lib/sh/strtoimax.c

   1 /* strtoimax - convert string representation of a number into an intmax_t value. */
   2
   3 /* Copyright 1999-2020 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    Bash is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 /* Written by Paul Eggert.  Modified by Chet Ramey for Bash. */
  22
  23 #if HAVE_CONFIG_H
  24 #  include <config.h>
  25 #endif
  26
  27 #if HAVE_INTTYPES_H
  28 #  include <inttypes.h>
  29 #endif
  30
  31 #if HAVE_STDINT_H
  32 #  include <stdint.h>
  33 #endif
  34
  35 #if HAVE_STDLIB_H
  36 #  include <stdlib.h>
  37 #endif
  38
  39 #include <stdc.h>
  40
  41 /* Verify a requirement at compile-time (unlike assert, which is runtime).  */
  42 #define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
  43
  44 #ifndef HAVE_DECL_STRTOL
  45 "this configure-time declaration test was not run"
  46 #endif
  47 #if !HAVE_DECL_STRTOL
  48 extern long strtol PARAMS((const char *, char **, int));
  49 #endif
  50
  51 #ifndef HAVE_DECL_STRTOLL
  52 "this configure-time declaration test was not run"
  53 #endif
  54 #if !HAVE_DECL_STRTOLL && HAVE_LONG_LONG_INT
  55 extern long long strtoll PARAMS((const char *, char **, int));
  56 #endif
  57
  58 #ifdef strtoimax
  59 #undef strtoimax
  60 #endif
  61
  62 intmax_t
  63 strtoimax (ptr, endptr, base)
  64      const char *ptr;
  65      char **endptr;
  66      int base;
  67 {
  68 #if HAVE_LONG_LONG_INT
  69   verify(size_is_that_of_long_or_long_long,
  70          (sizeof (intmax_t) == sizeof (long) ||
  71           sizeof (intmax_t) == sizeof (long long)));
  72
  73   if (sizeof (intmax_t) != sizeof (long))
  74     return (strtoll (ptr, endptr, base));
  75 #else
  76   verify (size_is_that_of_long, sizeof (intmax_t) == sizeof (long));
  77 #endif
  78
  79   return (strtol (ptr, endptr, base));
  80 }
  81
  82 #ifdef TESTING
  83 # include <stdio.h>
  84 int
  85 main ()
  86 {
  87   char *p, *endptr;
  88   intmax_t x;
  89 #if HAVE_LONG_LONG_INT
  90   long long y;
  91 #endif
  92   long z;
  93
  94   printf ("sizeof intmax_t: %d\n", sizeof (intmax_t));
  95
  96 #if HAVE_LONG_LONG_INT
  97   printf ("sizeof long long: %d\n", sizeof (long long));
  98 #endif
  99   printf ("sizeof long: %d\n", sizeof (long));
 100
 101   x = strtoimax("42", &endptr, 10);
 102 #if HAVE_LONG_LONG_INT
 103   y = strtoll("42", &endptr, 10);
 104 #else
 105   y = -1;
 106 #endif
 107   z = strtol("42", &endptr, 10);
 108
 109   printf ("%lld %lld %ld\n", x, y, z);
 110
 111   exit (0);
 112 }
 113 #endif