1 /* Copyright (C) 1991, 1992, 1994, 1995 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
18 Cambridge, MA 02139, USA. */
21 # define USE_NUMBER_GROUPING
23 # define HAVE_LIMITS_H
41 #ifdef USE_NUMBER_GROUPING
42 # include "../locale/localeinfo.h"
45 /* Nonzero if we are defining `strtoul' or `strtouq', operating on
51 # define strtol strtoul
52 # define INT unsigned LONG int
55 /* If QUAD is defined, we are defining `strtoq' or `strtouq',
56 operating on `long long int's. */
59 # define strtoul strtouq
61 # define strtol strtoq
63 # define LONG long long
65 # define LONG_MIN LONG_LONG_MIN
67 # define LONG_MAX LONG_LONG_MAX
69 # define ULONG_MAX ULONG_LONG_MAX
70 # if __GNUC__ == 2 && __GNUC_MINOR__ < 7
71 /* Work around gcc bug with using this constant. */
72 static const unsigned long long int maxquad = ULONG_LONG_MAX;
74 # define ULONG_MAX maxquad
81 # define INTERNAL(x) INTERNAL1(x)
82 # define INTERNAL1(x) __##x##_internal
84 # define INTERNAL(x) __/**/x/**/_internal
87 #ifdef USE_NUMBER_GROUPING
88 /* This file defines a function to check for correct grouping. */
89 # include "grouping.h"
93 /* Convert NPTR to an `unsigned long int' or `long int' in base BASE.
94 If BASE is 0 the base is determined by the presence of a leading
95 zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
96 If BASE is < 2 or > 36, it is reset to 10.
97 If ENDPTR is not NULL, a pointer to the character after the last
98 one converted is stored in *ENDPTR. */
101 INTERNAL (strtol) (nptr, endptr, base, group)
108 register unsigned LONG int cutoff;
109 register unsigned int cutlim;
110 register unsigned LONG int i;
111 register const char *s;
112 register unsigned char c;
113 const char *save, *end;
116 #ifdef USE_NUMBER_GROUPING
117 /* The thousands character of the current locale. */
119 /* The numeric grouping specification of the current locale,
120 in the format described in <locale.h>. */
121 const char *grouping;
125 grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
126 if (*grouping <= 0 || *grouping == CHAR_MAX)
130 /* Figure out the thousands separator character. */
131 if (mbtowc (&thousands, _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
132 strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
133 thousands = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
134 if (thousands == L'\0')
142 if (base < 0 || base == 1 || base > 36)
147 /* Skip white space. */
153 /* Check for a sign. */
167 if (base == 16 && s[0] == '0' && toupper (s[1]) == 'X')
170 /* If BASE is zero, figure it out ourselves. */
174 if (toupper (s[1]) == 'X')
185 /* Save the pointer so we can check later if anything happened. */
188 #ifdef USE_NUMBER_GROUPING
191 /* Find the end of the digit string and check its grouping. */
193 for (c = *end; c != '\0'; c = *++end)
194 if (c != thousands && !isdigit (c) &&
195 (!isalpha (c) || toupper (c) - 'A' + 10 >= base))
200 end = correctly_grouped_prefix (s, end, thousands, grouping);
206 cutoff = ULONG_MAX / (unsigned LONG int) base;
207 cutlim = ULONG_MAX % (unsigned LONG int) base;
211 for (c = *s; c != '\0'; c = *++s)
217 else if (isalpha (c))
218 c = toupper (c) - 'A' + 10;
223 /* Check for overflow. */
224 if (i > cutoff || (i == cutoff && c > cutlim))
228 i *= (unsigned LONG int) base;
233 /* Check if anything actually happened. */
237 /* Store in ENDPTR the address of one character
238 past the last character we converted. */
240 *endptr = (char *) s;
243 /* Check for a value that is within the range of
244 `unsigned LONG int', but outside the range of `LONG int'. */
246 -(unsigned LONG int) LONG_MIN : (unsigned LONG int) LONG_MAX))
256 return negative ? LONG_MIN : LONG_MAX;
260 /* Return the result of the appropriate sign. */
261 return (negative ? -i : i);
264 /* We must handle a special case here: the base is 0 or 16 and the
265 first two characters and '0' and 'x', but the rest are no
266 hexadecimal digits. This is no error case. We return 0 and
267 ENDPTR points to the `x`. */
269 if (save - nptr >= 2 && tolower (save[-1]) == 'x' && save[-2] == '0')
270 *endptr = (char *) &save[-1];
272 /* There was no number to convert. */
273 *endptr = (char *) nptr;
278 /* External user entry point. */
291 return INTERNAL (strtol) (nptr, endptr, base, 0);