Home | History | Annotate | Download | only in util
      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1988 AT&T	*/
     28 /*	  All Rights Reserved  	*/
     29 
     30 #if	defined(_KERNEL) && !defined(_BOOT)
     31 #include <sys/errno.h>
     32 #else	/* _KERNEL && !_BOOT */
     33 #if	!defined(_BOOT) && !defined(_KMDB)
     34 #include "lint.h"
     35 #endif	/* !_BOOT && !_KMDB */
     36 #include <errno.h>
     37 #include <ctype.h>
     38 #include <limits.h>
     39 #include <stdlib.h>
     40 #endif	/* _KERNEL && !_BOOT */
     41 #include "strtolctype.h"
     42 #include <sys/types.h>
     43 
     44 #if	defined(_KERNEL) && !defined(_BOOT)
     45 int
     46 ddi_strtoll(const char *str, char **nptr, int base, longlong_t *result)
     47 #else	/* _KERNEL && !_BOOT */
     48 longlong_t
     49 strtoll(const char *str, char **nptr, int base)
     50 #endif	/* _KERNEL && !_BOOT */
     51 {
     52 	longlong_t val;
     53 	int c;
     54 	int xx;
     55 	int neg = 0;
     56 	longlong_t multmin;
     57 	longlong_t limit;
     58 	const char **ptr = (const char **)nptr;
     59 	const unsigned char *ustr = (const unsigned char *)str;
     60 
     61 	if (ptr != (const char **)0)
     62 		*ptr = (char *)ustr; /* in case no number is formed */
     63 	if (base < 0 || base > MBASE || base == 1) {
     64 		/* base is invalid -- should be a fatal error */
     65 #if	defined(_KERNEL) && !defined(_BOOT)
     66 		return (EINVAL);
     67 #else	/* _KERNEL && !_BOOT */
     68 		errno = EINVAL;
     69 		return (0);
     70 #endif	/* _KERNEL && !_BOOT */
     71 	}
     72 	if (!isalnum(c = *ustr)) {
     73 		while (isspace(c))
     74 			c = *++ustr;
     75 		switch (c) {
     76 		case '-':
     77 			neg++;
     78 			/* FALLTHROUGH */
     79 		case '+':
     80 			c = *++ustr;
     81 		}
     82 	}
     83 	if (base == 0)
     84 		if (c != '0')
     85 			base = 10;
     86 		else if (ustr[1] == 'x' || ustr[1] == 'X')
     87 			base = 16;
     88 		else
     89 			base = 8;
     90 	/*
     91 	 * for any base > 10, the digits incrementally following
     92 	 *	9 are assumed to be "abc...z" or "ABC...Z"
     93 	 */
     94 	if (!lisalnum(c) || (xx = DIGIT(c)) >= base) {
     95 		/* no number formed */
     96 #if	defined(_KERNEL) && !defined(_BOOT)
     97 		return (EINVAL);
     98 #else	/* _KERNEL && !_BOOT */
     99 		return (0);
    100 #endif	/* _KERNEL && !_BOOT */
    101 	}
    102 	if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') &&
    103 	    isxdigit(ustr[2]))
    104 		c = *(ustr += 2); /* skip over leading "0x" or "0X" */
    105 
    106 	/* this code assumes that abs(LLONG_MIN) >= abs(LLONG_MAX) */
    107 	if (neg)
    108 		limit = LLONG_MIN;
    109 	else
    110 		limit = -LLONG_MAX;
    111 	multmin = limit / (longlong_t)base;
    112 	val = -DIGIT(c);
    113 	for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) {
    114 		/* accumulate neg avoids surprises near LLONG_MAX */
    115 		if (val < multmin)
    116 			goto overflow;
    117 		val *= base;
    118 		if (val < limit + xx)
    119 			goto overflow;
    120 		val -= xx;
    121 		c = *++ustr;
    122 	}
    123 	if (ptr != (const char **)0)
    124 		*ptr = (char *)ustr;
    125 #if	defined(_KERNEL) && !defined(_BOOT)
    126 	*result = neg ? val : -val;
    127 	return (0);
    128 #else	/* _KERNEL && !_BOOT */
    129 	return (neg ? val : -val);
    130 #endif	/* _KERNEL && !_BOOT */
    131 
    132 overflow:
    133 	for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr))
    134 		;
    135 	if (ptr != (const char **)0)
    136 		*ptr = (char *)ustr;
    137 #if	defined(_KERNEL) && !defined(_BOOT)
    138 	return (ERANGE);
    139 #else	/* _KERNEL && !_BOOT */
    140 	errno = ERANGE;
    141 	return (neg ? LLONG_MIN : LLONG_MAX);
    142 #endif	/* _KERNEL && !_BOOT */
    143 }
    144