688 lines
20 KiB
C#
688 lines
20 KiB
C#
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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namespace System.Xml
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{
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/// <summary>
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/// http://www.w3.org/TR/REC-xml
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/// </summary>
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/// <remarks>
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/// Includes code and Ideas from org.apache.xerces.util.XMLChar class of Xerces 2.0.1
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/// However, No surrogate support is included in this class.
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/// This class is currently public. Make it internal after testing completes
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/// </remarks>
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internal class XmlConstructs
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{
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internal static readonly char [] WhitespaceChars = {' ', '\n', '\t', '\r'};
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/** Character flags. */
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internal static readonly byte [] CHARS = new byte [1 << 16];
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/** Valid character mask. */
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internal const int VALID = 0x01;
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/** Space character mask. */
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internal const int SPACE = 0x02;
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/** Name start character mask. */
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internal const int NAME_START = 0x04;
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/** Name character mask. */
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internal const int NAME = 0x08;
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/** Pubid character mask. */
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internal const int PUBID = 0x10;
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/**
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* Content character mask. Special characters are those that can
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* be considered the start of markup, such as '<' and '&'.
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* The various newline characters are considered special as well.
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* All other valid XML characters can be considered content.
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* <p>
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* This is an optimization for the inner loop of character scanning.
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*/
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internal const int CONTENT = 0x20;
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/** NCName start character mask. */
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internal const int NCNAME_START = 0x40;
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/** NCName character mask. */
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internal const int NCNAME = 0x80;
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static XmlConstructs ()
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{
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//
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// [2] Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] |
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// [#xE000-#xFFFD] | [#x10000-#x10FFFF]
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//
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int[] charRange = {
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0x0009, 0x000A, 0x000D, 0x000D, 0x0020, 0xD7FF, 0xE000, 0xFFFD,
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};
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//
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// [3] S ::= (#x20 | #x9 | #xD | #xA)+
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//
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int[] spaceChar = {
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0x0020, 0x0009, 0x000D, 0x000A,
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};
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//
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// [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' |
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// CombiningChar | Extender
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//
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int[] nameChar = {
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0x002D, 0x002E, // '-' and '.'
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};
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//
