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Small fixes.

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Details:
* Fix shared library building.
* Reorganize linking commands so flags like --as-needed can be passed.
* C binding exports version numbers.
* Fix small typos in documention.
This commit is contained in:
Sanjay Ghemawat 2012-10-16 16:17:53 -07:00
parent 946e5b5a4c
commit 40768657bc
9 changed files with 70 additions and 45 deletions
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52
Makefile
View File

@ -2,9 +2,6 @@
# Use of this source code is governed by a BSD-style license that can be # Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file. See the AUTHORS file for names of contributors. # found in the LICENSE file. See the AUTHORS file for names of contributors.
# Inherit some settings from environment variables, if available
INSTALL_PATH ?= $(CURDIR)
#----------------------------------------------- #-----------------------------------------------
# Uncomment exactly one of the lines labelled (A), (B), and (C) below # Uncomment exactly one of the lines labelled (A), (B), and (C) below
# to switch between compilation modes. # to switch between compilation modes.
@ -24,6 +21,7 @@ CFLAGS += -I. -I./include $(PLATFORM_CCFLAGS) $(OPT)
CXXFLAGS += -I. -I./include $(PLATFORM_CXXFLAGS) $(OPT) CXXFLAGS += -I. -I./include $(PLATFORM_CXXFLAGS) $(OPT)
LDFLAGS += $(PLATFORM_LDFLAGS) LDFLAGS += $(PLATFORM_LDFLAGS)
LIBS += $(PLATFORM_LIBS)
LIBOBJECTS = $(SOURCES:.cc=.o) LIBOBJECTS = $(SOURCES:.cc=.o)
MEMENVOBJECTS = $(MEMENV_SOURCES:.cc=.o) MEMENVOBJECTS = $(MEMENV_SOURCES:.cc=.o)
@ -71,7 +69,7 @@ SHARED = $(SHARED1)
else else
# Update db.h if you change these. # Update db.h if you change these.
SHARED_MAJOR = 1 SHARED_MAJOR = 1
SHARED_MINOR = 6 SHARED_MINOR = 7
SHARED1 = libleveldb.$(PLATFORM_SHARED_EXT) SHARED1 = libleveldb.$(PLATFORM_SHARED_EXT)
SHARED2 = $(SHARED1).$(SHARED_MAJOR) SHARED2 = $(SHARED1).$(SHARED_MAJOR)
SHARED3 = $(SHARED1).$(SHARED_MAJOR).$(SHARED_MINOR) SHARED3 = $(SHARED1).$(SHARED_MAJOR).$(SHARED_MINOR)
@ -83,7 +81,7 @@ $(SHARED2): $(SHARED3)
endif endif
$(SHARED3): $(SHARED3):
$(CXX) $(SOURCES) $(LDFLAGS) $(PLATFORM_SHARED_LDFLAGS)$(INSTALL_PATH)$(SHARED2) $(CXXFLAGS) $(PLATFORM_SHARED_CFLAGS) -o $(SHARED3) $(CXX) $(LDFLAGS) $(PLATFORM_SHARED_LDFLAGS)$(SHARED2) $(CXXFLAGS) $(PLATFORM_SHARED_CFLAGS) $(SOURCES) -o $(SHARED3) $(LIBS)
endif # PLATFORM_SHARED_EXT endif # PLATFORM_SHARED_EXT
@ -101,74 +99,74 @@ $(LIBRARY): $(LIBOBJECTS)
$(AR) -rs $@ $(LIBOBJECTS) $(AR) -rs $@ $(LIBOBJECTS)
db_bench: db/db_bench.o $(LIBOBJECTS) $(TESTUTIL) db_bench: db/db_bench.o $(LIBOBJECTS) $(TESTUTIL)
$(CXX) db/db_bench.o $(LIBOBJECTS) $(TESTUTIL) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/db_bench.o $(LIBOBJECTS) $(TESTUTIL) -o $@ $(LIBS)
db_bench_sqlite3: doc/bench/db_bench_sqlite3.o $(LIBOBJECTS) $(TESTUTIL) db_bench_sqlite3: doc/bench/db_bench_sqlite3.o $(LIBOBJECTS) $(TESTUTIL)
$(CXX) doc/bench/db_bench_sqlite3.o $(LIBOBJECTS) $(TESTUTIL) -o $@ $(LDFLAGS) -lsqlite3 $(CXX) $(LDFLAGS) doc/bench/db_bench_sqlite3.o $(LIBOBJECTS) $(TESTUTIL) -o $@ -lsqlite3 $(LIBS)
db_bench_tree_db: doc/bench/db_bench_tree_db.o $(LIBOBJECTS) $(TESTUTIL) db_bench_tree_db: doc/bench/db_bench_tree_db.o $(LIBOBJECTS) $(TESTUTIL)
$(CXX) doc/bench/db_bench_tree_db.o $(LIBOBJECTS) $(TESTUTIL) -o $@ $(LDFLAGS) -lkyotocabinet $(CXX) $(LDFLAGS) doc/bench/db_bench_tree_db.o $(LIBOBJECTS) $(TESTUTIL) -o $@ -lkyotocabinet $(LIBS)
arena_test: util/arena_test.o $(LIBOBJECTS) $(TESTHARNESS) arena_test: util/arena_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) util/arena_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) util/arena_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
bloom_test: util/bloom_test.o $(LIBOBJECTS) $(TESTHARNESS) bloom_test: util/bloom_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) util/bloom_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) util/bloom_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
c_test: db/c_test.o $(LIBOBJECTS) $(TESTHARNESS) c_test: db/c_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/c_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/c_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
cache_test: util/cache_test.o $(LIBOBJECTS) $(TESTHARNESS) cache_test: util/cache_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) util/cache_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) util/cache_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
coding_test: util/coding_test.o $(LIBOBJECTS) $(TESTHARNESS) coding_test: util/coding_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) util/coding_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) util/coding_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
corruption_test: db/corruption_test.o $(LIBOBJECTS) $(TESTHARNESS) corruption_test: db/corruption_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/corruption_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/corruption_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
crc32c_test: util/crc32c_test.o $(LIBOBJECTS) $(TESTHARNESS) crc32c_test: util/crc32c_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) util/crc32c_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) util/crc32c_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
db_test: db/db_test.o $(LIBOBJECTS) $(TESTHARNESS) db_test: db/db_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/db_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/db_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
dbformat_test: db/dbformat_test.o $(LIBOBJECTS) $(TESTHARNESS) dbformat_test: db/dbformat_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/dbformat_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/dbformat_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
env_test: util/env_test.o $(LIBOBJECTS) $(TESTHARNESS) env_test: util/env_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) util/env_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) util/env_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
filename_test: db/filename_test.o $(LIBOBJECTS) $(TESTHARNESS) filename_test: db/filename_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/filename_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/filename_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
filter_block_test: table/filter_block_test.o $(LIBOBJECTS) $(TESTHARNESS) filter_block_test: table/filter_block_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) table/filter_block_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) table/filter_block_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
log_test: db/log_test.o $(LIBOBJECTS) $(TESTHARNESS) log_test: db/log_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/log_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/log_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
table_test: table/table_test.o $(LIBOBJECTS) $(TESTHARNESS) table_test: table/table_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) table/table_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) table/table_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
skiplist_test: db/skiplist_test.o $(LIBOBJECTS) $(TESTHARNESS) skiplist_test: db/skiplist_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/skiplist_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/skiplist_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
version_edit_test: db/version_edit_test.o $(LIBOBJECTS) $(TESTHARNESS) version_edit_test: db/version_edit_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/version_edit_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/version_edit_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
version_set_test: db/version_set_test.o $(LIBOBJECTS) $(TESTHARNESS) version_set_test: db/version_set_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/version_set_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/version_set_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
write_batch_test: db/write_batch_test.o $(LIBOBJECTS) $(TESTHARNESS) write_batch_test: db/write_batch_test.o $(LIBOBJECTS) $(TESTHARNESS)
$(CXX) db/write_batch_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) db/write_batch_test.o $(LIBOBJECTS) $(TESTHARNESS) -o $@ $(LIBS)
$(MEMENVLIBRARY) : $(MEMENVOBJECTS) $(MEMENVLIBRARY) : $(MEMENVOBJECTS)
rm -f $@ rm -f $@
$(AR) -rs $@ $(MEMENVOBJECTS) $(AR) -rs $@ $(MEMENVOBJECTS)
memenv_test : helpers/memenv/memenv_test.o $(MEMENVLIBRARY) $(LIBRARY) $(TESTHARNESS) memenv_test : helpers/memenv/memenv_test.o $(MEMENVLIBRARY) $(LIBRARY) $(TESTHARNESS)
$(CXX) helpers/memenv/memenv_test.o $(MEMENVLIBRARY) $(LIBRARY) $(TESTHARNESS) -o $@ $(LDFLAGS) $(CXX) $(LDFLAGS) helpers/memenv/memenv_test.o $(MEMENVLIBRARY) $(LIBRARY) $(TESTHARNESS) -o $@ $(LIBS)
ifeq ($(PLATFORM), IOS) ifeq ($(PLATFORM), IOS)
# For iOS, create universal object files to be used on both the simulator and # For iOS, create universal object files to be used on both the simulator and

