ref: c5bd2add37725041c1924132a8a4fd67548fb975
dir: /src/utils/cst_features.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 1999 */
/* 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. */
/* */
/* 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 */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: December 1999 */
/*************************************************************************/
/* */
/* Feature support */
/* */
/*************************************************************************/
#include "cst_error.h"
#include "cst_features.h"
CST_VAL_REGISTER_TYPE(features,cst_features)
static cst_featvalpair *feat_find_featpair(const cst_features *f,
const char *name)
{
cst_featvalpair *n;
if (f == NULL)
return NULL;
else
{
for (n=f->head; n; n=n->next)
if (cst_streq(name,n->name))
return n;
return NULL;
}
}
cst_features *new_features(void)
{
cst_features *f;
f = cst_alloc(cst_features,1);
f->head = NULL;
f->ctx = NULL;
return f;
}
cst_features *new_features_local(cst_alloc_context ctx)
{
cst_features *f;
f = (cst_features *)cst_local_alloc(ctx, sizeof(*f));
f->head = NULL;
f->ctx = ctx;
return f;
}
void delete_features(cst_features *f)
{
cst_featvalpair *n, *np;
if (f)
{
for (n=f->head; n; n=np)
{
np = n->next;
delete_val(n->val);
cst_local_free(f->ctx,n);
}
delete_val(f->owned_strings);
cst_local_free(f->ctx,f);
}
}
int feat_present(const cst_features *f, const char *name)
{
if (feat_find_featpair(f,name) != NULL)
return 1;
else if (f && f->linked)
return feat_present(f->linked,name);
else
return 0;
}
int feat_length(const cst_features *f)
{
int i=0;
cst_featvalpair *p;
if (f)
for (i=0,p=f->head; p; p=p->next)
i++;
return i;
}
int feat_remove(cst_features *f, const char *name)
{
cst_featvalpair *n,*p,*np;
if (f == NULL)
return FALSE; /* didn't remove it */
else
{
for (p=NULL,n=f->head; n; p=n,n=np)
{
np = n->next;
if (cst_streq(name,n->name))
{
if (p == 0)
f->head = np;
else
p->next = np;
delete_val(n->val);
cst_local_free(f->ctx,n);
return TRUE;
}
}
return FALSE;
}
}
int feat_int(const cst_features *f, const char *name)
{
return val_int(feat_val(f,name));
}
float feat_float(const cst_features *f, const char *name)
{
return val_float(feat_val(f,name));
}
const char *feat_string(const cst_features *f, const char *name)
{
return val_string(feat_val(f,name));
}
const cst_val *feat_val(const cst_features *f, const char *name)
{
cst_featvalpair *n;
n = feat_find_featpair(f,name);
if (n == NULL)
{
if (f && f->linked)
{ /* Search the linked features too if there are any */
/* We assume the linked features haven't been deleted, and */
return feat_val(f->linked,name);
}
else
return NULL; /* its really not there at all */
}
else
return n->val;
}
int get_param_int(const cst_features *f, const char *name,int def)
{
const cst_val *v;
v = feat_val(f,name);
if (v != NULL)
return val_int(v);
else
return def;
}
float get_param_float(const cst_features *f, const char *name, float def)
{
const cst_val *v;
v = feat_val(f,name);
if (v != NULL)
return val_float(v);
else
return def;
}
const char *get_param_string(const cst_features *f, const char *name, const char *def)
{
const cst_val *v;
v = feat_val(f,name);
if (v != NULL)
return val_string(v);
else
return def;
}
const cst_val *get_param_val(const cst_features *f, const char *name, cst_val *def)
{
const cst_val *v;
v = feat_val(f,name);
if (v != NULL)
return v;
else
return def;
}
void feat_set_int(cst_features *f, const char *name, int v)
{
feat_set(f,name,int_val(v));
}
void feat_set_float(cst_features *f, const char *name, float v)
{
feat_set(f,name,float_val(v));
}
void feat_set_string(cst_features *f, const char *name, const char *v)
{
feat_set(f,name,string_val(v));
}
void feat_set(cst_features *f, const char* name, const cst_val *val)
{
cst_featvalpair *n;
n = feat_find_featpair(f,name);
if (val == NULL)
{
cst_errmsg("cst_features: trying to set a NULL val for feature \"%s\"\n",
name);
}
else if (n == NULL)
{ /* first reference to this feature so create new fpair */
cst_featvalpair *p;
p = (cst_featvalpair *)cst_local_alloc(f->ctx, sizeof(*p));
p->next = f->head;
p->name = name;
p->val = val_inc_refcount(val);
f->head = p;
}
else
{
delete_val(n->val);
n->val = val_inc_refcount(val);
}
}
int feat_copy_into(const cst_features *from,cst_features *to)
{
/* Copy all features in from into to */
cst_featvalpair *p;
int i;
for (i=0,p=from->head; p; p=p->next,i++)
feat_set(to,p->name,p->val);
return i;
}
int feat_link_into(const cst_features *from,cst_features *to)
{
/* Thus allows more global features to be linked, without a copy */
/* This is used to make things thread safe(r) */
to->linked = from;
return 1;
}
const char *feat_own_string(cst_features *f,const char *n)
{
f->owned_strings = cons_val(string_val(n),f->owned_strings);
return val_string(val_car(f->owned_strings));
}
int cst_feat_print(cst_file fd,const cst_features *f)
{
cst_featvalpair *p;
for (p=f->head; p; p=p->next)
{
cst_fprintf(fd, "%s ",p->name);
val_print(fd,p->val);
cst_fprintf(fd,"\n");
}
return 0;
}