Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1452 | chris | 1 | // |
| 2 | // Options.cs |
||
| 3 | // |
||
| 4 | // Authors: |
||
| 5 | // Jonathan Pryor <jpryor@novell.com> |
||
| 6 | // |
||
| 7 | // Copyright (C) 2008 Novell (http://www.novell.com) |
||
| 8 | // |
||
| 9 | // Permission is hereby granted, free of charge, to any person obtaining |
||
| 10 | // a copy of this software and associated documentation files (the |
||
| 11 | // "Software"), to deal in the Software without restriction, including |
||
| 12 | // without limitation the rights to use, copy, modify, merge, publish, |
||
| 13 | // distribute, sublicense, and/or sell copies of the Software, and to |
||
| 14 | // permit persons to whom the Software is furnished to do so, subject to |
||
| 15 | // the following conditions: |
||
| 16 | // |
||
| 17 | // The above copyright notice and this permission notice shall be |
||
| 18 | // included in all copies or substantial portions of the Software. |
||
| 19 | // |
||
| 20 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
||
| 21 | // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
||
| 22 | // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
||
| 23 | // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
||
| 24 | // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
||
| 25 | // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
||
| 26 | // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
||
| 27 | // |
||
| 28 | |||
| 29 | // Compile With: |
||
| 30 | // gmcs -debug+ -r:System.Core Options.cs -o:NDesk.Options.dll |
||
| 31 | // gmcs -debug+ -d:LINQ -r:System.Core Options.cs -o:NDesk.Options.dll |
||
| 32 | // |
||
| 33 | // The LINQ version just changes the implementation of |
||
| 34 | // OptionSet.Parse(IEnumerable<string>), and confers no semantic changes. |
||
| 35 | |||
| 36 | // |
||
| 37 | // A Getopt::Long-inspired option parsing library for C#. |
||
| 38 | // |
||
| 39 | // NDesk.Options.OptionSet is built upon a key/value table, where the |
||
| 40 | // key is a option format string and the value is a delegate that is |
||
| 41 | // invoked when the format string is matched. |
||
| 42 | // |
||
| 43 | // Option format strings: |
||
| 44 | // Regex-like BNF Grammar: |
||
| 45 | // name: .+ |
||
| 46 | // type: [=:] |
||
| 47 | // sep: ( [^{}]+ | '{' .+ '}' )? |
||
| 48 | // aliases: ( name type sep ) ( '|' name type sep )* |
||
| 49 | // |
||
| 50 | // Each '|'-delimited name is an alias for the associated action. If the |
||
| 51 | // format string ends in a '=', it has a required value. If the format |
||
| 52 | // string ends in a ':', it has an optional value. If neither '=' or ':' |
||
| 53 | // is present, no value is supported. `=' or `:' need only be defined on one |
||
| 54 | // alias, but if they are provided on more than one they must be consistent. |
||
| 55 | // |
||
| 56 | // Each alias portion may also end with a "key/value separator", which is used |
||
| 57 | // to split option values if the option accepts > 1 value. If not specified, |
||
| 58 | // it defaults to '=' and ':'. If specified, it can be any character except |
||
| 59 | // '{' and '}' OR the *string* between '{' and '}'. If no separator should be |
||
| 60 | // used (i.e. the separate values should be distinct arguments), then "{}" |
||
| 61 | // should be used as the separator. |
||
| 62 | // |
||
| 63 | // Options are extracted either from the current option by looking for |
||
| 64 | // the option name followed by an '=' or ':', or is taken from the |
||
| 65 | // following option IFF: |
||
| 66 | // - The current option does not contain a '=' or a ':' |
||
| 67 | // - The current option requires a value (i.e. not a Option type of ':') |
||
| 68 | // |
||
| 69 | // The `name' used in the option format string does NOT include any leading |
||
| 70 | // option indicator, such as '-', '--', or '/'. All three of these are |
||
| 71 | // permitted/required on any named option. |
||
| 72 | // |
||
| 73 | // Option bundling is permitted so long as: |
||
| 74 | // - '-' is used to start the option group |
||
| 75 | // - all of the bundled options are a single character |
||
| 76 | // - at most one of the bundled options accepts a value, and the value |
||
| 77 | // provided starts from the next character to the end of the string. |
||
| 78 | // |
||
| 79 | // This allows specifying '-a -b -c' as '-abc', and specifying '-D name=value' |
||
| 80 | // as '-Dname=value'. |
||
| 81 | // |
||
| 82 | // Option processing is disabled by specifying "--". All options after "--" |
||
| 83 | // are returned by OptionSet.Parse() unchanged and unprocessed. |
||
| 84 | // |
||
| 85 | // Unprocessed options are returned from OptionSet.Parse(). |
||
| 86 | // |
||
| 87 | // Examples: |
||
| 88 | // int verbose = 0; |
||
| 89 | // OptionSet p = new OptionSet () |
||
| 90 | // .Add ("v", v => ++verbose) |
||
| 91 | // .Add ("name=|value=", v => Console.WriteLine (v)); |
||
| 92 | // p.Parse (new string[]{"-v", "--v", "/v", "-name=A", "/name", "B", "extra"}); |
||
| 93 | // |
||
| 94 | // The above would parse the argument string array, and would invoke the |
||
| 95 | // lambda expression three times, setting `verbose' to 3 when complete. |
||
| 96 | // It would also print out "A" and "B" to standard output. |
||
