X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fstrtol.c;h=6c15d11e8f8d4047698f40d394cb2827a81f3b0c;hb=472322ae1a1ca95df1cc9b80031348e04fc5b6bc;hp=99840833dc744d4505eece4a84292f5b258ba448;hpb=a98b13cce01bc36e166a261a97c53a432768b2a7;p=gnulib.git diff --git a/lib/strtol.c b/lib/strtol.c index 99840833d..6c15d11e8 100644 --- a/lib/strtol.c +++ b/lib/strtol.c @@ -1,11 +1,14 @@ -/* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc. +/* Convert string representation of a number into an integer value. - NOTE: The canonical source of this file is maintained with the GNU C Library. - Bugs can be reported to bug-glibc@prep.ai.mit.edu. + Copyright (C) 1991-1992, 1994-1999, 2003, 2005-2007, 2009-2011 Free Software + Foundation, Inc. - This program is free software; you can redistribute it and/or modify it + 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 + Free Software Foundation; either version 3 of the License, or any later version. This program is distributed in the hope that it will be useful, @@ -14,90 +17,216 @@ 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#ifdef HAVE_CONFIG_H -# include -#endif + along with this program. If not, see . */ #ifdef _LIBC # define USE_NUMBER_GROUPING -# define STDC_HEADERS -# define HAVE_LIMITS_H +#else +# include #endif #include #include -#ifndef errno -extern int errno; +#ifndef __set_errno +# define __set_errno(Val) errno = (Val) #endif -#if HAVE_LIMITS_H -# include -#endif - -#ifdef STDC_HEADERS -# include -# include -#else -# ifndef NULL -# define NULL 0 -# endif -#endif +#include +#include +#include +#include #ifdef USE_NUMBER_GROUPING # include "../locale/localeinfo.h" #endif -/* Nonzero if we are defining `strtoul' or `strtouq', operating on +/* Nonzero if we are defining `strtoul' or `strtoull', operating on unsigned integers. */ #ifndef UNSIGNED # define UNSIGNED 0 # define INT LONG int #else -# define strtol strtoul # define INT unsigned LONG int #endif -/* If QUAD is defined, we are defining `strtoq' or `strtouq', - operating on `long long int's. */ -#ifdef QUAD +/* Determine the name. */ +#ifdef USE_IN_EXTENDED_LOCALE_MODEL # if UNSIGNED -# define strtoul strtouq +# 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 -# define strtol strtoq +# 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 -# 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 +# define STRTOL_LONG_MIN LLONG_MIN +# define STRTOL_LONG_MAX LLONG_MAX +# define STRTOL_ULONG_MAX ULLONG_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 \ + : ~ TYPE_MAXIMUM (t))) +# define TYPE_MAXIMUM(t) \ + ((t) (! TYPE_SIGNED (t) \ + ? (t) -1 \ + : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1))) + +# ifndef ULLONG_MAX +# define ULLONG_MAX TYPE_MAXIMUM (unsigned long long) +# endif +# ifndef LLONG_MAX +# define LLONG_MAX TYPE_MAXIMUM (long long int) +# endif +# ifndef LLONG_MIN +# define LLONG_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 ULONG_MAX -# define ULONG_MAX maxquad + static const unsigned long long int maxquad = ULLONG_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 -#ifdef __STDC__ -# define INTERNAL(x) INTERNAL1(x) -# define INTERNAL1(x) __##x##_internal + +/* 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 + +#ifdef USE_WIDE_CHAR +# include +# include +# 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 INTERNAL(x) __/**/x/**/_internal +# 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. @@ -106,24 +235,24 @@ extern int errno; one converted is stored in *ENDPTR. */ INT -INTERNAL (strtol) (nptr, endptr, base, group) - const char *nptr; - char **endptr; - int base; - int group; +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 char *s; - register unsigned char c; - const char *save, *end; + 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; + wchar_t