/*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* modified for long long 1999-08-12 */ #ifdef HAVE_CONFIG_H #include #endif #if HAVE_CTYPE_H #include #endif #if HAVE_ERRNO_H #include #endif /* Specification. */ #include "strtoll.h" #ifndef INT64_MIN /* Native 64 bit system without strtoll() */ #if defined(LONG_MIN) && (SIZEOF_LONG == 8) #define INT64_MIN LONG_MIN #else /* 32 bit system */ #define INT64_MIN -9223372036854775807L-1L #endif #endif #ifndef INT64_MAX /* Native 64 bit system without strtoll() */ #if defined(LONG_MAX) && (SIZEOF_LONG == 8) #define INT64_MAX LONG_MAX #else /* 32 bit system */ #define INT64_MAX 9223372036854775807L #endif #endif /* * Convert a string to a int64 integer. * * Ignores `locale' stuff. Assumes that the upper and lower case * alphabets and digits are each contiguous. */ int64_t strtoll (const char *nptr, char **endptr, int base) { register const char *s = nptr; register u_int64_t acc; register int c; register u_int64_t cutoff; register int neg = 0, any, cutlim; /* * Skip white space and pick up leading +/- sign if any. * If base is 0, allow 0x for hex and 0 for octal, else * assume decimal; if base is already 16, allow 0x. */ do { c = *s++; } while (xisspace(c)); if (c == '-') { neg = 1; c = *s++; } else if (c == '+') c = *s++; if ((base == 0 || base == 16) && c == '0' && (*s == 'x' || *s == 'X')) { c = s[1]; s += 2; base = 16; } if (base == 0) base = c == '0' ? 8 : 10; /* * Compute the cutoff value between legal numbers and illegal * numbers. That is the largest legal value, divided by the * base. An input number that is greater than this value, if * followed by a legal input character, is too big. One that * is equal to this value may be valid or not; the limit * between valid and invalid numbers is then based on the last * digit. For instance, if the range for longs is * [-2147483648..2147483647] and the input base is 10, * cutoff will be set to 214748364 and cutlim to either * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated * a value > 214748364, or equal but the next digit is > 7 (or 8), * the number is too big, and we will return a range error. * * Set any if any `digits' consumed; make it negative to indicate * overflow. */ cutoff = neg ? -(u_int64_t) INT64_MIN : INT64_MAX; cutlim = cutoff % (u_int64_t) base; cutoff /= (u_int64_t) base; for (acc = 0, any = 0;; c = *s++) { if (xisdigit(c)) c -= '0'; else if (xisalpha(c)) c -= xisupper(c) ? 'A' - 10 : 'a' - 10; else break; if (c >= base) break; if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) any = -1; else { any = 1; acc *= base; acc += c; } } if (any < 0) { acc = neg ? INT64_MIN : INT64_MAX; errno = ERANGE; } else if (neg) acc = -acc; if (endptr != 0) *endptr = (char *) (any ? s - 1 : nptr); return acc; }