OniSplit/Xml/XmlReaderExtensions.cs

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;

namespace Oni.Xml
{
    internal static class XmlReaderExtensions
    {
        private static readonly char[] emptyChars = new char[0];

        [ThreadStatic]
        private static char[] charBuffer;

        private static char[] CharBuffer
        {
            get
            {
                if (charBuffer == null)
                    charBuffer = new char[16384];

                return charBuffer;
            }
        }

        public static IEnumerable<string> ReadElementContentAsList(this XmlReader xml)
        {
            if (xml.SkipEmpty())
                yield break;

            xml.ReadStartElement();

            if (xml.NodeType == XmlNodeType.EndElement)
            {
                xml.ReadEndElement();
                yield break;
            }

#if DNET
            char[] buffer = CharBuffer;
            int offset = 0;
            int length;

            while ((length = xml.ReadValueChunk(buffer, offset, buffer.Length - offset)) > 0 || offset > 0)
            {
                bool hasMore = length != 0;
                length += offset;
                offset = 0;

                for (int i = 0; i < length; i++)
                {
                    if (Char.IsWhiteSpace(buffer[i]))
                        continue;

                    int start = i;

                    do
                        i++;
                    while (i < length && !Char.IsWhiteSpace(buffer[i]));

                    if (i == length && hasMore)
                    {
                        offset = i - start;
                        Array.Copy(buffer, start, buffer, 0, offset);
                        break;
                    }

                    yield return new string(buffer, start, i - start);
                }
            }

            while (xml.NodeType != XmlNodeType.EndElement)
                xml.Read();
#else
            string buffer = xml.ReadContentAsString();

            for (int i = 0; i < buffer.Length; i++)
            {
                if (char.IsWhiteSpace(buffer[i]))
                    continue;

                int start = i;

                do
                    i++;
                while (i < buffer.Length && !char.IsWhiteSpace(buffer[i]));

                yield return buffer.Substring(start, i - start);
            }
#endif

            xml.ReadEndElement();
        }

        private static void ReadArrayCore<T>(XmlReader xml, Func<string, T> parser, List<T> list)
        {
            foreach (var text in xml.ReadElementContentAsList())
                list.Add(parser(text));
        }

        public static T[] ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> parser)
        {
            var list = new List<T>();
            ReadArrayCore<T>(xml, parser, list);
            return list.ToArray();
        }

        public static T[] ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> converter, int count)
        {
            var list = new List<T>(count);
            ReadArrayCore(xml, converter, list);
            var array = new T[count];
            list.CopyTo(0, array, 0, count);
            return array;
        }

        public static void ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> parser, T[] array)
        {
            var text = xml.ReadElementContentAsString();
            var tokens = text.Split(emptyChars, StringSplitOptions.RemoveEmptyEntries);

            for (int i = 0; i < array.Length; i++)
            {
                if (i < tokens.Length)
                    array[i] = parser(tokens[i]);
                else
                    array[i] = default(T);
            }
        }

        public static T[] ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> parser, string name)
        {
            string text;

            if (name == null)
                text = xml.ReadElementContentAsString();
            else
                text = xml.ReadElementContentAsString(name, string.Empty);

            var tokens = text.Split(emptyChars, StringSplitOptions.RemoveEmptyEntries);
            return tokens.ConvertAll(parser);
        }

        private static T[] ReadArray<T>(this XmlReader xml, Func<string, T> parser, int count)
        {
            var text = xml.ReadElementContentAsString();
            var tokens = text.Split(emptyChars, StringSplitOptions.RemoveEmptyEntries);
            var values = tokens.ConvertAll(parser);

            Array.Resize(ref values, count);

            return values;
        }

        public static T[] ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> converter, int count, string name)
        {
            var array = xml.ReadElementContentAsArray<T>(converter, name);
            Array.Resize(ref array, count);
            return array;
        }


        public static Vector2 ReadElementContentAsVector2(this XmlReader xml, string name = null)
        {
            var values = xml.ReadElementContentAsArray(XmlConvert.ToSingle, 2, name);

            return new Vector2(values[0], values[1]);
        }

        public static Vector3 ReadElementContentAsVector3(this XmlReader xml, string name = null)
        {
            var values = xml.ReadElementContentAsArray(XmlConvert.ToSingle, 3);

