1 /* 2 * Copyright (c) 2014 Regents of the University of California. 3 * 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. [rescinded 22 July 1999] 14 * 4. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifdef HAVE_CONFIG_H 32 #include "config.h" 33 #endif 34 #ifdef HAVE_LIMITS_H 35 #include <limits.h> 36 #endif 37 #ifdef HAVE_SYS_PARAM_H 38 #include <sys/param.h> 39 #endif 40 #include <errno.h> 41 #ifdef NEED_DECLARATION_ERRNO 42 extern int errno; 43 #endif 44 #if 0 45 #include <stdlib.h> 46 #endif 47 #include "ansidecl.h" 48 #include "safe-ctype.h" 49 50 #ifdef HAVE_LONG_LONG 51 52 __extension__ 53 typedef unsigned long long ullong_type; 54 55 #ifndef ULLONG_MAX 56 #define ULLONG_MAX (~(ullong_type)0) /* 0xFFFFFFFFFFFFFFFF */ 57 #endif 58 59 /* 60 * Convert a string to an unsigned long long integer. 61 * 62 * Ignores `locale' stuff. Assumes that the upper and lower case 63 * alphabets and digits are each contiguous. 64 */ 65 ullong_type 66 strtoull(const char *nptr, char **endptr, register int base) 67 { 68 register const char *s = nptr; 69 register ullong_type acc; 70 register int c; 71 register ullong_type cutoff; 72 register int neg = 0, any, cutlim; 73 74 /* 75 * See strtol for comments as to the logic used. 76 */ 77 do { 78 c = *s++; 79 } while (ISSPACE(c)); 80 if (c == '-') { 81 neg = 1; 82 c = *s++; 83 } else if (c == '+') 84 c = *s++; 85 if ((base == 0 || base == 16) && 86 c == '0' && (*s == 'x' || *s == 'X')) { 87 c = s[1]; 88 s += 2; 89 base = 16; 90 } 91 if (base == 0) 92 base = c == '0' ? 8 : 10; 93 cutoff = (ullong_type)ULLONG_MAX / (ullong_type)base; 94 cutlim = (ullong_type)ULLONG_MAX % (ullong_type)base; 95 for (acc = 0, any = 0;; c = *s++) { 96 if (ISDIGIT(c)) 97 c -= '0'; 98 else if (ISALPHA(c)) 99 c -= ISUPPER(c) ? 'A' - 10 : 'a' - 10; 100 else 101 break; 102 if (c >= base) 103 break; 104 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 105 any = -1; 106 else { 107 any = 1; 108 acc *= base; 109 acc += c; 110 } 111 } 112 if (any < 0) { 113 acc = ULLONG_MAX; 114 errno = ERANGE; 115 } else if (neg) 116 acc = -acc; 117 if (endptr != 0) 118 *endptr = (char *) (any ? s - 1 : nptr); 119 return (acc); 120 } 121 122 #endif /* ifdef HAVE_LONG_LONG */ 123
