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EST_FeatureFunctionContext.cc
/************************************************************************/
/* */
/* Centre for Speech Technology Research */
/* University of Edinburgh, UK */
/* Copyright (c) 1996,1997 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* THE UNIVERSITY OF EDINBURGH AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL THE UNIVERSITY OF EDINBURGH NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
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/* */
/*************************************************************************/
/* */
/* Author: Richard Caley (rjc@cstr.ed.ac.uk) */
/* -------------------------------------------------------------------- */
/* A complete lookup table for feature functions. */
/* */
/*************************************************************************/
#include "ling_class/EST_Item.h"
#include "ling_class/EST_FeatureFunctionPackage.h"
#include "EST_FeatureFunctionContext.h"
#include "ling_class_init.h"
void EST_FeatureFunctionContext::class_init(void)
{
ling_class_init::use();
global = new EST_FeatureFunctionContext();
}
EST_FeatureFunctionContext *EST_FeatureFunctionContext::global;
const EST_String EST_FeatureFunctionContext::separator = "+";
EST_FeatureFunctionContext::EST_FeatureFunctionContext(void)
: cache(100)
{
}
EST_FeatureFunctionContext::~EST_FeatureFunctionContext(void)
{
EST_TList<EST_FeatureFunctionPackage *>::RwEntries p;
for(p.begin(packages); p; ++p)
{
// Only the global list owns it's packages.
if (this == global)
delete *p;
*p = NULL;
}
}
EST_FeatureFunctionPackage *EST_FeatureFunctionContext::get_package(const EST_String name) const
{
EST_TList<EST_FeatureFunctionPackage *>::Entries p;
for(p.begin(packages); p; ++p)
{
EST_FeatureFunctionPackage *package = *p;
if (package->name() == name)
return package;
}
return NULL;
}
EST_String EST_FeatureFunctionContext::get_featfunc_name(const EST_Item_featfunc func, int &found) const
{
EST_TList<EST_FeatureFunctionPackage *>::Entries p;
found=0;
for(p.begin(packages); p; ++p)
{
EST_FeatureFunctionPackage *package = *p;
EST_String name = package->lookup(func, found);
if (found)
{
return EST_String::cat(package->name(), separator, name);
}
}
found=0;
return "";
}
void EST_FeatureFunctionContext::clear_cache(void)
{
cache.clear();
}
void EST_FeatureFunctionContext::add_package(const EST_String name)
{
if (this == global)
EST_error("Attempt to add package '%s' to global list",
(const char *)name
);
EST_FeatureFunctionPackage *package = global->get_package(name);
if (package == NULL)
EST_error("package '%s' not loaded",
(const char *)name
);
packages.prepend(package);
clear_cache();
}
void EST_FeatureFunctionContext::add_package(EST_FeatureFunctionPackage *package)
{
packages.prepend(package);
clear_cache();
}
bool EST_FeatureFunctionContext::package_included(const EST_String name) const
{
return get_package(name) != NULL;
}
const EST_Item_featfunc EST_FeatureFunctionContext::get_featfunc(const EST_String name,
int must)
{
int pos, len;
if (cache.present(name))
return cache.val(name);
if ((pos= name.search(separator, len, 0))>=0)
{
const EST_Item_featfunc func2 =
get_featfunc(name.before(pos,separator.length()),
name.after(pos,separator.length()), must);
if (func2 != NULL)
cache.add_item(name, func2);
return func2;
}
// No package name so look up directly.
EST_TList<EST_FeatureFunctionPackage *>::Entries p;
for(p.begin(packages); p; ++p)
{
EST_FeatureFunctionPackage *package = *p;
int found;
const EST_FeatureFunctionPackage::Entry &ent = package->lookup(name, found);
if (found)
{
cache.add_item(name, ent.func);
return ent.func;
}
}
if (must)
EST_error("No feature function '%s'", (const char *)name);
return NULL;
}
const EST_Item_featfunc EST_FeatureFunctionContext::get_featfunc(const EST_String pname,
const EST_String name,
int must)
{
EST_FeatureFunctionPackage *package = get_package(pname);
int found;
const EST_FeatureFunctionPackage::Entry &ent =
package->lookup(name, found);
if (found)
return ent.func;
if (must)
EST_error("No feature function '%s'", (const char *)name);
return NULL;
}
static EST_Val Dummy_Func(EST_Item *) { return EST_Val(); }
template <> EST_String
EST_THash<EST_String, EST_Item_featfunc>::Dummy_Key = "DUMMY";
template <> EST_Item_featfunc
EST_THash<EST_String, EST_Item_featfunc>::Dummy_Value = Dummy_Func;
Declare_TList_T(EST_FeatureFunctionPackage *, EST_FeatureFunctionPackageP)
#if defined(INSTANTIATE_TEMPLATES)
#include "../base_class/EST_THash.cc"
Instantiate_TStringHash(EST_Item_featfunc)
#include "../base_class/EST_TList.cc"
Instantiate_TList_T(EST_FeatureFunctionPackage *, EST_FeatureFunctionPackageP)
#endif
EST_FeatureFunctionContext
Definition EST_FeatureFunctionContext.h:49
EST_FeatureFunctionPackage
Definition EST_FeatureFunctionPackage.h:48
EST_String
Definition EST_String.h:70
EST_String::before
EST_String before(int pos, int len=0) const
Part before position.
Definition EST_String.h:286
EST_String::cat
static EST_String cat(const EST_String s1, const EST_String s2=Empty, const EST_String s3=Empty, const EST_String s4=Empty, const EST_String s5=Empty, const EST_String s6=Empty, const EST_String s7=Empty, const EST_String s8=Empty, const EST_String s9=Empty)
Definition EST_String.cc:1096
EST_String::search
int search(const char *s, int len, int &mlen, int pos=0) const
Find a substring.
Definition EST_String.h:334
EST_String::after
EST_String after(int pos, int len=1) const
Part after pos+len.
Definition EST_String.h:318
EST_TIterator::begin
void begin(const Container &over)
Set the iterator ready to run over this container.
Definition EST_TIterator.h:115
EST_TRwIterator::begin
void begin(Container &over)
Set the iterator ready to run over this container.
Definition EST_TIterator.h:245