{"id":26544,"date":"2022-12-18T11:23:59","date_gmt":"2022-12-18T05:53:59","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-fstream-read-behavior-upon-hitting-eof\/"},"modified":"2022-12-18T11:23:59","modified_gmt":"2022-12-18T05:53:59","slug":"solved-fstream-read-behavior-upon-hitting-eof","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-fstream-read-behavior-upon-hitting-eof\/","title":{"rendered":"[Solved] fstream read behavior upon hitting eof"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-44189521\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"44189521\" data-parentid=\"44189341\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>From the <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.cplusplus.com\/reference\/istream\/istream\/read\/\">documentation<\/a>:<\/p>\n<blockquote>\n<p>If the input sequence runs out of characters to extract (i.e., the end-of-file is reached) before <code>n<\/code> characters have been successfully read, the array pointed to by <code>s<\/code> contains all the characters read until that point, and both the <code>eofbit<\/code> and <code>failbit<\/code> flags are set for the stream.<br \/>\n  &#8230;<br \/>\n  The number of characters successfully read and stored by this function can be accessed by calling member <code>gcount<\/code>.<\/p>\n<\/blockquote>\n<p>So you can do:<\/p>\n<pre><code>while(in_file.read(buffer, buffer_length)){\n    temp = sendto(sender_socket, buffer, sizeof(buffer), 0, NULL, 0); \n    byte_count += temp;\n    msg_count ++;\n}\nstreamcount n = in_file.gcount();\nif (n &gt; 0) { \/\/ read a partial buffer\n    temp = sendto(sender_socket, buffer, n, 0, NULL, 0);\n    byte_count += temp;\n    msg_count++;\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">3<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved fstream read behavior upon hitting eof <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] From the documentation: If the input sequence runs out of characters to extract (i.e., the end-of-file is reached) before n characters have been successfully read, the array pointed to by s contains all the characters read until that point, and both the eofbit and failbit flags are set for the stream. &#8230; The number &#8230; <a title=\"[Solved] fstream read behavior upon hitting eof\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-fstream-read-behavior-upon-hitting-eof\/\" aria-label=\"More on [Solved] fstream read behavior upon hitting eof\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,513],"class_list":["post-26544","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-c11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] fstream read behavior upon hitting eof - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-fstream-read-behavior-upon-hitting-eof\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] fstream read behavior upon hitting eof - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] From the documentation: If the input sequence runs out of characters to extract (i.e., the end-of-file is reached) before n characters have been successfully read, the array pointed to by s contains all the characters read until that point, and both the eofbit and failbit flags are set for the stream. &#8230; The number ... 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