| 97 | // The returned array would contain the string "extra". |
||
| 98 | // |
||
| 99 | // C# 3.0 collection initializers are supported and encouraged: |
||
| 100 | // var p = new OptionSet () { |
||
| 101 | // { "h|?|help", v => ShowHelp () }, |
||
| 102 | // }; |
||
| 103 | // |
||
| 104 | // System.ComponentModel.TypeConverter is also supported, allowing the use of |
||
| 105 | // custom data types in the callback type; TypeConverter.ConvertFromString() |
||
| 106 | // is used to convert the value option to an instance of the specified |
||
| 107 | // type: |
||
| 108 | // |
||
| 109 | // var p = new OptionSet () { |
||
| 110 | // { "foo=", (Foo f) => Console.WriteLine (f.ToString ()) }, |
||
| 111 | // }; |
||
| 112 | // |
||
| 113 | // Random other tidbits: |
||
| 114 | // - Boolean options (those w/o '=' or ':' in the option format string) |
||
| 115 | // are explicitly enabled if they are followed with '+', and explicitly |
||
| 116 | // disabled if they are followed with '-': |
||
| 117 | // string a = null; |
||
| 118 | // var p = new OptionSet () { |
||
| 119 | // { "a", s => a = s }, |
||
| 120 | // }; |
||
| 121 | // p.Parse (new string[]{"-a"}); // sets v != null |
||
| 122 | // p.Parse (new string[]{"-a+"}); // sets v != null |
||
| 123 | // p.Parse (new string[]{"-a-"}); // sets v == null |
||
| 124 | // |
||
| 125 | |||
| 126 | using System; |
||
| 127 | using System.Collections; |
||
| 128 | using System.Collections.Generic; |
||
| 129 | using System.Collections.ObjectModel; |
||
| 130 | using System.ComponentModel; |
||
| 131 | using System.Globalization; |
||
| 132 | using System.IO; |
||
| 133 | using System.Runtime.Serialization; |
||
| 134 | using System.Security.Permissions; |
||
| 135 | using System.Text; |
||
| 136 | using System.Text.RegularExpressions; |
||
| 137 | |||
| 138 | #if LINQ |
||
| 139 | using System.Linq; |
||
| 140 | #endif |
||
| 141 | |||
| 142 | #if TEST |
||
| 143 | using NDesk.Options; |
||
| 144 | #endif |
||
| 145 | |||
| 146 | #if NDESK_OPTIONS |
||
| 147 | namespace NDesk.Options |
||
| 148 | #else |
||
| 149 | namespace Mono.Options |
||
| 150 | #endif |
||
| 151 | { |
||
| 152 | public class OptionValueCollection : IList, IList<string> { |
||
| 153 | |||
| 154 | List<string> values = new List<string> (); |
||
| 155 | OptionContext c; |
||
| 156 | |||
| 157 | internal OptionValueCollection (OptionContext c) |
||
| 158 | { |
||
| 159 | this.c = c; |
||
| 160 | } |
||
| 161 | |||
| 162 | #region ICollection |
||
| 163 | void ICollection.CopyTo (Array array, int index) {(values as ICollection).CopyTo (array, index);} |
||
| 164 | bool ICollection.IsSynchronized {get {return (values as ICollection).IsSynchronized;}} |
||
| 165 | object ICollection.SyncRoot {get {return (values as ICollection).SyncRoot;}} |
||
| 166 | #endregion |
||
| 167 | |||
| 168 | #region ICollection<T> |
||
| 169 | public void Add (string item) {values.Add (item);} |
||
| 170 | public void Clear () {values.Clear ();} |
||
| 171 | public bool Contains (string item) {return values.Contains (item);} |
||
| 172 | public void CopyTo (string[] array, int arrayIndex) {values.CopyTo (array, arrayIndex);} |
||
| 173 | public bool Remove (string item) {return values.Remove (item);} |
||
| 174 | public int Count {get {return values.Count;}} |
||
| 175 | public bool IsReadOnly {get {return false;}} |
||
| 176 | #endregion |
||
| 177 | |||
| 178 | #region IEnumerable |
||
| 179 | IEnumerator IEnumerable.GetEnumerator () {return values.GetEnumerator ();} |
||
| 180 | #endregion |
||
| 181 | |||
| 182 | #region IEnumerable<T> |
||
| 183 | public IEnumerator<string> GetEnumerator () {return values.GetEnumerator ();} |
||
| 184 | #endregion |
||
| 185 | |||
| 186 | #region IList |
||
| 187 | int IList.Add (object value) {return (values as IList).Add (value);} |
||
| 188 | bool IList.Contains (object value) {return (values as IList).Contains (value);} |
||
| 189 | int IList.IndexOf (object value) {return (values as IList).IndexOf (value);} |
||
| 190 | void IList.Insert (int index, object value) {(values as IList).Insert (index, value);} |
||
| 191 | void IList.Remove (object value) {(values as IList).Remove (value);} |
||
| 192 | void IList.RemoveAt (int index) {(values as IList).RemoveAt (index);} |
||
| 193 | bool IList.IsFixedSize {get {return false;}} |
||
| 194 | object IList.this [int index] {get {return this [index];} set {(values as IList)[index] = value;}} |
||
| 195 | #endregion |
||
| 196 | |||
| 197 | #region IList<T> |
||
| 198 | public int IndexOf (string item) {return values.IndexOf (item);} |
||
| 199 | public void Insert (int index, string item) {values.Insert (index, item);} |
||
| 200 | public void RemoveAt (int index) {values.RemoveAt (index);} |
||
| 201 | |||
| 202 | private void AssertValid (int index) |
||
| 203 | { |
||
| 204 | if (c.Option == null) |
||
| 205 | throw new InvalidOperationException ("OptionContext.Option is null."); |
||
| 206 | if (index >= c.Option.MaxValueCount) |
||
| 207 | throw new ArgumentOutOfRangeException ("index"); |
||
| 208 | if (c.Option.OptionValueType == OptionValueType.Required && |
||
| 209 | index >= values.Count) |
||
| 210 | throw new OptionException (string.Format ( |
||
| 211 | c.OptionSet.MessageLocalizer ("Missing required value for option '{0}'."), c.OptionName), |
||
