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/*@@
@file DatatypeConversion.c
@date Thursday Nov 23 2000
@author Thomas Radke
@desc
Predefined datatype conversion routines for hyperslab extraction.
@enddesc
@version $Id$
@@*/
#include "cctk.h"
#include "PUGHSlab.h"
#include "PUGHSlabi.h"
/* the rcs ID and its dummy function to use it */
static const char *rcsid="$Id$";
CCTK_FILEVERSION(CactusPUGH_PUGHSlab_DatatypeConversion_c)
/* macro to generate a predefined conversion function
along with its prototype */
#define CONVERSION_FUNCTION(src_type, dst_type, dst_scalartype, conversion) \
static void Convert_##src_type##_to_##dst_type (const void *src, \
void *dst, \
CCTK_INT nelems, \
CCTK_INT src_stride, \
CCTK_INT dst_stride); \
\
static void Convert_##src_type##_to_##dst_type (const void *src, \
void *dst, \
CCTK_INT nelems, \
CCTK_INT src_stride, \
CCTK_INT dst_stride) \
{ \
dst_type *_dst = (dst_type *) dst; \
const src_type *_src = (const src_type *) src; \
\
\
while (nelems--) \
{ \
conversion (*_src, *_dst, dst_scalartype); \
_src += src_stride; _dst += dst_stride; \
} \
}
/* the conversion of scalar datatypes (integers and reals) */
#ifdef CONVERT
#undef CONVERT
#endif
#define CONVERT(src, dst, dst_type) (dst) = (dst_type) (src)
/* predefined conversion functions for integers */
#if defined(CCTK_INT2) && defined(CCTK_INT4)
CONVERSION_FUNCTION (CCTK_INT4, CCTK_INT2, CCTK_INT2, CONVERT)
#endif
#if defined(CCTK_INT2) && defined(CCTK_INT8)
CONVERSION_FUNCTION (CCTK_INT8, CCTK_INT2, CCTK_INT2, CONVERT)
#endif
#if defined(CCTK_INT4) && defined(CCTK_INT8)
CONVERSION_FUNCTION (CCTK_INT8, CCTK_INT4, CCTK_INT4, CONVERT)
#endif
/* predefined conversion functions for reals */
#if defined(CCTK_REAL4) && defined(CCTK_REAL8)
CONVERSION_FUNCTION (CCTK_REAL8, CCTK_REAL4, CCTK_REAL4, CONVERT)
#endif
#if defined(CCTK_REAL4) && defined(CCTK_REAL16)
CONVERSION_FUNCTION (CCTK_REAL16, CCTK_REAL4, CCTK_REAL4, CONVERT)
#endif
#if defined(CCTK_REAL8) && defined(CCTK_REAL16)
CONVERSION_FUNCTION (CCTK_REAL16, CCTK_REAL8, CCTK_REAL8, CONVERT)
#endif
/* the conversion of complex datatypes */
#undef CONVERT
#define CONVERT(src, dst, dst_type) (dst).Re = (dst_type) (src).Re; \
(dst).Im = (dst_type) (src).Im
/* predefined conversion functions for complex */
#if defined(CCTK_REAL4) && defined(CCTK_REAL8)
CONVERSION_FUNCTION (CCTK_COMPLEX16, CCTK_COMPLEX8, CCTK_REAL4, CONVERT)
#endif
#if defined(CCTK_REAL4) && defined(CCTK_REAL16)
CONVERSION_FUNCTION (CCTK_COMPLEX32, CCTK_COMPLEX16, CCTK_REAL8, CONVERT)
#endif
#if defined(CCTK_REAL8) && defined(CCTK_REAL16)
CONVERSION_FUNCTION (CCTK_COMPLEX32, CCTK_COMPLEX8, CCTK_REAL4, CONVERT)
#endif
/* prototypes of routines defined in this source file */
static int PUGHSlabi_PrecisionVarType (int type);
/*@@
@routine PUGHSlabi_GetDatatypeConversionFn
@date Fri 23 Nov 2000
@author Thomas Radke
@desc
Finds a predefined datatype conversion function.
@enddesc
@calls PUGHSlab_REAL8_to_REAL4
@var src_type
@vdesc CCTK datatype of the source
@vtype int
@vio in
@endvar
@var dst_type
@vdesc CCTK datatype of the destination (hyperslab datatype)
@vtype int
@vio in
@endvar
@returntype PUGHSlab_conversion_fn
@returndesc
the appropriate function pointer
or NULL if no predefined conversion function was found
@endreturndesc
@@*/
t_hslabConversionFn PUGHSlabi_GetDatatypeConversionFn (int src_type,
int dst_type)
{
t_hslabConversionFn retval;
/* get the precision datatype for generic CCTK_TYPE variable types */
src_type = PUGHSlabi_PrecisionVarType (src_type);
dst_type = PUGHSlabi_PrecisionVarType (dst_type);
/* get the appropriate conversion routine */
if (0)
{
/* this is just because of the following #ifdef'ed else branches */
}
#if defined(CCTK_INT2) && defined(CCTK_INT4)
else if (src_type == CCTK_VARIABLE_INT4 && dst_type == CCTK_VARIABLE_INT2)
{
retval = Convert_CCTK_INT4_to_CCTK_INT2;
}
#endif
#if defined(CCTK_INT2) && defined(CCTK_INT8)
else if (src_type == CCTK_VARIABLE_INT8 && dst_type == CCTK_VARIABLE_INT2)
{
retval = Convert_CCTK_INT8_to_CCTK_INT2;
}
#endif
#if defined(CCTK_INT4) && defined(CCTK_INT8)
else if (src_type == CCTK_VARIABLE_INT8 && dst_type == CCTK_VARIABLE_INT4)
{
retval = Convert_CCTK_INT8_to_CCTK_INT4;
}
#endif
#if defined(CCTK_REAL4) && defined(CCTK_REAL8)
else if (src_type == CCTK_VARIABLE_REAL8 && dst_type == CCTK_VARIABLE_REAL4)
{
retval = Convert_CCTK_REAL8_to_CCTK_REAL4;
}
#endif
#if defined(CCTK_REAL4) && defined(CCTK_REAL16)
else if (src_type == CCTK_VARIABLE_REAL16 && dst_type == CCTK_VARIABLE_REAL4)
{
retval = Convert_CCTK_REAL16_to_CCTK_REAL4;
}
#endif
#if defined(CCTK_REAL8) && defined(CCTK_REAL16)
else if (src_type == CCTK_VARIABLE_REAL16 && dst_type == CCTK_VARIABLE_REAL8)
{
retval = Convert_CCTK_REAL16_to_CCTK_REAL8;
}
#endif
#if defined(CCTK_REAL4) && defined(CCTK_REAL8)
else if (src_type == CCTK_VARIABLE_COMPLEX16 && dst_type == CCTK_VARIABLE_COMPLEX8)
{
retval = Convert_CCTK_COMPLEX16_to_CCTK_COMPLEX8;
}
#endif
#if defined(CCTK_REAL8) && defined(CCTK_REAL16)
else if (src_type == CCTK_VARIABLE_COMPLEX32 && dst_type == CCTK_VARIABLE_COMPLEX8)
{
retval = Convert_CCTK_COMPLEX32_to_CCTK_COMPLEX8;
}
#endif
#if defined(CCTK_REAL8) && defined(CCTK_REAL16)
else if (src_type == CCTK_VARIABLE_COMPLEX32 && dst_type == CCTK_VARIABLE_COMPLEX16)
{
retval = Convert_CCTK_COMPLEX32_to_CCTK_COMPLEX16;
}
#endif
else
{
retval = NULL;
}
return (retval);
}
/**************************************************************************/
/* local functions */
/**************************************************************************/
/* get the precision datatype for generic CCTK_TYPE variable types */
static int PUGHSlabi_PrecisionVarType (int type)
{
if (type == CCTK_VARIABLE_INT)
{
#ifdef CCTK_INTEGER_PRECISION_8
type = CCTK_VARIABLE_INT8;
#elif CCTK_INTEGER_PRECISION_4
type = CCTK_VARIABLE_INT4;
#elif CCTK_INTEGER_PRECISION_2
type = CCTK_VARIABLE_INT2;
#endif
}
else if (type == CCTK_VARIABLE_REAL)
{
#ifdef CCTK_REAL_PRECISION_16
type = CCTK_VARIABLE_REAL16;
#elif CCTK_REAL_PRECISION_8
type = CCTK_VARIABLE_REAL8;
#elif CCTK_REAL_PRECISION_4
type = CCTK_VARIABLE_REAL4;
#endif
}
else if (type == CCTK_VARIABLE_COMPLEX)
{
#ifdef CCTK_REAL_PRECISION_16
type = CCTK_VARIABLE_COMPLEX32;
#elif CCTK_REAL_PRECISION_8
type = CCTK_VARIABLE_COMPLEX16;
#elif CCTK_REAL_PRECISION_4
type = CCTK_VARIABLE_COMPLEX8;
#endif
}
return (type);
}
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