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added Ndesk.Options

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commit 4163ff03acf675c406138c44fd9a01774ba6a4e9 1 parent a6baf82
seuffert authored
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  1. +1,103 −0 XBSlink/Options.cs
1,103 XBSlink/Options.cs
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+//
+// Options.cs
+//
+// Authors:
+// Jonathan Pryor <jpryor@novell.com>
+//
+// Copyright (C) 2008 Novell (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+// Compile With:
+// gmcs -debug+ -r:System.Core Options.cs -o:NDesk.Options.dll
+// gmcs -debug+ -d:LINQ -r:System.Core Options.cs -o:NDesk.Options.dll
+//
+// The LINQ version just changes the implementation of
+// OptionSet.Parse(IEnumerable<string>), and confers no semantic changes.
+
+//
+// A Getopt::Long-inspired option parsing library for C#.
+//
+// NDesk.Options.OptionSet is built upon a key/value table, where the
+// key is a option format string and the value is a delegate that is
+// invoked when the format string is matched.
+//
+// Option format strings:
+// Regex-like BNF Grammar:
+// name: .+
+// type: [=:]
+// sep: ( [^{}]+ | '{' .+ '}' )?
+// aliases: ( name type sep ) ( '|' name type sep )*
+//
+// Each '|'-delimited name is an alias for the associated action. If the
+// format string ends in a '=', it has a required value. If the format
+// string ends in a ':', it has an optional value. If neither '=' or ':'
+// is present, no value is supported. `=' or `:' need only be defined on one
+// alias, but if they are provided on more than one they must be consistent.
+//
+// Each alias portion may also end with a "key/value separator", which is used
+// to split option values if the option accepts > 1 value. If not specified,
+// it defaults to '=' and ':'. If specified, it can be any character except
+// '{' and '}' OR the *string* between '{' and '}'. If no separator should be
+// used (i.e. the separate values should be distinct arguments), then "{}"
+// should be used as the separator.
+//
+// Options are extracted either from the current option by looking for
+// the option name followed by an '=' or ':', or is taken from the
+// following option IFF:
+// - The current option does not contain a '=' or a ':'
+// - The current option requires a value (i.e. not a Option type of ':')
+//
+// The `name' used in the option format string does NOT include any leading
+// option indicator, such as '-', '--', or '/'. All three of these are
+// permitted/required on any named option.
+//
+// Option bundling is permitted so long as:
+// - '-' is used to start the option group
+// - all of the bundled options are a single character
+// - at most one of the bundled options accepts a value, and the value
+// provided starts from the next character to the end of the string.
+//
+// This allows specifying '-a -b -c' as '-abc', and specifying '-D name=value'
+// as '-Dname=value'.
+//
+// Option processing is disabled by specifying "--". All options after "--"
+// are returned by OptionSet.Parse() unchanged and unprocessed.
+//
+// Unprocessed options are returned from OptionSet.Parse().
+//
+// Examples:
+// int verbose = 0;
+// OptionSet p = new OptionSet ()
+// .Add ("v", v => ++verbose)
+// .Add ("name=|value=", v => Console.WriteLine (v));
+// p.Parse (new string[]{"-v", "--v", "/v", "-name=A", "/name", "B", "extra"});
+//
+// The above would parse the argument string array, and would invoke the
+// lambda expression three times, setting `verbose' to 3 when complete.
+// It would also print out "A" and "B" to standard output.
+// The returned array would contain the string "extra".
+//
+// C# 3.0 collection initializers are supported and encouraged:
+// var p = new OptionSet () {
+// { "h|?|help", v => ShowHelp () },
+// };
+//
+// System.ComponentModel.TypeConverter is also supported, allowing the use of
+// custom data types in the callback type; TypeConverter.ConvertFromString()
+// is used to convert the value option to an instance of the specified
+// type:
+//
+// var p = new OptionSet () {
+// { "foo=", (Foo f) => Console.WriteLine (f.ToString ()) },
+// };
+//
+// Random other tidbits:
+// - Boolean options (those w/o '=' or ':' in the option format string)
+// are explicitly enabled if they are followed with '+', and explicitly
+// disabled if they are followed with '-':
+// string a = null;
+// var p = new OptionSet () {
+// { "a", s => a = s },
+// };
+// p.Parse (new string[]{"-a"}); // sets v != null
+// p.Parse (new string[]{"-a+"}); // sets v != null
+// p.Parse (new string[]{"-a-"}); // sets v == null
+//
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Globalization;
+using System.IO;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
+using System.Text;
+using System.Text.RegularExpressions;
+
+#if LINQ
+using System.Linq;
+#endif
+
+#if TEST
+using NDesk.Options;
+#endif
+
+namespace NDesk.Options {
+
+ public class OptionValueCollection : IList, IList<string> {
+
+ List<string> values = new List<string> ();
+ OptionContext c;
+
+ internal OptionValueCollection (OptionContext c)
+ {
+ this.c = c;
+ }
+
+ #region ICollection
+ void ICollection.CopyTo (Array array, int index) {(values as ICollection).CopyTo (array, index);}
+ bool ICollection.IsSynchronized {get {return (values as ICollection).IsSynchronized;}}
+ object ICollection.SyncRoot {get {return (values as ICollection).SyncRoot;}}
+ #endregion
+
+ #region ICollection<T>
+ public void Add (string item) {values.Add (item);}
+ public void Clear () {values.Clear ();}
+ public bool Contains (string item) {return values.Contains (item);}
+ public void CopyTo (string[] array, int arrayIndex) {values.CopyTo (array, arrayIndex);}
+ public bool Remove (string item) {return values.Remove (item);}
+ public int Count {get {return values.Count;}}
+ public bool IsReadOnly {get {return false;}}
+ #endregion
+
+ #region IEnumerable
+ IEnumerator IEnumerable.GetEnumerator () {return values.GetEnumerator ();}
+ #endregion
+
+ #region IEnumerable<T>
+ public IEnumerator<string> GetEnumerator () {return values.GetEnumerator ();}
+ #endregion
+
+ #region IList
+ int IList.Add (object value) {return (values as IList).Add (value);}
+ bool IList.Contains (object value) {return (values as IList).Contains (value);}
+ int IList.IndexOf (object value) {return (values as IList).IndexOf (value);}
+ void IList.Insert (int index, object value) {(values as IList).Insert (index, value);}
+ void IList.Remove (object value) {(values as IList).Remove (value);}
+ void IList.RemoveAt (int index) {(values as IList).RemoveAt (index);}
+ bool IList.IsFixedSize {get {return false;}}
+ object IList.this [int index] {get {return this [index];} set {(values as IList)[index] = value;}}
+ #endregion
+
+ #region IList<T>
+ public int IndexOf (string item) {return values.IndexOf (item);}
+ public void Insert (int index, string item) {values.Insert (index, item);}
+ public void RemoveAt (int index) {values.RemoveAt (index);}
+
+ private void AssertValid (int index)
+ {
+ if (c.Option == null)
+ throw new InvalidOperationException ("OptionContext.Option is null.");
+ if (index >= c.Option.MaxValueCount)
+ throw new ArgumentOutOfRangeException ("index");
+ if (c.Option.OptionValueType == OptionValueType.Required &&
+ index >= values.Count)
+ throw new OptionException (string.Format (
+ c.OptionSet.MessageLocalizer ("Missing required value for option '{0}'."), c.OptionName),
+ c.OptionName);
+ }
+
+ public string this [int index] {
+ get {
+ AssertValid (index);
+ return index >= values.Count ? null : values [index];
+ }
+ set {
+ values [index] = value;
+ }
+ }
+ #endregion
+
+ public List<string> ToList ()
+ {
+ return new List<string> (values);
+ }
+
+ public string[] ToArray ()
+ {
+ return values.ToArray ();
+ }
+
