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  1. /****************************************************************
  2.  
  3. The author of this software is David M. Gay.
  4.  
  5. Copyright (C) 1998, 2000 by Lucent Technologies
  6. All Rights Reserved
  7.  
  8. Permission to use, copy, modify, and distribute this software and
  9. its documentation for any purpose and without fee is hereby
  10. granted, provided that the above copyright notice appear in all
  11. copies and that both that the copyright notice and this
  12. permission notice and warranty disclaimer appear in supporting
  13. documentation, and that the name of Lucent or any of its entities
  14. not be used in advertising or publicity pertaining to
  15. distribution of the software without specific, written prior
  16. permission.
  17.  
  18. LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19. INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
  20. IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
  21. SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  22. WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
  23. IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  24. ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
  25. THIS SOFTWARE.
  26.  
  27. ****************************************************************/
  28.  
  29. /* Please send bug reports to David M. Gay (dmg at acm dot org,
  30.  * with " at " changed at "@" and " dot " changed to ".").      */
  31.  
  32. #include <_ansi.h>
  33. #include <errno.h>
  34. #include <stdlib.h>
  35. #include <string.h>
  36. #include "mprec.h"
  37. #include "gdtoa.h"
  38. #include "gd_qnan.h"
  39.  
  40. #if defined (_HAVE_LONG_DOUBLE) && !defined (_LDBL_EQ_DBL)
  41.  
  42. #undef _0
  43. #undef _1
  44.  
  45. /* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
  46.  
  47. #ifdef IEEE_MC68k
  48. #define _0 0
  49. #define _1 1
  50. #define _2 2
  51. #define _3 3
  52. #define _4 4
  53. #endif
  54. #ifdef IEEE_8087
  55. #define _0 4
  56. #define _1 3
  57. #define _2 2
  58. #define _3 1
  59. #define _4 0
  60. #endif
  61.  
  62.  void
  63. #ifdef KR_headers
  64. ULtox(L, bits, exp, k) __UShort *L; __ULong *bits; Long exp; int k;
  65. #else
  66. ULtox(__UShort *L, __ULong *bits, Long exp, int k)
  67. #endif
  68. {
  69.         switch(k & STRTOG_Retmask) {
  70.           case STRTOG_NoNumber:
  71.           case STRTOG_Zero:
  72.                 L[0] = L[1] = L[2] = L[3] = L[4] = 0;
  73.                 break;
  74.  
  75.           case STRTOG_Denormal:
  76.                 L[_0] = 0;
  77.                 goto normal_bits;
  78.  
  79.           case STRTOG_Normal:
  80.           case STRTOG_NaNbits:
  81.                 L[_0] = exp + 0x3fff + 63;
  82.  normal_bits:
  83.                 L[_4] = (__UShort)bits[0];
  84.                 L[_3] = (__UShort)(bits[0] >> 16);
  85.                 L[_2] = (__UShort)bits[1];
  86.                 L[_1] = (__UShort)(bits[1] >> 16);
  87.                 break;
  88.  
  89.           case STRTOG_Infinite:
  90.                 L[_0] = 0x7fff;
  91.                 L[_1] = L[_2] = L[_3] = L[_4] = 0;
  92.                 break;
  93.  
  94.           case STRTOG_NaN:
  95.                 L[0] = ldus_QNAN0;
  96.                 L[1] = ldus_QNAN1;
  97.                 L[2] = ldus_QNAN2;
  98.                 L[3] = ldus_QNAN3;
  99.                 L[4] = ldus_QNAN4;
  100.           }
  101.         if (k & STRTOG_Neg)
  102.                 L[_0] |= 0x8000;
  103.         }
  104.  
  105.  int
  106. #ifdef KR_headers
  107. _strtorx_r(p, s, sp, rounding, L) struct _reent *p; const char *s; char **sp; int rounding; void *L;
  108. #else
  109. _strtorx_r(struct _reent *p, const char *s, char **sp, int rounding, void *L)
  110. #endif
  111. {
  112.         static FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI };
  113.         FPI *fpi, fpi1;
  114.         __ULong bits[2];
  115.         Long exp;
  116.         int k;
  117.  
  118.         fpi = &fpi0;
  119.         if (rounding != FPI_Round_near) {
  120.                 fpi1 = fpi0;
  121.                 fpi1.rounding = rounding;
  122.                 fpi = &fpi1;
  123.                 }
  124.         k = _strtodg_r(p, s, sp, fpi, &exp, bits);
  125.         ULtox((__UShort*)L, bits, exp, k);
  126.         return k;
  127.         }
  128.  
  129. #endif /* _HAVE_LONG_DOUBLE && !_LDBL_EQ_DBL */
  130.