feat: string cmd incr

src/base_cmd.h

@@ -40,6 +40,7 @@ const std::string kCmdNameGetset = "getset";
 const std::string kCmdNameMget = "mget";
 const std::string kCmdNameMset = "mset";
 const std::string kCmdNameBitCount = "bitcount";
+const std::string kCmdNameIncr = "incr";
 
 const std::string kCmdNameAuth = "auth";
 

src/cmd_kv.cc

@@ -215,4 +215,33 @@ void BitCountCmd::DoCmd(PClient* client) {
   client->AppendInteger(static_cast<int64_t>(count));
 }
 
+IncrCmd::IncrCmd(const std::string& name, int16_t arity)
+    : BaseCmd(name, arity, CmdFlagsReadonly, AclCategoryRead | AclCategoryString) {}
+
+bool IncrCmd::DoInitial(pikiwidb::PClient *client) {
+    client->SetKey(client->argv_[1]);
+    return true;
+}
+
+void IncrCmd::DoCmd(pikiwidb::PClient *client) {
+    PObject* value = nullptr;
+    PError err = PSTORE.GetValueByType(client->Key(),value,PType_string);
+    if(err == PError_notExist){
+        client->SetRes(CmdRes::kNotFound);
+    }
+
+    if(err != PError_ok){
+        client->SetRes(CmdRes::kErrOther);
+    }
+
+    if(value->encoding != PEncode_int){
+        client->SetRes(CmdRes::kOk);
+    }
+
+    intptr_t oldVal = (intptr_t)value->value;
+    value->Reset((void*)(oldVal+1));
+
+    client->AppendInteger(oldVal+1);
+}
+
 }  // namespace pikiwidb

src/cmd_kv.h

@@ -88,4 +88,15 @@ class BitCountCmd : public BaseCmd {
   void DoCmd(PClient *client) override;
 };
 
+class IncrCmd : public BaseCmd {
+public:
+    IncrCmd(const std::string &name,int16_t arity);
+
+protected:
+    bool DoInitial(PClient *client) override;
+
+private:
+    void DoCmd(PClient *client) override;
+};
+
 }  // namespace pikiwidb

src/cmd_table_manager.cc

@@ -42,6 +42,8 @@ void CmdTableManager::InitCmdTable() {
   cmds_->insert(std::make_pair(kCmdNameMset, std::move(msetPtr)));
   std::unique_ptr<BaseCmd> bitcountPtr = std::make_unique<BitCountCmd>(kCmdNameBitCount, -2);
   cmds_->insert(std::make_pair(kCmdNameBitCount, std::move(bitcountPtr)));
+  std::unique_ptr<BaseCmd> incrPtr = std::make_unique<IncrCmd>(kCmdNameIncr, 2);
+  cmds_->insert(std::make_pair(kCmdNameIncr, std::move(incrPtr)));
 }
 
 std::pair<BaseCmd*, CmdRes::CmdRet> CmdTableManager::GetCommand(const std::string& cmdName, PClient* client) {

src/command.cc

@@ -65,7 +65,6 @@ const PCommandInfo PCommandTable::s_info[] = {
     {"bitop", PAttr_write, -4, &bitop},
     {"getbit", PAttr_read, 3, &getbit},
     {"setbit", PAttr_write, 4, &setbit},
-    {"incr", PAttr_write, 2, &incr},
     {"decr", PAttr_write, 2, &decr},
     {"incrby", PAttr_write, 3, &incrby},
     {"incrbyfloat", PAttr_write, 3, &incrbyfloat},