fix: rdb load bugs

Author: ZYunfeii

server/db.cc

@@ -59,6 +59,7 @@ int MiniKVDB::setExpire(std::string key, uint64_t expires) {
 }
 
 void MiniKVDB::rdbSave() {
+    // TODO: save the expire time
     std::unique_lock<std::shared_mutex> lk(smutex_);
     kvlogi("rdb save triggered!");
     io_->clearFile();
@@ -187,11 +188,11 @@ void MiniKVDB::rdbLoadEntry() {
 }
 
 void MiniKVDB::rdbFileReadInitDB() {
-    if (io_->emptyFile()) {
+    if (io_->empty()) {
         kvlogi("No rdb file to load.");
         return;
     }
-    while (!io_->reachEOF()) {
+    while (!io_->empty()) {
         rdbLoadEntry();
     }
     kvlogi("Rdb file loaded.");

server/db.h

@@ -48,6 +48,7 @@ typedef class MiniKVDB {
     void rdbFileReadInitDB();
     void rdbLoadEntry();
     void rdbSave();
+    // void fixedTimeDeleteExpiredKey();
 public:
     void insert(std::string key, std::string val, uint32_t encoding);
     void get(std::string key, std::vector<std::string>& res);

server/io.h

@@ -33,7 +33,7 @@ class KVio {
     bool reachEOF() {
         return feof(fp_);
     }
-    bool emptyFile() {
+    bool empty() {
         if (!fp_) return true;
         getc(fp_);
         if (feof(fp_)) {