| 212 | c.OptionName); |
||
| 213 | } |
||
| 214 | |||
| 215 | public string this [int index] { |
||
| 216 | get { |
||
| 217 | AssertValid (index); |
||
| 218 | return index >= values.Count ? null : values [index]; |
||
| 219 | } |
||
| 220 | set { |
||
| 221 | values [index] = value; |
||
| 222 | } |
||
| 223 | } |
||
| 224 | #endregion |
||
| 225 | |||
| 226 | public List<string> ToList () |
||
| 227 | { |
||
| 228 | return new List<string> (values); |
||
| 229 | } |
||
| 230 | |||
| 231 | public string[] ToArray () |
||
| 232 | { |
||
| 233 | return values.ToArray (); |
||
| 234 | } |
||
| 235 | |||
| 236 | public override string ToString () |
||
| 237 | { |
||
| 238 | return string.Join (", ", values.ToArray ()); |
||
| 239 | } |
||
| 240 | } |
||
| 241 | |||
| 242 | public class OptionContext { |
||
| 243 | private Option option; |
||
| 244 | private string name; |
||
| 245 | private int index; |
||
| 246 | private OptionSet set; |
||
| 247 | private OptionValueCollection c; |
||
| 248 | |||
| 249 | public OptionContext (OptionSet set) |
||
| 250 | { |
||
| 251 | this.set = set; |
||
| 252 | this.c = new OptionValueCollection (this); |
||
| 253 | } |
||
| 254 | |||
| 255 | public Option Option { |
||
| 256 | get {return option;} |
||
| 257 | set {option = value;} |
||
| 258 | } |
||
| 259 | |||
| 260 | public string OptionName { |
||
| 261 | get {return name;} |
||
| 262 | set {name = value;} |
||
| 263 | } |
||
| 264 | |||
| 265 | public int OptionIndex { |
||
| 266 | get {return index;} |
||
| 267 | set {index = value;} |
||
| 268 | } |
||
| 269 | |||
| 270 | public OptionSet OptionSet { |
||
| 271 | get {return set;} |
||
| 272 | } |
||
| 273 | |||
| 274 | public OptionValueCollection OptionValues { |
||
| 275 | get {return c;} |
||
| 276 | } |
||
| 277 | } |
||
| 278 | |||
| 279 | public enum OptionValueType { |
||
| 280 | None, |
||
| 281 | Optional, |
||
| 282 | Required, |
||
| 283 | } |
||
| 284 | |||
| 285 | public abstract class Option { |
||
| 286 | string prototype, description; |
||
| 287 | string[] names; |
||
| 288 | OptionValueType type; |
||
| 289 | int count; |
||
| 290 | string[] separators; |
||
| 291 | |||
| 292 | protected Option (string prototype, string description) |
||
| 293 | : this (prototype, description, 1) |
||
| 294 | { |
||
| 295 | } |
||
| 296 | |||
| 297 | protected Option (string prototype, string description, int maxValueCount) |
||
| 298 | { |
||
| 299 | if (prototype == null) |
||
| 300 | throw new ArgumentNullException ("prototype"); |
||
| 301 | if (prototype.Length == 0) |
||
| 302 | throw new ArgumentException ("Cannot be the empty string.", "prototype"); |
||
| 303 | if (maxValueCount < 0) |
||
| 304 | throw new ArgumentOutOfRangeException ("maxValueCount"); |
||
| 305 | |||
| 306 | this.prototype = prototype; |
||
| 307 | this.names = prototype.Split ('|'); |
||
| 308 | this.description = description; |
||
| 309 | this.count = maxValueCount; |
||
| 310 | this.type = ParsePrototype (); |
||
| 311 | |||
| 312 | if (this.count == 0 && type != OptionValueType.None) |
||
| 313 | throw new ArgumentException ( |
||
| 314 | "Cannot provide maxValueCount of 0 for OptionValueType.Required or " + |
||
| 315 | "OptionValueType.Optional.", |
||
| 316 | "maxValueCount"); |
||
| 317 | if (this.type == OptionValueType.None && maxValueCount > 1) |
||
| 318 | throw new ArgumentException ( |
||
| 319 | string.Format ("Cannot provide maxValueCount of {0} for OptionValueType.None.", maxValueCount), |
||
| 320 | "maxValueCount"); |
||
| 321 | if (Array.IndexOf (names, "<>") >= 0 && |
||
| 322 | ((names.Length == 1 && this.type != OptionValueType.None) || |
||
| 323 | (names.Length > 1 && this.MaxValueCount > 1))) |
||
| 324 | throw new ArgumentException ( |
||
| 325 | "The default option handler '<>' cannot require values.", |
||
| 326 | "prototype"); |
||
| 327 | } |
||
| 328 | |||
| 329 | public string Prototype {get {return prototype;}} |
||
| 330 | public string Description {get {return description;}} |
||
| 331 | public OptionValueType OptionValueType {get {return type;}} |
||
| 332 | public int MaxValueCount {get {return count;}} |
||
| 333 | |||
| 334 | public string[] GetNames () |
||
| 335 | { |
||
| 336 | return (string[]) names.Clone (); |
||
| 337 | } |
||
| 338 | |||
| 339 | public string[] GetValueSeparators () |
||
| 340 | { |
||
| 341 | if (separators == null) |
||
| 342 | return new string [0]; |
||
| 343 | return (string[]) separators.Clone (); |
||
| 344 | } |
||
| 345 | |||
| 346 | protected static T Parse<T> (string value, OptionContext c) |
||
| 347 | { |
||
| 348 | Type tt = typeof (T); |
||
| 349 | bool nullable = tt.IsValueType && tt.IsGenericType && |
||
| 350 | !tt.IsGenericTypeDefinition && |
||
| 351 | tt.GetGenericTypeDefinition () == typeof (Nullable<>); |
||
| 352 | Type targetType = nullable ? tt.GetGenericArguments () [0] : typeof (T); |
||
| 353 | TypeConverter conv = TypeDescriptor.GetConverter (targetType); |
||
| 354 | T t = default (T); |
||
| 355 | try { |
||
| 356 | if (value != null) |
||
| 357 | t = (T) conv.ConvertFromString (value); |
||
| 358 | } |
||
| 359 | catch (Exception e) { |
||
| 360 | throw new OptionException ( |
||
| 361 | string.Format ( |
||
| 362 | c.OptionSet.MessageLocalizer ("Could not convert string `{0}' to type {1} for option `{2}'."), |
||
