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/*****************************************************************************
*
* Copyright (c) 2000 - 2010, Lawrence Livermore National Security, LLC
* Produced at the Lawrence Livermore National Laboratory
* LLNL-CODE-400124
* All rights reserved.
*
* This file is part of VisIt. For details, see https://visit.llnl.gov/. The
* full copyright notice is contained in the file COPYRIGHT located at the root
* of the VisIt distribution or at http://www.llnl.gov/visit/copyright.html.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the disclaimer (as noted below) in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of the LLNS/LLNL nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS 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 LAWRENCE LIVERMORE NATIONAL SECURITY,
* LLC, THE U.S. DEPARTMENT OF ENERGY OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*****************************************************************************/
#include<visit-config.h>
#include<convert.h>
#if(SIZEOF_FLOAT == 4)
#ifdef WORDS_BIGENDIAN
static int float_src_format = B32;
#else
static int float_src_format = L32;
#endif
#else
#pragma error "Unsupported float size"
#endif
#define FUNCINDEX(s,d) ((((s) & 3) << 2) | ((d) & 3))
typedef int floatconverter(float, unsigned char *);
/*********************************************************************
* CONVERSION FUNCTIONS
********************************************************************/
/* 32 bit float B->L, L->B. */
static int
float32_Reverse_Endian(float val, unsigned char *outbuf)
{
unsigned char *data = ((unsigned char *)&val) + 3;
unsigned char *out = outbuf;
*out++ = *data--;
*out++ = *data--;
*out++ = *data--;
*out = *data;
return 4;
}
/* 32 bit float - no convert */
static int
float_32_To_32(float val, unsigned char *outbuf)
{
unsigned char *data = ((unsigned char *)&val);
unsigned char *out = outbuf;
*out++ = *data++;
*out++ = *data++;
*out++ = *data++;
*out = *data;
return 4;
}
static int
float_unsupported(float, unsigned char *)
{
return 0;
}
/* Lookup table for which converter function to use. */
static floatconverter *fconvlist[] = {
float_32_To_32,
float_unsupported,
float32_Reverse_Endian,
float_unsupported,
float_unsupported,
float_unsupported,
float_unsupported,
float_unsupported,
float32_Reverse_Endian,
float_unsupported,
float_32_To_32,
float_unsupported,
float_unsupported,
float_unsupported,
float_unsupported,
float_unsupported
};
/*********************************************************************
*
* Purpose: Converts a float on the host platform to a float on the
* destination platform and writes the resulting bytes into
* buf. The size of the converted array is returned.
*
* Programmer: Brad Whitlock
* Date: Tue May 9 10:51:14 PDT 2000
*
* Input Arguments:
* val : The float value to be converted.
* dest_format : The destination platform's format. B32, L32.
* Input / Output Arguments:
* buf : The buffer to hold the resulting bytes.
*
* Modifications:
*
********************************************************************/
int
FloatConvert(float val, unsigned char *buf, int dest_format)
{
return (*(fconvlist[FUNCINDEX(float_src_format, dest_format)]))(val, buf);
}
int FloatSourceFormat()
{
return float_src_format;
}
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