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// [5] Name ::= (Letter | '_' | ':') (NameChar)*
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//
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int[] nameStartChar = {
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0x003A, 0x005F, // ':' and '_'
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};
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//
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// [13] PubidChar ::= #x20 | 0xD | 0xA | [a-zA-Z0-9] | [-'()+,./:=?;!*#@$_%]
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//
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int[] pubidChar = {
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0x000A, 0x000D, 0x0020, 0x0021, 0x0023, 0x0024, 0x0025, 0x003D,
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0x005F
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};
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int[] pubidRange = {
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0x0027, 0x003B, 0x003F, 0x005A, 0x0061, 0x007A
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};
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//
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// [84] Letter ::= BaseChar | Ideographic
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//
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int[] letterRange = {
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// BaseChar
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0x0041, 0x005A, 0x0061, 0x007A, 0x00C0, 0x00D6, 0x00D8, 0x00F6,
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0x00F8, 0x0131, 0x0134, 0x013E, 0x0141, 0x0148, 0x014A, 0x017E,
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0x0180, 0x01C3, 0x01CD, 0x01F0, 0x01F4, 0x01F5, 0x01FA, 0x0217,
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0x0250, 0x02A8, 0x02BB, 0x02C1, 0x0388, 0x038A, 0x038E, 0x03A1,
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0x03A3, 0x03CE, 0x03D0, 0x03D6, 0x03E2, 0x03F3, 0x0401, 0x040C,
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0x040E, 0x044F, 0x0451, 0x045C, 0x045E, 0x0481, 0x0490, 0x04C4,
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0x04C7, 0x04C8, 0x04CB, 0x04CC, 0x04D0, 0x04EB, 0x04EE, 0x04F5,
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0x04F8, 0x04F9, 0x0531, 0x0556, 0x0561, 0x0586, 0x05D0, 0x05EA,
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0x05F0, 0x05F2, 0x0621, 0x063A, 0x0641, 0x064A, 0x0671, 0x06B7,
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0x06BA, 0x06BE, 0x06C0, 0x06CE, 0x06D0, 0x06D3, 0x06E5, 0x06E6,
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0x0905, 0x0939, 0x0958, 0x0961, 0x0985, 0x098C, 0x098F, 0x0990,
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0x0993, 0x09A8, 0x09AA, 0x09B0, 0x09B6, 0x09B9, 0x09DC, 0x09DD,
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0x09DF, 0x09E1, 0x09F0, 0x09F1, 0x0A05, 0x0A0A, 0x0A0F, 0x0A10,
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0x0A13, 0x0A28, 0x0A2A, 0x0A30, 0x0A32, 0x0A33, 0x0A35, 0x0A36,
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0x0A38, 0x0A39, 0x0A59, 0x0A5C, 0x0A72, 0x0A74, 0x0A85, 0x0A8B,
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0x0A8F, 0x0A91, 0x0A93, 0x0AA8, 0x0AAA, 0x0AB0, 0x0AB2, 0x0AB3,
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0x0AB5, 0x0AB9, 0x0B05, 0x0B0C, 0x0B0F, 0x0B10, 0x0B13, 0x0B28,
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0x0B2A, 0x0B30, 0x0B32, 0x0B33, 0x0B36, 0x0B39, 0x0B5C, 0x0B5D,
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0x0B5F, 0x0B61, 0x0B85, 0x0B8A, 0x0B8E, 0x0B90, 0x0B92, 0x0B95,
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0x0B99, 0x0B9A, 0x0B9E, 0x0B9F, 0x0BA3, 0x0BA4, 0x0BA8, 0x0BAA,
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0x0BAE, 0x0BB5, 0x0BB7, 0x0BB9, 0x0C05, 0x0C0C, 0x0C0E, 0x0C10,
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0x0C12, 0x0C28, 0x0C2A, 0x0C33, 0x0C35, 0x0C39, 0x0C60, 0x0C61,
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0x0C85, 0x0C8C, 0x0C8E, 0x0C90, 0x0C92, 0x0CA8, 0x0CAA, 0x0CB3,
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0x0CB5, 0x0CB9, 0x0CE0, 0x0CE1, 0x0D05, 0x0D0C, 0x0D0E, 0x0D10,
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0x0D12, 0x0D28, 0x0D2A, 0x0D39, 0x0D60, 0x0D61, 0x0E01, 0x0E2E,
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0x0E32, 0x0E33, 0x0E40, 0x0E45, 0x0E81, 0x0E82, 0x0E87, 0x0E88,
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0x0E94, 0x0E97, 0x0E99, 0x0E9F, 0x0EA1, 0x0EA3, 0x0EAA, 0x0EAB,
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0x0EAD, 0x0EAE, 0x0EB2, 0x0EB3, 0x0EC0, 0x0EC4, 0x0F40, 0x0F47,
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0x0F49, 0x0F69, 0x10A0, 0x10C5, 0x10D0, 0x10F6, 0x1102, 0x1103,
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0x1105, 0x1107, 0x110B, 0x110C, 0x110E, 0x1112, 0x1154, 0x1155,
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0x115F, 0x1161, 0x116D, 0x116E, 0x1172, 0x1173, 0x11AE, 0x11AF,
