3 files changed, 110 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/ptexdir/ChangeLog b/Build/source/texk/web2c/ptexdir/ChangeLog
index ba8d0f9432b..63b06a49d7f 100644
--- a/Build/source/texk/web2c/ptexdir/ChangeLog
+++ b/Build/source/texk/web2c/ptexdir/ChangeLog
@@ -1,3 +1,9 @@
+2017-11-30  Hironori Kitagawa  <h_kitagawa2001@yahoo.co.jp>
+
+	* ptex-base.ch: Suppress a space character printed after the name
+	of a multibyte control symbol in print_cs().
+	* tests/control-symbol.tex: Added.
+
 2017-10-04  Hironori Kitagawa  <h_kitagawa2001@yahoo.co.jp>
 
 	* ptex-base.ch: Direction check in \discretionary.
diff --git a/Build/source/texk/web2c/ptexdir/ptex-base.ch b/Build/source/texk/web2c/ptexdir/ptex-base.ch
index 1600827d507..0b32a4d49b0 100644
--- a/Build/source/texk/web2c/ptexdir/ptex-base.ch
+++ b/Build/source/texk/web2c/ptexdir/ptex-base.ch
@@ -1410,6 +1410,30 @@ end;
 tats
 @z
 
+@x [17.???] l.???? - pTeX multibyte control symbol
+procedure print_cs(@!p:integer); {prints a purported control sequence}
+@y
+procedure print_cs(@!p:integer); {prints a purported control sequence}
+var j, l:pool_pointer; @!cat:0..max_char_code;
+@z
+
+@x
+else  begin print_esc(text(p));
+  print_char(" ");
+  end;
+@y
+else  begin l:=text(p);
+  print_esc(l); j:=str_start[l]; l:=str_start[l+1];
+  if l>j+1 then begin
+    if l-j=multistrlen(ustringcast(str_pool), l, j) then
+      begin cat:=kcat_code(kcatcodekey(fromBUFF(ustringcast(str_pool), l, j)));
+      if (cat<>other_kchar) then print_char(" ");
+      end
+    else print_char(" "); end
+  else print_char(" ");
+  end;
+@z
+
 @x [18.265] l.5903 - pTeX: \jfont \tfont
 primitive("font",def_font,0);@/
 @!@:font_}{\.{\\font} primitive@>
diff --git a/Build/source/texk/web2c/ptexdir/tests/control-symbol.tex b/Build/source/texk/web2c/ptexdir/tests/control-symbol.tex
new file mode 100644
index 00000000000..b9e34054443
--- /dev/null
+++ b/Build/source/texk/web2c/ptexdir/tests/control-symbol.tex
@@ -0,0 +1,80 @@
+\scrollmode
+% plain TeX ソース
+\def\+{A}
+\def\＋{A}
+\def\X{\+}
+\def\Y{\＋}
+
+\message{■control symbol}
+% 記号類扱いの単文字命令 → control symbol
+% （この時の和文文字の挙動が tex-jp-build#37 の問題）
+\ifx\kanjiskip\undefined
+  \catcode`\+=12
+  \catcode`\＋=12
+\else
+  \catcode`\+=12
+  \kcatcode`＋=18
+\fi
+\show\X\relax\message{(\meaning\X)}
+\show\Y\relax\message{(\meaning\Y)}
+
+\message{■control word}
+% 普通の文字扱いの単文字命令 → control word
+\ifx\kanjiskip\undefined
+  \catcode`\+=11
+  \catcode`\＋=11
+\else
+  \catcode`\+=11
+  \kcatcode`＋=17
+\fi
+\show\X\relax\message{(\meaning\X)}
+\show\Y\relax\message{(\meaning\Y)}
+
+\message{■control word}
+% 複数文字命令 → control word
+\def\ABC{A}
+\def\あいう{A}
+\def\X{\ABC}
+\def\Y{\あいう}
+\show\X\relax\message{(\meaning\X)}
+\show\Y\relax\message{(\meaning\Y)}
+
+% csname
+\ifx\protected\undefined\else
+\catcode`\:=12
+\ifx\kanjiskip\undefined\else
+\kcatcode`！=18
+\fi
+\message{■csname}
+\protected\expandafter\def\csname :AB\endcsname{A}
+\protected\expandafter\def\csname ！あい\endcsname{A}
+\edef\X{\csname :AB\endcsname}
+\edef\Y{\csname ！あい\endcsname}
+\show\X\relax\message{(\meaning\X)}
+\show\Y\relax\message{(\meaning\Y)}
+
+\protected\expandafter\def\csname AB:\endcsname{A}
+\protected\expandafter\def\csname あい！\endcsname{A}
+\edef\X{\csname AB:\endcsname}
+\edef\Y{\csname あい！\endcsname}
+\show\X\relax\message{(\meaning\X)}
+\show\Y\relax\message{(\meaning\Y)}
+
+\ifx\ucs\undefined\else
+\message{■not_cjk}
+\kcatcode`ア=15
+\kcatcode`！=15
+\catcode"8A=12\relax
+\protected\expandafter\def\csname ア\endcsname{A}
+\protected\expandafter\def\csname ！\endcsname{A}
+\edef\X{\csname ア\endcsname}
+\edef\Y{\csname ！\endcsname}
+\show\X\relax\message{(\meaning\X)}
+\show\Y\relax\message{(\meaning\Y)}
+\fi
+\fi
+
+
+\end
+
+