| 363 | value, targetType.Name, c.OptionName), |
||
| 364 | c.OptionName, e); |
||
| 365 | } |
||
| 366 | return t; |
||
| 367 | } |
||
| 368 | |||
| 369 | internal string[] Names {get {return names;}} |
||
| 370 | internal string[] ValueSeparators {get {return separators;}} |
||
| 371 | |||
| 372 | static readonly char[] NameTerminator = new char[]{'=', ':'}; |
||
| 373 | |||
| 374 | private OptionValueType ParsePrototype () |
||
| 375 | { |
||
| 376 | char type = '\0'; |
||
| 377 | List<string> seps = new List<string> (); |
||
| 378 | for (int i = 0; i < names.Length; ++i) { |
||
| 379 | string name = names [i]; |
||
| 380 | if (name.Length == 0) |
||
| 381 | throw new ArgumentException ("Empty option names are not supported.", "prototype"); |
||
| 382 | |||
| 383 | int end = name.IndexOfAny (NameTerminator); |
||
| 384 | if (end == -1) |
||
| 385 | continue; |
||
| 386 | names [i] = name.Substring (0, end); |
||
| 387 | if (type == '\0' || type == name [end]) |
||
| 388 | type = name [end]; |
||
| 389 | else |
||
| 390 | throw new ArgumentException ( |
||
| 391 | string.Format ("Conflicting option types: '{0}' vs. '{1}'.", type, name [end]), |
||
| 392 | "prototype"); |
||
| 393 | AddSeparators (name, end, seps); |
||
| 394 | } |
||
| 395 | |||
| 396 | if (type == '\0') |
||
| 397 | return OptionValueType.None; |
||
| 398 | |||
| 399 | if (count <= 1 && seps.Count != 0) |
||
| 400 | throw new ArgumentException ( |
||
| 401 | string.Format ("Cannot provide key/value separators for Options taking {0} value(s).", count), |
||
| 402 | "prototype"); |
||
| 403 | if (count > 1) { |
||
| 404 | if (seps.Count == 0) |
||
| 405 | this.separators = new string[]{":", "="}; |
||
| 406 | else if (seps.Count == 1 && seps [0].Length == 0) |
||
| 407 | this.separators = null; |
||
| 408 | else |
||
| 409 | this.separators = seps.ToArray (); |
||
| 410 | } |
||
| 411 | |||
| 412 | return type == '=' ? OptionValueType.Required : OptionValueType.Optional; |
||
| 413 | } |
||
| 414 | |||
| 415 | private static void AddSeparators (string name, int end, ICollection<string> seps) |
||
| 416 | { |
||
| 417 | int start = -1; |
||
| 418 | for (int i = end+1; i < name.Length; ++i) { |
||
| 419 | switch (name [i]) { |
||
| 420 | case '{': |
||
| 421 | if (start != -1) |
||
| 422 | throw new ArgumentException ( |
||
| 423 | string.Format ("Ill-formed name/value separator found in \"{0}\".", name), |
||
| 424 | "prototype"); |
||
| 425 | start = i+1; |
||
| 426 | break; |
||
| 427 | case '}': |
||
| 428 | if (start == -1) |
||
| 429 | throw new ArgumentException ( |
||
| 430 | string.Format ("Ill-formed name/value separator found in \"{0}\".", name), |
||
| 431 | "prototype"); |
||
| 432 | seps.Add (name.Substring (start, i-start)); |
||
| 433 | start = -1; |
||
| 434 | break; |
||
| 435 | default: |
||
| 436 | if (start == -1) |
||
| 437 | seps.Add (name [i].ToString ()); |
||
| 438 | break; |
||
| 439 | } |
||
| 440 | } |
||
| 441 | if (start != -1) |
||
| 442 | throw new ArgumentException ( |
||
| 443 | string.Format ("Ill-formed name/value separator found in \"{0}\".", name), |
||
| 444 | "prototype"); |
||
| 445 | } |
||
| 446 | |||
| 447 | public void Invoke (OptionContext c) |
||
| 448 | { |
||
| 449 | OnParseComplete (c); |
||
| 450 | c.OptionName = null; |
||
| 451 | c.Option = null; |
||
| 452 | c.OptionValues.Clear (); |
||
| 453 | } |
||
| 454 | |||
| 455 | protected abstract void OnParseComplete (OptionContext c); |
||
| 456 | |||
| 457 | public override string ToString () |
||
| 458 | { |
||
| 459 | return Prototype; |
||
| 460 | } |
||
| 461 | } |
||
| 462 | |||
| 463 | [Serializable] |
||
| 464 | public class OptionException : Exception { |
||
| 465 | private string option; |
||
| 466 | |||
| 467 | public OptionException () |
||
| 468 | { |
||
| 469 | } |
||
| 470 | |||
| 471 | public OptionException (string message, string optionName) |
||
| 472 | : base (message) |
||
| 473 | { |
||
| 474 | this.option = optionName; |
||
| 475 | } |
||
| 476 | |||
| 477 | public OptionException (string message, string optionName, Exception innerException) |
||
| 478 | : base (message, innerException) |
||
| 479 | { |
||
| 480 | this.option = optionName; |
||
| 481 | } |
||
| 482 | |||
| 483 | protected OptionException (SerializationInfo info, StreamingContext context) |
||
| 484 | : base (info, context) |
||
| 485 | { |
||
| 486 | this.option = info.GetString ("OptionName"); |
||
| 487 | } |
||
| 488 | |||
| 489 | public string OptionName { |
||
| 490 | get {return this.option;} |
||
| 491 | } |
||
| 492 | |||
| 493 | [SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)] |
||
| 494 | public override void GetObjectData (SerializationInfo info, StreamingContext context) |
||
| 495 | { |
||
| 496 | base.GetObjectData (info, context); |
||
| 497 | info.AddValue ("OptionName", option); |
||
| 498 | } |
||
| 499 | } |
||
| 500 | |||
| 501 | public delegate void OptionAction<TKey, TValue> (TKey key, TValue value); |
||
| 502 | |||
| 503 | public class OptionSet : KeyedCollection<string, Option> |
||
| 504 | { |
||
| 505 | public OptionSet () |
||
| 506 | : this (delegate (string f) {return f;}) |
||
| 507 | { |
||
| 508 | } |
||
| 509 | |||
| 510 | public OptionSet (Converter<string, string> localizer) |
||
| 511 | { |
||
| 512 | this.localizer = localizer; |
||
| 513 | } |
||
