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-rw-r--r--db/c.cc391
1 files changed, 178 insertions, 213 deletions
diff --git a/db/c.cc b/db/c.cc
index b23e3dcc9d..3a492f9ac5 100644
--- a/db/c.cc
+++ b/db/c.cc
@@ -4,10 +4,9 @@
#include "leveldb/c.h"
-#include <stdlib.h>
-#ifndef WIN32
-#include <unistd.h>
-#endif
+#include <cstdint>
+#include <cstdlib>
+
#include "leveldb/cache.h"
#include "leveldb/comparator.h"
#include "leveldb/db.h"
@@ -45,69 +44,72 @@ using leveldb::WriteOptions;
extern "C" {
-struct leveldb_t { DB* rep; };
-struct leveldb_iterator_t { Iterator* rep; };
-struct leveldb_writebatch_t { WriteBatch rep; };
-struct leveldb_snapshot_t { const Snapshot* rep; };
-struct leveldb_readoptions_t { ReadOptions rep; };
-struct leveldb_writeoptions_t { WriteOptions rep; };
-struct leveldb_options_t { Options rep; };
-struct leveldb_cache_t { Cache* rep; };
-struct leveldb_seqfile_t { SequentialFile* rep; };
-struct leveldb_randomfile_t { RandomAccessFile* rep; };
-struct leveldb_writablefile_t { WritableFile* rep; };
-struct leveldb_logger_t { Logger* rep; };
-struct leveldb_filelock_t { FileLock* rep; };
+struct leveldb_t {
+ DB* rep;
+};
+struct leveldb_iterator_t {
+ Iterator* rep;
+};
+struct leveldb_writebatch_t {
+ WriteBatch rep;
+};
+struct leveldb_snapshot_t {
+ const Snapshot* rep;
+};
+struct leveldb_readoptions_t {
+ ReadOptions rep;
+};
+struct leveldb_writeoptions_t {
+ WriteOptions rep;
+};
+struct leveldb_options_t {
+ Options rep;
+};
+struct leveldb_cache_t {
+ Cache* rep;
+};
+struct leveldb_seqfile_t {
+ SequentialFile* rep;
+};
+struct leveldb_randomfile_t {
+ RandomAccessFile* rep;
+};
+struct leveldb_writablefile_t {
+ WritableFile* rep;
+};
+struct leveldb_logger_t {
+ Logger* rep;
+};
+struct leveldb_filelock_t {
+ FileLock* rep;
+};
struct leveldb_comparator_t : public Comparator {
- void* state_;
- void (*destructor_)(void*);
- int (*compare_)(
- void*,
- const char* a, size_t alen,
- const char* b, size_t blen);
- const char* (*name_)(void*);
+ ~leveldb_comparator_t() override { (*destructor_)(state_); }
- virtual ~leveldb_comparator_t() {
- (*destructor_)(state_);
- }
-
- virtual int Compare(const Slice& a, const Slice& b) const {
+ int Compare(const Slice& a, const Slice& b) const override {
return (*compare_)(state_, a.data(), a.size(), b.data(), b.size());
}
- virtual const char* Name() const {
- return (*name_)(state_);
- }
+ const char* Name() const override { return (*name_)(state_); }
// No-ops since the C binding does not support key shortening methods.
