Matthew Xie | c74b546 | 2012-08-24 00:17:13 -0700 | [diff] [blame] | 1 | /*
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| 2 | Original code by Lee Thomason (www.grinninglizard.com)
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| 3 |
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| 4 | This software is provided 'as-is', without any express or implied
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| 5 | warranty. In no event will the authors be held liable for any
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| 6 | damages arising from the use of this software.
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| 7 |
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| 8 | Permission is granted to anyone to use this software for any
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| 9 | purpose, including commercial applications, and to alter it and
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| 10 | redistribute it freely, subject to the following restrictions:
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| 11 |
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| 12 | 1. The origin of this software must not be misrepresented; you must
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| 13 | not claim that you wrote the original software. If you use this
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| 14 | software in a product, an acknowledgment in the product documentation
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| 15 | would be appreciated but is not required.
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| 16 |
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| 17 | 2. Altered source versions must be plainly marked as such, and
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| 18 | must not be misrepresented as being the original software.
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| 19 |
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| 20 | 3. This notice may not be removed or altered from any source
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| 21 | distribution.
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| 22 | */
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| 23 |
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| 24 | #ifndef TINYXML2_INCLUDED
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| 25 | #define TINYXML2_INCLUDED
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| 26 |
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| 27 | #include <cctype>
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| 28 | #include <climits>
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| 29 | #include <cstdio>
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| 30 | #include <cstring>
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| 31 | //#include <cstdarg>
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| 32 | #include <stdarg.h>
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| 33 | /*
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| 34 | TODO: intern strings instead of allocation.
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| 35 | */
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| 36 | /*
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| 37 | gcc: g++ -Wall tinyxml2.cpp xmltest.cpp -o gccxmltest.exe
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| 38 | */
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| 39 |
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| 40 | #if defined( _DEBUG ) || defined( DEBUG ) || defined (__DEBUG__)
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| 41 | #ifndef DEBUG
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| 42 | #define DEBUG
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| 43 | #endif
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| 44 | #endif
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| 45 |
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| 46 |
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| 47 | #if defined(DEBUG)
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| 48 | #if defined(_MSC_VER)
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| 49 | #define TIXMLASSERT( x ) if ( !(x)) { __debugbreak(); } //if ( !(x)) WinDebugBreak()
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| 50 | #elif defined (ANDROID_NDK)
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| 51 | #include <android/log.h>
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| 52 | #define TIXMLASSERT( x ) if ( !(x)) { __android_log_assert( "assert", "grinliz", "ASSERT in '%s' at %d.", __FILE__, __LINE__ ); }
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| 53 | #else
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| 54 | #include <assert.h>
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| 55 | #define TIXMLASSERT assert
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| 56 | #endif
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| 57 | #else
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| 58 | #define TIXMLASSERT( x ) {}
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| 59 | #endif
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| 60 |
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| 61 |
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| 62 | #if defined(_MSC_VER) && (_MSC_VER >= 1400 )
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| 63 | // Microsoft visual studio, version 2005 and higher.
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| 64 | /*int _snprintf_s(
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| 65 | char *buffer,
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| 66 | size_t sizeOfBuffer,
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| 67 | size_t count,
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| 68 | const char *format [,
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| 69 | argument] ...
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| 70 | );*/
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| 71 | inline int TIXML_SNPRINTF( char* buffer, size_t size, const char* format, ... ) {
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| 72 | va_list va;
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| 73 | va_start( va, format );
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| 74 | int result = vsnprintf_s( buffer, size, _TRUNCATE, format, va );
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| 75 | va_end( va );
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| 76 | return result;
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| 77 | }
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| 78 | #define TIXML_SSCANF sscanf_s
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| 79 | #else
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| 80 | // GCC version 3 and higher
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| 81 | //#warning( "Using sn* functions." )
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| 82 | #define TIXML_SNPRINTF snprintf
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| 83 | #define TIXML_SSCANF sscanf
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| 84 | #endif
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| 85 |
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| 86 | static const int TIXML2_MAJOR_VERSION = 1;
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| 87 | static const int TIXML2_MINOR_VERSION = 0;
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| 88 | static const int TIXML2_PATCH_VERSION = 6;
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| 89 |
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| 90 | namespace tinyxml2
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| 91 | {
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| 92 | class XMLDocument;
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| 93 | class XMLElement;
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| 94 | class XMLAttribute;
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| 95 | class XMLComment;
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| 96 | class XMLNode;
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| 97 | class XMLText;
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| 98 | class XMLDeclaration;
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| 99 | class XMLUnknown;
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| 100 |
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| 101 | class XMLPrinter;
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| 102 |
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| 103 | /*
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| 104 | A class that wraps strings. Normally stores the start and end
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| 105 | pointers into the XML file itself, and will apply normalization
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| 106 | and entity translation if actually read. Can also store (and memory
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| 107 | manage) a traditional char[]
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| 108 | */
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| 109 | class StrPair
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| 110 | {
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| 111 | public:
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| 112 | enum {
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| 113 | NEEDS_ENTITY_PROCESSING = 0x01,
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| 114 | NEEDS_NEWLINE_NORMALIZATION = 0x02,
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| 115 |
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| 116 | TEXT_ELEMENT = NEEDS_ENTITY_PROCESSING | NEEDS_NEWLINE_NORMALIZATION,
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| 117 | TEXT_ELEMENT_LEAVE_ENTITIES = NEEDS_NEWLINE_NORMALIZATION,
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| 118 | ATTRIBUTE_NAME = 0,
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| 119 | ATTRIBUTE_VALUE = NEEDS_ENTITY_PROCESSING | NEEDS_NEWLINE_NORMALIZATION,
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| 120 | ATTRIBUTE_VALUE_LEAVE_ENTITIES = NEEDS_NEWLINE_NORMALIZATION,
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| 121 | COMMENT = NEEDS_NEWLINE_NORMALIZATION
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| 122 | };
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| 123 |
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| 124 | StrPair() : flags( 0 ), start( 0 ), end( 0 ) {}
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| 125 | ~StrPair();
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| 126 |
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| 127 | void Set( char* _start, char* _end, int _flags ) {
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| 128 | Reset();
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| 129 | this->start = _start; this->end = _end; this->flags = _flags | NEEDS_FLUSH;
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| 130 | }
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| 131 | const char* GetStr();
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| 132 | bool Empty() const { return start == end; }
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| 133 |
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| 134 | void SetInternedStr( const char* str ) { Reset(); this->start = const_cast<char*>(str); }
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| 135 | void SetStr( const char* str, int flags=0 );
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| 136 |
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| 137 | char* ParseText( char* in, const char* endTag, int strFlags );
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| 138 | char* ParseName( char* in );
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| 139 |
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| 140 |
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| 141 | private:
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| 142 | void Reset();
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| 143 |
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| 144 | enum {
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| 145 | NEEDS_FLUSH = 0x100,
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| 146 | NEEDS_DELETE = 0x200
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| 147 | };
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| 148 |
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| 149 | // After parsing, if *end != 0, it can be set to zero.
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| 150 | int flags;
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| 151 | char* start;
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| 152 | char* end;
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| 153 | };
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| 154 |
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| 155 |
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| 156 | /*
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| 157 | A dynamic array of Plain Old Data. Doesn't support constructors, etc.
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| 158 | Has a small initial memory pool, so that low or no usage will not
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| 159 | cause a call to new/delete
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| 160 | */
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| 161 | template <class T, int INIT>
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| 162 | class DynArray
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| 163 | {
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| 164 | public:
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| 165 | DynArray< T, INIT >()
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| 166 | {
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| 167 | mem = pool;
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| 168 | allocated = INIT;
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| 169 | size = 0;
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| 170 | }
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| 171 | ~DynArray()
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| 172 | {
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| 173 | if ( mem != pool ) {
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| 174 | delete [] mem;
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| 175 | }
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| 176 | }
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| 177 | void Push( T t )
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| 178 | {
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| 179 | EnsureCapacity( size+1 );
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| 180 | mem[size++] = t;
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| 181 | }
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| 182 |
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| 183 | T* PushArr( int count )
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| 184 | {
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| 185 | EnsureCapacity( size+count );
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| 186 | T* ret = &mem[size];
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| 187 | size += count;
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| 188 | return ret;
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| 189 | }
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| 190 | T Pop() {
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| 191 | return mem[--size];
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| 192 | }
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| 193 | void PopArr( int count )
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| 194 | {
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| 195 | TIXMLASSERT( size >= count );
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| 196 | size -= count;
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| 197 | }
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| 198 |
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| 199 | bool Empty() const { return size == 0; }
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| 200 | T& operator[](int i) { TIXMLASSERT( i>= 0 && i < size ); return mem[i]; }
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| 201 | const T& operator[](int i) const { TIXMLASSERT( i>= 0 && i < size ); return mem[i]; }
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| 202 | int Size() const { return size; }
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| 203 | int Capacity() const { return allocated; }
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| 204 | const T* Mem() const { return mem; }
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| 205 | T* Mem() { return mem; }
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| 206 |
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| 207 |
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| 208 | private:
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| 209 | void EnsureCapacity( int cap ) {
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| 210 | if ( cap > allocated ) {
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| 211 | int newAllocated = cap * 2;
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| 212 | T* newMem = new T[newAllocated];
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| 213 | memcpy( newMem, mem, sizeof(T)*size ); // warning: not using constructors, only works for PODs
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| 214 | if ( mem != pool ) delete [] mem;
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| 215 | mem = newMem;
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| 216 | allocated = newAllocated;
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| 217 | }
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| 218 | }
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| 219 |
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| 220 | T* mem;
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| 221 | T pool[INIT];
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| 222 | int allocated; // objects allocated
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| 223 | int size; // number objects in use
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| 224 | };
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| 225 |
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| 226 |
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| 227 | /*
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| 228 | Parent virtual class of a pool for fast allocation
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| 229 | and deallocation of objects.
