You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
1.7 KiB
64 lines
1.7 KiB
/***
|
|
*fltinf.c - Encode interface for FORTRAN
|
|
*
|
|
* Copyright (c) 1992-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* FORTRAN interface for decimal to binary (input) conversion
|
|
*
|
|
*Revision History:
|
|
* 06-22-92 GDP Modified version of cfin.c for FORTRAN support
|
|
* 04-06-93 SKS Replace _CALLTYPE* with __cdecl
|
|
* 10-06-99 PML Copy a DOUBLE, not double, to avoid exceptions
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <string.h>
|
|
#include <cv.h>
|
|
|
|
static struct _flt ret;
|
|
static FLT flt = &ret;
|
|
|
|
/* Error codes set by this routine */
|
|
#define CFIN_NODIGITS 512
|
|
#define CFIN_OVERFLOW 128
|
|
#define CFIN_UNDERFLOW 256
|
|
#define CFIN_INVALID 64
|
|
|
|
FLT __cdecl _fltinf(const char *str, int len, int scale, int decpt)
|
|
{
|
|
_LDBL12 ld12;
|
|
DOUBLE x;
|
|
const char *EndPtr;
|
|
unsigned flags;
|
|
int retflags = 0;
|
|
|
|
flags = __strgtold12(&ld12, &EndPtr, str, 0, scale, decpt, 1);
|
|
if (flags & SLD_NODIGITS) {
|
|
retflags |= CFIN_NODIGITS;
|
|
*(u_long *)&x = 0;
|
|
*((u_long *)&x+1) = 0;
|
|
}
|
|
else {
|
|
INTRNCVT_STATUS intrncvt;
|
|
|
|
intrncvt = _ld12tod(&ld12, &x);
|
|
|
|
if (flags & SLD_OVERFLOW ||
|
|
intrncvt == INTRNCVT_OVERFLOW) {
|
|
retflags |= CFIN_OVERFLOW;
|
|
}
|
|
if (flags & SLD_UNDERFLOW ||
|
|
intrncvt == INTRNCVT_UNDERFLOW) {
|
|
retflags |= CFIN_UNDERFLOW;
|
|
}
|
|
}
|
|
|
|
flt->nbytes = (int)(EndPtr - str);
|
|
if (len != flt->nbytes)
|
|
retflags |= CFIN_INVALID;
|
|
*(DOUBLE *)&flt->dval = *(DOUBLE *)&x;
|
|
flt->flags = retflags;
|
|
|
|
return flt;
|
|
}
|