1 /* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
3 NOTE: The canonical source of this file is maintained with the GNU C Library.
4 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
25 # define USE_NUMBER_GROUPING
27 # define HAVE_LIMITS_H
49 #ifdef USE_NUMBER_GROUPING
50 # include "../locale/localeinfo.h"
53 /* Nonzero if we are defining `strtoul' or `strtouq', operating on
59 # define strtol strtoul
60 # define INT unsigned LONG int
63 /* If QUAD is defined, we are defining `strtoq' or `strtouq',
64 operating on `long long int's. */
67 # define strtoul strtouq
69 # define strtol strtoq
71 # define LONG long long
73 # define LONG_MIN LONG_LONG_MIN
75 # define LONG_MAX LONG_LONG_MAX
77 # define ULONG_MAX ULONG_LONG_MAX
78 # if __GNUC__ == 2 && __GNUC_MINOR__ < 7
79 /* Work around gcc bug with using this constant. */
80 static const unsigned long long int maxquad = ULONG_LONG_MAX;
82 # define ULONG_MAX maxquad
89 # define INTERNAL(x) INTERNAL1(x)
90 # define INTERNAL1(x) __##x##_internal
92 # define INTERNAL(x) __/**/x/**/_internal
95 #ifdef USE_NUMBER_GROUPING
96 /* This file defines a function to check for correct grouping. */
97 # include "grouping.h"
101 /* Convert NPTR to an `unsigned long int' or `long int' in base BASE.
102 If BASE is 0 the base is determined by the presence of a leading
103 zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
104 If BASE is < 2 or > 36, it is reset to 10.
105 If ENDPTR is not NULL, a pointer to the character after the last
106 one converted is stored in *ENDPTR. */
109 INTERNAL (strtol) (nptr, endptr, base, group)
116 register unsigned LONG int cutoff;
117 register unsigned int cutlim;
118 register unsigned LONG int i;
119 register const char *s;
120 register unsigned char c;
121 const char *save, *end;
124 #ifdef USE_NUMBER_GROUPING
125 /* The thousands character of the current locale. */
127 /* The numeric grouping specification of the current locale,
128 in the format described in <locale.h>. */
129 const char *grouping;
133 grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
134 if (*grouping <= 0 || *grouping == CHAR_MAX)
138 /* Figure out the thousands separator character. */
139 if (mbtowc (&thousands, _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
140 strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
141 thousands = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
142 if (thousands == L'\0')
150 if (base < 0 || base == 1 || base > 36)
155 /* Skip white space. */
161 /* Check for a sign. */
175 if (base == 16 && s[0] == '0' && toupper (s[1]) == 'X')
178 /* If BASE is zero, figure it out ourselves. */
182 if (toupper (s[1]) == 'X')
193 /* Save the pointer so we can check later if anything happened. */
196 #ifdef USE_NUMBER_GROUPING
199 /* Find the end of the digit string and check its grouping. */
201 for (c = *end; c != '\0'; c = *++end)
202 if (c != thousands && !isdigit (c) &&
203 (!isalpha (c) || toupper (c) - 'A' + 10 >= base))
208 end = correctly_grouped_prefix (s, end, thousands, grouping);
214 cutoff = ULONG_MAX / (unsigned LONG int) base;
215 cutlim = ULONG_MAX % (unsigned LONG int) base;
219 for (c = *s; c != '\0'; c = *++s)
225 else if (isalpha (c))
226 c = toupper (c) - 'A' + 10;
231 /* Check for overflow. */
232 if (i > cutoff || (i == cutoff && c > cutlim))
236 i *= (unsigned LONG int) base;
241 /* Check if anything actually happened. */
245 /* Store in ENDPTR the address of one character
246 past the last character we converted. */
248 *endptr = (char *) s;
251 /* Check for a value that is within the range of
252 `unsigned LONG int', but outside the range of `LONG int'. */
254 -(unsigned LONG int) LONG_MIN : (unsigned LONG int) LONG_MAX))
264 return negative ? LONG_MIN : LONG_MAX;
268 /* Return the result of the appropriate sign. */
269 return (negative ? -i : i);
272 /* There was no number to convert. */
274 *endptr = (char *) nptr;
278 /* External user entry point. */
285 strtol (nptr, endptr, base)
290 return INTERNAL (strtol) (nptr, endptr, base, 0);