## modules/up/src/Core/util/strtol.c

/* [<][>][^][v][top][bottom][index][help] */

## FUNCTIONS

This source file includes following functions.

1. __set_errno
2. L_
3. ISSPACE
4. ISALPHA
5. TOUPPER
6. L_
7. ISSPACE
8. ISALPHA
9. TOUPPER
10. INTERNAL
11. INTERNAL1
12. WEAKNAME
13. INTERNAL
14. INTERNAL
15. PARAMS
16. PARAMS
17. strtol

       1 /* strtol - Convert string representation of a number into an integer value.
       2    Copyright (C) 1991, 92, 94, 95, 96, 97 Free Software Foundation, Inc.
       3    This file is part of the GNU C Library.
       4
       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.
       9
      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.
      14
      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 not,
      17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
      18    Boston, MA 02111-1307, USA.  */
      19
      20 #if HAVE_CONFIG_H
      21 # include <config.h>
      22 #endif
      23
      24 #ifdef _LIBC
      25 # define USE_NUMBER_GROUPING
      26 # define STDC_HEADERS
      27 # define HAVE_LIMITS_H
      28 #endif
      29
      30 #include <ctype.h>
      31 #include <errno.h>
      32 #include <limits.h>
      33 #ifndef errno
      34 extern int errno;
      35 #endif
      36 #ifndef __set_errno
      37 # define __set_errno(Val) errno = (Val)
         /* [<][>][^][v][top][bottom][index][help] */
      38 #endif
      39
      40 #ifdef HAVE_LIMITS_H
      41 # include <limits.h>
      42 #endif
      43
      44 #ifdef STDC_HEADERS
      45 # include <stddef.h>
      46 # include <stdlib.h>
      47 # include <string.h>
      48 #else
      49 # ifndef NULL
      50 #  define NULL 0
      51 # endif
      52 #endif
      53
      54 #ifdef USE_NUMBER_GROUPING
      55 # include "../locale/localeinfo.h"
      56 #endif
      57
      58 /* Nonzero if we are defining `strtoul' or `strtouq', operating on
      59    unsigned integers.  */
      60 #ifndef UNSIGNED
      61 # define UNSIGNED 0
      62 # define INT LONG int
      63 #else
      64 # define INT unsigned LONG int
      65 #endif
      66
      67 /* Determine the name.  */
      68 #if UNSIGNED
      69 # ifdef USE_WIDE_CHAR
      70 #  ifdef QUAD
      71 #   define strtol wcstouq
      72 #  else
      73 #   define strtol wcstoul
      74 #  endif
      75 # else
      76 #  ifdef QUAD
      77 #   define strtol strtouq
      78 #  else
      79 #   define strtol strtoul
      80 #  endif
      81 # endif
      82 #else
      83 # ifdef USE_WIDE_CHAR
      84 #  ifdef QUAD
      85 #   define strtol wcstoq
      86 #  else
      87 #   define strtol wcstol
      88 #  endif
      89 # else
      90 #  ifdef QUAD
      91 #   define strtol strtoq
      92 #  endif
      93 # endif
      94 #endif
      95
      96 /* If QUAD is defined, we are defining `strtoq' or `strtouq',
      97    operating on `long long int's.  */
      98 #ifdef QUAD
      99 # define LONG long long
     100 # undef LONG_MIN
     101 # define LONG_MIN LONG_LONG_MIN
     102 # undef LONG_MAX
     103 # define LONG_MAX LONG_LONG_MAX
     104 # undef ULONG_MAX
     105 # define ULONG_MAX ULONG_LONG_MAX
     106 # if __GNUC__ == 2 && __GNUC_MINOR__ < 7
     107    /* Work around gcc bug with using this constant.  */
     108    static const unsigned long long int maxquad = ULONG_LONG_MAX;
     109 #  undef ULONG_MAX
     110 #  define ULONG_MAX maxquad
     111 # endif
     112 #else
     113 # define LONG long
     114
     115 #ifndef ULONG_MAX
     116 # define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
     117 #endif
     118 #ifndef LONG_MAX
     119 # define LONG_MAX ((long int) (ULONG_MAX >> 1))
     120 #endif
     121 #endif
     122
     123 #ifdef USE_WIDE_CHAR
     124 # include <wchar.h>
     125 # include <wctype.h>
     126 # define L_(Ch) L##Ch
         /* [<][>][^][v][top][bottom][index][help] */
     127 # define UCHAR_TYPE wint_t
     128 # define STRING_TYPE wchar_t
     129 # define ISSPACE(Ch) iswspace (Ch)
         /* [<][>][^][v][top][bottom][index][help] */
     130 # define ISALPHA(Ch) iswalpha (Ch)
         /* [<][>][^][v][top][bottom][index][help] */
     131 # define TOUPPER(Ch) towupper (Ch)
         /* [<][>][^][v][top][bottom][index][help] */
     132 #else
