{"id":456,"date":"2015-10-30T14:07:00","date_gmt":"2015-10-30T06:07:00","guid":{"rendered":"http:\/\/www.wangkaixuan.tech\/?p=456"},"modified":"2020-08-08T14:08:15","modified_gmt":"2020-08-08T06:08:15","slug":"%e5%a4%a7%e7%ab%af%e5%ba%8f%e3%80%81%e5%b0%8f%e7%ab%af%e5%ba%8f%e3%80%81%e7%bd%91%e7%bb%9c%e5%ad%97%e8%8a%82%e5%ba%8f","status":"publish","type":"post","link":"http:\/\/www.wangkaixuan.tech\/?p=456","title":{"rendered":"\u5927\u7aef\u5e8f\u3001\u5c0f\u7aef\u5e8f\u3001\u7f51\u7edc\u5b57\u8282\u5e8f"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1.\u5927\u7aef\u5e8f\u3001\u5c0f\u7aef\u5e8f<\/h2>\n\n\n\n<p>\u8d44\u6599\u6765\u6e90\uff1a\u300aUNIX\u7f51\u7edc\u7f16\u7a0b \u53771\u300b 3.4 \u5b57\u8282\u6392\u5e8f\u51fd\u6570<\/p>\n\n\n\n<p>\u5bf9\u4e8e\u4e00\u4e2a16\u4f4d\u7684\u6574\u6570\uff0c\u4ed6\u7531\u4e24\u4e2a\u5b57\u8282\u7ec4\u6210\u3002\u5185\u5b58\u4e2d\u5b58\u50a8\u8fd9\u4e24\u4e2a\u5b57\u8282\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4e00\u79cd\u662f\u5c06\u4f4e\u5e8f\u5b57\u8282\u5b58\u50a8\u5728\u8d77\u59cb\u5730\u5740\uff0c\u79f0\u4e3a\u5c0f\u7aef\uff08little-endian\uff09\u5b57\u8282\u5e8f\uff1b\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u5c06\u9ad8\u5e8f\u5b57\u8282\u5b58\u50a8\u5728\u8d77\u59cb\u5730\u5740\uff0c\u79f0\u4e3a\u5927\u7aef\uff08big-endian\uff09\u5b57\u8282\u5e8f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"613\" height=\"379\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image.png\" alt=\"\" class=\"wp-image-459\"\/><\/figure>\n\n\n\n<p>\uff0a\u672f\u8bed<strong>\u5927\u7aef<\/strong>\u548c<strong>\u5c0f\u7aef<\/strong>\u8868\u793a\u591a\u5b57\u8282\u6574\u6570\u7684\u54ea\u4e00\u7aef\uff08\u5c0f\u7aef\u548c\u5927\u7aef\uff09\u5b58\u50a8\u5728\u8be5\u503c\u7684\u8d77\u59cb\u5730\u5740\u3002<\/p>\n\n\n\n<p>\uff0a\u6211\u4eec\u628a\u67d0\u4e2a\u7ed9\u5b9a\u7cfb\u7edf\u6240\u7528\u7684\u5b57\u8282\u5e8f\u79f0\u4e3a\u4e3b\u673a\u5b57\u8282\u5e8f\u3002<\/p>\n\n\n\n<p>\uff0a\u5f53\u4eca\u6709\u4e0d\u5c11\u7cfb\u7edf\u80fd\u591f\u5728\u7cfb\u7edf\u590d\u4f4d\u65f6(\u4f8b\u5982MIPS 2000)\uff0c\u6216\u8005\u5728\u7cfb\u7edf\u8fd0\u884c\u4e4b\u65f6(\u4f8b\u5982Intel i860)\uff0c\u5728\u5927\u5c0f\u7aef\u5b57\u8282\u5e8f\u4e4b\u95f4\u5207\u6362<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.\u5b9e\u9a8c<\/h2>\n\n\n\n<p>\u901a\u8fc7\u4e0b\u9762\u7684\u7a0b\u5e8f\u53ef\u4ee5\u6d4b\u8bd5\u4f60\u7684\u4e3b\u673a\u662f\u4ec0\u4e48\u5b57\u8282\u5e8f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*************************************************************************\n\t> File Name: byte_test.c\n\t> Author: Jack Wong\n\t> Mail: pandawkx@163.com\n\t> Created Time: Fri 30 Oct 2015 08:36:58 AM CST\n ************************************************************************\/\n#include &lt;stdio.h>\n\nint main()\n{\n    union{\n        short s;\n        char c&#91;sizeof(short)];\n    }un;\n\n    un.s = 0x0102;\n    if(sizeof(short) == 2)\n    {\n        if(un.c&#91;0] == 1 &amp;&amp; un.c&#91;1] == 2)\n            printf(\"big-endian\\n\");\n        else if(un.c&#91;0] == 2 &amp;&amp; un.c&#91;1] == 1)\n            printf(\"little-endian\\n\");\n        else\n            printf(\"unknown\\n\");\n    }\n    else\n        printf(\"sizeof(short) = %d\\n\",sizeof(short));\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p>1.\u8054\u60f3\u7b14\u8bb0\u672c(CentOS6.5 X86_64)\u6267\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"142\" height=\"14\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-2.png\" alt=\"\" class=\"wp-image-461\"\/><\/figure>\n\n\n\n<p>\u5e73\u53f0\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"761\" height=\"13\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-3.png\" alt=\"\" class=\"wp-image-462\"\/><\/figure>\n\n\n\n<p>2.Windows(Win7)\u6267\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"199\" height=\"14\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-4.png\" alt=\"\" class=\"wp-image-463\"\/><\/figure>\n\n\n\n<p>\u5e73\u53f0\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"636\" height=\"318\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-5.png\" alt=\"\" class=\"wp-image-464\"\/><\/figure>\n\n\n\n<p>3.Linux(Redhat6.5)\u6267\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"304\" height=\"15\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-6.png\" alt=\"\" class=\"wp-image-465\"\/><\/figure>\n\n\n\n<p>\u5e73\u53f0\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"941\" height=\"13\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-7.png\" alt=\"\" class=\"wp-image-466\"\/><\/figure>\n\n\n\n<p>4.HPUX\u6267\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"134\" height=\"14\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-8.png\" alt=\"\" class=\"wp-image-467\"\/><\/figure>\n\n\n\n<p>\u5e73\u53f0\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"450\" height=\"14\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-9.png\" alt=\"\" class=\"wp-image-468\"\/><\/figure>\n\n\n\n<p>5.MAC OS X\u6267\u884c\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"119\" height=\"17\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-10.png\" alt=\"\" class=\"wp-image-469\"\/><\/figure>\n\n\n\n<p>\u5e73\u53f0\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"562\" height=\"36\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-11.png\" alt=\"\" class=\"wp-image-470\"\/><\/figure>\n\n\n\n<p>\uff0a\u4ece\u4ee5\u4e0a\u8bbe\u5907\u4e2d\uff0c\u57fa\u4e8eX86\u5e73\u53f0\u7684\u662f\u5c0f\u7aef\u5e8f\uff0c\u57fa\u4e8eia64\u5e73\u53f0\u7684\u662f\u5927\u7aef\u5e8f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3.