            return new Vector3(values[0], values[1], values[2]);
        }

        public static Vector4 ReadElementContentAsVector4(this XmlReader xml)
        {
            var values = xml.ReadElementContentAsArray(XmlConvert.ToSingle, 4);

            return new Vector4(values[0], values[1], values[2], values[3]);
        }

        public static Quaternion ReadElementContentAsEulerXYZ(this XmlReader xml)
        {
            var values = xml.ReadElementContentAsArray(XmlConvert.ToSingle, 3);

            return Quaternion.CreateFromEulerXYZ(values[0], values[1], values[2]);
        }

        public static Quaternion ReadElementContentAsQuaternion(this XmlReader xml, string name = null)
        {
            var quat = Quaternion.Identity;

            if (xml.IsEmptyElement)
            {
                xml.Skip();
            }
            else
            {
                if (name == null)
                    xml.ReadStartElement();
                else
                    xml.ReadStartElement(name);

                if (xml.NodeType == XmlNodeType.Text)
                {
                    var values = xml.ReadArray(XmlConvert.ToSingle, 4);

                    quat = new Quaternion(values[0], values[1], values[2], -values[3]);
                }
                else
                {
                    var transforms = new List<Quaternion>();

                    while (xml.IsStartElement())
                    {
                        switch (xml.LocalName)
                        {
                            case "rotate":
                                var rotate = xml.ReadElementContentAsVector4();
                                transforms.Add(Quaternion.CreateFromAxisAngle(rotate.XYZ, MathHelper.ToRadians(rotate.W)));
                                break;
                            case "euler":
                                transforms.Add(xml.ReadElementContentAsEulerXYZ());
                                break;
                            default:
                                throw new XmlException(string.Format("Unknown element {0}", xml.LocalName));
                        }
                    }

                    foreach (var transform in Utils.Reverse(transforms))
                        quat *= transform;
                }

                xml.ReadEndElement();
            }

            return quat;
        }

        public static Matrix ReadElementContentAsMatrix43(this XmlReader xml, string name = null)
        {
            var matrix = Matrix.Identity;

            if (xml.IsEmptyElement)
            {
                xml.Skip();
            }
            else
            {
                if (name == null)
                    xml.ReadStartElement();
                else
                    xml.ReadStartElement(name);

                if (xml.NodeType == XmlNodeType.Text)
                {
                    var values = xml.ReadArray(XmlConvert.ToSingle, 12);

                    matrix = new Matrix(
                        values[0], values[1], values[2], 0.0f,
                        values[3], values[4], values[5], 0.0f,
                        values[6], values[7], values[8], 0.0f,
                        values[9], values[10], values[11], 1.0f);
                }
                else
                {
                    var transforms = new List<Matrix>();

                    while (xml.IsStartElement())
                    {
                        switch (xml.LocalName)
                        {
                            case "translate":
                                transforms.Add(Matrix.CreateTranslation(xml.ReadElementContentAsVector3()));
                                break;
                            case "rotate":
                                var rotate = xml.ReadElementContentAsVector4();
                                transforms.Add(Matrix.CreateFromAxisAngle(rotate.XYZ, MathHelper.ToRadians(rotate.W)));
                                break;
                            case "euler":
                                transforms.Add(xml.ReadElementContentAsEulerXYZ().ToMatrix());
                                break;
                            case "scale":
                                transforms.Add(Matrix.CreateScale(xml.ReadElementContentAsVector3()));
                                break;
                            default:
                                throw new XmlException(string.Format("Unknown element {0}", xml.LocalName));
                        }
                    }

                    foreach (var transform in Utils.Reverse(transforms))
                        matrix *= transform;
                }