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| 230 | */
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| 231 | class MemPool
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| 232 | {
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| 233 | public:
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| 234 | MemPool() {}
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| 235 | virtual ~MemPool() {}
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| 236 |
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| 237 | virtual int ItemSize() const = 0;
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| 238 | virtual void* Alloc() = 0;
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| 239 | virtual void Free( void* ) = 0;
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| 240 | };
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| 241 |
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| 242 |
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| 243 | /*
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| 244 | Template child class to create pools of the correct type.
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| 245 | */
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| 246 | template< int SIZE >
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| 247 | class MemPoolT : public MemPool
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| 248 | {
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| 249 | public:
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| 250 | MemPoolT() : root(0), currentAllocs(0), nAllocs(0), maxAllocs(0) {}
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| 251 | ~MemPoolT() {
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| 252 | // Delete the blocks.
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| 253 | for( int i=0; i<blockPtrs.Size(); ++i ) {
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| 254 | delete blockPtrs[i];
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| 255 | }
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| 256 | }
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| 257 |
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| 258 | virtual int ItemSize() const { return SIZE; }
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| 259 | int CurrentAllocs() const { return currentAllocs; }
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| 260 |
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| 261 | virtual void* Alloc() {
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| 262 | if ( !root ) {
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| 263 | // Need a new block.
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| 264 | Block* block = new Block();
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| 265 | blockPtrs.Push( block );
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| 266 |
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| 267 | for( int i=0; i<COUNT-1; ++i ) {
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| 268 | block->chunk[i].next = &block->chunk[i+1];
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| 269 | }
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| 270 | block->chunk[COUNT-1].next = 0;
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| 271 | root = block->chunk;
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| 272 | }
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| 273 | void* result = root;
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| 274 | root = root->next;
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| 275 |
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| 276 | ++currentAllocs;
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| 277 | if ( currentAllocs > maxAllocs ) maxAllocs = currentAllocs;
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| 278 | nAllocs++;
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| 279 | return result;
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| 280 | }
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| 281 | virtual void Free( void* mem ) {
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| 282 | if ( !mem ) return;
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| 283 | --currentAllocs;
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| 284 | Chunk* chunk = (Chunk*)mem;
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| 285 | memset( chunk, 0xfe, sizeof(Chunk) );
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| 286 | chunk->next = root;
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| 287 | root = chunk;
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| 288 | }
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| 289 | void Trace( const char* name ) {
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| 290 | printf( "Mempool %s watermark=%d [%dk] current=%d size=%d nAlloc=%d blocks=%d\n",
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| 291 | name, maxAllocs, maxAllocs*SIZE/1024, currentAllocs, SIZE, nAllocs, blockPtrs.Size() );
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| 292 | }
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| 293 |
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| 294 | private:
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| 295 | enum { COUNT = 1024/SIZE };
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| 296 | union Chunk {
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| 297 | Chunk* next;
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| 298 | char mem[SIZE];
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| 299 | };
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| 300 | struct Block {
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| 301 | Chunk chunk[COUNT];
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| 302 | };
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| 303 | DynArray< Block*, 10 > blockPtrs;
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| 304 | Chunk* root;
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| 305 |
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| 306 | int currentAllocs;
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| 307 | int nAllocs;
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| 308 | int maxAllocs;
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| 309 | };
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| 310 |
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| 311 |
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| 312 |
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| 313 | /**
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| 314 | Implements the interface to the "Visitor pattern" (see the Accept() method.)
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| 315 | If you call the Accept() method, it requires being passed a XMLVisitor
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| 316 | class to handle callbacks. For nodes that contain other nodes (Document, Element)
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| 317 | you will get called with a VisitEnter/VisitExit pair. Nodes that are always leafs
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| 318 | are simply called with Visit().
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| 319 |
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| 320 | If you return 'true' from a Visit method, recursive parsing will continue. If you return
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| 321 | false, <b>no children of this node or its sibilings</b> will be visited.
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| 322 |
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| 323 | All flavors of Visit methods have a default implementation that returns 'true' (continue
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| 324 | visiting). You need to only override methods that are interesting to you.
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| 325 |
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| 326 | Generally Accept() is called on the TiXmlDocument, although all nodes support visiting.
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| 327 |
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| 328 | You should never change the document from a callback.
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| 329 |
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| 330 | @sa XMLNode::Accept()
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| 331 | */
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| 332 | class XMLVisitor
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| 333 | {
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| 334 | public:
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| 335 | virtual ~XMLVisitor() {}
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| 336 |
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| 337 | /// Visit a document.
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| 338 | virtual bool VisitEnter( const XMLDocument& /*doc*/ ) { return true; }
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| 339 | /// Visit a document.
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| 340 | virtual bool VisitExit( const XMLDocument& /*doc*/ ) { return true; }
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| 341 |
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| 342 | /// Visit an element.
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| 343 | virtual bool VisitEnter( const XMLElement& /*element*/, const XMLAttribute* /*firstAttribute*/ ) { return true; }
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| 344 | /// Visit an element.
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| 345 | virtual bool VisitExit( const XMLElement& /*element*/ ) { return true; }
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| 346 |
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| 347 | /// Visit a declaration.
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| 348 | virtual bool Visit( const XMLDeclaration& /*declaration*/ ) { return true; }
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| 349 | /// Visit a text node.
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| 350 | virtual bool Visit( const XMLText& /*text*/ ) { return true; }
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| 351 | /// Visit a comment node.
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| 352 | virtual bool Visit( const XMLComment& /*comment*/ ) { return true; }
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| 353 | /// Visit an unknown node.
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| 354 | virtual bool Visit( const XMLUnknown& /*unknown*/ ) { return true; }
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| 355 | };
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| 356 |
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| 357 |
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| 358 | /*
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| 359 | Utility functionality.
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| 360 | */
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| 361 | class XMLUtil
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| 362 | {
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| 363 | public:
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| 364 | // Anything in the high order range of UTF-8 is assumed to not be whitespace. This isn't
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| 365 | // correct, but simple, and usually works.
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| 366 | static const char* SkipWhiteSpace( const char* p ) { while( !IsUTF8Continuation(*p) && isspace( *reinterpret_cast<const unsigned char*>(p) ) ) { ++p; } return p; }
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| 367 | static char* SkipWhiteSpace( char* p ) { while( !IsUTF8Continuation(*p) && isspace( *reinterpret_cast<unsigned char*>(p) ) ) { ++p; } return p; }
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| 368 |
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| 369 | inline static bool StringEqual( const char* p, const char* q, int nChar=INT_MAX ) {
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| 370 | int n = 0;
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| 371 | if ( p == q ) {
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| 372 | return true;
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| 373 | }
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| 374 | while( *p && *q && *p == *q && n<nChar ) {
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| 375 | ++p; ++q; ++n;
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| 376 | }
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| 377 | if ( (n == nChar) || ( *p == 0 && *q == 0 ) ) {
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| 378 | return true;
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| 379 | }
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| 380 | return false;
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| 381 | }
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| 382 | inline static int IsUTF8Continuation( const char p ) { return p & 0x80; }
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| 383 | inline static int IsAlphaNum( unsigned char anyByte ) { return ( anyByte < 128 ) ? isalnum( anyByte ) : 1; }
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| 384 | inline static int IsAlpha( unsigned char anyByte ) { return ( anyByte < 128 ) ? isalpha( anyByte ) : 1; }
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| 385 |
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| 386 | static const char* ReadBOM( const char* p, bool* hasBOM );
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| 387 | // p is the starting location,
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| 388 | // the UTF-8 value of the entity will be placed in value, and length filled in.
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| 389 | static const char* GetCharacterRef( const char* p, char* value, int* length );
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| 390 | static void ConvertUTF32ToUTF8( unsigned long input, char* output, int* length );
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| 391 |
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| 392 | // converts primitive types to strings
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| 393 | static void ToStr( int v, char* buffer, int bufferSize );
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| 394 | static void ToStr( unsigned v, char* buffer, int bufferSize );
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| 395 | static void ToStr( bool v, char* buffer, int bufferSize );
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| 396 | static void ToStr( float v, char* buffer, int bufferSize );
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| 397 | static void ToStr( double v, char* buffer, int bufferSize );
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| 398 |
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| 399 | // converts strings to primitive types
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| 400 | static bool ToInt( const char* str, int* value );
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| 401 | static bool ToUnsigned( const char* str, unsigned* value );
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| 402 | static bool ToBool( const char* str, bool* value );
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| 403 | static bool ToFloat( const char* str, float* value );
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| 404 | static bool ToDouble( const char* str, double* value );
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| 405 | };
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| 406 |
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| 407 |
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| 408 | /** XMLNode is a base class for every object that is in the
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| 409 | XML Document Object Model (DOM), except XMLAttributes.
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| 410 | Nodes have siblings, a parent, and children which can
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| 411 | be navigated. A node is always in a XMLDocument.
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| 412 | The type of a XMLNode can be queried, and it can
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| 413 | be cast to its more defined type.
