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+/* Convert string representation of a number into an integer value.
+
+ Copyright (C) 1991, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2003, 2005,
+ 2006, 2007
+ Free Software Foundation, Inc.
+
+ NOTE: The canonical source of this file is maintained with the GNU C
+ Library. Bugs can be reported to bug-glibc@gnu.org.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifdef _LIBC
+# define USE_NUMBER_GROUPING
+#else
+# include <config.h>
+#endif
+
+#include <ctype.h>
+#include <errno.h>
+#ifndef __set_errno
+# define __set_errno(Val) errno = (Val)
+#endif
+
+#include <limits.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef USE_NUMBER_GROUPING
+# include "../locale/localeinfo.h"
+#endif
+
+/* Nonzero if we are defining `strtoul' or `strtoull', operating on
+ unsigned integers. */
+#ifndef UNSIGNED
+# define UNSIGNED 0
+# define INT LONG int
+#else
+# define INT unsigned LONG int
+#endif
+
+/* Determine the name. */
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# if UNSIGNED
+# ifdef USE_WIDE_CHAR
+# ifdef QUAD
+# define strtol __wcstoull_l
+# else
+# define strtol __wcstoul_l
+# endif
+# else
+# ifdef QUAD
+# define strtol __strtoull_l
+# else
+# define strtol __strtoul_l
+# endif
+# endif
+# else
+# ifdef USE_WIDE_CHAR
+# ifdef QUAD
+# define strtol __wcstoll_l
+# else
+# define strtol __wcstol_l
+# endif
+# else
+# ifdef QUAD
+# define strtol __strtoll_l
+# else
+# define strtol __strtol_l
+# endif
+# endif
+# endif
+#else
+# if UNSIGNED
+# ifdef USE_WIDE_CHAR
+# ifdef QUAD
+# define strtol wcstoull
+# else
+# define strtol wcstoul
+# endif
+# else
+# ifdef QUAD
+# define strtol strtoull
+# else
+# define strtol strtoul
+# endif
+# endif
+# else
+# ifdef USE_WIDE_CHAR
+# ifdef QUAD
+# define strtol wcstoll
+# else
+# define strtol wcstol
+# endif
+# else
+# ifdef QUAD
+# define strtol strtoll
+# endif
+# endif
+# endif
+#endif
+
+/* If QUAD is defined, we are defining `strtoll' or `strtoull',
+ operating on `long long int's. */
+#ifdef QUAD
+# define LONG long long
+# define STRTOL_LONG_MIN LONG_LONG_MIN
+# define STRTOL_LONG_MAX LONG_LONG_MAX
+# define STRTOL_ULONG_MAX ULONG_LONG_MAX
+
+/* The extra casts in the following macros work around compiler bugs,
+ e.g., in Cray C 5.0.3.0. */
+
+/* True if negative values of the signed integer type T use two's
+ complement, ones' complement, or signed magnitude representation,
+ respectively. Much GNU code assumes two's complement, but some
+ people like to be portable to all possible C hosts. */
+# define TYPE_TWOS_COMPLEMENT(t) ((t) ~ (t) 0 == (t) -1)
+# define TYPE_ONES_COMPLEMENT(t) ((t) ~ (t) 0 == 0)
+# define TYPE_SIGNED_MAGNITUDE(t) ((t) ~ (t) 0 < (t) -1)
+
+/* True if the arithmetic type T is signed. */
+# define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+
+/* The maximum and minimum values for the integer type T. These
+ macros have undefined behavior if T is signed and has padding bits.
