Change the PciBusDxe driver to install the PCI enumeration complete GUID in the PCI...

[mirror_edk2.git] / StdLib / LibC / StdLib / strtoimax.c

/*  $NetBSD: strtoimax.c,v 1.4 2005/11/29 03:12:00 christos Exp $ */\r
\r
/*-\r
 * Copyright (c) 1992, 1993\r
 *  The Regents of the University of California.  All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. Neither the name of the University nor the names of its contributors\r
 *    may be used to endorse or promote products derived from this software\r
 *    without specific prior written permission.\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r
 * SUCH DAMAGE.\r
 */\r
#include  <LibConfig.h>\r
#include <sys/EfiCdefs.h>\r
#if defined(LIBC_SCCS) && !defined(lint)\r
#if 0\r
static char sccsid[] = "from: @(#)strtoq.c  8.1 (Berkeley) 6/4/93";\r
#else\r
__RCSID("$NetBSD: strtoimax.c,v 1.4 2005/11/29 03:12:00 christos Exp $");\r
#endif\r
#endif /* LIBC_SCCS and not lint */\r
\r
#include "namespace.h"\r
\r
#include <assert.h>\r
#include <ctype.h>\r
#include <errno.h>\r
#include <inttypes.h>\r
#include <stddef.h>\r
\r
#ifdef __weak_alias\r
__weak_alias(strtoimax, _strtoimax)\r
#endif\r
\r
/*\r
 * Convert a string to an intmax_t.\r
 *\r
 * Ignores `locale' stuff.  Assumes that the upper and lower case\r
 * alphabets and digits are each contiguous.\r
 */\r
intmax_t\r
_strtoimax(const char *nptr, char **endptr, int base)\r
{\r
  const char *s;\r
  intmax_t acc, cutoff;\r
  int c;\r
  int neg, any, cutlim;\r
\r
  _DIAGASSERT(nptr != NULL);\r
  /* endptr may be NULL */\r
\r
#ifdef __GNUC__\r
  /* This outrageous construct just to shut up a GCC warning. */\r
  (void) &acc; (void) &cutoff;\r
#endif\r
\r
  /*\r
   * Skip white space and pick up leading +/- sign if any.\r
   * If base is 0, allow 0x for hex and 0 for octal, else\r
   * assume decimal; if base is already 16, allow 0x.\r
   */\r
  s = nptr;\r
  do {\r
    c = (unsigned char) *s++;\r
  } while (isspace(c));\r
  if (c == '-') {\r
    neg = 1;\r
    c = *s++;\r
  } else {\r
    neg = 0;\r
    if (c == '+')\r
      c = *s++;\r
  }\r
  if ((base == 0 || base == 16) &&\r
      c == '0' && (*s == 'x' || *s == 'X')) {\r
    c = s[1];\r
    s += 2;\r
    base = 16;\r
  }\r
  if (base == 0)\r
    base = c == '0' ? 8 : 10;\r
\r
  /*\r
   * Compute the cutoff value between legal numbers and illegal\r
   * numbers.  That is the largest legal value, divided by the\r
   * base.  An input number that is greater than this value, if\r
   * followed by a legal input character, is too big.  One that\r
   * is equal to this value may be valid or not; the limit\r
   * between valid and invalid numbers is then based on the last\r
   * digit.  For instance, if the range for intmax_t is\r
   * [-9223372036854775808..9223372036854775807] and the input base\r
   * is 10, cutoff will be set to 922337203685477580 and cutlim to\r
   * either 7 (neg==0) or 8 (neg==1), meaning that if we have\r
   * accumulated a value > 922337203685477580, or equal but the\r
   * next digit is > 7 (or 8), the number is too big, and we will\r
   * return a range error.\r
   *\r
   * Set any if any `digits' consumed; make it negative to indicate\r
   * overflow.\r
   */\r
  cutoff = neg ? INTMAX_MIN : INTMAX_MAX;\r
  cutlim = (int)(cutoff % base);\r
  cutoff /= base;\r
  if (neg) {\r
    if (cutlim > 0) {\r
      cutlim -= base;\r
      cutoff += 1;\r
    }\r
    cutlim = -cutlim;\r
  }\r
  for (acc = 0, any = 0;; c = (unsigned char) *s++) {\r
    if (isdigit(c))\r
      c -= '0';\r
    else if (isalpha(c))\r
      c -= isupper(c) ? 'A' - 10 : 'a' - 10;\r
    else\r
      break;\r
    if (c >= base)\r
      break;\r
    if (any < 0)\r
      continue;\r
    if (neg) {\r
      if (acc < cutoff || (acc == cutoff && c > cutlim)) {\r
        any = -1;\r
        acc = INTMAX_MIN;\r
        errno = ERANGE;\r
      } else {\r
        any = 1;\r
        acc *= base;\r
        acc -= c;\r
      }\r
    } else {\r
      if (acc > cutoff || (acc == cutoff && c > cutlim)) {\r
        any = -1;\r
        acc = INTMAX_MAX;\r
        errno = ERANGE;\r
      } else {\r
        any = 1;\r
        acc *= base;\r
        acc += c;\r
      }\r
    }\r
  }\r
  if (endptr != 0)\r
    *endptr = (char *)(any ? s - 1 : nptr);\r
    //*endptr = __UNCONST(any ? s - 1 : nptr);\r
  return (acc);\r
}\r