106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
/*
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Copyright (c) 2009-2010 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of LibCat nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CAT_BUFFER_TOK_HPP
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#define CAT_BUFFER_TOK_HPP
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#include <cat/Platform.hpp>
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namespace cat {
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/*
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MyBuf = " 123 5 : 6 "
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BufferTok bt(MyBuf, 256);
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int a, b, c;
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bt() >> a; // empty delimiter means white space and newlines
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bt(':') >> b >> c;
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if (!bt) // out of buffer space
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*/
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// Tokenize a buffer
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class BufferTok
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{
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const char *buffer;
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int len;
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char delimiter;
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bool newline;
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u32 readNext(char *token, u32 tokenBufferSize);
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public:
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BufferTok(const char *buffer, int len);
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// Returns true when the buffer is empty
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inline bool operator!() { return len <= 0; }
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// Returns true when the buffer extraction is stuck on a new line
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// Use operator[] to reset this flag
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inline bool onNewline() { return newline; }
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/*
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* operator(char)
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* Set the delimiter character
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*
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* This character is used to find the end of the current token
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* Newlines are always a delimiter
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*/
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BufferTok &operator()(char ch = 0);
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/*
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* Same as operator(), see above
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*
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* Also resets the newline() flag, so that data can start being
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* read from the next line. If newline() wasn't set, it searches
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* for the next line to start reading.
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*/
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BufferTok &operator[](char ch);
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/*
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* operator>>
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* Extract a token
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*
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* Strips whitespace and the end-of-token delimiter
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* Newlines are always a delimiter
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*
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* After the tokenizer encounters a newline, it will continue
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* returning no results with newline() flag set, until the
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* delimiter is reset with [], so incomplete lines don't wrap.
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*/
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BufferTok &operator>>(int &n);
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BufferTok &operator>>(char *n); // buffer must have at least 256 characters
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};
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} // namespace cat
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#endif // CAT_BUFFER_TOK_HPP
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