{"id":791,"date":"2011-12-19T17:43:28","date_gmt":"2011-12-19T09:43:28","guid":{"rendered":"http:\/\/blog.dynox.cn\/?p=791"},"modified":"2015-06-04T10:57:47","modified_gmt":"2015-06-04T02:57:47","slug":"_snwprintf_s%e7%9a%84%e6%bd%9c%e8%a7%84%e5%88%99","status":"publish","type":"post","link":"https:\/\/blog.dynox.cn\/?p=791","title":{"rendered":"_snwprintf_s\u7684\u6f5c\u89c4\u5219"},"content":{"rendered":"<div class=\"gruber-markdown\"><p><font size=\"2\">\u5728\u7a0b\u5e8f\u4e2d\u4e3a\u4e86\u6784\u9020\u6587\u4ef6\u5168\u8def\u5f84\u65f6\uff0c\u4f7f\u7528\u4e86\u51fd\u6570_snwprintf_s\u3002\u7ed3\u679c\u5728\u91ca\u653ebuffer\u65f6\u8fd0\u884c\u65f6\u5e93(runtime library)\u62a5\u9519\uff0c\u63d0\u793abuffer\u5df2\u88ab\u7834\u574f\u4e86\u3002\u518d\u6b21\u5ba1\u89c6\u4ee3\u7801\uff0c\u770b\u4e0d\u51fa\u6709\u4ec0\u4e48\u6bdb\u75c5\uff0c\u53ea\u5f97\u52a8\u624b\u8c03\u8bd5\uff0c\u7136\u540e\u4fbf\u5b9a\u4f4d\u95ee\u9898\u51fa\u5728\u4e86_snwprintf_s\u7684\u8c03\u7528\u4e0a\u3002<\/font><\/p>  <p><font size=\"2\">_snwprintf_s\u51fd\u6570\u7684\u539f\u578b\u5b9a\u4e49\u5982\u4e0b\uff1a<\/font><\/p>  <p><em>int _snwprintf_s( wchar_t *buffer, size_t sizeOfBuffer, size_t count, const wchar_t *format [, argument] ... );<\/em> <\/p>  <p><font size=\"2\">\u5728\u7ec6\u81f4\u5730\u9605\u8bfb\u4e86<a href=\"http:\/\/msdn.microsoft.com\/en-us\/library\/f30dzcf6(v=vs.80).aspx\" target=\"_blank\">MSDN<\/a>\u4e2d\u5173\u4e8e\u5b83\u7684\u8bf4\u660e\u540e\u624d\u53d1\u73b0\u95ee\u9898\u539f\u56e0\uff1a<\/font><\/p>  <p><font size=\"2\">\u6b64\u51fd\u6570\u7b2c\u4e8c\u4e2a\u53c2\u6570(size_t sizeOfBuffer)\u662f\u4ee5word (\u53cc\u5b57\u8282)\u4e3a\u5355\u4f4d\u7684\uff0c\u800c\u4e0d\u662fbyte\u3002\u95ee\u9898\u627e\u5230\uff0c\u66f4\u6539\u4f20\u5165\u53c2\u6570\u540e\uff0cbuffer corruption\u7684\u95ee\u9898\u6d88\u5931\u3002<\/font><\/p>  <p><font size=\"2\">\u4f46\u662f\uff0c\u8fd8\u6709\u4e2a\u5947\u602a\u7684\u95ee\u9898\uff0c\u4e5f\u8bb8\u4f60\u5df2\u6ce8\u610f\u5230\uff0c\u5982\u679c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u4ee5word\u4e3a\u5355\u4f4d\u7684\uff0c\u90a3\u7b2c\u4e09\u4e2a\u53c2\u6570\u5462\uff1f\u4e0d\u5e94\u8be5\u4e5f\u662f\u4ee5word\u4e3a\u5355\u4f4d\u5417\uff1f<\/font><\/p>  <p><font size=\"2\">\u53ef\u60dc\uff0c\u4e0d\u662f\u3002\u7b2c\u4e09\u4e2a\u53c2\u6570\u4f9d\u7136\u8fd8\u662f\u4ee5byte\u4e3a\u5355\u4f4d\uff0c\u5426\u5219\u4f60\u7684\u7a0b\u5e8f\u53c8\u4e0d\u80fd\u5de5\u4f5c\u4e86\uff0c\u53ea\u662f\u8fd9\u6b21\u9519\u8bef\u5c06\u4f1a\u66f4\u52a0\u5730\u9690\u853d\u3002<\/font><\/p>  <p><font size=\"2\">\u4f60\u53ea\u80fd\u611f\u53f9\uff1a\u540c\u6837\u90fd\u662fcount\uff0c\u548b\u76f8\u5dee\u8fd9\u4e48\u5927\u5462\uff01<\/font><\/p>  <p><font