Support multiple resource tables with same package

In order to support APK split features, the resource
table needs to support loading multiple resource
tables with the same package but potentially new set
of type IDs.

This adds some complexity as the type ID space changes
from dense and ordered to potentially sparse.

A ByteBucketArray is used to store the type IDs in
a memory efficient way that allows for fast retrieval.

In addition, the IDMAP format has changed. We no longer
need random access to the type data, since we store the
types differently. However, random access to entries of
a given type is still required.

Change-Id: If6f5be680b405b368941d9c1f2b5d2ddca964160

cmds/idmap/create.cpp

@@ -105,7 +105,7 @@ namespace {
 
         uint32_t cached_target_crc, cached_overlay_crc;
         String8 cached_target_path, cached_overlay_path;
-        if (!ResTable::getIdmapInfo(buf, N, &cached_target_crc, &cached_overlay_crc,
+        if (!ResTable::getIdmapInfo(buf, N, NULL, &cached_target_crc, &cached_overlay_crc,
                     &cached_target_path, &cached_overlay_path)) {
             return true;
         }

cmds/idmap/idmap.cpp

@@ -66,26 +66,32 @@ EXAMPLES \n\
       Display an idmap file: \n\
 \n\
       $ adb shell idmap --inspect /data/resource-cache/vendor@overlay@overlay.apk@idmap \n\
-      SECTION      ENTRY        VALUE      OFFSET    COMMENT \n\
-      IDMAP HEADER magic        0x706d6469 0x0 \n\
-                   base crc     0x484aa77f 0x1 \n\
-                   overlay crc  0x03c66fa5 0x2 \n\
-                   base path    .......... 0x03-0x42 /system/app/target.apk \n\
-                   overlay path .......... 0x43-0x82 /vendor/overlay/overlay.apk \n\
-      DATA HEADER  types count  0x00000003 0x83 \n\
-                   padding      0x00000000 0x84 \n\
-                   type offset  0x00000004 0x85      absolute offset 0x87, xml \n\
-                   type offset  0x00000007 0x86      absolute offset 0x8a, string \n\
-      DATA BLOCK   entry count  0x00000001 0x87 \n\
-                   entry offset 0x00000000 0x88 \n\
-                   entry        0x7f020000 0x89      xml/integer \n\
-      DATA BLOCK   entry count  0x00000002 0x8a \n\
-                   entry offset 0x00000000 0x8b \n\
-                   entry        0x7f030000 0x8c      string/str \n\
-                   entry        0x7f030001 0x8d      string/str2 \n\
+      SECTION      ENTRY        VALUE      COMMENT \n\
+      IDMAP HEADER magic        0x706d6469 \n\
+                   base crc     0xb65a383f \n\
+                   overlay crc  0x7b9675e8 \n\
+                   base path    .......... /path/to/target.apk \n\
+                   overlay path .......... /path/to/overlay.apk \n\
+      DATA HEADER  target pkg   0x0000007f \n\
+                   types count  0x00000003 \n\
+      DATA BLOCK   target type  0x00000002 \n\
+                   overlay type 0x00000002 \n\
+                   entry count  0x00000001 \n\
+                   entry offset 0x00000000 \n\
+                   entry        0x00000000 drawable/drawable \n\
+      DATA BLOCK   target type  0x00000003 \n\
+                   overlay type 0x00000003 \n\
+                   entry count  0x00000001 \n\
+                   entry offset 0x00000000 \n\
+                   entry        0x00000000 xml/integer \n\
+      DATA BLOCK   target type  0x00000004 \n\
+                   overlay type 0x00000004 \n\
+                   entry count  0x00000001 \n\
+                   entry offset 0x00000000 \n\
+                   entry        0x00000000 raw/lorem_ipsum \n\
 \n\
       In this example, the overlay package provides three alternative resource values:\n\
-      xml/integer, string/str and string/str2.\n\
+      drawable/drawable, xml/integer, and raw/lorem_ipsum \n\
 \n\
 NOTES \n\
       This tool and its expected invocation from installd is modelled on dexopt.";