test_float.c
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上传日期:2022-01-05
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- /*
- ** Copyright (C) 2006-2009 Erik de Castro Lopo <erikd@mega-nerd.com>
- **
- ** This program is free software; you can redistribute it and/or modify
- ** it under the terms of the GNU Lesser General Public License as published by
- ** the Free Software Foundation; either version 2.1 of the License, or
- ** (at your option) any later version.
- **
- ** This program is distributed in the hope that it will be useful,
- ** but WITHOUT ANY WARRANTY; without even the implied warranty of
- ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ** GNU Lesser General Public License for more details.
- **
- ** You should have received a copy of the GNU Lesser General Public License
- ** along with this program; if not, write to the Free Software
- ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
- #include "sfconfig.h"
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <stdarg.h>
- #include <errno.h>
- #include <math.h>
- #include "common.h"
- #include "test_main.h"
- void
- test_float_convert (void)
- { static float data [] =
- { 0.0, 1.0, -1.0, 1.0 * M_PI, -1.0 * M_PI,
- 1e9, -1e9, 1e-9, -1e-9, 1e-10, -1e-10,
- 1e-19, -1e-19, 1e19, -1e19, 1e-20, -1e-20,
- } ;
- int k ;
- print_test_name (__func__) ;
- for (k = 0 ; k < ARRAY_LEN (data) ; k++)
- { unsigned char bytes [4] ;
- float test ;
- float32_le_write (data [k], bytes) ;
- test = float32_le_read (bytes) ;
- if (fabs (data [k] - test) > 1e-20)
- { printf ("nnLine %d : Test %d, little endian error %.15g -> %.15g.nn", __LINE__, k, data [k], test ) ;
- exit (1) ;
- } ;
- float32_be_write (data [k], bytes) ;
- test = float32_be_read (bytes) ;
- if (fabs (data [k] - test) > 1e-20)
- { printf ("nnLine %d : Test %d, big endian error %.15g -> %.15g.nn", __LINE__, k, data [k], test) ;
- exit (1) ;
- } ;
- } ;
- puts ("ok") ;
- } /* test_float_convert */
- void
- test_double_convert (void)
- { static double data [] =
- { 0.0, 1.0, -1.0, 1.0 * M_PI, -1.0 * M_PI,
- 1e9, -1e9, 1e-9, -1e-9, 1e-10, -1e-10,
- 1e-19, -1e-19, 1e19, -1e19, 1e-20, -1e-20,
- } ;
- int k ;
- print_test_name (__func__) ;
- for (k = 0 ; k < ARRAY_LEN (data) ; k++)
- { unsigned char bytes [8] ;
- double test ;
- double64_le_write (data [k], bytes) ;
- test = double64_le_read (bytes) ;
- if (fabs (data [k] - test) > 1e-20)
- { printf ("nnLine %d : Test %d, little endian error %.15g -> %.15g.nn", __LINE__, k, data [k], test ) ;
- exit (1) ;
- } ;
- double64_be_write (data [k], bytes) ;
- test = double64_be_read (bytes) ;
- if (fabs (data [k] - test) > 1e-20)
- { printf ("nnLine %d : Test %d, big endian error %.15g -> %.15g.nn", __LINE__, k, data [k], test) ;
- exit (1) ;
- } ;
- } ;
- puts ("ok") ;
- } /* test_double_convert */