     133 # define L_(Ch) Ch
         /* [<][>][^][v][top][bottom][index][help] */
     134 # define UCHAR_TYPE unsigned char
     135 # define STRING_TYPE char
     136 # define ISSPACE(Ch) isspace (Ch)
         /* [<][>][^][v][top][bottom][index][help] */
     137 # define ISALPHA(Ch) isalpha (Ch)
         /* [<][>][^][v][top][bottom][index][help] */
     138 # define TOUPPER(Ch) toupper (Ch)
         /* [<][>][^][v][top][bottom][index][help] */
     139 #endif
     140
     141 #ifdef __STDC__
     142 # define INTERNAL(X) INTERNAL1(X)
         /* [<][>][^][v][top][bottom][index][help] */
     143 # define INTERNAL1(X) __##X##_internal
         /* [<][>][^][v][top][bottom][index][help] */
     144 # define WEAKNAME(X) WEAKNAME1(X)
         /* [<][>][^][v][top][bottom][index][help] */
     145 #else
     146 # define INTERNAL(X) __/**/X/**/_internal
         /* [<][>][^][v][top][bottom][index][help] */
     147 #endif
     148
     149 #ifdef USE_NUMBER_GROUPING
     150 /* This file defines a function to check for correct grouping.  */
     151 # include "grouping.h"
     152 #endif
     153
     154
     155 /* Convert NPTR to an `unsigned long int' or `long int' in base BASE.
     156    If BASE is 0 the base is determined by the presence of a leading
     157    zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal.
     158    If BASE is < 2 or > 36, it is reset to 10.
     159    If ENDPTR is not NULL, a pointer to the character after the last
     160    one converted is stored in *ENDPTR.  */
     161
     162 INT
     163 INTERNAL (strtol) (nptr, endptr, base, group)
         /* [<][>][^][v][top][bottom][index][help] */
     164      const STRING_TYPE *nptr;
     165      STRING_TYPE **endptr;
     166      int base;
     167      int group;
     168 {
     169   int negative;
     170   register unsigned LONG int cutoff;
     171   register unsigned int cutlim;
     172   register unsigned LONG int i;
     173   register const STRING_TYPE *s;
     174   register UCHAR_TYPE c;
     175   const STRING_TYPE *save, *end;
     176   int overflow;
     177
     178 #ifdef USE_NUMBER_GROUPING
     179   /* The thousands character of the current locale.  */
     180   wchar_t thousands;
     181   /* The numeric grouping specification of the current locale,
     182      in the format described in <locale.h>.  */
     183   const char *grouping;
     184
     185   if (group)
     186     {
     187       grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
     188       if (*grouping <= 0 || *grouping == CHAR_MAX)
     189         grouping = NULL;
     190       else
     191         {
     192           /* Figure out the thousands separator character.  */
     193           if (mbtowc (&thousands, _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
     194                       strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
     195             thousands = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
     196           if (thousands == L'\0')
     197             grouping = NULL;
     198         }
     199     }
     200   else
     201     grouping = NULL;
     202 #endif
     203
     204   if (base < 0 || base == 1 || base > 36)
     205     {
     206       __set_errno (EINVAL);
     207       return 0;
     208     }
     209
     210   save = s = nptr;
     211
     212   /* Skip white space.  */
     213   while (ISSPACE (*s))
     214     ++s;
     215   if (*s == L_('\0'))
     216     goto noconv;
     217
     218   /* Check for a sign.  */
     219   if (*s == L_('-'))
     220     {
     221       negative = 1;
     222       ++s;
     223     }
     224   else if (*s == L_('+'))
     225     {
     226       negative = 0;
     227       ++s;
     228     }
     229   else
     230     negative = 0;
     231
     232   if (base == 16 && s[0] == L_('0') && TOUPPER (s[1]) == L_('X'))
     233     s += 2;
     234
     235   /* If BASE is zero, figure it out ourselves.  */
     236   if (base == 0)
     237     if (*s == L_('0'))
     238       {
     239         if (TOUPPER (s[1]) == L_('X'))
     240           {
     241             s += 2;
     242             base = 16;
     243           }
     244         else
     245           base = 8;
     246       }
     247     else
     248       base = 10;
