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Add some std:: qualifiers to types and functions.

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PiperOrigin-RevId: 309110431
This commit is contained in:
Victor Costan 2020-04-29 22:31:41 +00:00
parent 3f934e3705
commit a6b3a2012e
34 changed files with 345 additions and 314 deletions
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136
benchmarks/db_bench.cc
View File

@ -221,8 +221,8 @@ class Stats {
double micros = now - last_op_finish_;
hist_.Add(micros);
if (micros > 20000) {
fprintf(stderr, "long op: %.1f micros%30s\r", micros, "");
fflush(stderr);
std::fprintf(stderr, "long op: %.1f micros%30s\r", micros, "");
std::fflush(stderr);
}
last_op_finish_ = now;
}
@ -243,8 +243,8 @@ class Stats {
next_report_ += 50000;
else
next_report_ += 100000;
fprintf(stderr, "... finished %d ops%30s\r", done_, "");
fflush(stderr);
std::fprintf(stderr, "... finished %d ops%30s\r", done_, "");
std::fflush(stderr);
}
}
@ -261,18 +261,20 @@ class Stats {
// elapsed times.
double elapsed = (finish_ - start_) * 1e-6;
char rate[100];
snprintf(rate, sizeof(rate), "%6.1f MB/s",
(bytes_ / 1048576.0) / elapsed);
std::snprintf(rate, sizeof(rate), "%6.1f MB/s",
(bytes_ / 1048576.0) / elapsed);
extra = rate;
}
AppendWithSpace(&extra, message_);
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n", name.ToString().c_str(),
seconds_ * 1e6 / done_, (extra.empty() ? "" : " "), extra.c_str());
std::fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
name.ToString().c_str(), seconds_ * 1e6 / done_,
(extra.empty() ? "" : " "), extra.c_str());
if (FLAGS_histogram) {
fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str());
std::fprintf(stdout, "Microseconds per op:\n%s\n",
hist_.ToString().c_str());
}
fflush(stdout);
std::fflush(stdout);
}
};
@ -323,51 +325,55 @@ class Benchmark {
void PrintHeader() {
const int kKeySize = 16;
PrintEnvironment();
fprintf(stdout, "Keys: %d bytes each\n", kKeySize);
fprintf(stdout, "Values: %d bytes each (%d bytes after compression)\n",
FLAGS_value_size,
static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
fprintf(stdout, "Entries: %d\n", num_);
fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
fprintf(stdout, "FileSize: %.1f MB (estimated)\n",
(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
1048576.0));
std::fprintf(stdout, "Keys: %d bytes each\n", kKeySize);
std::fprintf(
stdout, "Values: %d bytes each (%d bytes after compression)\n",
FLAGS_value_size,
static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
std::fprintf(stdout, "Entries: %d\n", num_);
std::fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
std::fprintf(
stdout, "FileSize: %.1f MB (estimated)\n",
(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
1048576.0));
PrintWarnings();
fprintf(stdout, "------------------------------------------------\n");
std::fprintf(stdout, "------------------------------------------------\n");
}
void PrintWarnings() {
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
fprintf(
std::fprintf(
stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
#endif
#ifndef NDEBUG
fprintf(stdout,
"WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
std::fprintf(
stdout,
"WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
#endif
// See if snappy is working by attempting to compress a compressible string
const char text[] = "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy";
std::string compressed;
if (!port::Snappy_Compress(text, sizeof(text), &compressed)) {
fprintf(stdout, "WARNING: Snappy compression is not enabled\n");
std::fprintf(stdout, "WARNING: Snappy compression is not enabled\n");
} else if (compressed.size() >= sizeof(text)) {
fprintf(stdout, "WARNING: Snappy compression is not effective\n");
std::fprintf(stdout, "WARNING: Snappy compression is not effective\n");
}
}
void PrintEnvironment() {
fprintf(stderr, "LevelDB: version %d.%d\n", kMajorVersion,
kMinorVersion);
std::fprintf(stderr, "LevelDB: version %d.%d\n", kMajorVersion,
kMinorVersion);
#if defined(__linux)
time_t now = time(nullptr);
fprintf(stderr, "Date: %s", ctime(&now)); // ctime() adds newline
std::fprintf(stderr, "Date: %s",
ctime(&now)); // ctime() adds newline
FILE* cpuinfo = fopen("/proc/cpuinfo", "r");
FILE* cpuinfo = std::fopen("/proc/cpuinfo", "r");
if (cpuinfo != nullptr) {
char line[1000];
int num_cpus = 0;
@ -387,9 +393,9 @@ class Benchmark {
cache_size = val.ToString();
}
}
fclose(cpuinfo);
fprintf(stderr, "CPU: %d * %s\n", num_cpus, cpu_type.c_str());
fprintf(stderr, "CPUCache: %s\n", cache_size.c_str());
std::fclose(cpuinfo);
std::fprintf(stderr, "CPU: %d * %s\n", num_cpus, cpu_type.c_str());
std::fprintf(stderr, "CPUCache: %s\n", cache_size.c_str());
}
#endif
}
@ -516,14 +522,15 @@ class Benchmark {
PrintStats("leveldb.sstables");
} else {
if (!name.empty()) { // No error message for empty name
fprintf(stderr, "unknown benchmark '%s'\n", name.ToString().c_str());
std::fprintf(stderr, "unknown benchmark '%s'\n",
name.ToString().c_str());
}
}
if (fresh_db) {
if (FLAGS_use_existing_db) {
fprintf(stdout, "%-12s : skipped (--use_existing_db is true)\n",
name.ToString().c_str());
std::fprintf(stdout, "%-12s : skipped (--use_existing_db is true)\n",
name.ToString().c_str());
method = nullptr;
} else {
delete db_;
@ -625,7 +632,7 @@ class Benchmark {
bytes += size;
}
// Print so result is not dead
fprintf(stderr, "... crc=0x%x\r", static_cast<unsigned int>(crc));
std::fprintf(stderr, "... crc=0x%x\r", static_cast<unsigned int>(crc));
thread->stats.AddBytes(bytes);
thread->stats.AddMessage(label);
@ -649,8 +656,8 @@ class Benchmark {
thread->stats.AddMessage("(snappy failure)");
} else {
char buf[100];
snprintf(buf, sizeof(buf), "(output: %.1f%%)",
(produced * 100.0) / bytes);
std::snprintf(buf, sizeof(buf), "(output: %.1f%%)",
(produced * 100.0) / bytes);
thread->stats.AddMessage(buf);
thread->stats.AddBytes(bytes);
}
@ -692,8 +699,8 @@ class Benchmark {
options.reuse_logs = FLAGS_reuse_logs;
Status s = DB::Open(options, FLAGS_db, &db_);
if (!s.ok()) {
fprintf(stderr, "open error: %s\n", s.ToString().c_str());
exit(1);
std::fprintf(stderr, "open error: %s\n", s.ToString().c_str());
std::exit(1);
}
}
@ -712,7 +719,7 @@ class Benchmark {
void DoWrite(ThreadState* thread, bool seq) {
if (num_ != FLAGS_num) {
char msg[100];
snprintf(msg, sizeof(msg), "(%d ops)", num_);
std::snprintf(msg, sizeof(msg), "(%d ops)", num_);
thread->stats.AddMessage(msg);
}
@ -725,15 +732,15 @@ class Benchmark {
for (int j = 0; j < entries_per_batch_; j++) {
const int k = seq ? i + j : (thread->rand.Next() % FLAGS_num);
char key[100];
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
batch.Put(key, gen.Generate(value_size_));
bytes += value_size_ + strlen(key);
thread->stats.FinishedSingleOp();
}
s = db_->Write(write_options_, &batch);
if (!s.ok()) {
fprintf(stderr, "put error: %s\n", s.ToString().c_str());
exit(1);
std::fprintf(stderr, "put error: %s\n", s.ToString().c_str());
std::exit(1);
}
}
thread->stats.AddBytes(bytes);
@ -772,14 +779,14 @@ class Benchmark {
for (int i = 0; i < reads_; i++) {
char key[100];
const int k = thread->rand.Next() % FLAGS_num;
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
if (db_->Get(options, key, &value).ok()) {
found++;
}
thread->stats.FinishedSingleOp();
}
char msg[100];
snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
std::snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
thread->stats.AddMessage(msg);
}
@ -789,7 +796,7 @@ class Benchmark {
for (int i = 0; i < reads_; i++) {
char key[100];
const int k = thread->rand.Next() % FLAGS_num;
snprintf(key, sizeof(key), "%016d.", k);
std::snprintf(key, sizeof(key), "%016d.", k);
db_->Get(options, key, &value);
thread->stats.FinishedSingleOp();
}
@ -802,7 +809,7 @@ class Benchmark {
for (int i = 0; i < reads_; i++) {
char key[100];
const int k = thread->rand.Next() % range;
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
db_->Get(options, key, &value);
thread->stats.FinishedSingleOp();
}
@ -815,14 +822,14 @@ class Benchmark {
Iterator* iter = db_->NewIterator(options);
char key[100];
const int k = thread->rand.Next() % FLAGS_num;
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
iter->Seek(key);
if (iter->Valid() && iter->key() == key) found++;
delete iter;
thread->stats.FinishedSingleOp();
}
char msg[100];
snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
std::snprintf(msg, sizeof(msg), "(%d of %d found)", found, num_);
thread->stats.AddMessage(msg);
}
@ -835,14 +842,14 @@ class Benchmark {
for (int j = 0; j < entries_per_batch_; j++) {
const int k = seq ? i + j : (thread->rand.Next() % FLAGS_num);
char key[100];
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
batch.Delete(key);
thread->stats.FinishedSingleOp();
}
s = db_->Write(write_options_, &batch);
if (!s.ok()) {
fprintf(stderr, "del error: %s\n", s.ToString().c_str());
exit(1);
std::fprintf(stderr, "del error: %s\n", s.ToString().c_str());
std::exit(1);
}
}
}
@ -868,11 +875,11 @@ class Benchmark {
const int k = thread->rand.Next() % FLAGS_num;
char key[100];
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
Status s = db_->Put(write_options_, key, gen.Generate(value_size_));
if (!s.ok()) {
fprintf(stderr, "put error: %s\n", s.ToString().c_str());
exit(1);
std::fprintf(stderr, "put error: %s\n", s.ToString().c_str());
std::exit(1);
}
}
@ -888,7 +895,7 @@ class Benchmark {
if (!db_->GetProperty(key, &stats)) {
stats = "(failed)";
}
fprintf(stdout, "\n%s\n", stats.c_str());
std::fprintf(stdout, "\n%s\n", stats.c_str());
}
static void WriteToFile(void* arg, const char* buf, int n) {
@ -897,17 +904,18 @@ class Benchmark {
void HeapProfile() {
char fname[100];
snprintf(fname, sizeof(fname), "%s/heap-%04d", FLAGS_db, ++heap_counter_);
std::snprintf(fname, sizeof(fname), "%s/heap-%04d", FLAGS_db,
++heap_counter_);
WritableFile* file;
Status s = g_env->NewWritableFile(fname, &file);
if (!s.ok()) {
fprintf(stderr, "%s\n", s.ToString().c_str());
std::fprintf(stderr, "%s\n", s.ToString().c_str());
return;
}
bool ok = port::GetHeapProfile(WriteToFile, file);
delete file;
if (!ok) {
fprintf(stderr, "heap profiling not supported\n");
std::fprintf(stderr, "heap profiling not supported\n");
g_env->RemoveFile(fname);
}
}
@ -962,8 +970,8 @@ int main(int argc, char** argv) {
} else if (strncmp(argv[i], "--db=", 5) == 0) {
FLAGS_db = argv[i] + 5;
} else {
fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
exit(1);
std::fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
std::exit(1);
}
}