                xml.ReadEndElement();
            }

            return matrix;
        }
    }
}
Revision:	1114
Committed:	Wed Jan 22 14:08:57 2020 UTC (5 years, 9 months ago) by iritscen
File size:	10446 byte(s)
Log Message:	Adding OniSplit source code (v0.9.99.0). Many thanks to Neo for all his work over the years.
#	Content
1	using System;
2	using System.Collections.Generic;
3	using System.Text;
4	using System.Xml;
5
6	namespace Oni.Xml
7	{
8	internal static class XmlReaderExtensions
9	{
10	private static readonly char[] emptyChars = new char[0];
11
12	[ThreadStatic]
13	private static char[] charBuffer;
14
15	private static char[] CharBuffer
16	{
17	get
18	{
19	if (charBuffer == null)
20	charBuffer = new char[16384];
21
22	return charBuffer;
23	}
24	}
25
26	public static IEnumerable<string> ReadElementContentAsList(this XmlReader xml)
27	{
28	if (xml.SkipEmpty())
29	yield break;
30
31	xml.ReadStartElement();
32
33	if (xml.NodeType == XmlNodeType.EndElement)
34	{
35	xml.ReadEndElement();
36	yield break;
37	}
38
39	#if DNET
40	char[] buffer = CharBuffer;
41	int offset = 0;
42	int length;
43
44	while ((length = xml.ReadValueChunk(buffer, offset, buffer.Length - offset)) > 0 \|\| offset > 0)
45	{
46	bool hasMore = length != 0;
47	length += offset;
48	offset = 0;
49
50	for (int i = 0; i < length; i++)
51	{
52	if (Char.IsWhiteSpace(buffer[i]))
53	continue;
54
55	int start = i;
56
57	do
58	i++;
59	while (i < length && !Char.IsWhiteSpace(buffer[i]));
60
61	if (i == length && hasMore)
62	{
63	offset = i - start;
64	Array.Copy(buffer, start, buffer, 0, offset);
65	break;
66	}
67
68	yield return new string(buffer, start, i - start);
69	}
70	}
71
72	while (xml.NodeType != XmlNodeType.EndElement)
73	xml.Read();
74	#else
75	string buffer = xml.ReadContentAsString();
76
77	for (int i = 0; i < buffer.Length; i++)
78	{
79	if (char.IsWhiteSpace(buffer[i]))
80	continue;
81
82	int start = i;
83
84	do
85	i++;
86	while (i < buffer.Length && !char.IsWhiteSpace(buffer[i]));
87
88	yield return buffer.Substring(start, i - start);
89	}
90	#endif
91
92	xml.ReadEndElement();
93	}
94
95	private static void ReadArrayCore<T>(XmlReader xml, Func<string, T> parser, List<T> list)
96	{
97	foreach (var text in xml.ReadElementContentAsList())
98	list.Add(parser(text));
99	}
100
101	public static T[] ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> parser)
102	{
103	var list = new List<T>();
104	ReadArrayCore<T>(xml, parser, list);
105	return list.ToArray();
106	}
107
108	public static T[] ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> converter, int count)
109	{
110	var list = new List<T>(count);
111	ReadArrayCore(xml, converter, list);
112	var array = new T[count];
113	list.CopyTo(0, array, 0, count);
114	return array;
115	}
116
117	public static void ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> parser, T[] array)
118	{
119	var text = xml.ReadElementContentAsString();
120	var tokens = text.Split(emptyChars, StringSplitOptions.RemoveEmptyEntries);
121
122	for (int i = 0; i < array.Length; i++)
123	{
124	if (i < tokens.Length)
125	array[i] = parser(tokens[i]);
126	else
127	array[i] = default(T);
128	}
129	}
130
131	public static T[] ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> parser, string name)
132	{
133	string text;
134
135	if (name == null)
136	text = xml.ReadElementContentAsString();
137	else
138	text = xml.ReadElementContentAsString(name, string.Empty);
139
140	var tokens = text.Split(emptyChars, StringSplitOptions.RemoveEmptyEntries);
141	return tokens.ConvertAll(parser);
142	}
143
144	private static T[] ReadArray<T>(this XmlReader xml, Func<string, T> parser, int count)
145	{
146	var text = xml.ReadElementContentAsString();
147	var tokens = text.Split(emptyChars, StringSplitOptions.RemoveEmptyEntries);
148	var values = tokens.ConvertAll(parser);
149
150	Array.Resize(ref values, count);
151
152	return values;
153	}
154
