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.PdfSharpCore.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.Text;
+
+namespace PdfSharpCore.Pdf.Internal
+{
+    /// <summary>
+    /// An encoder for raw strings. The raw encoding is simply the identity relation between
+    /// characters and bytes. PDFsharp internally works with raw encoded strings instead of
+    /// byte arrays because strings are much more handy than byte arrays.
+    /// </summary>
+    /// <remarks>
+    /// Raw encoded strings represent an array of bytes. Therefore a character greater than
+    /// 255 is not valid in a raw encoded string.
+    /// </remarks>
+    public sealed class RawEncoding : Encoding
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="RawEncoding"/> class.
+        /// </summary>
+        // ReSharper disable EmptyConstructor
+        public RawEncoding()
+        { }
+        // ReSharper restore EmptyConstructor
+
+        /// <summary>
+        /// When overridden in a derived class, calculates the number of bytes produced by encoding a set of characters from the specified character array.
+        /// </summary>
+        /// <param name="chars">The character array containing the set of characters to encode.</param>
+        /// <param name="index">The index of the first character to encode.</param>
+        /// <param name="count">The number of characters to encode.</param>
+        /// <returns>
+        /// The number of bytes produced by encoding the specified characters.
+        /// </returns>
+        public override int GetByteCount(char[] chars, int index, int count)
+        {
+            return count;
+        }
+
+        /// <summary>
+        /// When overridden in a derived class, encodes a set of characters from the specified character array into the specified byte array.
+        /// </summary>
+        /// <param name="chars">The character array containing the set of characters to encode.</param>
+        /// <param name="charIndex">The index of the first character to encode.</param>
+        /// <param name="charCount">The number of characters to encode.</param>
+        /// <param name="bytes">The byte array to contain the resulting sequence of bytes.</param>
+        /// <param name="byteIndex">The index at which to start writing the resulting sequence of bytes.</param>
+        /// <returns>
+        /// The actual number of bytes written into <paramref name="bytes"/>.
+        /// </returns>
+        public override int GetBytes(char[] chars, int charIndex, int charCount, byte[] bytes, int byteIndex)
+        {
+            for (int count = charCount; count > 0; charIndex++, byteIndex++, count--)
+            {
+#if DEBUG_
+                if ((uint) chars[charIndex] > 255)
+                    Debug-Break.Break(true);
+#endif
+                //Debug.Assert((uint)chars[charIndex] < 256, "Raw string contains invalid character with a value > 255.");
+                bytes[byteIndex] = (byte)chars[charIndex];
+                //#warning Here is a HACK that must not be ignored!
+                // HACK: 
+                // bytes[byteIndex] = (byte)chars[charIndex];
+            }
+            return charCount;
+        }
+
+        /// <summary>
+        /// When overridden in a derived class, calculates the number of characters produced by decoding a sequence of bytes from the specified byte array.
+        /// </summary>
+        /// <param name="bytes">The byte array containing the sequence of bytes to decode.</param>
+        /// <param name="index">The index of the first byte to decode.</param>
+        /// <param name="count">The number of bytes to decode.</param>
+        /// <returns>
+        /// The number of characters produced by decoding the specified sequence of bytes.
+        /// </returns>
+        public override int GetCharCount(byte[] bytes, int index, int count)
+        {
+            return count;
+        }
+
+        /// <summary>
+        /// When overridden in a derived class, decodes a sequence of bytes from the specified byte array into the specified character array.
+        /// </summary>
+        /// <param name="bytes">The byte array containing the sequence of bytes to decode.</param>
+        /// <param name="byteIndex">The index of the first byte to decode.</param>
+        /// <param name="byteCount">The number of bytes to decode.</param>
+        /// <param name="chars">The character array to contain the resulting set of characters.</param>
+        /// <param name="charIndex">The index at which to start writing the resulting set of characters.</param>
+        /// <returns>
+        /// The actual number of characters written into <paramref name="chars"/>.
+        /// </returns>
+        public override int GetChars(byte[] bytes, int byteIndex, int byteCount, char[] chars, int charIndex)
+        {
+            for (int count = byteCount; count > 0; byteIndex++, charIndex++, count--)
+                chars[charIndex] = (char)bytes[byteIndex];
+            return byteCount;
+        }
+
+        /// <summary>
+        /// When overridden in a derived class, calculates the maximum number of bytes produced by encoding the specified number of characters.
+        /// </summary>
+        /// <param name="charCount">The number of characters to encode.</param>
+        /// <returns>
+        /// The maximum number of bytes produced by encoding the specified number of characters.
+        /// </returns>
+        public override int GetMaxByteCount(int charCount)
+        {
+            return charCount;
+        }
+
+        /// <summary>
+        /// When overridden in a derived class, calculates the maximum number of characters produced by decoding the specified number of bytes.
+        /// </summary>
+        /// <param name="byteCount">The number of bytes to decode.</param>
+        /// <returns>
+        /// The maximum number of characters produced by decoding the specified number of bytes.
+        /// </returns>
+        public override int GetMaxCharCount(int byteCount)
+        {
+            return byteCount;
+        }
+    }
+}