mirror of
https://github.com/Ryujinx/Opentk.git
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294 lines
9.7 KiB
C#
294 lines
9.7 KiB
C#
#region --- License ---
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/* Copyright (c) 2006, 2007 Stefanos Apostolopoulos
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* See license.txt for license info
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*/
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#endregion
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using System;
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using System.Diagnostics;
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using System.Globalization;
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using System.Linq;
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using System.Text;
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namespace Bind.Structures
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{
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/// <summary>
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/// Represents an opengl constant in C# format. Both the constant name and value
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/// can be retrieved or set. The value can be either a number, another constant
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/// or an alias to a constant
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/// </summary>
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public class Constant : IComparable<Constant>
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{
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static StringBuilder translator = new StringBuilder();
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static readonly int MaxReferenceDepth = 8;
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static int CurrentReferenceDepth = 0;
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#region PreviousName
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string original_name;
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// Gets the name prior to translation.
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public string OriginalName
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{
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get { return original_name; }
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private set { original_name = value; }
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}
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#endregion
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#region public string Name
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string _name;
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/// <summary>
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/// Gets or sets the name of the opengl constant (eg. GL_LINES).
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/// Undergoes processing unless the Settings.Legacy.NoAdvancedEnumProcessing flag is set.
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/// </summary>
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public string Name
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{
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get { return _name; }
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set
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{
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if (String.IsNullOrEmpty(value))
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throw new ArgumentNullException("value");
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if (OriginalName == null)
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OriginalName = _name;
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_name = value;
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}
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}
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#endregion
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#region public string Value
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string _value;
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/// <summary>
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/// Gets or sets the value of the opengl constant (eg. 0x00000001).
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/// </summary>
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public string Value
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{
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get
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{
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return _value;
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}
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set
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{
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if (String.IsNullOrEmpty(value))
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throw new ArgumentNullException("value");
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_value = value;
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}
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}
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#endregion
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#region public string Reference
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string _reference;
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/// <summary>
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/// Gets or sets a string indicating the OpenGL enum reference by this constant.
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/// Can be null.
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/// </summary>
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public string Reference
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{
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get { return _reference; }
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set
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{
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if (!String.IsNullOrEmpty(value))
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_reference = EnumProcessor.TranslateEnumName(value.Trim());
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else _reference = value;
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}
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}
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#endregion
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#region public bool Unchecked
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public bool Unchecked
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{
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get
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{
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// Check if the value is a number larger than Int32.MaxValue.
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ulong number;
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string test = Value;
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return UInt64.TryParse(test.ToLower().Replace("0x", String.Empty),
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NumberStyles.AllowHexSpecifier, null, out number) &&
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number > Int32.MaxValue;
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}
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}
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#endregion
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#region Constructors
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/// <summary>
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/// Creates an empty Constant.
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/// </summary>
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public Constant()
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{
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}
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/// <summary>
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/// Creates a Constant with the given name and value.
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/// </summary>
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/// <param name="name">The Name of the Constant.</param>
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/// <param name="value">The Type of the Constant.</param>
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public Constant(string name, string value)
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{
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Name = name;
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Value = value;
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}
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#endregion
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#region Translate
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[Obsolete]
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public static string Translate(string s, bool isValue)
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{
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translator.Remove(0, translator.Length);
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// Translate the constant's name to match .Net naming conventions
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bool name_is_all_caps = s.AsEnumerable().All(c => Char.IsLetter(c) ? Char.IsUpper(c) : true);
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bool name_contains_underscore = s.Contains("_");
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if ((Settings.Compatibility & Settings.Legacy.NoAdvancedEnumProcessing) == Settings.Legacy.None &&
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(name_is_all_caps || name_contains_underscore))
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{
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bool next_char_uppercase = true;
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bool is_after_digit = false;
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if (!isValue && Char.IsDigit(s[0]))
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translator.Insert(0, Settings.ConstantPrefix);
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foreach (char c in s)
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{
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if (c == '_')
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next_char_uppercase = true;
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else if (Char.IsDigit(c))
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{
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is_after_digit = true;
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translator.Append(c);
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}
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else
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{
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translator.Append(next_char_uppercase || (is_after_digit && c == 'd') ? Char.ToUpper(c) : Char.ToLower(c));
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is_after_digit = next_char_uppercase = false;
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}
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}
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translator[0] = Char.ToUpper(translator[0]);
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}
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else
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translator.Append(s);
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return translator.ToString();
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}
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#endregion
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/// <summary>
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/// Replces the Value of the given constant with the value referenced by the [c.Reference, c.Value] pair.