| 514 | |||
| 515 | Converter<string, string> localizer; |
||
| 516 | |||
| 517 | public Converter<string, string> MessageLocalizer { |
||
| 518 | get {return localizer;} |
||
| 519 | } |
||
| 520 | |||
| 521 | protected override string GetKeyForItem (Option item) |
||
| 522 | { |
||
| 523 | if (item == null) |
||
| 524 | throw new ArgumentNullException ("option"); |
||
| 525 | if (item.Names != null && item.Names.Length > 0) |
||
| 526 | return item.Names [0]; |
||
| 527 | // This should never happen, as it's invalid for Option to be |
||
| 528 | // constructed w/o any names. |
||
| 529 | throw new InvalidOperationException ("Option has no names!"); |
||
| 530 | } |
||
| 531 | |||
| 532 | [Obsolete ("Use KeyedCollection.this[string]")] |
||
| 533 | protected Option GetOptionForName (string option) |
||
| 534 | { |
||
| 535 | if (option == null) |
||
| 536 | throw new ArgumentNullException ("option"); |
||
| 537 | try { |
||
| 538 | return base [option]; |
||
| 539 | } |
||
| 540 | catch (KeyNotFoundException) { |
||
| 541 | return null; |
||
| 542 | } |
||
| 543 | } |
||
| 544 | |||
| 545 | protected override void InsertItem (int index, Option item) |
||
| 546 | { |
||
| 547 | base.InsertItem (index, item); |
||
| 548 | AddImpl (item); |
||
| 549 | } |
||
| 550 | |||
| 551 | protected override void RemoveItem (int index) |
||
| 552 | { |
||
| 553 | base.RemoveItem (index); |
||
| 554 | Option p = Items [index]; |
||
| 555 | // KeyedCollection.RemoveItem() handles the 0th item |
||
| 556 | for (int i = 1; i < p.Names.Length; ++i) { |
||
| 557 | Dictionary.Remove (p.Names [i]); |
||
| 558 | } |
||
| 559 | } |
||
| 560 | |||
| 561 | protected override void SetItem (int index, Option item) |
||
| 562 | { |
||
| 563 | base.SetItem (index, item); |
||
| 564 | RemoveItem (index); |
||
| 565 | AddImpl (item); |
||
| 566 | } |
||
| 567 | |||
| 568 | private void AddImpl (Option option) |
||
| 569 | { |
||
| 570 | if (option == null) |
||
| 571 | throw new ArgumentNullException ("option"); |
||
| 572 | List<string> added = new List<string> (option.Names.Length); |
||
| 573 | try { |
||
| 574 | // KeyedCollection.InsertItem/SetItem handle the 0th name. |
||
| 575 | for (int i = 1; i < option.Names.Length; ++i) { |
||
| 576 | Dictionary.Add (option.Names [i], option); |
||
| 577 | added.Add (option.Names [i]); |
||
| 578 | } |
||
| 579 | } |
||
| 580 | catch (Exception) { |
||
| 581 | foreach (string name in added) |
||
| 582 | Dictionary.Remove (name); |
||
| 583 | throw; |
||
| 584 | } |
||
| 585 | } |
||
| 586 | |||
| 587 | public new OptionSet Add (Option option) |
||
| 588 | { |
||
| 589 | base.Add (option); |
||
| 590 | return this; |
||
| 591 | } |
||
| 592 | |||
| 593 | sealed class ActionOption : Option { |
||
| 594 | Action<OptionValueCollection> action; |
||
| 595 | |||
| 596 | public ActionOption (string prototype, string description, int count, Action<OptionValueCollection> action) |
||
| 597 | : base (prototype, description, count) |
||
| 598 | { |
||
| 599 | if (action == null) |
||
| 600 | throw new ArgumentNullException ("action"); |
||
| 601 | this.action = action; |
||
| 602 | } |
||
| 603 | |||
| 604 | protected override void OnParseComplete (OptionContext c) |
||
| 605 | { |
||
| 606 | action (c.OptionValues); |
||
| 607 | } |
||
| 608 | } |
||
| 609 | |||
| 610 | public OptionSet Add (string prototype, Action<string> action) |
||
| 611 | { |
||
| 612 | return Add (prototype, null, action); |
||
| 613 | } |
||
| 614 | |||
| 615 | public OptionSet Add (string prototype, string description, Action<string> action) |
||
| 616 | { |
||
| 617 | if (action == null) |
||
| 618 | throw new ArgumentNullException ("action"); |
||
| 619 | Option p = new ActionOption (prototype, description, 1, |
||
| 620 | delegate (OptionValueCollection v) { action (v [0]); }); |
||
| 621 | base.Add (p); |
||
| 622 | return this; |
||
| 623 | } |
||
| 624 | |||
| 625 | public OptionSet Add (string prototype, OptionAction<string, string> action) |
||
| 626 | { |
||
| 627 | return Add (prototype, null, action); |
||
| 628 | } |
||
| 629 | |||
| 630 | public OptionSet Add (string prototype, string description, OptionAction<string, string> action) |
||
| 631 | { |
||
| 632 | if (action == null) |
||
| 633 | throw new ArgumentNullException ("action"); |
||
| 634 | Option p = new ActionOption (prototype, description, 2, |
||
| 635 | delegate (OptionValueCollection v) {action (v [0], v [1]);}); |
||
| 636 | base.Add (p); |
||
| 637 | return this; |
||
| 638 | } |
||
| 639 | |||
| 640 | sealed class ActionOption<T> : Option { |
||
| 641 | Action<T> action; |
||
| 642 | |||
| 643 | public ActionOption (string prototype, string description, Action<T> action) |
||
| 644 | : base (prototype, description, 1) |
||
| 645 | { |
||
| 646 | if (action == null) |
||
| 647 | throw new ArgumentNullException ("action"); |
||
| 648 | this.action = action; |
||
| 649 | } |
||
| 650 | |||
| 651 | protected override void OnParseComplete (OptionContext c) |
||
| 652 | { |
||
| 653 | action (Parse<T> (c.OptionValues [0], c)); |
||
| 654 | } |
||
| 655 | } |
||
| 656 | |||
| 657 | sealed class ActionOption<TKey, TValue> : Option { |
||
| 658 | OptionAction<TKey, TValue> action; |
||
| 659 | |||
| 660 | public ActionOption (string prototype, string description, OptionAction<TKey, TValue> action) |
||
| 661 | : base (prototype, description, 2) |
||
| 662 | { |
||
| 663 | if (action == null) |
||
| 664 | throw new ArgumentNullException ("action"); |
||
| 665 | this.action = action; |
||
| 666 | } |
||
| 667 | |||
| 668 | protected override void OnParseComplete (OptionContext c) |
||
| 669 | { |
||
| 670 | action ( |
||
| 671 | Parse<TKey> (c.OptionValues [0], c), |
||
| 672 | Parse<TValue> (c.OptionValues [1], c)); |
||
| 673 | } |
||
| 674 | } |
||
| 675 | |||
| 676 | public OptionSet Add<T> (string prototype, Action<T> action) |
||
| 677 | { |
||
| 678 | return Add (prototype, null, action); |
||
| 679 | } |
||
| 680 | |||
| 681 | public OptionSet Add<T> (string prototype, string description, Action<T> action) |
||
| 682 | { |
||
| 683 | return Add (new ActionOption<T> (prototype, description, action)); |
||
| 684 | } |
||
| 685 | |||
| 686 | public OptionSet Add<TKey, TValue> (string prototype, OptionAction<TKey, TValue> action) |
||
| 687 | { |
||
| 688 | return Add (prototype, null, action); |
||
| 689 | } |
||
| 690 | |||
| 691 | public OptionSet Add<TKey, TValue> (string prototype, string description, OptionAction<TKey, TValue> action) |
||
| 692 | { |
||
| 693 | return Add (new ActionOption<TKey, TValue> (prototype, description, action)); |
||
| 694 | } |
||
| 695 | |||
| 696 | protected virtual OptionContext CreateOptionContext () |
||
| 697 | { |
||
| 698 | return new OptionContext (this); |
||
| 699 | } |
||
| 700 | |||
| 701 | #if LINQ |
||
| 702 | public List<string> Parse (IEnumerable<string> arguments) |
||
| 703 | { |
||
| 704 | bool process = true; |
||
| 705 | OptionContext c = CreateOptionContext (); |
||
| 706 | c.OptionIndex = -1; |
||
| 707 | var def = GetOptionForName ("<>"); |
||
| 708 | var unprocessed = |
||
| 709 | from argument in arguments |
||
| 710 | where ++c.OptionIndex >= 0 && (process || def != null) |
||
| 711 | ? process |
||
| 712 | ? argument == "--" |
||
| 713 | ? (process = false) |
||
| 714 | : !Parse (argument, c) |
||
| 715 | ? def != null |
||
| 716 | ? Unprocessed (null, def, c, argument) |
||
| 717 | : true |
||
| 718 | : false |
||
| 719 | : def != null |
||
| 720 | ? Unprocessed (null, def, c, argument) |
||
| 721 | : true |
||
| 722 | : true |
||
| 723 | select argument; |
||
| 724 | List<string> r = unprocessed.ToList (); |
||
| 725 | if (c.Option != null) |
||
| 726 | c.Option.Invoke (c); |
||
| 727 | return r; |
||
| 728 | } |
||
| 729 | #else |
||
| 730 | public List<string> Parse (IEnumerable<string> arguments) |
||
| 731 | { |
||
| 732 | OptionContext c = CreateOptionContext (); |
||
| 733 | c.OptionIndex = -1; |
||
| 734 | bool process = true; |
||
| 735 | List<string> unprocessed = new List<string> (); |
||
| 736 | Option def = Contains ("<>") ? this ["<>"] : null; |
||
| 737 | foreach (string argument in arguments) { |
||
| 738 | ++c.OptionIndex; |
||
| 739 | if (argument == "--") { |
||
| 740 | process = false; |
||
| 741 | continue; |
||
| 742 | } |
||
| 743 | if (!process) { |
||
| 744 | Unprocessed (unprocessed, def, c, argument); |
||
| 745 | continue; |
||
| 746 | } |
||
| 747 | if (!Parse (argument, c)) |
||
| 748 | Unprocessed (unprocessed, def, c, argument); |
||
| 749 | } |
||
| 750 | if (c.Option != null) |
||
| 751 | c.Option.Invoke (c); |
||
| 752 | return unprocessed; |
||
| 753 | } |
||
| 754 | #endif |
||
| 755 | |||
| 756 | private static bool Unprocessed (ICollection<string> extra, Option def, OptionContext c, string argument) |
||
| 757 | { |
||
| 758 | if (def == null) { |
||
| 759 | extra.Add (argument); |
||
| 760 | return false; |
||
| 761 | } |
||
| 762 | c.OptionValues.Add (argument); |
||
| 763 | c.Option = def; |
||
| 764 | c.Option.Invoke (c); |
||
| 765 | return false; |
||
| 766 | } |
||
| 767 | |||
| 768 | private readonly Regex ValueOption = new Regex ( |
||
| 769 | @"^(?<flag>--|-|/)(?<name>[^:=]+)((?<sep>[:=])(?<value>.*))?$"); |
||
| 770 | |||
| 771 | protected bool GetOptionParts (string argument, out string flag, out string name, out string sep, out string value) |
||
| 772 | { |
||
| 773 | if (argument == null) |
||
| 774 | throw new ArgumentNullException ("argument"); |
||
| 775 | |||
| 776 | flag = name = sep = value = null; |
||
| 777 | Match m = ValueOption.Match (argument); |
||
| 778 | if (!m.Success) { |
||
| 779 | return false; |
||
| 780 | } |
||
| 781 | flag = m.Groups ["flag"].Value; |
||
| 782 | name = m.Groups ["name"].Value; |
||
| 783 | if (m.Groups ["sep"].Success && m.Groups ["value"].Success) { |
||
| 784 | sep = m.Groups ["sep"].Value; |
||
| 785 | value = m.Groups ["value"].Value; |
||
| 786 | } |
||
| 787 | return true; |
||
| 788 | } |
||
| 789 | |||
| 790 | protected virtual bool Parse (string argument, OptionContext c) |
||
| 791 | { |
||
| 792 | if (c.Option != null) { |
||
| 793 | ParseValue (argument, c); |
||
| 794 | return true; |
||
| 795 | } |
||
| 796 | |||
| 797 | string f, n, s, v; |
||
| 798 | if (!GetOptionParts (argument, out f, out n, out s, out v)) |
||
| 799 | return false; |
||
| 800 | |||
| 801 | Option p; |
||
| 802 | if (Contains (n)) { |
||
| 803 | p = this [n]; |
||
| 804 | c.OptionName = f + n; |
||
| 805 | c.Option = p; |
||
| 806 | switch (p.OptionValueType) { |
||
| 807 | case OptionValueType.None: |
||
| 808 | c.OptionValues.Add (n); |
||
| 809 | c.Option.Invoke (c); |
||
