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diff --git a/www/c3ref/create_filename.html b/www/c3ref/create_filename.html new file mode 100644 index 0000000..c49f9de --- /dev/null +++ b/www/c3ref/create_filename.html @@ -0,0 +1,179 @@ +<!DOCTYPE html> +<html><head> +<meta name="viewport" content="width=device-width, initial-scale=1.0"> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<link href="../sqlite.css" rel="stylesheet"> +<title>Create and Destroy VFS Filenames</title> +<!-- path=../ --> +</head> +<body> +<div class=nosearch> +<a href="../index.html"> +<img class="logo" src="../images/sqlite370_banner.gif" alt="SQLite" border="0"> +</a> +<div><!-- IE hack to prevent disappearing logo --></div> +<div class="tagline desktoponly"> +Small. Fast. 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The result from +sqlite3_create_filename(D,J,W,N,P) is a pointer to a database filename that +is safe to pass to routines like: +<ul> +<li> <a href="../c3ref/uri_boolean.html">sqlite3_uri_parameter()</a>, +<li> <a href="../c3ref/uri_boolean.html">sqlite3_uri_boolean()</a>, +<li> <a href="../c3ref/uri_boolean.html">sqlite3_uri_int64()</a>, +<li> <a href="../c3ref/uri_boolean.html">sqlite3_uri_key()</a>, +<li> <a href="../c3ref/filename_database.html">sqlite3_filename_database()</a>, +<li> <a href="../c3ref/filename_database.html">sqlite3_filename_journal()</a>, or +<li> <a href="../c3ref/filename_database.html">sqlite3_filename_wal()</a>. +</ul> +If a memory allocation error occurs, sqlite3_create_filename() might +return a NULL pointer. The memory obtained from sqlite3_create_filename(X) +must be released by a corresponding call to sqlite3_free_filename(Y).</p> + +<p>The P parameter in sqlite3_create_filename(D,J,W,N,P) should be an array +of 2*N pointers to strings. Each pair of pointers in this array corresponds +to a key and value for a query parameter. The P parameter may be a NULL +pointer if N is zero. None of the 2*N pointers in the P array may be +NULL pointers and key pointers should not be empty strings. +None of the D, J, or W parameters to sqlite3_create_filename(D,J,W,N,P) may +be NULL pointers, though they can be empty strings.</p> + +<p>The sqlite3_free_filename(Y) routine releases a memory allocation +previously obtained from sqlite3_create_filename(). Invoking +sqlite3_free_filename(Y) where Y is a NULL pointer is a harmless no-op.</p> + +<p>If the Y parameter to sqlite3_free_filename(Y) is anything other +than a NULL pointer or a pointer previously acquired from +sqlite3_create_filename(), then bad things such as heap +corruption or segfaults may occur. The value Y should not be +used again after sqlite3_free_filename(Y) has been called. This means +that if the <a href="../c3ref/vfs.html#sqlite3vfsxopen">sqlite3_vfs.xOpen()</a> method of a VFS has been called using Y, +then the corresponding [sqlite3_module.xClose() method should also be +invoked prior to calling sqlite3_free_filename(Y). +</p><p>See also lists of + <a href="../c3ref/objlist.html">Objects</a>, + <a href="../c3ref/constlist.html">Constants</a>, and + <a href="../c3ref/funclist.html">Functions</a>.</p> + |