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-% A small optimization package which provides
-%
-% \beginpgfmathparsecheckfornumber
-% ...
-% \endpgfmathparsecheckfornumber
-%
-% in order to optimize \pgfmathparse. It works as follows: inside of
-% the environment (which doesn't use scopes), \pgfmathparse is
-% *replaced* by a different method which uses an extremely fast check
-% to decide whether the input is a number number. Is so, it returns
-% the number. Otherwise, it invokes the standard math parser.
-% It is about 400% faster than \pgfmathparse if the argument *is* a
-% number.
-%
-% The \endpgfmathparsecheckfornumber is optional (no groups are
-% introduced)
-%
-% Copyright 2010 by Christian Feuersänger.
-%
-% Replaces \pgfmathparse by the fast number checker.
-\def\beginpgfmathparsecheckfornumber{%
- \let\pgfmathparse=\pgfmathparsehashedcheck
-}%
-\def\endpgfmathparsecheckfornumber{%
- \let\pgfmathparse=\pgfmathparsehashedcheck@orig
-}%
-
-\def\pgfmp@EOI{\pgfmp@EOI}%
-\def\pgfmathparsehashedcheck@isnumber@gobble#1\pgfmp@EOI{}
-
-\newdimen\r@pgfmathparse@hashedcheck@
-\newcount\c@pgfmathparse@hashedcheck@
-\let\pgfmathparsehashedcheck@orig=\pgfmathparse
-
-\def\pgfmathparsehashedcheck#1{%
- \edef\pgfmathparse@temp{#1}%
- \expandafter\pgfmathparsehashedcheck@isnumber@loop\pgfmathparse@temp\pgfmp@EOI
- \pgfmathparsehashedcheck@finalize{#1}%
-}%
-\def\pgfmathparsehashedcheck@finalize@isnonumber#1{%
- \pgfmathparsehashedcheck@orig{#1}%
- \let\pgfmathparsehashedcheck@finalize\pgfmathparsehashedcheck@finalize@isnumber
-}%
-\def\pgfmathparsehashedcheck@finalize@isnumber#1{%
- \r@pgfmathparse@hashedcheck@=#1pt
- \expandafter\pgfmathparsehashed@assign\the\r@pgfmathparse@hashedcheck@
- %--------------------------------------------------
- % %
- % \let\KKK=\pgfmathresult
- % \pgfmathparsehashedcheck@orig{#1}%
- % \ifx\KKK\pgfmathresult
- % \else
- % \pgfplots@error{FAILED FOR #1: expected `\pgfmathresult'; got `\KKK' (temp = \pgf@temp)}%
- % \fi
- %--------------------------------------------------
-}%
-{\catcode`\p=12\catcode`\t=12\gdef\PGF@TEMP{pt}}
-\expandafter\def\expandafter\pgfmathparsehashed@assign\expandafter#\expandafter1\expandafter.\expandafter#\expandafter2\PGF@TEMP{%
- \def\pgf@temp{#2}%
- \ifx\pgf@temp0%
- \def\pgfmathresult{#1}%
- \else
- \def\pgfmathresult{#1.#2}%
- \fi
-}%
-\let\pgfmathparsehashedcheck@finalize\pgfmathparsehashedcheck@finalize@isnumber
-
-\expandafter\def\csname pgf@pp+\endcsname{1}
-\expandafter\def\csname pgf@pp-\endcsname{1}
-\expandafter\def\csname pgf@p0\endcsname{1}
-\expandafter\def\csname pgf@p1\endcsname{1}
-\expandafter\def\csname pgf@p2\endcsname{1}
-\expandafter\def\csname pgf@p3\endcsname{1}
-\expandafter\def\csname pgf@p4\endcsname{1}
-\expandafter\def\csname pgf@p5\endcsname{1}
-\expandafter\def\csname pgf@p6\endcsname{1}
-\expandafter\def\csname pgf@p7\endcsname{1}
-\expandafter\def\csname pgf@p8\endcsname{1}
-\expandafter\def\csname pgf@p9\endcsname{1}
-\expandafter\def\csname pgf@p.\endcsname{1}
-
-\pgfutil@ifundefined{ifcsname}{%
- \def\pgfmathparsehashedcheck@isnumber@loop#1{%
- \expandafter\ifx\csname pgf@pp\string#1\endcsname\relax
- \expandafter\pgfmathparsehashedcheck@isnumber@loop
- \else
- \expandafter\pgfmathparsehashedcheck@isnumber@loop@\expandafter#1%
- \fi
- }%
- \def\pgfmathparsehashedcheck@isnumber@loop@#1{%
- \expandafter\ifx\csname pgf@p\string#1\endcsname\relax
- \expandafter\pgfmathparsehashedcheck@isnumber@loop@
- \else
- \expandafter\pgfmathparsehashedcheck@isnumber@endfalse\expandafter#1%
- \fi
- }%
-}{%
- \def\pgfmathparsehashedcheck@isnumber@loop#1{%
- \ifcsname pgf@pp\string#1\endcsname
- \expandafter\pgfmathparsehashedcheck@isnumber@loop
- \else
- \expandafter\pgfmathparsehashedcheck@isnumber@loop@\expandafter#1%
- \fi
- }%
- \def\pgfmathparsehashedcheck@isnumber@loop@#1{%
- \ifcsname pgf@p\string#1\endcsname
- \expandafter\pgfmathparsehashedcheck@isnumber@loop@
- \else
- \expandafter\pgfmathparsehashedcheck@isnumber@endfalse\expandafter#1%
- \fi
- }%
-}%
-\def\pgfmathparsehashedcheck@isnumber@endfalse#1{%
- \ifx#1\pgfmp@EOI
- \else
- \let\pgfmathparsehashedcheck@finalize=\pgfmathparsehashedcheck@finalize@isnonumber
- \expandafter\pgfmathparsehashedcheck@isnumber@gobble
- \fi
-}%
-
-
-\endinput