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0x11B7, 0x11B8, 0x11BC, 0x11C2, 0x1E00, 0x1E9B, 0x1EA0, 0x1EF9,
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0x1F00, 0x1F15, 0x1F18, 0x1F1D, 0x1F20, 0x1F45, 0x1F48, 0x1F4D,
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0x1F50, 0x1F57, 0x1F5F, 0x1F7D, 0x1F80, 0x1FB4, 0x1FB6, 0x1FBC,
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0x1FC2, 0x1FC4, 0x1FC6, 0x1FCC, 0x1FD0, 0x1FD3, 0x1FD6, 0x1FDB,
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0x1FE0, 0x1FEC, 0x1FF2, 0x1FF4, 0x1FF6, 0x1FFC, 0x212A, 0x212B,
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0x2180, 0x2182, 0x3041, 0x3094, 0x30A1, 0x30FA, 0x3105, 0x312C,
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0xAC00, 0xD7A3,
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// Ideographic
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0x3021, 0x3029, 0x4E00, 0x9FA5,
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};
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int[] letterChar = {
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// BaseChar
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0x0386, 0x038C, 0x03DA, 0x03DC, 0x03DE, 0x03E0, 0x0559, 0x06D5,
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0x093D, 0x09B2, 0x0A5E, 0x0A8D, 0x0ABD, 0x0AE0, 0x0B3D, 0x0B9C,
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0x0CDE, 0x0E30, 0x0E84, 0x0E8A, 0x0E8D, 0x0EA5, 0x0EA7, 0x0EB0,
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0x0EBD, 0x1100, 0x1109, 0x113C, 0x113E, 0x1140, 0x114C, 0x114E,
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0x1150, 0x1159, 0x1163, 0x1165, 0x1167, 0x1169, 0x1175, 0x119E,
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0x11A8, 0x11AB, 0x11BA, 0x11EB, 0x11F0, 0x11F9, 0x1F59, 0x1F5B,
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0x1F5D, 0x1FBE, 0x2126, 0x212E,
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// Ideographic
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0x3007,
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};
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//
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// [87] CombiningChar ::= ...
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//
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int[] combiningCharRange = {
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0x0300, 0x0345, 0x0360, 0x0361, 0x0483, 0x0486, 0x0591, 0x05A1,
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0x05A3, 0x05B9, 0x05BB, 0x05BD, 0x05C1, 0x05C2, 0x064B, 0x0652,
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0x06D6, 0x06DC, 0x06DD, 0x06DF, 0x06E0, 0x06E4, 0x06E7, 0x06E8,
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0x06EA, 0x06ED, 0x0901, 0x0903, 0x093E, 0x094C, 0x0951, 0x0954,
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0x0962, 0x0963, 0x0981, 0x0983, 0x09C0, 0x09C4, 0x09C7, 0x09C8,
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0x09CB, 0x09CD, 0x09E2, 0x09E3, 0x0A40, 0x0A42, 0x0A47, 0x0A48,
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0x0A4B, 0x0A4D, 0x0A70, 0x0A71, 0x0A81, 0x0A83, 0x0ABE, 0x0AC5,
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0x0AC7, 0x0AC9, 0x0ACB, 0x0ACD, 0x0B01, 0x0B03, 0x0B3E, 0x0B43,
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0x0B47, 0x0B48, 0x0B4B, 0x0B4D, 0x0B56, 0x0B57, 0x0B82, 0x0B83,
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0x0BBE, 0x0BC2, 0x0BC6, 0x0BC8, 0x0BCA, 0x0BCD, 0x0C01, 0x0C03,
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0x0C3E, 0x0C44, 0x0C46, 0x0C48, 0x0C4A, 0x0C4D, 0x0C55, 0x0C56,
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0x0C82, 0x0C83, 0x0CBE, 0x0CC4, 0x0CC6, 0x0CC8, 0x0CCA, 0x0CCD,
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0x0CD5, 0x0CD6, 0x0D02, 0x0D03, 0x0D3E, 0x0D43, 0x0D46, 0x0D48,
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0x0D4A, 0x0D4D, 0x0E34, 0x0E3A, 0x0E47, 0x0E4E, 0x0EB4, 0x0EB9,
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0x0EBB, 0x0EBC, 0x0EC8, 0x0ECD, 0x0F18, 0x0F19, 0x0F71, 0x0F84,
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0x0F86, 0x0F8B, 0x0F90, 0x0F95, 0x0F99, 0x0FAD, 0x0FB1, 0x0FB7,
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0x20D0, 0x20DC, 0x302A, 0x302F,
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};
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int[] combiningCharChar = {
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0x05BF, 0x05C4, 0x0670, 0x093C, 0x094D, 0x09BC, 0x09BE, 0x09BF,
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0x09D7, 0x0A02, 0x0A3C, 0x0A3E, 0x0A3F, 0x0ABC, 0x0B3C, 0x0BD7,
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0x0D57, 0x0E31, 0x0EB1, 0x0F35, 0x0F37, 0x0F39, 0x0F3E, 0x0F3F,
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0x0F97, 0x0FB9, 0x20E1, 0x3099, 0x309A,
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};
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//
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// [88] Digit ::= ...
