From 58f6608644d76112394217f1ab6d419a140a1a73 Mon Sep 17 00:00:00 2001
From: William Joye <wjoye@cfa.harvard.edu>
Date: Tue, 8 May 2018 16:16:01 -0400
Subject: add ds9 minmax parser

---
 ds9/parsers/minmaxlex.fcl    | 22 +++++++++++++++++++++
 ds9/parsers/minmaxparser.tac | 47 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+)
 create mode 100644 ds9/parsers/minmaxlex.fcl
 create mode 100644 ds9/parsers/minmaxparser.tac

diff --git a/ds9/parsers/minmaxlex.fcl b/ds9/parsers/minmaxlex.fcl
new file mode 100644
index 0000000..be171dd
--- /dev/null
+++ b/ds9/parsers/minmaxlex.fcl
@@ -0,0 +1,22 @@
+#tab minmaxparser.tab.tcl
+
+%{
+%}
+
+#include defs.fin
+
+%%
+
+close	    {return $CLOSE_}
+auto	    {return $AUTO_}
+datamin	    {return $DATAMIN_}
+irafmin	    {return $IRAFMIN_}
+interval    {return $INTERVAL_}
+mode	    {return $MODE_}
+sample	    {return $SAMPLE_}
+scan	    {return $SCAN_}
+
+#include numeric.fin
+#include string.fin
+
+%%
diff --git a/ds9/parsers/minmaxparser.tac b/ds9/parsers/minmaxparser.tac
new file mode 100644
index 0000000..7b926f2
--- /dev/null
+++ b/ds9/parsers/minmaxparser.tac
@@ -0,0 +1,47 @@
+%{
+%}
+
+#include numeric.tin
+#include string.tin
+
+%start command
+
+%token AUTO_
+%token DATAMIN_
+%token IRAFMIN_
+%token INTERVAL_
+%token MODE_
+%token SAMPLE_
+%token SCAN_
+
+%%
+
+#include numeric.trl
+
+command : minmax 
+ | minmax {yyclearin; YYACCEPT} STRING_
+ ;
+
+minmax : {ScaleCmdSet mode minmax ChangeScaleMode}
+ | mode {MinmaxCmdSet mode $1 ChangeMinMax}
+ | MODE_ mode {MinmaxCmdSet mode $2 ChangeMinMax}
+ | INTERVAL_ INT_ {MinmaxCmdSet sample $2 ChangeMinMax}
+ ;
+
+mode : SCAN_ {set _ scan}
+ | SAMPLE_ {set _ sample}
+ | DATAMIN_ {set _ datamin}
+ | IRAFMIN_ {set _ irafmin}
+# backward compatibility
+ | AUTO_ {set _ scan}
+ ;
+
+%%
+
+proc minmax::yyerror {msg} {
+     variable yycnt
+     variable yy_current_buffer
+     variable index_
+
+     ParserError $msg $yycnt $yy_current_buffer $index_
+}
-- 
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