98
benchmarks/db_bench_sqlite3.cc
View File

@ -84,23 +84,23 @@ static const char* FLAGS_db = nullptr;
inline static void ExecErrorCheck(int status, char* err_msg) {
if (status != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err_msg);
std::fprintf(stderr, "SQL error: %s\n", err_msg);
sqlite3_free(err_msg);
exit(1);
std::exit(1);
}
}
inline static void StepErrorCheck(int status) {
if (status != SQLITE_DONE) {
fprintf(stderr, "SQL step error: status = %d\n", status);
exit(1);
std::fprintf(stderr, "SQL step error: status = %d\n", status);
std::exit(1);
}
}
inline static void ErrorCheck(int status) {
if (status != SQLITE_OK) {
fprintf(stderr, "sqlite3 error: status = %d\n", status);
exit(1);
std::fprintf(stderr, "sqlite3 error: status = %d\n", status);
std::exit(1);
}
}
@ -182,36 +182,38 @@ class Benchmark {
void PrintHeader() {
const int kKeySize = 16;
PrintEnvironment();
fprintf(stdout, "Keys: %d bytes each\n", kKeySize);
fprintf(stdout, "Values: %d bytes each\n", FLAGS_value_size);
fprintf(stdout, "Entries: %d\n", num_);
fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
std::fprintf(stdout, "Keys: %d bytes each\n", kKeySize);
std::fprintf(stdout, "Values: %d bytes each\n", FLAGS_value_size);
std::fprintf(stdout, "Entries: %d\n", num_);
std::fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
PrintWarnings();
fprintf(stdout, "------------------------------------------------\n");
std::fprintf(stdout, "------------------------------------------------\n");
}
void PrintWarnings() {
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
fprintf(
std::fprintf(
stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
#endif
#ifndef NDEBUG
fprintf(stdout,
"WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
std::fprintf(
stdout,
"WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
#endif
}
void PrintEnvironment() {
fprintf(stderr, "SQLite: version %s\n", SQLITE_VERSION);
std::fprintf(stderr, "SQLite: version %s\n", SQLITE_VERSION);
#if defined(__linux)
time_t now = time(nullptr);
fprintf(stderr, "Date: %s", ctime(&now)); // ctime() adds newline
std::fprintf(stderr, "Date: %s",
ctime(&now)); // ctime() adds newline
FILE* cpuinfo = fopen("/proc/cpuinfo", "r");
FILE* cpuinfo = std::fopen("/proc/cpuinfo", "r");
if (cpuinfo != nullptr) {
char line[1000];
int num_cpus = 0;
@ -231,9 +233,9 @@ class Benchmark {
cache_size = val.ToString();
}
}
fclose(cpuinfo);
fprintf(stderr, "CPU: %d * %s\n", num_cpus, cpu_type.c_str());
fprintf(stderr, "CPUCache: %s\n", cache_size.c_str());
std::fclose(cpuinfo);
std::fprintf(stderr, "CPU: %d * %s\n", num_cpus, cpu_type.c_str());
std::fprintf(stderr, "CPUCache: %s\n", cache_size.c_str());
}
#endif
}
@ -254,8 +256,8 @@ class Benchmark {
double micros = (now - last_op_finish_) * 1e6;
hist_.Add(micros);
if (micros > 20000) {
fprintf(stderr, "long op: %.1f micros%30s\r", micros, "");
fflush(stderr);
std::fprintf(stderr, "long op: %.1f micros%30s\r", micros, "");
std::fflush(stderr);
}
last_op_finish_ = now;
}
@ -276,8 +278,8 @@ class Benchmark {
next_report_ += 50000;
else
next_report_ += 100000;
fprintf(stderr, "... finished %d ops%30s\r", done_, "");
fflush(stderr);
std::fprintf(stderr, "... finished %d ops%30s\r", done_, "");
std::fflush(stderr);
}
}
@ -290,8 +292,8 @@ class Benchmark {
if (bytes_ > 0) {
char rate[100];
snprintf(rate, sizeof(rate), "%6.1f MB/s",
(bytes_ / 1048576.0) / (finish - start_));
std::snprintf(rate, sizeof(rate), "%6.1f MB/s",
(bytes_ / 1048576.0) / (finish - start_));
if (!message_.empty()) {
message_ = std::string(rate) + " " + message_;
} else {
@ -299,13 +301,14 @@ class Benchmark {
}
}
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n", name.ToString().c_str(),
(finish - start_) * 1e6 / done_, (message_.empty() ? "" : " "),
message_.c_str());
std::fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
name.ToString().c_str(), (finish - start_) * 1e6 / done_,
(message_.empty() ? "" : " "), message_.c_str());
if (FLAGS_histogram) {
fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str());
std::fprintf(stdout, "Microseconds per op:\n%s\n",
hist_.ToString().c_str());
}
fflush(stdout);
std::fflush(stdout);
}
public:
@ -405,7 +408,8 @@ class Benchmark {
} else {
known = false;
if (name != Slice()) { // No error message for empty name
fprintf(stderr, "unknown benchmark '%s'\n", name.ToString().c_str());
std::fprintf(stderr, "unknown benchmark '%s'\n",
name.ToString().c_str());
}
}
if (known) {
@ -425,26 +429,26 @@ class Benchmark {
// Open database
std::string tmp_dir;
Env::Default()->GetTestDirectory(&tmp_dir);
snprintf(file_name, sizeof(file_name), "%s/dbbench_sqlite3-%d.db",
tmp_dir.c_str(), db_num_);
std::snprintf(file_name, sizeof(file_name), "%s/dbbench_sqlite3-%d.db",
tmp_dir.c_str(), db_num_);
status = sqlite3_open(file_name, &db_);
if (status) {
fprintf(stderr, "open error: %s\n", sqlite3_errmsg(db_));
exit(1);
std::fprintf(stderr, "open error: %s\n", sqlite3_errmsg(db_));
std::exit(1);
}
// Change SQLite cache size
char cache_size[100];
snprintf(cache_size, sizeof(cache_size), "PRAGMA cache_size = %d",
FLAGS_num_pages);
std::snprintf(cache_size, sizeof(cache_size), "PRAGMA cache_size = %d",
FLAGS_num_pages);
status = sqlite3_exec(db_, cache_size, nullptr, nullptr, &err_msg);
ExecErrorCheck(status, err_msg);
// FLAGS_page_size is defaulted to 1024
if (FLAGS_page_size != 1024) {
char page_size[100];
snprintf(page_size, sizeof(page_size), "PRAGMA page_size = %d",
FLAGS_page_size);
std::snprintf(page_size, sizeof(page_size), "PRAGMA page_size = %d",
FLAGS_page_size);
status = sqlite3_exec(db_, page_size, nullptr, nullptr, &err_msg);
ExecErrorCheck(status, err_msg);
}
@ -492,7 +496,7 @@ class Benchmark {
if (num_entries != num_) {
char msg[100];
snprintf(msg, sizeof(msg), "(%d ops)", num_entries);
std::snprintf(msg, sizeof(msg), "(%d ops)", num_entries);
message_ = msg;
}
@ -539,7 +543,7 @@ class Benchmark {
const int k =
(order == SEQUENTIAL) ? i + j : (rand_.Next() % num_entries);
char key[100];
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
// Bind KV values into replace_stmt
status = sqlite3_bind_blob(replace_stmt, 1, key, 16, SQLITE_STATIC);
@ -612,7 +616,7 @@ class Benchmark {
// Create key value
char key[100];
int k = (order == SEQUENTIAL) ? i + j : (rand_.Next() % reads_);
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
// Bind key value into read_stmt
status = sqlite3_bind_blob(read_stmt, 1, key, 16, SQLITE_STATIC);
@ -704,8 +708,8 @@ int main(int argc, char** argv) {
} else if (strncmp(argv[i], "--db=", 5) == 0) {
FLAGS_db = argv[i] + 5;
} else {
fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
exit(1);
std::fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
std::exit(1);
}
}

