1 /* Convert string representation of a number into an integer value.
3 Copyright (C) 1991-1992, 1994-1999, 2003, 2005-2007, 2009-2017 Free Software
6 NOTE: The canonical source of this file is maintained with the GNU C
7 Library. Bugs can be reported to bug-glibc@gnu.org.
9 This program is free software: you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 3 of the License, or any
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 # define USE_NUMBER_GROUPING
31 # define __set_errno(Val) errno = (Val)
39 #ifdef USE_NUMBER_GROUPING
40 # include "../locale/localeinfo.h"
43 /* Nonzero if we are defining 'strtoul' or 'strtoull', operating on
49 # define INT unsigned LONG int
52 /* Determine the name. */
53 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
57 # define strtol __wcstoull_l
59 # define strtol __wcstoul_l
63 # define strtol __strtoull_l
65 # define strtol __strtoul_l
71 # define strtol __wcstoll_l
73 # define strtol __wcstol_l
77 # define strtol __strtoll_l
79 # define strtol __strtol_l
87 # define strtol wcstoull
89 # define strtol wcstoul
93 # define strtol strtoull
95 # define strtol strtoul
101 # define strtol wcstoll
103 # define strtol wcstol
107 # define strtol strtoll
113 /* If QUAD is defined, we are defining 'strtoll' or 'strtoull',
114 operating on 'long long int's. */
116 # define LONG long long
117 # define STRTOL_LONG_MIN LLONG_MIN
118 # define STRTOL_LONG_MAX LLONG_MAX
119 # define STRTOL_ULONG_MAX ULLONG_MAX
121 /* The extra casts in the following macros work around compiler bugs,
122 e.g., in Cray C 5.0.3.0. */
124 /* True if the arithmetic type T is signed. */
125 # define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
127 /* Minimum and maximum values for integer types.
128 These macros have undefined behavior for signed types that either
129 have padding bits or do not use two's complement. If this is a
130 problem for you, please let us know how to fix it for your host. */
132 /* The maximum and minimum values for the integer type T. */
133 # define TYPE_MINIMUM(t) ((t) ~ TYPE_MAXIMUM (t))
134 # define TYPE_MAXIMUM(t) \
135 ((t) (! TYPE_SIGNED (t) \
137 : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
140 # define ULLONG_MAX TYPE_MAXIMUM (unsigned long long)
143 # define LLONG_MAX TYPE_MAXIMUM (long long int)
146 # define LLONG_MIN TYPE_MINIMUM (long long int)
149 # if __GNUC__ == 2 && __GNUC_MINOR__ < 7
150 /* Work around gcc bug with using this constant. */
151 static const unsigned long long int maxquad
= ULLONG_MAX
;
152 # undef STRTOL_ULONG_MAX
153 # define STRTOL_ULONG_MAX maxquad
157 # define STRTOL_LONG_MIN LONG_MIN
158 # define STRTOL_LONG_MAX LONG_MAX
159 # define STRTOL_ULONG_MAX ULONG_MAX
163 /* We use this code also for the extended locale handling where the
164 function gets as an additional argument the locale which has to be
165 used. To access the values we have to redefine the _NL_CURRENT
167 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
169 # define _NL_CURRENT(category, item) \
170 (current->values[_NL_ITEM_INDEX (item)].string)
171 # define LOCALE_PARAM , loc
172 # define LOCALE_PARAM_PROTO , __locale_t loc
174 # define LOCALE_PARAM
175 # define LOCALE_PARAM_PROTO
181 # define L_(Ch) L##Ch
182 # define UCHAR_TYPE wint_t
183 # define STRING_TYPE wchar_t
184 # ifdef USE_IN_EXTENDED_LOCALE_MODEL
185 # define ISSPACE(Ch) __iswspace_l ((Ch), loc)
186 # define ISALPHA(Ch) __iswalpha_l ((Ch), loc)
187 # define TOUPPER(Ch) __towupper_l ((Ch), loc)
189 # define ISSPACE(Ch) iswspace (Ch)
190 # define ISALPHA(Ch) iswalpha (Ch)
191 # define TOUPPER(Ch) towupper (Ch)
195 # define UCHAR_TYPE unsigned char
196 # define STRING_TYPE char
197 # ifdef USE_IN_EXTENDED_LOCALE_MODEL
198 # define ISSPACE(Ch) __isspace_l ((Ch), loc)
199 # define ISALPHA(Ch) __isalpha_l ((Ch), loc)
200 # define TOUPPER(Ch) __toupper_l ((Ch), loc)
202 # define ISSPACE(Ch) isspace (Ch)
203 # define ISALPHA(Ch) isalpha (Ch)
204 # define TOUPPER(Ch) toupper (Ch)
208 #define INTERNAL(X) INTERNAL1(X)
209 #define INTERNAL1(X) __##X##_internal
210 #define WEAKNAME(X) WEAKNAME1(X)
212 #ifdef USE_NUMBER_GROUPING
213 /* This file defines a function to check for correct grouping. */
214 # include "grouping.h"
219 /* Convert NPTR to an 'unsigned long int' or 'long int' in base BASE.