- virtual void FindShortestSeparator(std::string*, const Slice&) const { }
- virtual void FindShortSuccessor(std::string* key) const { }
-};
+ void FindShortestSeparator(std::string*, const Slice&) const override {}
+ void FindShortSuccessor(std::string* key) const override {}
-struct leveldb_filterpolicy_t : public FilterPolicy {
void* state_;
void (*destructor_)(void*);
+ int (*compare_)(void*, const char* a, size_t alen, const char* b,
+ size_t blen);
const char* (*name_)(void*);
- char* (*create_)(
- void*,
- const char* const* key_array, const size_t* key_length_array,
- int num_keys,
- size_t* filter_length);
- unsigned char (*key_match_)(
- void*,
- const char* key, size_t length,
- const char* filter, size_t filter_length);
-
- virtual ~leveldb_filterpolicy_t() {
- (*destructor_)(state_);
- }
+};
- virtual const char* Name() const {
- return (*name_)(state_);
- }
+struct leveldb_filterpolicy_t : public FilterPolicy {
+ ~leveldb_filterpolicy_t() override { (*destructor_)(state_); }
- virtual void CreateFilter(const Slice* keys, int n, std::string* dst) const {
+ const char* Name() const override { return (*name_)(state_); }
+
+ void CreateFilter(const Slice* keys, int n, std::string* dst) const override {
std::vector<const char*> key_pointers(n);
std::vector<size_t> key_sizes(n);
for (int i = 0; i < n; i++) {
@@ -120,10 +122,19 @@ struct leveldb_filterpolicy_t : public FilterPolicy {
free(filter);
}
- virtual bool KeyMayMatch(const Slice& key, const Slice& filter) const {
- return (*key_match_)(state_, key.data(), key.size(),
- filter.data(), filter.size());
+ bool KeyMayMatch(const Slice& key, const Slice& filter) const override {
+ return (*key_match_)(state_, key.data(), key.size(), filter.data(),
+ filter.size());
}
+
+ void* state_;
+ void (*destructor_)(void*);
+ const char* (*name_)(void*);
+ char* (*create_)(void*, const char* const* key_array,
+ const size_t* key_length_array, int num_keys,
+ size_t* filter_length);
+ uint8_t (*key_match_)(void*, const char* key, size_t length,
+ const char* filter, size_t filter_length);
};
struct leveldb_env_t {
@@ -132,10 +143,10 @@ struct leveldb_env_t {
};
static bool SaveError(char** errptr, const Status& s) {
- assert(errptr != NULL);
+ assert(errptr != nullptr);
if (s.ok()) {
return false;
- } else if (*errptr == NULL) {
+ } else if (*errptr == nullptr) {
*errptr = strdup(s.ToString().c_str());
} else {
// TODO(sanjay): Merge with existing error?
@@ -151,13 +162,11 @@ static char* CopyString(const std::string& str) {
return result;
}
-leveldb_t* leveldb_open(
- const leveldb_options_t* options,
- const char* name,
- char** errptr) {
+leveldb_t* leveldb_open(const leveldb_options_t* options, const char* name,
+ char** errptr) {
DB* db;
if (SaveError(errptr, DB::Open(options->rep, std::string(name), &db))) {
- return NULL;
+ return nullptr;
}
leveldb_t* result = new leveldb_t;
result->rep = db;
@@ -169,40 +178,27 @@ void leveldb_close(leveldb_t* db) {
delete db;
}
-void leveldb_put(
- leveldb_t* db,
- const leveldb_writeoptions_t* options,
- const char* key, size_t keylen,
- const char* val, size_t vallen,
- char** errptr) {
+void leveldb_put(leveldb_t* db, const leveldb_writeoptions_t* options,
+ const char* key, size_t keylen, const char* val, size_t vallen,
+ char** errptr) {
SaveError(errptr,
db->rep->Put(options->rep, Slice(key, keylen), Slice(val, vallen)));
}
-void leveldb_delete(
- leveldb_t* db,
- const leveldb_writeoptions_t* options,
- const char* key, size_t keylen,
- char** errptr) {