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| 414 |
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| 415 | A XMLDocument allocates memory for all its Nodes.
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| 416 | When the XMLDocument gets deleted, all its Nodes
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| 417 | will also be deleted.
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| 418 |
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| 419 | @verbatim
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| 420 | A Document can contain: Element (container or leaf)
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| 421 | Comment (leaf)
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| 422 | Unknown (leaf)
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| 423 | Declaration( leaf )
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| 424 |
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| 425 | An Element can contain: Element (container or leaf)
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| 426 | Text (leaf)
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| 427 | Attributes (not on tree)
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| 428 | Comment (leaf)
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| 429 | Unknown (leaf)
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| 430 |
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| 431 | @endverbatim
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| 432 | */
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| 433 | class XMLNode
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| 434 | {
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| 435 | friend class XMLDocument;
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| 436 | friend class XMLElement;
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| 437 | public:
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| 438 |
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| 439 | /// Get the XMLDocument that owns this XMLNode.
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| 440 | const XMLDocument* GetDocument() const { return document; }
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| 441 | /// Get the XMLDocument that owns this XMLNode.
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| 442 | XMLDocument* GetDocument() { return document; }
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| 443 |
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| 444 | virtual XMLElement* ToElement() { return 0; } ///< Safely cast to an Element, or null.
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| 445 | virtual XMLText* ToText() { return 0; } ///< Safely cast to Text, or null.
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| 446 | virtual XMLComment* ToComment() { return 0; } ///< Safely cast to a Comment, or null.
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| 447 | virtual XMLDocument* ToDocument() { return 0; } ///< Safely cast to a Document, or null.
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| 448 | virtual XMLDeclaration* ToDeclaration() { return 0; } ///< Safely cast to a Declaration, or null.
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| 449 | virtual XMLUnknown* ToUnknown() { return 0; } ///< Safely cast to an Unknown, or null.
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| 450 |
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| 451 | virtual const XMLElement* ToElement() const { return 0; }
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| 452 | virtual const XMLText* ToText() const { return 0; }
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| 453 | virtual const XMLComment* ToComment() const { return 0; }
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| 454 | virtual const XMLDocument* ToDocument() const { return 0; }
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| 455 | virtual const XMLDeclaration* ToDeclaration() const { return 0; }
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| 456 | virtual const XMLUnknown* ToUnknown() const { return 0; }
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| 457 |
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| 458 | /** The meaning of 'value' changes for the specific type.
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| 459 | @verbatim
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| 460 | Document: empty
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| 461 | Element: name of the element
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| 462 | Comment: the comment text
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| 463 | Unknown: the tag contents
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| 464 | Text: the text string
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| 465 | @endverbatim
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| 466 | */
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| 467 | const char* Value() const { return value.GetStr(); }
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| 468 | /** Set the Value of an XML node.
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| 469 | @sa Value()
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| 470 | */
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| 471 | void SetValue( const char* val, bool staticMem=false );
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| 472 |
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| 473 | /// Get the parent of this node on the DOM.
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| 474 | const XMLNode* Parent() const { return parent; }
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| 475 | XMLNode* Parent() { return parent; }
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| 476 |
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| 477 | /// Returns true if this node has no children.
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| 478 | bool NoChildren() const { return !firstChild; }
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| 479 |
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| 480 | /// Get the first child node, or null if none exists.
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| 481 | const XMLNode* FirstChild() const { return firstChild; }
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| 482 | XMLNode* FirstChild() { return firstChild; }
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| 483 | /** Get the first child element, or optionally the first child
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| 484 | element with the specified name.
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| 485 | */
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| 486 | const XMLElement* FirstChildElement( const char* value=0 ) const;
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| 487 | XMLElement* FirstChildElement( const char* _value=0 ) { return const_cast<XMLElement*>(const_cast<const XMLNode*>(this)->FirstChildElement( _value )); }
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| 488 |
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| 489 | /// Get the last child node, or null if none exists.
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| 490 | const XMLNode* LastChild() const { return lastChild; }
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| 491 | XMLNode* LastChild() { return const_cast<XMLNode*>(const_cast<const XMLNode*>(this)->LastChild() ); }
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| 492 |
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| 493 | /** Get the last child element or optionally the last child
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| 494 | element with the specified name.
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| 495 | */
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| 496 | const XMLElement* LastChildElement( const char* value=0 ) const;
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| 497 | XMLElement* LastChildElement( const char* _value=0 ) { return const_cast<XMLElement*>(const_cast<const XMLNode*>(this)->LastChildElement(_value) ); }
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| 498 |
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| 499 | /// Get the previous (left) sibling node of this node.
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| 500 | const XMLNode* PreviousSibling() const { return prev; }
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| 501 | XMLNode* PreviousSibling() { return prev; }
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| 502 |
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| 503 | /// Get the previous (left) sibling element of this node, with an opitionally supplied name.
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| 504 | const XMLElement* PreviousSiblingElement( const char* value=0 ) const ;
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| 505 | XMLElement* PreviousSiblingElement( const char* _value=0 ) { return const_cast<XMLElement*>(const_cast<const XMLNode*>(this)->PreviousSiblingElement( _value ) ); }
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| 506 |
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| 507 | /// Get the next (right) sibling node of this node.
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| 508 | const XMLNode* NextSibling() const { return next; }
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| 509 | XMLNode* NextSibling() { return next; }
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| 510 |
|
| 511 | /// Get the next (right) sibling element of this node, with an opitionally supplied name.
|
| 512 | const XMLElement* NextSiblingElement( const char* value=0 ) const;
|
| 513 | XMLElement* NextSiblingElement( const char* _value=0 ) { return const_cast<XMLElement*>(const_cast<const XMLNode*>(this)->NextSiblingElement( _value ) ); }
|
| 514 |
|
| 515 | /**
|
| 516 | Add a child node as the last (right) child.
|
| 517 | */
|
| 518 | XMLNode* InsertEndChild( XMLNode* addThis );
|
| 519 |
|
| 520 | XMLNode* LinkEndChild( XMLNode* addThis ) { return InsertEndChild( addThis ); }
|
| 521 | /**
|
| 522 | Add a child node as the first (left) child.
|
| 523 | */
|
| 524 | XMLNode* InsertFirstChild( XMLNode* addThis );
|
| 525 | /**
|
| 526 | Add a node after the specified child node.
|
| 527 | */
|
| 528 | XMLNode* InsertAfterChild( XMLNode* afterThis, XMLNode* addThis );
|
| 529 |
|
| 530 | /**
|
| 531 | Delete all the children of this node.
|
| 532 | */
|
| 533 | void DeleteChildren();
|
| 534 |
|
| 535 | /**
|
| 536 | Delete a child of this node.
|
| 537 | */
|
| 538 | void DeleteChild( XMLNode* node );
|
| 539 |
|
| 540 | /**
|
| 541 | Make a copy of this node, but not its children.
|
| 542 | You may pass in a Document pointer that will be
|
| 543 | the owner of the new Node. If the 'document' is
|
| 544 | null, then the node returned will be allocated
|
| 545 | from the current Document. (this->GetDocument())
|
| 546 |
|
| 547 | Note: if called on a XMLDocument, this will return null.
|
| 548 | */
|
| 549 | virtual XMLNode* ShallowClone( XMLDocument* document ) const = 0;
|
| 550 |
|
| 551 | /**
|
| 552 | Test if 2 nodes are the same, but don't test children.
|
| 553 | The 2 nodes do not need to be in the same Document.
|
| 554 |
|
| 555 | Note: if called on a XMLDocument, this will return false.
|
| 556 | */
|
| 557 | virtual bool ShallowEqual( const XMLNode* compare ) const = 0;
|
| 558 |
|
| 559 | /** Accept a hierarchical visit of the nodes in the TinyXML DOM. Every node in the
|
| 560 | XML tree will be conditionally visited and the host will be called back
|
| 561 | via the TiXmlVisitor interface.
|
| 562 |
|
| 563 | This is essentially a SAX interface for TinyXML. (Note however it doesn't re-parse
|
| 564 | the XML for the callbacks, so the performance of TinyXML is unchanged by using this
|
| 565 | interface versus any other.)
|
| 566 |
|
| 567 | The interface has been based on ideas from:
|
| 568 |
|
| 569 | - http://www.saxproject.org/
|
| 570 | - http://c2.com/cgi/wiki?HierarchicalVisitorPattern
|
| 571 |
|
| 572 | Which are both good references for "visiting".
|
| 573 |
|
| 574 | An example of using Accept():
|
| 575 | @verbatim
|
| 576 | TiXmlPrinter printer;
|
| 577 | tinyxmlDoc.Accept( &printer );
|
| 578 | const char* xmlcstr = printer.CStr();
|
| 579 | @endverbatim
|
| 580 | */
|
| 581 | virtual bool Accept( XMLVisitor* visitor ) const = 0;
|
| 582 |
|
| 583 | // internal
|
| 584 | virtual char* ParseDeep( char*, StrPair* );
|
| 585 |
|
| 586 | protected:
|
| 587 | XMLNode( XMLDocument* );
|
| 588 | virtual ~XMLNode();
|
| 589 | XMLNode( const XMLNode& ); // not supported
|
| 590 | XMLNode& operator=( const XMLNode& ); // not supported
|
| 591 |
|
| 592 | XMLDocument* document;
|
| 593 | XMLNode* parent;
|
| 594 | mutable StrPair value;
|
| 595 |
|
| 596 | XMLNode* firstChild;
|
| 597 | XMLNode* lastChild;
|
| 598 |
|
| 599 | XMLNode* prev;
|
| 600 | XMLNode* next;
|
| 601 |
|
| 602 | private:
|
| 603 | MemPool* memPool;
|
| 604 | void Unlink( XMLNode* child );
|
| 605 | };
|
| 606 |
|
| 607 |
|
| 608 | /** XML text.
