<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <link rel="stylesheet" href="style.css" type="text/css"> <meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type"> <link rel="Start" href="index.html"> <link rel="Up" href="Scanf.html"> <link title="Index of types" rel=Appendix href="index_types.html"> <link title="Index of exceptions" rel=Appendix href="index_exceptions.html"> <link title="Index of values" rel=Appendix href="index_values.html"> <link title="Index of modules" rel=Appendix href="index_modules.html"> <link title="Index of module types" rel=Appendix href="index_module_types.html"> <link title="Arg" rel="Chapter" href="Arg.html"> <link title="Arith_status" rel="Chapter" href="Arith_status.html"> <link title="Array" rel="Chapter" href="Array.html"> <link title="ArrayLabels" rel="Chapter" href="ArrayLabels.html"> <link title="Big_int" rel="Chapter" href="Big_int.html"> <link title="Bigarray" rel="Chapter" href="Bigarray.html"> <link title="Buffer" rel="Chapter" href="Buffer.html"> <link title="Callback" rel="Chapter" href="Callback.html"> <link title="CamlinternalLazy" rel="Chapter" href="CamlinternalLazy.html"> <link title="CamlinternalMod" rel="Chapter" href="CamlinternalMod.html"> <link title="CamlinternalOO" rel="Chapter" href="CamlinternalOO.html"> <link title="Char" rel="Chapter" href="Char.html"> <link title="Complex" rel="Chapter" href="Complex.html"> <link title="Condition" rel="Chapter" href="Condition.html"> <link title="Dbm" rel="Chapter" href="Dbm.html"> <link title="Digest" rel="Chapter" href="Digest.html"> <link title="Dynlink" rel="Chapter" href="Dynlink.html"> <link title="Event" rel="Chapter" href="Event.html"> <link title="Filename" rel="Chapter" href="Filename.html"> <link title="Format" rel="Chapter" href="Format.html"> <link title="Gc" rel="Chapter" href="Gc.html"> <link title="Genlex" rel="Chapter" href="Genlex.html"> <link title="Graphics" rel="Chapter" href="Graphics.html"> <link title="GraphicsX11" rel="Chapter" href="GraphicsX11.html"> <link title="Hashtbl" rel="Chapter" href="Hashtbl.html"> <link title="Int32" rel="Chapter" href="Int32.html"> <link title="Int64" rel="Chapter" href="Int64.html"> <link title="Lazy" rel="Chapter" href="Lazy.html"> <link title="Lexing" rel="Chapter" href="Lexing.html"> <link title="List" rel="Chapter" href="List.html"> <link title="ListLabels" rel="Chapter" href="ListLabels.html"> <link title="Map" rel="Chapter" href="Map.html"> <link title="Marshal" rel="Chapter" href="Marshal.html"> <link title="MoreLabels" rel="Chapter" href="MoreLabels.html"> <link title="Mutex" rel="Chapter" href="Mutex.html"> <link title="Nativeint" rel="Chapter" href="Nativeint.html"> <link title="Num" rel="Chapter" href="Num.html"> <link title="Obj" rel="Chapter" href="Obj.html"> <link title="Oo" rel="Chapter" href="Oo.html"> <link title="Parsing" rel="Chapter" href="Parsing.html"> <link title="Pervasives" rel="Chapter" href="Pervasives.html"> <link title="Printexc" rel="Chapter" href="Printexc.html"> <link title="Printf" rel="Chapter" href="Printf.html"> <link title="Queue" rel="Chapter" href="Queue.html"> <link title="Random" rel="Chapter" href="Random.html"> <link title="Scanf" rel="Chapter" href="Scanf.html"> <link title="Set" rel="Chapter" href="Set.html"> <link title="Sort" rel="Chapter" href="Sort.html"> <link title="Stack" rel="Chapter" href="Stack.html"> <link title="StdLabels" rel="Chapter" href="StdLabels.html"> <link title="Str" rel="Chapter" href="Str.html"> <link title="Stream" rel="Chapter" href="Stream.html"> <link title="String" rel="Chapter" href="String.html"> <link title="StringLabels" rel="Chapter" href="StringLabels.html"> <link title="Sys" rel="Chapter" href="Sys.html"> <link title="Thread" rel="Chapter" href="Thread.html"> <link title="ThreadUnix" rel="Chapter" href="ThreadUnix.html"> <link title="Tk" rel="Chapter" href="Tk.html"> <link title="Unix" rel="Chapter" href="Unix.html"> <link title="UnixLabels" rel="Chapter" href="UnixLabels.html"> <link title="Weak" rel="Chapter" href="Weak.html"><title>Scanf.Scanning</title> </head> <body> <div class="navbar"> <a href="Scanf.html">Up</a> </div> <center><h1>Module <a href="type_Scanf.Scanning.html">Scanf.Scanning</a></h1></center> <br> <pre><span class="keyword">module</span> Scanning: <code class="code"><span class="keyword">sig</span></code> <a href="Scanf.Scanning.html">..</a> <code class="code"><span class="keyword">end</span></code></pre><a name="6_Scanningbuffers"></a> <h6>Scanning buffers</h6><br> <hr width="100%"> <pre><span class="keyword">type</span> <a name="TYPEscanbuf"></a><code class="type"></code>scanbuf </pre> <div class="info"> The type of scanning buffers. A scanning buffer is the source from which a formatted input function gets characters. The scanning buffer holds the current state of the scan, plus a function to get the next char from the input, and a token buffer to store the string matched so far. <p> Note: a scan may often require to examine one character in advance; when this ``lookahead'' character does not belong to the token read, it is stored back in the scanning buffer and becomes the next character read.