98
benchmarks/db_bench_tree_db.cc
View File

@ -75,7 +75,7 @@ static const char* FLAGS_db = nullptr;
inline static void DBSynchronize(kyotocabinet::TreeDB* db_) {
// Synchronize will flush writes to disk
if (!db_->synchronize()) {
fprintf(stderr, "synchronize error: %s\n", db_->error().name());
std::fprintf(stderr, "synchronize error: %s\n", db_->error().name());
}
}
@ -150,42 +150,47 @@ class Benchmark {
void PrintHeader() {
const int kKeySize = 16;
PrintEnvironment();
fprintf(stdout, "Keys: %d bytes each\n", kKeySize);
fprintf(stdout, "Values: %d bytes each (%d bytes after compression)\n",
FLAGS_value_size,
static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
fprintf(stdout, "Entries: %d\n", num_);
fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
fprintf(stdout, "FileSize: %.1f MB (estimated)\n",
(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
1048576.0));
std::fprintf(stdout, "Keys: %d bytes each\n", kKeySize);
std::fprintf(
stdout, "Values: %d bytes each (%d bytes after compression)\n",
FLAGS_value_size,
static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
std::fprintf(stdout, "Entries: %d\n", num_);
std::fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
std::fprintf(
stdout, "FileSize: %.1f MB (estimated)\n",
(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
1048576.0));
PrintWarnings();
fprintf(stdout, "------------------------------------------------\n");
std::fprintf(stdout, "------------------------------------------------\n");
}
void PrintWarnings() {
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
fprintf(
std::fprintf(
stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
#endif
#ifndef NDEBUG
fprintf(stdout,
"WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
std::fprintf(
stdout,
"WARNING: Assertions are enabled; benchmarks unnecessarily slow\n");
#endif
}
void PrintEnvironment() {
fprintf(stderr, "Kyoto Cabinet: version %s, lib ver %d, lib rev %d\n",
kyotocabinet::VERSION, kyotocabinet::LIBVER, kyotocabinet::LIBREV);
std::fprintf(
stderr, "Kyoto Cabinet: version %s, lib ver %d, lib rev %d\n",
kyotocabinet::VERSION, kyotocabinet::LIBVER, kyotocabinet::LIBREV);
#if defined(__linux)
time_t now = time(nullptr);
fprintf(stderr, "Date: %s", ctime(&now)); // ctime() adds newline
std::fprintf(stderr, "Date: %s",
ctime(&now)); // ctime() adds newline
FILE* cpuinfo = fopen("/proc/cpuinfo", "r");
FILE* cpuinfo = std::fopen("/proc/cpuinfo", "r");
if (cpuinfo != nullptr) {
char line[1000];
int num_cpus = 0;
@ -205,9 +210,10 @@ class Benchmark {
cache_size = val.ToString();
}
}
fclose(cpuinfo);
fprintf(stderr, "CPU: %d * %s\n", num_cpus, cpu_type.c_str());
fprintf(stderr, "CPUCache: %s\n", cache_size.c_str());
std::fclose(cpuinfo);
std::fprintf(stderr, "CPU: %d * %s\n", num_cpus,
cpu_type.c_str());
std::fprintf(stderr, "CPUCache: %s\n", cache_size.c_str());
}
#endif
}
@ -228,8 +234,8 @@ class Benchmark {
double micros = (now - last_op_finish_) * 1e6;
hist_.Add(micros);
if (micros > 20000) {
fprintf(stderr, "long op: %.1f micros%30s\r", micros, "");
fflush(stderr);
std::fprintf(stderr, "long op: %.1f micros%30s\r", micros, "");
std::fflush(stderr);
}
last_op_finish_ = now;
}
@ -250,8 +256,8 @@ class Benchmark {
next_report_ += 50000;
else
next_report_ += 100000;
fprintf(stderr, "... finished %d ops%30s\r", done_, "");
fflush(stderr);
std::fprintf(stderr, "... finished %d ops%30s\r", done_, "");
std::fflush(stderr);
}
}
@ -264,8 +270,8 @@ class Benchmark {
if (bytes_ > 0) {
char rate[100];
snprintf(rate, sizeof(rate), "%6.1f MB/s",
(bytes_ / 1048576.0) / (finish - start_));
std::snprintf(rate, sizeof(rate), "%6.1f MB/s",
(bytes_ / 1048576.0) / (finish - start_));
if (!message_.empty()) {
message_ = std::string(rate) + " " + message_;
} else {
@ -273,13 +279,14 @@ class Benchmark {
}
}
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n", name.ToString().c_str(),
(finish - start_) * 1e6 / done_, (message_.empty() ? "" : " "),
message_.c_str());
std::fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
name.ToString().c_str(), (finish - start_) * 1e6 / done_,
(message_.empty() ? "" : " "), message_.c_str());
if (FLAGS_histogram) {
fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str());
std::fprintf(stdout, "Microseconds per op:\n%s\n",
hist_.ToString().c_str());
}
fflush(stdout);
std::fflush(stdout);
}
public:
@ -310,7 +317,7 @@ class Benchmark {
~Benchmark() {
if (!db_->close()) {
fprintf(stderr, "close error: %s\n", db_->error().name());
std::fprintf(stderr, "close error: %s\n", db_->error().name());
}
}
@ -374,7 +381,8 @@ class Benchmark {
} else {
known = false;
if (name != Slice()) { // No error message for empty name
fprintf(stderr, "unknown benchmark '%s'\n", name.ToString().c_str());
std::fprintf(stderr, "unknown benchmark '%s'\n",
name.ToString().c_str());
}
}
if (known) {
@ -393,8 +401,8 @@ class Benchmark {
db_num_++;
std::string test_dir;
Env::Default()->GetTestDirectory(&test_dir);
snprintf(file_name, sizeof(file_name), "%s/dbbench_polyDB-%d.kct",
test_dir.c_str(), db_num_);
std::snprintf(file_name, sizeof(file_name), "%s/dbbench_polyDB-%d.kct",
test_dir.c_str(), db_num_);
// Create tuning options and open the database
int open_options =
@ -413,7 +421,7 @@ class Benchmark {
open_options |= kyotocabinet::PolyDB::OAUTOSYNC;
}
if (!db_->open(file_name, open_options)) {
fprintf(stderr, "open error: %s\n", db_->error().name());
std::fprintf(stderr, "open error: %s\n", db_->error().name());
}
}
@ -433,7 +441,7 @@ class Benchmark {
if (num_entries != num_) {
char msg[100];
snprintf(msg, sizeof(msg), "(%d ops)", num_entries);
std::snprintf(msg, sizeof(msg), "(%d ops)", num_entries);
message_ = msg;
}
@ -441,11 +449,11 @@ class Benchmark {
for (int i = 0; i < num_entries; i++) {
const int k = (order == SEQUENTIAL) ? i : (rand_.Next() % num_entries);
char key[100];
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
bytes_ += value_size + strlen(key);
std::string cpp_key = key;
if (!db_->set(cpp_key, gen_.Generate(value_size).ToString())) {
fprintf(stderr, "set error: %s\n", db_->error().name());
std::fprintf(stderr, "set error: %s\n", db_->error().name());
}
FinishedSingleOp();
}
@ -467,7 +475,7 @@ class Benchmark {
for (int i = 0; i < reads_; i++) {
char key[100];
const int k = rand_.Next() % reads_;
snprintf(key, sizeof(key), "%016d", k);
std::snprintf(key, sizeof(key), "%016d", k);
db_->get(key, &value);
FinishedSingleOp();
}
@ -505,8 +513,8 @@ int main(int argc, char** argv) {
} else if (strncmp(argv[i], "--db=", 5) == 0) {
FLAGS_db = argv[i] + 5;
} else {
fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
exit(1);
std::fprintf(stderr, "Invalid flag '%s'\n", argv[i]);
std::exit(1);
}
}

