Babel, a multilingual package for use with LATEX's ... - linsrv.net

105 \DeclareOption{math=normal}{\def\bbl@mathnormal{\noexpand\textormath}}
106 \DeclareOption{hyphenmap=off}{\chardef\bbl@hymapopt\z@}
107 \DeclareOption{hyphenmap=first}{\chardef\bbl@hymapopt\@ne}
108 \DeclareOption{hyphenmap=select}{\chardef\bbl@hymapopt\tw@}
109 \DeclareOption{hyphenmap=other}{\chardef\bbl@hymapopt\thr@@}
110 \DeclareOption{hyphenmap=other*}{\chardef\bbl@hymapopt4\relax}
Handling of package options is done in three passes. (I [JBL] am not very happy
with the idea, anyway.) The first one processes options which has been declared
above or follow the syntax =, the second one loads the requested
languages, except the main one if set with the key main, and the third one loads
the latter. First, we “flag” valid keys with a nil value.
111 \let\bbl@opt@shorthands\@nnil
112 \let\bbl@opt@config\@nnil
113 \let\bbl@opt@main\@nnil
114 \let\bbl@opt@strings\@nnil
115 \let\bbl@opt@headfoot\@nnil
The following tool is defined temporarily to store the values of options.
116 \def\bbl@tempa#1=#2\bbl@tempa{%
117 \expandafter\ifx\csname bbl@opt@#1\endcsname\@nnil
118 \expandafter\edef\csname bbl@opt@#1\endcsname{#2}%
119 \else
120 \bbl@error{%
121 Bad option ‘#1=#2’. Either you have misspelled the\\%
122 key or there is a previous setting of ‘#1’}{%
123 Valid keys are ‘shorthands’, ‘config’, ‘strings’, ‘main’,\\%
124 ‘headfoot’, ‘safe’, ‘math’}
125 \fi}
Now the option list is processed, taking into account only currently declared
options (including those declared with a =), and = options (the
former take precedence). Unrecognized options are saved in
\bbl@language@opts, because they are language options.
126 \let\bbl@language@opts\@empty
127 \DeclareOption*{%
128 \@expandtwoargs\in@{\string=}{\CurrentOption}%
129 \ifin@
130 \expandafter\bbl@tempa\CurrentOption\bbl@tempa
131 \else
132 \edef\bbl@language@opts{%
133 \ifx\bbl@language@opts\@empty\else\bbl@language@opts,\fi
134 \CurrentOption}%
135 \fi}
Now we finish the first pass (and start over).
136 \ProcessOptions*
6.3 Conditional loading of shorthands
If there is no shorthands=, the original babel macros are left untouched,
but if there is, these macros are wrapped (in babel.def) to define only those given.
A bit of optimization: if there is no shorthands=, then \bbl@ifshorthands is
always true, and it is always false if shorthands is empty. Also, some code makes
sense only with shorthands=....
137 \def\bbl@sh@string#1{%
35