From 22f73b0644c4aa3c86affb468fba33649191176e Mon Sep 17 00:00:00 2001
From: zeekling <lingzhaohui@zeekling.cn>
Date: Wed, 11 Nov 2020 21:01:36 +0800
Subject: [PATCH] =?UTF-8?q?=E9=98=85=E8=AF=BBstrlen?=
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---
 src/object.c   | 5 +++++
 src/t_string.c | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/src/object.c b/src/object.c
index e971ef5..f0542dc 100644
--- a/src/object.c
+++ b/src/object.c
@@ -611,11 +611,16 @@ int equalStringObjects(robj *a, robj *b) {
     }
 }
 
+/**
+ * 计算value的长度。
+ * */
 size_t stringObjectLen(robj *o) {
     serverAssertWithInfo(NULL,o,o->type == OBJ_STRING);
     if (sdsEncodedObject(o)) {
+        // 对于字符串类型使用sdslen计算
         return sdslen(o->ptr);
     } else {
+        // 对于非字符串使用
         return sdigits10((long)o->ptr);
     }
 }
diff --git a/src/t_string.c b/src/t_string.c
index c75a40d..6c94a4c 100644
--- a/src/t_string.c
+++ b/src/t_string.c
@@ -495,6 +495,9 @@ void appendCommand(client *c) {
     addReplyLongLong(c,totlen);
 }
 
+/**
+ * strlen 命令实现
+ * */
 void strlenCommand(client *c) {
     robj *o;
     if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||