6
db/autocompact_test.cc
View File

@ -30,7 +30,7 @@ class AutoCompactTest : public testing::Test {
std::string Key(int i) {
char buf[100];
snprintf(buf, sizeof(buf), "key%06d", i);
std::snprintf(buf, sizeof(buf), "key%06d", i);
return std::string(buf);
}
@ -89,8 +89,8 @@ void AutoCompactTest::DoReads(int n) {
// Wait a little bit to allow any triggered compactions to complete.
Env::Default()->SleepForMicroseconds(1000000);
uint64_t size = Size(Key(0), Key(n));
fprintf(stderr, "iter %3d => %7.3f MB [other %7.3f MB]\n", read + 1,
size / 1048576.0, Size(Key(n), Key(kCount)) / 1048576.0);
std::fprintf(stderr, "iter %3d => %7.3f MB [other %7.3f MB]\n", read + 1,
size / 1048576.0, Size(Key(n), Key(kCount)) / 1048576.0);
if (size <= initial_size / 10) {
break;
}

4
db/c.cc
View File

@ -158,7 +158,7 @@ static bool SaveError(char** errptr, const Status& s) {
static char* CopyString(const std::string& str) {
char* result = reinterpret_cast<char*>(malloc(sizeof(char) * str.size()));
memcpy(result, str.data(), sizeof(char) * str.size());
std::memcpy(result, str.data(), sizeof(char) * str.size());
return result;
}
@ -548,7 +548,7 @@ char* leveldb_env_get_test_directory(leveldb_env_t* env) {
}
char* buffer = static_cast<char*>(malloc(result.size() + 1));
memcpy(buffer, result.data(), result.size());
std::memcpy(buffer, result.data(), result.size());
buffer[result.size()] = '\0';
return buffer;
}

11
db/corruption_test.cc
View File

@ -58,7 +58,7 @@ class CorruptionTest : public testing::Test {
std::string key_space, value_space;
WriteBatch batch;
for (int i = 0; i < n; i++) {
// if ((i % 100) == 0) fprintf(stderr, "@ %d of %d\n", i, n);
// if ((i % 100) == 0) std::fprintf(stderr, "@ %d of %d\n", i, n);
Slice key = Key(i, &key_space);
batch.Clear();
batch.Put(key, Value(i, &value_space));
@ -102,9 +102,10 @@ class CorruptionTest : public testing::Test {
}
delete iter;
fprintf(stderr,
"expected=%d..%d; got=%d; bad_keys=%d; bad_values=%d; missed=%d\n",
min_expected, max_expected, correct, bad_keys, bad_values, missed);
std::fprintf(
stderr,
"expected=%d..%d; got=%d; bad_keys=%d; bad_values=%d; missed=%d\n",
min_expected, max_expected, correct, bad_keys, bad_values, missed);
ASSERT_LE(min_expected, correct);
ASSERT_GE(max_expected, correct);
}
@ -169,7 +170,7 @@ class CorruptionTest : public testing::Test {
// Return the ith key
Slice Key(int i, std::string* storage) {
char buf[100];
snprintf(buf, sizeof(buf), "%016d", i);
std::snprintf(buf, sizeof(buf), "%016d", i);
storage->assign(buf, strlen(buf));
return Slice(*storage);
}

30
db/db_impl.cc
View File

@ -350,8 +350,8 @@ Status DBImpl::Recover(VersionEdit* edit, bool* save_manifest) {
}
if (!expected.empty()) {
char buf[50];
snprintf(buf, sizeof(buf), "%d missing files; e.g.",
static_cast<int>(expected.size()));
std::snprintf(buf, sizeof(buf), "%d missing files; e.g.",
static_cast<int>(expected.size()));
return Status::Corruption(buf, TableFileName(dbname_, *(expected.begin())));
}
@ -1396,26 +1396,26 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
return false;
} else {
char buf[100];
snprintf(buf, sizeof(buf), "%d",
versions_->NumLevelFiles(static_cast<int>(level)));
std::snprintf(buf, sizeof(buf), "%d",
versions_->NumLevelFiles(static_cast<int>(level)));
*value = buf;
return true;
}
} else if (in == "stats") {
char buf[200];
snprintf(buf, sizeof(buf),
" Compactions\n"
"Level Files Size(MB) Time(sec) Read(MB) Write(MB)\n"
"--------------------------------------------------\n");
std::snprintf(buf, sizeof(buf),
" Compactions\n"
"Level Files Size(MB) Time(sec) Read(MB) Write(MB)\n"
"--------------------------------------------------\n");
value->append(buf);
for (int level = 0; level < config::kNumLevels; level++) {
int files = versions_->NumLevelFiles(level);
if (stats_[level].micros > 0 || files > 0) {
snprintf(buf, sizeof(buf), "%3d %8d %8.0f %9.0f %8.0f %9.0f\n", level,
files, versions_->NumLevelBytes(level) / 1048576.0,
stats_[level].micros / 1e6,
stats_[level].bytes_read / 1048576.0,
stats_[level].bytes_written / 1048576.0);
std::snprintf(buf, sizeof(buf), "%3d %8d %8.0f %9.0f %8.0f %9.0f\n",
level, files, versions_->NumLevelBytes(level) / 1048576.0,
stats_[level].micros / 1e6,
stats_[level].bytes_read / 1048576.0,
stats_[level].bytes_written / 1048576.0);
value->append(buf);
}
}
@ -1432,8 +1432,8 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
total_usage += imm_->ApproximateMemoryUsage();
}
char buf[50];
snprintf(buf, sizeof(buf), "%llu",
static_cast<unsigned long long>(total_usage));
std::snprintf(buf, sizeof(buf), "%llu",
static_cast<unsigned long long>(total_usage));
value->append(buf);
return true;
}

4
db/db_iter.cc
View File

@ -21,9 +21,9 @@ static void DumpInternalIter(Iterator* iter) {
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
ParsedInternalKey k;
if (!ParseInternalKey(iter->key(), &k)) {
fprintf(stderr, "Corrupt '%s'\n", EscapeString(iter->key()).c_str());
std::fprintf(stderr, "Corrupt '%s'\n", EscapeString(iter->key()).c_str());
} else {
fprintf(stderr, "@ '%s'\n", k.DebugString().c_str());
std::fprintf(stderr, "@ '%s'\n", k.DebugString().c_str());
}
}
}

