Changeset ad5c8a48 in mainline for uspace/app/bithenge/expression.c

Timestamp:

2012-08-07T21:35:50Z (13 years ago)

Author:

Sean Bartell <wingedtachikoma@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

a66ea217

Parents:

c12b2ae

Message:

Bithenge: add expressions with binary operators

File:

• uspace/app/bithenge/expression.c (modified) (1 diff)

uspace/app/bithenge/expression.c

@@ -94 +94 @@
                 return rc;
         }
+
+        /* Check types and get values. */
+        bithenge_int_t a_int, b_int;
         switch (self->op) {
+        case BITHENGE_EXPRESSION_ADD: /* fallthrough */
+        case BITHENGE_EXPRESSION_SUBTRACT: /* fallthrough */
+        case BITHENGE_EXPRESSION_MULTIPLY:
+                rc = EINVAL;
+                if (bithenge_node_type(a) != BITHENGE_NODE_INTEGER)
+                        goto error;
+                if (bithenge_node_type(b) != BITHENGE_NODE_INTEGER)
+                        goto error;
+                a_int = bithenge_integer_node_value(a);
+                b_int = bithenge_integer_node_value(b);
+                break;
+        default:
+                break;
+        }
+
+        switch (self->op) {
+        case BITHENGE_EXPRESSION_ADD:
+                rc = bithenge_new_integer_node(out, a_int + b_int);
+                break;
+        case BITHENGE_EXPRESSION_SUBTRACT:
+                rc = bithenge_new_integer_node(out, a_int - b_int);
+                break;
+        case BITHENGE_EXPRESSION_MULTIPLY:
+                rc = bithenge_new_integer_node(out, a_int * b_int);
+                break;
         case BITHENGE_EXPRESSION_EQUALS:
                 rc = bithenge_new_boolean_node(out, bithenge_node_equal(a, b));
                 break;
-        }
+        case BITHENGE_EXPRESSION_INVALID_BINARY_OP:
+                assert(false);
+                break;
+        }
+
+error:
         bithenge_node_dec_ref(a);
         bithenge_node_dec_ref(b);