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annotate libs/assimp/ObjTools.h @ 0:b2f14e535253

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author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 01 Feb 2014 19:58:19 +0200
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nuclear@0 1 /*
nuclear@0 2 Open Asset Import Library (assimp)
nuclear@0 3 ----------------------------------------------------------------------
nuclear@0 4
nuclear@0 5 Copyright (c) 2006-2012, assimp team
nuclear@0 6 All rights reserved.
nuclear@0 7
nuclear@0 8 Redistribution and use of this software in source and binary forms,
nuclear@0 9 with or without modification, are permitted provided that the
nuclear@0 10 following conditions are met:
nuclear@0 11
nuclear@0 12 * Redistributions of source code must retain the above
nuclear@0 13 copyright notice, this list of conditions and the
nuclear@0 14 following disclaimer.
nuclear@0 15
nuclear@0 16 * Redistributions in binary form must reproduce the above
nuclear@0 17 copyright notice, this list of conditions and the
nuclear@0 18 following disclaimer in the documentation and/or other
nuclear@0 19 materials provided with the distribution.
nuclear@0 20
nuclear@0 21 * Neither the name of the assimp team, nor the names of its
nuclear@0 22 contributors may be used to endorse or promote products
nuclear@0 23 derived from this software without specific prior
nuclear@0 24 written permission of the assimp team.
nuclear@0 25
nuclear@0 26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
nuclear@0 27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
nuclear@0 28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
nuclear@0 29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
nuclear@0 30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
nuclear@0 31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
nuclear@0 32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
nuclear@0 33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
nuclear@0 34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
nuclear@0 35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
nuclear@0 36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
nuclear@0 37
nuclear@0 38 ----------------------------------------------------------------------
nuclear@0 39 */
nuclear@0 40
nuclear@0 41 /** @file ObjTools.h
nuclear@0 42 * @brief Some helpful templates for text parsing
nuclear@0 43 */
nuclear@0 44 #ifndef OBJ_TOOLS_H_INC
nuclear@0 45 #define OBJ_TOOLS_H_INC
nuclear@0 46
nuclear@0 47 #include "fast_atof.h"
nuclear@0 48
nuclear@0 49 namespace Assimp
nuclear@0 50 {
nuclear@0 51
nuclear@0 52 /** @brief Returns true, if the last entry of the buffer is reached.
nuclear@0 53 * @param it Iterator of current position.
nuclear@0 54 * @param end Iterator with end of buffer.
nuclear@0 55 * @return true, if the end of the buffer is reached.
nuclear@0 56 */
nuclear@0 57 template<class char_t>
nuclear@0 58 inline bool isEndOfBuffer( char_t it, char_t end )
nuclear@0 59 {
nuclear@0 60 if ( it == end )
nuclear@0 61 {
nuclear@0 62 return true;
nuclear@0 63 }
nuclear@0 64 else
nuclear@0 65 {
nuclear@0 66 end--;
nuclear@0 67 }
nuclear@0 68 return ( it == end );
nuclear@0 69 }
nuclear@0 70
nuclear@0 71 /** @brief Returns true, if token is a space on any supported platform
nuclear@0 72 * @param token Token to search in
nuclear@0 73 * @return true, if token is a space
nuclear@0 74 */
nuclear@0 75 inline bool isSeparator( char token )
nuclear@0 76 {
nuclear@0 77 return ( token == ' ' ||
nuclear@0 78 token == '\n' ||
nuclear@0 79 token == '\f' ||
nuclear@0 80 token == '\r' ||
nuclear@0 81 token == '\t' );
nuclear@0 82 }
nuclear@0 83
nuclear@0 84 /** @brief Returns true, fi token id a new line marking token.
nuclear@0 85 * @param token Token to search in
nuclear@0 86 * @return true, if token is a newline token.