+ public override string ToString ()
+ {
+ return string.Join (", ", values.ToArray ());
+ }
+ }
+
+ public class OptionContext {
+ private Option option;
+ private string name;
+ private int index;
+ private OptionSet set;
+ private OptionValueCollection c;
+
+ public OptionContext (OptionSet set)
+ {
+ this.set = set;
+ this.c = new OptionValueCollection (this);
+ }
+
+ public Option Option {
+ get {return option;}
+ set {option = value;}
+ }
+
+ public string OptionName {
+ get {return name;}
+ set {name = value;}
+ }
+
+ public int OptionIndex {
+ get {return index;}
+ set {index = value;}
+ }
+
+ public OptionSet OptionSet {
+ get {return set;}
+ }
+
+ public OptionValueCollection OptionValues {
+ get {return c;}
+ }
+ }
+
+ public enum OptionValueType {
+ None,
+ Optional,
+ Required,
+ }
+
+ public abstract class Option {
+ string prototype, description;
+ string[] names;
+ OptionValueType type;
+ int count;
+ string[] separators;
+
+ protected Option (string prototype, string description)
+ : this (prototype, description, 1)
+ {
+ }
+
+ protected Option (string prototype, string description, int maxValueCount)
+ {
+ if (prototype == null)
+ throw new ArgumentNullException ("prototype");
+ if (prototype.Length == 0)
+ throw new ArgumentException ("Cannot be the empty string.", "prototype");
+ if (maxValueCount < 0)
+ throw new ArgumentOutOfRangeException ("maxValueCount");
+
+ this.prototype = prototype;
+ this.names = prototype.Split ('|');
+ this.description = description;
+ this.count = maxValueCount;
+ this.type = ParsePrototype ();
+
+ if (this.count == 0 && type != OptionValueType.None)
+ throw new ArgumentException (
+ "Cannot provide maxValueCount of 0 for OptionValueType.Required or " +
+ "OptionValueType.Optional.",
+ "maxValueCount");
+ if (this.type == OptionValueType.None && maxValueCount > 1)
+ throw new ArgumentException (
+ string.Format ("Cannot provide maxValueCount of {0} for OptionValueType.None.", maxValueCount),
+ "maxValueCount");
+ if (Array.IndexOf (names, "<>") >= 0 &&
+ ((names.Length == 1 && this.type != OptionValueType.None) ||
+ (names.Length > 1 && this.MaxValueCount > 1)))
+ throw new ArgumentException (
+ "The default option handler '<>' cannot require values.",
+ "prototype");
+ }
+
+ public string Prototype {get {return prototype;}}
+ public string Description {get {return description;}}
+ public OptionValueType OptionValueType {get {return type;}}
+ public int MaxValueCount {get {return count;}}
+
+ public string[] GetNames ()
+ {
+ return (string[]) names.Clone ();
+ }
+
+ public string[] GetValueSeparators ()
+ {
+ if (separators == null)
+ return new string [0];
+ return (string[]) separators.Clone ();
+ }
+
+ protected static T Parse<T> (string value, OptionContext c)
+ {
+ TypeConverter conv = TypeDescriptor.GetConverter (typeof (T));
+ T t = default (T);
+ try {
+ if (value != null)
+ t = (T) conv.ConvertFromString (value);
+ }
+ catch (Exception e) {
+ throw new OptionException (
+ string.Format (
+ c.OptionSet.MessageLocalizer ("Could not convert string `{0}' to type {1} for option `{2}'."),
+ value, typeof (T).Name, c.OptionName),
+ c.OptionName, e);
+ }
+ return t;
+ }
+
+ internal string[] Names {get {return names;}}
+ internal string[] ValueSeparators {get {return separators;}}
+
+ static readonly char[] NameTerminator = new char[]{'=', ':'};
+
+ private OptionValueType ParsePrototype ()
+ {
+ char type = '\0';
+ List<string> seps = new List<string> ();
+ for (int i = 0; i < names.Length; ++i) {
+ string name = names [i];
+ if (name.Length == 0)
+ throw new ArgumentException ("Empty option names are not supported.", "prototype");
+
+ int end = name.IndexOfAny (NameTerminator);
+ if (end == -1)
+ continue;
+ names [i] = name.Substring (0, end);
+ if (type == '\0' || type == name [end])
+ type = name [end];
+ else
+ throw new ArgumentException (
+ string.Format ("Conflicting option types: '{0}' vs. '{1}'.", type, name [end]),
+ "prototype");
+ AddSeparators (name, end, seps);
+ }
+
+ if (type == '\0')
+ return OptionValueType.None;
+
+ if (count <= 1 && seps.Count != 0)
+ throw new ArgumentException (
