mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
95c9a6e806
When the base is 0 or 2 and the first two characters are '0' and 'b', but the rest are no binary digits. In this case this is no error, and strtol must return 0 and ENDPTR points to the 'x' or 'b'. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com>
580 lines
14 KiB
C
580 lines
14 KiB
C
/* Convert string representing a number to integer value, using given locale.
|
||
Copyright (C) 1997-2023 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 Lesser General Public
|
||
License as published by the Free Software Foundation; either
|
||
version 2.1 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
|
||
Lesser General Public License for more details.
|
||
|
||
You should have received a copy of the GNU Lesser General Public
|
||
License along with the GNU C Library; if not, see
|
||
<https://www.gnu.org/licenses/>. */
|
||
|
||
#include <features.h>
|
||
#undef __GLIBC_USE_C2X_STRTOL
|
||
#define __GLIBC_USE_C2X_STRTOL 0
|
||
|
||
#if HAVE_CONFIG_H
|
||
# include <config.h>
|
||
#endif
|
||
|
||
#ifdef _LIBC
|
||
# define USE_NUMBER_GROUPING
|
||
# define HAVE_LIMITS_H
|
||
#endif
|
||
|
||
#include <ctype.h>
|
||
#include <errno.h>
|
||
#ifndef __set_errno
|
||
# define __set_errno(Val) errno = (Val)
|
||
#endif
|
||
|
||
#ifdef HAVE_LIMITS_H
|
||
# include <limits.h>
|
||
#endif
|
||
|
||
#include <stddef.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <locale.h>
|
||
#include <stdint.h>
|
||
#include <bits/wordsize.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. */
|
||
#if UNSIGNED
|
||
# ifdef USE_WIDE_CHAR
|
||
# ifdef QUAD
|
||
# define strtol_l wcstoull_l
|
||
# define __isoc23_strtol_l __isoc23_wcstoull_l
|
||
# else
|
||
# define strtol_l wcstoul_l
|
||
# define __isoc23_strtol_l __isoc23_wcstoul_l
|
||
# endif
|
||
# else
|
||
# ifdef QUAD
|
||
# define strtol_l strtoull_l
|
||
# define __isoc23_strtol_l __isoc23_strtoull_l
|
||
# else
|
||
# define strtol_l strtoul_l
|
||
# define __isoc23_strtol_l __isoc23_strtoul_l
|
||
# endif
|
||
# endif
|
||
#else
|
||
# ifdef USE_WIDE_CHAR
|
||
# ifdef QUAD
|
||
# define strtol_l wcstoll_l
|
||
# define __isoc23_strtol_l __isoc23_wcstoll_l
|
||
# else
|
||
# define strtol_l wcstol_l
|
||
# define __isoc23_strtol_l __isoc23_wcstol_l
|
||
# endif
|
||
# else
|
||
# ifdef QUAD
|
||
# define strtol_l strtoll_l
|
||
# define __isoc23_strtol_l __isoc23_strtoll_l
|
||
# else
|
||
# define strtol_l strtol_l
|
||
# define __isoc23_strtol_l __isoc23_strtol_l
|
||
# endif
|
||
# endif
|
||
#endif
|
||
|
||
#define __strtol_l __strtol_l2(strtol_l)
|
||
#define __strtol_l2(name) __strtol_l3(name)
|
||
#define __strtol_l3(name) __##name
|
||
|
||
|
||
/* 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
|
||
#else
|
||
# define LONG long
|
||
|
||
# ifndef ULONG_MAX
|
||
# define ULONG_MAX ((unsigned long int) ~(unsigned long int) 0)
|
||
# endif
|
||
# ifndef LONG_MAX
|
||
# define LONG_MAX ((long int) (ULONG_MAX >> 1))
|
||
# endif
|
||
# define STRTOL_LONG_MIN LONG_MIN
|
||
# define STRTOL_LONG_MAX LONG_MAX
|
||
# define STRTOL_ULONG_MAX ULONG_MAX
|
||
#endif
|
||
|
||
|
||
/* We use this code 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 and
|
||
_NL_CURRENT_WORD macros. */
|
||