+ If this is a problem for you, please let us know how to fix it for
+ your host. */
+# define TYPE_MINIMUM(t) \
+ ((t) (! TYPE_SIGNED (t) \
+ ? (t) 0 \
+ : TYPE_SIGNED_MAGNITUDE (t) \
+ ? ~ (t) 0 \
+ : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))
+# define TYPE_MAXIMUM(t) \
+ ((t) (! TYPE_SIGNED (t) \
+ ? (t) -1 \
+ : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))
+
+# ifndef ULONG_LONG_MAX
+# define ULONG_LONG_MAX TYPE_MAXIMUM (unsigned long long)
+# endif
+# ifndef LONG_LONG_MAX
+# define LONG_LONG_MAX TYPE_MAXIMUM (long long int)
+# endif
+# ifndef LONG_LONG_MIN
+# define LONG_LONG_MIN TYPE_MINIMUM (long long int)
+# endif
+
+# if __GNUC__ == 2 && __GNUC_MINOR__ < 7
+ /* Work around gcc bug with using this constant. */
+ static const unsigned long long int maxquad = ULONG_LONG_MAX;
+# undef STRTOL_ULONG_MAX
+# define STRTOL_ULONG_MAX maxquad
+# endif
+#else
+# define LONG long
+# define STRTOL_LONG_MIN LONG_MIN
+# define STRTOL_LONG_MAX LONG_MAX
+# define STRTOL_ULONG_MAX ULONG_MAX
+#endif
+
+
+/* We use this code also for the extended locale handling where the
+ function gets as an additional argument the locale which has to be
+ used. To access the values we have to redefine the _NL_CURRENT
+ macro. */
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# undef _NL_CURRENT
+# define _NL_CURRENT(category, item) \
+ (current->values[_NL_ITEM_INDEX (item)].string)
+# define LOCALE_PARAM , loc
+# define LOCALE_PARAM_PROTO , __locale_t loc
+#else
+# define LOCALE_PARAM
+# define LOCALE_PARAM_PROTO
+#endif
+
+#include <wchar.h>
+
+#ifdef USE_WIDE_CHAR
+# include <wctype.h>
+# define L_(Ch) L##Ch
+# define UCHAR_TYPE wint_t
+# define STRING_TYPE wchar_t
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# define ISSPACE(Ch) __iswspace_l ((Ch), loc)
+# define ISALPHA(Ch) __iswalpha_l ((Ch), loc)
+# define TOUPPER(Ch) __towupper_l ((Ch), loc)
+# else
+# define ISSPACE(Ch) iswspace (Ch)
+# define ISALPHA(Ch) iswalpha (Ch)
+# define TOUPPER(Ch) towupper (Ch)
+# endif
+#else
+# define L_(Ch) Ch
+# define UCHAR_TYPE unsigned char
+# define STRING_TYPE char
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# define ISSPACE(Ch) __isspace_l ((Ch), loc)
+# define ISALPHA(Ch) __isalpha_l ((Ch), loc)
+# define TOUPPER(Ch) __toupper_l ((Ch), loc)
+# else
+# define ISSPACE(Ch) isspace (Ch)
+# define ISALPHA(Ch) isalpha (Ch)
+# define TOUPPER(Ch) toupper (Ch)
+# endif
+#endif
+
+#define INTERNAL(X) INTERNAL1(X)
+#define INTERNAL1(X) __##X##_internal
+#define WEAKNAME(X) WEAKNAME1(X)
+
+#ifdef USE_NUMBER_GROUPING
+/* This file defines a function to check for correct grouping. */
+# include "grouping.h"
+#endif
+
+
+
+/* Convert NPTR to an `unsigned long int' or `long int' in base BASE.
+ If BASE is 0 the base is determined by the presence of a leading
+ zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
+ If BASE is < 2 or > 36, it is reset to 10.
+ If ENDPTR is not NULL, a pointer to the character after the last
+ one converted is stored in *ENDPTR. */
+
+INT
+INTERNAL (strtol) (const STRING_TYPE *nptr, STRING_TYPE **endptr,
+ int base, int group LOCALE_PARAM_PROTO)
+{
+ int negative;
+ register unsigned LONG int cutoff;
+ register unsigned int cutlim;
+ register unsigned LONG int i;
+ register const STRING_TYPE *s;
+ register UCHAR_TYPE c;
+ const STRING_TYPE *save, *end;
+ int overflow;
+
+#ifdef USE_NUMBER_GROUPING
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+ struct locale_data *current = loc->__locales[LC_NUMERIC];
+# endif
+ /* The thousands character of the current locale. */
+ wchar_t thousands = L'\0';
+ /* The numeric grouping specification of the current locale,
+ in the format described in <locale.h>. */