+ string.Format ("Cannot provide key/value separators for Options taking {0} value(s).", count),
+ "prototype");
+ if (count > 1) {
+ if (seps.Count == 0)
+ this.separators = new string[]{":", "="};
+ else if (seps.Count == 1 && seps [0].Length == 0)
+ this.separators = null;
+ else
+ this.separators = seps.ToArray ();
+ }
+
+ return type == '=' ? OptionValueType.Required : OptionValueType.Optional;
+ }
+
+ private static void AddSeparators (string name, int end, ICollection<string> seps)
+ {
+ int start = -1;
+ for (int i = end+1; i < name.Length; ++i) {
+ switch (name [i]) {
+ case '{':
+ if (start != -1)
+ throw new ArgumentException (
+ string.Format ("Ill-formed name/value separator found in \"{0}\".", name),
+ "prototype");
+ start = i+1;
+ break;
+ case '}':
+ if (start == -1)
+ throw new ArgumentException (
+ string.Format ("Ill-formed name/value separator found in \"{0}\".", name),
+ "prototype");
+ seps.Add (name.Substring (start, i-start));
+ start = -1;
+ break;
+ default:
+ if (start == -1)
+ seps.Add (name [i].ToString ());
+ break;
+ }
+ }
+ if (start != -1)
+ throw new ArgumentException (
+ string.Format ("Ill-formed name/value separator found in \"{0}\".", name),
+ "prototype");
+ }
+
+ public void Invoke (OptionContext c)
+ {
+ OnParseComplete (c);
+ c.OptionName = null;
+ c.Option = null;
+ c.OptionValues.Clear ();
+ }
+
+ protected abstract void OnParseComplete (OptionContext c);
+
+ public override string ToString ()
+ {
+ return Prototype;
+ }
+ }
+
+ [Serializable]
+ public class OptionException : Exception {
+ private string option;
+
+ public OptionException ()
+ {
+ }
+
+ public OptionException (string message, string optionName)
+ : base (message)
+ {
+ this.option = optionName;
+ }
+
+ public OptionException (string message, string optionName, Exception innerException)
+ : base (message, innerException)
+ {
+ this.option = optionName;
+ }
+
+ protected OptionException (SerializationInfo info, StreamingContext context)
+ : base (info, context)
+ {
+ this.option = info.GetString ("OptionName");
+ }
+
+ public string OptionName {
+ get {return this.option;}
+ }
+
+ [SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
+ public override void GetObjectData (SerializationInfo info, StreamingContext context)
+ {
+ base.GetObjectData (info, context);
+ info.AddValue ("OptionName", option);
+ }
+ }
+
+ public delegate void OptionAction<TKey, TValue> (TKey key, TValue value);
+
+ public class OptionSet : KeyedCollection<string, Option>
+ {
+ public OptionSet ()
+ : this (delegate (string f) {return f;})
+ {
+ }
+
+ public OptionSet (Converter<string, string> localizer)
+ {
+ this.localizer = localizer;
+ }
+
+ Converter<string, string> localizer;
+
+ public Converter<string, string> MessageLocalizer {
+ get {return localizer;}
+ }
+
+ protected override string GetKeyForItem (Option item)
+ {
+ if (item == null)
+ throw new ArgumentNullException ("option");
+ if (item.Names != null && item.Names.Length > 0)
+ return item.Names [0];
+ // This should never happen, as it's invalid for Option to be
+ // constructed w/o any names.
+ throw new InvalidOperationException ("Option has no names!");
+ }
+
+ [Obsolete ("Use KeyedCollection.this[string]")]
+ protected Option GetOptionForName (string option)
+ {
+ if (option == null)
+ throw new ArgumentNullException ("option");
+ try {
+ return base [option];
+ }
+ catch (KeyNotFoundException) {
+ return null;
+ }
+ }
+
+ protected override void InsertItem (int index, Option item)
+ {
+ base.InsertItem (index, item);
+ AddImpl (item);
+ }
+
+ protected override void RemoveItem (int index)
+ {
+ base.RemoveItem (index);
+ Option p = Items [index];
+ // KeyedCollection.RemoveItem() handles the 0th item
+ for (int i = 1; i < p.Names.Length; ++i) {
+ Dictionary.Remove (p.Names [i]);
+ }
+ }
+
+ protected override void SetItem (int index, Option item)
+ {
+ base.SetItem (index, item);
+ RemoveItem (index);
+ AddImpl (item);
+ }
+
+ private void AddImpl (Option option)
+ {
+ if (option == null)
+ throw new ArgumentNullException ("option");
+ List<string> added = new List<string> (option.Names.Length);
+ try {
+ // KeyedCollection.InsertItem/SetItem handle the 0th name.
