ref: c5bd2add37725041c1924132a8a4fd67548fb975
dir: /src/hrg/cst_ffeature.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 1999-2007 */
/* All Rights Reserved. */
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/* this software and its documentation without restriction, including */
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/* 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. */
/* */
/* CARNEGIE MELLON UNIVERSITY 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 CARNEGIE MELLON UNIVERSITY 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: Alan W Black (awb@cs.cmu.edu) */
/* Date: April 2000 */
/*************************************************************************/
/* */
/* Item features and paths */
/* */
/*************************************************************************/
#include "cst_alloc.h"
#include "cst_item.h"
#include "cst_relation.h"
#include "cst_utterance.h"
#include "cst_tokenstream.h"
CST_VAL_REGISTER_FUNCPTR(ffunc,cst_ffunction)
DEF_STATIC_CONST_VAL_STRING(ffeature_default_val,"0");
static const void *internal_ff(const cst_item *item,
const char *featpath,int type);
const char *ffeature_string(const cst_item *item,const char *featpath)
{
return val_string(ffeature(item,featpath));
}
int ffeature_int(const cst_item *item,const char *featpath)
{
return val_int(ffeature(item,featpath));
}
float ffeature_float(const cst_item *item,const char *featpath)
{
return val_float(ffeature(item,featpath));
}
cst_item* path_to_item(const cst_item *item,const char *featpath)
{
return (cst_item *)internal_ff(item,featpath,1);
}
const cst_val *ffeature(const cst_item *item,const char *featpath)
{
return (cst_val *)internal_ff(item,featpath,0);
}
static const void *internal_ff(const cst_item *item,
const char *featpath,int type)
{
const char *tk, *relation;
cst_utterance *utt;
const cst_item *pitem;
void *void_v;
const cst_val *ff;
cst_ffunction ffunc;
char tokenstring[200]; /* we don't seem to have featpaths longer than 72 */
char *tokens[100];
int i,j;
/* This used to use cst_tokenstream but that was too slow */
for (i=0; i<199 && featpath[i]; i++)
tokenstring[i] = featpath[i];
tokenstring[i]='\0';
tokens[0] = tokenstring;
for (i=0,j=1; tokenstring[i]; i++)
{
if (strchr(":.",tokenstring[i]))
{
tokenstring[i] = '\0';
tokens[j] = &tokenstring[i+1];
j++;
}
}
tokens[j] = NULL;
j=0;
for (tk = tokens[j], pitem=item;
pitem &&
(((type == 0) && tokens[j+1]) ||
((type == 1) && tk));
j++, tk = tokens[j])
{
if (cst_streq(tk,"n"))
pitem = item_next(pitem);
else if (cst_streq(tk,"p"))
pitem = item_prev(pitem);
else if (cst_streq(tk,"pp"))
{
if (item_prev(pitem))
pitem = item_prev(item_prev(pitem));
else
pitem = NULL;
}
else if (cst_streq(tk,"nn"))
{
if (item_next(pitem))
pitem = item_next(item_next(pitem));
else
pitem = NULL;
}
else if (cst_streq(tk,"parent"))
pitem = item_parent(pitem);
else if ((cst_streq(tk,"daughter")) ||
(cst_streq(tk,"daughter1")))
pitem = item_daughter(pitem);
else if (cst_streq(tk,"daughtern"))
pitem = item_last_daughter(pitem);
else if (cst_streq(tk,"first"))
pitem = item_first(pitem);
else if (cst_streq(tk,"last"))
pitem = item_last(pitem);
else if (cst_streq(tk,"R"))
{
/* A relation move */
j++;
relation = tokens[j];
pitem = item_as(pitem,relation);
}
else
{
cst_errmsg("ffeature: unknown directive \"%s\" ignored\n",tk);
return NULL;
}
}
if (type == 0)
{
if (pitem && (utt = item_utt(pitem)))
ff = feat_val(utt->ffunctions,tk);
else
ff = NULL;
void_v = NULL;
if (!ff)
void_v = (void *)item_feat(pitem,tk);
else if (pitem)
{
ffunc = val_ffunc(ff);
void_v = (void *)(*ffunc)(pitem);
}
if (void_v == NULL)
{
#if 0
if (pitem)
printf("awb_debug didn't find %s in %s\n",tk,
get_param_string(pitem->contents->features,"name","noname"));
else
{
if (cst_streq("gpos",tk))
printf("awb_debug2\n");
printf("awb_debug didn't find %s %s\n",tk,featpath);
}
#endif
void_v = (void *)&ffeature_default_val;
}
}
else
void_v = (void *)pitem;
return void_v;
}
void ff_register(cst_features *ffunctions, const char *name, cst_ffunction f)
{
/* Register features functions */
#if 0
if (feat_present(ffunctions, name))
cst_errmsg("warning: ffunction %s redefined\n", name);
#endif
feat_set(ffunctions, name, ffunc_val(f));
}
void ff_unregister(cst_features *ffunctions, const char *name)
{
feat_remove(ffunctions, name);
}