From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 23 Jan 2013 12:28:38 +0000 (+0300)
Subject: smatch_expressions: introduce deref_expression()
X-Git-Tag: 1.57~43
X-Git-Url: https://repo.or.cz/w/smatch.git/commitdiff_plain/23b4956a03d2025871e4d180f2e72dd7ef02614f

smatch_expressions: introduce deref_expression()

You give it the expression for "p" and it gives you "*p".

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---

diff --git a/smatch_expressions.c b/smatch_expressions.c
index 8c56e137..6bdf4448 100644
--- a/smatch_expressions.c
+++ b/smatch_expressions.c
@@ -37,6 +37,16 @@ struct expression *member_expression(struct expression *deref, int op, struct id
 	return expr;
 }
 
+struct expression *deref_expression(struct expression *expr)
+{
+	struct expression *preop;
+
+	preop = alloc_expression(pos, EXPR_PREOP);
+	preop->unop = expr;
+	preop->op = '*';
+	return preop;
+}
+
 struct expression *assign_expression(struct expression *left, struct expression *right)
 {
 	struct expression *expr;
diff --git a/smatch_extra.h b/smatch_extra.h
index c77f77b3..37cdeaed 100644
--- a/smatch_extra.h
+++ b/smatch_extra.h
@@ -143,6 +143,7 @@ void function_comparison(int comparison, struct expression *expr, sval_t sval, i
 struct expression *zero_expr();
 struct expression *value_expr(long long val);
 struct expression *member_expression(struct expression *deref, int op, struct ident *member);
+struct expression *deref_expression(struct expression *expr);
 struct expression *assign_expression(struct expression *left, struct expression *right);
 struct expression *symbol_expression(struct symbol *sym);