+void leveldb_delete(leveldb_t* db, const leveldb_writeoptions_t* options,
+ const char* key, size_t keylen, char** errptr) {
SaveError(errptr, db->rep->Delete(options->rep, Slice(key, keylen)));
}
-
-void leveldb_write(
- leveldb_t* db,
- const leveldb_writeoptions_t* options,
- leveldb_writebatch_t* batch,
- char** errptr) {
+void leveldb_write(leveldb_t* db, const leveldb_writeoptions_t* options,
+ leveldb_writebatch_t* batch, char** errptr) {
SaveError(errptr, db->rep->Write(options->rep, &batch->rep));
}
-char* leveldb_get(
- leveldb_t* db,
- const leveldb_readoptions_t* options,
- const char* key, size_t keylen,
- size_t* vallen,
- char** errptr) {
- char* result = NULL;
+char* leveldb_get(leveldb_t* db, const leveldb_readoptions_t* options,
+ const char* key, size_t keylen, size_t* vallen,
+ char** errptr) {
+ char* result = nullptr;
std::string tmp;
Status s = db->rep->Get(options->rep, Slice(key, keylen), &tmp);
if (s.ok()) {
@@ -218,45 +214,40 @@ char* leveldb_get(
}
leveldb_iterator_t* leveldb_create_iterator(
- leveldb_t* db,
- const leveldb_readoptions_t* options) {
+ leveldb_t* db, const leveldb_readoptions_t* options) {
leveldb_iterator_t* result = new leveldb_iterator_t;
result->rep = db->rep->NewIterator(options->rep);
return result;
}
-const leveldb_snapshot_t* leveldb_create_snapshot(
- leveldb_t* db) {
+const leveldb_snapshot_t* leveldb_create_snapshot(leveldb_t* db) {
leveldb_snapshot_t* result = new leveldb_snapshot_t;
result->rep = db->rep->GetSnapshot();
return result;
}
-void leveldb_release_snapshot(
- leveldb_t* db,
- const leveldb_snapshot_t* snapshot) {
+void leveldb_release_snapshot(leveldb_t* db,
+ const leveldb_snapshot_t* snapshot) {
db->rep->ReleaseSnapshot(snapshot->rep);
delete snapshot;
}
-char* leveldb_property_value(
- leveldb_t* db,
- const char* propname) {
+char* leveldb_property_value(leveldb_t* db, const char* propname) {
std::string tmp;
if (db->rep->GetProperty(Slice(propname), &tmp)) {
// We use strdup() since we expect human readable output.
return strdup(tmp.c_str());
} else {
- return NULL;
+ return nullptr;
}
}
-void leveldb_approximate_sizes(
- leveldb_t* db,
- int num_ranges,
- const char* const* range_start_key, const size_t* range_start_key_len,
- const char* const* range_limit_key, const size_t* range_limit_key_len,
- uint64_t* sizes) {
+void leveldb_approximate_sizes(leveldb_t* db, int num_ranges,
+ const char* const* range_start_key,
+ const size_t* range_start_key_len,
+ const char* const* range_limit_key,
+ const size_t* range_limit_key_len,
+ uint64_t* sizes) {
Range* ranges = new Range[num_ranges];
for (int i = 0; i < num_ranges; i++) {
ranges[i].start = Slice(range_start_key[i], range_start_key_len[i]);
@@ -266,28 +257,23 @@ void leveldb_approximate_sizes(
delete[] ranges;
}
-void leveldb_compact_range(
- leveldb_t* db,
- const char* start_key, size_t start_key_len,
- const char* limit_key, size_t limit_key_len) {
+void leveldb_compact_range(leveldb_t* db, const char* start_key,
+ size_t start_key_len, const char* limit_key,
+ size_t limit_key_len) {
Slice a, b;
db->rep->CompactRange(
- // Pass NULL Slice if corresponding "const char*" is NULL
- (start_key ? (a = Slice(start_key, start_key_len), &a) : NULL),
- (limit_key ? (b = Slice(limit_key, limit_key_len), &b) : NULL));
+ // Pass null Slice if corresponding "const char*" is null
+ (start_key ? (a = Slice(start_key, start_key_len), &a) : nullptr),
+ (limit_key ? (b = Slice(limit_key, limit_key_len), &b) : nullptr));
}
-void leveldb_destroy_db(
- const leveldb_options_t* options,