size=\"2\">\u8fd9\u91cc\u518d\u8bf4\u8bf4_XXX_printf_X\u7b49\u4e00\u7cfb\u5217\u76f8\u5173\u7684\u51fd\u6570\uff0c\u5982\u679c\u4f60\u770b\u4e86MSDN\u4e2d\u5173\u4e8esnprintf\u7684\u8bf4\u660e\uff0c\u4f60\u8fd9\u5b9a\u4f1a\u60ca\u8bb6\u4e8e\u5b83\u4f17\u591a\u7684\u5144\u5f1f\u59d0\u59b9\uff0c\u4e2a\u4e2a\u76f8\u50cf\uff0c\u53ef\u7edd\u5bf9\u53c8\u5404\u4e0d\u76f8\u540c\uff1a\u5982_snprintf, _snwprintf, _snwprintf_s, _snwprintf_s_l:<\/font><\/p>  <ul>   <li><font size=\"2\">sprintf\u662fANSI C\u6240\u5b9a\u4e49\u7684\u51fd\u6570\u4e4b\u4e00\uff0c\u5e94\u8be5\u662f\u6700\u53e4\u8001\u7684\u4e00\u4e2a\uff0c\u5f53\u7136\u4e5f\u662f\u6700\u5bb9\u6613\u53d7\u7f13\u5b58\u533a\u6ea2\u51fa\u653b\u51fb\u7684\u4e00\u4e2a<\/font><\/li>    <li><font size=\"2\">_snprintf: \u591a\u4e86\u4e00\u4e2a\u201cn\u201d\u8868\u793a\u662f\u591a\u4e86\u4e00\u4e2a\u63cf\u8ff0buffer\u957f\u5ea6\u7684\u53c2\u6570\uff0c\u5982\u679c\u8f93\u5165\u5b57\u4e32\u8fc7\u957f\u5c06\u88ab\u622a\u65ad\uff0c\u6beb\u4e0d\u7559\u60c5\u3002<\/font><\/li>    <li><font size=\"2\">_snwprintf: \u591a\u4e86\u4e2a\u201cw\u201d\u8868\u793a\u662f\u5b57\u4e32\u4e3a\u53cc\u5b57\u8282\u5b57\u4e32\uff0c\u5982unicode<\/font><\/li>    <li><font size=\"2\">_snwprintf_s\uff1a\u53c8\u591a\u4e86\u4e2a\u201ds\u201d\u540e\u7f00\uff0c\u8868\u793a\u662f\u201cSecurity Enhancement\u201d\u3002\u4e3a\u4e86\u5e94\u5bf9\u7f13\u5b58\u533a\u6ea2\u51fa\u653b\u51fb\uff0c\u800c\u5bf9\u51fd\u6570\u8fdb\u884c\u6539\u8fdb\u4ee5\u5bf9\u8f93\u5165\u53c2\u6570\u8fdb\u884c\u591a\u9879\u68c0\u67e5\u3002\u66f4\u591a\u4fe1\u606f\u89c1\u4e8e\uff1a<a href=\"http:\/\/msdn.microsoft.com\/en-us\/library\/8ef0s5kh(v=vs.80).aspx\" target=\"_blank\">MSDN<\/a><\/font><\/li>    <li><font size=\"2\">_snwprintf_s_l: \u66f4\u8fdb\u4e00\u6b65\uff0c\u53c8\u591a\u4e86\u4e2a\u201cl\u201d\u540e\u8f8d\uff0c\u8868\u793a\u6b64\u51fd\u6570\u652f\u6301\u5b57\u7b26\u96c6\u6307\u5b9a\uff0c\u800c\u4e0d\u662f\u9ed8\u8ba4\u4f7f\u7528\u5f53\u524d\u5b57\u7b26\u96c6\u3002<\/font><\/li>    <li><font size=\"2\">_snwprintf_s_l_? : \u4e0d\u4e45\u7684\u5c06\u6765\u53c8\u5c06\u600e\u6837\u6f14\u5316\u5462 \uff1f\u6211\u4e14\u62ed\u76ee\u4ee5\u5f85\u3002<\/font><\/li> <\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>\u5728\u7a0b\u5e8f\u4e2d\u4e3a\u4e86\u6784\u9020\u6587\u4ef6\u5168\u8def\u5f84\u65f6\uff0c\u4f7f\u7528\u4e86\u51fd\u6570_snwprintf_s\u3002\u7ed3\u679c\u5728\u91ca\u653ebuffer\u65f6\u8fd0\u884c\u65f6\u5e93(runti [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[8,9],"tags":[557,356,355,65,357],"views":5640,"_links":{"self":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/791"}],"collection":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=791"}],"version-history":[{"count":1,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/791\/revisions"}],"predecessor-version":[{"id":1423,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=\/wp\/v2\/posts\/791\/revisions\/1423"}],"wp:attachment":[{"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.dynox.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}