566 lines
13 KiB
C
566 lines
13 KiB
C
/* Convert string representation of a number into an integer value.
|
||
Copyright (C) 1991,92,94,95,96,97,98,99,2000 Free Software Foundation, Inc.
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||
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,
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||
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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||
|
||
#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#ifdef _LIBC
|
||
# define USE_NUMBER_GROUPING
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||
# define STDC_HEADERS
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||
# define HAVE_LIMITS_H
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#endif
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||
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#include <ctype.h>
|
||
#include <errno.h>
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||
#ifndef errno
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||
extern int errno;
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||
#endif
|
||
#ifndef __set_errno
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# define __set_errno(Val) errno = (Val)
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||
#endif
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||
|
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#ifdef HAVE_LIMITS_H
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# include <limits.h>
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#endif
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#ifdef STDC_HEADERS
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# include <stddef.h>
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# include <stdlib.h>
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# include <string.h>
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#else
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# ifndef NULL
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||
# define NULL 0
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||
# endif
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||
#endif
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||
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||
#ifdef USE_NUMBER_GROUPING
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||
# include "../locale/localeinfo.h"
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#endif
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/* Nonzero if we are defining `strtoul' or `strtoull', operating on
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unsigned integers. */
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#ifndef UNSIGNED
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# define UNSIGNED 0
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||
# define INT LONG int
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||
#else
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# define INT unsigned LONG int
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||
#endif
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||
|
||
/* Determine the name. */
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||
#ifdef USE_IN_EXTENDED_LOCALE_MODEL
|
||
# if UNSIGNED
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||
# ifdef USE_WIDE_CHAR
|
||
# ifdef QUAD
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||
# define strtol __wcstoull_l
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# else
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# define strtol __wcstoul_l
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# endif
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# else
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# ifdef QUAD
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# define strtol __strtoull_l
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||
# else
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# define strtol __strtoul_l
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# endif
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# endif
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||
# else
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||
# ifdef USE_WIDE_CHAR
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||
# ifdef QUAD
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# define strtol __wcstoll_l
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# else
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# define strtol __wcstol_l
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||
# endif
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||
# else
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# ifdef QUAD
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# define strtol __strtoll_l
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# else
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# define strtol __strtol_l
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# endif
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# endif
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# endif
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#else
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||
# if UNSIGNED
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||
# ifdef USE_WIDE_CHAR
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# ifdef QUAD
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# define strtol wcstoull
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# else
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# define strtol wcstoul
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# endif
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# else
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# ifdef QUAD
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||
# define strtol strtoull
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# else
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# define strtol strtoul
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# endif
|
||
# endif
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||
# else
|
||
# ifdef USE_WIDE_CHAR
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# ifdef QUAD
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||
# define strtol wcstoll
|
||
# else
|
||
# define strtol wcstol
|
||
# endif
|
||
# else
|
||
# ifdef QUAD
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||
# define strtol strtoll
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||
# endif
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# endif
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||
# endif
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||
#endif
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||
|
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/* If QUAD is defined, we are defining `strtoll' or `strtoull',
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operating on `long long int's. */
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#ifdef QUAD
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# define LONG long long
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# define STRTOL_LONG_MIN LONG_LONG_MIN
