reset() { 
            _curindex = 0;
            _done = false; 
            _match = null;
        }
    }
 

 
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

// The MatchCollection lists the successful matches that 
// result when searching a string for a regular expression. 

namespace System.Text.RegularExpressions { 

    using System.Collections;
    using System.Collections.Generic;
 

    /* 
     * This collection returns a sequence of successful match results, either 
     * from GetMatchCollection() or GetExecuteCollection(). It stops when the
     * first failure is encountered (it does not return the failed match). 
     */
    /// 
    ///    
    ///       Represents the set of names appearing as capturing group 
    ///       names in a regular expression.
    ///     
    ///  
#if !SILVERLIGHT
    [ Serializable() ] 
#endif
    public class MatchCollection : ICollection {
        internal Regex _regex;
#if SILVERLIGHT 
        internal List _matches;
#else 
        internal ArrayList _matches; 
#endif
        internal bool _done; 
        internal String _input;
        internal int _beginning;
        internal int _length;
        internal int _startat; 
        internal int _prevlen;
 
        private static int infinite = 0x7FFFFFFF; 

        /* 
         * Nonpublic constructor
         */
        internal MatchCollection(Regex regex, String input, int beginning, int length, int startat) {
            if (startat < 0 || startat > input.Length) 
                throw new ArgumentOutOfRangeException("startat", SR.GetString(SR.BeginIndexNotNegative));
 
            _regex = regex; 
            _input = input;
            _beginning = beginning; 
            _length = length;
            _startat = startat;
            _prevlen = -1;
#if SILVERLIGHT 
            _matches = new List();
#else 
            _matches = new ArrayList(); 
#endif
            _done = false; 
        }

        internal Match GetMatch(int i) {
            if (i < 0) 
                return null;
 
            if (_matches.Count > i) 
                return (Match)_matches[i];
 
            if (_done)
                return null;

            Match match; 

            do { 
                match = _regex.Run(false, _prevlen, _input, _beginning, _length, _startat); 

                if (!match.Success) { 
                    _done = true;
                    return null;
                }
 
                _matches.Add(match);
 
                _prevlen = match._length; 
                _startat = match._textpos;
 
            } while (_matches.Count <= i);

            return match;
        } 

        ///  
        ///     
        ///       Returns the number of captures.
        ///     
        /// 
        public int Count {
            get {
                if (_done) 
                    return _matches.Count;
 
                GetMatch(infinite); 

                return _matches.Count; 
            }
        }

        ///  
        ///    [To be supplied.]
        ///  
        public Object SyncRoot { 
            get {
                return this; 
            }
        }

        ///  
        ///    [To be supplied.]
        ///  
        public bool IsSynchronized { 
            get {
                return false; 
            }
        }

        ///  
        ///    [To be supplied.]
        ///  
        public bool IsReadOnly { 
            get {
                return true; 
            }
        }

 
        /// 
        ///     
        ///       Returns the ith Match in the collection. 
        ///    
        ///  
        public virtual Match this[int i]
        {
            get {
                Match match; 

                match = GetMatch(i); 
 
                if (match == null)
                    throw new ArgumentOutOfRangeException("i"); 

                return match;
            }
        } 

        ///  
        ///     
        ///       Copies all the elements of the collection to the given array
        ///       starting at the given index. 
        ///    
        /// 
        public void CopyTo(Array array, int arrayIndex) {
            if ((array != null) && (array.Rank != 1)) 
            {
                throw new ArgumentException(SR.GetString(SR.Arg_RankMultiDimNotSupported)); 
            } 

            // property access to force computation of whole array 
            int count = Count;
            try
            {
#if SILVERLIGHT 
                // Array.Copy will check for null.
                Array.Copy(_matches.ToArray(), 0, array, arrayIndex, count); 
#else 
                _matches.CopyTo(array, arrayIndex);
#endif 
            }
            catch (ArrayTypeMismatchException)
            {
                throw new ArgumentException(SR.GetString(SR.Arg_InvalidArrayType)); 
            }
 
        } 

        ///  
        ///    
        ///       Provides an enumerator in the same order as Item[i].
        ///    
        ///  
        public IEnumerator GetEnumerator() {
            return new MatchEnumerator(this); 
        } 
    }
 
    /*
     * This non-public enumerator lists all the group matches.
     * Should it be public?
     */ 
#if !SILVERLIGHT
    [ Serializable() ] 
#endif 
    internal class MatchEnumerator : IEnumerator {
        internal MatchCollection _matchcoll; 
        internal Match _match = null;
        internal int _curindex;
        internal bool _done;
 
        /*
         * Nonpublic constructor 
         */ 
        internal MatchEnumerator(MatchCollection matchcoll) {
            _matchcoll = matchcoll; 
        }

        /*
         * Advance to the next match 
         */
        public bool MoveNext() { 
            if (_done) 
                return false;
 
            _match = _matchcoll.GetMatch(_curindex++);

            if (_match == null) {
                _done = true; 
                return false;
            } 
 
            return true;
        } 

        /*
         * The current match
         */ 
        public Object Current {
            get { 
                if (_match == null) 
                    throw new InvalidOperationException(SR.GetString(SR.EnumNotStarted));
                return _match; 
            }
        }

        /* 
         * Position before the first item
         */ 
        public void Reset() { 
            _curindex = 0;
            _done = false; 
            _match = null;
        }
    }
 

 
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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