|
| 609 |
|
| 610 | Note that a text node can have child element nodes, for example:
|
| 611 | @verbatim
|
| 612 | <root>This is <b>bold</b></root>
|
| 613 | @endverbatim
|
| 614 |
|
| 615 | A text node can have 2 ways to output the next. "normal" output
|
| 616 | and CDATA. It will default to the mode it was parsed from the XML file and
|
| 617 | you generally want to leave it alone, but you can change the output mode with
|
| 618 | SetCDATA() and query it with CDATA().
|
| 619 | */
|
| 620 | class XMLText : public XMLNode
|
| 621 | {
|
| 622 | friend class XMLBase;
|
| 623 | friend class XMLDocument;
|
| 624 | public:
|
| 625 | virtual bool Accept( XMLVisitor* visitor ) const;
|
| 626 |
|
| 627 | virtual XMLText* ToText() { return this; }
|
| 628 | virtual const XMLText* ToText() const { return this; }
|
| 629 |
|
| 630 | /// Declare whether this should be CDATA or standard text.
|
| 631 | void SetCData( bool _isCData ) { this->isCData = _isCData; }
|
| 632 | /// Returns true if this is a CDATA text element.
|
| 633 | bool CData() const { return isCData; }
|
| 634 |
|
| 635 | char* ParseDeep( char*, StrPair* endTag );
|
| 636 | virtual XMLNode* ShallowClone( XMLDocument* document ) const;
|
| 637 | virtual bool ShallowEqual( const XMLNode* compare ) const;
|
| 638 |
|
| 639 |
|
| 640 | protected:
|
| 641 | XMLText( XMLDocument* doc ) : XMLNode( doc ), isCData( false ) {}
|
| 642 | virtual ~XMLText() {}
|
| 643 | XMLText( const XMLText& ); // not supported
|
| 644 | XMLText& operator=( const XMLText& ); // not supported
|
| 645 |
|
| 646 | private:
|
| 647 | bool isCData;
|
| 648 | };
|
| 649 |
|
| 650 |
|
| 651 | /** An XML Comment. */
|
| 652 | class XMLComment : public XMLNode
|
| 653 | {
|
| 654 | friend class XMLDocument;
|
| 655 | public:
|
| 656 | virtual XMLComment* ToComment() { return this; }
|
| 657 | virtual const XMLComment* ToComment() const { return this; }
|
| 658 |
|
| 659 | virtual bool Accept( XMLVisitor* visitor ) const;
|
| 660 |
|
| 661 | char* ParseDeep( char*, StrPair* endTag );
|
| 662 | virtual XMLNode* ShallowClone( XMLDocument* document ) const;
|
| 663 | virtual bool ShallowEqual( const XMLNode* compare ) const;
|
| 664 |
|
| 665 | protected:
|
| 666 | XMLComment( XMLDocument* doc );
|
| 667 | virtual ~XMLComment();
|
| 668 | XMLComment( const XMLComment& ); // not supported
|
| 669 | XMLComment& operator=( const XMLComment& ); // not supported
|
| 670 |
|
| 671 | private:
|
| 672 | };
|
| 673 |
|
| 674 |
|
| 675 | /** In correct XML the declaration is the first entry in the file.
|
| 676 | @verbatim
|
| 677 | <?xml version="1.0" standalone="yes"?>
|
| 678 | @endverbatim
|
| 679 |
|
| 680 | TinyXML2 will happily read or write files without a declaration,
|
| 681 | however.
|
| 682 |
|
| 683 | The text of the declaration isn't interpreted. It is parsed
|
| 684 | and written as a string.
|
| 685 | */
|
| 686 | class XMLDeclaration : public XMLNode
|
| 687 | {
|
| 688 | friend class XMLDocument;
|
| 689 | public:
|
| 690 | virtual XMLDeclaration* ToDeclaration() { return this; }
|
| 691 | virtual const XMLDeclaration* ToDeclaration() const { return this; }
|
| 692 |
|
| 693 | virtual bool Accept( XMLVisitor* visitor ) const;
|
| 694 |
|
| 695 | char* ParseDeep( char*, StrPair* endTag );
|
| 696 | virtual XMLNode* ShallowClone( XMLDocument* document ) const;
|
| 697 | virtual bool ShallowEqual( const XMLNode* compare ) const;
|
| 698 |
|
| 699 | protected:
|
| 700 | XMLDeclaration( XMLDocument* doc );
|
| 701 | virtual ~XMLDeclaration();
|
| 702 | XMLDeclaration( const XMLDeclaration& ); // not supported
|
| 703 | XMLDeclaration& operator=( const XMLDeclaration& ); // not supported
|
| 704 | };
|
| 705 |
|
| 706 |
|
| 707 | /** Any tag that tinyXml doesn't recognize is saved as an
|
| 708 | unknown. It is a tag of text, but should not be modified.
|
| 709 | It will be written back to the XML, unchanged, when the file
|
| 710 | is saved.
|
| 711 |
|
| 712 | DTD tags get thrown into TiXmlUnknowns.
|
| 713 | */
|
| 714 | class XMLUnknown : public XMLNode
|
| 715 | {
|
| 716 | friend class XMLDocument;
|
| 717 | public:
|
| 718 | virtual XMLUnknown* ToUnknown() { return this; }
|
| 719 | virtual const XMLUnknown* ToUnknown() const { return this; }
|
| 720 |
|
| 721 | virtual bool Accept( XMLVisitor* visitor ) const;
|
| 722 |
|
| 723 | char* ParseDeep( char*, StrPair* endTag );
|
| 724 | virtual XMLNode* ShallowClone( XMLDocument* document ) const;
|
| 725 | virtual bool ShallowEqual( const XMLNode* compare ) const;
|
| 726 |
|
| 727 | protected:
|
| 728 | XMLUnknown( XMLDocument* doc );
|
| 729 | virtual ~XMLUnknown();
|
| 730 | XMLUnknown( const XMLUnknown& ); // not supported
|
| 731 | XMLUnknown& operator=( const XMLUnknown& ); // not supported
|
| 732 | };
|
| 733 |
|
| 734 |
|
| 735 | enum {
|
| 736 | XML_NO_ERROR = 0,
|
| 737 | XML_SUCCESS = 0,
|
| 738 |
|
| 739 | XML_NO_ATTRIBUTE,
|
| 740 | XML_WRONG_ATTRIBUTE_TYPE,
|
| 741 |
|
| 742 | XML_ERROR_FILE_NOT_FOUND,
|
| 743 | XML_ERROR_FILE_COULD_NOT_BE_OPENED,
|
| 744 | XML_ERROR_FILE_READ_ERROR,
|
| 745 | XML_ERROR_ELEMENT_MISMATCH,
|
| 746 | XML_ERROR_PARSING_ELEMENT,
|
| 747 | XML_ERROR_PARSING_ATTRIBUTE,
|
| 748 | XML_ERROR_IDENTIFYING_TAG,
|
| 749 | XML_ERROR_PARSING_TEXT,
|
| 750 | XML_ERROR_PARSING_CDATA,
|
| 751 | XML_ERROR_PARSING_COMMENT,
|
| 752 | XML_ERROR_PARSING_DECLARATION,
|
| 753 | XML_ERROR_PARSING_UNKNOWN,
|
| 754 | XML_ERROR_EMPTY_DOCUMENT,
|
| 755 | XML_ERROR_MISMATCHED_ELEMENT,
|
| 756 | XML_ERROR_PARSING,
|
| 757 |
|
| 758 | XML_CAN_NOT_CONVERT_TEXT,
|
| 759 | XML_NO_TEXT_NODE
|
| 760 | };
|
| 761 |
|
| 762 |
|
| 763 | /** An attribute is a name-value pair. Elements have an arbitrary
|
| 764 | number of attributes, each with a unique name.
|
| 765 |
|
| 766 | @note The attributes are not XMLNodes. You may only query the
|
| 767 | Next() attribute in a list.
|
| 768 | */
|
| 769 | class XMLAttribute
|
| 770 | {
|
| 771 | friend class XMLElement;
|
| 772 | public:
|
| 773 | const char* Name() const { return name.GetStr(); } ///< The name of the attribute.
|
| 774 | const char* Value() const { return value.GetStr(); } ///< The value of the attribute.
|
| 775 | const XMLAttribute* Next() const { return next; } ///< The next attribute in the list.
|
| 776 |
|
| 777 | /** IntAttribute interprets the attribute as an integer, and returns the value.
|
| 778 | If the value isn't an integer, 0 will be returned. There is no error checking;
|
| 779 | use QueryIntAttribute() if you need error checking.