20
build_detect_platform
View File

@ -7,8 +7,11 @@
# CC C Compiler path # CC C Compiler path
# CXX C++ Compiler path # CXX C++ Compiler path
# PLATFORM_LDFLAGS Linker flags # PLATFORM_LDFLAGS Linker flags
# PLATFORM_LIBS Libraries flags
# PLATFORM_SHARED_EXT Extension for shared libraries # PLATFORM_SHARED_EXT Extension for shared libraries
# PLATFORM_SHARED_LDFLAGS Flags for building shared library # PLATFORM_SHARED_LDFLAGS Flags for building shared library
# This flag is embedded just before the name
# of the shared library without intervening spaces
# PLATFORM_SHARED_CFLAGS Flags for compiling objects for shared library # PLATFORM_SHARED_CFLAGS Flags for compiling objects for shared library
# PLATFORM_CCFLAGS C compiler flags # PLATFORM_CCFLAGS C compiler flags
# PLATFORM_CXXFLAGS C++ compiler flags. Will contain: # PLATFORM_CXXFLAGS C++ compiler flags. Will contain:
@ -51,6 +54,7 @@ CROSS_COMPILE=
PLATFORM_CCFLAGS= PLATFORM_CCFLAGS=
PLATFORM_CXXFLAGS= PLATFORM_CXXFLAGS=
PLATFORM_LDFLAGS= PLATFORM_LDFLAGS=
PLATFORM_LIBS=
PLATFORM_SHARED_EXT="so" PLATFORM_SHARED_EXT="so"
PLATFORM_SHARED_LDFLAGS="-shared -Wl,-soname -Wl," PLATFORM_SHARED_LDFLAGS="-shared -Wl,-soname -Wl,"
PLATFORM_SHARED_CFLAGS="-fPIC" PLATFORM_SHARED_CFLAGS="-fPIC"
@ -68,7 +72,8 @@ case "$TARGET_OS" in
PLATFORM=OS_MACOSX PLATFORM=OS_MACOSX
COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX" COMMON_FLAGS="$MEMCMP_FLAG -DOS_MACOSX"
PLATFORM_SHARED_EXT=dylib PLATFORM_SHARED_EXT=dylib
PLATFORM_SHARED_LDFLAGS="-dynamiclib -install_name " [ -z "$INSTALL_PATH" ] && INSTALL_PATH=`pwd`
PLATFORM_SHARED_LDFLAGS="-dynamiclib -install_name $INSTALL_PATH/"
PORT_FILE=port/port_posix.cc PORT_FILE=port/port_posix.cc
;; ;;
Linux) Linux)
@ -80,19 +85,19 @@ case "$TARGET_OS" in
SunOS) SunOS)
PLATFORM=OS_SOLARIS PLATFORM=OS_SOLARIS
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_SOLARIS" COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_SOLARIS"
PLATFORM_LDFLAGS="-lpthread -lrt" PLATFORM_LIBS="-lpthread -lrt"
PORT_FILE=port/port_posix.cc PORT_FILE=port/port_posix.cc
;; ;;
FreeBSD) FreeBSD)
PLATFORM=OS_FREEBSD PLATFORM=OS_FREEBSD
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_FREEBSD" COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_FREEBSD"
PLATFORM_LDFLAGS="-lpthread" PLATFORM_LIBS="-lpthread"
PORT_FILE=port/port_posix.cc PORT_FILE=port/port_posix.cc
;; ;;
NetBSD) NetBSD)
PLATFORM=OS_NETBSD PLATFORM=OS_NETBSD
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_NETBSD" COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_NETBSD"
PLATFORM_LDFLAGS="-lpthread -lgcc_s" PLATFORM_LIBS="-lpthread -lgcc_s"
PORT_FILE=port/port_posix.cc PORT_FILE=port/port_posix.cc
;; ;;
OpenBSD) OpenBSD)
@ -104,7 +109,7 @@ case "$TARGET_OS" in
DragonFly) DragonFly)
PLATFORM=OS_DRAGONFLYBSD PLATFORM=OS_DRAGONFLYBSD
COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_DRAGONFLYBSD" COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_DRAGONFLYBSD"
PLATFORM_LDFLAGS="-lpthread" PLATFORM_LIBS="-lpthread"
PORT_FILE=port/port_posix.cc PORT_FILE=port/port_posix.cc
;; ;;
OS_ANDROID_CROSSCOMPILE) OS_ANDROID_CROSSCOMPILE)
@ -169,7 +174,7 @@ EOF
EOF EOF
if [ "$?" = 0 ]; then if [ "$?" = 0 ]; then
COMMON_FLAGS="$COMMON_FLAGS -DSNAPPY" COMMON_FLAGS="$COMMON_FLAGS -DSNAPPY"
PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -lsnappy" PLATFORM_LIBS="$PLATFORM_LIBS -lsnappy"
fi fi
# Test whether tcmalloc is available # Test whether tcmalloc is available
@ -177,7 +182,7 @@ EOF
int main() {} int main() {}
EOF EOF
if [ "$?" = 0 ]; then if [ "$?" = 0 ]; then
PLATFORM_LDFLAGS="$PLATFORM_LDFLAGS -ltcmalloc" PLATFORM_LIBS="$PLATFORM_LIBS -ltcmalloc"
fi fi
fi fi
@ -188,6 +193,7 @@ echo "CC=$CC" >> $OUTPUT
echo "CXX=$CXX" >> $OUTPUT echo "CXX=$CXX" >> $OUTPUT
echo "PLATFORM=$PLATFORM" >> $OUTPUT echo "PLATFORM=$PLATFORM" >> $OUTPUT
echo "PLATFORM_LDFLAGS=$PLATFORM_LDFLAGS" >> $OUTPUT echo "PLATFORM_LDFLAGS=$PLATFORM_LDFLAGS" >> $OUTPUT
echo "PLATFORM_LIBS=$PLATFORM_LIBS" >> $OUTPUT
echo "PLATFORM_CCFLAGS=$PLATFORM_CCFLAGS" >> $OUTPUT echo "PLATFORM_CCFLAGS=$PLATFORM_CCFLAGS" >> $OUTPUT
echo "PLATFORM_CXXFLAGS=$PLATFORM_CXXFLAGS" >> $OUTPUT echo "PLATFORM_CXXFLAGS=$PLATFORM_CXXFLAGS" >> $OUTPUT
echo "PLATFORM_SHARED_CFLAGS=$PLATFORM_SHARED_CFLAGS" >> $OUTPUT echo "PLATFORM_SHARED_CFLAGS=$PLATFORM_SHARED_CFLAGS" >> $OUTPUT

