Changeset f85ca3f in mainline for uspace/app/bithenge/transform.h

Timestamp:

2012-07-28T21:25:49Z (12 years ago)

Author:

Sean Bartell <wingedtachikoma@…>

Branches:

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

Children:

84e8a70

Parents:

32eb01b

Message:

Bithenge: add expressions that use the current node being created

File:

• uspace/app/bithenge/transform.h (modified) (4 diffs)

uspace/app/bithenge/transform.h

@@ -52 +52 @@
 typedef struct {
         /** @privatesection */
+        int num_params;
         bithenge_node_t **params;
-        int num_params;
+        bithenge_node_t *current_node;
 } bithenge_scope_t;
 
@@ -74 +75 @@
 static inline void bithenge_scope_init(bithenge_scope_t *scope)
 {
+        scope->num_params = 0;
         scope->params = NULL;
-        scope->num_params = 0;
+        scope->current_node = NULL;
 }
 
@@ -83 +85 @@
 static inline void bithenge_scope_destroy(bithenge_scope_t *scope)
 {
+        bithenge_node_dec_ref(scope->current_node);
         for (int i = 0; i < scope->num_params; i++)
                 bithenge_node_dec_ref(scope->params[i]);
@@ -104 +107 @@
         for (int i = 0; i < out->num_params; i++)
                 bithenge_node_inc_ref(out->params[i]);
-        return EOK;
+        out->current_node = scope->current_node;
+        if (out->current_node)
+                bithenge_node_inc_ref(out->current_node);
+        return EOK;
+}
+
+/** Set the current node being created. Takes a reference to @a node.
+ * @param scope The scope to set the current node in.
+ * @param node The current node being created.
+ * @return EOK on success or an error code from errno.h. */
+static inline void bithenge_scope_set_current_node(bithenge_scope_t *scope,
+    bithenge_node_t *node)
+{
+        bithenge_node_dec_ref(scope->current_node);
+        scope->current_node = node;
+}
+
+/** Get the current node being created, which may be NULL.
+ * @param scope The scope to get the current node from.
+ * @return The node being created, or NULL. */
+static inline bithenge_node_t *bithenge_scope_get_current_node(
+    bithenge_scope_t *scope)
+{
+        if (scope->current_node)
+                bithenge_node_inc_ref(scope->current_node);
+        return scope->current_node;
 }
 
 /** Allocate parameters. The parameters must then be set with @a
- * bithenge_scope_set_param.
+ * bithenge_scope_set_param. This must not be called on a scope that already
+ * has parameters.
  * @param scope The scope in which to allocate parameters.
  * @param num_params The number of parameters to allocate.