thousands = L'\0'; /* The numeric grouping specification of the current locale, in the format described in . */ const char *grouping; @@ -132,39 +261,44 @@ INTERNAL (strtol) (nptr, endptr, base, group) { grouping = _NL_CURRENT (LC_NUMERIC, GROUPING); if (*grouping <= 0 || *grouping == CHAR_MAX) - grouping = NULL; + 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; - } + { + /* 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) - base = 10; + { + __set_errno (EINVAL); + return 0; + } - s = nptr; + save = s = nptr; /* Skip white space. */ - while (isspace (*s)) + while (ISSPACE (*s)) ++s; - if (*s == '\0') + if (*s == L_('\0')) goto noconv; /* Check for a sign. */ - if (*s == '-') + if (*s == L_('-')) { negative = 1; ++s; } - else if (*s == '+') + else if (*s == L_('+')) { negative = 0; ++s; @@ -172,23 +306,19 @@ INTERNAL (strtol) (nptr, endptr, base, group) else negative = 0; - if (base == 16 && s[0] == '0' && toupper (s[1]) == 'X') - s += 2; - - /* If BASE is zero, figure it out ourselves. */ - if (base == 0) - if (*s == '0') - { - if (toupper (s[1]) == 'X') - { - s += 2; - base = 16; - } - else - base = 8; - } - else - base = 10; + /* 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; @@ -198,44 +328,45 @@ INTERNAL (strtol) (nptr, endptr, base, group) { /* Find the end of the digit string and check its grouping. */ end = s; - for (c = *end; c != '\0'; c = *++end) - if (c != thousands && !isdigit (c) && - (!isalpha (c) || toupper (c) - 'A' + 10 >= base)) - break; + 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; + end = s; else - end = correctly_grouped_prefix (s, end, thousands, grouping); + 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; + cutoff = STRTOL_ULONG_MAX / (unsigned LONG int) base; + cutlim = STRTOL_ULONG_MAX % (unsigned LONG int) base; overflow = 0; i = 0; - for (c = *s; c != '\0'; c = *++s) + for (c = *s; c != L_('\0'); c = *++s) { if (s == end) - break; - if (isdigit (c)) - c -= '0'; - else if (isalpha (c)) - c = toupper (c) - 'A' + 10; + break; + if (c >= L_('0') && c <= L_('9')) + c -= L_('0'); + else if (ISALPHA (c)) + c = TOUPPER (c) - L_('A') + 10; else - break; - if (c >= base) - break; + break; + if ((int) c >= base) + break; /* Check for overflow. */ if (i > cutoff || (i == cutoff && c > cutlim)) - overflow = 1; + overflow = 1; else - { - i *= (unsigned LONG int) base; - i += c; - } + { + i *= (unsigned LONG int) base; + i += c; + } } /* Check if anything actually happened. */ @@ -245,47 +376,58 @@ INTERNAL (strtol) (nptr, endptr, base, group) /* Store in ENDPTR the address of one character past the last character we converted. */ if (endptr != NULL) - *endptr = (char *) s; + *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 (i > (negative ? - -(unsigned LONG int) LONG_MIN : (unsigned LONG int) LONG_MAX)) + if (overflow == 0 + && i > (negative + ? -((unsigned LONG int) (STRTOL_LONG_MIN + 1)) + 1 + : (unsigned LONG int) STRTOL_LONG_MAX)) overflow = 1; #endif if (overflow) { - errno = ERANGE; + __set_errno (ERANGE); #if UNSIGNED - return ULONG_MAX; + return STRTOL_ULONG_MAX; #else - return negative ? LONG_MIN : LONG_MAX; + return negative ? STRTOL_LONG_MIN : STRTOL_LONG_MAX; #endif } /* Return the result of the appropriate sign. */ - return (negative ? -i : i); + return negative ? -i : i; noconv: - /* There was no number to convert. */ + /* 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) - *endptr = (char *) nptr; + { + 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. */ -#ifdef weak_symbol -weak_symbol (strtol) -#endif INT -strtol (nptr, endptr, base) - const char *nptr; - char **endptr; - int base; +#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); + return INTERNAL (strtol) (nptr, endptr, base, 0 LOCALE_PARAM); }