Runtime resource overlay: clean-up.

This is a combination of three minor clean-up tasks:

- Generate correct idmap even if name lookup fails:

  Any resources following a resource with a spec but no actual values
  would receive an incorrect ID in the idmap due to an accumulating offset
  error. To combat this, a dummy value is inserted in the idmap whenever
  a resource with a spec but no values is encountered.

- Optimize pruning of padding zeroes in idmaps:

  Earlier, trailing zeroes were iteratively popped from the end of each
  type block of an idmap. This commit instead tracks where to make the
  cut, and does so with a single function call.

- aapt: warn about resources which lack values:

  The resource framework assumes every resource to have a value for
  at least one valid configuration. However, if multiple resource
  directories are used (several -S options to aapt), the list of
  configurations is limited by dpi (-c option to aapt) and a resource
  is only available in discarded dpi configurations, aapt will create
  a resource entry where each configuration lack an actual value. This
  commit lets aapt emit a warning whenever this has happened.

Change-Id: Ic7451b7f4adfef5bfa6b0d7e64e057f317a2cdaa

diff --git a/ResourceTable.cpp b/ResourceTable.cpp
index 20e221d0ed5afee09e829c0217549a2c1a7d38cd..770b02797cecd0b9aca1f9a4ff362ee48dc8d2d1 100644 (file)
--- a/ResourceTable.cpp
+++ b/ResourceTable.cpp
@@ -2661,6 +2661,12 @@ status_t ResourceTable::flatten(Bundle* bundle, const sp<AaptFile>& dest)
             const bool filterable = (typeName != mipmap16);
 
             const size_t N = t != NULL ? t->getOrderedConfigs().size() : 0;
+
+            // Until a non-NO_ENTRY value has been written for a resource,
+            // that resource is invalid; validResources[i] represents
+            // the item at t->getOrderedConfigs().itemAt(i).
+            Vector<bool> validResources;
+            validResources.insertAt(false, 0, N);
             
             // First write the typeSpec chunk, containing information about
             // each resource entry in this type.
@@ -2797,6 +2803,7 @@ status_t ResourceTable::flatten(Bundle* bundle, const sp<AaptFile>& dest)
                         if (amt < 0) {
                             return amt;
                         }
+                        validResources.editItemAt(ei) = true;
                     } else {
                         index[ei] = htodl(ResTable_type::NO_ENTRY);
                     }
@@ -2807,6 +2814,14 @@ status_t ResourceTable::flatten(Bundle* bundle, const sp<AaptFile>& dest)
                     (((uint8_t*)data->editData()) + typeStart);
                 tHeader->header.size = htodl(data->getSize()-typeStart);
             }
+
+            for (size_t i = 0; i < N; ++i) {
+                if (!validResources[i]) {
+                    sp<ConfigList> c = t->getOrderedConfigs().itemAt(i);
+                    fprintf(stderr, "warning: no entries written for %s/%s\n",
+                            String8(typeName).string(), String8(c->getName()).string());
+                }
+            }
         }
 
         // Fill in the rest of the package information.