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# define STRTOL_LONG_MAX LONG_LONG_MAX
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# define STRTOL_ULONG_MAX ULONG_LONG_MAX
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# if __GNUC__ == 2 && __GNUC_MINOR__ < 7
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/* Work around gcc bug with using this constant. */
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static const unsigned long long int maxquad = ULONG_LONG_MAX;
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# undef STRTOL_ULONG_MAX
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# define STRTOL_ULONG_MAX maxquad
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||
# endif
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||
#else
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# define LONG long
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||
|
||
# ifndef ULONG_MAX
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||
# define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
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# endif
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# ifndef LONG_MAX
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# define LONG_MAX ((long int) (ULONG_MAX >> 1))
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# endif
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# define STRTOL_LONG_MIN LONG_MIN
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# define STRTOL_LONG_MAX LONG_MAX
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||
# define STRTOL_ULONG_MAX ULONG_MAX
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#endif
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||
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||
|
||
/* We use this code also for the extended locale handling where the
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||
function gets as an additional argument the locale which has to be
|
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used. To access the values we have to redefine the _NL_CURRENT
|
||
macro. */
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#ifdef USE_IN_EXTENDED_LOCALE_MODEL
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# undef _NL_CURRENT
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# define _NL_CURRENT(category, item) \
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(current->values[_NL_ITEM_INDEX (item)].string)
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# define LOCALE_PARAM , loc
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# define LOCALE_PARAM_DECL __locale_t loc;
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||
#else
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# define LOCALE_PARAM
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# define LOCALE_PARAM_DECL
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#endif
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#if defined _LIBC || defined HAVE_WCHAR_H
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# include <wchar.h>
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#endif
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||
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#ifdef USE_WIDE_CHAR
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||
# include <wctype.h>
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# define L_(Ch) L##Ch
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# define UCHAR_TYPE wint_t
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# define STRING_TYPE wchar_t
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# ifdef USE_IN_EXTENDED_LOCALE_MODEL
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# define ISSPACE(Ch) __iswspace_l ((Ch), loc)
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# define ISALPHA(Ch) __iswalpha_l ((Ch), loc)
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# define TOUPPER(Ch) __towupper_l ((Ch), loc)
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# else
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# define ISSPACE(Ch) iswspace (Ch)
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||
# define ISALPHA(Ch) iswalpha (Ch)
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||
# define TOUPPER(Ch) towupper (Ch)
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||
# endif
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||
# else
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||
# if defined STDC_HEADERS || (!defined isascii && !defined HAVE_ISASCII)
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# define IN_CTYPE_DOMAIN(c) 1
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# else
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# define IN_CTYPE_DOMAIN(c) isascii(c)
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# endif
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# define L_(Ch) Ch
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# define UCHAR_TYPE unsigned char
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||
# define STRING_TYPE char
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# ifdef USE_IN_EXTENDED_LOCALE_MODEL
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# define ISSPACE(Ch) __isspace_l ((Ch), loc)
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# define ISALPHA(Ch) __isalpha_l ((Ch), loc)
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# define TOUPPER(Ch) __toupper_l ((Ch), loc)
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# else
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# define ISSPACE(Ch) (IN_CTYPE_DOMAIN (Ch) && isspace (Ch))
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# define ISALPHA(Ch) (IN_CTYPE_DOMAIN (Ch) && isalpha (Ch))
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# define TOUPPER(Ch) (IN_CTYPE_DOMAIN (Ch) ? toupper (Ch) : (Ch))
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||
# endif
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||
#endif
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||
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||
#ifdef __STDC__
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||
# define INTERNAL(X) INTERNAL1(X)
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||
# define INTERNAL1(X) __##X##_internal
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||
# define WEAKNAME(X) WEAKNAME1(X)
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||
#else
|
||
# define INTERNAL(X) __/**/X/**/_internal
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||
#endif
|
||
|
||
#ifdef USE_NUMBER_GROUPING
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||
/* This file defines a function to check for correct grouping. */
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# include "grouping.h"
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#endif
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|
||
|
||
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/* Convert NPTR to an `unsigned long int' or `long int' in base BASE.
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If BASE is 0 the base is determined by the presence of a leading
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zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
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If BASE is < 2 or > 36, it is reset to 10.
