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1 files changed, 39 insertions, 0 deletions

diff --git a/pkg/tbtables/tbynll.x b/pkg/tbtables/tbynll.x
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+include "tbtables.h"
+
+# tbynll -- Y set rows to null
+# This procedure sets all columns in a range of rows to INDEF.
+# If the first row to be deleted is greater than the last row, or if
+# the range of rows is outside the allocated size of the table, nothing
+# is done.  It is not considered an error if the first row is less than
+# one or the last row is greater than the number of allocated rows in
+# the table.
+#
+# Phil Hodge,  7-Mar-1988  Subroutine created.
+
+procedure tbynll (tp, firstrow, lastrow)
+
+pointer tp			# i: pointer to table descriptor
+int	firstrow		# i: first row to be set to INDEF
+int	lastrow			# i: last row to be set to INDEF
+#--
+pointer sp
+pointer colptr			# scratch for array of column pointers
+int	row1, row2		# firstrow, lastrow truncated to 1, nrows
+int	k			# loop index for column number
+pointer tbcnum()
+errchk	tbyscn
+
+begin
+	row1 = max (1, firstrow)
+	row2 = min (TB_ALLROWS(tp), lastrow)
+
+	if (row1 > row2)
+	    return
+
+	call smark (sp)
+	call salloc (colptr, TB_NCOLS(tp), TY_INT)
+	do k = 1, TB_NCOLS(tp)
+	    Memi[colptr+k-1] = tbcnum (tp, k)
+	call tbyscn (tp, TB_FILE(tp), Memi[colptr], TB_NCOLS(tp), row1, row2)
+	call sfree (sp)
+end