6 %% Avoid multiple loading.
7 \csname luatexjabaseLoaded\endcsname
9 \endlinechar=\the\endlinechar
12 \def\luatexjabaseLoaded{\endinput}
14 \ifltj@in@latex %<*LaTeX>
15 \NeedsTeXFormat{LaTeX2e}
16 \ProvidesPackage{ltj-base}[2020-08-04]
19 %%------------------ Tiny helpers
22 %\newcount\ltj@tempcnta % defined at luatexja-core.sty
23 \newcount\ltj@tempcntb
24 \newcount\ltj@tempcntc
25 \newdimen\ltj@tempdima
26 % \newskip\ltj@tempskipa unused
27 % \newtoks\ltj@temptoks unused
29 \countdef\ltj@@count@zero=0 %
30 \luatexattributedef\ltj@@attr@zero=0 %
31 \dimendef\ltj@@dimen@zero=0 %
32 \skipdef\ltj@@skip@zero=0 %
35 %! ただ expl3 の quark とは異なり展開されるとエラーになる.
37 \protected\def\ltj@q@stop{\ltj@q@stop@}
39 \protected\def\ltj@q@nil{\ltj@q@nil@}
41 \protected\def\ltj@q@mark{\ltj@q@mark@}
43 %! etoolbox の \letcs, \cslet, \csletcs.
45 \protected\def\ltj@letcs#1#2{
46 \expandafter\let\expandafter#1\csname#2\endcsname
50 \protected\def\ltj@cslet#1#2{
51 \expandafter\let\csname#1\endcsname#2
55 \protected\def\ltj@csletcs#1#2{
56 \expandafter\let\csname#1\expandafter\endcsname
60 %% \ltj@ifx{<sutff>}{<yes>}{<no>}
61 %! LaTeX 形式の \ifx. この形式の利点は自動的に条件ネストからの
63 % Does \ifx<stuff> test in LaTeX style.
65 \ifx#1\expandafter\ltx@firstoftwo
66 \else\expandafter\ltx@secondoftwo\fi
69 %% \ltj@if@empty{<stuff>}{<yes>}{<no>}
71 % Checks if <stuff> is empty.
72 \long\def\ltj@if@empty#1{
73 \ltj@ifx{\ltj@@q@empty#1\ltj@@q@empty}
75 \protected\def\ltj@@q@empty{\ltj@@q@empty@}
77 %% \ltj@if@blank{<stuff>}{<yes>}{<no>}
78 %! <stuff> が空または空白文字からなるか.
79 % Checks if <stuff> is either empty or consisting only of spaces.
81 \ltj@@if@blankA#1\ltj@@q@empty\ltj@@q@empty
82 \ltx@secondoftwo\ltx@firstoftwo\ltj@q@nil
84 \long\def\ltj@@if@blankA#1#2\ltj@@q@empty#3#4#5\ltj@q@nil{
88 %%------------------ LaTeX vs plain
89 \ifltj@in@latex %<*LaTeX>
93 %(Defined in luatexja-core.sty.)
97 \ltj@csletcs{ifltj@in@plain}{iffalse}
99 %% \ltj@print{<message>}
101 \let\ltj@print\typeout
106 \ifnum\pdf@strcmp{\fmtname}{plain}=0 %
107 \ltj@csletcs{ifltj@in@plain}{iftrue}
109 \ltj@csletcs{ifltj@in@plain}{iffalse}
112 %% \ltj@print{<message>}
114 \immediate\write16{#1}
118 %%------------------ Value-token handling
122 %% \ltj@gobble@num <number>
123 %! 次に続く整数を(2 回展開で)読み捨てる.
125 \directlua{token.scan_int()}
128 %% \ltj@gobble@glue <glue>
129 %! 次に続くグルー値を(2 回展開で)読み捨てる.
130 \def\ltj@gobble@glue{
131 \directlua{token.scan_glue()}
134 %% \ltj@gobble@dimen <dimen>
135 %! 次に続く寸法値を(2 回展開で)読み捨てる.
136 \def\ltj@gobble@dimen{
137 \directlua{token.scan_dimen()}
140 %% \ltj@grab@num <number>
141 %! 次に続く整数を読み取って, それと等しい整数を表すトークン列
142 %! (必ずしも整数表記とは限らない)を { } に入れたものに(2 回で)
144 %! ただし, 整数は以下の形式のいずれかでなければならない.
145 %! - 整数表記(10 進, 8 進, 16 進, 文字)
147 %! - 内部整数パラメタ, countdef トークン
148 %! (command_name が "assign_int" であるトークン).
149 %! (注意: まだ文字表記(`A)に対応していません.)
151 \directlua{tex.sprint('{' .. token.scan_int() .. '}')}
154 %%------------------ Safe passing
156 % These macros convert a token sequence denoting a TeX value to its
157 % suitable notation in Lua, and when the argument is malformed then
158 % 'nil' is returned. They are all fully-expandable.
