/* $NetBSD: _strtol.h,v 1.11 2017/07/06 21:08:44 joerg Exp $ */ /*- * Copyright (c) 1990, 1993 * 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. 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. * * Original version ID: * NetBSD: src/lib/libc/locale/_wcstol.h,v 1.2 2003/08/07 16:43:03 agc Exp */ /* * function template for strtol, strtoll and strtoimax. * * parameters: * _FUNCNAME : function name * __INT : return type * __INT_MIN : lower limit of the return type * __INT_MAX : upper limit of the return type */ #if defined(_KERNEL) || defined(_STANDALONE) || defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY) __INT _FUNCNAME(const char *nptr, char **endptr, int base) #else #include #include "setlocale_local.h" #define INT_FUNCNAME_(pre, name, post) pre ## name ## post #define INT_FUNCNAME(pre, name, post) INT_FUNCNAME_(pre, name, post) static __INT INT_FUNCNAME(_int_, _FUNCNAME, _l)(const char *nptr, char **endptr, int base, locale_t loc) #endif { const char *s; __INT acc, cutoff; unsigned char c; int i, neg, any, cutlim; _DIAGASSERT(nptr != NULL); /* endptr may be NULL */ /* check base value */ if (base && (base < 2 || base > 36)) { #if !defined(_KERNEL) && !defined(_STANDALONE) errno = EINVAL; if (endptr != NULL) /* LINTED interface specification */ *endptr = __UNCONST(nptr); return 0; #else panic("%s: invalid base %d", __func__, base); #endif } /* * 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. */ s = nptr; #if defined(_KERNEL) || defined(_STANDALONE) || \ defined(HAVE_NBTOOL_CONFIG_H) || defined(BCS_ONLY) do { c = *s++; } while (isspace(c)); #else do { c = *s++; } while (isspace_l(c, loc)); #endif if (c == '-') { neg = 1; c = *s++; } else { neg = 0; if (c == '+') c = *s++; } if ((base == 0 || base == 16) && c == '0' && (*s == 'x' || *s == 'X') && ((s[1] >= '0' && s[1] <= '9') || (s[1] >= 'a' && s[1] <= 'f') || (s[1] >= 'A' && s[1] <= 'F'))) { c = s[1]; s += 2; base = 16; #if 0 } else if ((base == 0 || base == 2) && c == '0' && (*s == 'b' || *s == 'B') && (s[1] >= '0' && s[1] <= '1')) { c = s[1]; s += 2; base = 2; #endif } else 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 = (__INT)(neg ? __INT_MIN : __INT_MAX); cutlim = (int)(cutoff % base); cutoff /= base; if (neg) { if (cutlim > 0) { cutlim -= base; cutoff += 1; } cutlim = -cutlim; } for (acc = 0, any = 0;; c = *s++) { if (c >= '0' && c <= '9') i = c - '0'; else if (c >= 'a' && c <= 'z') i = (c - 'a') + 10; else if (c >= 'A' && c <= 'Z') i = (c - 'A') + 10; else break; if (i >= base) break; if (any < 0) continue; if (neg) { if (acc < cutoff || (acc == cutoff && i > cutlim)) { acc = __INT_MIN; #if !defined(_KERNEL) && !defined(_STANDALONE) any = -1; errno = ERANGE; #else any = 0; break; #endif } else { any = 1; acc *= base; acc -= i; } } else { if (acc > cutoff || (acc == cutoff && i > cutlim)) { acc = __INT_MAX; #if !defined(_KERNEL) && !defined(_STANDALONE) any = -1; errno = ERANGE; #else any = 0; break; #endif } else { any = 1; acc *= base; acc += i; } } } if (endptr != NULL) /* LINTED interface specification */ *endptr = __UNCONST(any ? s - 1 : nptr); return(acc); } #if !defined(_KERNEL) && !defined(_STANDALONE) && \ !defined(HAVE_NBTOOL_CONFIG_H) && !defined(BCS_ONLY) __INT _FUNCNAME(const char *nptr, char **endptr, int base) { return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, _current_locale()); } __INT INT_FUNCNAME(, _FUNCNAME, _l)(const char *nptr, char **endptr, int base, locale_t loc) { return INT_FUNCNAME(_int_, _FUNCNAME, _l)(nptr, endptr, base, loc); } #endif