/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* Copyright (c) 1988 AT&T */ /* All Rights Reserved */ /* * Copyright 2005 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 2.15 */ #if !defined(_BOOT) && !defined(_KMDB) #include "synonyms.h" #endif /* !_BOOT && !_KMDB */ #include <errno.h> #include <ctype.h> #include <limits.h> #include <sys/types.h> #include <stdlib.h> #define DIGIT(x) \ (isdigit(x) ? (x) - '0' : islower(x) ? (x) + 10 - 'a' : (x) + 10 - 'A') #define MBASE ('z' - 'a' + 1 + 10) /* * The following macro is a local version of isalnum() which limits * alphabetic characters to the ranges a-z and A-Z; locale dependent * characters will not return 1. The members of a-z and A-Z are * assumed to be in ascending order and contiguous */ #define lisalnum(x) \ (isdigit(x) || ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z')) long strtol(const char *str, char **nptr, int base) { long val; int c; int xx, neg = 0; long multmin; long limit; const char **ptr = (const char **)nptr; const unsigned char *ustr = (const unsigned char *)str; if (ptr != (const char **)0) *ptr = (char *)ustr; /* in case no number is formed */ if (base < 0 || base > MBASE || base == 1) { errno = EINVAL; return (0); /* base is invalid -- should be a fatal error */ } if (!isalnum(c = *ustr)) { while (isspace(c)) c = *++ustr; switch (c) { case '-': neg++; /* FALLTHROUGH */ case '+': c = *++ustr; } } if (base == 0) if (c != '0') base = 10; else if (ustr[1] == 'x' || ustr[1] == 'X') base = 16; else base = 8; /* * for any base > 10, the digits incrementally following * 9 are assumed to be "abc...z" or "ABC...Z" */ if (!lisalnum(c) || (xx = DIGIT(c)) >= base) return (0); /* no number formed */ if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') && isxdigit(ustr[2])) c = *(ustr += 2); /* skip over leading "0x" or "0X" */ /* this code assumes that abs(LONG_MIN) >= abs(LONG_MAX) */ if (neg) limit = LONG_MIN; else limit = -LONG_MAX; multmin = limit / (long)base; val = -DIGIT(c); for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) { /* accumulate neg avoids surprises near MAXLONG */ if (val < multmin) goto overflow; val *= base; if (val < limit + xx) goto overflow; val -= xx; c = *++ustr; } if (ptr != (const char **)0) *ptr = (char *)ustr; return (neg ? val : -val); overflow: for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr)) ; if (ptr != (const char **)0) *ptr = (char *)ustr; errno = ERANGE; return (neg ? LONG_MIN : LONG_MAX); }