+ const char *grouping;
+
+ if (group)
+ {
+ grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
+ if (*grouping <= 0 || *grouping == CHAR_MAX)
+ grouping = NULL;
+ else
+ {
+ /* Figure out the thousands separator character. */
+# if defined _LIBC || defined _HAVE_BTOWC
+ thousands = __btowc (*_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP));
+ if (thousands == WEOF)
+ thousands = L'\0';
+# endif
+ if (thousands == L'\0')
+ grouping = NULL;
+ }
+ }
+ else
+ grouping = NULL;
+#endif
+
+ if (base < 0 || base == 1 || base > 36)
+ {
+ __set_errno (EINVAL);
+ return 0;
+ }
+
+ save = s = nptr;
+
+ /* Skip white space. */
+ while (ISSPACE (*s))
+ ++s;
+ if (*s == L_('\0'))
+ goto noconv;
+
+ /* Check for a sign. */
+ if (*s == L_('-'))
+ {
+ negative = 1;
+ ++s;
+ }
+ else if (*s == L_('+'))
+ {
+ negative = 0;
+ ++s;
+ }
+ else
+ negative = 0;
+
+ /* Recognize number prefix and if BASE is zero, figure it out ourselves. */
+ if (*s == L_('0'))
+ {
+ if ((base == 0 || base == 16) && TOUPPER (s[1]) == L_('X'))
+ {
+ s += 2;
+ base = 16;
+ }
+ else if (base == 0)
+ base = 8;
+ }
+ else if (base == 0)
+ base = 10;
+
+ /* Save the pointer so we can check later if anything happened. */
+ save = s;
+
+#ifdef USE_NUMBER_GROUPING
+ if (group)
+ {
+ /* Find the end of the digit string and check its grouping. */
+ end = s;
+ for (c = *end; c != L_('\0'); c = *++end)
+ if ((wchar_t) c != thousands
+ && ((wchar_t) c < L_('0') || (wchar_t) c > L_('9'))
+ && (!ISALPHA (c) || (int) (TOUPPER (c) - L_('A') + 10) >= base))
+ break;
+ if (*s == thousands)
+ end = s;
+ else
+ end = correctly_grouped_prefix (s, end, thousands, grouping);
+ }
+ else
+#endif
+ end = NULL;
+
+ cutoff = STRTOL_ULONG_MAX / (unsigned LONG int) base;
+ cutlim = STRTOL_ULONG_MAX % (unsigned LONG int) base;
+
+ overflow = 0;
+ i = 0;
+ for (c = *s; c != L_('\0'); c = *++s)
+ {
+ if (s == end)
+ break;
+ if (c >= L_('0') && c <= L_('9'))
+ c -= L_('0');
+ else if (ISALPHA (c))
+ c = TOUPPER (c) - L_('A') + 10;
+ else
+ break;
+ if ((int) c >= base)
+ break;
+ /* Check for overflow. */
+ if (i > cutoff || (i == cutoff && c > cutlim))
+ overflow = 1;
+ else
+ {
+ i *= (unsigned LONG int) base;
+ i += c;
+ }
+ }
+
+ /* Check if anything actually happened. */
+ if (s == save)
+ goto noconv;
+
+ /* Store in ENDPTR the address of one character
+ past the last character we converted. */
+ if (endptr != NULL)
+ *endptr = (STRING_TYPE *) s;
+
+#if !UNSIGNED
+ /* Check for a value that is within the range of
+ `unsigned LONG int', but outside the range of `LONG int'. */
+ if (overflow == 0
+ && i > (negative
+ ? -((unsigned LONG int) (STRTOL_LONG_MIN + 1)) + 1
+ : (unsigned LONG int) STRTOL_LONG_MAX))
+ overflow = 1;
+#endif
+
+ if (overflow)
+ {
+ __set_errno (ERANGE);
+#if UNSIGNED
+ return STRTOL_ULONG_MAX;
+#else
+ return negative ? STRTOL_LONG_MIN : STRTOL_LONG_MAX;
+#endif
+ }
+
+ /* Return the result of the appropriate sign. */
+ return negative ? -i : i;
+
+noconv:
+ /* We must handle a special case here: the base is 0 or 16 and the
+ first two characters are '0' and 'x', but the rest are no
+ hexadecimal digits. This is no error case. We return 0 and
+ ENDPTR points to the `x`. */
+ if (endptr != NULL)
+ {
+ if (save - nptr >= 2 && TOUPPER (save[-1]) == L_('X')
+ && save[-2] == L_('0'))
+ *endptr = (STRING_TYPE *) &save[-1];
+ else
+ /* There was no number to convert. */
+ *endptr = (STRING_TYPE *) nptr;
+ }
+
+ return 0L;
+}
+
+/* External user entry point. */
+
+
+INT
+#ifdef weak_function
+weak_function
+#endif
+strtol (const STRING_TYPE *nptr, STRING_TYPE **endptr,
+ int base LOCALE_PARAM_PROTO)
+{
+ return INTERNAL (strtol) (nptr, endptr, base, 0 LOCALE_PARAM);
+}