#undef _NL_CURRENT
|
||
#define _NL_CURRENT(category, item) \
|
||
(current->values[_NL_ITEM_INDEX (item)].string)
|
||
#undef _NL_CURRENT_WORD
|
||
#define _NL_CURRENT_WORD(category, item) \
|
||
((uint32_t) current->values[_NL_ITEM_INDEX (item)].word)
|
||
|
||
#if defined _LIBC || defined HAVE_WCHAR_H
|
||
# include <wchar.h>
|
||
#endif
|
||
|
||
#ifdef USE_WIDE_CHAR
|
||
# include <wctype.h>
|
||
# define L_(Ch) L##Ch
|
||
# define UCHAR_TYPE wint_t
|
||
# define STRING_TYPE wchar_t
|
||
# define ISSPACE(Ch) __iswspace_l ((Ch), loc)
|
||
# define ISALPHA(Ch) __iswalpha_l ((Ch), _nl_C_locobj_ptr)
|
||
# define TOUPPER(Ch) __towupper_l ((Ch), _nl_C_locobj_ptr)
|
||
#else
|
||
# if defined _LIBC \
|
||
|| defined STDC_HEADERS || (!defined isascii && !defined HAVE_ISASCII)
|
||
# define IN_CTYPE_DOMAIN(c) 1
|
||
# else
|
||
# define IN_CTYPE_DOMAIN(c) isascii(c)
|
||
# endif
|
||
# define L_(Ch) Ch
|
||
# define UCHAR_TYPE unsigned char
|
||
# define STRING_TYPE char
|
||
# define ISSPACE(Ch) __isspace_l ((Ch), loc)
|
||
# define ISALPHA(Ch) __isalpha_l ((Ch), _nl_C_locobj_ptr)
|
||
# define TOUPPER(Ch) __toupper_l ((Ch), _nl_C_locobj_ptr)
|
||
#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
|
||
|
||
|
||
/* Define tables of maximum values and remainders in order to detect
|
||
overflow. Do this at compile-time in order to avoid the runtime
|
||
overhead of the division. */
|
||
extern const unsigned long __strtol_ul_max_tab[] attribute_hidden;
|
||
extern const unsigned char __strtol_ul_rem_tab[] attribute_hidden;
|
||
#if defined(QUAD) && __WORDSIZE == 32
|
||
extern const unsigned long long __strtol_ull_max_tab[] attribute_hidden;
|
||
extern const unsigned char __strtol_ull_rem_tab[] attribute_hidden;
|
||
#endif
|
||
|
||
#define DEF(TYPE, NAME) \
|
||
const TYPE NAME[] attribute_hidden = \
|
||
{ \
|
||
F(2), F(3), F(4), F(5), F(6), F(7), F(8), F(9), F(10), \
|
||
F(11), F(12), F(13), F(14), F(15), F(16), F(17), F(18), F(19), F(20), \
|
||
F(21), F(22), F(23), F(24), F(25), F(26), F(27), F(28), F(29), F(30), \
|
||
F(31), F(32), F(33), F(34), F(35), F(36) \
|
||
}
|
||
|
||
#if !UNSIGNED && !defined (USE_WIDE_CHAR) && !defined (QUAD)
|
||
# define F(X) ULONG_MAX / X
|
||
DEF (unsigned long, __strtol_ul_max_tab);
|
||
# undef F
|
||
# define F(X) ULONG_MAX % X
|
||
DEF (unsigned char, __strtol_ul_rem_tab);
|
||
# undef F
|
||
#endif
|
||
#if !UNSIGNED && !defined (USE_WIDE_CHAR) && defined (QUAD) \
|
||
&& __WORDSIZE == 32
|
||
# define F(X) ULONG_LONG_MAX / X
|
||
DEF (unsigned long long, __strtol_ull_max_tab);
|
||
# undef F
|
||
# define F(X) ULONG_LONG_MAX % X
|
||
DEF (unsigned char, __strtol_ull_rem_tab);
|
||
# undef F
|
||
#endif
|
||
#undef DEF
|
||
|
||
/* Define some more readable aliases for these arrays which correspond
|
||
to how they'll be used in the function below. */
|
||
#define jmax_tab __strtol_ul_max_tab
|
||
#if defined(QUAD) && __WORDSIZE == 32
|
||
# define cutoff_tab __strtol_ull_max_tab
|
||
# define cutlim_tab __strtol_ull_rem_tab
|
||
#else
|
||
# define cutoff_tab __strtol_ul_max_tab
|
||
# define cutlim_tab __strtol_ul_rem_tab
|
||
#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 BIN_CST is true, binary constants starting "0b" or "0B" are accepted
|
||
in base 0 and 2.
