1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/assimp/LineSplitter.h	Sat Feb 01 19:58:19 2014 +0200
     1.3 @@ -0,0 +1,242 @@
     1.4 +/*
     1.5 +Open Asset Import Library (assimp)
     1.6 +----------------------------------------------------------------------
     1.7 +
     1.8 +Copyright (c) 2006-2012, assimp team
     1.9 +All rights reserved.
    1.10 +
    1.11 +Redistribution and use of this software in source and binary forms, 
    1.12 +with or without modification, are permitted provided that the 
    1.13 +following conditions are met:
    1.14 +
    1.15 +* Redistributions of source code must retain the above
    1.16 +  copyright notice, this list of conditions and the
    1.17 +  following disclaimer.
    1.18 +
    1.19 +* Redistributions in binary form must reproduce the above
    1.20 +  copyright notice, this list of conditions and the
    1.21 +  following disclaimer in the documentation and/or other
    1.22 +  materials provided with the distribution.
    1.23 +
    1.24 +* Neither the name of the assimp team, nor the names of its
    1.25 +  contributors may be used to endorse or promote products
    1.26 +  derived from this software without specific prior
    1.27 +  written permission of the assimp team.
    1.28 +
    1.29 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
    1.30 +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
    1.31 +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    1.32 +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
    1.33 +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    1.34 +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
    1.35 +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    1.36 +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
    1.37 +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
    1.38 +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
    1.39 +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    1.40 +
    1.41 +----------------------------------------------------------------------
    1.42 +*/
    1.43 +
    1.44 +/** @file  LineSplitter.h
    1.45 + *  @brief LineSplitter, a helper class to iterate through all lines
    1.46 + *    of a file easily. Works with StreamReader.
    1.47 + */
    1.48 +#ifndef INCLUDED_LINE_SPLITTER_H
    1.49 +#define INCLUDED_LINE_SPLITTER_H
    1.50 +
    1.51 +#include <stdexcept>
    1.52 +
    1.53 +#include "StreamReader.h"
    1.54 +#include "ParsingUtils.h"
    1.55 +
    1.56 +namespace Assimp {
    1.57 +
    1.58 +// ------------------------------------------------------------------------------------------------
    1.59 +/** Usage:
    1.60 +@code
    1.61 +for(LineSplitter splitter(stream);splitter;++splitter) {
    1.62 +
    1.63 +	if (*splitter == "hi!") {
    1.64 +	   ...
    1.65 +	}
    1.66 +    else if (splitter->substr(0,5) == "hello") {
    1.67 +	   ...
    1.68 +	   // access the third token in the line (tokens are space-separated)
    1.69 +	   if (strtol(splitter[2]) > 5) { .. }
    1.70 +	}
    1.71 +
    1.72 +	std::cout << "Current line is: " << splitter.get_index() << std::endl;
    1.73 +}
    1.74 +@endcode */
    1.75 +// ------------------------------------------------------------------------------------------------
    1.76 +class LineSplitter
    1.77 +{
    1.78 +public:
    1.79 +
    1.80 +	typedef size_t line_idx;
    1.81 +
    1.82 +public:
    1.83 +
    1.84 +	// -----------------------------------------
    1.85 +	/** construct from existing stream reader 
    1.86 +	note: trim is *always* assumed true if skyp_empty_lines==true
    1.87 +	*/
    1.88 +	LineSplitter(StreamReaderLE& stream, bool skip_empty_lines = true, bool trim = true)
    1.89 +		: stream(stream)
    1.90 +		, swallow()
    1.91 +		, skip_empty_lines(skip_empty_lines)
    1.92 +		, trim(trim)
    1.93 +	{
    1.94 +		cur.reserve(1024);
    1.95 +		operator++();
    1.96 +
    1.97 +		idx = 0;
    1.98 +	}
    1.99 +
   1.100 +public:
   1.101 +
   1.102 +	// -----------------------------------------
   1.103 +	/** pseudo-iterator increment */
   1.104 +	LineSplitter& operator++() {
   1.105 +		if(swallow) {
   1.106 +			swallow = false;
   1.107 +			return *this;
   1.108 +		}
   1.109 +		
   1.110 +		if (!*this) {
   1.111 +			throw std::logic_error("End of file, no more lines to be retrieved.");
   1.112 +		}
   1.113 +
   1.114 +		char s;
   1.115 +
   1.116 +		cur.clear();
   1.117 +		while(stream.GetRemainingSize() && (s = stream.GetI1(),1)) {
   1.118 +			if (s == '\n' || s == '\r') {
   1.119 +				if (skip_empty_lines) {
   1.120 +					while (stream.GetRemainingSize() && ((s = stream.GetI1()) == ' ' || s == '\r' || s == '\n'));
   1.121 +					if (stream.GetRemainingSize()) {
   1.122 +						stream.IncPtr(-1);
   1.123 +					}
   1.124 +				}
   1.125 +				else {
   1.126 +					// skip both potential line terminators but don't read past this line.
