285 lines
7.8 KiB
C++
285 lines
7.8 KiB
C++
/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2021, 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 <assimp/ParsingUtils.h>
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#include <assimp/fast_atof.h>
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#include <vector>
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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[in] it Iterator of current position.
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* @param[in] 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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if (it == end) {
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return true;
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}
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--end;
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return (it == end);
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}
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/**
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* @brief Returns next word separated by a space
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* @param[in] pBuffer Pointer to data buffer
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* @param[in] 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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while (!isEndOfBuffer(pBuffer, pEnd)) {
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if (!IsSpaceOrNewLine(*pBuffer) || IsLineEnd(*pBuffer)) {
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break;
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}
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++pBuffer;
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}
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return pBuffer;
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}
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/**
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* @brief Returns pointer a next token
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* @param[in] pBuffer Pointer to data buffer
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* @param[in] 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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while (!isEndOfBuffer(pBuffer, pEnd)) {
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if (IsSpaceOrNewLine(*pBuffer)) {
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break;
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}
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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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/**
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* @brief Skips a line
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* @param[in] it Iterator set to current position
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* @param[in] end Iterator set to end of scratch buffer for readout
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* @param[out] uiLine Current line number 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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while (!isEndOfBuffer(it, end) && !IsLineEnd(*it)) {
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++it;
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}
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if (it != end) {
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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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}
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return it;
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}
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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[in] it set to current position
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* @param[in] end set to end of scratch buffer for readout
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* @param[out] 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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name = "";
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if (isEndOfBuffer(it, end)) {
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return end;
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}
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char *pStart = &(*it);
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while (!isEndOfBuffer(it, end) && !IsLineEnd(*it)) {
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++it;
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}
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while (IsSpace(*it)) {
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--it;
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}
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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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name = strName;
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}
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return it;
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}
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/**
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* @brief Get a name from the current line. Do not preserve space
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* in the middle, 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 getNameNoSpace(char_t it, char_t end, std::string &name) {
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name = "";
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if (isEndOfBuffer(it, end)) {
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return end;
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}
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char *pStart = &(*it);
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while (!isEndOfBuffer(it, end) && !IsLineEnd(*it) && !IsSpaceOrNewLine(*it)) {
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++it;
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}
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while (isEndOfBuffer(it, end) || IsLineEnd(*it) || IsSpaceOrNewLine(*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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name = strName;
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}
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return it;
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}
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/**
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* @brief Get next word from given line
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* @param[in] it set to current position
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* @param[in] end set to end of scratch buffer for readout
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* @param[in] pBuffer Buffer for next word
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* @param[in] 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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size_t index = 0;
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it = getNextWord<char_t>(it, end);
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while (!IsSpaceOrNewLine(*it) && !isEndOfBuffer(it, end)) {
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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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}
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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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/**
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* @brief Get next float from given line
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* @param[in] it set to current position
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* @param[in] end set to end of scratch buffer for readout
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* @param[out] 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, ai_real &value) {
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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 = (ai_real)fast_atof(buffer);
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return it;
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}
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/**
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* @brief Will remove white-spaces for a string.
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* @param[in] str The string to clean
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* @return The trimmed string.
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*/
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template <class string_type>
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inline string_type trim_whitespaces(string_type str) {
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while (!str.empty() && IsSpace(str[0])) {
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str.erase(0);
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}
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while (!str.empty() && IsSpace(str[str.length() - 1])) {
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str.erase(str.length() - 1);
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}
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return str;
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}
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/**
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* @brief Checks for a line-end.
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* @param[in] it Current iterator in string.
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* @param[in] end End of the string.
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* @return The trimmed string.
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*/
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template <class T>
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bool hasLineEnd(T it, T end) {
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bool hasLineEnd = false;
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while (!isEndOfBuffer(it, end)) {
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++it;
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if (IsLineEnd(it)) {
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hasLineEnd = true;
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break;
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}
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}
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return hasLineEnd;
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}
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} // Namespace Assimp
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#endif // OBJ_TOOLS_H_INC
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