|
| 780 | */
|
| 781 | int IntValue() const { int i=0; QueryIntValue( &i ); return i; }
|
| 782 | /// Query as an unsigned integer. See IntAttribute()
|
| 783 | unsigned UnsignedValue() const { unsigned i=0; QueryUnsignedValue( &i ); return i; }
|
| 784 | /// Query as a boolean. See IntAttribute()
|
| 785 | bool BoolValue() const { bool b=false; QueryBoolValue( &b ); return b; }
|
| 786 | /// Query as a double. See IntAttribute()
|
| 787 | double DoubleValue() const { double d=0; QueryDoubleValue( &d ); return d; }
|
| 788 | /// Query as a float. See IntAttribute()
|
| 789 | float FloatValue() const { float f=0; QueryFloatValue( &f ); return f; }
|
| 790 |
|
| 791 | /** QueryIntAttribute interprets the attribute as an integer, and returns the value
|
| 792 | in the provided paremeter. The function will return XML_NO_ERROR on success,
|
| 793 | and XML_WRONG_ATTRIBUTE_TYPE if the conversion is not successful.
|
| 794 | */
|
| 795 | int QueryIntValue( int* value ) const;
|
| 796 | /// See QueryIntAttribute
|
| 797 | int QueryUnsignedValue( unsigned int* value ) const;
|
| 798 | /// See QueryIntAttribute
|
| 799 | int QueryBoolValue( bool* value ) const;
|
| 800 | /// See QueryIntAttribute
|
| 801 | int QueryDoubleValue( double* value ) const;
|
| 802 | /// See QueryIntAttribute
|
| 803 | int QueryFloatValue( float* value ) const;
|
| 804 |
|
| 805 | /// Set the attribute to a string value.
|
| 806 | void SetAttribute( const char* value );
|
| 807 | /// Set the attribute to value.
|
| 808 | void SetAttribute( int value );
|
| 809 | /// Set the attribute to value.
|
| 810 | void SetAttribute( unsigned value );
|
| 811 | /// Set the attribute to value.
|
| 812 | void SetAttribute( bool value );
|
| 813 | /// Set the attribute to value.
|
| 814 | void SetAttribute( double value );
|
| 815 | /// Set the attribute to value.
|
| 816 | void SetAttribute( float value );
|
| 817 |
|
| 818 | private:
|
| 819 | enum { BUF_SIZE = 200 };
|
| 820 |
|
| 821 | XMLAttribute() : next( 0 ) {}
|
| 822 | virtual ~XMLAttribute() {}
|
| 823 | XMLAttribute( const XMLAttribute& ); // not supported
|
| 824 | void operator=( const XMLAttribute& ); // not supported
|
| 825 | void SetName( const char* name );
|
| 826 |
|
| 827 | char* ParseDeep( char* p, bool processEntities );
|
| 828 |
|
| 829 | mutable StrPair name;
|
| 830 | mutable StrPair value;
|
| 831 | XMLAttribute* next;
|
| 832 | MemPool* memPool;
|
| 833 | };
|
| 834 |
|
| 835 |
|
| 836 | /** The element is a container class. It has a value, the element name,
|
| 837 | and can contain other elements, text, comments, and unknowns.
|
| 838 | Elements also contain an arbitrary number of attributes.
|
| 839 | */
|
| 840 | class XMLElement : public XMLNode
|
| 841 | {
|
| 842 | friend class XMLBase;
|
| 843 | friend class XMLDocument;
|
| 844 | public:
|
| 845 | /// Get the name of an element (which is the Value() of the node.)
|
| 846 | const char* Name() const { return Value(); }
|
| 847 | /// Set the name of the element.
|
| 848 | void SetName( const char* str, bool staticMem=false ) { SetValue( str, staticMem ); }
|
| 849 |
|
| 850 | virtual XMLElement* ToElement() { return this; }
|
| 851 | virtual const XMLElement* ToElement() const { return this; }
|
| 852 | virtual bool Accept( XMLVisitor* visitor ) const;
|
| 853 |
|
| 854 | /** Given an attribute name, Attribute() returns the value
|
| 855 | for the attribute of that name, or null if none
|
| 856 | exists. For example:
|
| 857 |
|
| 858 | @verbatim
|
| 859 | const char* value = ele->Attribute( "foo" );
|
| 860 | @endverbatim
|
| 861 |
|
| 862 | The 'value' parameter is normally null. However, if specified,
|
| 863 | the attribute will only be returned if the 'name' and 'value'
|
| 864 | match. This allow you to write code:
|
| 865 |
|
| 866 | @verbatim
|
| 867 | if ( ele->Attribute( "foo", "bar" ) ) callFooIsBar();
|
| 868 | @endverbatim
|
| 869 |
|
| 870 | rather than:
|
| 871 | @verbatim
|
| 872 | if ( ele->Attribute( "foo" ) ) {
|
| 873 | if ( strcmp( ele->Attribute( "foo" ), "bar" ) == 0 ) callFooIsBar();
|
| 874 | }
|
| 875 | @endverbatim
|
| 876 | */
|
| 877 | const char* Attribute( const char* name, const char* value=0 ) const;
|
| 878 |
|
| 879 | /** Given an attribute name, IntAttribute() returns the value
|
| 880 | of the attribute interpreted as an integer. 0 will be
|
| 881 | returned if there is an error. For a method with error
|
| 882 | checking, see QueryIntAttribute()
|
| 883 | */
|
| 884 | int IntAttribute( const char* name ) const { int i=0; QueryIntAttribute( name, &i ); return i; }
|
| 885 | /// See IntAttribute()
|
| 886 | unsigned UnsignedAttribute( const char* name ) const{ unsigned i=0; QueryUnsignedAttribute( name, &i ); return i; }
|
| 887 | /// See IntAttribute()
|
| 888 | bool BoolAttribute( const char* name ) const { bool b=false; QueryBoolAttribute( name, &b ); return b; }
|
| 889 | /// See IntAttribute()
|
| 890 | double DoubleAttribute( const char* name ) const { double d=0; QueryDoubleAttribute( name, &d ); return d; }
|
| 891 | /// See IntAttribute()
|
| 892 | float FloatAttribute( const char* name ) const { float f=0; QueryFloatAttribute( name, &f ); return f; }
|
| 893 |
|
| 894 | /** Given an attribute name, QueryIntAttribute() returns
|
| 895 | XML_NO_ERROR, XML_WRONG_ATTRIBUTE_TYPE if the conversion
|
| 896 | can't be performed, or XML_NO_ATTRIBUTE if the attribute
|
| 897 | doesn't exist. If successful, the result of the conversion
|
| 898 | will be written to 'value'. If not successful, nothing will
|
| 899 | be written to 'value'. This allows you to provide default
|
| 900 | value:
|
| 901 |
|
| 902 | @verbatim
|
| 903 | int value = 10;
|
| 904 | QueryIntAttribute( "foo", &value ); // if "foo" isn't found, value will still be 10
|
| 905 | @endverbatim
|
| 906 | */
|
| 907 | int QueryIntAttribute( const char* name, int* _value ) const { const XMLAttribute* a = FindAttribute( name ); if ( !a ) return XML_NO_ATTRIBUTE; return a->QueryIntValue( _value ); }
|
| 908 | /// See QueryIntAttribute()
|
| 909 | int QueryUnsignedAttribute( const char* name, unsigned int* _value ) const { const XMLAttribute* a = FindAttribute( name ); if ( !a ) return XML_NO_ATTRIBUTE; return a->QueryUnsignedValue( _value ); }
|
| 910 | /// See QueryIntAttribute()
|
| 911 | int QueryBoolAttribute( const char* name, bool* _value ) const { const XMLAttribute* a = FindAttribute( name ); if ( !a ) return XML_NO_ATTRIBUTE; return a->QueryBoolValue( _value ); }
|
| 912 | /// See QueryIntAttribute()
|
| 913 | int QueryDoubleAttribute( const char* name, double* _value ) const { const XMLAttribute* a = FindAttribute( name ); if ( !a ) return XML_NO_ATTRIBUTE; return a->QueryDoubleValue( _value ); }
|
| 914 | /// See QueryIntAttribute()
|
| 915 | int QueryFloatAttribute( const char* name, float* _value ) const { const XMLAttribute* a = FindAttribute( name ); if ( !a ) return XML_NO_ATTRIBUTE; return a->QueryFloatValue( _value ); }
|
| 916 |
|
| 917 | /// Sets the named attribute to value.
|
| 918 | void SetAttribute( const char* name, const char* _value ) { XMLAttribute* a = FindOrCreateAttribute( name ); a->SetAttribute( _value ); }
|
| 919 | /// Sets the named attribute to value.
|
| 920 | void SetAttribute( const char* name, int _value ) { XMLAttribute* a = FindOrCreateAttribute( name ); a->SetAttribute( _value ); }
|
| 921 | /// Sets the named attribute to value.
|
| 922 | void SetAttribute( const char* name, unsigned _value ) { XMLAttribute* a = FindOrCreateAttribute( name ); a->SetAttribute( _value ); }
|
| 923 | /// Sets the named attribute to value.
|
| 924 | void SetAttribute( const char* name, bool _value ) { XMLAttribute* a = FindOrCreateAttribute( name ); a->SetAttribute( _value ); }
|
| 925 | /// Sets the named attribute to value.
|
| 926 | void SetAttribute( const char* name, double _value ) { XMLAttribute* a = FindOrCreateAttribute( name ); a->SetAttribute( _value ); }
|
| 927 |
|
| 928 | /**
|
| 929 | Delete an attribute.
|
| 930 | */
|
| 931 | void DeleteAttribute( const char* name );
|
| 932 |
|
| 933 | /// Return the first attribute in the list.
|
| 934 | const XMLAttribute* FirstAttribute() const { return rootAttribute; }
|
| 935 | /// Query a specific attribute in the list.
