1 files changed, 58 insertions, 0 deletions
diff --git a/pkg/tbtables/tbsopn.x b/pkg/tbtables/tbsopn.x
new file mode 100644
index 00000000..3139a297
--- /dev/null
+++ b/pkg/tbtables/tbsopn.x
@@ -0,0 +1,58 @@
+include <tbset.h>
+include "tbtables.h"
+
+# tbsopn -- call the row & column selector routines
+# This routine determines the subset of rows and columns that were selected
+# by expressions appended to the table name.
+#
+# Memory is allocated for TB_SELCOL_PTR(tp), which
+# should be deallocated when closing the table.  Also, rst_free and
+# tcs_close should be called to deallocate the row set and descriptors
+# that were allocated by tcs_open.
+#
+# Phil Hodge,  3-Mar-1998  Subroutine created.
+
+procedure tbsopn (tp, rowselect, colselect)
+
+pointer tp		# i: pointer to table descriptor
+char	rowselect[ARB]	# i: row selector string
+char	colselect[ARB]	# i: column selector string
+#--
+pointer trsrows()
+int	rst_nelem()
+errchk	trsrows, tcs_open
+
+begin
+	if (rowselect[1] != EOS) {
+
+	    # This creates a row set and checks each row of the table
+	    # for a match with the row selector string.
+	    TB_ROWSET(tp) = trsrows (tp, rowselect)
+
+	    # This is the number of selected rows.
+	    TB_NSEL_ROWS(tp) = rst_nelem (TB_ROWSET(tp))
+
+	    TB_ROW_SELECT(tp) = YES	# row selection is in effect
+
+	} else {
+
+	    TB_ROW_SELECT(tp) = NO	# row selection is not in effect
+	}
+
+	if (colselect[1] != EOS) {
+
+	    # Allocate enough space to select all columns.
+	    TB_MAX_SELCOLS(tp) = TB_NCOLS(tp)
+	    call malloc (TB_SELCOL_PTR(tp), TB_MAX_SELCOLS(tp), TY_POINTER)
+
+	    call tcs_open (tp, colselect,
+			TB_SELCOL(tp,1), TB_NSEL_COLS(tp), TB_MAX_SELCOLS(tp))
+
+	    TB_COLUMN_SELECT(tp) = YES	# column selection is in effect
+
+	} else {
+
+	    TB_COLUMN_SELECT(tp) = NO	# column selection is not in effect
+
+	}
+end