220 If BASE is 0 the base is determined by the presence of a leading
221 zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
222 If BASE is < 2 or > 36, it is reset to 10.
223 If ENDPTR is not NULL, a pointer to the character after the last
224 one converted is stored in *ENDPTR. */
227 INTERNAL (strtol
) (const STRING_TYPE
*nptr
, STRING_TYPE
**endptr
,
228 int base
, int group LOCALE_PARAM_PROTO
)
231 register unsigned LONG
int cutoff
;
232 register unsigned int cutlim
;
233 register unsigned LONG
int i
;
234 register const STRING_TYPE
*s
;
235 register UCHAR_TYPE c
;
236 const STRING_TYPE
*save
, *end
;
239 #ifdef USE_NUMBER_GROUPING
240 # ifdef USE_IN_EXTENDED_LOCALE_MODEL
241 struct locale_data
*current
= loc
->__locales
[LC_NUMERIC
];
243 /* The thousands character of the current locale. */
244 wchar_t thousands
= L
'\0';
245 /* The numeric grouping specification of the current locale,
246 in the format described in <locale.h>. */
247 const char *grouping
;
251 grouping
= _NL_CURRENT (LC_NUMERIC
, GROUPING
);
252 if (*grouping
<= 0 || *grouping
== CHAR_MAX
)
256 /* Figure out the thousands separator character. */
257 # if defined _LIBC || defined _HAVE_BTOWC
258 thousands
= __btowc (*_NL_CURRENT (LC_NUMERIC
, THOUSANDS_SEP
));
259 if (thousands
== WEOF
)
262 if (thousands
== L
'\0')
270 if (base
< 0 || base
== 1 || base
> 36)
272 __set_errno (EINVAL
);
278 /* Skip white space. */
284 /* Check for a sign. */
290 else if (*s
== L_('+'))
298 /* Recognize number prefix and if BASE is zero, figure it out ourselves. */
301 if ((base
== 0 || base
== 16) && TOUPPER (s
[1]) == L_('X'))
312 /* Save the pointer so we can check later if anything happened. */
315 #ifdef USE_NUMBER_GROUPING
318 /* Find the end of the digit string and check its grouping. */
320 for (c
= *end
; c
!= L_('\0'); c
= *++end
)
321 if ((wchar_t) c
!= thousands
322 && ((wchar_t) c
< L_('0') || (wchar_t) c
> L_('9'))
323 && (!ISALPHA (c
) || (int) (TOUPPER (c
) - L_('A') + 10) >= base
))
328 end
= correctly_grouped_prefix (s
, end
, thousands
, grouping
);
334 cutoff
= STRTOL_ULONG_MAX
/ (unsigned LONG
int) base
;
335 cutlim
= STRTOL_ULONG_MAX
% (unsigned LONG
int) base
;
339 for (c
= *s
; c
!= L_('\0'); c
= *++s
)
343 if (c
>= L_('0') && c
<= L_('9'))
345 else if (ISALPHA (c
))
346 c
= TOUPPER (c
) - L_('A') + 10;
351 /* Check for overflow. */
352 if (i
> cutoff
|| (i
== cutoff
&& c
> cutlim
))
356 i
*= (unsigned LONG
int) base
;
361 /* Check if anything actually happened. */
365 /* Store in ENDPTR the address of one character
366 past the last character we converted. */
368 *endptr
= (STRING_TYPE
*) s
;
371 /* Check for a value that is within the range of
372 'unsigned LONG int', but outside the range of 'LONG int'. */
375 ? -((unsigned LONG
int) (STRTOL_LONG_MIN
+ 1)) + 1
376 : (unsigned LONG
int) STRTOL_LONG_MAX
))
382 __set_errno (ERANGE
);
384 return STRTOL_ULONG_MAX
;
386 return negative
? STRTOL_LONG_MIN
: STRTOL_LONG_MAX
;
390 /* Return the result of the appropriate sign. */
391 return negative
? -i
: i
;
394 /* We must handle a special case here: the base is 0 or 16 and the
395 first two characters are '0' and 'x', but the rest are no
396 hexadecimal digits. This is no error case. We return 0 and
397 ENDPTR points to the 'x'. */
400 if (save
- nptr
>= 2 && TOUPPER (save
[-1]) == L_('X')
401 && save
[-2] == L_('0'))
402 *endptr
= (STRING_TYPE
*) &save
[-1];
404 /* There was no number to convert. */
405 *endptr
= (STRING_TYPE
*) nptr
;
411 /* External user entry point. */
418 strtol (const STRING_TYPE
*nptr
, STRING_TYPE
**endptr
,
419 int base LOCALE_PARAM_PROTO
)
421 return INTERNAL (strtol
) (nptr
, endptr
, base
, 0 LOCALE_PARAM
);