Merge "Changes bsdiff to be shared library in CrOS."

bsdiff.gyp

@@ -23,12 +23,22 @@
     ],
     'include_dirs': ['include'],
   },
+  'variables': {
+    'bspatch_sources': [
+      'bspatch.cc',
+      'buffer_file.cc',
+      'extents.cc',
+      'extents_file.cc',
+      'file.cc',
+      'memory_file.cc',
+      'sink_file.cc',
+    ],
+  },
   'targets': [
     # bsdiff library
     {
       'target_name': 'libbsdiff',
-      'type': 'static_library',
-      'standalone_static_library': 1,
+      'type': 'shared_library',
       'link_settings': {
         'libraries': [
           '-lbz2',
@@ -54,21 +64,14 @@
     # bspatch library
     {
       'target_name': 'libbspatch',
-      'standalone_static_library': 1,
-      'type': 'static_library',
+      'type': 'shared_library',
       'link_settings': {
         'libraries': [
           '-lbz2',
         ],
       },
       'sources': [
-        'bspatch.cc',
-        'buffer_file.cc',
-        'extents.cc',
-        'extents_file.cc',
-        'file.cc',
-        'memory_file.cc',
-        'sink_file.cc',
+        '<@(bspatch_sources)',
       ],
     },
     # bspatch executable
@@ -86,12 +89,25 @@
   'conditions': [
     ['USE_test == 1', {
       'targets': [
+        # bspatch static library for test
+        {
+          'target_name': 'libbspatch_test',
+          'type': 'static_library',
+          'link_settings': {
+            'libraries': [
+              '-lbz2',
+            ],
+          },
+          'sources': [
+            '<@(bspatch_sources)',
+          ],
+        },
         {
           'target_name': 'bsdiff_unittest',
           'type': 'executable',
           'dependencies': [
             'libbsdiff',
-            'libbspatch',
+            'libbspatch_test',
             '../common-mk/testrunner.gyp:testrunner',
           ],
           'variables': {

include/bsdiff/bsdiff.h

@@ -15,12 +15,16 @@
 #include "divsufsort.h"
 #endif
 
+#include "bsdiff/common.h"
+
 namespace bsdiff {
 
+BSDIFF_EXPORT
 int bsdiff(const char* old_filename,
            const char* new_filename,
            const char* patch_filename);
 
+BSDIFF_EXPORT
 int bsdiff(const u_char* old_buf,
            off_t oldsize,
            const u_char* new_buf,

include/bsdiff/bspatch.h

@@ -13,12 +13,14 @@
 
 namespace bsdiff {
 
+BSDIFF_EXPORT
 int bspatch(const char* old_filename,
             const char* new_filename,
             const char* patch_filename,
             const char* old_extents,
             const char* new_extents);
 
+BSDIFF_EXPORT
 int bspatch(const char* old_filename,
             const char* new_filename,
             const uint8_t* patch_data,
@@ -26,12 +28,14 @@ int bspatch(const char* old_filename,
             const char* old_extents,
             const char* new_extents);
 
+BSDIFF_EXPORT
 int bspatch(const uint8_t* old_data,
             size_t old_size,
             const uint8_t* patch_data,
             size_t patch_size,
             const std::function<size_t(const uint8_t*, size_t)>& sink);
 
+BSDIFF_EXPORT
 int bspatch(const std::unique_ptr<FileInterface>& old_file,
             const std::unique_ptr<FileInterface>& new_file,
             const uint8_t* patch_data,

include/bsdiff/common.h

@@ -0,0 +1,14 @@
+// Copyright 2017 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef _BSDIFF_COMMON_H_
+#define _BSDIFF_COMMON_H_
+
+// We defined this export macro to avoid depending on brillo (BRILLO_EXPORT in
+// "brillo/brillo_export.h")
+#ifndef BSDIFF_EXPORT
+#define BSDIFF_EXPORT __attribute__((__visibility__("default")))
+#endif
+
+#endif  // _BSDIFF_COMMON_H_

include/bsdiff/extents_file.h

@@ -32,12 +32,12 @@
 namespace bsdiff {
 
 /* An extent, defined by an offset and a length. */
-struct ex_t {
+struct BSDIFF_EXPORT ex_t {
   off_t off;     // the extent offset; negative indicates a sparse extent.
   uint64_t len;  // the extent length.
 };
 
-class ExtentsFile : public FileInterface {
+class BSDIFF_EXPORT ExtentsFile : public FileInterface {
  public:
   // Creates an ExtentsFile based on the underlying |file| passed. The positions
   // in the ExtentsFile will be linearly mapped to the extents provided in

include/bsdiff/file_interface.h

@@ -7,9 +7,11 @@
 
 #include <sys/types.h>
 
+#include "bsdiff/common.h"
+
 namespace bsdiff {
 
-class FileInterface {
+class BSDIFF_EXPORT FileInterface {
  public:
   virtual ~FileInterface() = default;