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//
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int[] digitRange = {
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0x0030, 0x0039, 0x0660, 0x0669, 0x06F0, 0x06F9, 0x0966, 0x096F,
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0x09E6, 0x09EF, 0x0A66, 0x0A6F, 0x0AE6, 0x0AEF, 0x0B66, 0x0B6F,
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0x0BE7, 0x0BEF, 0x0C66, 0x0C6F, 0x0CE6, 0x0CEF, 0x0D66, 0x0D6F,
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0x0E50, 0x0E59, 0x0ED0, 0x0ED9, 0x0F20, 0x0F29,
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};
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//
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// [89] Extender ::= ...
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//
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int[] extenderRange = {
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0x3031, 0x3035, 0x309D, 0x309E, 0x30FC, 0x30FE,
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};
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int[] extenderChar = {
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0x00B7, 0x02D0, 0x02D1, 0x0387, 0x0640, 0x0E46, 0x0EC6, 0x3005,
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};
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//
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// SpecialChar ::= '<', '&', '\n', '\r', ']'
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//
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int[] specialChar = {
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'<', '&', '\n', '\r', ']',
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};
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//
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// Initialize
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//
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// set valid characters
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for (int i = 0; i < charRange.Length; i += 2)
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{
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for (int j = charRange[i]; j <= charRange[i + 1]; j++)
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{
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CHARS[j] = (byte)(CHARS[j] | VALID | CONTENT);
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}
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}
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// remove special characters
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for (int i = 0; i < specialChar.Length; i++)
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{
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CHARS[specialChar[i]] = (byte)(CHARS[specialChar[i]] & ~CONTENT);
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}
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// set space characters
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for (int i = 0; i < spaceChar.Length; i++)
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{
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CHARS[spaceChar[i]] = (byte)(CHARS[spaceChar[i]] | SPACE);
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}
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// set name start characters
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for (int i = 0; i < nameStartChar.Length; i++)
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{
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CHARS[nameStartChar[i]] = (byte)(CHARS[nameStartChar[i]] | NAME_START | NAME |
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NCNAME_START | NCNAME);
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}
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for (int i = 0; i < letterRange.Length; i += 2)
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{
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for (int j = letterRange[i]; j <= letterRange[i + 1]; j++)
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{
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CHARS[j] = (byte)(CHARS[j] | NAME_START | NAME | NCNAME_START | NCNAME);
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}
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}
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for (int i = 0; i < letterChar.Length; i++)
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{
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CHARS[letterChar[i]] = (byte)(CHARS[letterChar[i]] | NAME_START | NAME |
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NCNAME_START | NCNAME);
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}
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// set name characters
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for (int i = 0; i < nameChar.Length; i++)
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{
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CHARS[nameChar[i]] = (byte)(CHARS[nameChar[i]] | NAME | NCNAME);
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}
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for (int i = 0; i < digitRange.Length; i += 2)
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{
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for (int j = digitRange[i]; j <= digitRange[i + 1]; j++)
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{
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CHARS[j] = (byte)(CHARS[j] | NAME | NCNAME);
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}
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}
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for (int i = 0; i < combiningCharRange.Length; i += 2)
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{
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for (int j = combiningCharRange[i]; j <= combiningCharRange[i + 1]; j++)
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{