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||
If ENDPTR is not NULL, a pointer to the character after the last
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one converted is stored in *ENDPTR. */
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INT
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INTERNAL (strtol) (nptr, endptr, base, group LOCALE_PARAM)
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const STRING_TYPE *nptr;
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STRING_TYPE **endptr;
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int base;
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int group;
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LOCALE_PARAM_DECL
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{
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int negative;
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register unsigned LONG int cutoff;
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register unsigned int cutlim;
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register unsigned LONG int i;
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register const STRING_TYPE *s;
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register UCHAR_TYPE c;
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const STRING_TYPE *save, *end;
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||
int overflow;
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||
#ifndef USE_WIDE_CHAR
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||
int cnt;
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||
#endif
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||
|
||
#ifdef USE_NUMBER_GROUPING
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||
# ifdef USE_IN_EXTENDED_LOCALE_MODEL
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struct locale_data *current = loc->__locales[LC_NUMERIC];
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||
# endif
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||
/* The thousands character of the current locale. */
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# ifdef USE_WIDE_CHAR
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wchar_t thousands = L'\0';
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# else
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const char *thousands = NULL;
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size_t thousands_len = 0;
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||
# endif
|
||
/* The numeric grouping specification of the current locale,
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in the format described in <locale.h>. */
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const char *grouping;
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||
|
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if (group)
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{
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||
grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
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if (*grouping <= 0 || *grouping == CHAR_MAX)
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grouping = NULL;
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else
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{
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||
/* Figure out the thousands separator character. */
|
||
# ifdef USE_WIDE_CHAR
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||
# ifdef _LIBC
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thousands = _NL_CURRENT_WORD (LC_NUMERIC,
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_NL_NUMERIC_THOUSANDS_SEP_WC);
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||
# endif
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if (thousands == L'\0')
|
||
grouping = NULL;
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# else
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||
# ifdef _LIBC
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||
thousands = _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
|
||
# endif
|
||
if (*thousands == '\0')
|
||
{
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||
thousands = NULL;
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||
grouping = NULL;
|
||
}
|
||
# endif
|
||
}
|
||
}
|
||
else
|
||
grouping = NULL;
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||
#endif
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||
|
||
if (base < 0 || base == 1 || base > 36)
|
||
{
|
||
__set_errno (EINVAL);
|
||
return 0;
|
||
}
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||
|
||
save = s = nptr;
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||
|
||
/* Skip white space. */
|
||
while (ISSPACE (*s))
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||
++s;
|
||
if (*s == L_('\0'))
|
||
goto noconv;
|
||
|
||
/* Check for a sign. */
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||
if (*s == L_('-'))
|
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{
|
||
negative = 1;
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||
++s;
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||
}
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||
else if (*s == L_('+'))
|
||
{
|
||
negative = 0;
|
||
++s;
|
||
}
|
||
else
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||
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;
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||
}
|
||
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 (grouping)
|
||
{
|
||
# 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 (((wchar_t) c < L_('0') || (wchar_t) c > L_('9'))
|
||
# ifdef USE_WIDE_CHAR
|
||
&& 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;
|
||
|
||
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;
|
||
c = *s;
|
||
if (sizeof (long int) != sizeof (LONG int))
|
||
{
|
||
unsigned long int j = 0;
|
||
unsigned long int jmax = ULONG_MAX / base;
|
||
|
||
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 && 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 && 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 (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. */
|
||
|
||
#if _LIBC - 0 == 0
|
||
# undef PARAMS
|
||
# if defined (__STDC__) && __STDC__
|
||
# define PARAMS(Args) Args
|
||
# else
|
||
# define PARAMS(Args) ()
|
||
# endif
|
||
|
||
/* Prototype. */
|
||
INT strtol PARAMS ((const STRING_TYPE *nptr, STRING_TYPE **endptr, int base));
|
||
#endif
|
||
|
||
|
||
INT
|
||
#ifdef weak_function
|
||
weak_function
|
||
#endif
|
||
strtol (nptr, endptr, base LOCALE_PARAM)
|
||
const STRING_TYPE *nptr;
|
||
STRING_TYPE **endptr;
|
||
int base;
|
||
LOCALE_PARAM_DECL
|
||
{
|
||
return INTERNAL (strtol) (nptr, endptr, base, 0 LOCALE_PARAM);
|
||
}
|