Refactored and relocated the set and get functions of all column types,

both within and out of the context of a view

src/obidmscolumn.c

@@ -1418,7 +1418,53 @@ index_t obi_column_get_element_index_from_name(OBIDMS_column_p column, const cha
 }
 
 
-char* obi_column_format_date(time_t date)
+int obi_column_prepare_to_set_value(OBIDMS_column_p column, index_t line_nb)
+{
+	// Check if the column is read-only
+	if (!(column->writable))
+	{
+		obi_set_errno(OBICOL_UNKNOWN_ERROR);
+		obidebug(1, "\nError trying to set a value in a read-only column");
+    	return -1;
+	}
+
+	// Check that the line number is not greater than the maximum allowed
+	if (line_nb >= MAXIMUM_LINE_COUNT)
+	{
+		obi_set_errno(OBICOL_UNKNOWN_ERROR);
+		obidebug(1, "\nError trying to set a value at a line number greater than the maximum allowed");
+    	return -1;
+	}
+
+	// Check if the file needs to be enlarged
+	while ((line_nb+1) > (column->header)->line_count)
+	{
+		// Enlarge the file
+		if (obi_enlarge_column(column) < 0)
+	    	return -1;
+	}
+
+	// Update lines used
+	if ((line_nb+1) > (column->header)->lines_used)
+		(column->header)->lines_used = line_nb+1;
+
+	return 0;
+}
+
+
+int obi_column_prepare_to_get_value(OBIDMS_column_p column, index_t line_nb)
+{
+	if ((line_nb+1) > ((column->header)->line_count))
+	{
+		obi_set_errno(OBICOL_UNKNOWN_ERROR);
+		obidebug(1, "\nError trying to get a value that is beyond the current number of lines used in the column");
+		return -1;
+	}
+	return 0;
+}
+
+
+char* obi_column_format_date(time_t date)	// TODO put in utils.c
 {
 	char*       formatted_time;
 	struct tm*  tmp;