+ for (int i = 1; i < option.Names.Length; ++i) {
+ Dictionary.Add (option.Names [i], option);
+ added.Add (option.Names [i]);
+ }
+ }
+ catch (Exception) {
+ foreach (string name in added)
+ Dictionary.Remove (name);
+ throw;
+ }
+ }
+
+ public new OptionSet Add (Option option)
+ {
+ base.Add (option);
+ return this;
+ }
+
+ sealed class ActionOption : Option {
+ Action<OptionValueCollection> action;
+
+ public ActionOption (string prototype, string description, int count, Action<OptionValueCollection> action)
+ : base (prototype, description, count)
+ {
+ if (action == null)
+ throw new ArgumentNullException ("action");
+ this.action = action;
+ }
+
+ protected override void OnParseComplete (OptionContext c)
+ {
+ action (c.OptionValues);
+ }
+ }
+
+ public OptionSet Add (string prototype, Action<string> action)
+ {
+ return Add (prototype, null, action);
+ }
+
+ public OptionSet Add (string prototype, string description, Action<string> action)
+ {
+ if (action == null)
+ throw new ArgumentNullException ("action");
+ Option p = new ActionOption (prototype, description, 1,
+ delegate (OptionValueCollection v) { action (v [0]); });
+ base.Add (p);
+ return this;
+ }
+
+ public OptionSet Add (string prototype, OptionAction<string, string> action)
+ {
+ return Add (prototype, null, action);
+ }
+
+ public OptionSet Add (string prototype, string description, OptionAction<string, string> action)
+ {
+ if (action == null)
+ throw new ArgumentNullException ("action");
+ Option p = new ActionOption (prototype, description, 2,
+ delegate (OptionValueCollection v) {action (v [0], v [1]);});
+ base.Add (p);
+ return this;
+ }
+
+ sealed class ActionOption<T> : Option {
+ Action<T> action;
+
+ public ActionOption (string prototype, string description, Action<T> action)
+ : base (prototype, description, 1)
+ {
+ if (action == null)
+ throw new ArgumentNullException ("action");
+ this.action = action;
+ }
+
+ protected override void OnParseComplete (OptionContext c)
+ {
+ action (Parse<T> (c.OptionValues [0], c));
+ }
+ }
+
+ sealed class ActionOption<TKey, TValue> : Option {
+ OptionAction<TKey, TValue> action;
+
+ public ActionOption (string prototype, string description, OptionAction<TKey, TValue> action)
+ : base (prototype, description, 2)
+ {
+ if (action == null)
+ throw new ArgumentNullException ("action");
+ this.action = action;
+ }
+
+ protected override void OnParseComplete (OptionContext c)
+ {
+ action (
+ Parse<TKey> (c.OptionValues [0], c),
+ Parse<TValue> (c.OptionValues [1], c));
+ }
+ }
+
+ public OptionSet Add<T> (string prototype, Action<T> action)
+ {
+ return Add (prototype, null, action);
+ }
+
+ public OptionSet Add<T> (string prototype, string description, Action<T> action)
+ {
+ return Add (new ActionOption<T> (prototype, description, action));
+ }
+
+ public OptionSet Add<TKey, TValue> (string prototype, OptionAction<TKey, TValue> action)
+ {
+ return Add (prototype, null, action);
+ }
+
+ public OptionSet Add<TKey, TValue> (string prototype, string description, OptionAction<TKey, TValue> action)
+ {
