updater: Add LZMA support to blockimg

 * This adds support for LZMA compressed blockimages. The space savings
   from doing this is significant and will reduce our CDN costs by quite
   a bit.
 * I'll spend the saved $$$ on beer.

Change-Id: I6679220aaa29592fe6bbccd4136f0c239e45e2ae

1 files changed, 12 insertions, 0 deletions

diff --git a/minzip/Zip.h b/minzip/Zip.h
index 86d8db5..92c20a0 100644
--- a/minzip/Zip.h
+++ b/minzip/Zip.h
@@ -114,6 +114,18 @@ bool mzProcessZipEntryContents(const ZipArchive *pArchive,
     void *cookie);
 
 /*
+ * Similar to mzProcessZipEntryContents, but explicitly process the stream
+ * using XZ/LZMA before calling processFunction.
+ *
+ * This is a separate function for use by the updater. LZMA provides huge
+ * size reductions vs deflate, but isn't actually supported by the ZIP format.
+ * We need to process it using as little memory as possible.
+ */
+bool mzProcessZipEntryContentsXZ(const ZipArchive *pArchive,
+    const ZipEntry *pEntry, ProcessZipEntryContentsFunction processFunction,
+    void *cookie);
+
+/*
  * Read an entry into a buffer allocated by the caller.
  */
 bool mzReadZipEntry(const ZipArchive* pArchive, const ZipEntry* pEntry,