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CHARS[j] = (byte)(CHARS[j] | NAME | NCNAME);
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}
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}
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for (int i = 0; i < combiningCharChar.Length; i++)
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{
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CHARS[combiningCharChar[i]] = (byte)(CHARS[combiningCharChar[i]] | NAME | NCNAME);
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}
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for (int i = 0; i < extenderRange.Length; i += 2)
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{
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for (int j = extenderRange[i]; j <= extenderRange[i + 1]; j++)
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{
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CHARS[j] = (byte)(CHARS[j] | NAME | NCNAME);
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}
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}
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for (int i = 0; i < extenderChar.Length; i++)
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{
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CHARS[extenderChar[i]] = (byte)(CHARS[extenderChar[i]] | NAME | NCNAME);
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}
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// remove ':' from allowable NCNAME_START and NCNAME chars
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CHARS[':'] = (byte)(CHARS[':'] & ~(NCNAME_START | NCNAME));
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// set Pubid characters
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for (int i = 0; i < pubidChar.Length; i++)
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{
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CHARS[pubidChar[i]] = (byte)(CHARS[pubidChar[i]] | PUBID);
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}
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for (int i = 0; i < pubidRange.Length; i += 2)
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{
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for (int j = pubidRange[i]; j <= pubidRange[i + 1]; j++)
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{
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CHARS[j] = (byte)(CHARS[j] | PUBID);
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}
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}
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}
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//Static Methods
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/// <summary>
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/// Returns true if the specified character is valid.
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/// </summary>
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/// <param name="c">The character to check.</param>
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public static bool IsValid(char c)
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{
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return c > 0 && ((CHARS[c] & VALID) != 0);
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}
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public static bool IsValid (int c)
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{
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if (c > 0xffff)
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return c < 0x110000;
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return c > 0 && ((CHARS[c] & VALID) != 0);
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}
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/// <summary>
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/// Returns true if the specified character is invalid.
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/// </summary>
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/// <param name="c">The character to check.</param>
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public static bool IsInvalid(char c)
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{
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return !IsValid(c);
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}
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public static bool IsInvalid(int c)
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{
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|
return !IsValid(c);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the specified character can be considered content.
|
|
/// </summary>
|
|
/// <param name="c">The character to check.</param>
|
|
public static bool IsContent(char c)
|
|
{
|
|
return (CHARS[c] & CONTENT) != 0;
|
|
}
|
|
|
|
public static bool IsContent(int c)
|
|
{
|
|
return c > 0 && c < CHARS.Length && (CHARS[c] & CONTENT) != 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the specified character can be considered markup.
|
|
/// Markup characters include '<', '&', and '%'.
|
|
/// </summary>
|
|
/// <param name="c">The character to check.</param>
|
|
public static bool IsMarkup(char c)
|
|
{
|
|
return c == '<' || c == '&' || c == '%';
|
|
}
|
|
|
|
public static bool IsMarkup(int c)
|
|
{
|
|
return c > 0 && c < CHARS.Length && (c == '<' || c == '&' || c == '%');
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the specified character is a space character
|
|
/// as defined by production [3] in the XML 1.0 specification.
|
|
/// </summary>
|
|
/// <param name="c">The character to check.</param>
|
|
/// <returns></returns>
|
|
public static bool IsWhitespace (char c)
|
|
{
|
|
return (CHARS[c] & SPACE) != 0;
|
|
}
|
|
|
|
public static bool IsWhitespace (int c)
|
|
{
|
|
return c > 0 && c < CHARS.Length && (CHARS[c] & SPACE) != 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the specified character is a valid name start
|
|
/// character as defined by production [5] in the XML 1.0 specification.
