1 /* $NetBSD: _strtoul.h,v 1.11 2017/07/06 21:08:44 joerg 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 53 static __UINT 54 INT_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 if (endptr != NULL) 71 /* LINTED interface specification */ 72 *endptr = __UNCONST(nptr); 73 return 0; 74 #else 75 panic("%s: invalid base %d", __func__, base); 76 #endif 77 } 78 79 /* 80 * Skip white space and pick up leading +/- sign if any. 81 * If base is 0, allow 0x for hex and 0 for octal, else 82 * assume decimal; if base is already 16, allow 0x. 83 */ 84 s = nptr; 85 #if defined(_KERNEL) || defined(_STANDALONE) || \ 86 defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY) 87 do { 88 c = *s++; 89 } while (isspace(c)); 90 #else 91 do { 92 c = *s++; 93 } while (isspace_l(c, loc)); 94 #endif 95 if (c == '-') { 96 neg = 1; 97 c = *s++; 98 } else { 99 neg = 0; 100 if (c == '+') 101 c = *s++; 102 } 103 if ((base == 0 || base == 16) && 104 c == '0' && (*s == 'x' || *s == 'X') && 105 ((s[1] >= '0' && s[1] <= '9') || 106 (s[1] >= 'a' && s[1] <= 'f') || 107 (s[1] >= 'A' && s[1] <= 'F'))) { 108 c = s[1]; 109 s += 2; 110 base = 16; 111 #if 0 112 } else if ((base == 0 || base == 2) && 113 c == '0' && (*s == 'b' || *s == 'B') && 114 (s[1] >= '0' && s[1] <= '1')) { 115 c = s[1]; 116 s += 2; 117 base = 2; 118 #endif 119 } else if (base == 0) 120 base = (c == '0' ? 8 : 10); 121 122 /* 123 * See strtol for comments as to the logic used. 124 */ 125 cutoff = ((__UINT)__UINT_MAX / (__UINT)base); 126 cutlim = (int)((__UINT)__UINT_MAX % (__UINT)base); 127 for (acc = 0, any = 0;; c = *s++) { 128 if (c >= '0' && c <= '9') 129 i = c - '0'; 130 else if (c >= 'a' && c <= 'z') 131 i = (c - 'a') + 10; 132 else if (c >= 'A' && c <= 'Z') 133 i = (c - 'A') + 10; 134 else 135 break; 136 if (i >= base) 137 break; 138 if (any < 0) 139 continue; 140 if (acc > cutoff || (acc == cutoff && i > cutlim)) { 141 acc = __UINT_MAX; 142 #if !defined(_KERNEL) && !defined(_STANDALONE) 143 any = -1; 144 errno = ERANGE; 145 #else 146 any = 0; 147 break; 148 #endif 149 } else { 150 any = 1; 151 acc *= (__UINT)base; 152 acc += i; 153 } 154 } 155 if (neg && any > 0) 156 acc = -acc; 157 if (endptr != NULL) 158 /* LINTED interface specification */ 159 *endptr = __UNCONST(any ? s - 1 : nptr); 160 return(acc); 161 } 162 163 #if !defined(_KERNEL) && !defined(_STANDALONE) && \ 164 !defined(HAVE_NBTOOL_CONFIG_H) && !defined(BCS_ONLY) 165 __UINT 166 _FUNCNAME(const char *nptr, char **endptr, int base) 167 { 168 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, _current_locale()); 169 } 170 171 __UINT 172 INT_FUNCNAME(, _FUNCNAME, _l)(const char *nptr, char **endptr, int base, locale_t loc) 173 { 174 return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, loc); 175 } 176 #endif 177