nuclear@0 87 */
nuclear@0 88 inline bool isNewLine( char token )
nuclear@0 89 {
nuclear@0 90 return ( token == '\n' || token == '\f' || token == '\r' );
nuclear@0 91 }
nuclear@0 92
nuclear@0 93 /** @brief Returns next word separated by a space
nuclear@0 94 * @param pBuffer Pointer to data buffer
nuclear@0 95 * @param pEnd Pointer to end of buffer
nuclear@0 96 * @return Pointer to next space
nuclear@0 97 */
nuclear@0 98 template<class Char_T>
nuclear@0 99 inline Char_T getNextWord( Char_T pBuffer, Char_T pEnd )
nuclear@0 100 {
nuclear@0 101 while ( !isEndOfBuffer( pBuffer, pEnd ) )
nuclear@0 102 {
nuclear@0 103 if ( !isSeparator( *pBuffer ) || isNewLine( *pBuffer ) )
nuclear@0 104 break;
nuclear@0 105 pBuffer++;
nuclear@0 106 }
nuclear@0 107 return pBuffer;
nuclear@0 108 }
nuclear@0 109
nuclear@0 110 /** @brief Returns ponter a next token
nuclear@0 111 * @param pBuffer Pointer to data buffer
nuclear@0 112 * @param pEnd Pointer to end of buffer
nuclear@0 113 * @return Pointer to next token
nuclear@0 114 */
nuclear@0 115 template<class Char_T>
nuclear@0 116 inline Char_T getNextToken( Char_T pBuffer, Char_T pEnd )
nuclear@0 117 {
nuclear@0 118 while ( !isEndOfBuffer( pBuffer, pEnd ) )
nuclear@0 119 {
nuclear@0 120 if ( isSeparator( *pBuffer ) )
nuclear@0 121 break;
nuclear@0 122 pBuffer++;
nuclear@0 123 }
nuclear@0 124 return getNextWord( pBuffer, pEnd );
nuclear@0 125 }
nuclear@0 126
nuclear@0 127 /** @brief Skips a line
nuclear@0 128 * @param it Iterator set to current position
nuclear@0 129 * @param end Iterator set to end of scratch buffer for readout
nuclear@0 130 * @param uiLine Current linenumber in format
nuclear@0 131 * @return Current-iterator with new position
nuclear@0 132 */
nuclear@0 133 template<class char_t>
nuclear@0 134 inline char_t skipLine( char_t it, char_t end, unsigned int &uiLine )
nuclear@0 135 {
nuclear@0 136 while ( !isEndOfBuffer( it, end ) && !isNewLine( *it ) )
nuclear@0 137 ++it;
nuclear@0 138 if ( it != end )
nuclear@0 139 {
nuclear@0 140 ++it;
nuclear@0 141 ++uiLine;
nuclear@0 142 }
nuclear@0 143 // fix .. from time to time there are spaces at the beginning of a material line
nuclear@0 144 while ( it != end && (*it == '\t' || *it == ' ') )
nuclear@0 145 ++it;
nuclear@0 146 return it;
nuclear@0 147 }
nuclear@0 148
nuclear@0 149 /** @brief Get a name from the current line. Preserve space in the middle,
nuclear@0 150 * but trim it at the end.
nuclear@0 151 * @param it set to current position
nuclear@0 152 * @param end set to end of scratch buffer for readout
nuclear@0 153 * @param name Separated name
nuclear@0 154 * @return Current-iterator with new position
nuclear@0 155 */
nuclear@0 156 template<class char_t>
nuclear@0 157 inline char_t getName( char_t it, char_t end, std::string &name )
nuclear@0 158 {
nuclear@0 159 name = "";
nuclear@0 160 it = getNextToken<char_t>( it, end );
nuclear@0 161 if ( isEndOfBuffer( it, end ) )
nuclear@0 162 return end;
nuclear@0 163
nuclear@0 164 char *pStart = &( *it );
nuclear@0 165 while ( !isEndOfBuffer( it, end ) && !isNewLine( *it ) ) {
nuclear@0 166 ++it;
nuclear@0 167 }
nuclear@0 168
nuclear@0 169 while(isEndOfBuffer( it, end ) || isNewLine( *it ) || isSeparator(*it)) {
nuclear@0 170 --it;
nuclear@0 171 }
nuclear@0 172 ++it;
nuclear@0 173
nuclear@0 174 // Get name
nuclear@0 175 // if there is no name, and the previous char is a separator, come back to start
nuclear@0 176 while (&(*it) < pStart) {
nuclear@0 177 ++it;