10
db/c.cc
View File

@ -24,6 +24,8 @@ using leveldb::Env;
using leveldb::FileLock; using leveldb::FileLock;
using leveldb::FilterPolicy; using leveldb::FilterPolicy;
using leveldb::Iterator; using leveldb::Iterator;
using leveldb::kMajorVersion;
using leveldb::kMinorVersion;
using leveldb::Logger; using leveldb::Logger;
using leveldb::NewBloomFilterPolicy; using leveldb::NewBloomFilterPolicy;
using leveldb::NewLRUCache; using leveldb::NewLRUCache;
@ -582,4 +584,12 @@ void leveldb_free(void* ptr) {
free(ptr); free(ptr);
} }
int leveldb_major_version() {
return kMajorVersion;
}
int leveldb_minor_version() {
return kMinorVersion;
}
} // end extern "C" } // end extern "C"

3
db/c_test.c
View File

@ -165,6 +165,9 @@ int main(int argc, char** argv) {
char* err = NULL; char* err = NULL;
int run = -1; int run = -1;
CheckCondition(leveldb_major_version() >= 1);
CheckCondition(leveldb_minor_version() >= 1);
snprintf(dbname, sizeof(dbname), snprintf(dbname, sizeof(dbname),
"%s/leveldb_c_test-%d", "%s/leveldb_c_test-%d",
GetTempDir(), GetTempDir(),