73
db/db_test.cc
View File

@ -424,7 +424,7 @@ class DBTest : public testing::Test {
for (int level = 0; level < config::kNumLevels; level++) {
int f = NumTableFilesAtLevel(level);
char buf[100];
snprintf(buf, sizeof(buf), "%s%d", (level ? "," : ""), f);
std::snprintf(buf, sizeof(buf), "%s%d", (level ? "," : ""), f);
result += buf;
if (f > 0) {
last_non_zero_offset = result.size();
@ -469,14 +469,14 @@ class DBTest : public testing::Test {
}
void DumpFileCounts(const char* label) {
fprintf(stderr, "---\n%s:\n", label);
fprintf(
std::fprintf(stderr, "---\n%s:\n", label);
std::fprintf(
stderr, "maxoverlap: %lld\n",
static_cast<long long>(dbfull()->TEST_MaxNextLevelOverlappingBytes()));
for (int level = 0; level < config::kNumLevels; level++) {
int num = NumTableFilesAtLevel(level);
if (num > 0) {
fprintf(stderr, " level %3d : %d files\n", level, num);
std::fprintf(stderr, " level %3d : %d files\n", level, num);
}
}
}
@ -1024,7 +1024,7 @@ TEST_F(DBTest, RecoverDuringMemtableCompaction) {
static std::string Key(int i) {
char buf[100];
snprintf(buf, sizeof(buf), "key%06d", i);
std::snprintf(buf, sizeof(buf), "key%06d", i);
return std::string(buf);
}
@ -1118,7 +1118,7 @@ TEST_F(DBTest, RepeatedWritesToSameKey) {
for (int i = 0; i < 5 * kMaxFiles; i++) {
Put("key", value);
ASSERT_LE(TotalTableFiles(), kMaxFiles);
fprintf(stderr, "after %d: %d files\n", i + 1, TotalTableFiles());
std::fprintf(stderr, "after %d: %d files\n", i + 1, TotalTableFiles());
}
}
@ -1140,7 +1140,7 @@ TEST_F(DBTest, SparseMerge) {
// Write approximately 100MB of "B" values
for (int i = 0; i < 100000; i++) {
char key[100];
snprintf(key, sizeof(key), "B%010d", i);
std::snprintf(key, sizeof(key), "B%010d", i);
Put(key, value);
}
Put("C", "vc");
@ -1165,9 +1165,9 @@ TEST_F(DBTest, SparseMerge) {
static bool Between(uint64_t val, uint64_t low, uint64_t high) {
bool result = (val >= low) && (val <= high);
if (!result) {
fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
(unsigned long long)(val), (unsigned long long)(low),
(unsigned long long)(high));
std::fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
(unsigned long long)(val), (unsigned long long)(low),
(unsigned long long)(high));
}
return result;
}
@ -1501,7 +1501,7 @@ TEST_F(DBTest, Fflush_Issue474) {
static const int kNum = 100000;
Random rnd(test::RandomSeed());
for (int i = 0; i < kNum; i++) {
fflush(nullptr);
std::fflush(nullptr);
ASSERT_LEVELDB_OK(Put(RandomKey(&rnd), RandomString(&rnd, 100)));
}
}
@ -1578,7 +1578,7 @@ TEST_F(DBTest, CustomComparator) {
for (int run = 0; run < 2; run++) {
for (int i = 0; i < 1000; i++) {
char buf[100];
snprintf(buf, sizeof(buf), "[%d]", i * 10);
std::snprintf(buf, sizeof(buf), "[%d]", i * 10);
ASSERT_LEVELDB_OK(Put(buf, buf));
}
Compact("[0]", "[1000000]");
@ -1748,7 +1748,7 @@ TEST_F(DBTest, NonWritableFileSystem) {
std::string big(100000, 'x');
int errors = 0;
for (int i = 0; i < 20; i++) {
fprintf(stderr, "iter %d; errors %d\n", i, errors);
std::fprintf(stderr, "iter %d; errors %d\n", i, errors);
if (!Put("foo", big).ok()) {
errors++;
DelayMilliseconds(100);
@ -1901,7 +1901,7 @@ TEST_F(DBTest, BloomFilter) {
ASSERT_EQ(Key(i), Get(Key(i)));
}
int reads = env_->random_read_counter_.Read();
fprintf(stderr, "%d present => %d reads\n", N, reads);
std::fprintf(stderr, "%d present => %d reads\n", N, reads);
ASSERT_GE(reads, N);
ASSERT_LE(reads, N + 2 * N / 100);
@ -1911,7 +1911,7 @@ TEST_F(DBTest, BloomFilter) {
ASSERT_EQ("NOT_FOUND", Get(Key(i) + ".missing"));
}
reads = env_->random_read_counter_.Read();
fprintf(stderr, "%d missing => %d reads\n", N, reads);
std::fprintf(stderr, "%d missing => %d reads\n", N, reads);
ASSERT_LE(reads, 3 * N / 100);
env_->delay_data_sync_.store(false, std::memory_order_release);
@ -1944,7 +1944,7 @@ static void MTThreadBody(void* arg) {
int id = t->id;
DB* db = t->state->test->db_;
int counter = 0;
fprintf(stderr, "... starting thread %d\n", id);
std::fprintf(stderr, "... starting thread %d\n", id);
Random rnd(1000 + id);
std::string value;
char valbuf[1500];
@ -1953,13 +1953,13 @@ static void MTThreadBody(void* arg) {
int key = rnd.Uniform(kNumKeys);
char keybuf[20];
snprintf(keybuf, sizeof(keybuf), "%016d", key);
std::snprintf(keybuf, sizeof(keybuf), "%016d", key);
if (rnd.OneIn(2)) {
// Write values of the form <key, my id, counter>.
// We add some padding for force compactions.
snprintf(valbuf, sizeof(valbuf), "%d.%d.%-1000d", key, id,
static_cast<int>(counter));
std::snprintf(valbuf, sizeof(valbuf), "%d.%d.%-1000d", key, id,
static_cast<int>(counter));
ASSERT_LEVELDB_OK(db->Put(WriteOptions(), Slice(keybuf), Slice(valbuf)));
} else {
// Read a value and verify that it matches the pattern written above.
@ -1980,7 +1980,7 @@ static void MTThreadBody(void* arg) {
counter++;
}
t->state->thread_done[id].store(true, std::memory_order_release);
fprintf(stderr, "... stopping thread %d after %d ops\n", id, counter);
std::fprintf(stderr, "... stopping thread %d after %d ops\n", id, counter);
}
} // namespace
@ -2134,30 +2134,31 @@ static bool CompareIterators(int step, DB* model, DB* db,
ok && miter->Valid() && dbiter->Valid(); miter->Next(), dbiter->Next()) {
count++;
if (miter->key().compare(dbiter->key()) != 0) {
fprintf(stderr, "step %d: Key mismatch: '%s' vs. '%s'\n", step,
EscapeString(miter->key()).c_str(),
EscapeString(dbiter->key()).c_str());
std::fprintf(stderr, "step %d: Key mismatch: '%s' vs. '%s'\n", step,
EscapeString(miter->key()).c_str(),
EscapeString(dbiter->key()).c_str());
ok = false;
break;
}
if (miter->value().compare(dbiter->value()) != 0) {
fprintf(stderr, "step %d: Value mismatch for key '%s': '%s' vs. '%s'\n",
step, EscapeString(miter->key()).c_str(),
EscapeString(miter->value()).c_str(),
EscapeString(miter->value()).c_str());
std::fprintf(stderr,
"step %d: Value mismatch for key '%s': '%s' vs. '%s'\n",
step, EscapeString(miter->key()).c_str(),
EscapeString(miter->value()).c_str(),
EscapeString(miter->value()).c_str());
ok = false;
}
}
if (ok) {
if (miter->Valid() != dbiter->Valid()) {
fprintf(stderr, "step %d: Mismatch at end of iterators: %d vs. %d\n",
step, miter->Valid(), dbiter->Valid());
std::fprintf(stderr, "step %d: Mismatch at end of iterators: %d vs. %d\n",
step, miter->Valid(), dbiter->Valid());
ok = false;
}
}
fprintf(stderr, "%d entries compared: ok=%d\n", count, ok);
std::fprintf(stderr, "%d entries compared: ok=%d\n", count, ok);
delete miter;
delete dbiter;
return ok;
@ -2173,7 +2174,7 @@ TEST_F(DBTest, Randomized) {
std::string k, v;
for (int step = 0; step < N; step++) {
if (step % 100 == 0) {
fprintf(stderr, "Step %d of %d\n", step, N);
std::fprintf(stderr, "Step %d of %d\n", step, N);
}
// TODO(sanjay): Test Get() works
int p = rnd.Uniform(100);
@ -2233,7 +2234,7 @@ TEST_F(DBTest, Randomized) {
std::string MakeKey(unsigned int num) {
char buf[30];
snprintf(buf, sizeof(buf), "%016u", num);
std::snprintf(buf, sizeof(buf), "%016u", num);
return std::string(buf);
}
@ -2283,10 +2284,10 @@ void BM_LogAndApply(int iters, int num_base_files) {
uint64_t stop_micros = env->NowMicros();
unsigned int us = stop_micros - start_micros;
char buf[16];
snprintf(buf, sizeof(buf), "%d", num_base_files);
fprintf(stderr,
"BM_LogAndApply/%-6s %8d iters : %9u us (%7.0f us / iter)\n", buf,
iters, us, ((float)us) / iters);
std::snprintf(buf, sizeof(buf), "%d", num_base_files);
std::fprintf(stderr,
"BM_LogAndApply/%-6s %8d iters : %9u us (%7.0f us / iter)\n",
buf, iters, us, ((float)us) / iters);
}
} // namespace leveldb

2
db/dbformat.cc
View File

@ -126,7 +126,7 @@ LookupKey::LookupKey(const Slice& user_key, SequenceNumber s) {
start_ = dst;
dst = EncodeVarint32(dst, usize + 8);
kstart_ = dst;
memcpy(dst, user_key.data(), usize);
std::memcpy(dst, user_key.data(), usize);
dst += usize;
EncodeFixed64(dst, PackSequenceAndType(s, kValueTypeForSeek));
dst += 8;