\u7f51\u7edc\u5b57\u8282\u5e8f<\/h2>\n\n\n\n<p>\u7f51\u7edc\u534f\u8bae\u5fc5\u987b\u6307\u5b9a\u4e00\u4e2a\u7f51\u7edc\u5b57\u8282\u5e8f\uff0c\u4f5c\u4e3a\u7f51\u7edc\u7f16\u7a0b\u4eba\u5458\u548c\u6211\u4eec\u5fc5\u9700\u6e05\u695a\u4e0d\u540c\u5b57\u8282\u5e8f\u4e4b\u95f4\u7684\u5dee\u5f02\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0c\u5728\u6bcf\u4e2aTCP\u5206\u8282\u4e2d\u90fd\u670916\u4f4d\u7684\u7aef\u53e3\u53f7\u548c32\u4f4d\u7684IPv4\u5730\u5740\u3002\u53d1\u9001\u534f\u8bae\u6808\u548c\u63a5\u6536\u534f\u8bae\u6808\u5fc5\u9700\u5c31\u8fd9\u4e9b\u591a\u5b57\u8282\u5b57\u6bb5\u5404\u4e2a\u5b57\u8282\u7684\u4f20\u9001\u987a\u5e8f\u8fbe\u6210\u4e00\u81f4\u3002\u7f51\u9645\u534f\u8bae\u4f7f\u7528\u5927\u7aef\u5b57\u8282\u5e8f\u6765\u4f20\u9001\u8fd9\u4e9b\u591a\u5b57\u8282\u6574\u6570\u3002\u00a0 \u00a0 \u00a0<\/p>\n\n\n\n<p>\uff0a\u6ce8\u610f\u8fd9\u91cc\u7684\u5b57\u8282\u5e8f\u7ea6\u5b9a\u662f\u534f\u8bae\u6808\u4e4b\u95f4\u7ea6\u5b9a\u7684\u3002\u5e94\u7528\u5c42\u4f20\u9001\u7684\u662f\u5b57\u8282\u6d41\uff0c\u4f60\u5728\u4e00\u53f0\u673a\u5668\u4e0a\u600e\u4e48\u4f20\u9001\u8fc7\u53bb\u7684\uff0c\u5728\u53e6\u4e00\u53f0\u673a\u5668\u4e0a\u5c31\u4f1a\u600e\u4e48\u63a5\u6536\u5230\u3002\u5b57\u8282\u987a\u5e8f\u4e0d\u53d8\u3002<strong>\u5728\u4e00\u822c\u5e94\u7528\u4e0b\uff0c\u6211\u4eec\u6839\u672c\u4e0d\u7528\u5173\u5fc3\u5b57\u8282\u5e8f\u7684\u95ee\u9898<\/strong>\u3002<\/p>\n\n\n\n<p>\u4e0b\u9762\u8003\u8651\u4e00\u79cd\u9700\u8981\u8003\u8651\u5b57\u8282\u5e8f\u7684\u7279\u6b8a\u60c5\u51b5\uff1a<\/p>\n\n\n\n<p>\u5047\u8bbe\u4e3b\u673aA\u662f\u5c0f\u7aef\u5e8f\uff0c\u4e3b\u673aB\u662f\u5927\u7aef\u5e8f\uff0c\u4e24\u4e2a\u5e73\u53f0\u4e0a\u6574\u6570\u90fd\u662f4\u4e2a\u5b57\u8282\u3002\u6211\u4eec\u5728\u4e3b\u673aA\u4e0a\u76f4\u63a5\u628a\u8fd9\u56db\u4e2a\u5b57\u8282\u7684\u6570\u636e\u4f20\u9001\u5230\u4e3b\u673aB\u4e0a\uff0c\u4e3b\u673aB\u628a\u8fd9\u56db\u4e2a\u5b57\u8282\u7684\u6570\u636e\u5f53\u6210\u4e00\u4e2a\u6574\u6570\u6765\u7528\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u4ec0\u4e48\u540e\u679c\uff1f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4e3b\u673aA\u4f20\u9001\u7684\u6570\u636e\uff1a00000000 00000000 00000000 00000001\n\u4e3b\u673aB\u63a5\u6536\u5230\u7684\u6570\u636e\uff1a00000000 00000000 00000000 00000001\n\u4e3b\u673aA\u628a\u8fd9\u56db\u4e2a\u5b57\u8282\u5f53\u6210\u4e00\u4e2a\u6574\u6570\uff1a\u8fd9\u4e2a\u6574\u6570\u4e3a00000000 00000000 00000000 00000001 == 