1 /* 2 This code is based on strtoul.c which has the following copyright. 3 It is used to convert a string into an unsigned long long. 4 5 long long _strtoull_r (struct _reent *rptr, const char *s, 6 char **ptr, int base); 7 8 */ 9 10 /* 11 * Copyright (c) 1990 Regents of the University of California. 12 * All rights reserved. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 */ 42 43 #ifdef __GNUC__ 44 45 #define _GNU_SOURCE 46 #include <_ansi.h> 47 #include <limits.h> 48 #include <ctype.h> 49 #include <errno.h> 50 #include <stdlib.h> 51 #include <reent.h> 52 53 /* 54 * Convert a string to an unsigned long long integer. 55 * 56 * Ignores `locale' stuff. Assumes that the upper and lower case 57 * alphabets and digits are each contiguous. 58 */ 59 unsigned long long 60 _DEFUN (_strtoull_r, (rptr, nptr, endptr, base), 61 struct _reent *rptr _AND 62 _CONST char *nptr _AND 63 char **endptr _AND 64 int base) 65 { 66 register const char *s = nptr; 67 register unsigned long long acc; 68 register int c; 69 register unsigned long long cutoff; 70 register int neg = 0, any, cutlim; 71 72 /* 73 * See strtol for comments as to the logic used. 74 */ 75 do { 76 c = *s++; 77 } while (isspace(c)); 78 if (c == '-') { 79 neg = 1; 80 c = *s++; 81 } else if (c == '+') 82 c = *s++; 83 if ((base == 0 || base == 16) && 84 c == '0' && (*s == 'x' || *s == 'X')) { 85 c = s[1]; 86 s += 2; 87 base = 16; 88 } 89 if (base == 0) 90 base = c == '0' ? 8 : 10; 91 cutoff = (unsigned long long)ULONG_LONG_MAX / (unsigned long long)base; 92 cutlim = (unsigned long long)ULONG_LONG_MAX % (unsigned long long)base; 93 for (acc = 0, any = 0;; c = *s++) { 94 if (isdigit(c)) 95 c -= '0'; 96 else if (isalpha(c)) 97 c -= isupper(c) ? 'A' - 10 : 'a' - 10; 98 else 99 break; 100 if (c >= base) 101 break; 102 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 103 any = -1; 104 else { 105 any = 1; 106 acc *= base; 107 acc += c; 108 } 109 } 110 if (any < 0) { 111 acc = ULONG_LONG_MAX; 112 rptr->_errno = ERANGE; 113 } else if (neg) 114 acc = -acc; 115 if (endptr != 0) 116 *endptr = (char *) (any ? s - 1 : nptr); 117 return (acc); 118 } 119 120 #endif /* __GNUC__ */ 121