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assimp/code/ObjTools.h

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/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------
Copyright (c) 2006-2016, assimp team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the
following conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.
* Neither the name of the assimp team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the assimp team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
----------------------------------------------------------------------
*/
/** @file ObjTools.h
* @brief Some helpful templates for text parsing
*/
#ifndef OBJ_TOOLS_H_INC
#define OBJ_TOOLS_H_INC
#include "fast_atof.h"
#include "ParsingUtils.h"
#include <vector>
namespace Assimp
{
/** @brief Returns true, if the last entry of the buffer is reached.
* @param it Iterator of current position.
* @param end Iterator with end of buffer.
* @return true, if the end of the buffer is reached.
*/
template<class char_t>
inline bool isEndOfBuffer( char_t it, char_t end )
{
if ( it == end )
{
return true;
}
else
{
end--;
}
return ( it == end );
}
/** @brief Returns next word separated by a space
* @param pBuffer Pointer to data buffer
* @param pEnd Pointer to end of buffer
* @return Pointer to next space
*/
template<class Char_T>
inline Char_T getNextWord( Char_T pBuffer, Char_T pEnd )
{
while ( !isEndOfBuffer( pBuffer, pEnd ) )
{
if( !IsSpaceOrNewLine( *pBuffer ) || IsLineEnd( *pBuffer ) )
break;
pBuffer++;
}
return pBuffer;
}
/** @brief Returns pointer a next token
* @param pBuffer Pointer to data buffer
* @param pEnd Pointer to end of buffer
* @return Pointer to next token
*/
template<class Char_T>
inline Char_T getNextToken( Char_T pBuffer, Char_T pEnd )
{
while ( !isEndOfBuffer( pBuffer, pEnd ) )
{
if( IsSpaceOrNewLine( *pBuffer ) )
break;
pBuffer++;
}
return getNextWord( pBuffer, pEnd );
}
/** @brief Skips a line
* @param it Iterator set to current position
* @param end Iterator set to end of scratch buffer for readout
* @param uiLine Current line number in format
* @return Current-iterator with new position
*/
template<class char_t>
inline char_t skipLine( char_t it, char_t end, unsigned int &uiLine ) {
while( !isEndOfBuffer( it, end ) && !IsLineEnd( *it ) ) {
++it;
}
if ( it != end )
{
++it;
++uiLine;
}
// fix .. from time to time there are spaces at the beginning of a material line
while ( it != end && (*it == '\t' || *it == ' ') )
++it;
return it;
}
/** @brief Get a name from the current line. Preserve space in the middle,
* but trim it at the end.
* @param it set to current position
* @param end set to end of scratch buffer for readout
* @param name Separated name
* @return Current-iterator with new position
*/
template<class char_t>
inline char_t getName( char_t it, char_t end, std::string &name )
{
name = "";
if( isEndOfBuffer( it, end ) ) {
return end;
}
char *pStart = &( *it );
while( !isEndOfBuffer( it, end ) && !IsLineEnd( *it ) && !IsSpaceOrNewLine( *it ) ) {
++it;
}
/*while( isEndOfBuffer( it, end ) || IsLineEnd( *it ) || IsSpaceOrNewLine( *it ) ) {
--it;
}
++it;
*/
// Get name
// if there is no name, and the previous char is a separator, come back to start
while (&(*it) < pStart) {
++it;
}
std::string strName( pStart, &(*it) );
if ( strName.empty() )
return it;
else
name = strName;
return it;
}
/** @brief Get a name from the current line. Do not preserve space
* in the middle, but trim it at the end.
* @param it set to current position
* @param end set to end of scratch buffer for readout
* @param name Separated name
* @return Current-iterator with new position
*/
template<class char_t>
inline char_t getNameNoSpace( char_t it, char_t end, std::string &name )
{
name = "";
if( isEndOfBuffer( it, end ) ) {
return end;
}
char *pStart = &( *it );
while( !isEndOfBuffer( it, end ) && !IsLineEnd( *it )
&& !IsSpaceOrNewLine( *it ) ) {
++it;
}
while( isEndOfBuffer( it, end ) || IsLineEnd( *it )
|| IsSpaceOrNewLine( *it ) ) {
--it;
}
++it;
// Get name
// if there is no name, and the previous char is a separator, come back to start
while (&(*it) < pStart) {
++it;
}
std::string strName( pStart, &(*it) );
if ( strName.empty() )
return it;
else
name = strName;
return it;
}
/** @brief Get next word from given line
* @param it set to current position
* @param end set to end of scratch buffer for readout
* @param pBuffer Buffer for next word
* @param length Buffer length
* @return Current-iterator with new position
*/
template<class char_t>
inline char_t CopyNextWord( char_t it, char_t end, char *pBuffer, size_t length )
{
size_t index = 0;
it = getNextWord<char_t>( it, end );
while( !IsSpaceOrNewLine( *it ) && !isEndOfBuffer( it, end ) )
{
pBuffer[index] = *it ;
index++;
if (index == length-1)
break;
++it;
}
pBuffer[ index ] = '\0';
return it;
}
/** @brief Get next float from given line
* @param it set to current position
* @param end set to end of scratch buffer for readout
* @param value Separated float value.
* @return Current-iterator with new position
*/
template<class char_t>
inline char_t getFloat( char_t it, char_t end, ai_real &value )
{
static const size_t BUFFERSIZE = 1024;
char buffer[ BUFFERSIZE ];
it = CopyNextWord<char_t>( it, end, buffer, BUFFERSIZE );
value = (ai_real) fast_atof( buffer );
return it;
}
/** @brief Will perform a simple tokenize.
* @param str String to tokenize.
* @param tokens Array with tokens, will be empty if no token was found.
* @param delimiters Delimiter for tokenize.
* @return Number of found token.
*/
template<class string_type>
unsigned int tokenize( const string_type& str, std::vector<string_type>& tokens,
const string_type& delimiters )
{
// Skip delimiters at beginning.
typename string_type::size_type lastPos = str.find_first_not_of( delimiters, 0 );
// Find first "non-delimiter".
typename string_type::size_type pos = str.find_first_of( delimiters, lastPos );
while ( string_type::npos != pos || string_type::npos != lastPos )
{
// Found a token, add it to the vector.
string_type tmp = str.substr(lastPos, pos - lastPos);
if ( !tmp.empty() && ' ' != tmp[ 0 ] )
tokens.push_back( tmp );
// Skip delimiters. Note the "not_of"
lastPos = str.find_first_not_of( delimiters, pos );
// Find next "non-delimiter"
pos = str.find_first_of( delimiters, lastPos );
}
return static_cast<unsigned int>( tokens.size() );
}
template <class string_type>
string_type trim_whitespaces(string_type str)
{
while (!str.empty() && IsSpace(str[0])) str.erase(0);
while (!str.empty() && IsSpace(str[str.length() - 1])) str.erase(str.length() - 1);
return str;
}
template<class T>
bool hasLineEnd( T it, T end ) {
bool hasLineEnd( false );
while ( !isEndOfBuffer( it, end ) ) {
it++;
if ( IsLineEnd( it ) ) {
hasLineEnd = true;
break;
}
}
return hasLineEnd;
}
} // Namespace Assimp
#endif // OBJ_TOOLS_H_INC
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