- const char* name,
- char** errptr) {
+void leveldb_destroy_db(const leveldb_options_t* options, const char* name,
+ char** errptr) {
SaveError(errptr, DestroyDB(name, options->rep));
}
-void leveldb_repair_db(
- const leveldb_options_t* options,
- const char* name,
- char** errptr) {
+void leveldb_repair_db(const leveldb_options_t* options, const char* name,
+ char** errptr) {
SaveError(errptr, RepairDB(name, options->rep));
}
@@ -296,7 +282,7 @@ void leveldb_iter_destroy(leveldb_iterator_t* iter) {
delete iter;
}
-unsigned char leveldb_iter_valid(const leveldb_iterator_t* iter) {
+uint8_t leveldb_iter_valid(const leveldb_iterator_t* iter) {
return iter->rep->Valid();
}
@@ -312,13 +298,9 @@ void leveldb_iter_seek(leveldb_iterator_t* iter, const char* k, size_t klen) {
iter->rep->Seek(Slice(k, klen));
}
-void leveldb_iter_next(leveldb_iterator_t* iter) {
- iter->rep->Next();
-}
+void leveldb_iter_next(leveldb_iterator_t* iter) { iter->rep->Next(); }
-void leveldb_iter_prev(leveldb_iterator_t* iter) {
- iter->rep->Prev();
-}
+void leveldb_iter_prev(leveldb_iterator_t* iter) { iter->rep->Prev(); }
const char* leveldb_iter_key(const leveldb_iterator_t* iter, size_t* klen) {
Slice s = iter->rep->key();
@@ -340,41 +322,34 @@ leveldb_writebatch_t* leveldb_writebatch_create() {
return new leveldb_writebatch_t;
}
-void leveldb_writebatch_destroy(leveldb_writebatch_t* b) {
- delete b;
-}
+void leveldb_writebatch_destroy(leveldb_writebatch_t* b) { delete b; }
-void leveldb_writebatch_clear(leveldb_writebatch_t* b) {
- b->rep.Clear();
-}
+void leveldb_writebatch_clear(leveldb_writebatch_t* b) { b->rep.Clear(); }
-void leveldb_writebatch_put(
- leveldb_writebatch_t* b,
- const char* key, size_t klen,
- const char* val, size_t vlen) {
+void leveldb_writebatch_put(leveldb_writebatch_t* b, const char* key,
+ size_t klen, const char* val, size_t vlen) {
b->rep.Put(Slice(key, klen), Slice(val, vlen));
}
-void leveldb_writebatch_delete(
- leveldb_writebatch_t* b,
- const char* key, size_t klen) {
+void leveldb_writebatch_delete(leveldb_writebatch_t* b, const char* key,
+ size_t klen) {
b->rep.Delete(Slice(key, klen));
}
-void leveldb_writebatch_iterate(
- leveldb_writebatch_t* b,
- void* state,
- void (*put)(void*, const char* k, size_t klen, const char* v, size_t vlen),
- void (*deleted)(void*, const char* k, size_t klen)) {
+void leveldb_writebatch_iterate(const leveldb_writebatch_t* b, void* state,
+ void (*put)(void*, const char* k, size_t klen,
+ const char* v, size_t vlen),
+ void (*deleted)(void*, const char* k,
+ size_t klen)) {
class H : public WriteBatch::Handler {
public:
void* state_;
void (*put_)(void*, const char* k, size_t klen, const char* v, size_t vlen);
void (*deleted_)(void*, const char* k, size_t klen);
- virtual void Put(const Slice& key, const Slice& value) {
+ void Put(const Slice& key, const Slice& value) override {
(*put_)(state_, key.data(), key.size(), value.data(), value.size());
}
- virtual void Delete(const Slice& key) {
+ void Delete(const Slice& key) override {
(*deleted_)(state_, key.data(), key.size());
}
};
@@ -385,47 +360,43 @@ void leveldb_writebatch_iterate(
b->rep.Iterate(&handler);
}
-leveldb_options_t* leveldb_options_create() {
- return new leveldb_options_t;
+void leveldb_writebatch_append(leveldb_writebatch_t* destination,
+ const leveldb_writebatch_t* source) {
+ destination->rep.Append(source->rep);
}
-void leveldb_options_destroy(leveldb_options_t* options) {
- delete options;
-}
+leveldb_options_t* leveldb_options_create() { return new leveldb_options_t; }