<br> </div> <pre><span class="keyword">val</span> <a name="VALstdib"></a>stdib : <code class="type"><a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a></code></pre><div class="info"> The scanning buffer reading from <code class="code">stdin</code>. <code class="code">stdib</code> is equivalent to <code class="code"><span class="constructor">Scanning</span>.from_channel stdin</code>. <p> Note: when input is read interactively from <code class="code">stdin</code>, the newline character that triggers the evaluation is incorporated in the input; thus, scanning specifications must properly skip this character (simply add a <code class="code"><span class="string">'\n'</span></code> as the last character of the format string).<br> </div> <pre><span class="keyword">val</span> <a name="VALfrom_string"></a>from_string : <code class="type">string -> <a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a></code></pre><div class="info"> <code class="code"><span class="constructor">Scanning</span>.from_string s</code> returns a scanning buffer which reads from the given string. Reading starts from the first character in the string. The end-of-input condition is set when the end of the string is reached.<br> </div> <pre><span class="keyword">val</span> <a name="VALfrom_file"></a>from_file : <code class="type">string -> <a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a></code></pre><div class="info"> Bufferized file reading in text mode. The efficient and usual way to scan text mode files (in effect, <code class="code">from_file</code> returns a scanning buffer that reads characters in large chunks, rather than one character at a time as buffers returned by <code class="code">from_channel</code> do). <code class="code"><span class="constructor">Scanning</span>.from_file fname</code> returns a scanning buffer which reads from the given file <code class="code">fname</code> in text mode.<br> </div> <pre><span class="keyword">val</span> <a name="VALfrom_file_bin"></a>from_file_bin : <code class="type">string -> <a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a></code></pre><div class="info"> Bufferized file reading in binary mode.<br> </div> <pre><span class="keyword">val</span> <a name="VALfrom_function"></a>from_function : <code class="type">(unit -> char) -> <a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a></code></pre><div class="info"> <code class="code"><span class="constructor">Scanning</span>.from_function f</code> returns a scanning buffer with the given function as its reading method. <p> When scanning needs one more character, the given function is called. <p> When the function has no more character to provide, it must signal an end-of-input condition by raising the exception <code class="code"><span class="constructor">End_of_file</span></code>.<br> </div> <pre><span class="keyword">val</span> <a name="VALfrom_channel"></a>from_channel : <code class="type"><a href="Pervasives.html#TYPEin_channel">in_channel</a> -> <a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a></code></pre><div class="info"> <code class="code"><span class="constructor">Scanning</span>.from_channel ic</code> returns a scanning buffer which reads from the input channel <code class="code">ic</code>, starting at the current reading position.<br> </div> <pre><span class="keyword">val</span> <a name="VALend_of_input"></a>end_of_input : <code class="type"><a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a> -> bool</code></pre><div class="info"> <code class="code"><span class="constructor">Scanning</span>.end_of_input ib</code> tests the end-of-input condition of the given scanning buffer.<br> </div> <pre><span class="keyword">val</span> <a name="VALbeginning_of_input"></a>beginning_of_input : <code class="type"><a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a> -> bool</code></pre><div class="info"> <code class="code"><span class="constructor">Scanning</span>.beginning_of_input ib</code> tests the beginning of input condition of the given scanning buffer.<br> </div> <pre><span class="keyword">val</span> <a name="VALname_of_input"></a>name_of_input : <code class="type"><a href="Scanf.Scanning.html#TYPEscanbuf">scanbuf</a> -> string</code></pre><div class="info"> <code class="code"><span class="constructor">Scanning</span>.file_name_of_input ib</code> returns the name of the character source for the scanning buffer <code class="code">ib</code>.<br> </div> </body></html>