4
db/fault_injection_test.cc
View File

@ -427,7 +427,7 @@ class FaultInjectionTest : public testing::Test {
EXPECT_EQ(value_space, val);
}
} else if (s.ok()) {
fprintf(stderr, "Expected an error at %d, but was OK\n", i);
std::fprintf(stderr, "Expected an error at %d, but was OK\n", i);
s = Status::IOError(dbname_, "Expected value error:");
} else {
s = Status::OK(); // An expected error
@ -439,7 +439,7 @@ class FaultInjectionTest : public testing::Test {
// Return the ith key
Slice Key(int i, std::string* storage) const {
char buf[100];
snprintf(buf, sizeof(buf), "%016d", i);
std::snprintf(buf, sizeof(buf), "%016d", i);
storage->assign(buf, strlen(buf));
return Slice(*storage);
}

8
db/filename.cc
View File

@ -20,8 +20,8 @@ Status WriteStringToFileSync(Env* env, const Slice& data,
static std::string MakeFileName(const std::string& dbname, uint64_t number,
const char* suffix) {
char buf[100];
snprintf(buf, sizeof(buf), "/%06llu.%s",
static_cast<unsigned long long>(number), suffix);
std::snprintf(buf, sizeof(buf), "/%06llu.%s",
static_cast<unsigned long long>(number), suffix);
return dbname + buf;
}
@ -43,8 +43,8 @@ std::string SSTTableFileName(const std::string& dbname, uint64_t number) {
std::string DescriptorFileName(const std::string& dbname, uint64_t number) {
assert(number > 0);
char buf[100];
snprintf(buf, sizeof(buf), "/MANIFEST-%06llu",
static_cast<unsigned long long>(number));
std::snprintf(buf, sizeof(buf), "/MANIFEST-%06llu",
static_cast<unsigned long long>(number));
return dbname + buf;
}

9
db/leveldbutil.cc
View File

@ -28,7 +28,7 @@ bool HandleDumpCommand(Env* env, char** files, int num) {
for (int i = 0; i < num; i++) {
Status s = DumpFile(env, files[i], &printer);
if (!s.ok()) {
fprintf(stderr, "%s\n", s.ToString().c_str());
std::fprintf(stderr, "%s\n", s.ToString().c_str());
ok = false;
}
}
@ -39,9 +39,10 @@ bool HandleDumpCommand(Env* env, char** files, int num) {
} // namespace leveldb
static void Usage() {
fprintf(stderr,
"Usage: leveldbutil command...\n"
" dump files... -- dump contents of specified files\n");
std::fprintf(
stderr,
"Usage: leveldbutil command...\n"
" dump files... -- dump contents of specified files\n");
}
int main(int argc, char** argv) {

2
db/log_reader.cc
View File

@ -160,7 +160,7 @@ bool Reader::ReadRecord(Slice* record, std::string* scratch) {
default: {
char buf[40];
snprintf(buf, sizeof(buf), "unknown record type %u", record_type);
std::snprintf(buf, sizeof(buf), "unknown record type %u", record_type);
ReportCorruption(
(fragment.size() + (in_fragmented_record ? scratch->size() : 0)),
buf);

2
db/log_test.cc
View File

@ -27,7 +27,7 @@ static std::string BigString(const std::string& partial_string, size_t n) {
// Construct a string from a number
static std::string NumberString(int n) {
char buf[50];
snprintf(buf, sizeof(buf), "%d.", n);
std::snprintf(buf, sizeof(buf), "%d.", n);
return std::string(buf);
}

4
db/memtable.cc
View File

@ -88,12 +88,12 @@ void MemTable::Add(SequenceNumber s, ValueType type, const Slice& key,
val_size;
char* buf = arena_.Allocate(encoded_len);
char* p = EncodeVarint32(buf, internal_key_size);
memcpy(p, key.data(), key_size);
std::memcpy(p, key.data(), key_size);
p += key_size;
EncodeFixed64(p, (s << 8) | type);
p += 8;
p = EncodeVarint32(p, val_size);
memcpy(p, value.data(), val_size);
std::memcpy(p, value.data(), val_size);
assert(p + val_size == buf + encoded_len);
table_.Insert(buf);
}

13
db/recovery_test.cc
View File

@ -160,7 +160,8 @@ class RecoveryTest : public testing::Test {
TEST_F(RecoveryTest, ManifestReused) {
if (!CanAppend()) {
fprintf(stderr, "skipping test because env does not support appending\n");
std::fprintf(stderr,
"skipping test because env does not support appending\n");
return;
}
ASSERT_LEVELDB_OK(Put("foo", "bar"));
@ -176,7 +177,8 @@ TEST_F(RecoveryTest, ManifestReused) {
TEST_F(RecoveryTest, LargeManifestCompacted) {
if (!CanAppend()) {
fprintf(stderr, "skipping test because env does not support appending\n");
std::fprintf(stderr,
"skipping test because env does not support appending\n");
return;
}
ASSERT_LEVELDB_OK(Put("foo", "bar"));
@ -216,7 +218,8 @@ TEST_F(RecoveryTest, NoLogFiles) {
TEST_F(RecoveryTest, LogFileReuse) {
if (!CanAppend()) {
fprintf(stderr, "skipping test because env does not support appending\n");
std::fprintf(stderr,
"skipping test because env does not support appending\n");
return;
}
for (int i = 0; i < 2; i++) {
@ -249,7 +252,7 @@ TEST_F(RecoveryTest, MultipleMemTables) {
const int kNum = 1000;
for (int i = 0; i < kNum; i++) {
char buf[100];
snprintf(buf, sizeof(buf), "%050d", i);
std::snprintf(buf, sizeof(buf), "%050d", i);
ASSERT_LEVELDB_OK(Put(buf, buf));
}
ASSERT_EQ(0, NumTables());
@ -268,7 +271,7 @@ TEST_F(RecoveryTest, MultipleMemTables) {
ASSERT_NE(old_log_file, FirstLogFile()) << "must not reuse log";
for (int i = 0; i < kNum; i++) {
char buf[100];
snprintf(buf, sizeof(buf), "%050d", i);
std::snprintf(buf, sizeof(buf), "%050d", i);
ASSERT_EQ(buf, Get(buf));
}
}

3
db/repair.cc
View File

@ -372,7 +372,8 @@ class Repairer {
t.meta.largest);
}
// fprintf(stderr, "NewDescriptor:\n%s\n", edit_.DebugString().c_str());
// std::fprintf(stderr,
// "NewDescriptor:\n%s\n", edit_.DebugString().c_str());
{
log::Writer log(file);
std::string record;

2
db/skiplist_test.cc
View File

@ -346,7 +346,7 @@ static void RunConcurrent(int run) {
const int kSize = 1000;
for (int i = 0; i < N; i++) {
if ((i % 100) == 0) {
fprintf(stderr, "Run %d of %d\n", i, N);
std::fprintf(stderr, "Run %d of %d\n", i, N);
}
TestState state(seed + 1);
Env::Default()->Schedule(ConcurrentReader, &state);

19
db/version_set.cc
View File

@ -703,10 +703,10 @@ class VersionSet::Builder {
const InternalKey& prev_end = v->files_[level][i - 1]->largest;
const InternalKey& this_begin = v->files_[level][i]->smallest;
if (vset_->icmp_.Compare(prev_end, this_begin) >= 0) {
fprintf(stderr, "overlapping ranges in same level %s vs. %s\n",
prev_end.DebugString().c_str(),
this_begin.DebugString().c_str());
abort();
std::fprintf(stderr, "overlapping ranges in same level %s vs. %s\n",
prev_end.DebugString().c_str(),
this_begin.DebugString().c_str());
std::abort();
}
}
}
@ -1100,11 +1100,12 @@ int VersionSet::NumLevelFiles(int level) const {
const char* VersionSet::LevelSummary(LevelSummaryStorage* scratch) const {
// Update code if kNumLevels changes
static_assert(config::kNumLevels == 7, "");
snprintf(scratch->buffer, sizeof(scratch->buffer),
"files[ %d %d %d %d %d %d %d ]", int(current_->files_[0].size()),
int(current_->files_[1].size()), int(current_->files_[2].size()),
int(current_->files_[3].size()), int(current_->files_[4].size()),
int(current_->files_[5].size()), int(current_->files_[6].size()));
std::snprintf(
scratch->buffer, sizeof(scratch->buffer), "files[ %d %d %d %d %d %d %d ]",
int(current_->files_[0].size()), int(current_->files_[1].size()),
int(current_->files_[2].size()), int(current_->files_[3].size()),
int(current_->files_[4].size()), int(current_->files_[5].size()),
int(current_->files_[6].size()));
return scratch->buffer;
}

6
helpers/memenv/memenv.cc
View File

@ -93,7 +93,7 @@ class FileState {
if (avail > bytes_to_copy) {
avail = bytes_to_copy;
}
memcpy(dst, blocks_[block] + block_offset, avail);
std::memcpy(dst, blocks_[block] + block_offset, avail);
bytes_to_copy -= avail;
dst += avail;
@ -126,7 +126,7 @@ class FileState {
if (avail > src_len) {
avail = src_len;
}
memcpy(blocks_.back() + offset, src, avail);
std::memcpy(blocks_.back() + offset, src, avail);
src_len -= avail;
src += avail;
size_ += avail;
@ -215,7 +215,7 @@ class WritableFileImpl : public WritableFile {
class NoOpLogger : public Logger {
public:
void Logv(const char* format, va_list ap) override {}
void Logv(const char* format, std::va_list ap) override {}
};
class InMemoryEnv : public EnvWrapper {

2
include/leveldb/env.h
View File

@ -300,7 +300,7 @@ class LEVELDB_EXPORT Logger {
virtual ~Logger();
// Write an entry to the log file with the specified format.
virtual void Logv(const char* format, va_list ap) = 0;
virtual void Logv(const char* format, std::va_list ap) = 0;
};
// Identifies a locked file.

