glibc/stdlib/strtol.c
Roland McGrath af5b3bc33b Mon Jul 8 02:14:25 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* libc-symbols.h [GCC >= 2.7] (strong_alias, weak_alias): Use extern
	storage class.  GCC gives an error for non-extern data defns with the
	alias attribute.

Mon Jul  8 00:11:15 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>

	* libc-symbols.h (weak_function): New macro.
	For GCC 2.7+ define as __attribute__ ((weak)).
	* elf/dl-minimal.c: Use weak_function as keyword in function defns
 	instead of weak_symbol (NAME) after the defn.
	* stdlib/strtol.c: Likewise.
	* sysdeps/mach/hurd/dl-sysdep.c: Likewise.

	* sysdeps/alpha/dl-machine.h (elf_machine_rela) [RTLD_BOOTSTRAP]:
	If this is defined, don't declare _dl_rtld_map as weak, and
	don't check for MAP pointing to it.  RESOLVE is always null in this
	case, so test with #ifdef instead of if.

	* libc-symbols.h (symbol_set_declare): Use weak_extern instead of
	weak_symbol.
	* csu/initfini.c (_init): Likewise.
	* locale/setlocale.c (DEFINE_CATEGORY): Likewise.
	* misc/efgcvt_r.c: Likewise.
	* sysdeps/alpha/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/i386/dl-machine.h (elf_machine_rel): Likewise.

	* libc-symbols.h [ASSEMBLER] (weak_symbol): Macro removed.
	It was not used in any assembler code.
	(weak_symbol_asm): Renamed to weak_extern_asm.
	(weak_extern): New macro replaces weak_symbol for weak extern refs;
	define to weak_extern_asm for [!ASSEMBLER].

	* libc-symbols.h [! ASSEMBLER] [HAVE_WEAK_SYMBOLS] (weak_symbol_asm,
	weak_alias_asm): New macros, renamed from weak_symbol/weak_alias;
	define those now as aliases.
	Change conditional to use __attribute__ syntax for GCC 2.7+, not 2.8+
	[GCC >= 2.7] [HAVE_WEAK_SYMBOLS] (weak_symbol): Do weak_symbol_asm
	after GCC weak attribute decl.
1996-07-08 06:18:25 +00:00

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/* Copyright (C) 1991, 92, 94, 95, 96 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef _LIBC
# define USE_NUMBER_GROUPING
# define STDC_HEADERS
# define HAVE_LIMITS_H
#endif
#include <ctype.h>
#include <errno.h>
#ifndef errno
extern int errno;
#endif
#ifdef HAVE_LIMITS_H
# include <limits.h>
#endif
#ifdef STDC_HEADERS
# include <stddef.h>
# include <stdlib.h>
# include <string.h>
#else
# ifndef NULL
# define NULL 0
# endif
#endif
#ifdef USE_NUMBER_GROUPING
# include "../locale/localeinfo.h"
#endif
/* Nonzero if we are defining `strtoul' or `strtouq', operating on
unsigned integers. */
#ifndef UNSIGNED
# define UNSIGNED 0
# define INT LONG int
#else
# define INT unsigned LONG int
#endif
/* Determine the name. */
#if UNSIGNED
# ifdef USE_WIDE_CHAR
# ifdef QUAD
# define strtol wcstouq
# else
# define strtol wcstoul
# endif
# else
# ifdef QUAD
# define strtol strtouq
# else
# define strtol strtoul
# endif
# endif
#else
# ifdef USE_WIDE_CHAR
# ifdef QUAD
# define strtol wcstoq
# else
# define strtol wcstol
# endif
# else
# ifdef QUAD
# define strtol strtoq
# endif
# endif
#endif
/* If QUAD is defined, we are defining `strtoq' or `strtouq',
operating on `long long int's. */
#ifdef QUAD
# define LONG long long
# undef LONG_MIN
# define LONG_MIN LONG_LONG_MIN
# undef LONG_MAX
# define LONG_MAX LONG_LONG_MAX
# undef ULONG_MAX
# define ULONG_MAX ULONG_LONG_MAX
# 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 ULONG_MAX
# define ULONG_MAX maxquad
# endif
#else
# define LONG long
#ifndef ULONG_MAX
# define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
#endif
#ifndef LONG_MAX
# define LONG_MAX ((long int) (ULONG_MAX >> 1))
#endif
#endif
#ifdef USE_WIDE_CHAR
# include <wchar.h>
# include <wctype.h>
# define L_(ch) L##ch
# define UCHAR_TYPE wint_t
# define STRING_TYPE wchar_t
# define ISSPACE(ch) iswspace (ch)
# define ISALPHA(ch) iswalpha (ch)
# define TOUPPER(ch) towupper (ch)
#else
# define L_(ch) ch
# define UCHAR_TYPE unsigned char
# define STRING_TYPE char
# define ISSPACE(ch) isspace (ch)
# define ISALPHA(ch) isalpha (ch)
# define TOUPPER(ch) toupper (ch)
#endif
#ifdef __STDC__
# define INTERNAL(x) INTERNAL1(x)
# define INTERNAL1(x) __##x##_internal
# define WEAKNAME(x) WEAKNAME1(x)
#else
# define INTERNAL(x) __/**/x/**/_internal
#endif
#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) (nptr, endptr, base, group)
const STRING_TYPE *nptr;
STRING_TYPE **endptr;
int base;
int group;
{
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
/* The thousands character of the current locale. */
wchar_t thousands;
/* 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 (mbtowc (&thousands, _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
thousands = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
if (thousands == L'\0')
grouping = NULL;
}
}
else
grouping = NULL;
#endif
if (base < 0 || base == 1 || base > 36)
base = 10;
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;
if (base == 16 && s[0] == L_('0') && TOUPPER (s[1]) == L_('X'))
s += 2;
/* If BASE is zero, figure it out ourselves. */
if (base == 0)
if (*s == L_('0'))
{
if (TOUPPER (s[1]) == L_('X'))
{
s += 2;
base = 16;
}
else
base = 8;
}
else
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 = ULONG_MAX / (unsigned LONG int) base;
cutlim = 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) (LONG_MIN + 1)) + 1
: (unsigned LONG int) LONG_MAX))
overflow = 1;
#endif
if (overflow)
{
errno = ERANGE;
#if UNSIGNED
return ULONG_MAX;
#else
return negative ? LONG_MIN : 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 (nptr, endptr, base)
const STRING_TYPE *nptr;
STRING_TYPE **endptr;
int base;
{
return INTERNAL (strtol) (nptr, endptr, base, 0);
}