Move implementation out of interface headers (#61)

tkrzw has quite a bit of code that is implemented in header files
that are supposed to be included by consuming projects.

This causes some technical issues with [weak symbols](https://en.wikipedia.org/wiki/Weak_symbol) inside
the consumer's translation units (or `.obj` files), that might fail
to be deduplicated if the consuming project uses compiler settings
different from those used by the tkrzw build system.

More importantly, however, parts of the code, especially imlementations
of non-virtual functions, might end up being embedded into consumer
applications when an optimization phase eliminates the procedure
calls, raising many concerns considering licensing.

This commit moves all implementations from header files documented
for inclusion into third-party projects on https://dbmx.net/tkrzw/,
as well as any header that implicitly gets included by including a
tkrzw interface header into source files.
Further, `inline` declarations are removed as within tkrzw, the
inlining happens on the discredition of the linker independed of
the `inline` keyword, while cross-module inlining is what this
commit is supposed to interdict.

Nothing can be done about template code in tkrzw_lib_common.h ,
however, template code is whitelisted on GPLv3.

VCMakefile

@@ -20,7 +20,7 @@ LIBEXECDIR = $(BASEDIR)\bin
 HEADERFILES = tkrzw_lib_common.h tkrzw_str_util.h tkrzw_hash_util.h tkrzw_time_util.h tkrzw_thread_util.h tkrzw_logger.h tkrzw_compress.h tkrzw_containers.h tkrzw_key_comparators.h tkrzw_file.h tkrzw_file_util.h tkrzw_file_std.h tkrzw_file_mmap.h tkrzw_file_pos.h tkrzw_file_poly.h tkrzw_message_queue.h tkrzw_dbm.h tkrzw_dbm_ulog.h tkrzw_dbm_common_impl.h tkrzw_dbm_hash_impl.h tkrzw_dbm_hash.h tkrzw_dbm_tree_impl.h tkrzw_dbm_tree.h tkrzw_dbm_skip_impl.h tkrzw_dbm_skip.h tkrzw_dbm_tiny.h tkrzw_dbm_baby.h tkrzw_dbm_cache.h tkrzw_dbm_std.h tkrzw_dbm_poly.h tkrzw_dbm_shard.h tkrzw_dbm_async.h tkrzw_index.h tkrzw_cmd_util.h tkrzw_langc.h
 IMPLHEADERFILES = tkrzw_sys_config.h tkrzw_sys_util_windows.h tkrzw_sys_file_mmap_std.h tkrzw_sys_file_mmap_windows.h tkrzw_sys_file_pos_std.h tkrzw_sys_file_pos_windows.h tkrzw_sys_compress_aes.h
 LIBRARYFILES = tkrzw.lib
-LIBOBJFILES = tkrzw_lib_common.obj tkrzw_str_util.obj tkrzw_hash_util.obj tkrzw_time_util.obj tkrzw_compress.obj tkrzw_file_util.obj tkrzw_file_std.obj tkrzw_file_mmap.obj tkrzw_file_pos.obj tkrzw_file_poly.obj tkrzw_message_queue.obj tkrzw_dbm.obj tkrzw_dbm_ulog.obj tkrzw_dbm_common_impl.obj tkrzw_dbm_hash_impl.obj tkrzw_dbm_hash.obj tkrzw_dbm_tree_impl.obj tkrzw_dbm_tree.obj tkrzw_dbm_skip_impl.obj tkrzw_dbm_skip.obj tkrzw_dbm_tiny.obj tkrzw_dbm_baby.obj tkrzw_dbm_cache.obj tkrzw_dbm_std.obj tkrzw_dbm_poly.obj tkrzw_dbm_shard.obj tkrzw_dbm_async.obj tkrzw_cmd_util.obj tkrzw_langc.obj
+LIBOBJFILES = tkrzw_lib_common.obj tkrzw_str_util.obj tkrzw_hash_util.obj tkrzw_time_util.obj tkrzw_compress.obj tkrzw_key_comparators.obj tkrzw_file.obj tkrzw_file_util.obj tkrzw_file_std.obj tkrzw_file_mmap.obj tkrzw_file_pos.obj tkrzw_file_poly.obj tkrzw_message_queue.obj tkrzw_dbm.obj tkrzw_dbm_ulog.obj tkrzw_dbm_common_impl.obj tkrzw_dbm_hash_impl.obj tkrzw_dbm_hash.obj tkrzw_dbm_tree_impl.obj tkrzw_dbm_tree.obj tkrzw_dbm_skip_impl.obj tkrzw_dbm_skip.obj tkrzw_dbm_tiny.obj tkrzw_dbm_baby.obj tkrzw_dbm_cache.obj tkrzw_dbm_std.obj tkrzw_dbm_poly.obj tkrzw_dbm_shard.obj tkrzw_dbm_async.obj tkrzw_cmd_util.obj tkrzw_langc.obj
 COMMANDFILES = tkrzw_build_util.exe tkrzw_str_perf.exe tkrzw_file_perf.exe tkrzw_dbm_util.exe tkrzw_dbm_perf.exe tkrzw_dbm_tran.exe tkrzw_ulog_util.exe tkrzw_langc_check.exe
 CMDLIBRARIES = tkrzw.lib
 EXTRALIBRARIES =

