{"id":140149,"date":"2020-07-20T13:13:24","date_gmt":"2020-07-20T05:13:24","guid":{"rendered":"http:\/\/4563.org\/?p=140149"},"modified":"2020-07-20T13:13:24","modified_gmt":"2020-07-20T05:13:24","slug":"redis-%e6%ba%90%e7%a0%81-sds-%e7%9a%84%e7%bb%93%e6%9e%84%e4%bd%93%e4%bd%bf%e7%94%a8-c-%e8%af%ad%e8%a8%80%e7%9a%84%e4%bb%80%e4%b9%88%e9%ad%94%e6%b3%95","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=140149","title":{"rendered":"redis \u6e90\u7801 sds \u7684\u7ed3\u6784\u4f53\u4f7f\u7528 c \u8bed\u8a00\u7684\u4ec0\u4e48\u9b54\u6cd5"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  redis \u6e90\u7801 sds \u7684\u7ed3\u6784\u4f53\u4f7f\u7528 c \u8bed\u8a00\u7684\u4ec0\u4e48\u9b54\u6cd5               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : dayoushen <\/span>  <span><i><\/i> 4<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<pre><code>struct sdshdr {     long len;     long free;     char buf[]; }; <\/code><\/pre>\n<p>\u5982\u4e0a\uff0c\u8fd9\u4e2a char buf[] \u7adf\u7136\u4e0d\u5360\u5185\u5b58\uff0c\u5728 64 \u4f4d\u7cfb\u7edf sizeof(long)=8,sizeof(sdshdr)=16 \u3002\u95ee\u9898\u662f\u8fd9\u4e2a buf \u4e3a\u4ec0\u4e48\u4e0d\u5360\u5185\u5b58\uff0c\u4e0d\u80fd\u7406\u89e3\u4e3a char * \uff1f\u7136\u540e\u4f7f\u7528\u4e2d sdshdr * newsds = (sdshdr * )malloc(sizeof(sdshdr) + initlen + 1),newsds-&gt;buf \u53c8\u53ef\u4ee5\u64cd\u4f5c\u540e\u9762\u7684\u5b57\u7b26\u3002<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>4<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"2664162\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : pocarisweat <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u8fd9\u662f c99 \u7684\u65b0\u8bed\u6cd5\uff0c\u53ea\u80fd\u653e\u5728\u6700\u540e\uff0c\u591a\u5206\u914d\u51fa\u6765\u7684\u5185\u5b58\u5c31\u53ef\u4ee5\u5f53\u4f5c\u8fd9\u4e2a\u6570\u7ec4\u7684\u5185\u5bb9\u3002char buf[0]\u610f\u601d\u5dee\u4e0d\u591a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2664163\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : linvon <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u641c\u7d22 \u67d4\u6027\u6570\u7ec4                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2664164\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : dayoushen <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u8c22 1,2 \uff0c\u61c2\u4e86\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2664165\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : wnpllrzodiac <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u8001\u7684\u4e66\u5199\u7684\u4e1c\u897f\u90fd\u4e0d\u5bf9\u4e86\uff0c\u5c34\u5c2c\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>redis \u6e90\u7801 sds \u7684\u7ed3\u6784\u4f53&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/140149"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=140149"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/140149\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=140149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=140149"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=140149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}