+ return Add (new ActionOption<TKey, TValue> (prototype, description, action));
+ }
+
+ protected virtual OptionContext CreateOptionContext ()
+ {
+ return new OptionContext (this);
+ }
+
+#if LINQ
+ public List<string> Parse (IEnumerable<string> arguments)
+ {
+ bool process = true;
+ OptionContext c = CreateOptionContext ();
+ c.OptionIndex = -1;
+ var def = GetOptionForName ("<>");
+ var unprocessed =
+ from argument in arguments
+ where ++c.OptionIndex >= 0 && (process || def != null)
+ ? process
+ ? argument == "--"
+ ? (process = false)
+ : !Parse (argument, c)
+ ? def != null
+ ? Unprocessed (null, def, c, argument)
+ : true
+ : false
+ : def != null
+ ? Unprocessed (null, def, c, argument)
+ : true
+ : true
+ select argument;
+ List<string> r = unprocessed.ToList ();
+ if (c.Option != null)
+ c.Option.Invoke (c);
+ return r;
+ }
+#else
+ public List<string> Parse (IEnumerable<string> arguments)
+ {
+ OptionContext c = CreateOptionContext ();
+ c.OptionIndex = -1;
+ bool process = true;
+ List<string> unprocessed = new List<string> ();
+ Option def = Contains ("<>") ? this ["<>"] : null;
+ foreach (string argument in arguments) {
+ ++c.OptionIndex;
+ if (argument == "--") {
+ process = false;
+ continue;
+ }
+ if (!process) {
+ Unprocessed (unprocessed, def, c, argument);
+ continue;
+ }
+ if (!Parse (argument, c))
+ Unprocessed (unprocessed, def, c, argument);
+ }
+ if (c.Option != null)
+ c.Option.Invoke (c);
+ return unprocessed;
+ }
+#endif
+
+ private static bool Unprocessed (ICollection<string> extra, Option def, OptionContext c, string argument)
+ {
+ if (def == null) {
+ extra.Add (argument);
+ return false;
+ }
+ c.OptionValues.Add (argument);
+ c.Option = def;
+ c.Option.Invoke (c);
+ return false;
+ }
+
+ private readonly Regex ValueOption = new Regex (
+ @"^(?<flag>--|-|/)(?<name>[^:=]+)((?<sep>[:=])(?<value>.*))?$");
+
+ protected bool GetOptionParts (string argument, out string flag, out string name, out string sep, out string value)
+ {
+ if (argument == null)
+ throw new ArgumentNullException ("argument");
+
+ flag = name = sep = value = null;
+ Match m = ValueOption.Match (argument);
+ if (!m.Success) {
+ return false;
+ }
+ flag = m.Groups ["flag"].Value;
+ name = m.Groups ["name"].Value;
+ if (m.Groups ["sep"].Success && m.Groups ["value"].Success) {
+ sep = m.Groups ["sep"].Value;
+ value = m.Groups ["value"].Value;
+ }
+ return true;
+ }
+
+ protected virtual bool Parse (string argument, OptionContext c)
+ {
+ if (c.Option != null) {
+ ParseValue (argument, c);
+ return true;
+ }
+
+ string f, n, s, v;
+ if (!GetOptionParts (argument, out f, out n, out s, out v))
+ return false;
+
+ Option p;
+ if (Contains (n)) {
+ p = this [n];
+ c.OptionName = f + n;
+ c.Option = p;
+ switch (p.OptionValueType) {
+ case OptionValueType.None:
+ c.OptionValues.Add (n);
+ c.Option.Invoke (c);
+ break;
+ case OptionValueType.Optional:
+ case OptionValueType.Required:
+ ParseValue (v, c);
+ break;
+ }
+ return true;
+ }
+ // no match; is it a bool option?
+ if (ParseBool (argument, n, c))
+ return true;
+ // is it a bundled option?
