121 lines
4.3 KiB
HTML
121 lines
4.3 KiB
HTML
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<!DOCTYPE html>
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<html><head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="../sqlite.css" rel="stylesheet">
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<title>A Handle To An Open BLOB</title>
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<!-- path=../ -->
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</head>
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<body>
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<div class=nosearch>
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<a href="../index.html">
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<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0">
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</a>
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<div><!-- IE hack to prevent disappearing logo --></div>
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<div class="tagline desktoponly">
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Small. Fast. Reliable.<br>Choose any three.
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</div>
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<div class="menu mainmenu">
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<ul>
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<li><a href="../index.html">Home</a>
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<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
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<li class='wideonly'><a href='../about.html'>About</a>
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<li class='desktoponly'><a href="../docs.html">Documentation</a>
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<li class='desktoponly'><a href="../download.html">Download</a>
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<li class='wideonly'><a href='../copyright.html'>License</a>
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<li class='desktoponly'><a href="../support.html">Support</a>
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<li class='desktoponly'><a href="../prosupport.html">Purchase</a>
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<li class='search' id='search_menubutton'>
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<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
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</ul>
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</div>
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<div class="menu submenu" id="submenu">
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<ul>
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<li><a href='../about.html'>About</a>
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<li><a href='../docs.html'>Documentation</a>
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<li><a href='../download.html'>Download</a>
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<li><a href='../support.html'>Support</a>
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<li><a href='../prosupport.html'>Purchase</a>
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</ul>
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</div>
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<div class="searchmenu" id="searchmenu">
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<form method="GET" action="../search">
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<select name="s" id="searchtype">
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<option value="d">Search Documentation</option>
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<option value="c">Search Changelog</option>
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</select>
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<input type="text" name="q" id="searchbox" value="">
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<input type="submit" value="Go">
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</form>
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</div>
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</div>
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<script>
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function toggle_div(nm) {
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var w = document.getElementById(nm);
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if( w.style.display=="block" ){
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w.style.display = "none";
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}else{
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w.style.display = "block";
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}
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}
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function toggle_search() {
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var w = document.getElementById("searchmenu");
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if( w.style.display=="block" ){
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w.style.display = "none";
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} else {
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w.style.display = "block";
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setTimeout(function(){
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document.getElementById("searchbox").focus()
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}, 30);
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}
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}
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function div_off(nm){document.getElementById(nm).style.display="none";}
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window.onbeforeunload = function(e){div_off("submenu");}
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/* Disable the Search feature if we are not operating from CGI, since */
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/* Search is accomplished using CGI and will not work without it. */
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if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
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document.getElementById("search_menubutton").style.display = "none";
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}
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/* Used by the Hide/Show button beside syntax diagrams, to toggle the */
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function hideorshow(btn,obj){
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var x = document.getElementById(obj);
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var b = document.getElementById(btn);
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if( x.style.display!='none' ){
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x.style.display = 'none';
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b.innerHTML='show';
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}else{
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x.style.display = '';
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b.innerHTML='hide';
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}
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return false;
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}
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</script>
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</div>
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<!-- keywords: {BLOB handle} {BLOB handles} sqlite3_blob -->
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<div class=nosearch>
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<a href="intro.html"><h2>SQLite C Interface</h2></a>
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<h2>A Handle To An Open BLOB</h2>
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</div>
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<blockquote><pre>
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typedef struct sqlite3_blob sqlite3_blob;
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</pre></blockquote>
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<p>
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An instance of this object represents an open BLOB on which
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<a href="../c3ref/blob_open.html">incremental BLOB I/O</a> can be performed.
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Objects of this type are created by <a href="../c3ref/blob_open.html">sqlite3_blob_open()</a>
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and destroyed by <a href="../c3ref/blob_close.html">sqlite3_blob_close()</a>.
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The <a href="../c3ref/blob_read.html">sqlite3_blob_read()</a> and <a href="../c3ref/blob_write.html">sqlite3_blob_write()</a> interfaces
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can be used to read or write small subsections of the BLOB.
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The <a href="../c3ref/blob_bytes.html">sqlite3_blob_bytes()</a> interface returns the size of the BLOB in bytes.
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</p><p>Constructor: <a href="../c3ref/blob_open.html">sqlite3_blob_open()</a></p>
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<p>Destructor: <a href="../c3ref/blob_close.html">sqlite3_blob_close()</a></p>
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<p>Methods:
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<a href="../c3ref/blob_bytes.html">sqlite3_blob_bytes()</a>,
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<a href="../c3ref/blob_read.html">sqlite3_blob_read()</a>,
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<a href="../c3ref/blob_reopen.html">sqlite3_blob_reopen()</a>,
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<a href="../c3ref/blob_write.html">sqlite3_blob_write()</a></p>
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<p>See also lists of
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<a href="objlist.html">Objects</a>,
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<a href="constlist.html">Constants</a>, and
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<a href="funclist.html">Functions</a>.</p>
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