{"id":989,"date":"2023-12-14T19:51:38","date_gmt":"2023-12-14T11:51:38","guid":{"rendered":"https:\/\/www.fanhangame.ltd\/?p=989"},"modified":"2024-04-04T22:16:57","modified_gmt":"2024-04-04T14:16:57","slug":"js%e6%95%b4%e5%bd%a2int%e5%92%8cbyte%e6%95%b0%e7%bb%84%e4%ba%92%e7%9b%b8%e8%bd%ac%e6%8d%a2","status":"publish","type":"post","link":"https:\/\/www.fanhangame.ltd\/?p=989","title":{"rendered":"JS\u6574\u5f62int\u548cbyte\u6570\u7ec4\u4e92\u76f8\u8f6c\u6362"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code> \r\n\/\/\u5c0f\u7aef\u6a21\u5f0f\r\nfunction BytesToIntLittleEndian(bytes){\r\n    var val = 0;\r\n    for (var i = bytes.length - 1; i >= 0; i--) {        \r\n        val += bytes&#91;i];    \r\n        if (i != 0) {\r\n            val = val &lt;&lt; 8;\r\n        }    \r\n    }\r\n    return val;\r\n}\r\n \r\n\/\/\u5c0f\u7aef\u6a21\u5f0f\r\n\/\/number \u8981\u8f6c\u6362\u7684\u6574\u5f62\u6570\u503c\r\n\/\/length \u8981\u8f6c\u6210\u4ec0\u4e48byte\u6570\u7ec4\uff0c\u89c4\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\r\n\/\/\u5982uint16\uff0c\u5219lenght=2\u8868\u793a\u4e24\u4e2a\u5b57\u8282\uff0c\u8f6c\u6210\u7684byte\u6570\u7ec4\u957f\u5ea6\u662flength=2\r\n\/\/\u5982uint32\uff0c\u5219lenght=2\u8868\u793a\u4e24\u4e2a\u5b57\u8282\uff0c\u8f6c\u6210\u7684byte\u6570\u7ec4\u957f\u5ea6\u662flength=4\r\nfunction IntToBytesLittleEndian(number, length){\r\n    var bytes = &#91;];\r\n    var i = 0;\r\n    do {\r\n    bytes&#91;i++] = number &amp; (255);\r\n    number = number>>8;\r\n    } while ( i &lt; length )\r\n    return bytes;\r\n}\r\n \r\n\/\/\u5927\u7aef\u6a21\u5f0f\r\nfunction BytesToIntBigEndian(bytes){\r\n    var val = 0;\r\n    for (var i = 0; i &lt; bytes.length; ++i) {        \r\n        val += bytes&#91;i];        \r\n        if (i &lt; bytes.length-1) {\r\n            val = val &lt;&lt; 8;\r\n        }\r\n    }\r\n    return val;\r\n}\r\n \r\n\/\/\u5927\u7aef\u6a21\u5f0f\r\n\/\/number \u8981\u8f6c\u6362\u7684\u6574\u5f62\u6570\u503c\r\n\/\/length \u8981\u8f6c\u6210\u4ec0\u4e48byte\u6570\u7ec4\uff0c\u89c4\u5b9a\u6570\u7ec4\u7684\u957f\u5ea6\r\n\/\/\u5982uint16\uff0c\u5219lenght=2\u8868\u793a\u4e24\u4e2a\u5b57\u8282\uff0c\u8f6c\u6210\u7684byte\u6570\u7ec4\u957f\u5ea6\u662flength=2\r\n\/\/\u5982uint32\uff0c\u5219lenght=2\u8868\u793a\u4e24\u4e2a\u5b57\u8282\uff0c\u8f6c\u6210\u7684byte\u6570\u7ec4\u957f\u5ea6\u662flength=4\r\nfunction IntToBytesBigEndian(number, length){\r\n    var bytes = &#91;];\r\n    var i = length;\r\n    do {\r\n    bytes&#91;--i] = number &amp; (255);\r\n    number = number>>8;\r\n    } while (i)\r\n    return bytes;\r\n}\r\n \r\n \r\n\/\/\u6d4b\u8bd5\u5c0f\u7aef\u6a21\u5f0f\r\ni = 65537\r\nbs = IntToBytesLittleEndian(i, 4)\r\nconsole.log(bs)\r\nconsole.log(BytesToIntLittleEndian(bs))\r\n \r\n\/\/\u6d4b\u8bd5\u5927\u7aef\u6a21\u5f0f\r\nbs = IntToBytesBigEndian(i, 2)\r\nconsole.log(bs)\r\nconsole.log(BytesToIntBigEndian(bs))<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":1067,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-989","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","h-entry","h-as-article"],"_links":{"self":[{"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=\/wp\/v2\/posts\/989","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=989"}],"version-history":[{"count":1,"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=\/wp\/v2\/posts\/989\/revisions"}],"predecessor-version":[{"id":990,"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=\/wp\/v2\/posts\/989\/revisions\/990"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=\/wp\/v2\/media\/1067"}],"wp:attachment":[{"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=989"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=989"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fanhangame.ltd\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}