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LaTeX Document  |  1997-03-26  |  6KB  |  144 lines
  1. %% This is file `calc.sty',
  2. %% generated with the docstrip utility.
  3. %% The original source files were:
  4. %% calc.dtx  (with options: `package')
  5. %% File `calc.dtx'.
  6. %% Copyright (C) 1992--1995 Kresten Krab Thorup and Frank Jensen.
  7. %% All rights reserved.
  8. \def\fileversion{v4.0c (TEST)}
  9. \def\filedate{1995/04/10}
  10. %% \CharacterTable
  11. %%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
  12. %%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
  13. %%   Digits        \0\1\2\3\4\5\6\7\8\9
  14. %%   Exclamation   \!     Double quote  \"     Hash (number) \#
  15. %%   Dollar        \$     Percent       \%     Ampersand     \&
  16. %%   Acute accent  \'     Left paren    \(     Right paren   \)
  17. %%   Asterisk      \*     Plus          \+     Comma         \,
  18. %%   Minus         \-     Point         \.     Solidus       \/
  19. %%   Colon         \:     Semicolon     \;     Less than     \<
  20. %%   Equals        \=     Greater than  \>     Question mark \?
  21. %%   Commercial at \@     Left bracket  \[     Backslash     \\
  22. %%   Right bracket \]     Circumflex    \^     Underscore    \_
  23. %%   Grave accent  \`     Left brace    \{     Vertical bar  \|
  24. %%   Right brace   \}     Tilde         \~}
  25. \NeedsTeXFormat{LaTeX2e}
  26. \ProvidesPackage{calc}[\filedate\space\fileversion]
  27. \typeout{Package: `calc' \fileversion\space <\filedate> (KKT and FJ)}
  28. \def\calc@assign@generic#1#2#3#4{\let\calc@A#1\let\calc@B#2%
  29.     \expandafter\calc@open\expandafter(#4!%
  30.     \global\calc@A\calc@B\endgroup#3\calc@B}
  31. \def\calc@assign@count{\calc@assign@generic\calc@Acount\calc@Bcount}
  32. \def\calc@assign@dimen{\calc@assign@generic\calc@Adimen\calc@Bdimen}
  33. \def\calc@assign@skip{\calc@assign@generic\calc@Askip\calc@Bskip}
  34. \newcount\calc@Acount   \newcount\calc@Bcount
  35. \newdimen\calc@Adimen   \newdimen\calc@Bdimen
  36. \newskip\calc@Askip     \newskip\calc@Bskip
  37. \def\setcounter#1#2{\@ifundefined{c@#1}{\@nocounterr{#1}}%
  38.    {\calc@assign@count{\global\csname c@#1\endcsname}{#2}}}
  39. \def\addtocounter#1#2{\@ifundefined{c@#1}{\@nocounterr{#1}}%
  40.    {\calc@assign@count{\global\advance\csname c@#1\endcsname}{#2}}}
  41. \DeclareRobustCommand\setlength{\calc@assign@skip}
  42. \DeclareRobustCommand\addtolength[1]{\calc@assign@skip{\advance#1}}
  43. \def\calc@pre@scan#1{%
  44.    \ifx(#1%
  45.        \let\calc@next\calc@open
  46.    \else
  47.        \let\calc@next\calc@numeric
  48.    \fi
  49.    \calc@next#1}
  50. \def\calc@open({\begingroup\aftergroup\calc@initB
  51.    \begingroup\aftergroup\calc@initB
  52.    \calc@pre@scan}
  53. \def\calc@initB{\calc@B\calc@A}
  54. \def\calc@numeric{\afterassignment\calc@post@scan \global\calc@A}
  55. \def\calc@post@scan#1{%
  56.    \ifx#1!\let\calc@next\endgroup \else
  57.     \ifx#1+\let\calc@next\calc@add \else
  58.      \ifx#1-\let\calc@next\calc@subtract \else
  59.       \ifx#1*\let\calc@next\calc@multiplyx \else
  60.        \ifx#1/\let\calc@next\calc@dividex \else
  61.         \ifx#1)\let\calc@next\calc@close \else \calc@error#1%
  62.         \fi
  63.        \fi
  64.       \fi
  65.      \fi
  66.     \fi
  67.    \fi
  68.    \calc@next}
  69. \def\calc@add{\calc@generic@add\calc@addAtoB}