2
issues/issue178_test.cc
View File

@ -18,7 +18,7 @@ const int kNumKeys = 1100000;
std::string Key1(int i) {
char buf[100];
snprintf(buf, sizeof(buf), "my_key_%d", i);
std::snprintf(buf, sizeof(buf), "my_key_%d", i);
return buf;
}

32
table/table_test.cc
View File

@ -123,7 +123,7 @@ class StringSource : public RandomAccessFile {
if (offset + n > contents_.size()) {
n = contents_.size() - offset;
}
memcpy(scratch, &contents_[offset], n);
std::memcpy(scratch, &contents_[offset], n);
*result = Slice(scratch, n);
return Status::OK();
}
@ -485,13 +485,13 @@ class Harness : public testing::Test {
Iterator* iter = constructor_->NewIterator();
ASSERT_TRUE(!iter->Valid());
KVMap::const_iterator model_iter = data.begin();
if (kVerbose) fprintf(stderr, "---\n");
if (kVerbose) std::fprintf(stderr, "---\n");
for (int i = 0; i < 200; i++) {
const int toss = rnd->Uniform(5);
switch (toss) {
case 0: {
if (iter->Valid()) {
if (kVerbose) fprintf(stderr, "Next\n");
if (kVerbose) std::fprintf(stderr, "Next\n");
iter->Next();
++model_iter;
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
@ -500,7 +500,7 @@ class Harness : public testing::Test {
}
case 1: {
if (kVerbose) fprintf(stderr, "SeekToFirst\n");
if (kVerbose) std::fprintf(stderr, "SeekToFirst\n");
iter->SeekToFirst();
model_iter = data.begin();
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
@ -511,7 +511,7 @@ class Harness : public testing::Test {
std::string key = PickRandomKey(rnd, keys);
model_iter = data.lower_bound(key);
if (kVerbose)
fprintf(stderr, "Seek '%s'\n", EscapeString(key).c_str());
std::fprintf(stderr, "Seek '%s'\n", EscapeString(key).c_str());
iter->Seek(Slice(key));
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
break;
@ -519,7 +519,7 @@ class Harness : public testing::Test {
case 3: {
if (iter->Valid()) {
if (kVerbose) fprintf(stderr, "Prev\n");
if (kVerbose) std::fprintf(stderr, "Prev\n");
iter->Prev();
if (model_iter == data.begin()) {
model_iter = data.end(); // Wrap around to invalid value
@ -532,7 +532,7 @@ class Harness : public testing::Test {
}
case 4: {
if (kVerbose) fprintf(stderr, "SeekToLast\n");
if (kVerbose) std::fprintf(stderr, "SeekToLast\n");
iter->SeekToLast();
if (keys.empty()) {
model_iter = data.end();
@ -684,8 +684,8 @@ TEST_F(Harness, Randomized) {
for (int num_entries = 0; num_entries < 2000;
num_entries += (num_entries < 50 ? 1 : 200)) {
if ((num_entries % 10) == 0) {
fprintf(stderr, "case %d of %d: num_entries = %d\n", (i + 1),
int(kNumTestArgs), num_entries);
std::fprintf(stderr, "case %d of %d: num_entries = %d\n", (i + 1),
int(kNumTestArgs), num_entries);
}
for (int e = 0; e < num_entries; e++) {
std::string v;
@ -714,7 +714,7 @@ TEST_F(Harness, RandomizedLongDB) {
for (int level = 0; level < config::kNumLevels; level++) {
std::string value;
char name[100];
snprintf(name, sizeof(name), "leveldb.num-files-at-level%d", level);
std::snprintf(name, sizeof(name), "leveldb.num-files-at-level%d", level);
ASSERT_TRUE(db()->GetProperty(name, &value));
files += atoi(value.c_str());
}
@ -736,8 +736,8 @@ TEST(MemTableTest, Simple) {
Iterator* iter = memtable->NewIterator();
iter->SeekToFirst();
while (iter->Valid()) {
fprintf(stderr, "key: '%s' -> '%s'\n", iter->key().ToString().c_str(),
iter->value().ToString().c_str());
std::fprintf(stderr, "key: '%s' -> '%s'\n", iter->key().ToString().c_str(),
iter->value().ToString().c_str());
iter->Next();
}
@ -748,9 +748,9 @@ TEST(MemTableTest, Simple) {
static bool Between(uint64_t val, uint64_t low, uint64_t high) {
bool result = (val >= low) && (val <= high);
if (!result) {
fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
(unsigned long long)(val), (unsigned long long)(low),
(unsigned long long)(high));
std::fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
(unsigned long long)(val), (unsigned long long)(low),
(unsigned long long)(high));
}
return result;
}
@ -792,7 +792,7 @@ static bool SnappyCompressionSupported() {
TEST(TableTest, ApproximateOffsetOfCompressed) {
if (!SnappyCompressionSupported()) {
fprintf(stderr, "skipping compression tests\n");
std::fprintf(stderr, "skipping compression tests\n");
return;
}

15
util/bloom_test.cc
View File

@ -45,14 +45,14 @@ class BloomTest : public testing::Test {
size_t FilterSize() const { return filter_.size(); }
void DumpFilter() {
fprintf(stderr, "F(");
std::fprintf(stderr, "F(");
for (size_t i = 0; i + 1 < filter_.size(); i++) {
const unsigned int c = static_cast<unsigned int>(filter_[i]);
for (int j = 0; j < 8; j++) {
fprintf(stderr, "%c", (c & (1 << j)) ? '1' : '.');
std::fprintf(stderr, "%c", (c & (1 << j)) ? '1' : '.');
}
}
fprintf(stderr, ")\n");
std::fprintf(stderr, ")\n");
}
bool Matches(const Slice& s) {
@ -132,8 +132,9 @@ TEST_F(BloomTest, VaryingLengths) {
// Check false positive rate
double rate = FalsePositiveRate();
if (kVerbose >= 1) {
fprintf(stderr, "False positives: %5.2f%% @ length = %6d ; bytes = %6d\n",
rate * 100.0, length, static_cast<int>(FilterSize()));
std::fprintf(stderr,
"False positives: %5.2f%% @ length = %6d ; bytes = %6d\n",
rate * 100.0, length, static_cast<int>(FilterSize()));
}
ASSERT_LE(rate, 0.02); // Must not be over 2%
if (rate > 0.0125)
@ -142,8 +143,8 @@ TEST_F(BloomTest, VaryingLengths) {
good_filters++;
}
if (kVerbose >= 1) {
fprintf(stderr, "Filters: %d good, %d mediocre\n", good_filters,
mediocre_filters);
std::fprintf(stderr, "Filters: %d good, %d mediocre\n", good_filters,
mediocre_filters);
}
ASSERT_LE(mediocre_filters, good_filters / 5);
}

2
util/cache.cc
View File

@ -279,7 +279,7 @@ Cache::Handle* LRUCache::Insert(const Slice& key, uint32_t hash, void* value,
e->hash = hash;
e->in_cache = false;
e->refs = 1; // for the returned handle.
memcpy(e->key_data, key.data(), key.size());
std::memcpy(e->key_data, key.data(), key.size());
if (capacity_ > 0) {
e->refs++; // for the cache's reference.