+ if (ParseBundledValue (f, string.Concat (n + s + v), c))
+ return true;
+
+ return false;
+ }
+
+ private void ParseValue (string option, OptionContext c)
+ {
+ if (option != null)
+ foreach (string o in c.Option.ValueSeparators != null
+ ? option.Split (c.Option.ValueSeparators, StringSplitOptions.None)
+ : new string[]{option}) {
+ c.OptionValues.Add (o);
+ }
+ if (c.OptionValues.Count == c.Option.MaxValueCount ||
+ c.Option.OptionValueType == OptionValueType.Optional)
+ c.Option.Invoke (c);
+ else if (c.OptionValues.Count > c.Option.MaxValueCount) {
+ throw new OptionException (localizer (string.Format (
+ "Error: Found {0} option values when expecting {1}.",
+ c.OptionValues.Count, c.Option.MaxValueCount)),
+ c.OptionName);
+ }
+ }
+
+ private bool ParseBool (string option, string n, OptionContext c)
+ {
+ Option p;
+ string rn;
+ if (n.Length >= 1 && (n [n.Length-1] == '+' || n [n.Length-1] == '-') &&
+ Contains ((rn = n.Substring (0, n.Length-1)))) {
+ p = this [rn];
+ string v = n [n.Length-1] == '+' ? option : null;
+ c.OptionName = option;
+ c.Option = p;
+ c.OptionValues.Add (v);
+ p.Invoke (c);
+ return true;
+ }
+ return false;
+ }
+
+ private bool ParseBundledValue (string f, string n, OptionContext c)
+ {
+ if (f != "-")
+ return false;
+ for (int i = 0; i < n.Length; ++i) {
+ Option p;
+ string opt = f + n [i].ToString ();
+ string rn = n [i].ToString ();
+ if (!Contains (rn)) {
+ if (i == 0)
+ return false;
+ throw new OptionException (string.Format (localizer (
+ "Cannot bundle unregistered option '{0}'."), opt), opt);
+ }
+ p = this [rn];
+ switch (p.OptionValueType) {
+ case OptionValueType.None:
+ Invoke (c, opt, n, p);
+ break;
+ case OptionValueType.Optional:
+ case OptionValueType.Required: {
+ string v = n.Substring (i+1);
+ c.Option = p;
+ c.OptionName = opt;
+ ParseValue (v.Length != 0 ? v : null, c);
+ return true;
+ }
+ default:
+ throw new InvalidOperationException ("Unknown OptionValueType: " + p.OptionValueType);
+ }
+ }
+ return true;
+ }
+
+ private static void Invoke (OptionContext c, string name, string value, Option option)
+ {
+ c.OptionName = name;
+ c.Option = option;
+ c.OptionValues.Add (value);
+ option.Invoke (c);
+ }
+
+ private const int OptionWidth = 29;
+
+ public void WriteOptionDescriptions (TextWriter o)
+ {
+ foreach (Option p in this) {
+ int written = 0;
+ if (!WriteOptionPrototype (o, p, ref written))
+ continue;
+
+ if (written < OptionWidth)
+ o.Write (new string (' ', OptionWidth - written));
+ else {
+ o.WriteLine ();
+ o.Write (new string (' ', OptionWidth));
+ }
+
+ List<string> lines = GetLines (localizer (GetDescription (p.Description)));
+ o.WriteLine (lines [0]);
+ string prefix = new string (' ', OptionWidth+2);
+ for (int i = 1; i < lines.Count; ++i) {
+ o.Write (prefix);
+ o.WriteLine (lines [i]);
+ }
+ }
+ }
+
+ bool WriteOptionPrototype (TextWriter o, Option p, ref int written)
+ {
+ string[] names = p.Names;
+
+ int i = GetNextOptionIndex (names, 0);
+ if (i == names.Length)
+ return false;
+
+ if (names [i].Length == 1) {
+ Write (o, ref written, " -");
+ Write (o, ref written, names [0]);
+ }
+ else {
+ Write (o, ref written, " --");
+ Write (o, ref written, names [0]);
+ }
+
+ for ( i = GetNextOptionIndex (names, i+1);
+ i < names.Length; i = GetNextOptionIndex (names, i+1)) {
+ Write (o, ref written, ", ");
+ Write (o, ref written, names [i].Length == 1 ? "-" : "--");
+ Write (o, ref written, names [i]);
+ }
+
+ if (p.OptionValueType == OptionValueType.Optional ||
+ p.OptionValueType == OptionValueType.Required) {
+ if (p.OptionValueType == OptionValueType.Optional) {
+ Write (o, ref written, localizer ("["));