   1.127 +					if (stream.GetRemainingSize() && (s == '\r' && stream.GetI1() != '\n')) {
   1.128 +						stream.IncPtr(-1);
   1.129 +					}
   1.130 +
   1.131 +					if (trim) {
   1.132 +						while (stream.GetRemainingSize() && ((s = stream.GetI1()) == ' ' || s == '\t'));
   1.133 +						if (stream.GetRemainingSize()) {
   1.134 +							stream.IncPtr(-1);
   1.135 +						}
   1.136 +					}
   1.137 +				}
   1.138 +				
   1.139 +				break;
   1.140 +			}
   1.141 +			cur += s;
   1.142 +		}
   1.143 +
   1.144 +		++idx;
   1.145 +		return *this;
   1.146 +	}
   1.147 +
   1.148 +	// -----------------------------------------
   1.149 +	LineSplitter& operator++(int) {
   1.150 +		return ++(*this);
   1.151 +	}
   1.152 +
   1.153 +	// -----------------------------------------
   1.154 +	/** get a pointer to the beginning of a particular token */
   1.155 +	const char* operator[] (size_t idx) const {
   1.156 +		const char* s = operator->()->c_str();
   1.157 +
   1.158 +		SkipSpaces(&s);
   1.159 +		for(size_t i = 0; i < idx; ++i) {
   1.160 +
   1.161 +			for(;!IsSpace(*s); ++s) {
   1.162 +				if(IsLineEnd(*s)) {
   1.163 +					throw std::range_error("Token index out of range, EOL reached");
   1.164 +				}
   1.165 +			}
   1.166 +			SkipSpaces(&s);
   1.167 +		}
   1.168 +		return s;
   1.169 +	}
   1.170 +
   1.171 +	// -----------------------------------------
   1.172 +	/** extract the start positions of N tokens from the current line*/
   1.173 +	template <size_t N>
   1.174 +	void get_tokens(const char* (&tokens)[N]) const {
   1.175 +		const char* s = operator->()->c_str();
   1.176 +
   1.177 +		SkipSpaces(&s);
   1.178 +		for(size_t i = 0; i < N; ++i) {
   1.179 +			if(IsLineEnd(*s)) {
   1.180 +				throw std::range_error("Token count out of range, EOL reached");
   1.181 +			}
   1.182 +			tokens[i] = s;
   1.183 +
   1.184 +			for(;*s && !IsSpace(*s); ++s);
   1.185 +			SkipSpaces(&s);
   1.186 +		}
   1.187 +	}
   1.188 +
   1.189 +	// -----------------------------------------
   1.190 +	/** member access */
   1.191 +	const std::string* operator -> () const {
   1.192 +		return &cur;
   1.193 +	}
   1.194 +
   1.195 +	std::string operator* () const {
   1.196 +		return cur;
   1.197 +	}
   1.198 +
   1.199 +	// -----------------------------------------
   1.200 +	/** boolean context */
   1.201 +	operator bool() const {
   1.202 +		return stream.GetRemainingSize()>0;
   1.203 +	}
   1.204 +
   1.205 +	// -----------------------------------------
   1.206 +	/** line indices are zero-based, empty lines are included */
   1.207 +	operator line_idx() const {
   1.208 +		return idx;
   1.209 +	}
   1.210 +
   1.211 +	line_idx get_index() const {
   1.212 +		return idx;
   1.213 +	}
   1.214 +
   1.215 +	// -----------------------------------------
   1.216 +	/** access the underlying stream object */
   1.217 +	StreamReaderLE& get_stream() {
   1.218 +		return stream;
   1.219 +	}
   1.220 +
   1.221 +	// -----------------------------------------
   1.222 +	/** !strcmp((*this)->substr(0,strlen(check)),check) */
   1.223 +	bool match_start(const char* check) {
   1.224 +		const size_t len = strlen(check);
   1.225 +		
   1.226 +		return len <= cur.length() && std::equal(check,check+len,cur.begin());
   1.227 +	}
   1.228 +
   1.229 +
   1.230 +	// -----------------------------------------
   1.231 +	/** swallow the next call to ++, return the previous value. */
   1.232 +	void swallow_next_increment() {
   1.233 +		swallow = true;
   1.234 +	}
   1.235 +
   1.236 +private:
   1.237 +
   1.238 +	line_idx idx;
   1.239 +	std::string cur;
   1.240 +	StreamReaderLE& stream;
   1.241 +	bool swallow, skip_empty_lines, trim;
   1.242 +};
   1.243 +
   1.244 +}
   1.245 +#endif // INCLUDED_LINE_SPLITTER_H