264 lines
7.4 KiB
C++
264 lines
7.4 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2012, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the
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following conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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----------------------------------------------------------------------
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*/
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/** @file ObjTools.h
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* @brief Some helpful templates for text parsing
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*/
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#ifndef OBJ_TOOLS_H_INC
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#define OBJ_TOOLS_H_INC
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#include "fast_atof.h"
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namespace Assimp
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{
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/** @brief Returns true, if the last entry of the buffer is reached.
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* @param it Iterator of current position.
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* @param end Iterator with end of buffer.
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* @return true, if the end of the buffer is reached.
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*/
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template<class char_t>
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inline bool isEndOfBuffer( char_t it, char_t end )
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{
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if ( it == end )
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{
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return true;
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}
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else
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{
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end--;
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}
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return ( it == end );
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}
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/** @brief Returns true, if token is a space on any supported platform
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* @param token Token to search in
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* @return true, if token is a space
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*/
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inline bool isSeparator( char token )
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{
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return ( token == ' ' ||
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token == '\n' ||
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token == '\f' ||
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token == '\r' ||
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token == '\t' );
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}
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/** @brief Returns true, fi token id a new line marking token.
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* @param token Token to search in
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* @return true, if token is a newline token.
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*/
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inline bool isNewLine( char token )
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{
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return ( token == '\n' || token == '\f' || token == '\r' );
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}
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/** @brief Returns next word separated by a space
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* @param pBuffer Pointer to data buffer
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* @param pEnd Pointer to end of buffer
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* @return Pointer to next space
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*/
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template<class Char_T>
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inline Char_T getNextWord( Char_T pBuffer, Char_T pEnd )
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{
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while ( !isEndOfBuffer( pBuffer, pEnd ) )
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{
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if ( !isSeparator( *pBuffer ) || isNewLine( *pBuffer ) )
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break;
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pBuffer++;
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}
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return pBuffer;
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}
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/** @brief Returns ponter a next token
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* @param pBuffer Pointer to data buffer
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* @param pEnd Pointer to end of buffer
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* @return Pointer to next token
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*/
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template<class Char_T>
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inline Char_T getNextToken( Char_T pBuffer, Char_T pEnd )
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{
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while ( !isEndOfBuffer( pBuffer, pEnd ) )
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{
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if ( isSeparator( *pBuffer ) )
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break;
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pBuffer++;
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}
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return getNextWord( pBuffer, pEnd );
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}
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/** @brief Skips a line
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* @param it Iterator set to current position
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* @param end Iterator set to end of scratch buffer for readout
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* @param uiLine Current linenumber in format
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* @return Current-iterator with new position
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*/
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template<class char_t>
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inline char_t skipLine( char_t it, char_t end, unsigned int &uiLine )
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{
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while ( !isEndOfBuffer( it, end ) && !isNewLine( *it ) )
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++it;
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if ( it != end )
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{
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++it;
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++uiLine;
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}
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// fix .. from time to time there are spaces at the beginning of a material line
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while ( it != end && (*it == '\t' || *it == ' ') )
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++it;
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return it;
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}
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/** @brief Get a name from the current line. Preserve space in the middle,
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* but trim it at the end.
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* @param it set to current position
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* @param end set to end of scratch buffer for readout
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* @param name Separated name
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* @return Current-iterator with new position
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*/
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template<class char_t>
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inline char_t getName( char_t it, char_t end, std::string &name )
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{
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name = "";
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it = getNextToken<char_t>( it, end );
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if ( isEndOfBuffer( it, end ) )
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return end;
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char *pStart = &( *it );
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while ( !isEndOfBuffer( it, end ) && !isNewLine( *it ) ) {
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++it;
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}
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while(isEndOfBuffer( it, end ) || isNewLine( *it ) || isSeparator(*it)) {
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--it;
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}
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++it;
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// Get name
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// if there is no name, and the previous char is a separator, come back to start
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while (&(*it) < pStart) {
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++it;
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}
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std::string strName( pStart, &(*it) );
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if ( strName.empty() )
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return it;
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else
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name = strName;
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return it;
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}
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/** @brief Get next word from given line
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* @param it set to current position
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* @param end set to end of scratch buffer for readout
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* @param pBuffer Buffer for next word
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* @param length Buffer length
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* @return Current-iterator with new position
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*/
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template<class char_t>
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inline char_t CopyNextWord( char_t it, char_t end, char *pBuffer, size_t length )
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{
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size_t index = 0;
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it = getNextWord<char_t>( it, end );
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while ( !isSeparator( *it ) && !isEndOfBuffer( it, end ) )
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{
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pBuffer[index] = *it ;
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index++;
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if (index == length-1)
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break;
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++it;
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}
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pBuffer[ index ] = '\0';
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return it;
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}
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/** @brief Get next float from given line
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* @param it set to current position
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* @param end set to end of scratch buffer for readout
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* @param value Separated float value.
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* @return Current-iterator with new position
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*/
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template<class char_t>
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inline char_t getFloat( char_t it, char_t end, float &value )
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{
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static const size_t BUFFERSIZE = 1024;
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char buffer[ BUFFERSIZE ];
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it = CopyNextWord<char_t>( it, end, buffer, BUFFERSIZE );
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value = (float) fast_atof( buffer );
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return it;
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}
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/** @brief Will perform a simple tokenize.
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* @param str String to tokenize.
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* @param tokens Array with tokens, will be empty if no token was found.
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* @param delimiters Delimiter for tokenize.
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* @return Number of found token.
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*/
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template<class string_type>
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unsigned int tokenize( const string_type& str, std::vector<string_type>& tokens,
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const string_type& delimiters )
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{
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// Skip delimiters at beginning.
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typename string_type::size_type lastPos = str.find_first_not_of( delimiters, 0 );
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// Find first "non-delimiter".
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typename string_type::size_type pos = str.find_first_of( delimiters, lastPos );
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while ( string_type::npos != pos || string_type::npos != lastPos )
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{
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// Found a token, add it to the vector.
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string_type tmp = str.substr(lastPos, pos - lastPos);
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if ( !tmp.empty() && ' ' != tmp[ 0 ] )
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tokens.push_back( tmp );
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// Skip delimiters. Note the "not_of"
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lastPos = str.find_first_not_of( delimiters, pos );
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// Find next "non-delimiter"
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pos = str.find_first_of( delimiters, lastPos );
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}
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return static_cast<unsigned int>( tokens.size() );
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}
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} // Namespace Assimp
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#endif
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