|
| 936 | const XMLAttribute* FindAttribute( const char* name ) const;
|
| 937 |
|
| 938 | /** Convenience function for easy access to the text inside an element. Although easy
|
| 939 | and concise, GetText() is limited compared to getting the TiXmlText child
|
| 940 | and accessing it directly.
|
| 941 |
|
| 942 | If the first child of 'this' is a TiXmlText, the GetText()
|
| 943 | returns the character string of the Text node, else null is returned.
|
| 944 |
|
| 945 | This is a convenient method for getting the text of simple contained text:
|
| 946 | @verbatim
|
| 947 | <foo>This is text</foo>
|
| 948 | const char* str = fooElement->GetText();
|
| 949 | @endverbatim
|
| 950 |
|
| 951 | 'str' will be a pointer to "This is text".
|
| 952 |
|
| 953 | Note that this function can be misleading. If the element foo was created from
|
| 954 | this XML:
|
| 955 | @verbatim
|
| 956 | <foo><b>This is text</b></foo>
|
| 957 | @endverbatim
|
| 958 |
|
| 959 | then the value of str would be null. The first child node isn't a text node, it is
|
| 960 | another element. From this XML:
|
| 961 | @verbatim
|
| 962 | <foo>This is <b>text</b></foo>
|
| 963 | @endverbatim
|
| 964 | GetText() will return "This is ".
|
| 965 | */
|
| 966 | const char* GetText() const;
|
| 967 |
|
| 968 | /**
|
| 969 | Convenience method to query the value of a child text node. This is probably best
|
| 970 | shown by example. Given you have a document is this form:
|
| 971 | @verbatim
|
| 972 | <point>
|
| 973 | <x>1</x>
|
| 974 | <y>1.4</y>
|
| 975 | </point>
|
| 976 | @endverbatim
|
| 977 |
|
| 978 | The QueryIntText() and similar functions provide a safe and easier way to get to the
|
| 979 | "value" of x and y.
|
| 980 |
|
| 981 | @verbatim
|
| 982 | int x = 0;
|
| 983 | float y = 0; // types of x and y are contrived for example
|
| 984 | const XMLElement* xElement = pointElement->FirstChildElement( "x" );
|
| 985 | const XMLElement* yElement = pointElement->FirstChildElement( "y" );
|
| 986 | xElement->QueryIntText( &x );
|
| 987 | yElement->QueryFloatText( &y );
|
| 988 | @endverbatim
|
| 989 |
|
| 990 | @returns XML_SUCCESS (0) on success, XML_CAN_NOT_CONVERT_TEXT if the text cannot be converted
|
| 991 | to the requested type, and XML_NO_TEXT_NODE if there is no child text to query.
|
| 992 |
|
| 993 | */
|
| 994 | int QueryIntText( int* _value ) const;
|
| 995 | /// See QueryIntText()
|
| 996 | int QueryUnsignedText( unsigned* _value ) const;
|
| 997 | /// See QueryIntText()
|
| 998 | int QueryBoolText( bool* _value ) const;
|
| 999 | /// See QueryIntText()
|
| 1000 | int QueryDoubleText( double* _value ) const;
|
| 1001 | /// See QueryIntText()
|
| 1002 | int QueryFloatText( float* _value ) const;
|
| 1003 |
|
| 1004 | // internal:
|
| 1005 | enum {
|
| 1006 | OPEN, // <foo>
|
| 1007 | CLOSED, // <foo/>
|
| 1008 | CLOSING // </foo>
|
| 1009 | };
|
| 1010 | int ClosingType() const { return closingType; }
|
| 1011 | char* ParseDeep( char* p, StrPair* endTag );
|
| 1012 | virtual XMLNode* ShallowClone( XMLDocument* document ) const;
|
| 1013 | virtual bool ShallowEqual( const XMLNode* compare ) const;
|
| 1014 |
|
| 1015 | private:
|
| 1016 | XMLElement( XMLDocument* doc );
|
| 1017 | virtual ~XMLElement();
|
| 1018 | XMLElement( const XMLElement& ); // not supported
|
| 1019 | void operator=( const XMLElement& ); // not supported
|
| 1020 |
|
| 1021 | XMLAttribute* FindAttribute( const char* name );
|
| 1022 | XMLAttribute* FindOrCreateAttribute( const char* name );
|
| 1023 | //void LinkAttribute( XMLAttribute* attrib );
|
| 1024 | char* ParseAttributes( char* p );
|
| 1025 |
|
| 1026 | int closingType;
|
| 1027 | // The attribute list is ordered; there is no 'lastAttribute'
|
| 1028 | // because the list needs to be scanned for dupes before adding
|
| 1029 | // a new attribute.
|
| 1030 | XMLAttribute* rootAttribute;
|
| 1031 | };
|
| 1032 |
|
| 1033 |
|
| 1034 | /** A Document binds together all the functionality.
|
| 1035 | It can be saved, loaded, and printed to the screen.
|
| 1036 | All Nodes are connected and allocated to a Document.
|
| 1037 | If the Document is deleted, all its Nodes are also deleted.
|
| 1038 | */
|
| 1039 | class XMLDocument : public XMLNode
|
| 1040 | {
|
| 1041 | friend class XMLElement;
|
| 1042 | public:
|
| 1043 | /// constructor
|
| 1044 | XMLDocument( bool processEntities = true );
|
| 1045 | ~XMLDocument();
|
| 1046 |
|
| 1047 | virtual XMLDocument* ToDocument() { return this; }
|
| 1048 | virtual const XMLDocument* ToDocument() const { return this; }
|
| 1049 |
|
| 1050 | /**
|
| 1051 | Parse an XML file from a character string.
|
| 1052 | Returns XML_NO_ERROR (0) on success, or
|
| 1053 | an errorID.
|
| 1054 | */
|
| 1055 | int Parse( const char* xml );
|
| 1056 |
|
| 1057 | /**
|
| 1058 | Load an XML file from disk.
|
| 1059 | Returns XML_NO_ERROR (0) on success, or
|
| 1060 | an errorID.
|
| 1061 | */
|
| 1062 | int LoadFile( const char* filename );
|
| 1063 |
|
| 1064 | /**
|
| 1065 | Load an XML file from disk. You are responsible
|
| 1066 | for providing and closing the FILE*.
|
| 1067 |
|
| 1068 | Returns XML_NO_ERROR (0) on success, or
|
| 1069 | an errorID.
|
| 1070 | */
|
| 1071 | int LoadFile( FILE* );
|
| 1072 |
|
| 1073 | /**
|
| 1074 | Save the XML file to disk.
|
| 1075 | Returns XML_NO_ERROR (0) on success, or
|
| 1076 | an errorID.
|
| 1077 | */
|
| 1078 | int SaveFile( const char* filename );
|
| 1079 |
|
| 1080 | /**
|
| 1081 | Save the XML file to disk. You are responsible
|
| 1082 | for providing and closing the FILE*.
|
| 1083 |
|
| 1084 | Returns XML_NO_ERROR (0) on success, or
|
| 1085 | an errorID.
|
| 1086 | */
|
| 1087 | int SaveFile( FILE* );
|
| 1088 |
|
| 1089 | bool ProcessEntities() const { return processEntities; }
|
| 1090 |
|
| 1091 | /**
|
| 1092 | Returns true if this document has a leading Byte Order Mark of UTF8.
|
| 1093 | */
|
| 1094 | bool HasBOM() const { return writeBOM; }
|
| 1095 | /** Sets whether to write the BOM when writing the file.
|
| 1096 | */
|
| 1097 | void SetBOM( bool useBOM ) { writeBOM = useBOM; }
|
| 1098 |
|
| 1099 | /** Return the root element of DOM. Equivalent to FirstChildElement().
|
| 1100 | To get the first node, use FirstChild().
|
| 1101 | */
|
| 1102 | XMLElement* RootElement() { return FirstChildElement(); }
|
| 1103 | const XMLElement* RootElement() const { return FirstChildElement(); }
|
| 1104 |
|
| 1105 | /** Print the Document. If the Printer is not provided, it will
|
| 1106 | print to stdout. If you provide Printer, this can print to a file:
|
| 1107 | @verbatim
|
| 1108 | XMLPrinter printer( fp );
|
| 1109 | doc.Print( &printer );
|
| 1110 | @endverbatim
|
| 1111 |
|
| 1112 | Or you can use a printer to print to memory:
|
| 1113 | @verbatim
|
| 1114 | XMLPrinter printer;
|
| 1115 | doc->Print( &printer );
|
| 1116 | // printer.CStr() has a const char* to the XML
|
| 1117 | @endverbatim
|
| 1118 | */
|
| 1119 | void Print( XMLPrinter* streamer=0 );
|
| 1120 | virtual bool Accept( XMLVisitor* visitor ) const;
|
| 1121 |
|
| 1122 | /**
|
| 1123 | Create a new Element associated with
|
| 1124 | this Document. The memory for the Element
|
| 1125 | is managed by the Document.
|
| 1126 | */
|
| 1127 | XMLElement* NewElement( const char* name );
|
| 1128 | /**
|
| 1129 | Create a new Comment associated with
|
| 1130 | this Document. The memory for the Comment
|
| 1131 | is managed by the Document.
|
| 1132 | */
|
| 1133 | XMLComment* NewComment( const char* comment );
|
| 1134 | /**
|
| 1135 | Create a new Text associated with
|
| 1136 | this Document. The memory for the Text
|
| 1137 | is managed by the Document.