|
||
If ENDPTR is not NULL, a pointer to the character after the last
|
||
one converted is stored in *ENDPTR. */
|
||
|
||
INT
|
||
INTERNAL (__strtol_l) (const STRING_TYPE *nptr, STRING_TYPE **endptr,
|
||
int base, int group, bool bin_cst, locale_t loc)
|
||
{
|
||
int negative;
|
||
unsigned LONG int cutoff;
|
||
unsigned int cutlim;
|
||
unsigned LONG int i;
|
||
const STRING_TYPE *s;
|
||
UCHAR_TYPE c;
|
||
const STRING_TYPE *save, *end;
|
||
int overflow;
|
||
#ifndef USE_WIDE_CHAR
|
||
size_t cnt;
|
||
#endif
|
||
|
||
#ifdef USE_NUMBER_GROUPING
|
||
struct __locale_data *current = loc->__locales[LC_NUMERIC];
|
||
/* The thousands character of the current locale. */
|
||
# ifdef USE_WIDE_CHAR
|
||
wchar_t thousands = L'\0';
|
||
# else
|
||
const char *thousands = NULL;
|
||
size_t thousands_len = 0;
|
||
# endif
|
||
/* The numeric grouping specification of the current locale,
|
||
in the format described in <locale.h>. */
|
||
const char *grouping;
|
||
|
||
if (__glibc_unlikely (group))
|
||
{
|
||
grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
|
||
if (*grouping <= 0 || *grouping == CHAR_MAX)
|
||
grouping = NULL;
|
||
else
|
||
{
|
||
/* Figure out the thousands separator character. */
|
||
# ifdef USE_WIDE_CHAR
|
||
# ifdef _LIBC
|
||
thousands = _NL_CURRENT_WORD (LC_NUMERIC,
|
||
_NL_NUMERIC_THOUSANDS_SEP_WC);
|
||
# endif
|
||
if (thousands == L'\0')
|
||
grouping = NULL;
|
||
# else
|
||
# ifdef _LIBC
|
||
thousands = _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
|
||
# endif
|
||
if (*thousands == '\0')
|
||
{
|
||
thousands = NULL;
|
||
grouping = NULL;
|
||
}
|
||
# endif
|
||
}
|
||
}
|
||
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 (__glibc_unlikely (*s == L_('\0')))
|
||
goto noconv;
|
||
|
||
/* Check for a sign. */
|
||
negative = 0;
|
||
if (*s == L_('-'))
|
||
{
|
||
negative = 1;
|
||
++s;
|
||
}
|
||
else if (*s == L_('+'))
|
||
++s;
|
||
|
||
/* 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 (bin_cst && (base == 0 || base == 2) && TOUPPER (s[1]) == L_('B'))
|
||
{
|
||
s += 2;
|
||
base = 2;
|
||
}
|
||
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 (base != 10)
|
||
grouping = NULL;
|
||
|
||
if (__glibc_unlikely (grouping != NULL))
|
||
{
|
||
# ifndef USE_WIDE_CHAR
|
||
thousands_len = strlen (thousands);
|
||
# endif
|
||
|
||
/* Find the end of the digit string and check its grouping. */
|
||
end = s;
|
||
if (
|
||
# ifdef USE_WIDE_CHAR
|
||
*s != thousands
|
||
# else
|
||
({ for (cnt = 0; cnt < thousands_len; ++cnt)
|
||
if (thousands[cnt] != end[cnt])
|
||
break;
|
||
cnt < thousands_len; })
|
||
# endif
|
||
)
|
||
{
|
||
for (c = *end; c != L_('\0'); c = *++end)
|
||
if (((STRING_TYPE) c < L_('0') || (STRING_TYPE) c > L_('9'))
|
||
# ifdef USE_WIDE_CHAR
|
||
&& (wchar_t) c != thousands
|
||
# else
|
||
&& ({ for (cnt = 0; cnt < thousands_len; ++cnt)
|
||
if (thousands[cnt] != end[cnt])
|
||
break;
|
||
cnt < thousands_len; })
|
||
# endif
|
||
&& (!ISALPHA (c)
|
||
|| (int) (TOUPPER (c) - L_('A') + 10) >= base))
|
||
break;
|
||
|
||
# ifdef USE_WIDE_CHAR
|
||
end = __correctly_grouped_prefixwc (s, end, thousands, grouping);
|
||
# else
|
||
end = __correctly_grouped_prefixmb (s, end, thousands, grouping);
|
||
# endif
|
||
}
|
||
}
|
||
else
|
||
#endif
|
||
end = NULL;
|
||
|
||
/* Avoid runtime division; lookup cutoff and limit. */
|
||
cutoff = cutoff_tab[base - 2];
|
||
cutlim = cutlim_tab[base - 2];
|
||
|
||
