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