vector.h
/* ====================================================================
* Copyright (c) 1999-2004 Carnegie Mellon University. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* This work was supported in part by funding from the Defense Advanced
* Research Projects Agency and the National Science Foundation of the
* United States of America, and the CMU Sphinx Speech Consortium.
*
* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
* NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ====================================================================
*
*/
/*
* vector.h -- vector routines.
*
* **********************************************
* CMU ARPA Speech Project
*
* Copyright (c) 1997 Carnegie Mellon University.
* ALL RIGHTS RESERVED.
* **********************************************
*/
#ifndef __VECTOR_H__
#define __VECTOR_H__
/* System headers. */
#include <stdio.h>
/* SphinxBase headers. */
#include <sphinxbase/prim_type.h>
typedef float32 *vector_t;
/*
* The reason for some of the "trivial" routines below is that they could be OPTIMIZED for SPEED
* at some point.
*/
/* Floor all elements of v[0..dim-1] to min value of f */
void vector_floor(vector_t v, int32 dim, float64 f);
/* Floor all non-0 elements of v[0..dim-1] to min value of f */
void vector_nz_floor(vector_t v, int32 dim, float64 f);
/*
* Normalize the elements of the given vector so that they sum to 1.0. If the sum is 0.0
* to begin with, the vector is left untouched. Return value: The normalization factor.
*/
float64 vector_sum_norm(vector_t v, int32 dim);
/* Print vector in one line, in %11.4e format, terminated by newline */
void vector_print(FILE *fp, vector_t v, int32 dim);
/* Return TRUE iff given vector is all 0.0 */
int32 vector_is_zero (float32 *vec, /* In: Vector to be checked */
int32 len); /* In: Length of above vector */
#endif /* VECTOR_H */