+
+void leveldb_options_destroy(leveldb_options_t* options) { delete options; }
-void leveldb_options_set_comparator(
- leveldb_options_t* opt,
- leveldb_comparator_t* cmp) {
+void leveldb_options_set_comparator(leveldb_options_t* opt,
+ leveldb_comparator_t* cmp) {
opt->rep.comparator = cmp;
}
-void leveldb_options_set_filter_policy(
- leveldb_options_t* opt,
- leveldb_filterpolicy_t* policy) {
+void leveldb_options_set_filter_policy(leveldb_options_t* opt,
+ leveldb_filterpolicy_t* policy) {
opt->rep.filter_policy = policy;
}
-void leveldb_options_set_create_if_missing(
- leveldb_options_t* opt, unsigned char v) {
+void leveldb_options_set_create_if_missing(leveldb_options_t* opt, uint8_t v) {
opt->rep.create_if_missing = v;
}
-void leveldb_options_set_error_if_exists(
- leveldb_options_t* opt, unsigned char v) {
+void leveldb_options_set_error_if_exists(leveldb_options_t* opt, uint8_t v) {
opt->rep.error_if_exists = v;
}
-void leveldb_options_set_paranoid_checks(
- leveldb_options_t* opt, unsigned char v) {
+void leveldb_options_set_paranoid_checks(leveldb_options_t* opt, uint8_t v) {
opt->rep.paranoid_checks = v;
}
void leveldb_options_set_env(leveldb_options_t* opt, leveldb_env_t* env) {
- opt->rep.env = (env ? env->rep : NULL);
+ opt->rep.env = (env ? env->rep : nullptr);
}
void leveldb_options_set_info_log(leveldb_options_t* opt, leveldb_logger_t* l) {
- opt->rep.info_log = (l ? l->rep : NULL);
+ opt->rep.info_log = (l ? l->rep : nullptr);
}
void leveldb_options_set_write_buffer_size(leveldb_options_t* opt, size_t s) {
@@ -448,17 +419,18 @@ void leveldb_options_set_block_restart_interval(leveldb_options_t* opt, int n) {
opt->rep.block_restart_interval = n;
}
+void leveldb_options_set_max_file_size(leveldb_options_t* opt, size_t s) {
+ opt->rep.max_file_size = s;
+}
+
void leveldb_options_set_compression(leveldb_options_t* opt, int t) {
opt->rep.compression = static_cast<CompressionType>(t);
}
leveldb_comparator_t* leveldb_comparator_create(
- void* state,
- void (*destructor)(void*),
- int (*compare)(
- void*,
- const char* a, size_t alen,
- const char* b, size_t blen),
+ void* state, void (*destructor)(void*),
+ int (*compare)(void*, const char* a, size_t alen, const char* b,
+ size_t blen),
const char* (*name)(void*)) {
leveldb_comparator_t* result = new leveldb_comparator_t;
result->state_ = state;
@@ -468,22 +440,15 @@ leveldb_comparator_t* leveldb_comparator_create(
return result;
}
-void leveldb_comparator_destroy(leveldb_comparator_t* cmp) {
- delete cmp;
-}
+void leveldb_comparator_destroy(leveldb_comparator_t* cmp) { delete cmp; }
leveldb_filterpolicy_t* leveldb_filterpolicy_create(
- void* state,
- void (*destructor)(void*),
- char* (*create_filter)(
- void*,
- const char* const* key_array, const size_t* key_length_array,
- int num_keys,
- size_t* filter_length),
- unsigned char (*key_may_match)(
- void*,
- const char* key, size_t length,
- const char* filter, size_t filter_length),
+ void* state, void (*destructor)(void*),
+ char* (*create_filter)(void*, const char* const* key_array,
+ const size_t* key_length_array, int num_keys,
+ size_t* filter_length),
+ uint8_t (*key_may_match)(void*, const char* key, size_t length,
+ const char* filter, size_t filter_length),
const char* (*name)(void*)) {
leveldb_filterpolicy_t* result = new leveldb_filterpolicy_t;
result->state_ = state;
@@ -503,7 +468,8 @@ leveldb_filterpolicy_t* leveldb_filterpolicy_create_bloom(int bits_per_key) {
// they delegate to a NewBloomFilterPolicy() instead of user
// supplied C functions.
