Add conversion from expr to string.

2 files changed, 67 insertions, 0 deletions

diff --git a/src/libutil/expression.c b/src/libutil/expression.c
index 67db9e7de..c24f139b8 100644
--- a/src/libutil/expression.c
+++ b/src/libutil/expression.c
@@ -24,6 +24,7 @@
 
 #include "config.h"
 #include "expression.h"
+#include "printf.h"
 #include "regexp.h"
 
 enum rspamd_expression_op {
@@ -516,3 +517,62 @@ rspamd_process_expression (struct rspamd_expression *expr, gpointer data)
 
 	return 0;
 }
+
+GString *
+rspamd_expression_tostring (struct rspamd_expression *expr)
+{
+	GString *res;
+	struct rspamd_expression_elt *elt;
+	const char *op_str = NULL;
+	guint i;
+
+	g_assert (expr != NULL);
+
+	res = g_string_new (NULL);
+
+	for (i = 0; i < expr->expressions->len; i ++) {
+		elt = &g_array_index (expr->expressions, struct rspamd_expression_elt, i);
+
+		if (elt->type == ELT_ATOM) {
+			g_string_append_len (res, elt->p.atom->str, elt->p.atom->len);
+		}
+		else if (elt->type == ELT_LIMIT) {
+			rspamd_printf_gstring (res, "%d", elt->p.lim.val);
+		}
+		else {
+			switch (elt->p.op) {
+			case OP_MULT:
+				op_str = "*";
+				break;
+			case OP_PLUS:
+				op_str = "+";
+				break;
+			case OP_NOT:
+				op_str = "!";
+				break;
+			case OP_GE:
+				op_str = ">=";
+				break;
+			case OP_GT:
+				op_str = ">";
+				break;
+			case OP_LE:
+				op_str = "<=";
+				break;
+			case OP_LT:
+				op_str = ">=";
+				break;
+			default:
+				op_str = "???";
+				break;
+			}
+			g_string_append (res, op_str);
+		}
+
+		if (i != expr->expressions->len - 1) {
+			g_string_append_c (res, ' ');
+		}
+	}
+
+	return res;
+}
diff --git a/src/libutil/expression.h b/src/libutil/expression.h
index 4179424c6..7d771963d 100644
--- a/src/libutil/expression.h
+++ b/src/libutil/expression.h
@@ -77,4 +77,11 @@ gboolean rspamd_parse_expression (const gchar *line, gsize len,
  */
 gint rspamd_process_expression (struct rspamd_expression *expr, gpointer data);
 
+/**
+ * Shows string representation of an expression
+ * @param expr expression to show
+ * @return freshly allocated string with expression
+ */
+GString *rspamd_expression_tostring (struct rspamd_expression *expr);
+
 #endif /* SRC_LIBUTIL_EXPRESSION_H_ */