Changeset 84e8a70 in mainline

Timestamp:

2012-07-28T23:43:23Z (12 years ago)

Author:

Sean Bartell <wingedtachikoma@…>

Branches:

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

Children:

d7c8e39f

Parents:

f85ca3f

Message:

Bithenge: fix struct_transform and add parameter test script

Location:

uspace

Files:

• app/bithenge/transform.c (modified) (8 diffs)
• dist/src/bithenge/test.bh (added)
• dist/src/bithenge/test.dat (added)

uspace/app/bithenge/transform.c

@@ -387 +387 @@
         bithenge_scope_t scope;
         bithenge_blob_t *blob;
+        bool prefix;
 } struct_node_t;
 
@@ -497 +498 @@
         }
 
-        aoff64_t remaining;
-        rc = bithenge_blob_size(blob, &remaining);
-        if (rc != EOK)
-                goto error;
-        if (remaining != 0) {
-                rc = EINVAL;
-                goto error;
+        if (!struct_node->prefix) {
+                aoff64_t remaining;
+                rc = bithenge_blob_size(blob, &remaining);
+                if (rc != EOK)
+                        goto error;
+                if (remaining != 0) {
+                        rc = EINVAL;
+                        goto error;
+                }
         }
 
@@ -514 +517 @@
 {
         struct_node_t *node = node_as_struct(base);
+
+        /* We didn't inc_ref for the scope in struct_transform_make_node, so
+         * make sure it doesn't try to dec_ref. */
+        node->scope.current_node = NULL;
+        bithenge_scope_destroy(&node->scope);
+
         bithenge_transform_dec_ref(struct_as_transform(node->transform));
         bithenge_blob_dec_ref(node->blob);
-        bithenge_scope_destroy(&node->scope);
         free(node);
 }
@@ -525 +533 @@
 };
 
-static int struct_transform_apply(bithenge_transform_t *base,
-    bithenge_scope_t *scope, bithenge_node_t *in, bithenge_node_t **out)
-{
-        struct_transform_t *self = transform_as_struct(base);
-        if (bithenge_node_type(in) != BITHENGE_NODE_BLOB)
-                return EINVAL;
+static int struct_transform_make_node(struct_transform_t *self,
+    bithenge_node_t **out, bithenge_scope_t *scope, bithenge_blob_t *blob,
+    bool prefix)
+{
         struct_node_t *node = malloc(sizeof(*node));
         if (!node)
@@ -547 +553 @@
                 return rc;
         }
-        bithenge_transform_inc_ref(base);
+        bithenge_transform_inc_ref(struct_as_transform(self));
+        bithenge_blob_inc_ref(blob);
         node->transform = self;
-        bithenge_node_inc_ref(in);
-        node->blob = bithenge_node_as_blob(in);
+        node->blob = blob;
+        node->prefix = prefix;
         *out = struct_as_node(node);
-        bithenge_node_inc_ref(*out);
+
+        /* We should inc_ref(*out) here, but that would make a cycle. Instead,
+         * we leave it 1 too low, so that when the only remaining use of *out
+         * is the scope, *out will be destroyed. Also see the comment in
+         * struct_node_destroy. */
         bithenge_scope_set_current_node(&node->scope, *out);
-        return EOK;
+
+        return EOK;
+}
+
+static int struct_transform_apply(bithenge_transform_t *base,
+    bithenge_scope_t *scope, bithenge_node_t *in, bithenge_node_t **out)
+{
+        struct_transform_t *self = transform_as_struct(base);
+        if (bithenge_node_type(in) != BITHENGE_NODE_BLOB)
+                return EINVAL;
+        return struct_transform_make_node(self, out, scope,
+            bithenge_node_as_blob(in), false);
 }
 
@@ -561 +583 @@
 {
         struct_transform_t *self = transform_as_struct(base);
-        int rc = EOK;
+        bithenge_node_t *struct_node;
+        int rc = struct_transform_make_node(self, &struct_node, scope, blob,
+            true);
+        if (rc != EOK)
+                return rc;
+        bithenge_scope_t *inner = &node_as_struct(struct_node)->scope;
+
         bithenge_node_t *node;
         bithenge_blob_inc_ref(blob);
@@ -574 +602 @@
                     self->subtransforms[i].transform;
                 aoff64_t sub_size;
-                rc = bithenge_transform_prefix_length(subxform, scope, blob,
+                rc = bithenge_transform_prefix_length(subxform, inner, blob,
                     &sub_size);
                 if (rc != EOK)
@@ -585 +613 @@
                 blob = bithenge_node_as_blob(node);
         }
+
 error:
+        bithenge_node_dec_ref(struct_node);
         bithenge_blob_dec_ref(blob);
-        return EOK;
+        return rc;
 }