4
util/env.cc
View File

@ -4,6 +4,8 @@
#include "leveldb/env.h"
#include <cstdarg>
// This workaround can be removed when leveldb::Env::DeleteFile is removed.
// See env.h for justification.
#if defined(_WIN32) && defined(LEVELDB_DELETEFILE_UNDEFINED)
@ -38,7 +40,7 @@ FileLock::~FileLock() = default;
void Log(Logger* info_log, const char* format, ...) {
if (info_log != nullptr) {
va_list ap;
std::va_list ap;
va_start(ap, format);
info_log->Logv(format, ap);
va_end(ap);

6
util/env_posix_test.cc
View File

@ -149,7 +149,7 @@ void CheckCloseOnExecDoesNotLeakFDs(
if (child_pid == kForkInChildProcessReturnValue) {
::execv(child_argv[0], child_argv);
std::fprintf(stderr, "Error spawning child process: %s\n", strerror(errno));
std::exit(kTextCloseOnExecHelperExecFailedCode);
std::std::exit(kTextCloseOnExecHelperExecFailedCode);
}
int child_status = 0;
@ -187,11 +187,11 @@ TEST_F(EnvPosixTest, TestOpenOnRead) {
ASSERT_LEVELDB_OK(env_->GetTestDirectory(&test_dir));
std::string test_file = test_dir + "/open_on_read.txt";
FILE* f = fopen(test_file.c_str(), "we");
FILE* f = std::fopen(test_file.c_str(), "we");
ASSERT_TRUE(f != nullptr);
const char kFileData[] = "abcdefghijklmnopqrstuvwxyz";
fputs(kFileData, f);
fclose(f);
std::fclose(f);
// Open test file some number above the sum of the two limits to force
// open-on-read behavior of POSIX Env leveldb::RandomAccessFile.

4
util/env_windows_test.cc
View File

@ -29,11 +29,11 @@ TEST_F(EnvWindowsTest, TestOpenOnRead) {
ASSERT_LEVELDB_OK(env_->GetTestDirectory(&test_dir));
std::string test_file = test_dir + "/open_on_read.txt";
FILE* f = fopen(test_file.c_str(), "w");
FILE* f = std::fopen(test_file.c_str(), "w");
ASSERT_TRUE(f != nullptr);
const char kFileData[] = "abcdefghijklmnopqrstuvwxyz";
fputs(kFileData, f);
fclose(f);
std::fclose(f);
// Open test file some number above the sum of the two limits to force
// leveldb::WindowsEnv to switch from mapping the file into memory

20
util/histogram.cc
View File

@ -241,11 +241,11 @@ double Histogram::StandardDeviation() const {
std::string Histogram::ToString() const {
std::string r;
char buf[200];
snprintf(buf, sizeof(buf), "Count: %.0f Average: %.4f StdDev: %.2f\n", num_,
Average(), StandardDeviation());
std::snprintf(buf, sizeof(buf), "Count: %.0f Average: %.4f StdDev: %.2f\n",
num_, Average(), StandardDeviation());
r.append(buf);
snprintf(buf, sizeof(buf), "Min: %.4f Median: %.4f Max: %.4f\n",
(num_ == 0.0 ? 0.0 : min_), Median(), max_);
std::snprintf(buf, sizeof(buf), "Min: %.4f Median: %.4f Max: %.4f\n",
(num_ == 0.0 ? 0.0 : min_), Median(), max_);
r.append(buf);
r.append("------------------------------------------------------\n");
const double mult = 100.0 / num_;
@ -253,12 +253,12 @@ std::string Histogram::ToString() const {
for (int b = 0; b < kNumBuckets; b++) {
if (buckets_[b] <= 0.0) continue;
sum += buckets_[b];
snprintf(buf, sizeof(buf), "[ %7.0f, %7.0f ) %7.0f %7.3f%% %7.3f%% ",
((b == 0) ? 0.0 : kBucketLimit[b - 1]), // left
kBucketLimit[b], // right
buckets_[b], // count
mult * buckets_[b], // percentage
mult * sum); // cumulative percentage
std::snprintf(buf, sizeof(buf), "[ %7.0f, %7.0f ) %7.0f %7.3f%% %7.3f%% ",
((b == 0) ? 0.0 : kBucketLimit[b - 1]), // left
kBucketLimit[b], // right
buckets_[b], // count
mult * buckets_[b], // percentage
mult * sum); // cumulative percentage
r.append(buf);
// Add hash marks based on percentage; 20 marks for 100%.

6
util/logging.cc
View File

@ -16,7 +16,7 @@ namespace leveldb {
void AppendNumberTo(std::string* str, uint64_t num) {
char buf[30];
snprintf(buf, sizeof(buf), "%llu", (unsigned long long)num);
std::snprintf(buf, sizeof(buf), "%llu", static_cast<unsigned long long>(num));
str->append(buf);
}
@ -27,8 +27,8 @@ void AppendEscapedStringTo(std::string* str, const Slice& value) {
str->push_back(c);
} else {
char buf[10];
snprintf(buf, sizeof(buf), "\\x%02x",
static_cast<unsigned int>(c) & 0xff);
std::snprintf(buf, sizeof(buf), "\\x%02x",
static_cast<unsigned int>(c) & 0xff);
str->append(buf);
}
}

8
util/posix_logger.h
View File

@ -30,7 +30,7 @@ class PosixLogger final : public Logger {
~PosixLogger() override { std::fclose(fp_); }
void Logv(const char* format, va_list arguments) override {
void Logv(const char* format, std::va_list arguments) override {
// Record the time as close to the Logv() call as possible.
struct ::timeval now_timeval;
::gettimeofday(&now_timeval, nullptr);
@ -62,7 +62,7 @@ class PosixLogger final : public Logger {
(iteration == 0) ? stack_buffer : new char[dynamic_buffer_size];
// Print the header into the buffer.
int buffer_offset = snprintf(
int buffer_offset = std::snprintf(
buffer, buffer_size, "%04d/%02d/%02d-%02d:%02d:%02d.%06d %s ",
now_components.tm_year + 1900, now_components.tm_mon + 1,
now_components.tm_mday, now_components.tm_hour, now_components.tm_min,
@ -98,8 +98,8 @@ class PosixLogger final : public Logger {
}
// The dynamically-allocated buffer was incorrectly sized. This should
// not happen, assuming a correct implementation of (v)snprintf. Fail
// in tests, recover by truncating the log message in production.
// not happen, assuming a correct implementation of std::(v)snprintf.
// Fail in tests, recover by truncating the log message in production.
assert(false);
buffer_offset = buffer_size - 1;
}

16
util/status.cc
View File

@ -12,9 +12,9 @@ namespace leveldb {
const char* Status::CopyState(const char* state) {
uint32_t size;
memcpy(&size, state, sizeof(size));
std::memcpy(&size, state, sizeof(size));
char* result = new char[size + 5];
memcpy(result, state, size + 5);
std::memcpy(result, state, size + 5);
return result;
}
@ -24,13 +24,13 @@ Status::Status(Code code, const Slice& msg, const Slice& msg2) {
const uint32_t len2 = static_cast<uint32_t>(msg2.size());
const uint32_t size = len1 + (len2 ? (2 + len2) : 0);
char* result = new char[size + 5];
memcpy(result, &size, sizeof(size));
std::memcpy(result, &size, sizeof(size));
result[4] = static_cast<char>(code);
memcpy(result + 5, msg.data(), len1);
std::memcpy(result + 5, msg.data(), len1);
if (len2) {
result[5 + len1] = ':';
result[6 + len1] = ' ';
memcpy(result + 7 + len1, msg2.data(), len2);
std::memcpy(result + 7 + len1, msg2.data(), len2);
}
state_ = result;
}
@ -61,14 +61,14 @@ std::string Status::ToString() const {
type = "IO error: ";
break;
default:
snprintf(tmp, sizeof(tmp),
"Unknown code(%d): ", static_cast<int>(code()));
std::snprintf(tmp, sizeof(tmp),
"Unknown code(%d): ", static_cast<int>(code()));
type = tmp;
break;
}
std::string result(type);
uint32_t length;
memcpy(&length, state_, sizeof(length));
std::memcpy(&length, state_, sizeof(length));
result.append(state_ + 5, length);
return result;
}

8
util/windows_logger.h
View File

@ -27,7 +27,7 @@ class WindowsLogger final : public Logger {
~WindowsLogger() override { std::fclose(fp_); }
void Logv(const char* format, va_list arguments) override {
void Logv(const char* format, std::va_list arguments) override {
// Record the time as close to the Logv() call as possible.
SYSTEMTIME now_components;
::GetLocalTime(&now_components);
@ -56,7 +56,7 @@ class WindowsLogger final : public Logger {
(iteration == 0) ? stack_buffer : new char[dynamic_buffer_size];
// Print the header into the buffer.
int buffer_offset = snprintf(
int buffer_offset = std::snprintf(
buffer, buffer_size, "%04d/%02d/%02d-%02d:%02d:%02d.%06d %s ",
now_components.wYear, now_components.wMonth, now_components.wDay,
now_components.wHour, now_components.wMinute, now_components.wSecond,
@ -92,8 +92,8 @@ class WindowsLogger final : public Logger {
}
// The dynamically-allocated buffer was incorrectly sized. This should
// not happen, assuming a correct implementation of (v)snprintf. Fail
// in tests, recover by truncating the log message in production.
// not happen, assuming a correct implementation of std::(v)snprintf.
// Fail in tests, recover by truncating the log message in production.
assert(false);
buffer_offset = buffer_size - 1;
}