|
| 1138 | */
|
| 1139 | XMLText* NewText( const char* text );
|
| 1140 | /**
|
| 1141 | Create a new Declaration associated with
|
| 1142 | this Document. The memory for the object
|
| 1143 | is managed by the Document.
|
| 1144 |
|
| 1145 | If the 'text' param is null, the standard
|
| 1146 | declaration is used.:
|
| 1147 | @verbatim
|
| 1148 | <?xml version="1.0" encoding="UTF-8"?>
|
| 1149 | @endverbatim
|
| 1150 | */
|
| 1151 | XMLDeclaration* NewDeclaration( const char* text=0 );
|
| 1152 | /**
|
| 1153 | Create a new Unknown associated with
|
| 1154 | this Document. The memory for the object
|
| 1155 | is managed by the Document.
|
| 1156 | */
|
| 1157 | XMLUnknown* NewUnknown( const char* text );
|
| 1158 |
|
| 1159 | /**
|
| 1160 | Delete a node associated with this document.
|
| 1161 | It will be unlinked from the DOM.
|
| 1162 | */
|
| 1163 | void DeleteNode( XMLNode* node ) { node->parent->DeleteChild( node ); }
|
| 1164 |
|
| 1165 | void SetError( int error, const char* str1, const char* str2 );
|
| 1166 |
|
| 1167 | /// Return true if there was an error parsing the document.
|
| 1168 | bool Error() const { return errorID != XML_NO_ERROR; }
|
| 1169 | /// Return the errorID.
|
| 1170 | int ErrorID() const { return errorID; }
|
| 1171 | /// Return a possibly helpful diagnostic location or string.
|
| 1172 | const char* GetErrorStr1() const { return errorStr1; }
|
| 1173 | /// Return a possibly helpful secondary diagnostic location or string.
|
| 1174 | const char* GetErrorStr2() const { return errorStr2; }
|
| 1175 | /// If there is an error, print it to stdout.
|
| 1176 | void PrintError() const;
|
| 1177 |
|
| 1178 | // internal
|
| 1179 | char* Identify( char* p, XMLNode** node );
|
| 1180 |
|
| 1181 | virtual XMLNode* ShallowClone( XMLDocument* /*document*/ ) const { return 0; }
|
| 1182 | virtual bool ShallowEqual( const XMLNode* /*compare*/ ) const { return false; }
|
| 1183 |
|
| 1184 | private:
|
| 1185 | XMLDocument( const XMLDocument& ); // not supported
|
| 1186 | void operator=( const XMLDocument& ); // not supported
|
| 1187 | void InitDocument();
|
| 1188 |
|
| 1189 | bool writeBOM;
|
| 1190 | bool processEntities;
|
| 1191 | int errorID;
|
| 1192 | const char* errorStr1;
|
| 1193 | const char* errorStr2;
|
| 1194 | char* charBuffer;
|
| 1195 |
|
| 1196 | MemPoolT< sizeof(XMLElement) > elementPool;
|
| 1197 | MemPoolT< sizeof(XMLAttribute) > attributePool;
|
| 1198 | MemPoolT< sizeof(XMLText) > textPool;
|
| 1199 | MemPoolT< sizeof(XMLComment) > commentPool;
|
| 1200 | };
|
| 1201 |
|
| 1202 |
|
| 1203 | /**
|
| 1204 | A XMLHandle is a class that wraps a node pointer with null checks; this is
|
| 1205 | an incredibly useful thing. Note that XMLHandle is not part of the TinyXML
|
| 1206 | DOM structure. It is a separate utility class.
|
| 1207 |
|
| 1208 | Take an example:
|
| 1209 | @verbatim
|
| 1210 | <Document>
|
| 1211 | <Element attributeA = "valueA">
|
| 1212 | <Child attributeB = "value1" />
|
| 1213 | <Child attributeB = "value2" />
|
| 1214 | </Element>
|
| 1215 | </Document>
|
| 1216 | @endverbatim
|
| 1217 |
|
| 1218 | Assuming you want the value of "attributeB" in the 2nd "Child" element, it's very
|
| 1219 | easy to write a *lot* of code that looks like:
|
| 1220 |
|
| 1221 | @verbatim
|
| 1222 | XMLElement* root = document.FirstChildElement( "Document" );
|
| 1223 | if ( root )
|
| 1224 | {
|
| 1225 | XMLElement* element = root->FirstChildElement( "Element" );
|
| 1226 | if ( element )
|
| 1227 | {
|
| 1228 | XMLElement* child = element->FirstChildElement( "Child" );
|
| 1229 | if ( child )
|
| 1230 | {
|
| 1231 | XMLElement* child2 = child->NextSiblingElement( "Child" );
|
| 1232 | if ( child2 )
|
| 1233 | {
|
| 1234 | // Finally do something useful.
|
| 1235 | @endverbatim
|
| 1236 |
|
| 1237 | And that doesn't even cover "else" cases. XMLHandle addresses the verbosity
|
| 1238 | of such code. A XMLHandle checks for null pointers so it is perfectly safe
|
| 1239 | and correct to use:
|
| 1240 |
|
| 1241 | @verbatim
|
| 1242 | XMLHandle docHandle( &document );
|
| 1243 | XMLElement* child2 = docHandle.FirstChild( "Document" ).FirstChild( "Element" ).FirstChild().NextSibling().ToElement();
|
| 1244 | if ( child2 )
|
| 1245 | {
|
| 1246 | // do something useful
|
| 1247 | @endverbatim
|
| 1248 |
|
| 1249 | Which is MUCH more concise and useful.
|
| 1250 |
|
| 1251 | It is also safe to copy handles - internally they are nothing more than node pointers.
|
| 1252 | @verbatim
|
| 1253 | XMLHandle handleCopy = handle;
|
| 1254 | @endverbatim
|
| 1255 |
|
| 1256 | See also XMLConstHandle, which is the same as XMLHandle, but operates on const objects.
|
| 1257 | */
|
| 1258 | class XMLHandle
|
| 1259 | {
|
| 1260 | public:
|
| 1261 | /// Create a handle from any node (at any depth of the tree.) This can be a null pointer.
|
| 1262 | XMLHandle( XMLNode* _node ) { node = _node; }
|
| 1263 | /// Create a handle from a node.
|
| 1264 | XMLHandle( XMLNode& _node ) { node = &_node; }
|
| 1265 | /// Copy constructor
|
| 1266 | XMLHandle( const XMLHandle& ref ) { node = ref.node; }
|
| 1267 | /// Assignment
|
| 1268 | XMLHandle& operator=( const XMLHandle& ref ) { node = ref.node; return *this; }
|
| 1269 |
|
| 1270 | /// Get the first child of this handle.
|
| 1271 | XMLHandle FirstChild() { return XMLHandle( node ? node->FirstChild() : 0 ); }
|
| 1272 | /// Get the first child element of this handle.
|
| 1273 | XMLHandle FirstChildElement( const char* value=0 ) { return XMLHandle( node ? node->FirstChildElement( value ) : 0 ); }
|
| 1274 | /// Get the last child of this handle.
|
| 1275 | XMLHandle LastChild() { return XMLHandle( node ? node->LastChild() : 0 ); }
|
| 1276 | /// Get the last child element of this handle.
|
| 1277 | XMLHandle LastChildElement( const char* _value=0 ) { return XMLHandle( node ? node->LastChildElement( _value ) : 0 ); }
|
| 1278 | /// Get the previous sibling of this handle.
|
| 1279 | XMLHandle PreviousSibling() { return XMLHandle( node ? node->PreviousSibling() : 0 ); }
|
| 1280 | /// Get the previous sibling element of this handle.
|
| 1281 | XMLHandle PreviousSiblingElement( const char* _value=0 ) { return XMLHandle( node ? node->PreviousSiblingElement( _value ) : 0 ); }
|
| 1282 | /// Get the next sibling of this handle.
|
| 1283 | XMLHandle NextSibling() { return XMLHandle( node ? node->NextSibling() : 0 ); }
|
| 1284 | /// Get the next sibling element of this handle.
|
| 1285 | XMLHandle NextSiblingElement( const char* _value=0 ) { return XMLHandle( node ? node->NextSiblingElement( _value ) : 0 ); }
|
| 1286 |
|
| 1287 | /// Safe cast to XMLNode. This can return null.
|
| 1288 | XMLNode* ToNode() { return node; }
|
| 1289 | /// Safe cast to XMLElement. This can return null.
|
| 1290 | XMLElement* ToElement() { return ( ( node && node->ToElement() ) ? node->ToElement() : 0 ); }
|
| 1291 | /// Safe cast to XMLText. This can return null.
|
| 1292 | XMLText* ToText() { return ( ( node && node->ToText() ) ? node->ToText() : 0 ); }
|
| 1293 | /// Safe cast to XMLUnknown. This can return null.
|
| 1294 | XMLUnknown* ToUnknown() { return ( ( node && node->ToUnknown() ) ? node->ToUnknown() : 0 ); }
|
| 1295 | /// Safe cast to XMLDeclaration. This can return null.
|
| 1296 | XMLDeclaration* ToDeclaration() { return ( ( node && node->ToDeclaration() ) ? node->ToDeclaration() : 0 ); }
|
| 1297 |
|
| 1298 | private:
|
| 1299 | XMLNode* node;
|
| 1300 | };
|
| 1301 |
|
| 1302 |
|
| 1303 | /**
|
| 1304 | A variant of the XMLHandle class for working with const XMLNodes and Documents. It is the
|
| 1305 | same in all regards, except for the 'const' qualifiers. See XMLHandle for API.
