From 64ff2c1f3dbbf15e0c89feeced72ba783a780df4 Mon Sep 17 00:00:00 2001
From: William Joye <wjoye@cfa.harvard.edu>
Date: Wed, 9 May 2018 15:50:03 -0400
Subject: add ds9 mecube parser

---
 ds9/library/mecube.tcl       | 33 +++++++++++++++++++++++++++++++++
 ds9/library/source.tcl       |  2 ++
 ds9/parsers/mecubelex.fcl    | 16 ++++++++++++++++
 ds9/parsers/mecubeparser.tac | 36 ++++++++++++++++++++++++++++++++++++
 4 files changed, 87 insertions(+)
 create mode 100644 ds9/parsers/mecubelex.fcl
 create mode 100644 ds9/parsers/mecubeparser.tac

diff --git a/ds9/library/mecube.tcl b/ds9/library/mecube.tcl
index 4523239..3c08660 100644
--- a/ds9/library/mecube.tcl
+++ b/ds9/library/mecube.tcl
@@ -81,6 +81,18 @@ proc ProcessMECubeCmd {varname iname sock fn} {
     upvar $varname var
     upvar $iname i
 
+    global debug
+    if {$debug(tcl,parser)} {
+	global mecube
+	set mecube(load,sock) $sock
+	set mecube(load,fn) $fn
+
+	mecube::YY_FLUSH_BUFFER
+	mecube::yy_scan_string [lrange $var $i end]
+	mecube::yyparse
+	incr i [expr $mecube::yycnt-1]
+    } else {
+
     switch -- [string tolower [lindex $var $i]] {
 	new {
 	    incr i
@@ -113,6 +125,27 @@ proc ProcessMECubeCmd {varname iname sock fn} {
     }
     FinishLoad
 }
+}
+
+proc MECubeCmdLoad {param} {
+    global mecube
+    
+    if {$mecube(load,sock) != {}} {
+	# xpa
+	if {![LoadMECubeSocket $mecube(load,sock) $param]} {
+	    InitError xpa
+	    LoadMECubeFile $param
+	}
+    } else {
+	# comm
+	if {$mecube(load,fn) != {}} {
+	    LoadMECubeAlloc $mecube(load,fn) $param
+	} else {
+	    LoadMECubeFile $param
+	}
+    }
+    FinishLoad
+}
 
 proc ProcessSendMECubeCmd {proc id param sock fn} {
     global current
diff --git a/ds9/library/source.tcl b/ds9/library/source.tcl
index 24364f2..91624db 100644
--- a/ds9/library/source.tcl
+++ b/ds9/library/source.tcl
@@ -250,6 +250,8 @@ source $ds9(root)/library/maskparser.tcl
 source $ds9(root)/library/masklex.tcl
 source $ds9(root)/library/matchparser.tcl
 source $ds9(root)/library/matchlex.tcl
+source $ds9(root)/library/mecubeparser.tcl
+source $ds9(root)/library/mecubelex.tcl
 source $ds9(root)/library/minmaxparser.tcl
 source $ds9(root)/library/minmaxlex.tcl
 source $ds9(root)/library/modeparser.tcl
diff --git a/ds9/parsers/mecubelex.fcl b/ds9/parsers/mecubelex.fcl
new file mode 100644
index 0000000..ad9d44a
--- /dev/null
+++ b/ds9/parsers/mecubelex.fcl
@@ -0,0 +1,16 @@
+#tab mecubeparser.tab.tcl
+
+%{
+%}
+
+#include defs.fin
+
+%%
+
+mask	    {return $MASK_}
+new	    {return $NEW_}
+slice	    {return $SLICE_}
+
+#include string.fin
+
+%%
diff --git a/ds9/parsers/mecubeparser.tac b/ds9/parsers/mecubeparser.tac
new file mode 100644
index 0000000..cb4b8ff
--- /dev/null
+++ b/ds9/parsers/mecubeparser.tac
@@ -0,0 +1,36 @@
+%{
+%}
+
+#include string.tin
+
+%start command
+
+%token MASK_
+%token NEW_
+%token SLICE_
+
+%%
+
+command : mecube 
+ | mecube {yyclearin; YYACCEPT} STRING_
+ ;
+
+mecube : opts {MECubeCmdLoad {}}
+ | opts STRING_ {MECubeCmdLoad $2}
+ ;
+
+opts :
+ | NEW_ {CreateFrame}
+ | MASK_
+ | SLICE_
+ ;
+
+%%
+
+proc mecube::yyerror {msg} {
+     variable yycnt
+     variable yy_current_buffer
+     variable index_
+
+     ParserError $msg $yycnt $yy_current_buffer $index_
+}
-- 
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