configure

@@ -2142,7 +2142,7 @@ MYLIBFMT=0
 # Targets
 MYHEADERFILES="tkrzw_lib_common.h tkrzw_str_util.h tkrzw_hash_util.h tkrzw_time_util.h tkrzw_thread_util.h tkrzw_logger.h tkrzw_compress.h tkrzw_containers.h tkrzw_key_comparators.h tkrzw_file.h tkrzw_file_util.h tkrzw_file_std.h tkrzw_file_mmap.h tkrzw_file_pos.h tkrzw_file_poly.h tkrzw_message_queue.h tkrzw_dbm.h tkrzw_dbm_ulog.h tkrzw_dbm_common_impl.h tkrzw_dbm_hash_impl.h tkrzw_dbm_hash.h tkrzw_dbm_tree_impl.h tkrzw_dbm_tree.h tkrzw_dbm_skip_impl.h tkrzw_dbm_skip.h tkrzw_dbm_tiny.h tkrzw_dbm_baby.h tkrzw_dbm_cache.h tkrzw_dbm_std.h tkrzw_dbm_poly.h tkrzw_dbm_shard.h tkrzw_dbm_async.h tkrzw_index.h tkrzw_cmd_util.h tkrzw_langc.h"
 MYLIBRARYFILES="libtkrzw.a"
-MYLIBOBJFILES="tkrzw_lib_common.o tkrzw_str_util.o tkrzw_hash_util.o tkrzw_time_util.o tkrzw_compress.o tkrzw_file_util.o tkrzw_file_std.o tkrzw_file_mmap.o tkrzw_file_pos.o tkrzw_file_poly.o tkrzw_message_queue.o tkrzw_dbm.o tkrzw_dbm_ulog.o tkrzw_dbm_common_impl.o tkrzw_dbm_hash_impl.o tkrzw_dbm_hash.o tkrzw_dbm_tree_impl.o tkrzw_dbm_tree.o tkrzw_dbm_skip_impl.o tkrzw_dbm_skip.o tkrzw_dbm_tiny.o tkrzw_dbm_baby.o tkrzw_dbm_cache.o tkrzw_dbm_std.o tkrzw_dbm_poly.o tkrzw_dbm_shard.o tkrzw_dbm_async.o tkrzw_cmd_util.o tkrzw_langc.o"
+MYLIBOBJFILES="tkrzw_lib_common.o tkrzw_str_util.o tkrzw_hash_util.o tkrzw_time_util.o tkrzw_compress.o tkrzw_key_comparators.o tkrzw_file.o tkrzw_file_util.o tkrzw_file_std.o tkrzw_file_mmap.o tkrzw_file_pos.o tkrzw_file_poly.o tkrzw_message_queue.o tkrzw_dbm.o tkrzw_dbm_ulog.o tkrzw_dbm_common_impl.o tkrzw_dbm_hash_impl.o tkrzw_dbm_hash.o tkrzw_dbm_tree_impl.o tkrzw_dbm_tree.o tkrzw_dbm_skip_impl.o tkrzw_dbm_skip.o tkrzw_dbm_tiny.o tkrzw_dbm_baby.o tkrzw_dbm_cache.o tkrzw_dbm_std.o tkrzw_dbm_poly.o tkrzw_dbm_shard.o tkrzw_dbm_async.o tkrzw_cmd_util.o tkrzw_langc.o"
 MYCOMMANDFILES="tkrzw_build_util tkrzw_str_perf tkrzw_file_perf tkrzw_dbm_util tkrzw_dbm_perf tkrzw_dbm_tran tkrzw_ulog_util tkrzw_langc_check"
 MYTESTFILES="tkrzw_sys_config_test tkrzw_lib_common_test tkrzw_str_util_test tkrzw_hash_util_test tkrzw_time_util_test tkrzw_thread_util_test tkrzw_logger_test tkrzw_compress_test tkrzw_containers_test tkrzw_key_comparators_test tkrzw_file_util_test tkrzw_file_std_test tkrzw_file_mmap_test tkrzw_file_pos_test tkrzw_file_poly_test tkrzw_message_queue_test tkrzw_dbm_common_impl_test tkrzw_dbm_ulog_test tkrzw_dbm_hash_impl_test tkrzw_dbm_tree_impl_test tkrzw_dbm_tree_test tkrzw_dbm_hash_test tkrzw_dbm_skip_impl_test tkrzw_dbm_skip_test tkrzw_dbm_tiny_test tkrzw_dbm_baby_test tkrzw_dbm_cache_test tkrzw_dbm_std_test tkrzw_dbm_poly_test tkrzw_dbm_shard_test tkrzw_dbm_async_test tkrzw_index_test tkrzw_cmd_util_test tkrzw_langc_test"
 MYPCFILES="tkrzw.pc"

