Fix a bug about the iSCSI DHCP dependency issue.

[mirror_edk2.git] / StdLib / LibC / gdtoa / smisc.c

/* $NetBSD: smisc.c,v 1.2.14.1 2008/04/08 21:10:55 jdc Exp $ */\r
\r
/****************************************************************\r
\r
The author of this software is David M. Gay.\r
\r
Copyright (C) 1998, 1999 by Lucent Technologies\r
All Rights Reserved\r
\r
Permission to use, copy, modify, and distribute this software and\r
its documentation for any purpose and without fee is hereby\r
granted, provided that the above copyright notice appear in all\r
copies and that both that the copyright notice and this\r
permission notice and warranty disclaimer appear in supporting\r
documentation, and that the name of Lucent or any of its entities\r
not be used in advertising or publicity pertaining to\r
distribution of the software without specific, written prior\r
permission.\r
\r
LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,\r
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.\r
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY\r
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES\r
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER\r
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,\r
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF\r
THIS SOFTWARE.\r
\r
****************************************************************/\r
\r
/* Please send bug reports to David M. Gay (dmg at acm dot org,\r
 * with " at " changed at "@" and " dot " changed to ".").  */\r
#include  <LibConfig.h>\r
\r
#include "gdtoaimp.h"\r
\r
#if defined(_MSC_VER)           /* Handle Microsoft VC++ compiler specifics. */\r
// Disable: warning C4700: uninitialized local variable 'xx' used\r
#pragma warning ( disable : 4700 )\r
#endif  /* defined(_MSC_VER) */\r
\r
Bigint *\r
s2b\r
#ifdef KR_headers\r
  (s, nd0, nd, y9) CONST char *s; int nd0, nd; ULong y9;\r
#else\r
  (CONST char *s, int nd0, int nd, ULong y9)\r
#endif\r
{\r
  Bigint *b;\r
  int i, k;\r
  Long x, y;\r
\r
  x = (nd + 8) / 9;\r
  for(k = 0, y = 1; x > y; y <<= 1, k++) ;\r
#ifdef Pack_32\r
  b = Balloc(k);\r
  if (b == NULL)\r
    return NULL;\r
  b->x[0] = y9;\r
  b->wds = 1;\r
#else\r
  b = Balloc(k+1);\r
  if (b == NULL)\r
    return NULL;\r
  b->x[0] = y9 & 0xffff;\r
  b->wds = (b->x[1] = y9 >> 16) ? 2 : 1;\r
#endif\r
\r
  i = 9;\r
  if (9 < nd0) {\r
    s += 9;\r
    do  {\r
      b = multadd(b, 10, *s++ - '0');\r
      if (b == NULL)\r
        return NULL;\r
      } while(++i < nd0);\r
    s++;\r
    }\r
  else\r
    s += 10;\r
  for(; i < nd; i++) {\r
    b = multadd(b, 10, *s++ - '0');\r
    if (b == NULL)\r
      return NULL;\r
    }\r
  return b;\r
  }\r
\r
 double\r
ratio\r
#ifdef KR_headers\r
  (a, b) Bigint *a, *b;\r
#else\r
  (Bigint *a, Bigint *b)\r
#endif\r
{\r
  double da, db;\r
  int k, ka, kb;\r
\r
  dval(da) = b2d(a, &ka);\r
  dval(db) = b2d(b, &kb);\r
  k = ka - kb + ULbits*(a->wds - b->wds);\r
#ifdef IBM\r
  if (k > 0) {\r
    word0(da) += (k >> 2)*Exp_msk1;\r
    if (k &= 3)\r
      dval(da) *= 1 << k;\r
    }\r
  else {\r
    k = -k;\r
    word0(db) += (k >> 2)*Exp_msk1;\r
    if (k &= 3)\r
      dval(db) *= 1 << k;\r
    }\r
#else\r
  if (k > 0)\r
    word0(da) += k*Exp_msk1;\r
  else {\r
    k = -k;\r
    word0(db) += k*Exp_msk1;\r
    }\r
#endif\r
  return dval(da) / dval(db);\r
  }\r
\r
#ifdef INFNAN_CHECK\r
\r
 int\r
match\r
#ifdef KR_headers\r
  (sp, t) CONST char **sp, *t;\r
#else\r
  (CONST char **sp, CONST char *t)\r
#endif\r
{\r
  int c, d;\r
  CONST char *s = *sp;\r
\r
  while( (d = *t++) !=0) {\r
    if ((c = *++s) >= 'A' && c <= 'Z')\r
      c += 'a' - 'A';\r
    if (c != d)\r
      return 0;\r
    }\r
  *sp = s + 1;\r
  return 1;\r
  }\r
#endif /* INFNAN_CHECK */\r
\r
 void\r
#ifdef KR_headers\r
copybits(c, n, b) ULong *c; int n; Bigint *b;\r
#else\r
copybits(ULong *c, int n, Bigint *b)\r
#endif\r
{\r
  ULong *ce, *x, *xe;\r
#ifdef Pack_16\r
  int nw, nw1;\r
#endif\r
\r
  ce = c + ((unsigned int)(n-1) >> kshift) + 1;\r
  x = b->x;\r
#ifdef Pack_32\r
  xe = x + b->wds;\r
  while(x < xe)\r
    *c++ = *x++;\r
#else\r
  nw = b->wds;\r
  nw1 = nw & 1;\r
  for(xe = x + (nw - nw1); x < xe; x += 2)\r
    Storeinc(c, x[1], x[0]);\r
  if (nw1)\r
    *c++ = *x;\r
#endif\r
  while(c < ce)\r
    *c++ = 0;\r
  }\r
\r
 ULong\r
#ifdef KR_headers\r
any_on(b, k) Bigint *b; int k;\r
#else\r
any_on(Bigint *b, int k)\r
#endif\r
{\r
  int n, nwds;\r
  ULong *x, *x0, x1, x2;\r
\r
  x = b->x;\r
  nwds = b->wds;\r
  n = (unsigned int)k >> kshift;\r
  if (n > nwds)\r
    n = nwds;\r
  else if (n < nwds && (k &= kmask)) {\r
    x1 = x2 = x[n];\r
    x1 >>= k;\r
    x1 <<= k;\r
    if (x1 != x2)\r
      return 1;\r
    }\r
  x0 = x;\r
  x += n;\r
  while(x > x0)\r
    if (*--x)\r
      return 1;\r
  return 0;\r
  }\r