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/// </summary>
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/// <param name="c">The Constant to translate</param>
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/// <param name="enums">The list of enums to check.</param>
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/// <param name="auxEnums">The list of auxilliary enums to check.</param>
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/// <returns>True if the reference was found; false otherwise.</returns>
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public static bool TranslateConstantWithReference(Constant c, EnumCollection enums, EnumCollection auxEnums)
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{
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if (c == null)
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throw new ArgumentNullException("c");
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if (enums == null)
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throw new ArgumentNullException("enums");
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if (++CurrentReferenceDepth >= MaxReferenceDepth)
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throw new InvalidOperationException(String.Format(
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"Enum specification contains cycle: {0}",
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c.ToString()));
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if (!String.IsNullOrEmpty(c.Reference))
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{
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Constant referenced_constant;
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if (enums.ContainsKey(c.Reference) && enums[c.Reference].ConstantCollection.ContainsKey(c.Value))
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{
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// Transitively translate the referenced token
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// Todo: this may cause loops if two tokens reference each other.
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// Add a max reference depth and bail out?
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TranslateConstantWithReference(enums[c.Reference].ConstantCollection[c.Value], enums, auxEnums);
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referenced_constant = (enums[c.Reference].ConstantCollection[c.Value]);
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}
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else if (auxEnums != null && auxEnums.ContainsKey(c.Reference) && auxEnums[c.Reference].ConstantCollection.ContainsKey(c.Value))
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{
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// Legacy from previous generator incarnation.
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// Todo: merge everything into enums and get rid of auxEnums.
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TranslateConstantWithReference(auxEnums[c.Reference].ConstantCollection[c.Value], enums, auxEnums);
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referenced_constant = (auxEnums[c.Reference].ConstantCollection[c.Value]);
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}
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else if (enums.ContainsKey(Settings.CompleteEnumName) &&
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enums[Settings.CompleteEnumName].ConstantCollection.ContainsKey(c.Value))
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{
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// Try the All enum
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var reference = enums[Settings.CompleteEnumName].ConstantCollection[c.Value];
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if (reference.Reference == null)
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referenced_constant = (enums[Settings.CompleteEnumName].ConstantCollection[c.Value]);
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else
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{
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--CurrentReferenceDepth;
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return false;
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}
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}
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else
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{
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--CurrentReferenceDepth;
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return false;
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}
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//else throw new InvalidOperationException(String.Format("Unknown Enum \"{0}\" referenced by Constant \"{1}\"",
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// c.Reference, c.ToString()));
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c.Value = referenced_constant.Value;
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c.Reference = null;
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}
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--CurrentReferenceDepth;
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return true;
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}
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#region public override string ToString()
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/// <summary>
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/// Returns a string that represents the full constant declaration without decorations
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/// (eg GL_XXX_YYY = (int)0xDEADBEEF or GL_XXX_YYY = GL_ZZZ.FOOBAR).
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/// </summary>
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/// <returns></returns>
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[Obsolete("This belongs to the language-specific ISpecWriter implementations.")]
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public override string ToString()
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{
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if (String.IsNullOrEmpty(Name))
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return "";
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return String.Format("{0} = {1}((int){2}{3})",
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Name, Unchecked ? "unchecked" : "",
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!String.IsNullOrEmpty(Reference) ? Reference + Settings.NamespaceSeparator : "", Value);
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//return String.Format("{0} = {1}((int){2})", Name, Unchecked ? "unchecked" : "", Value);
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}
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#endregion
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#region IComparable <Constant>Members
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public int CompareTo(Constant other)
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{
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int ret = Value.CompareTo(other.Value);
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if (ret == 0)
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return Name.CompareTo(other.Name);
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return ret;
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}
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#endregion
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}
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}
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