6
doc/index.html
View File

@ -420,7 +420,7 @@ The preceding code associates a
based filtering policy with the database. Bloom filter based based filtering policy with the database. Bloom filter based
filtering relies on keeping some number of bits of data in memory per filtering relies on keeping some number of bits of data in memory per
key (in this case 10 bits per key since that is the argument we passed key (in this case 10 bits per key since that is the argument we passed
to NewBloomFilter). This filter will reduce the number of unnecessary to NewBloomFilterPolicy). This filter will reduce the number of unnecessary
disk reads needed for <code>Get()</code> calls by a factor of disk reads needed for <code>Get()</code> calls by a factor of
approximately a 100. Increasing the bits per key will lead to a approximately a 100. Increasing the bits per key will lead to a
larger reduction at the cost of more memory usage. We recommend that larger reduction at the cost of more memory usage. We recommend that
@ -430,7 +430,7 @@ lot of random reads set a filter policy.
If you are using a custom comparator, you should ensure that the filter If you are using a custom comparator, you should ensure that the filter
policy you are using is compatible with your comparator. For example, policy you are using is compatible with your comparator. For example,
consider a comparator that ignores trailing spaces when comparing keys. consider a comparator that ignores trailing spaces when comparing keys.
<code>NewBloomFilter</code> must not be used with such a comparator. <code>NewBloomFilterPolicy</code> must not be used with such a comparator.
Instead, the application should provide a custom filter policy that Instead, the application should provide a custom filter policy that
also ignores trailing spaces. For example: also ignores trailing spaces. For example:
<pre> <pre>
@ -438,7 +438,7 @@ also ignores trailing spaces. For example:
private: private:
FilterPolicy* builtin_policy_; FilterPolicy* builtin_policy_;
public: public:
CustomFilterPolicy() : builtin_policy_(NewBloomFilter(10)) { } CustomFilterPolicy() : builtin_policy_(NewBloomFilterPolicy(10)) { }
~CustomFilterPolicy() { delete builtin_policy_; } ~CustomFilterPolicy() { delete builtin_policy_; }
const char* Name() const { return "IgnoreTrailingSpacesFilter"; } const char* Name() const { return "IgnoreTrailingSpacesFilter"; }

4
doc/log_format.txt
View File

@ -4,8 +4,8 @@ exception is that the tail of the file may contain a partial block.
Each block consists of a sequence of records: Each block consists of a sequence of records:
block := record* trailer? block := record* trailer?
record := record :=
checksum: uint32 // crc32c of type and data[] checksum: uint32 // crc32c of type and data[] ; little-endian
length: uint16 length: uint16 // little-endian
type: uint8 // One of FULL, FIRST, MIDDLE, LAST type: uint8 // One of FULL, FIRST, MIDDLE, LAST
data: uint8[length] data: uint8[length]

12
doc/table_format.txt
View File

@ -18,6 +18,8 @@ The file contains internal pointers. Each such pointer is called
a BlockHandle and contains the following information: a BlockHandle and contains the following information:
offset: varint64 offset: varint64
size: varint64 size: varint64
See https://developers.google.com/protocol-buffers/docs/encoding#varints
for an explanation of varint64 format.
(1) The sequence of key/value pairs in the file are stored in sorted (1) The sequence of key/value pairs in the file are stored in sorted
order and partitioned into a sequence of data blocks. These blocks order and partitioned into a sequence of data blocks. These blocks
@ -41,11 +43,11 @@ BlockHandle for the data block.
(6) At the very end of the file is a fixed length footer that contains (6) At the very end of the file is a fixed length footer that contains
the BlockHandle of the metaindex and index blocks as well as a magic number. the BlockHandle of the metaindex and index blocks as well as a magic number.
metaindex_handle: char[p]; // Block handle for metaindex metaindex_handle: char[p]; // Block handle for metaindex
index_handle: char[q]; // Block handle for index index_handle: char[q]; // Block handle for index
padding: char[40-p-q]; // 0 bytes to make fixed length padding: char[40-p-q]; // zeroed bytes to make fixed length
// (40==2*BlockHandle::kMaxEncodedLength) // (40==2*BlockHandle::kMaxEncodedLength)
magic: fixed64; // == 0xdb4775248b80fb57 magic: fixed64; // == 0xdb4775248b80fb57 (little-endian)
"filter" Meta Block "filter" Meta Block
------------------- -------------------

6
include/leveldb/c.h
View File

@ -278,6 +278,12 @@ extern void leveldb_env_destroy(leveldb_env_t*);
malloc()-ed memory returned by this library. */ malloc()-ed memory returned by this library. */
extern void leveldb_free(void* ptr); extern void leveldb_free(void* ptr);
/* Return the major version number for this release. */
extern int leveldb_major_version();
/* Return the minor version number for this release. */
extern int leveldb_minor_version();
#ifdef __cplusplus #ifdef __cplusplus
} /* end extern "C" */ } /* end extern "C" */
#endif #endif

2
include/leveldb/db.h
View File

@ -14,7 +14,7 @@ namespace leveldb {
// Update Makefile if you change these // Update Makefile if you change these
static const int kMajorVersion = 1; static const int kMajorVersion = 1;
static const int kMinorVersion = 6; static const int kMinorVersion = 7;
struct Options; struct Options;
struct ReadOptions; struct ReadOptions;