155	public static T[] ReadElementContentAsArray<T>(this XmlReader xml, Func<string, T> converter, int count, string name)
156	{
157	var array = xml.ReadElementContentAsArray<T>(converter, name);
158	Array.Resize(ref array, count);
159	return array;
160	}
161
162
163	public static Vector2 ReadElementContentAsVector2(this XmlReader xml, string name = null)
164	{
165	var values = xml.ReadElementContentAsArray(XmlConvert.ToSingle, 2, name);
166
167	return new Vector2(values[0], values[1]);
168	}
169
170	public static Vector3 ReadElementContentAsVector3(this XmlReader xml, string name = null)
171	{
172	var values = xml.ReadElementContentAsArray(XmlConvert.ToSingle, 3);
173
174	return new Vector3(values[0], values[1], values[2]);
175	}
176
177	public static Vector4 ReadElementContentAsVector4(this XmlReader xml)
178	{
179	var values = xml.ReadElementContentAsArray(XmlConvert.ToSingle, 4);
180
181	return new Vector4(values[0], values[1], values[2], values[3]);
182	}
183
184	public static Quaternion ReadElementContentAsEulerXYZ(this XmlReader xml)
185	{
186	var values = xml.ReadElementContentAsArray(XmlConvert.ToSingle, 3);
187
188	return Quaternion.CreateFromEulerXYZ(values[0], values[1], values[2]);
189	}
190
191	public static Quaternion ReadElementContentAsQuaternion(this XmlReader xml, string name = null)
192	{
193	var quat = Quaternion.Identity;
194
195	if (xml.IsEmptyElement)
196	{
197	xml.Skip();
198	}
199	else
200	{
201	if (name == null)
202	xml.ReadStartElement();
203	else
204	xml.ReadStartElement(name);
205
206	if (xml.NodeType == XmlNodeType.Text)
207	{
208	var values = xml.ReadArray(XmlConvert.ToSingle, 4);
209
210	quat = new Quaternion(values[0], values[1], values[2], -values[3]);
211	}
212	else
213	{
214	var transforms = new List<Quaternion>();
215
216	while (xml.IsStartElement())
217	{
218	switch (xml.LocalName)
219	{
220	case "rotate":
221	var rotate = xml.ReadElementContentAsVector4();
222	transforms.Add(Quaternion.CreateFromAxisAngle(rotate.XYZ, MathHelper.ToRadians(rotate.W)));
223	break;
224	case "euler":
225	transforms.Add(xml.ReadElementContentAsEulerXYZ());
226	break;
227	default:
228	throw new XmlException(string.Format("Unknown element {0}", xml.LocalName));
229	}
230	}
231
232	foreach (var transform in Utils.Reverse(transforms))
233	quat *= transform;
234	}
235
236	xml.ReadEndElement();
237	}
238
239	return quat;
240	}
241
242	public static Matrix ReadElementContentAsMatrix43(this XmlReader xml, string name = null)
243	{
244	var matrix = Matrix.Identity;
245
246	if (xml.IsEmptyElement)
247	{
248	xml.Skip();
249	}
250	else
251	{
252	if (name == null)
253	xml.ReadStartElement();
254	else
255	xml.ReadStartElement(name);
256
257	if (xml.NodeType == XmlNodeType.Text)
258	{
259	var values = xml.ReadArray(XmlConvert.ToSingle, 12);
260
261	matrix = new Matrix(
262	values[0], values[1], values[2], 0.0f,
263	values[3], values[4], values[5], 0.0f,
264	values[6], values[7], values[8], 0.0f,
265	values[9], values[10], values[11], 1.0f);
266	}
267	else
268	{
269	var transforms = new List<Matrix>();
270
271	while (xml.IsStartElement())
272	{
273	switch (xml.LocalName)
274	{
275	case "translate":
276	transforms.Add(Matrix.CreateTranslation(xml.ReadElementContentAsVector3()));
277	break;
278	case "rotate":
279	var rotate = xml.ReadElementContentAsVector4();
280	transforms.Add(Matrix.CreateFromAxisAngle(rotate.XYZ, MathHelper.ToRadians(rotate.W)));
281	break;
282	case "euler":
283	transforms.Add(xml.ReadElementContentAsEulerXYZ().ToMatrix());
284	break;
285	case "scale":
286	transforms.Add(Matrix.CreateScale(xml.ReadElementContentAsVector3()));
287	break;
288	default:
289	throw new XmlException(string.Format("Unknown element {0}", xml.LocalName));
290	}
291	}
292
293	foreach (var transform in Utils.Reverse(transforms))
294	matrix *= transform;
295	}
296
297	xml.ReadEndElement();
298	}
299
300	return matrix;
301	}
302	}
303	}