1 files changed, 226 insertions, 0 deletions
diff --git a/pkg/utilities/nttools/texpand/pushstack.x b/pkg/utilities/nttools/texpand/pushstack.x
new file mode 100644
index 00000000..58d8b797
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+++ b/pkg/utilities/nttools/texpand/pushstack.x
@@ -0,0 +1,226 @@
+include	<tbset.h>
+
+define	SZ_COLVAL	SZ_LINE
+
+# The following procedures treat a table as if it were a stack, that is,
+# all reading and writing is done at the end of the table. The end of the
+# table is indicated by TB_NROWS.
+#
+# B.Simon	25-Apr-88	Original
+# B.Simon	27-Jan-98	Drop temporary tables
+
+# PUSHSTACK -- Push a null row on the top of a table stack
+
+procedure pushstack (tp)
+
+pointer	tp		# i: Table descriptor
+#--
+int	top
+int	tbpsta()
+
+begin
+	top = tbpsta (tp, TBL_NROWS) + 1
+	call tbtwer (tp, top)
+end
+
+# POPSTACK -- Pop the top row from a table stack
+
+procedure popstack (tp)
+
+pointer	tp		# i: Table descriptor
+#--
+int	top
+int	tbpsta()
+
+begin
+	top = tbpsta (tp, TBL_NROWS)
+	if (top > 0)
+	    call tbrdel (tp, top, top)
+end
+
+# NUMSTACK -- Return the number of rows in a table stack
+
+int procedure numstack (tp)
+
+pointer	tp		# i: Table descriptor
+#--
+int	tbpsta()
+
+begin
+	return (tbpsta (tp, TBL_NROWS))
+end
+
+# INITSTACK -- Initialize a table stack and return its descriptor
+
+pointer procedure initstack (tp, extra)
+
+pointer	tp		# i: Table to use as a template for the table stack
+char	extra[ARB]	# i: Extra columns to add to the table stack
+#--
+char	comma
+int	ic, jc
+pointer	sp, cp, stack, colname, colunits, colfmt, tmproot, tmpfile
+
+int	stridx()
+pointer	tbtopn()
+
+errchk	tbtopn, tbtcre
+
+begin
+	# Set up arrays in dynamic memory
+
+	call smark (sp)
+	call salloc (colname, SZ_COLNAME, TY_CHAR)
+	call salloc (colunits, SZ_COLUNITS, TY_CHAR)
+	call salloc (colfmt, SZ_COLFMT, TY_CHAR)
+	call salloc (tmproot, SZ_FNAME, TY_CHAR)
+	call salloc (tmpfile, SZ_FNAME, TY_CHAR)
+
+	# Create the stack table
+
+	call mktemp ("tmp$stk", Memc[tmproot], SZ_FNAME)
+	call tbtext (Memc[tmproot], Memc[tmpfile], SZ_FNAME)
+	stack = tbtopn (Memc[tmpfile], NEW_COPY, tp)
+
+	# Set up column information that will not vary across columns
+
+	Memc[colunits] = EOS
+	Memc[colfmt] = EOS
+
+	# Add column names from the extra string
+
+	ic = 1
+	comma = ','
+	repeat {
+
+	    # Copy the next comma delimeted column name
+
+	    jc = stridx (comma, extra[ic])
+	    if (jc == 0)
+		call strcpy (extra[ic], Memc[colname], SZ_COLNAME)
+	    else
+		call strcpy (extra[ic], Memc[colname], jc-1)
+	    ic = ic + jc
+
+	    # Create the new column
+
+	    if (Memc[colname] != EOS)
+		call tbcdef (stack, cp, Memc[colname], Memc[colunits], 
+			     Memc[colfmt], TY_INT, 1, 1)
+
+	} until (jc == 0)
+
+	# Return the stack table descriptor
+
+	call tbtcre (stack)
+	call sfree (sp)
+
+	return (stack)
+end
+
+# FREESTACK -- Close and delete a table stack
+
+procedure freestack (tp)
+
+pointer	tp		# i: Table descriptor
+#--
+pointer	sp, table
+
+begin
+	call smark (sp)
+	call salloc (table, SZ_FNAME, TY_CHAR)
+
+	call tbtnam (tp, Memc[table], SZ_FNAME)
+	call tbtclo (tp)
+
+	call delete (Memc[table])
+	call sfree (sp)
+end
+
+# PUTSTACKT -- Put a text string in the top row of a table stack
+
+int procedure putstackt (tp, colname, colval)
+
+pointer	tp		# i: Table descriptor
+char	colname[ARB]	# i: Column name
+char	colval[ARB]	# i: Column value
+#--
+int	top, found
+pointer	cp
+
+int	tbpsta()
+
+begin
+	top = tbpsta (tp, TBL_NROWS)
+	call tbcfnd (tp, colname, cp, 1)
+
+	found = NO
+	if (cp != NULL) {
+	    ifnoerr {
+		call tbrptt (tp, cp, colval, ARB, 1, top)
+	    } then {
+		found = YES
+	    }
+	}
+
+	return (found)
+end
+
+# PUTSTACKI -- Put an integer  in the top row of a table stack
+
+procedure putstacki (tp, colname, colval)
+
+pointer	tp		# i: Table descriptor
+char	colname[ARB]	# i: Column name
+int	colval		# i: Column value
+#--
+int	top
+pointer	cp
+
+int	tbpsta()
+
+begin
+	top = tbpsta (tp, TBL_NROWS)
+
+	call tbcfnd (tp, colname, cp, 1)
+	call tbepti (tp, cp, top, colval)
+
+end
+
+# ANDSTACK -- Combine the top two rows of the table stack
+
+procedure andstack (tp)
+
+pointer	tp		# i: Table descriptor
+#--
+int	top
+int	tbpsta()
+
+begin
+	top = tbpsta (tp, TBL_NROWS)
+
+	call movtbrow (tp, top, tp, top-1)
+	call tbrdel (tp, top, top)
+end
+
+# MOVSTACK -- Move the top row of one table stack to another
+
+procedure movstack (rtp, wtp)
+
+pointer	rtp		# i: Table descriptor of table read from
+pointer	wtp		# i: Table descriptor of table written to
+#--
+int	rtop, wtop
+
+int	tbpsta()
+
+begin
+	call pushstack (wtp)
+
+	rtop = tbpsta (rtp, TBL_NROWS)
+	wtop = tbpsta (wtp, TBL_NROWS)
+
+	call movtbrow (rtp, rtop, wtp, wtop)
+	call tbrdel (rtp, rtop, rtop)
+
+end