1 /*- 2 * Copyright (c) 1992, 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 * 4. 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 30 31 #include <limits.h> 32 #ifdef HAVE_ERRNO_H 33 #include <errno.h> 34 #endif 35 #include <stdlib.h> 36 #ifdef DBUS_WINCE 37 #include <windows.h> 38 #endif 39 40 #ifndef isspace 41 #define isspace(c) ((c) == ' ' || (c) == '\t' || (c) == '\r' || (c) == '\n') 42 #endif 43 44 /* Minimum and maximum values a `signed long long int' can hold. */ 45 #ifndef LLONG_MAX 46 # define LLONG_MAX 9223372036854775807LL 47 #endif 48 49 #ifndef LLONG_MIN 50 # define LLONG_MIN (-LLONG_MAX - 1LL) 51 #endif 52 /* Maximum value an `unsigned long long int' can hold. (Minimum is 0.) */ 53 #ifndef ULLONG_MAX 54 # define ULLONG_MAX 18446744073709551615ULL 55 #endif 56 /* 57 * Convert a string to a long long integer. 58 * 59 * Assumes that the upper and lower case 60 * alphabets and digits are each contiguous. 61 */ 62 long long strtoll (const char*, char **, int); 63 64 long long 65 strtoll(const char * nptr, char ** endptr, int base) 66 { 67 const char *s; 68 unsigned long long acc; 69 char c; 70 unsigned long long cutoff; 71 int neg, any, cutlim; 72 73 /* 74 * Skip white space and pick up leading +/- sign if any. 75 * If base is 0, allow 0x for hex and 0 for octal, else 76 * assume decimal; if base is already 16, allow 0x. 77 */ 78 s = nptr; 79 do { 80 c = *s++; 81 } while (isspace((unsigned char)c)); 82 if (c == '-') { 83 neg = 1; 84 c = *s++; 85 } else { 86 neg = 0; 87 if (c == '+') 88 c = *s++; 89 } 90 if ((base == 0 || base == 16) && 91 c == '0' && (*s == 'x' || *s == 'X') && 92 ((s[1] >= '0' && s[1] <= '9') || 93 (s[1] >= 'A' && s[1] <= 'F') || 94 (s[1] >= 'a' && s[1] <= 'f'))) { 95 c = s[1]; 96 s += 2; 97 base = 16; 98 } 99 if (base == 0) 100 base = c == '0' ? 8 : 10; 101 acc = any = 0; 102 if (base < 2 || base > 36) 103 goto noconv; 104 105 /* 106 * Compute the cutoff value between legal numbers and illegal 107 * numbers. That is the largest legal value, divided by the 108 * base. An input number that is greater than this value, if 109 * followed by a legal input character, is too big. One that 110 * is equal to this value may be valid or not; the limit 111 * between valid and invalid numbers is then based on the last 112 * digit. For instance, if the range for quads is 113 * [-9223372036854775808..9223372036854775807] and the input base 114 * is 10, cutoff will be set to 922337203685477580 and cutlim to 115 * either 7 (neg==0) or 8 (neg==1), meaning that if we have 116 * accumulated a value > 922337203685477580, or equal but the 117 * next digit is > 7 (or 8), the number is too big, and we will 118 * return a range error. 119 * 120 * Set 'any' if any `digits' consumed; make it negative to indicate 121 * overflow. 122 */ 123 cutoff = neg ? (unsigned long long)-(LLONG_MIN + LLONG_MAX) + LLONG_MAX 124 : LLONG_MAX; 125 cutlim = cutoff % base; 126 cutoff /= base; 127 for ( ; ; c = *s++) { 128 if (c >= '0' && c <= '9') 129 c -= '0'; 130 else if (c >= 'A' && c <= 'Z') 131 c -= 'A' - 10; 132 else if (c >= 'a' && c <= 'z') 133 c -= 'a' - 10; 134 else 135 break; 136 if (c >= base) 137 break; 138 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) 139 any = -1; 140 else { 141 any = 1; 142 acc *= base; 143 acc += c; 144 } 145 } 146 if (any < 0) { 147 acc = neg ? LLONG_MIN : LLONG_MAX; 148 #ifdef DBUS_WINCE 149 SetLastError (ERROR_ARITHMETIC_OVERFLOW); 150 #else 151 errno = ERANGE; 152 #endif 153 } else if (!any) { 154 noconv: 155 #ifdef DBUS_WINCE 156 SetLastError (ERROR_INVALID_PARAMETER); 157 #else 158 errno = EINVAL; 159 #endif 160 } else if (neg) 161 acc = -acc; 162 if (endptr != NULL) 163 *endptr = (char *)(any ? s - 1 : nptr); 164 return (acc); 165 } 166 167
