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authorNorbert Preining <norbert@preining.info>2021-05-16 03:00:44 +0000
committerNorbert Preining <norbert@preining.info>2021-05-16 03:00:44 +0000
commit2fc2609488764102ce43194e9288b7bd8e25f17f (patch)
tree9cf16b567d06c110c71e2c121c7cf5c16a086f02 /graphics/pgf/base/tex/pgfsys.code.tex
parentff5439d00ba53d3e4b82d79f78ce65524f3684fd (diff)
CTAN sync 202105160300
Diffstat (limited to 'graphics/pgf/base/tex/pgfsys.code.tex')
-rw-r--r--graphics/pgf/base/tex/pgfsys.code.tex25
1 files changed, 24 insertions, 1 deletions
diff --git a/graphics/pgf/base/tex/pgfsys.code.tex b/graphics/pgf/base/tex/pgfsys.code.tex
index 000eef098c..fd87b09181 100644
--- a/graphics/pgf/base/tex/pgfsys.code.tex
+++ b/graphics/pgf/base/tex/pgfsys.code.tex
@@ -1715,7 +1715,30 @@
% inserted into the resulting .pdf/.ps/.xxx file.
-
+% String comparison
+\ifdefined\pdfstrcmp
+ \let\pgfsys@strcmp\pdfstrcmp
+\else\ifdefined\strcmp
+ \let\pgfsys@strcmp\strcmp
+\else\ifdefined\directlua
+ \directlua{
+ local lft = lua.get_functions_table()
+ lft[\string#lft+1] = function()
+ local lhs = token.scan_string()
+ local rhs = token.scan_string()
+ if lhs < rhs then
+ tex.sprint(-2, "-1")
+ elseif lhs == rhs then
+ tex.sprint(-2, "0")
+ else
+ tex.sprint(-2, "1")
+ end
+ end
+ token.set_lua("pgfsys@strcmp", \string#lft, "global")
+ }
+\else
+ \def\pgfsys@strcmp#1#2{\pgf@sys@fail{string comparison}}%
+\fi\fi\fi
% Discern the driver: