commit a3ccba6d314cb29b02d1dbda9a71427b11da936d
author Doug Zongker <dougz@google.com> Mon Aug 20 15:28:02 2012 -0700
committer Doug Zongker <dougz@google.com> Mon Aug 20 15:28:02 2012 -0700
tree 5f2a722ebb6f9c7d58da206c04e077a7685c646c
parent 5585025814418e8b692a3a38b7cff495180a74f8

add bonus data feature to imgdiff/imgpatch/applypatch

The bonus data option lets you give an additional blob of uncompressed
data to be used when constructing a patch for chunk #1 of an image.
The same blob must be available at patch time, and can be passed to
the command-line applypatch tool (this feature is not accessible from
edify scripts).

This will be used to reduce the size of recovery-from-boot patches by
storing parts of the recovery ramdisk (the UI images) on the system
partition.

Change-Id: Iac1959cdf7f5e4582f8d434e83456e483b64c02c

applypatch/applypatch.c

diff --git a/applypatch/applypatch.c b/applypatch/applypatch.c
index 488fd8c..7b8a010 100644
--- a/applypatch/applypatch.c
+++ b/applypatch/applypatch.c
@@ -39,7 +39,8 @@
                           const char* source_filename,
                           const char* target_filename,
                           const uint8_t target_sha1[SHA_DIGEST_SIZE],
-                          size_t target_size);
+                          size_t target_size,
+                          const Value* bonus_data);
 
 static int mtd_partitions_scanned = 0;
 
@@ -617,7 +618,8 @@
                size_t target_size,
                int num_patches,
                char** const patch_sha1_str,
-               Value** patch_data) {
+               Value** patch_data,
+               Value* bonus_data) {
     printf("\napplying patch to %s\n", source_filename);
 
     if (target_filename[0] == '-' &&
@@ -699,7 +701,7 @@
     int result = GenerateTarget(&source_file, source_patch_value,
                                 &copy_file, copy_patch_value,
                                 source_filename, target_filename,
-                                target_sha1, target_size);
+                                target_sha1, target_size, bonus_data);
     free(source_file.data);
     free(copy_file.data);
 
@@ -713,7 +715,8 @@
                           const char* source_filename,
                           const char* target_filename,
                           const uint8_t target_sha1[SHA_DIGEST_SIZE],
-                          size_t target_size) {
+                          size_t target_size,
+                          const Value* bonus_data) {
     int retry = 1;
     SHA_CTX ctx;
     int output;
@@ -867,7 +870,7 @@
         } else if (header_bytes_read >= 8 &&
                    memcmp(header, "IMGDIFF2", 8) == 0) {
             result = ApplyImagePatch(source_to_use->data, source_to_use->size,
-                                     patch, sink, token, &ctx);
+                                     patch, sink, token, &ctx, bonus_data);
         } else {
             printf("Unknown patch file format\n");
             return 1;