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-rw-r--r--src/leveldb/table/block.cc69
1 files changed, 34 insertions, 35 deletions
diff --git a/src/leveldb/table/block.cc b/src/leveldb/table/block.cc
index 43e402c9c0..2fe89eaa45 100644
--- a/src/leveldb/table/block.cc
+++ b/src/leveldb/table/block.cc
@@ -6,8 +6,10 @@
#include "table/block.h"
-#include <vector>
#include <algorithm>
+#include <cstdint>
+#include <vector>
+
#include "leveldb/comparator.h"
#include "table/format.h"
#include "util/coding.h"
@@ -27,7 +29,7 @@ Block::Block(const BlockContents& contents)
if (size_ < sizeof(uint32_t)) {
size_ = 0; // Error marker
} else {
- size_t max_restarts_allowed = (size_-sizeof(uint32_t)) / sizeof(uint32_t);
+ size_t max_restarts_allowed = (size_ - sizeof(uint32_t)) / sizeof(uint32_t);
if (NumRestarts() > max_restarts_allowed) {
// The size is too small for NumRestarts()
size_ = 0;
@@ -48,27 +50,26 @@ Block::~Block() {
// and the length of the value in "*shared", "*non_shared", and
// "*value_length", respectively. Will not dereference past "limit".
//
-// If any errors are detected, returns NULL. Otherwise, returns a
+// If any errors are detected, returns nullptr. Otherwise, returns a
// pointer to the key delta (just past the three decoded values).
static inline const char* DecodeEntry(const char* p, const char* limit,
- uint32_t* shared,
- uint32_t* non_shared,
+ uint32_t* shared, uint32_t* non_shared,
uint32_t* value_length) {
- if (limit - p < 3) return NULL;
- *shared = reinterpret_cast<const unsigned char*>(p)[0];
- *non_shared = reinterpret_cast<const unsigned char*>(p)[1];
- *value_length = reinterpret_cast<const unsigned char*>(p)[2];
+ if (limit - p < 3) return nullptr;
+ *shared = reinterpret_cast<const uint8_t*>(p)[0];
+ *non_shared = reinterpret_cast<const uint8_t*>(p)[1];
+ *value_length = reinterpret_cast<const uint8_t*>(p)[2];
if ((*shared | *non_shared | *value_length) < 128) {
// Fast path: all three values are encoded in one byte each
p += 3;
} else {
- if ((p = GetVarint32Ptr(p, limit, shared)) == NULL) return NULL;
- if ((p = GetVarint32Ptr(p, limit, non_shared)) == NULL) return NULL;
- if ((p = GetVarint32Ptr(p, limit, value_length)) == NULL) return NULL;
+ if ((p = GetVarint32Ptr(p, limit, shared)) == nullptr) return nullptr;
+ if ((p = GetVarint32Ptr(p, limit, non_shared)) == nullptr) return nullptr;
+ if ((p = GetVarint32Ptr(p, limit, value_length)) == nullptr) return nullptr;
}
if (static_cast<uint32_t>(limit - p) < (*non_shared + *value_length)) {
- return NULL;
+ return nullptr;
}
return p;
}
@@ -76,9 +77,9 @@ static inline const char* DecodeEntry(const char* p, const char* limit,
class Block::Iter : public Iterator {
private:
const Comparator* const comparator_;
- const char* const data_; // underlying block contents
- uint32_t const restarts_; // Offset of restart array (list of fixed32)
- uint32_t const num_restarts_; // Number of uint32_t entries in restart array
+ const char* const data_; // underlying block contents
+ uint32_t const restarts_; // Offset of restart array (list of fixed32)
+ uint32_t const num_restarts_; // Number of uint32_t entries in restart array
// current_ is offset in data_ of current entry. >= restarts_ if !Valid
uint32_t current_;
@@ -112,9 +113,7 @@ class Block::Iter : public Iterator {
}
public:
- Iter(const Comparator* comparator,
- const char* data,
- uint32_t restarts,
+ Iter(const Comparator* comparator, const char* data, uint32_t restarts,
uint32_t num_restarts)
: comparator_(comparator),
data_(data),
@@ -125,23 +124,23 @@ class Block::Iter : public Iterator {
assert(num_restarts_ > 0);
}
- virtual bool Valid() const { return current_ < restarts_; }
- virtual Status status() const { return status_; }
- virtual Slice key() const {
+ bool Valid() const override { return current_ < restarts_; }
+ Status status() const override { return status_; }
+ Slice key() const override {
assert(Valid());
return key_;
}
- virtual Slice value() const {
+ Slice value() const override {
assert(Valid());
return value_;
}
- virtual void Next() {
+ void Next() override {
assert(Valid());
ParseNextKey();
}
- virtual void Prev() {
+ void Prev() override {
assert(Valid());
// Scan backwards to a restart point before current_
@@ -162,7 +161,7 @@ class Block::Iter : public Iterator {
} while (ParseNextKey() && NextEntryOffset() < original);
}
- virtual void Seek(const Slice& target) {
+ void Seek(const Slice& target) override {
// Binary search in restart array to find the last restart point
// with a key < target
uint32_t left = 0;
@@ -171,10 +170,10 @@ class Block::Iter : public Iterator {
uint32_t mid = (left + right + 1) / 2;
uint32_t region_offset = GetRestartPoint(mid);
uint32_t shared, non_shared, value_length;
- const char* key_ptr = DecodeEntry(data_ + region_offset,
- data_ + restarts_,
- &shared, &non_shared, &value_length);
- if (key_ptr == NULL || (shared != 0)) {
+ const char* key_ptr =
+ DecodeEntry(data_ + region_offset, data_ + restarts_, &shared,
+ &non_shared, &value_length);
+ if (key_ptr == nullptr || (shared != 0)) {
CorruptionError();
return;
}
@@ -202,12 +201,12 @@ class Block::Iter : public Iterator {
}
}
- virtual void SeekToFirst() {
+ void SeekToFirst() override {
SeekToRestartPoint(0);
ParseNextKey();
}
- virtual void SeekToLast() {
+ void SeekToLast() override {
SeekToRestartPoint(num_restarts_ - 1);
while (ParseNextKey() && NextEntryOffset() < restarts_) {
// Keep skipping
@@ -237,7 +236,7 @@ class Block::Iter : public Iterator {
// Decode next entry
uint32_t shared, non_shared, value_length;
p = DecodeEntry(p, limit, &shared, &non_shared, &value_length);
- if (p == NULL || key_.size() < shared) {
+ if (p == nullptr || key_.size() < shared) {
CorruptionError();
return false;
} else {
@@ -253,7 +252,7 @@ class Block::Iter : public Iterator {
}
};
-Iterator* Block::NewIterator(const Comparator* cmp) {
+Iterator* Block::NewIterator(const Comparator* comparator) {
if (size_ < sizeof(uint32_t)) {
return NewErrorIterator(Status::Corruption("bad block contents"));
}
@@ -261,7 +260,7 @@ Iterator* Block::NewIterator(const Comparator* cmp) {
if (num_restarts == 0) {
return NewEmptyIterator();
} else {
- return new Iter(cmp, data_, restart_offset_, num_restarts);
+ return new Iter(comparator, data_, restart_offset_, num_restarts);
}
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-02 04:15:00 +0000