vendor: import KillerPDF 1.7.5 source (GPL-3.0) as the base for MMD PDF

2026-08-27 06:58:22 +02:00
commit 532485a830
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+#region PDFsharp - A .NET library for processing PDF
+//
+// Authors:
+//   Stefan Lange
+//
+// Copyright (c) 2005-2016 empira Software GmbH, Cologne Area (Germany)
+//
+// http://www.PdfSharp.com
+// http://sourceforge.net/projects/pdfsharp
+//
+// 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.
+#endregion
+
+using System;
+using System.Diagnostics;
+using System.Globalization;
+using PdfSharpCore.Pdf.IO;
+
+namespace PdfSharpCore.Pdf
+{
+    /// <summary>
+    /// Represents a direct unsigned integer value.
+    /// </summary>
+    [DebuggerDisplay("({Value})")]
+    public sealed class PdfUInteger : PdfNumber, IConvertible
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PdfUInteger"/> class.
+        /// </summary>
+        public PdfUInteger()
+        { }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PdfUInteger"/> class.
+        /// </summary>
+        public PdfUInteger(uint value)
+        {
+            _value = value;
+        }
+
+        /// <summary>
+        /// Gets the value as integer.
+        /// </summary>
+        public uint Value
+        {
+            // This class must behave like a value type. Therefore it cannot be changed (like System.String).
+            get { return _value; }
+        }
+        readonly uint _value;
+
+        /// <summary>
+        /// Returns the unsigned integer as string.
+        /// </summary>
+        public override string ToString()
+        {
+            // ToString is impure but does not change the value of _value.
+            // ReSharper disable ImpureMethodCallOnReadonlyValueField
+            return _value.ToString(CultureInfo.InvariantCulture);
+            // ReSharper restore ImpureMethodCallOnReadonlyValueField
+        }
+
+        /// <summary>
+        /// Writes the integer as string.
+        /// </summary>
+        internal override void WriteObject(PdfWriter writer)
+        {
+            writer.Write(this);
+        }
+
+        #region IConvertible Members
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent 64-bit unsigned integer.
+        /// </summary>
+        public ulong ToUInt64(IFormatProvider provider)
+        {
+            return Convert.ToUInt64(_value);
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent 8-bit signed integer.
+        /// </summary>
+        public sbyte ToSByte(IFormatProvider provider)
+        {
+            throw new InvalidCastException();
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent double-precision floating-point number.
+        /// </summary>
+        public double ToDouble(IFormatProvider provider)
+        {
+            return _value;
+        }
+
+        /// <summary>
+        /// Returns an undefined DateTime structure.
+        /// </summary>
+        public DateTime ToDateTime(IFormatProvider provider)
+        {
+            // TODO:  Add PdfUInteger.ToDateTime implementation
+            return new DateTime();
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent single-precision floating-point number.
+        /// </summary>
+        public float ToSingle(IFormatProvider provider)
+        {
+            return _value;
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent Boolean value.
+        /// </summary>
+        public bool ToBoolean(IFormatProvider provider)
+        {
+            return Convert.ToBoolean(_value);
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent 32-bit signed integer.
+        /// </summary>
+        public int ToInt32(IFormatProvider provider)
+        {
+            return Convert.ToInt32(_value);
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent 16-bit unsigned integer.
+        /// </summary>
+        public ushort ToUInt16(IFormatProvider provider)
+        {
+            return Convert.ToUInt16(_value);
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent 16-bit signed integer.
+        /// </summary>
+        public short ToInt16(IFormatProvider provider)
+        {
+            return Convert.ToInt16(_value);
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent <see cref="T:System.String"></see>.
+        /// </summary>
+        string IConvertible.ToString(IFormatProvider provider)
+        {
+            return _value.ToString(provider);
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent 8-bit unsigned integer.
+        /// </summary>
+        public byte ToByte(IFormatProvider provider)
+        {
+            return Convert.ToByte(_value);
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent Unicode character.
+        /// </summary>
+        public char ToChar(IFormatProvider provider)
+        {
+            return Convert.ToChar(_value);
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent 64-bit signed integer.
+        /// </summary>
+        public long ToInt64(IFormatProvider provider)
+        {
+            return _value;
+        }
+
+        /// <summary>
+        /// Returns type code for 32-bit integers.
+        /// </summary>
+        public TypeCode GetTypeCode()
+        {
+            return TypeCode.Int32;
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent <see cref="T:System.Decimal"></see> number.
+        /// </summary>
+        public decimal ToDecimal(IFormatProvider provider)
+        {
+            return _value;
+        }
+
+        /// <summary>
+        /// Returns null.
+        /// </summary>
+        public object ToType(Type conversionType, IFormatProvider provider)
+        {
+            // TODO:  Add PdfUInteger.ToType implementation
+            return null;
+        }
+
+        /// <summary>
+        /// Converts the value of this instance to an equivalent 32-bit unsigned integer.
+        /// </summary>
+        public uint ToUInt32(IFormatProvider provider)
+        {
+            return Convert.ToUInt32(_value);
+        }
+
+        #endregion
+    }
+}