1\n\u4e3b\u673aB\u628a\u8fd9\u56db\u4e2a\u5b57\u8282\u5f53\u6210\u4e00\u4e2a\u6574\u6570\uff1a\u8fd9\u4e2a\u6574\u6570\u4f4d00000001 00000000 00000000 00000000 == 2^24 = 16777216<\/code><\/pre>\n\n\n\n<p>\u6d4b\u8bd5\u7ed3\u679c\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"198\" height=\"19\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-12.png\" alt=\"\" class=\"wp-image-471\"\/><\/figure>\n\n\n\n<p>\uff0a\u5b57\u8282\u5e8f\u95ee\u9898\u901a\u5e38\u5728\u901a\u8baf\u53cc\u65b9\u4f7f\u7528\u4e8c\u8fdb\u5236\u534f\u8bae(\u4f7f\u7528\u6587\u672c\u534f\u8bae\u7684\u65f6\u5019\u65e0\u9700\u8003\u8651)\u7684\u65f6\u5019\u624d\u9700\u8981\u8003\u8651\u3002\u5982\u679c\u4e24\u53f0\u673a\u5668\u7684\u4e3b\u673a\u5e8f\u4e0d\u540c\uff0c\u90a3\u4e48\u5c31\u8981\u8003\u8651\u7edf\u4e00\u5b57\u8282\u5e8f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4.\u5b57\u8282\u5e8f\u8f6c\u6362\u51fd\u6570<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;netinet\/in.h> \nuint16_t htons(uint16_t host16bitvalue); \nuint32_t htonl(uint32_t host32bitvalue);  \/\/\u5747\u8fd4\u56de\u7f51\u7edc\u5b57\u8282\u5e8f \nuint16_t ntohs(uint16_t net16bitvalue); \nuint32_t ntohl(uint32_t net32bitvalue);   \/\/\u5747\u8fd4\u56de\u4e3b\u673a\u5b57\u8282\u5e8f\n\n#include &lt;endian.h><\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"72\" height=\"239\" src=\"http:\/\/www.wangkaixuan.tech\/wp-content\/uploads\/2020\/08\/image-13.png\" alt=\"\" class=\"wp-image-472\"\/><\/figure>\n\n\n\n<p>be = big endian<\/p>\n\n\n\n<p>le = little endian<\/p>\n\n\n\n<p>\u5176\u4e2dh\u4ee3\u8868host\uff0cn\u4ee3\u8868network\uff0cs\u4ee3\u8868short\uff0cl\u4ee3\u8868long\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1.\u5927\u7aef\u5e8f\u3001\u5c0f\u7aef\u5e8f \u8d44\u6599\u6765\u6e90\uff1a\u300aUNIX\u7f51\u7edc\u7f16\u7a0b \u53771\u300b 3.4 \u5b57\u8282\u6392\u5e8f\u51fd\u6570 \u5bf9\u4e8e\u4e00\u4e2a16\u4f4d\u7684\u6574\u6570\uff0c\u4ed6\u7531\u4e24\u4e2a\u5b57\u8282\u7ec4\u6210\u3002\u5185\u5b58\u4e2d\u5b58\u50a8\u8fd9\u4e24\u4e2a\u5b57\u8282\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u4e00\u79cd\u662f\u5c06&#8230;<\/p>\n<p class=\"read-more\"><a class=\"btn btn-default\" href=\"http:\/\/www.wangkaixuan.tech\/?p=456\"> Read More<span class=\"screen-reader-text\">  Read More<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-456","post","type-post","status-publish","format-standard","hentry","category-05-01-"],"_links":{"self":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/456","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=456"}],"version-history":[{"count":0,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/456\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=456"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}