configure.in

@@ -15,7 +15,7 @@ MYLIBFMT=0
 # Targets
 MYHEADERFILES="tkrzw_lib_common.h tkrzw_str_util.h tkrzw_hash_util.h tkrzw_time_util.h tkrzw_thread_util.h tkrzw_logger.h tkrzw_compress.h tkrzw_containers.h tkrzw_key_comparators.h tkrzw_file.h tkrzw_file_util.h tkrzw_file_std.h tkrzw_file_mmap.h tkrzw_file_pos.h tkrzw_file_poly.h tkrzw_message_queue.h tkrzw_dbm.h tkrzw_dbm_ulog.h tkrzw_dbm_common_impl.h tkrzw_dbm_hash_impl.h tkrzw_dbm_hash.h tkrzw_dbm_tree_impl.h tkrzw_dbm_tree.h tkrzw_dbm_skip_impl.h tkrzw_dbm_skip.h tkrzw_dbm_tiny.h tkrzw_dbm_baby.h tkrzw_dbm_cache.h tkrzw_dbm_std.h tkrzw_dbm_poly.h tkrzw_dbm_shard.h tkrzw_dbm_async.h tkrzw_index.h tkrzw_cmd_util.h tkrzw_langc.h"
 MYLIBRARYFILES="libtkrzw.a"
-MYLIBOBJFILES="tkrzw_lib_common.o tkrzw_str_util.o tkrzw_hash_util.o tkrzw_time_util.o tkrzw_compress.o tkrzw_file_util.o tkrzw_file_std.o tkrzw_file_mmap.o tkrzw_file_pos.o tkrzw_file_poly.o tkrzw_message_queue.o tkrzw_dbm.o tkrzw_dbm_ulog.o tkrzw_dbm_common_impl.o tkrzw_dbm_hash_impl.o tkrzw_dbm_hash.o tkrzw_dbm_tree_impl.o tkrzw_dbm_tree.o tkrzw_dbm_skip_impl.o tkrzw_dbm_skip.o tkrzw_dbm_tiny.o tkrzw_dbm_baby.o tkrzw_dbm_cache.o tkrzw_dbm_std.o tkrzw_dbm_poly.o tkrzw_dbm_shard.o tkrzw_dbm_async.o tkrzw_cmd_util.o tkrzw_langc.o"
+MYLIBOBJFILES="tkrzw_lib_common.o tkrzw_str_util.o tkrzw_hash_util.o tkrzw_time_util.o tkrzw_compress.o tkrzw_key_comparators.o tkrzw_file.o tkrzw_file_util.o tkrzw_file_std.o tkrzw_file_mmap.o tkrzw_file_pos.o tkrzw_file_poly.o tkrzw_message_queue.o tkrzw_dbm.o tkrzw_dbm_ulog.o tkrzw_dbm_common_impl.o tkrzw_dbm_hash_impl.o tkrzw_dbm_tree_impl.o tkrzw_dbm_tree.o tkrzw_dbm_skip_impl.o tkrzw_dbm_skip.o tkrzw_dbm_tiny.o tkrzw_dbm_baby.o tkrzw_dbm_cache.o tkrzw_dbm_std.o tkrzw_dbm_poly.o tkrzw_dbm_shard.o tkrzw_dbm_async.o tkrzw_cmd_util.o tkrzw_langc.o"