|
| 1306 | */
|
| 1307 | class XMLConstHandle
|
| 1308 | {
|
| 1309 | public:
|
| 1310 | XMLConstHandle( const XMLNode* _node ) { node = _node; }
|
| 1311 | XMLConstHandle( const XMLNode& _node ) { node = &_node; }
|
| 1312 | XMLConstHandle( const XMLConstHandle& ref ) { node = ref.node; }
|
| 1313 |
|
| 1314 | XMLConstHandle& operator=( const XMLConstHandle& ref ) { node = ref.node; return *this; }
|
| 1315 |
|
| 1316 | const XMLConstHandle FirstChild() const { return XMLConstHandle( node ? node->FirstChild() : 0 ); }
|
| 1317 | const XMLConstHandle FirstChildElement( const char* value=0 ) const { return XMLConstHandle( node ? node->FirstChildElement( value ) : 0 ); }
|
| 1318 | const XMLConstHandle LastChild() const { return XMLConstHandle( node ? node->LastChild() : 0 ); }
|
| 1319 | const XMLConstHandle LastChildElement( const char* _value=0 ) const { return XMLConstHandle( node ? node->LastChildElement( _value ) : 0 ); }
|
| 1320 | const XMLConstHandle PreviousSibling() const { return XMLConstHandle( node ? node->PreviousSibling() : 0 ); }
|
| 1321 | const XMLConstHandle PreviousSiblingElement( const char* _value=0 ) const { return XMLConstHandle( node ? node->PreviousSiblingElement( _value ) : 0 ); }
|
| 1322 | const XMLConstHandle NextSibling() const { return XMLConstHandle( node ? node->NextSibling() : 0 ); }
|
| 1323 | const XMLConstHandle NextSiblingElement( const char* _value=0 ) const { return XMLConstHandle( node ? node->NextSiblingElement( _value ) : 0 ); }
|
| 1324 |
|
| 1325 |
|
| 1326 | const XMLNode* ToNode() const { return node; }
|
| 1327 | const XMLElement* ToElement() const { return ( ( node && node->ToElement() ) ? node->ToElement() : 0 ); }
|
| 1328 | const XMLText* ToText() const { return ( ( node && node->ToText() ) ? node->ToText() : 0 ); }
|
| 1329 | const XMLUnknown* ToUnknown() const { return ( ( node && node->ToUnknown() ) ? node->ToUnknown() : 0 ); }
|
| 1330 | const XMLDeclaration* ToDeclaration() const { return ( ( node && node->ToDeclaration() ) ? node->ToDeclaration() : 0 ); }
|
| 1331 |
|
| 1332 | private:
|
| 1333 | const XMLNode* node;
|
| 1334 | };
|
| 1335 |
|
| 1336 |
|
| 1337 | /**
|
| 1338 | Printing functionality. The XMLPrinter gives you more
|
| 1339 | options than the XMLDocument::Print() method.
|
| 1340 |
|
| 1341 | It can:
|
| 1342 | -# Print to memory.
|
| 1343 | -# Print to a file you provide.
|
| 1344 | -# Print XML without a XMLDocument.
|
| 1345 |
|
| 1346 | Print to Memory
|
| 1347 |
|
| 1348 | @verbatim
|
| 1349 | XMLPrinter printer;
|
| 1350 | doc->Print( &printer );
|
| 1351 | SomeFunction( printer.CStr() );
|
| 1352 | @endverbatim
|
| 1353 |
|
| 1354 | Print to a File
|
| 1355 |
|
| 1356 | You provide the file pointer.
|
| 1357 | @verbatim
|
| 1358 | XMLPrinter printer( fp );
|
| 1359 | doc.Print( &printer );
|
| 1360 | @endverbatim
|
| 1361 |
|
| 1362 | Print without a XMLDocument
|
| 1363 |
|
| 1364 | When loading, an XML parser is very useful. However, sometimes
|
| 1365 | when saving, it just gets in the way. The code is often set up
|
| 1366 | for streaming, and constructing the DOM is just overhead.
|
| 1367 |
|
| 1368 | The Printer supports the streaming case. The following code
|
| 1369 | prints out a trivially simple XML file without ever creating
|
| 1370 | an XML document.
|
| 1371 |
|
| 1372 | @verbatim
|
| 1373 | XMLPrinter printer( fp );
|
| 1374 | printer.OpenElement( "foo" );
|
| 1375 | printer.PushAttribute( "foo", "bar" );
|
| 1376 | printer.CloseElement();
|
| 1377 | @endverbatim
|
| 1378 | */
|
| 1379 | class XMLPrinter : public XMLVisitor
|
| 1380 | {
|
| 1381 | public:
|
| 1382 | /** Construct the printer. If the FILE* is specified,
|
| 1383 | this will print to the FILE. Else it will print
|
| 1384 | to memory, and the result is available in CStr().
|
| 1385 | If 'compact' is set to true, then output is created
|
| 1386 | with only required whitespace and newlines.
|
| 1387 | */
|
| 1388 | XMLPrinter( FILE* file=0, bool compact = false );
|
| 1389 | ~XMLPrinter() {}
|
| 1390 |
|
| 1391 | /** If streaming, write the BOM and declaration. */
|
| 1392 | void PushHeader( bool writeBOM, bool writeDeclaration );
|
| 1393 | /** If streaming, start writing an element.
|
| 1394 | The element must be closed with CloseElement()
|
| 1395 | */
|
| 1396 | void OpenElement( const char* name );
|
| 1397 | /// If streaming, add an attribute to an open element.
|
| 1398 | void PushAttribute( const char* name, const char* value );
|
| 1399 | void PushAttribute( const char* name, int value );
|
| 1400 | void PushAttribute( const char* name, unsigned value );
|
| 1401 | void PushAttribute( const char* name, bool value );
|
| 1402 | void PushAttribute( const char* name, double value );
|
| 1403 | /// If streaming, close the Element.
|
| 1404 | void CloseElement();
|
| 1405 |
|
| 1406 | /// Add a text node.
|
| 1407 | void PushText( const char* text, bool cdata=false );
|
| 1408 | /// Add a text node from an integer.
|
| 1409 | void PushText( int value );
|
| 1410 | /// Add a text node from an unsigned.
|
| 1411 | void PushText( unsigned value );
|
| 1412 | /// Add a text node from a bool.
|
| 1413 | void PushText( bool value );
|
| 1414 | /// Add a text node from a float.
|
| 1415 | void PushText( float value );
|
| 1416 | /// Add a text node from a double.
|
| 1417 | void PushText( double value );
|
| 1418 |
|
| 1419 | /// Add a comment
|
| 1420 | void PushComment( const char* comment );
|
| 1421 |
|
| 1422 | void PushDeclaration( const char* value );
|
| 1423 | void PushUnknown( const char* value );
|
| 1424 |
|
| 1425 | virtual bool VisitEnter( const XMLDocument& /*doc*/ );
|
| 1426 | virtual bool VisitExit( const XMLDocument& /*doc*/ ) { return true; }
|
| 1427 |
|
| 1428 | virtual bool VisitEnter( const XMLElement& element, const XMLAttribute* attribute );
|
| 1429 | virtual bool VisitExit( const XMLElement& element );
|
| 1430 |
|
| 1431 | virtual bool Visit( const XMLText& text );
|
| 1432 | virtual bool Visit( const XMLComment& comment );
|
| 1433 | virtual bool Visit( const XMLDeclaration& declaration );
|
| 1434 | virtual bool Visit( const XMLUnknown& unknown );
|
| 1435 |
|
| 1436 | /**
|
| 1437 | If in print to memory mode, return a pointer to
|
| 1438 | the XML file in memory.
|
| 1439 | */
|
| 1440 | const char* CStr() const { return buffer.Mem(); }
|
| 1441 | /**
|
| 1442 | If in print to memory mode, return the size
|
| 1443 | of the XML file in memory. (Note the size returned
|
| 1444 | includes the terminating null.)
|
| 1445 | */
|
| 1446 | int CStrSize() const { return buffer.Size(); }
|
| 1447 |
|
| 1448 | private:
|
| 1449 | void SealElement();
|
| 1450 | void PrintSpace( int depth );
|
| 1451 | void PrintString( const char*, bool restrictedEntitySet ); // prints out, after detecting entities.
|
| 1452 | void Print( const char* format, ... );
|
| 1453 |
|
| 1454 | bool elementJustOpened;
|
| 1455 | bool firstElement;
|
| 1456 | FILE* fp;
|
| 1457 | int depth;
|
| 1458 | int textDepth;
|
| 1459 | bool processEntities;
|
| 1460 | bool compactMode;
|
| 1461 |
|
| 1462 | enum {
|
| 1463 | ENTITY_RANGE = 64,
|
| 1464 | BUF_SIZE = 200
|
| 1465 | };
|
| 1466 | bool entityFlag[ENTITY_RANGE];
|
| 1467 | bool restrictedEntityFlag[ENTITY_RANGE];
|
| 1468 |
|
| 1469 | DynArray< const char*, 10 > stack;
|
| 1470 | DynArray< char, 20 > buffer;
|
| 1471 | #ifdef _MSC_VER
|
| 1472 | DynArray< char, 20 > accumulator;
|
| 1473 | #endif
|
| 1474 | };
|
| 1475 |
|
| 1476 |
|
| 1477 | } // tinyxml2
|
| 1478 |
|
| 1479 |
|
| 1480 | #endif // TINYXML2_INCLUDED
|