| 810 | break; |
||
| 811 | case OptionValueType.Optional: |
||
| 812 | case OptionValueType.Required: |
||
| 813 | ParseValue (v, c); |
||
| 814 | break; |
||
| 815 | } |
||
| 816 | return true; |
||
| 817 | } |
||
| 818 | // no match; is it a bool option? |
||
| 819 | if (ParseBool (argument, n, c)) |
||
| 820 | return true; |
||
| 821 | // is it a bundled option? |
||
| 822 | if (ParseBundledValue (f, string.Concat (n + s + v), c)) |
||
| 823 | return true; |
||
| 824 | |||
| 825 | return false; |
||
| 826 | } |
||
| 827 | |||
| 828 | private void ParseValue (string option, OptionContext c) |
||
| 829 | { |
||
| 830 | if (option != null) |
||
| 831 | foreach (string o in c.Option.ValueSeparators != null |
||
| 832 | ? option.Split (c.Option.ValueSeparators, StringSplitOptions.None) |
||
| 833 | : new string[]{option}) { |
||
| 834 | c.OptionValues.Add (o); |
||
| 835 | } |
||
| 836 | if (c.OptionValues.Count == c.Option.MaxValueCount || |
||
| 837 | c.Option.OptionValueType == OptionValueType.Optional) |
||
| 838 | c.Option.Invoke (c); |
||
| 839 | else if (c.OptionValues.Count > c.Option.MaxValueCount) { |
||
| 840 | throw new OptionException (localizer (string.Format ( |
||
| 841 | "Error: Found {0} option values when expecting {1}.", |
||
| 842 | c.OptionValues.Count, c.Option.MaxValueCount)), |
||
| 843 | c.OptionName); |
||
| 844 | } |
||
| 845 | } |
||
| 846 | |||
| 847 | private bool ParseBool (string option, string n, OptionContext c) |
||
| 848 | { |
||
| 849 | Option p; |
||
| 850 | string rn; |
||
| 851 | if (n.Length >= 1 && (n [n.Length-1] == '+' || n [n.Length-1] == '-') && |
||
| 852 | Contains ((rn = n.Substring (0, n.Length-1)))) { |
||
| 853 | p = this [rn]; |
||
| 854 | string v = n [n.Length-1] == '+' ? option : null; |
||
| 855 | c.OptionName = option; |
||
| 856 | c.Option = p; |
||
| 857 | c.OptionValues.Add (v); |
||
| 858 | p.Invoke (c); |
||
| 859 | return true; |
||
| 860 | } |
||
| 861 | return false; |
||
| 862 | } |
||
| 863 | |||
| 864 | private bool ParseBundledValue (string f, string n, OptionContext c) |
||
| 865 | { |
||
| 866 | if (f != "-") |
||
| 867 | return false; |
||
| 868 | for (int i = 0; i < n.Length; ++i) { |
||
| 869 | Option p; |
||
| 870 | string opt = f + n [i].ToString (); |
||
| 871 | string rn = n [i].ToString (); |
||
| 872 | if (!Contains (rn)) { |
||
| 873 | if (i == 0) |
||
| 874 | return false; |
||
| 875 | throw new OptionException (string.Format (localizer ( |
||
| 876 | "Cannot bundle unregistered option '{0}'."), opt), opt); |
||
| 877 | } |
||
| 878 | p = this [rn]; |
||
| 879 | switch (p.OptionValueType) { |
||
| 880 | case OptionValueType.None: |
||
| 881 | Invoke (c, opt, n, p); |
||
| 882 | break; |
||
| 883 | case OptionValueType.Optional: |
||
| 884 | case OptionValueType.Required: { |
||
| 885 | string v = n.Substring (i+1); |
||
| 886 | c.Option = p; |
||
| 887 | c.OptionName = opt; |
||
| 888 | ParseValue (v.Length != 0 ? v : null, c); |
||
| 889 | return true; |
||
| 890 | } |
||
| 891 | default: |
||
| 892 | throw new InvalidOperationException ("Unknown OptionValueType: " + p.OptionValueType); |
||
| 893 | } |
||
| 894 | } |
||
| 895 | return true; |
||
| 896 | } |
||
| 897 | |||
| 898 | private static void Invoke (OptionContext c, string name, string value, Option option) |
||
| 899 | { |
||
| 900 | c.OptionName = name; |
||
| 901 | c.Option = option; |
||
| 902 | c.OptionValues.Add (value); |
||
| 903 | option.Invoke (c); |
||
| 904 | } |
||
| 905 | |||
| 906 | private const int OptionWidth = 29; |
||
| 907 | |||
| 908 | public void WriteOptionDescriptions (TextWriter o) |
||
| 909 | { |
||
| 910 | foreach (Option p in this) { |
||
| 911 | int written = 0; |
||
| 912 | if (!WriteOptionPrototype (o, p, ref written)) |
||
| 913 | continue; |
||
| 914 | |||
| 915 | if (written < OptionWidth) |
||
| 916 | o.Write (new string (' ', OptionWidth - written)); |
||
| 917 | else { |
||
| 918 | o.WriteLine (); |
||
| 919 | o.Write (new string (' ', OptionWidth)); |
||
| 920 | } |
||
| 921 | |||
| 922 | bool indent = false; |
||
| 923 | string prefix = new string (' ', OptionWidth+2); |
||
| 924 | foreach (string line in GetLines (localizer (GetDescription (p.Description)))) { |
||
| 925 | if (indent) |
||
| 926 | o.Write (prefix); |
||
| 927 | o.WriteLine (line); |
||
| 928 | indent = true; |
||
| 929 | } |
||
| 930 | } |
||
| 931 | } |
||
| 932 | |||
| 933 | bool WriteOptionPrototype (TextWriter o, Option p, ref int written) |
||
| 934 | { |
||
| 935 | string[] names = p.Names; |
||
| 936 | |||
| 937 | int i = GetNextOptionIndex (names, 0); |
||
| 938 | if (i == names.Length) |
||
| 939 | return false; |
||
| 940 | |||
| 941 | if (names [i].Length == 1) { |
||
| 942 | Write (o, ref written, " -"); |
||
| 943 | Write (o, ref written, names [0]); |
||
| 944 | } |
||
| 945 | else { |
||
| 946 | Write (o, ref written, " --"); |
||
| 947 | Write (o, ref written, names [0]); |
||
| 948 | } |
||
| 949 | |||
| 950 | for ( i = GetNextOptionIndex (names, i+1); |
||
| 951 | i < names.Length; i = GetNextOptionIndex (names, i+1)) { |
||
| 952 | Write (o, ref written, ", "); |
||
| 953 | Write (o, ref written, names [i].Length == 1 ? "-" : "--"); |
||
| 954 | Write (o, ref written, names [i]); |
||
| 955 | } |
||
| 956 | |||
| 957 | if (p.OptionValueType == OptionValueType.Optional || |
||
