_strtoul.h revision 1.8
1/* $NetBSD: _strtoul.h,v 1.8 2015/11/12 17:23:51 christos Exp $ */ 2 3/*- 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * Original version ID: 32 * NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp 33 */ 34 35/* 36 * function template for strtoul, strtoull and strtoumax. 37 * 38 * parameters: 39 * _FUNCNAME : function name 40 * __UINT : return type 41 * __UINT_MAX : upper limit of the return type 42 */ 43#if defined(_KERNEL) || defined(_STANDALONE) || \ 44 defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY) 45__UINT 46_FUNCNAME(const char *nptr, char **endptr, int base) 47#else 48#include <locale.h> 49#include "setlocale_local.h" 50#define INT_FUNCNAME_(pre, name, post) pre ## name ## post 51#define INT_FUNCNAME(pre, name, post) INT_FUNCNAME_(pre, name, post) 52 53static __UINT 54INT_FUNCNAME(_int_, _FUNCNAME, _l)(const char *nptr, char **endptr, 55 int base, locale_t loc) 56#endif 57{ 58 const char *s; 59 __UINT acc, cutoff; 60 unsigned char c; 61 int i, neg, any, cutlim; 62 63 _DIAGASSERT(nptr != NULL); 64 /* endptr may be NULL */ 65 66 /* check base value */ 67 if (base && (base < 2 || base > 36)) { 68#if !defined(_KERNEL) && !defined(_STANDALONE) 69 errno = EINVAL; 70 return(0); 71#else 72 panic("%s: invalid base %d", __func__, base); 73#endif 74 } 75 76 /* 77 * Skip white space and pick up leading +/- sign if any. 78 * If base is 0, allow 0x for hex and 0 for octal, else 79 * assume decimal; if base is already 16, allow 0x. 80 */ 81 s = nptr; 82#if defined(_KERNEL) || defined(_STANDALONE) || \ 83 defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY) 84 do { 85 c = *s++; 86 } while (isspace(c)); 87#else 88 do { 89 c = *s++; 90 } while (isspace_l(c, loc)); 91#endif 92 if (c == '-') { 93 neg = 1; 94 c = *s++; 95 } else { 96 neg = 0; 97 if (c == '+') 98 c = *s++; 99 } 100 if ((base == 0 || base == 16) && 101 c == '0' && (*s == 'x' || *s == 'X')) { 102 c = s[1]; 103 s += 2; 104 base = 16; 105 } else if ((base == 0 || base == 2) && 106 c == '0' && (*s == 'b' || *s == 'B')) { 107 c = s[1]; 108 s += 2; 109 base = 2; 110 } else if (base == 0) 111 base = (c == '0' ? 8 : 10); 112 113 /* 114 * See strtol for comments as to the logic used. 115 */ 116 cutoff = ((__UINT)__UINT_MAX / (__UINT)base); 117 cutlim = (int)((__UINT)__UINT_MAX % (__UINT)base); 118 for (acc = 0, any = 0;; c = *s++) { 119 if (c >= '0' && c <= '9') 120 i = c - '0'; 121 else if (c >= 'a' && c <= 'z') 122 i = (c - 'a') + 10; 123 else if (c >= 'A' && c <= 'Z') 124 i = (c - 'A') + 10; 125 else 126 break; 127 if (i >= base) 128 break; 129 if (any < 0) 130 continue; 131 if (acc > cutoff || (acc == cutoff && i > cutlim)) { 132 acc = __UINT_MAX; 133#if !defined(_KERNEL) && !defined(_STANDALONE) 134 any = -1; 135 errno = ERANGE; 136#else 137 any = 0; 138 break; 139#endif 140 } else { 141 any = 1; 142 acc *= (__UINT)base; 143 acc += i; 144 } 145 } 146 if (neg && any > 0) 147 acc = -acc; 148 if (endptr != NULL) 149 /* LINTED interface specification */ 150 *endptr = __UNCONST(any ? s - 1 : nptr); 151 return(acc); 152} 153 154#if !defined(_KERNEL) && !defined(_STANDALONE) && \ 155 !defined(HAVE_NBTOOL_CONFIG_H) && !defined(BCS_ONLY) 156__UINT 157_FUNCNAME(const char *nptr, char **endptr, int base) 158{ 159 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, _current_locale()); 160} 161 162__UINT 163INT_FUNCNAME(, _FUNCNAME, _l)(const char *nptr, char **endptr, int base, locale_t loc) 164{ 165 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, loc); 166} 167#endif 168