  70. \def\calc@subtract{\calc@generic@add\calc@subtractAfromB}
  71. \def\calc@generic@add#1{\endgroup\global\calc@A\calc@B\endgroup
  72.    \begingroup\aftergroup#1\begingroup\aftergroup\calc@initB
  73.    \calc@pre@scan}
  74. \def\calc@addAtoB{\advance\calc@B\calc@A}
  75. \def\calc@subtractAfromB{\advance\calc@B-\calc@A}
  76. \def\calc@multiplyx#1{\def\calc@tmp{#1}%
  77.    \ifx\calc@tmp\calc@ratio@x \let\calc@next\calc@ratio@multiply \else
  78.       \ifx\calc@tmp\calc@real@x \let\calc@next\calc@real@multiply \else
  79.          \let\calc@next\calc@multiply
  80.       \fi
  81.    \fi
  82.    \calc@next#1}
  83. \def\calc@dividex#1{\def\calc@tmp{#1}%
  84.    \ifx\calc@tmp\calc@ratio@x \let\calc@next\calc@ratio@divide \else
  85.       \ifx\calc@tmp\calc@real@x \let\calc@next\calc@real@divide \else
  86.          \let\calc@next\calc@divide
  87.       \fi
  88.    \fi
  89.    \calc@next#1}
  90. \def\calc@ratio@x{\ratio}
  91. \def\calc@real@x{\real}
  92. \def\calc@multiply{\calc@generic@multiply\calc@multiplyBbyA}
  93. \def\calc@divide{\calc@generic@multiply\calc@divideBbyA}
  94. \def\calc@generic@multiply#1{\endgroup\begingroup
  95.    \let\calc@A\calc@Acount \let\calc@B\calc@Bcount
  96.    \aftergroup#1\calc@pre@scan}
  97. \def\calc@multiplyBbyA{\multiply\calc@B\calc@Acount}
  98. \def\calc@divideBbyA{\divide\calc@B\calc@Acount}
  99. \def\calc@close
  100.    {\endgroup\global\calc@A\calc@B
  101.     \endgroup\global\calc@A\calc@B
  102.     \calc@post@scan}
  103. \def\calc@ratio@multiply\ratio{\calc@ratio@evaluate}
  104. \def\calc@ratio@divide\ratio#1#2{\calc@ratio@evaluate{#2}{#1}}
  105. \let\calc@numerator=\calc@Bcount
  106. \newcount\calc@denominator
  107. \def\calc@ratio@evaluate#1#2{%
  108.    \endgroup\begingroup
  109.       \calc@assign@dimen\calc@numerator{#1}%
  110.       \calc@assign@dimen\calc@denominator{#2}%
  111.       \gdef\calc@the@ratio{}%
  112.       \ifnum\calc@numerator<0 \calc@numerator-\calc@numerator
  113.          \gdef\calc@the@ratio{-}%
  114.       \fi
  115.       \ifnum\calc@denominator<0 \calc@denominator-\calc@denominator
  116.          \xdef\calc@the@ratio{\calc@the@ratio-}%
  117.       \fi
  118.       \calc@Acount\calc@numerator
  119.       \divide\calc@Acount\calc@denominator
  120.       \xdef\calc@the@ratio{\calc@the@ratio\number\calc@Acount.}%
  121.       \calc@next@digit \calc@next@digit \calc@next@digit
  122.       \calc@next@digit \calc@next@digit \calc@next@digit
  123.    \endgroup
  124.    \calc@multiply@by@real\calc@the@ratio
  125.    \begingroup
  126.    \calc@post@scan}
  127. \def\calc@next@digit{%
  128.       \multiply\calc@Acount\calc@denominator
  129.       \advance\calc@numerator -\calc@Acount
  130.       \multiply\calc@numerator 10
  131.       \calc@Acount\calc@numerator
  132.       \divide\calc@Acount\calc@denominator
  133.       \xdef\calc@the@ratio{\calc@the@ratio\number\calc@Acount}}
  134. \def\calc@multiply@by@real#1{\calc@Bdimen #1\calc@B \calc@B\calc@Bdimen}
  135. \def\calc@real@multiply\real#1{\endgroup
  136.    \calc@multiply@by@real{#1}\begingroup
  137.    \calc@post@scan}
  138. \def\calc@real@divide\real#1{\calc@ratio@evaluate{1pt}{#1pt}}
  139. \def\calc@error#1{%
  140.    \errhelp{Calc error: I expected to see one of: + - * / )}%
  141.    \errmessage{Invalid character `#1' in arithmetic expression}}
  142. \endinput
  143. %% End of file `calc.sty'.
  144.