|
|
/// </summary>
|
|
/// <param name="c">The character to check.</param>
|
|
public static bool IsFirstNameChar (char c)
|
|
{
|
|
return (CHARS[c] & NAME_START) != 0;
|
|
}
|
|
|
|
public static bool IsFirstNameChar (int c)
|
|
{
|
|
return c > 0 && c < CHARS.Length && (CHARS[c] & NAME_START) != 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the specified character is a valid name
|
|
/// character as defined by production [4] in the XML 1.0 specification.
|
|
/// </summary>
|
|
/// <param name="c">The character to check.</param>
|
|
public static bool IsNameChar(char c)
|
|
{
|
|
return (CHARS[c] & NAME) != 0;
|
|
}
|
|
|
|
public static bool IsNameChar(int c)
|
|
{
|
|
return c > 0 && c < CHARS.Length && (CHARS[c] & NAME) != 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the specified character is a valid NCName start
|
|
/// character as defined by production [4] in Namespaces in XML
|
|
/// recommendation.
|
|
/// </summary>
|
|
/// <param name="c">The character to check.</param>
|
|
/// <returns></returns>
|
|
public static bool IsNCNameStart(char c)
|
|
{
|
|
return (CHARS[c] & NCNAME_START) != 0;
|
|
}
|
|
|
|
public static bool IsNCNameStart(int c)
|
|
{
|
|
return c > 0 && c < CHARS.Length && (CHARS[c] & NCNAME_START) != 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the specified character is a valid NCName
|
|
/// character as defined by production [5] in Namespaces in XML
|
|
/// recommendation.
|
|
/// </summary>
|
|
/// <param name="c"></param>
|
|
/// <returns></returns>
|
|
public static bool IsNCNameChar(char c)
|
|
{
|
|
return (CHARS[c] & NCNAME) != 0;
|
|
}
|
|
|
|
public static bool IsNCNameChar(int c)
|
|
{
|
|
return c > 0 && c < CHARS.Length && (CHARS[c] & NCNAME) != 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns true if the specified character is a valid Pubid
|
|
/// character as defined by production [13] in the XML 1.0 specification.
|
|
/// </summary>
|
|
/// <param name="c">The character to check</param>
|
|
public static bool IsPubidChar (char c)
|
|
{
|
|
return (CHARS[c] & PUBID) != 0;
|
|
}
|
|
|
|
public static bool IsPubidChar (int c)
|
|
{
|
|
return c > 0 && c < CHARS.Length && (CHARS[c] & PUBID) != 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check to see if a string is a valid Name according to [5]
|
|
/// in the XML 1.0 Recommendation
|
|
/// </summary>
|
|
/// <param name="name">The string to check</param>
|
|
public static bool IsValidName(String name, out Exception err)
|
|
{
|
|
err = null;
|
|
if (name.Length == 0)
|
|
{
|
|
err = new XmlException("Name can not be an empty string",null);
|
|
return false;
|
|
}
|
|
char ch = name[0];
|
|
if( IsFirstNameChar (ch) == false)
|
|
{
|
|
err = new XmlException("The character '"+ch+"' cannot start a Name",null);
|
|
return false;
|
|
}
|
|
for (int i = 1; i < name.Length; i++ )
|
|
{
|
|
ch = name[i];
|
|
if( IsNameChar (ch) == false )
|
|
{
|
|
err = new XmlException("The character '"+ch+"' is not allowed in a Name",null);
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
public static int IsValidName (string name)
|
|
{
|
|
if (name.Length == 0)
|
|
return 0;
|
|
if (!IsFirstNameChar (name [0]))
|
|
return 0;
|
|
for (int i=1; i<name.Length; i++)
|
|
if (!IsNameChar (name [i]))
|
|
return i;
|
|
return -1;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check to see if a string is a valid NCName according to [4]
|
|
/// from the XML Namespaces 1.0 Recommendation
|
|
/// </summary>
|
|
