From 512536a54a1a211a9f582e76cbf12850dc7d5466 Mon Sep 17 00:00:00 2001
From: Doug Zongker <dougz@android.com>
Date: Wed, 17 Feb 2010 16:11:44 -0800
Subject: relocate applypatch; add type system and new functions to edify

- Move applypatch to this package (from build).

- Add a rudimentary type system to edify:  instead of just returning a
  char*, functions now return a Value*, which is a struct that can
  carry different types of value (currently just STRING and BLOB).
  Convert all functions to this new scheme.

- Change the one-argument form of package_extract_file to return a
  Value of the new BLOB type.

- Add read_file() to load a local file and return a blob, and
  sha1_check() to test a blob (or string) against a set of possible
  sha1s.  read_file() uses the file-loading code from applypatch so it
  can read MTD partitions as well.

This is the start of better integration between applypatch and the
rest of edify.

b/2361316 - VZW Issue PP628: Continuous reset to Droid logo:
            framework-res.apk update failed (CR LIBtt59130)

Change-Id: Ibd038074749a4d515de1f115c498c6c589ee91e5
---
 applypatch/applypatch.h | 70 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 applypatch/applypatch.h

(limited to 'applypatch/applypatch.h')

diff --git a/applypatch/applypatch.h b/applypatch/applypatch.h
new file mode 100644
index 000000000..3cb802165
--- /dev/null
+++ b/applypatch/applypatch.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _APPLYPATCH_H
+#define _APPLYPATCH_H
+
+#include <sys/stat.h>
+#include "mincrypt/sha.h"
+
+typedef struct _Patch {
+  uint8_t sha1[SHA_DIGEST_SIZE];
+  const char* patch_filename;
+} Patch;
+
+typedef struct _FileContents {
+  uint8_t sha1[SHA_DIGEST_SIZE];
+  unsigned char* data;
+  ssize_t size;
+  struct stat st;
+} FileContents;
+
+// When there isn't enough room on the target filesystem to hold the
+// patched version of the file, we copy the original here and delete
+// it to free up space.  If the expected source file doesn't exist, or
+// is corrupted, we look to see if this file contains the bits we want
+// and use it as the source instead.
+#define CACHE_TEMP_SOURCE "/cache/saved.file"
+
+typedef ssize_t (*SinkFn)(unsigned char*, ssize_t, void*);
+
+// applypatch.c
+size_t FreeSpaceForFile(const char* filename);
+int applypatch(int argc, char** argv);
+
+// Read a file into memory; store it and its associated metadata in
+// *file.  Return 0 on success.
+int LoadFileContents(const char* filename, FileContents* file);
+void FreeFileContents(FileContents* file);
+
+// bsdiff.c
+void ShowBSDiffLicense();
+int ApplyBSDiffPatch(const unsigned char* old_data, ssize_t old_size,
+                     const char* patch_filename, ssize_t offset,
+                     SinkFn sink, void* token, SHA_CTX* ctx);
+int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size,
+                        const char* patch_filename, ssize_t patch_offset,
+                        unsigned char** new_data, ssize_t* new_size);
+
+// imgpatch.c
+int ApplyImagePatch(const unsigned char* old_data, ssize_t old_size,
+                    const char* patch_filename,
+                    SinkFn sink, void* token, SHA_CTX* ctx);
+
+// freecache.c
+int MakeFreeSpaceOnCache(size_t bytes_needed);
+
+#endif
-- 
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