struct Wrapper : public leveldb_filterpolicy_t {
- const FilterPolicy* rep_;
+ static void DoNothing(void*) {}
+
~Wrapper() { delete rep_; }
const char* Name() const { return rep_->Name(); }
void CreateFilter(const Slice* keys, int n, std::string* dst) const {
@@ -512,11 +478,12 @@ leveldb_filterpolicy_t* leveldb_filterpolicy_create_bloom(int bits_per_key) {
bool KeyMayMatch(const Slice& key, const Slice& filter) const {
return rep_->KeyMayMatch(key, filter);
}
- static void DoNothing(void*) { }
+
+ const FilterPolicy* rep_;
};
Wrapper* wrapper = new Wrapper;
wrapper->rep_ = NewBloomFilterPolicy(bits_per_key);
- wrapper->state_ = NULL;
+ wrapper->state_ = nullptr;
wrapper->destructor_ = &Wrapper::DoNothing;
return wrapper;
}
@@ -525,37 +492,29 @@ leveldb_readoptions_t* leveldb_readoptions_create() {
return new leveldb_readoptions_t;
}
-void leveldb_readoptions_destroy(leveldb_readoptions_t* opt) {
- delete opt;
-}
+void leveldb_readoptions_destroy(leveldb_readoptions_t* opt) { delete opt; }
-void leveldb_readoptions_set_verify_checksums(
- leveldb_readoptions_t* opt,
- unsigned char v) {
+void leveldb_readoptions_set_verify_checksums(leveldb_readoptions_t* opt,
+ uint8_t v) {
opt->rep.verify_checksums = v;
}
-void leveldb_readoptions_set_fill_cache(
- leveldb_readoptions_t* opt, unsigned char v) {
+void leveldb_readoptions_set_fill_cache(leveldb_readoptions_t* opt, uint8_t v) {
opt->rep.fill_cache = v;
}
-void leveldb_readoptions_set_snapshot(
- leveldb_readoptions_t* opt,
- const leveldb_snapshot_t* snap) {
- opt->rep.snapshot = (snap ? snap->rep : NULL);
+void leveldb_readoptions_set_snapshot(leveldb_readoptions_t* opt,
+ const leveldb_snapshot_t* snap) {
+ opt->rep.snapshot = (snap ? snap->rep : nullptr);
}
leveldb_writeoptions_t* leveldb_writeoptions_create() {
return new leveldb_writeoptions_t;
}
-void leveldb_writeoptions_destroy(leveldb_writeoptions_t* opt) {
- delete opt;
-}
+void leveldb_writeoptions_destroy(leveldb_writeoptions_t* opt) { delete opt; }
-void leveldb_writeoptions_set_sync(
- leveldb_writeoptions_t* opt, unsigned char v) {
+void leveldb_writeoptions_set_sync(leveldb_writeoptions_t* opt, uint8_t v) {
opt->rep.sync = v;
}
@@ -582,16 +541,22 @@ void leveldb_env_destroy(leveldb_env_t* env) {
delete env;
}
-void leveldb_free(void* ptr) {
- free(ptr);
-}
+char* leveldb_env_get_test_directory(leveldb_env_t* env) {
+ std::string result;
+ if (!env->rep->GetTestDirectory(&result).ok()) {
+ return nullptr;
+ }
-int leveldb_major_version() {
- return kMajorVersion;
+ char* buffer = static_cast<char*>(malloc(result.size() + 1));
+ memcpy(buffer, result.data(), result.size());
+ buffer[result.size()] = '\0';
+ return buffer;
}
-int leveldb_minor_version() {
- return kMinorVersion;
-}
+void leveldb_free(void* ptr) { free(ptr); }
+
+int leveldb_major_version() { return kMajorVersion; }
+
+int leveldb_minor_version() { return kMinorVersion; }
} // end extern "C"
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-14 06:35:36 +0000