| 958 | p.OptionValueType == OptionValueType.Required) { |
||
| 959 | if (p.OptionValueType == OptionValueType.Optional) { |
||
| 960 | Write (o, ref written, localizer ("[")); |
||
| 961 | } |
||
| 962 | Write (o, ref written, localizer ("=" + GetArgumentName (0, p.MaxValueCount, p.Description))); |
||
| 963 | string sep = p.ValueSeparators != null && p.ValueSeparators.Length > 0 |
||
| 964 | ? p.ValueSeparators [0] |
||
| 965 | : " "; |
||
| 966 | for (int c = 1; c < p.MaxValueCount; ++c) { |
||
| 967 | Write (o, ref written, localizer (sep + GetArgumentName (c, p.MaxValueCount, p.Description))); |
||
| 968 | } |
||
| 969 | if (p.OptionValueType == OptionValueType.Optional) { |
||
| 970 | Write (o, ref written, localizer ("]")); |
||
| 971 | } |
||
| 972 | } |
||
| 973 | return true; |
||
| 974 | } |
||
| 975 | |||
| 976 | static int GetNextOptionIndex (string[] names, int i) |
||
| 977 | { |
||
| 978 | while (i < names.Length && names [i] == "<>") { |
||
| 979 | ++i; |
||
| 980 | } |
||
| 981 | return i; |
||
| 982 | } |
||
| 983 | |||
| 984 | static void Write (TextWriter o, ref int n, string s) |
||
| 985 | { |
||
| 986 | n += s.Length; |
||
| 987 | o.Write (s); |
||
| 988 | } |
||
| 989 | |||
| 990 | private static string GetArgumentName (int index, int maxIndex, string description) |
||
| 991 | { |
||
| 992 | if (description == null) |
||
| 993 | return maxIndex == 1 ? "VALUE" : "VALUE" + (index + 1); |
||
| 994 | string[] nameStart; |
||
| 995 | if (maxIndex == 1) |
||
| 996 | nameStart = new string[]{"{0:", "{"}; |
||
| 997 | else |
||
| 998 | nameStart = new string[]{"{" + index + ":"}; |
||
| 999 | for (int i = 0; i < nameStart.Length; ++i) { |
||
| 1000 | int start, j = 0; |
||
| 1001 | do { |
||
| 1002 | start = description.IndexOf (nameStart [i], j); |
||
| 1003 | } while (start >= 0 && j != 0 ? description [j++ - 1] == '{' : false); |
||
| 1004 | if (start == -1) |
||
| 1005 | continue; |
||
| 1006 | int end = description.IndexOf ("}", start); |
||
| 1007 | if (end == -1) |
||
| 1008 | continue; |
||
| 1009 | return description.Substring (start + nameStart [i].Length, end - start - nameStart [i].Length); |
||
| 1010 | } |
||
| 1011 | return maxIndex == 1 ? "VALUE" : "VALUE" + (index + 1); |
||
| 1012 | } |
||
| 1013 | |||
| 1014 | private static string GetDescription (string description) |
||
| 1015 | { |
||
| 1016 | if (description == null) |
||
| 1017 | return string.Empty; |
||
| 1018 | StringBuilder sb = new StringBuilder (description.Length); |
||
| 1019 | int start = -1; |
||
| 1020 | for (int i = 0; i < description.Length; ++i) { |
||
| 1021 | switch (description [i]) { |
||
| 1022 | case '{': |
||
| 1023 | if (i == start) { |
||
| 1024 | sb.Append ('{'); |
||
| 1025 | start = -1; |
||
| 1026 | } |
||
| 1027 | else if (start < 0) |
||
| 1028 | start = i + 1; |
||
| 1029 | break; |
||
| 1030 | case '}': |
||
| 1031 | if (start < 0) { |
||
| 1032 | if ((i+1) == description.Length || description [i+1] != '}') |
||
| 1033 | throw new InvalidOperationException ("Invalid option description: " + description); |
||
| 1034 | ++i; |
||
| 1035 | sb.Append ("}"); |
||
| 1036 | } |
||
| 1037 | else { |
||
| 1038 | sb.Append (description.Substring (start, i - start)); |
||
| 1039 | start = -1; |
||
| 1040 | } |
||
| 1041 | break; |
||
| 1042 | case ':': |
||
| 1043 | if (start < 0) |
||
| 1044 | goto default; |
||
| 1045 | start = i + 1; |
||
| 1046 | break; |
||
| 1047 | default: |
||
| 1048 | if (start < 0) |
||
| 1049 | sb.Append (description [i]); |
||
| 1050 | break; |
||
| 1051 | } |
||
| 1052 | } |
||
| 1053 | return sb.ToString (); |
||
| 1054 | } |
||
| 1055 | |||
| 1056 | private static IEnumerable<string> GetLines (string description) |
||
| 1057 | { |
||
| 1058 | if (string.IsNullOrEmpty (description)) { |
||
| 1059 | yield return string.Empty; |
||
| 1060 | yield break; |
||
| 1061 | } |
||
| 1062 | int length = 80 - OptionWidth - 1; |
||
| 1063 | int start = 0, end; |
||
| 1064 | do { |
||
| 1065 | end = GetLineEnd (start, length, description); |
||
| 1066 | char c = description [end-1]; |
||
| 1067 | if (char.IsWhiteSpace (c)) |
||
| 1068 | --end; |
||
| 1069 | bool writeContinuation = end != description.Length && !IsEolChar (c); |
||
| 1070 | string line = description.Substring (start, end - start) + |
||
| 1071 | (writeContinuation ? "-" : ""); |
||
| 1072 | yield return line; |
||
| 1073 | start = end; |
||
| 1074 | if (char.IsWhiteSpace (c)) |
||
| 1075 | ++start; |
||
| 1076 | length = 80 - OptionWidth - 2 - 1; |
||
| 1077 | } while (end < description.Length); |
||
| 1078 | } |
||
| 1079 | |||
| 1080 | private static bool IsEolChar (char c) |
||
| 1081 | { |
||
| 1082 | return !char.IsLetterOrDigit (c); |
||
| 1083 | } |
||
| 1084 | |||
| 1085 | private static int GetLineEnd (int start, int length, string description) |
||
| 1086 | { |
||
| 1087 | int end = System.Math.Min (start + length, description.Length); |
||
| 1088 | int sep = -1; |
||
| 1089 | for (int i = start; i < end; ++i) { |
||
| 1090 | if (description [i] == '\n') |
||
| 1091 | return i+1; |
||
| 1092 | if (IsEolChar (description [i])) |
||
| 1093 | sep = i+1; |
||
| 1094 | } |
||
| 1095 | if (sep == -1 || end == description.Length) |
||
| 1096 | return end; |
||
| 1097 | return sep; |
||
| 1098 | } |
||
| 1099 | } |
||
| 1100 | } |
||
| 1101 |