Mercurial > projects > ldc
diff tango/tango/io/stream/TypedStream.d @ 132:1700239cab2e trunk
[svn r136] MAJOR UNSTABLE UPDATE!!!
Initial commit after moving to Tango instead of Phobos.
Lots of bugfixes...
This build is not suitable for most things.
author | lindquist |
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date | Fri, 11 Jan 2008 17:57:40 +0100 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tango/tango/io/stream/TypedStream.d Fri Jan 11 17:57:40 2008 +0100 @@ -0,0 +1,162 @@ +/******************************************************************************* + + copyright: Copyright (c) 2007 Kris Bell. All rights reserved + + license: BSD style: $(LICENSE) + + version: Initial release: Nov 2007 + + author: Kris + + Streams to expose simple native types as discrete elements. I/O + is buffered and should yield fair performance. + +*******************************************************************************/ + +module tango.io.stream.TypedStream; + +private import tango.io.Buffer, + tango.io.Conduit; + +/******************************************************************************* + + Type T is the target or destination type + +*******************************************************************************/ + +class TypedInput(T) : InputFilter, Buffered +{ + private IBuffer input; + + /*********************************************************************** + + ***********************************************************************/ + + this (InputStream stream) + { + super (input = Buffer.share (stream)); + } + + /*********************************************************************** + + Buffered interface + + ***********************************************************************/ + + final IBuffer buffer () + { + return input; + } + + /*********************************************************************** + + Override this to give back a useful chaining reference + + ***********************************************************************/ + + final override TypedInput clear () + { + host.clear; + return this; + } + + /*********************************************************************** + + Read a value from the stream. Returns false when all + content has been consumed + + ***********************************************************************/ + + final bool read (inout T x) + { + return input.read((&x)[0..1]) is T.sizeof; + } + + /*********************************************************************** + + Iterate over all content + + ***********************************************************************/ + + final int opApply (int delegate(ref T x) dg) + { + T x; + int ret; + + while ((input.read((&x)[0..1]) is T.sizeof)) + if ((ret = dg (x)) != 0) + break; + return ret; + } +} + + + +/******************************************************************************* + + Type T is the target or destination type. + +*******************************************************************************/ + +class TypedOutput (T) : OutputFilter, Buffered +{ + private IBuffer output; + + /*********************************************************************** + + ***********************************************************************/ + + this (OutputStream stream) + { + super (output = Buffer.share (stream)); + } + + /*********************************************************************** + + Buffered interface + + ***********************************************************************/ + + final IBuffer buffer () + { + return output; + } + + /*********************************************************************** + + Append a value to the output stream + + ***********************************************************************/ + + final void write (T x) + { + output.append (&x, T.sizeof); + } +} + + +/******************************************************************************* + +*******************************************************************************/ + +debug (UnitTest) +{ + import tango.io.Stdout; + import tango.io.stream.UtfStream; + + unittest + { + auto inp = new TypedInput!(char)(new Buffer("hello world")); + auto oot = new TypedOutput!(char)(new Buffer(20)); + + foreach (x; inp) + oot.write (x); + assert (oot.buffer.slice == "hello world"); + + auto xx = new TypedInput!(char)(new UtfInput!(char, dchar)(new Buffer("hello world"d))); + char[] yy; + foreach (x; xx) + yy ~= x; + assert (yy == "hello world"); + } +}