nuclear@0 178 }
nuclear@0 179 std::string strName( pStart, &(*it) );
nuclear@0 180 if ( strName.empty() )
nuclear@0 181 return it;
nuclear@0 182 else
nuclear@0 183 name = strName;
nuclear@0 184
nuclear@0 185 return it;
nuclear@0 186 }
nuclear@0 187
nuclear@0 188 /** @brief Get next word from given line
nuclear@0 189 * @param it set to current position
nuclear@0 190 * @param end set to end of scratch buffer for readout
nuclear@0 191 * @param pBuffer Buffer for next word
nuclear@0 192 * @param length Buffer length
nuclear@0 193 * @return Current-iterator with new position
nuclear@0 194 */
nuclear@0 195 template<class char_t>
nuclear@0 196 inline char_t CopyNextWord( char_t it, char_t end, char *pBuffer, size_t length )
nuclear@0 197 {
nuclear@0 198 size_t index = 0;
nuclear@0 199 it = getNextWord<char_t>( it, end );
nuclear@0 200 while ( !isSeparator( *it ) && !isEndOfBuffer( it, end ) )
nuclear@0 201 {
nuclear@0 202 pBuffer[index] = *it ;
nuclear@0 203 index++;
nuclear@0 204 if (index == length-1)
nuclear@0 205 break;
nuclear@0 206 ++it;
nuclear@0 207 }
nuclear@0 208 pBuffer[ index ] = '\0';
nuclear@0 209 return it;
nuclear@0 210 }
nuclear@0 211
nuclear@0 212 /** @brief Get next float from given line
nuclear@0 213 * @param it set to current position
nuclear@0 214 * @param end set to end of scratch buffer for readout
nuclear@0 215 * @param value Separated float value.
nuclear@0 216 * @return Current-iterator with new position
nuclear@0 217 */
nuclear@0 218 template<class char_t>
nuclear@0 219 inline char_t getFloat( char_t it, char_t end, float &value )
nuclear@0 220 {
nuclear@0 221 static const size_t BUFFERSIZE = 1024;
nuclear@0 222 char buffer[ BUFFERSIZE ];
nuclear@0 223 it = CopyNextWord<char_t>( it, end, buffer, BUFFERSIZE );
nuclear@0 224 value = (float) fast_atof( buffer );
nuclear@0 225
nuclear@0 226 return it;
nuclear@0 227 }
nuclear@0 228
nuclear@0 229 /** @brief Will perform a simple tokenize.
nuclear@0 230 * @param str String to tokenize.
nuclear@0 231 * @param tokens Array with tokens, will be empty if no token was found.
nuclear@0 232 * @param delimiters Delimiter for tokenize.
nuclear@0 233 * @return Number of found token.
nuclear@0 234 */
nuclear@0 235 template<class string_type>
nuclear@0 236 unsigned int tokenize( const string_type& str, std::vector<string_type>& tokens,
nuclear@0 237 const string_type& delimiters )
nuclear@0 238 {
nuclear@0 239 // Skip delimiters at beginning.
nuclear@0 240 typename string_type::size_type lastPos = str.find_first_not_of( delimiters, 0 );
nuclear@0 241
nuclear@0 242 // Find first "non-delimiter".
nuclear@0 243 typename string_type::size_type pos = str.find_first_of( delimiters, lastPos );
nuclear@0 244 while ( string_type::npos != pos || string_type::npos != lastPos )
nuclear@0 245 {
nuclear@0 246 // Found a token, add it to the vector.
nuclear@0 247 string_type tmp = str.substr(lastPos, pos - lastPos);
nuclear@0 248 if ( !tmp.empty() && ' ' != tmp[ 0 ] )
nuclear@0 249 tokens.push_back( tmp );
nuclear@0 250
nuclear@0 251 // Skip delimiters. Note the "not_of"
nuclear@0 252 lastPos = str.find_first_not_of( delimiters, pos );
nuclear@0 253
nuclear@0 254 // Find next "non-delimiter"
nuclear@0 255 pos = str.find_first_of( delimiters, lastPos );
nuclear@0 256 }
nuclear@0 257
nuclear@0 258 return static_cast<unsigned int>( tokens.size() );
nuclear@0 259 }
nuclear@0 260
nuclear@0 261 } // Namespace Assimp
nuclear@0 262
nuclear@0 263 #endif