+ }
+ Write (o, ref written, localizer ("=" + GetArgumentName (0, p.MaxValueCount, p.Description)));
+ string sep = p.ValueSeparators != null && p.ValueSeparators.Length > 0
+ ? p.ValueSeparators [0]
+ : " ";
+ for (int c = 1; c < p.MaxValueCount; ++c) {
+ Write (o, ref written, localizer (sep + GetArgumentName (c, p.MaxValueCount, p.Description)));
+ }
+ if (p.OptionValueType == OptionValueType.Optional) {
+ Write (o, ref written, localizer ("]"));
+ }
+ }
+ return true;
+ }
+
+ static int GetNextOptionIndex (string[] names, int i)
+ {
+ while (i < names.Length && names [i] == "<>") {
+ ++i;
+ }
+ return i;
+ }
+
+ static void Write (TextWriter o, ref int n, string s)
+ {
+ n += s.Length;
+ o.Write (s);
+ }
+
+ private static string GetArgumentName (int index, int maxIndex, string description)
+ {
+ if (description == null)
+ return maxIndex == 1 ? "VALUE" : "VALUE" + (index + 1);
+ string[] nameStart;
+ if (maxIndex == 1)
+ nameStart = new string[]{"{0:", "{"};
+ else
+ nameStart = new string[]{"{" + index + ":"};
+ for (int i = 0; i < nameStart.Length; ++i) {
+ int start, j = 0;
+ do {
+ start = description.IndexOf (nameStart [i], j);
+ } while (start >= 0 && j != 0 ? description [j++ - 1] == '{' : false);
+ if (start == -1)
+ continue;
+ int end = description.IndexOf ("}", start);
+ if (end == -1)
+ continue;
+ return description.Substring (start + nameStart [i].Length, end - start - nameStart [i].Length);
+ }
+ return maxIndex == 1 ? "VALUE" : "VALUE" + (index + 1);
+ }
+
+ private static string GetDescription (string description)
+ {
+ if (description == null)
+ return string.Empty;
+ StringBuilder sb = new StringBuilder (description.Length);
+ int start = -1;
+ for (int i = 0; i < description.Length; ++i) {
+ switch (description [i]) {
+ case '{':
+ if (i == start) {
+ sb.Append ('{');
+ start = -1;
+ }
+ else if (start < 0)
+ start = i + 1;
+ break;
+ case '}':
+ if (start < 0) {
+ if ((i+1) == description.Length || description [i+1] != '}')
+ throw new InvalidOperationException ("Invalid option description: " + description);
+ ++i;
+ sb.Append ("}");
+ }
+ else {
+ sb.Append (description.Substring (start, i - start));
+ start = -1;
+ }
+ break;
+ case ':':
+ if (start < 0)
+ goto default;
+ start = i + 1;
+ break;
+ default:
+ if (start < 0)
+ sb.Append (description [i]);
+ break;
+ }
+ }
+ return sb.ToString ();
+ }
+
+ private static List<string> GetLines (string description)
+ {
+ List<string> lines = new List<string> ();
+ if (string.IsNullOrEmpty (description)) {
+ lines.Add (string.Empty);
+ return lines;
+ }
+ int length = 80 - OptionWidth - 2;
+ int start = 0, end;
+ do {
+ end = GetLineEnd (start, length, description);
+ bool cont = false;
+ if (end < description.Length) {
+ char c = description [end];
+ if (c == '-' || (char.IsWhiteSpace (c) && c != '\n'))
+ ++end;
+ else if (c != '\n') {
+ cont = true;
+ --end;
+ }
+ }
+ lines.Add (description.Substring (start, end - start));
+ if (cont) {
+ lines [lines.Count-1] += "-";
+ }
+ start = end;
+ if (start < description.Length && description [start] == '\n')
+ ++start;
+ } while (end < description.Length);
+ return lines;
+ }
+
+ private static int GetLineEnd (int start, int length, string description)
+ {
+ int end = Math.Min (start + length, description.Length);
+ int sep = -1;
+ for (int i = start; i < end; ++i) {
+ switch (description [i]) {
+ case ' ':
+ case '\t':
+ case '\v':
+ case '-':
+ case ',':
+ case '.':
+ case ';':
+ sep = i;
+ break;
+ case '\n':
+ return i;
+ }
+ }
+ if (sep == -1 || end == description.Length)
+ return end;
+ return sep;
+ }
+ }
+}
+
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