text: /****************************************************************
  
  The author of this software is David M. Gay.
  
  Copyright (C) 1998, 2000 by Lucent Technologies
  All Rights Reserved
  
  Permission to use, copy, modify, and distribute this software and
  its documentation for any purpose and without fee is hereby
  granted, provided that the above copyright notice appear in all
  copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of Lucent or any of its entities
  not be used in advertising or publicity pertaining to
  distribution of the software without specific, written prior
  permission.
  
  LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
  IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
  SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
  IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
  THIS SOFTWARE.
  
  ****************************************************************/
  
  /* Please send bug reports to David M. Gay (dmg at acm dot org,
   * with " at " changed at "@" and " dot " changed to ".").	*/
  
  /* $FreeBSD: soc2013/dpl/head/contrib/gdtoa/strtorQ.c 228034 2011-11-20 14:45:42Z theraven $ */
  
  #include "gdtoaimp.h"
  
  #undef _0
  #undef _1
  
  /* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
  
  #ifdef IEEE_MC68k
  #define _0 0
  #define _1 1
  #define _2 2
  #define _3 3
  #endif
  #ifdef IEEE_8087
  #define _0 3
  #define _1 2
  #define _2 1
  #define _3 0
  #endif
  
   void
  #ifdef KR_headers
  ULtoQ(L, bits, exp, k) ULong *L; ULong *bits; Long exp; int k;
  #else
  ULtoQ(ULong *L, ULong *bits, Long exp, int k)
  #endif
  {
  	switch(k & STRTOG_Retmask) {
  	  case STRTOG_NoNumber:
  	  case STRTOG_Zero:
  		L[0] = L[1] = L[2] = L[3] = 0;
  		break;
  
  	  case STRTOG_Normal:
  		L[_3] = bits[0];
  		L[_2] = bits[1];
  		L[_1] = bits[2];
  		L[_0] = (bits[3] & ~0x10000) | ((exp + 0x3fff + 112) << 16);
  		break;
  
  	  case STRTOG_NaNbits:
  		L[_3] = bits[0];
  		L[_2] = bits[1];
  		L[_1] = bits[2];
  		L[_0] = (bits[3] & ~0x10000)
  		    | (((exp + 0x3fff + 112) << 16) | (1 << 15));
  		break;
  
  	  case STRTOG_Denormal:
  		L[_3] = bits[0];
  		L[_2] = bits[1];
  		L[_1] = bits[2];
  		L[_0] = bits[3];
  		break;
  
  	  case STRTOG_Infinite:
  		L[_0] = 0x7fff0000;
  		L[_1] = L[_2] = L[_3] = 0;
  		break;
  
  	  case STRTOG_NaN:
  		L[0] = ld_QNAN0;
  		L[1] = ld_QNAN1;
  		L[2] = ld_QNAN2;
  		L[3] = ld_QNAN3;
  	  }
  	if (k & STRTOG_Neg)
  		L[_0] |= 0x80000000L;
  	}
  
   int
  #ifdef KR_headers
  strtorQ_l(s, sp, rounding, L, locale) CONST char *s; char **sp; int rounding;
  void *L; locale_t locale;
  #else
  strtorQ_l(CONST char *s, char **sp, int rounding, void *L, locale_t locale)
  #endif
  {
  	static FPI fpi0 = { 113, 1-16383-113+1, 32766-16383-113+1, 1, SI };
  	FPI *fpi, fpi1;
  	ULong bits[4];
  	Long exp;
  	int k;
  
  	fpi = &fpi0;
  	if (rounding != FPI_Round_near) {
  		fpi1 = fpi0;
  		fpi1.rounding = rounding;
  		fpi = &fpi1;
  		}
  	k = strtodg_l(s, sp, fpi, &exp, bits, locale);
  	ULtoQ((ULong*)L, bits, exp, k);
  	return k;
  	}
  