/// <param name="ncName">The string to check</param>
|
|
public static bool IsValidNCName(String ncName, out Exception err)
|
|
{
|
|
err = null;
|
|
if (ncName.Length == 0)
|
|
{
|
|
err = new XmlException("NCName can not be an empty string",null);
|
|
return false;
|
|
}
|
|
char ch = ncName[0];
|
|
if( IsNCNameStart(ch) == false)
|
|
{
|
|
err = new XmlException("The character '"+ch+"' cannot start a NCName",null);
|
|
return false;
|
|
}
|
|
for (int i = 1; i < ncName.Length; i++ )
|
|
{
|
|
ch = ncName[i];
|
|
if( IsNCNameChar (ch) == false )
|
|
{
|
|
err = new XmlException("The character '"+ch+"' is not allowed in a NCName",null);
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check to see if a string is a valid Nmtoken according to [7]
|
|
/// in the XML 1.0 Recommendation
|
|
/// </summary>
|
|
/// <param name="nmtoken">The string to check.</param>
|
|
public static bool IsValidNmtoken(String nmtoken, out Exception err)
|
|
{
|
|
err = null;
|
|
if (nmtoken.Length == 0)
|
|
{
|
|
err = new XmlException("NMTOKEN can not be an empty string", null);
|
|
return false;
|
|
}
|
|
for (int i = 0; i < nmtoken.Length; i++ )
|
|
{
|
|
char ch = nmtoken[i];
|
|
if( ! IsNameChar (ch) )
|
|
{
|
|
err = new XmlException("The character '"+ch+"' is not allowed in a NMTOKEN",null);
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// encodings
|
|
|
|
/// <summary>
|
|
/// Returns true if the encoding name is a valid IANA encoding.
|
|
/// This method does not verify that there is a decoder available
|
|
/// for this encoding, only that the characters are valid for an
|
|
/// IANA encoding name.
|
|
/// </summary>
|
|
/// <param name="ianaEncoding">The encoding to check.</param>
|
|
/// <returns></returns>
|
|
public static bool IsValidIANAEncoding(String ianaEncoding)
|
|
{
|
|
if (ianaEncoding != null)
|
|
{
|
|
int length = ianaEncoding.Length;
|
|
if (length > 0)
|
|
{
|
|
char c = ianaEncoding[0];
|
|
if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'))
|
|
{
|
|
for (int i = 1; i < length; i++)
|
|
{
|
|
c = ianaEncoding[i];
|
|
if ((c < 'A' || c > 'Z') && (c < 'a' || c > 'z') &&
|
|
(c < '0' || c > '9') && c != '.' && c != '_' &&
|
|
c != '-')
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public static bool IsName (string str)
|
|
{
|
|
if (str.Length == 0)
|
|
return false;
|
|
if (!IsFirstNameChar (str [0]))
|
|
return false;
|
|
for (int i = 1; i < str.Length; i++)
|
|
if (!IsNameChar (str [i]))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
public static bool IsNCName (string str)
|
|
{
|
|
if (str.Length == 0)
|
|
return false;
|
|
if (!IsFirstNameChar (str [0]))
|
|
return false;
|
|
for (int i = 0; i < str.Length; i++)
|
|
if (!IsNCNameChar (str [i]))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
public static bool IsNmToken (string str)
|
|
{
|
|
if (str.Length == 0)
|
|
return false;
|
|
for (int i = 0; i < str.Length; i++)
|
|
if (!IsNameChar (str [i]))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
public static bool IsWhitespace (string str)
|
|
{
|
|
for (int i = 0; i < str.Length; i++)
|
|
if (!IsWhitespace (str [i])) return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
public static int GetPredefinedEntity (string name)
|
|
{
|
|
switch (name) {
|
|
case "amp":
|
|
return '&';
|
|
case "lt":
|
|
return '<';
|
|
case "gt":
|
|
return '>';
|
|
case "quot":
|
|
return '"';
|
|
case "apos":
|
|
return '\'';
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
}
|