159 %! TeX の値を Lua 上の表記に変換する. 不正形式だと nil にする.
161 \def\ltj@@safe@end{\noexpand\ltj@@safe@end}
162 % behaves same as \relax but is distinct from it
165 % The value passed to lua instead of malformed value tokens.
166 \def\ltj@safe@invalid{(nil)}
168 %% \ltj@safe@num{<number>}
170 % For a number (integer).
172 \ltj@safe@num@or\ltj@safe@invalid
174 \def\ltj@safe@num@or#1#2{
175 \expandafter\expandafter\expandafter\ltj@@safe@numA
176 \ltj@gobble@num#2\ltj@@safe@end{#2}{#1}
178 \def\ltj@@safe@numA#1\ltj@@safe@end#2#3{
186 %% \ltj@safe@dimen{<dimen>}
188 % For a dimension. The result is a scaled-point value.
190 \ltj@safe@dimen@or\ltj@safe@invalid
192 \def\ltj@safe@dimen@or#1#2{
193 \expandafter\expandafter\expandafter\ltj@@safe@dimenA
194 \ltj@gobble@dimen#2\ltj@@safe@end{#2}{#1}
196 \def\ltj@@safe@dimenA#1\ltj@@safe@end#2#3{
198 (\number\dimexpr#2\relax)
204 %% \ltj@safe@real{<real>}
206 % For a real number given in decimal notation or a macro that
207 % expands to such notation.
208 \def\ltj@safe@real#1{
209 (tonumber("\luatexluaescapestring{#1}"))
212 %% \ltj@val@counter{<counter>}
214 % For the current value of a LaTeX counter.
215 \def\ltj@val@counter#1{
216 (\expandafter\number\csname c@#1\endcsname)
219 %% \ltj@val@skip{<skip>}
220 % For the current value of a skip (or LaTeX-length) parameter.
221 %! グルーレジスタ(LaTeX 長さ変数).
224 (luatexja.base.to_skip("\the\glueexpr#1\relax"))
226 %! 整形式の整数 → 数値 : \number#1
227 %! 内部寸法 → 数値 : \number#1
228 %! 整形式の寸法 → 数値 : \number\dimexpr#1\relax
230 %% \ltj@safe@str{<text>}
231 %! 文字列. (トークン列を非トークン化)
232 % Converts a token sequence to Lua string notation.
234 "\luatexluaescapestring{\detokenize{#1}}"
237 %% \ltj@luaescape{<text>}
238 %! 非トークン化して Lua エスケープ.
239 \def\ltj@luaescape#1{
240 \luatexluaescapestring{\detokenize{#1}}
242 %% \ltj@luaxescape{<text>}
243 %! 非トークン化せずに(展開ありで) Lua エスケープ.
244 %! つまり単なる \luatexescape.
245 \let\ltj@luaxescape\luatexluaescapestring
248 %%------------------ debug logging
249 \ifdefined\LuaTeXjaDebugEnabled
252 \RequireLuaModule{luatexja.debug}
254 %% \ltj@debug{<format>}{<arg>,...}
257 luatexja.base.debug(\ltj@safe@str{#1}
258 \ltj@if@blank{#2}{}{, }
263 %% \ltj@package@debug{<package>}{<format>}{<arg>,...}
264 \def\ltj@package@debug#1#2#3{
266 luatexja.base.package_debug(\ltj@safe@str{#1},
268 \ltj@if@blank{#3}{}{, }
276 \def\ltj@package@debug#1#2#3{}
280 %% \ltj@debug@logger\CS{<package>}
281 \def\ltj@debug@logger#1#2{
282 \def#1{\ltj@package@debug{#2}}
285 %% \ltj@afterbox <token><box>
286 %% -> \setbox\ltj@afbox<box><token>
287 %% from Sonja Maus, ``Looking Ahead for a <box>'',
288 %% TUGBoat, 11, No. 4, 1990.
290 \directlua{luatexja.afbox_number=\the\ltj@afbox}
291 \protected\def\ltj@afterbox#1{%
292 \def\ltj@afb@xarg{#1}%
293 \afterassignment\ltj@afb@x
294 \chardef\ltj@@next`.}
295 \def\ltj@afb@x{\futurelet\ltj@@next\ltj@afb@xtest}
297 \ifcase\ifx\ltj@@next\hbox\tw@\fi
298 \ifx\ltj@@next\vbox\tw@\fi
299 \ifx\ltj@@next\vtop\tw@\fi
300 \ifx\ltj@@next\box\@ne\fi
301 \ifx\ltj@@next\copy\@ne\fi
302 \ifx\ltj@@next\vsplit\@ne\fi
303 \ifx\ltj@@next\lastbox\@ne\fi
304 0% ``A <box> was ...'' error will be causes by \setbox later anyway.
305 \or\afterassignment\ltj@afb@xarg
306 \or\afterassignment\ltj@afb@xagarg
310 \def\ltj@afb@xagarg{\aftergroup\ltj@afb@xarg}
313 %%------------------ all done