| /* 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); |
| } |