Only export public symbols.

[ Merge of http://go/wvgerrit/67923 ]

Before, all symbols were being exported in the dynamic library.  Now
only the public symbols are.  This no longer has the unit tests load
the dynamic library, so we lose testing the dynamic integration; but
the unit tests use a lot of internals, even the top-level CDM ones.

Bug: 69271232
Bug: 69548115
Test: WV unit/integration tests
Change-Id: I62919937277ec785aca1f8b36b28caa2f9d8f3ea

libwvdrmengine/cdm/util/include/file_store.h

@@ -13,11 +13,12 @@
 #include <vector>
 
 #include "disallow_copy_and_assign.h"
+#include "util_common.h"
 
 namespace wvcdm {
 
 // File class. The implementation is platform dependent.
-class File {
+class CORE_UTIL_EXPORT File {
  public:
   File() {}
   virtual ~File() {}
@@ -28,7 +29,7 @@ class File {
   CORE_DISALLOW_COPY_AND_ASSIGN(File);
 };
 
-class FileSystem {
+class CORE_UTIL_EXPORT FileSystem {
  public:
   FileSystem();
   FileSystem(const std::string& origin, void* extra_data);

libwvdrmengine/cdm/util/include/log.h

@@ -7,6 +7,8 @@
 #ifndef WVCDM_UTIL_LOG_H_
 #define WVCDM_UTIL_LOG_H_
 
+#include "util_common.h"
+
 namespace wvcdm {
 
 // Simple logging class. The implementation is platform dependent.
@@ -25,10 +27,11 @@ extern LogPriority g_cutoff;
 // This function is supplied for cases where the system layer does not
 // initialize logging.  This is also needed to initialize logging in
 // unit tests.
-void InitLogging();
+CORE_UTIL_EXPORT void InitLogging();
 
-void Log(const char* file, const char* function, int line, LogPriority level,
-         const char* fmt, ...);
+CORE_UTIL_EXPORT void Log(
+    const char* file, const char* function, int line, LogPriority level,
+    const char* fmt, ...);
 
 // Log APIs
 #ifndef LOGE

libwvdrmengine/cdm/util/include/string_conversions.h

@@ -10,23 +10,31 @@
 #include <string>
 #include <vector>
 
+#include "util_common.h"
+
 namespace wvcdm {
 
-std::vector<uint8_t> a2b_hex(const std::string& b);
-std::vector<uint8_t> a2b_hex(const std::string& label, const std::string& b);
-std::string a2bs_hex(const std::string& b);
-std::string b2a_hex(const std::vector<uint8_t>& b);
-std::string b2a_hex(const std::string& b);
-std::string Base64Encode(const std::vector<uint8_t>& bin_input);
-std::vector<uint8_t> Base64Decode(const std::string& bin_input);
-std::string Base64SafeEncode(const std::vector<uint8_t>& bin_input);
-std::string Base64SafeEncodeNoPad(const std::vector<uint8_t>& bin_input);
-std::vector<uint8_t> Base64SafeDecode(const std::string& bin_input);
-std::string HexEncode(const uint8_t* bytes, unsigned size);
-std::string IntToString(int value);
-int64_t htonll64(int64_t x);
-inline int64_t ntohll64(int64_t x) { return htonll64(x); }
-std::string BytesToString(const uint8_t* bytes, unsigned size);
+CORE_UTIL_EXPORT std::vector<uint8_t> a2b_hex(const std::string& b);
+CORE_UTIL_EXPORT std::vector<uint8_t> a2b_hex(const std::string& label,
+                                              const std::string& b);
+CORE_UTIL_EXPORT std::string a2bs_hex(const std::string& b);
+CORE_UTIL_EXPORT std::string b2a_hex(const std::vector<uint8_t>& b);
+CORE_UTIL_EXPORT std::string b2a_hex(const std::string& b);
+CORE_UTIL_EXPORT std::string Base64Encode(
+    const std::vector<uint8_t>& bin_input);
+CORE_UTIL_EXPORT std::vector<uint8_t> Base64Decode(
+    const std::string& bin_input);
+CORE_UTIL_EXPORT std::string Base64SafeEncode(
+    const std::vector<uint8_t>& bin_input);
+CORE_UTIL_EXPORT std::string Base64SafeEncodeNoPad(
+    const std::vector<uint8_t>& bin_input);
+CORE_UTIL_EXPORT std::vector<uint8_t> Base64SafeDecode(
+    const std::string& bin_input);
+CORE_UTIL_EXPORT std::string HexEncode(const uint8_t* bytes, unsigned size);
+CORE_UTIL_EXPORT std::string IntToString(int value);
+CORE_UTIL_EXPORT int64_t htonll64(int64_t x);
+CORE_UTIL_EXPORT inline int64_t ntohll64(int64_t x) { return htonll64(x); }
+CORE_UTIL_EXPORT std::string BytesToString(const uint8_t* bytes, unsigned size);
 
 }  // namespace wvcdm
 

libwvdrmengine/cdm/util/include/util_common.h

@@ -0,0 +1,22 @@
+// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
+// source code may only be used and distributed under the Widevine Master
+// License Agreement.
+
+#ifndef WVCDM_UTIL_UTIL_COMMON_H_
+#define WVCDM_UTIL_UTIL_COMMON_H_
+
+#ifdef _WIN32
+# ifdef CORE_UTIL_IMPLEMENTATION
+#  define CORE_UTIL_EXPORT __declspec(dllexport)
+# else
+#  define CORE_UTIL_EXPORT __declspec(dllimport)
+# endif
+#else
+# ifdef CORE_UTIL_IMPLEMENTATION
+#  define CORE_UTIL_EXPORT __attribute__((visibility("default")))
+# else
+#  define CORE_UTIL_EXPORT
+# endif
+#endif
+
+#endif  // WVCDM_UTIL_UTIL_COMMON_H_