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src
shogun
classifier
vw
cache
VwCacheReader.h
浏览该文件的文档.
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/*
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* Copyright (c) 2009 Yahoo! Inc. All rights reserved. The copyrights
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* embodied in the content of this file are licensed under the BSD
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* (revised) open source license.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* Written (W) 2011 Shashwat Lal Das
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* Adaptation of Vowpal Wabbit v5.1.
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* Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society.
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*/
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#ifndef _VW_CACHEREAD_H__
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#define _VW_CACHEREAD_H__
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#include <
shogun/base/SGObject.h
>
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#include <
shogun/lib/common.h
>
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#include <
shogun/io/IOBuffer.h
>
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#include <
shogun/classifier/vw/vw_common.h
>
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namespace
shogun
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{
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enum
EVwCacheType
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{
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C_NATIVE
= 0,
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C_PROTOBUF
= 1
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};
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class
CVwCacheReader
:
public
CSGObject
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{
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public
:
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CVwCacheReader
();
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CVwCacheReader
(
char
* fname,
CVwEnvironment
* env_to_use);
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CVwCacheReader
(int32_t f,
CVwEnvironment
* env_to_use);
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virtual
~CVwCacheReader
();
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virtual
void
set_file
(int32_t f);
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virtual
void
set_env
(
CVwEnvironment
* env_to_use);
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virtual
CVwEnvironment
*
get_env
();
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virtual
void
set_mm
(
float64_t
label)
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{
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env
->
min_label
=
CMath::min
(
env
->
min_label
, label);
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if
(label != FLT_MAX)
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env
->
max_label
=
CMath::max
(
env
->
max_label
, label);
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}
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virtual
void
noop_mm
(
float64_t
label) { }
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virtual
void
set_minmax
(
float64_t
label)
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{
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set_mm
(label);
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}
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virtual
bool
read_cached_example
(
VwExample
*
const
ae) = 0;
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virtual
const
char
*
get_name
()
const
{
return
"VwCacheReader"
; }
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protected
:
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int32_t
fd
;
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CVwEnvironment
*
env
;
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};
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}
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#endif // _VW_CACHEREAD_H__
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