     249
     250   /* Save the pointer so we can check later if anything happened.  */
     251   save = s;
     252
     253 #ifdef USE_NUMBER_GROUPING
     254   if (group)
     255     {
     256       /* Find the end of the digit string and check its grouping.  */
     257       end = s;
     258       for (c = *end; c != L_('\0'); c = *++end)
     259         if ((wchar_t) c != thousands
     260             && ((wchar_t) c < L_('0') || (wchar_t) c > L_('9'))
     261             && (!ISALPHA (c) || (int) (TOUPPER (c) - L_('A') + 10) >= base))
     262           break;
     263       if (*s == thousands)
     264         end = s;
     265       else
     266         end = correctly_grouped_prefix (s, end, thousands, grouping);
     267     }
     268   else
     269 #endif
     270     end = NULL;
     271
     272   cutoff = ULONG_MAX / (unsigned LONG int) base;
     273   cutlim = ULONG_MAX % (unsigned LONG int) base;
     274
     275   overflow = 0;
     276   i = 0;
     277   for (c = *s; c != L_('\0'); c = *++s)
     278     {
     279       if (s == end)
     280         break;
     281       if (c >= L_('0') && c <= L_('9'))
     282         c -= L_('0');
     283       else if (ISALPHA (c))
     284         c = TOUPPER (c) - L_('A') + 10;
     285       else
     286         break;
     287       if ((int) c >= base)
     288         break;
     289       /* Check for overflow.  */
     290       if (i > cutoff || (i == cutoff && c > cutlim))
     291         overflow = 1;
     292       else
     293         {
     294           i *= (unsigned LONG int) base;
     295           i += c;
     296         }
     297     }
     298
     299   /* Check if anything actually happened.  */
     300   if (s == save)
     301     goto noconv;
     302
     303   /* Store in ENDPTR the address of one character
     304      past the last character we converted.  */
     305   if (endptr != NULL)
     306     *endptr = (STRING_TYPE *) s;
     307
     308 #if !UNSIGNED
     309   /* Check for a value that is within the range of
     310      `unsigned LONG int', but outside the range of `LONG int'.  */
     311   if (overflow == 0
     312       && i > (negative
     313               ? -((unsigned LONG int) (LONG_MIN + 1)) + 1
     314               : (unsigned LONG int) LONG_MAX))
     315     overflow = 1;
     316 #endif
     317
     318   if (overflow)
     319     {
     320       __set_errno (ERANGE);
     321 #if UNSIGNED
     322       return ULONG_MAX;
     323 #else
     324       return negative ? LONG_MIN : LONG_MAX;
     325 #endif
     326     }
     327
     328   /* Return the result of the appropriate sign.  */
     329   return (negative ? -i : i);
     330
     331 noconv:
     332   /* We must handle a special case here: the base is 0 or 16 and the
     333      first two characters are '0' and 'x', but the rest are no
     334      hexadecimal digits.  This is no error case.  We return 0 and
     335      ENDPTR points to the `x`.  */
     336   if (endptr != NULL)
     337     if (save - nptr >= 2 && TOUPPER (save[-1]) == L_('X')
     338         && save[-2] == L_('0'))
     339       *endptr = (STRING_TYPE *) &save[-1];
     340     else
     341       /*  There was no number to convert.  */
     342       *endptr = (STRING_TYPE *) nptr;
     343
     344   return 0L;
     345 }
     346
     347 /* External user entry point.  */
     348
     349 #if _LIBC - 0 == 0
     350 # undef PARAMS
     351 # if defined (__STDC__) && __STDC__
     352 #  define PARAMS(Args) Args
         /* [<][>][^][v][top][bottom][index][help] */
     353 # else
     354 #  define PARAMS(Args) ()
         /* [<][>][^][v][top][bottom][index][help] */
     355 # endif
     356
     357 /* Prototype.  */
     358 INT strtol PARAMS ((const STRING_TYPE *nptr, STRING_TYPE **endptr, int base));
     359 #endif
     360
     361
     362 INT
     363 #ifdef weak_function
     364 weak_function
     365 #endif
     366 strtol (nptr, endptr, base)
         /* [<][>][^][v][top][bottom][index][help] */
     367      const STRING_TYPE *nptr;
     368      STRING_TYPE **endptr;
     369      int base;
     370 {
     371   return INTERNAL (strtol) (nptr, endptr, base, 0);
     372 }

/* [<][>][^][v][top][bottom][index][help] */