overflow = 0;
|
||
i = 0;
|
||
c = *s;
|
||
if (sizeof (long int) != sizeof (LONG int))
|
||
{
|
||
unsigned long int j = 0;
|
||
unsigned long int jmax = jmax_tab[base - 2];
|
||
|
||
for (;c != L_('\0'); c = *++s)
|
||
{
|
||
if (s == end)
|
||
break;
|
||
if (c >= L_('0') && c <= L_('9'))
|
||
c -= L_('0');
|
||
#ifdef USE_NUMBER_GROUPING
|
||
# ifdef USE_WIDE_CHAR
|
||
else if (grouping && (wchar_t) c == thousands)
|
||
continue;
|
||
# else
|
||
else if (thousands_len)
|
||
{
|
||
for (cnt = 0; cnt < thousands_len; ++cnt)
|
||
if (thousands[cnt] != s[cnt])
|
||
break;
|
||
if (cnt == thousands_len)
|
||
{
|
||
s += thousands_len - 1;
|
||
continue;
|
||
}
|
||
if (ISALPHA (c))
|
||
c = TOUPPER (c) - L_('A') + 10;
|
||
else
|
||
break;
|
||
}
|
||
# endif
|
||
#endif
|
||
else if (ISALPHA (c))
|
||
c = TOUPPER (c) - L_('A') + 10;
|
||
else
|
||
break;
|
||
if ((int) c >= base)
|
||
break;
|
||
/* Note that we never can have an overflow. */
|
||
else if (j >= jmax)
|
||
{
|
||
/* We have an overflow. Now use the long representation. */
|
||
i = (unsigned LONG int) j;
|
||
goto use_long;
|
||
}
|
||
else
|
||
j = j * (unsigned long int) base + c;
|
||
}
|
||
|
||
i = (unsigned LONG int) j;
|
||
}
|
||
else
|
||
for (;c != L_('\0'); c = *++s)
|
||
{
|
||
if (s == end)
|
||
break;
|
||
if (c >= L_('0') && c <= L_('9'))
|
||
c -= L_('0');
|
||
#ifdef USE_NUMBER_GROUPING
|
||
# ifdef USE_WIDE_CHAR
|
||
else if (grouping && (wchar_t) c == thousands)
|
||
continue;
|
||
# else
|
||
else if (thousands_len)
|
||
{
|
||
for (cnt = 0; cnt < thousands_len; ++cnt)
|
||
if (thousands[cnt] != s[cnt])
|
||
break;
|
||
if (cnt == thousands_len)
|
||
{
|
||
s += thousands_len - 1;
|
||
continue;
|
||
}
|
||
if (ISALPHA (c))
|
||
c = TOUPPER (c) - L_('A') + 10;
|
||
else
|
||
break;
|
||
}
|
||
# endif
|
||
#endif
|
||
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
|
||
{
|
||
use_long:
|
||
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 (__glibc_unlikely (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. Likewise when the base is 0 or 2 and the
|
||
first two characters are '0' and 'b', but the rest are no binary
|
||
digits. This is no error case. We return 0 and ENDPTR points to
|
||
the 'x' or 'b'. */
|
||
if (endptr != NULL)
|
||
{
|
||
if (save - nptr >= 2
|
||
&& (TOUPPER (save[-1]) == L_('X')
|
||
|| (bin_cst && TOUPPER (save[-1]) == L_('B')))
|
||
&& save[-2] == L_('0'))
|
||
*endptr = (STRING_TYPE *) &save[-1];
|
||
else
|
||
/* There was no number to convert. */
|
||
*endptr = (STRING_TYPE *) nptr;
|
||
}
|
||
|
||
return 0L;
|
||
}
|
||
#if defined _LIBC && !defined USE_WIDE_CHAR
|
||
libc_hidden_def (INTERNAL (__strtol_l))
|
||
#endif
|
||
|
||
/* External user entry point. */
|
||
|
||
#if _LIBC - 0 == 0
|
||
|
||
/* Prototype. */
|
||
extern INT __strtol_l (const STRING_TYPE *nptr, STRING_TYPE **endptr,
|
||
int base);
|
||
#endif
|
||
|
||
|
||
INT
|
||
#ifdef weak_function
|
||
weak_function
|
||
#endif
|
||
__strtol_l (const STRING_TYPE *nptr, STRING_TYPE **endptr,
|
||
int base, locale_t loc)
|
||
{
|
||
return INTERNAL (__strtol_l) (nptr, endptr, base, 0, false, loc);
|
||
}
|
||
libc_hidden_def (__strtol_l)
|
||
weak_alias (__strtol_l, strtol_l)
|
||
|
||
INT
|
||
__isoc23_strtol_l (const STRING_TYPE *nptr, STRING_TYPE **endptr,
|
||
int base, locale_t loc)
|
||
{
|
||
return INTERNAL (__strtol_l) (nptr, endptr, base, 0, true, loc);
|
||
}
|
||
libc_hidden_def (__isoc23_strtol_l)
|