 MYCOMMANDFILES="tkrzw_build_util tkrzw_str_perf tkrzw_file_perf tkrzw_dbm_util tkrzw_dbm_perf tkrzw_dbm_tran tkrzw_ulog_util tkrzw_langc_check"
 MYTESTFILES="tkrzw_sys_config_test tkrzw_lib_common_test tkrzw_str_util_test tkrzw_hash_util_test tkrzw_time_util_test tkrzw_thread_util_test tkrzw_logger_test tkrzw_compress_test tkrzw_containers_test tkrzw_key_comparators_test tkrzw_file_util_test tkrzw_file_std_test tkrzw_file_mmap_test tkrzw_file_pos_test tkrzw_file_poly_test tkrzw_message_queue_test tkrzw_dbm_common_impl_test tkrzw_dbm_ulog_test tkrzw_dbm_hash_impl_test tkrzw_dbm_tree_impl_test tkrzw_dbm_tree_test tkrzw_dbm_hash_test tkrzw_dbm_skip_impl_test tkrzw_dbm_skip_test tkrzw_dbm_tiny_test tkrzw_dbm_baby_test tkrzw_dbm_cache_test tkrzw_dbm_std_test tkrzw_dbm_poly_test tkrzw_dbm_shard_test tkrzw_dbm_async_test tkrzw_index_test tkrzw_cmd_util_test tkrzw_langc_test"
 MYPCFILES="tkrzw.pc"

tkrzw_compress.cc

@@ -45,6 +45,12 @@ extern "C" {
 
 namespace tkrzw {
 
+const std::type_info& Compressor::GetType() const {
+  const auto& entity = *this;
+  return typeid(entity);
+}
+
+
 DummyCompressor::DummyCompressor(bool checksum) : checksum_(checksum) {}
 
 DummyCompressor::~DummyCompressor() {}

tkrzw_compress.h

@@ -75,10 +75,7 @@ class Compressor {
    * Gets the type information of the actual class.
    * @return The type information of the actual class.
    */
-  const std::type_info& GetType() const {
-    const auto& entity = *this;
-    return typeid(entity);
-  }
+  const std::type_info& GetType() const;
 };
 
 /**