1 /* $NetBSD: strtoumax.c,v 1.1.1.1 2016/01/10 21:36:19 christos Exp $ */ 2 3 /* Convert string representation of a number into an uintmax_t value. 4 Copyright 1999 Free Software Foundation, Inc. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 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. 15 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 Foundation, 18 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 19 20 /* Written by Paul Eggert. */ 21 22 #if HAVE_CONFIG_H 23 # include <config.h> 24 #endif 25 26 #if HAVE_INTTYPES_H 27 # include <inttypes.h> 28 #endif 29 30 #if HAVE_STDLIB_H 31 # include <stdlib.h> 32 #endif 33 34 #ifndef PARAMS 35 # if defined PROTOTYPES || defined __STDC__ 36 # define PARAMS(Args) Args 37 # else 38 # define PARAMS(Args) () 39 # endif 40 #endif 41 42 #ifndef HAVE_DECL_STRTOUL 43 "this configure-time declaration test was not run" 44 #endif 45 #if !HAVE_DECL_STRTOUL 46 unsigned long strtoul PARAMS ((char const *, char **, int)); 47 #endif 48 49 #ifndef HAVE_DECL_STRTOULL 50 "this configure-time declaration test was not run" 51 #endif 52 #if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG 53 unsigned long long strtoull PARAMS ((char const *, char **, int)); 54 #endif 55 56 uintmax_t 57 strtoumax (char const *ptr, char **endptr, int base) 58 { 59 #define USE_IF_EQUIVALENT(function) \ 60 if (sizeof (uintmax_t) == sizeof function (ptr, endptr, base)) \ 61 return function (ptr, endptr, base); 62 63 #if HAVE_UNSIGNED_LONG_LONG 64 USE_IF_EQUIVALENT (strtoull) 65 #endif 66 67 USE_IF_EQUIVALENT (strtoul) 68 69 abort (); 70 } 71 72 #ifdef TESTING 73 # include <stdio.h> 74 int 75 main () 76 { 77 char *p, *endptr; 78 printf ("sizeof uintmax_t: %d\n", sizeof (uintmax_t)); 79 printf ("sizeof strtoull(): %d\n", sizeof strtoull(p, &endptr, 10)); 80 printf ("sizeof strtoul(): %d\n", sizeof strtoul(p, &endptr, 10)); 81 exit (0); 82 } 83 #endif 84