[apple/boot.git] / i386 / libsa / strtol.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.1 (the "License").  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*-
 * 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. 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.
 */

/*      Copyright (c) 1995 NeXT Computer, Inc.  All rights reserved.
 *
 * HISTORY
 * 	Modified by Curtis Galloway at NeXT June 1993,
 * 	for use in the standalone library.
 *
 * 30-Nov-1995    Dean Reece at NeXT
 *      Created based on BSD4.4's strtol.c & strtoul.c.
 *      Removed dependency on _ctype_ by static versions of isupper()...
 *      Added support for "0b101..." binary constants.
 *      Commented out references to errno.
 */
 
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strtol.c	5.4 (Berkeley) 2/23/91";
#endif /* LIBC_SCCS and not lint */

#include "libsa.h"
#include <limits.h>

static inline int
isupper(char c)
{
    return (c >= 'A' && c <= 'Z');
}

static inline int
islower(char c)
{
    return (c >= 'a' && c <= 'z');
}

static inline int
isalpha(char c)
{
    return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
}

static inline int
isspace(char c)
{
    return (c == ' ' || c == '\t' || c == '\n' || c == '\12');
}

static inline int
isdigit(char c)
{
    return (c >= '0' && c <= '9');
}


/*
 * Convert a string to a long integer.
 *
 * Ignores `locale' stuff.  Assumes that the upper and lower case
 * alphabets and digits are each contiguous.
 */
long
strtol(nptr, endptr, base)
	const char *nptr;
	char **endptr;
	register int base;
{
	register const char *s = nptr;
	register unsigned long acc;
	register int c;
	register unsigned long 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 (isspace(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;
	} else if ((base == 0 || base == 2) &&
	    c == '0' && (*s == 'b' || *s == 'B')) {
		c = s[1];
		s += 2;
		base = 2;
	}
	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 ? -(unsigned long)LONG_MIN : LONG_MAX;
	cutlim = cutoff % (unsigned long)base;
	cutoff /= (unsigned long)base;
	for (acc = 0, any = 0;; c = *s++) {
		if (isdigit(c))
			c -= '0';
		else if (isalpha(c))
			c -= isupper(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 ? LONG_MIN : LONG_MAX;
//		errno = ERANGE;
	} else if (neg)
		acc = -acc;
	if (endptr != 0)
		*endptr = (char *)(any ? s - 1 : nptr);
	return (acc);
}


/*
 * Convert a string to an unsigned long integer.
 *
 * Ignores `locale' stuff.  Assumes that the upper and lower case
 * alphabets and digits are each contiguous.
 */
unsigned long
strtoul(nptr, endptr, base)
	const char *nptr;
	char **endptr;
	register int base;
{
	register const char *s = nptr;
	register unsigned long acc;
	register int c;
	register unsigned long cutoff;
	register int neg = 0, any, cutlim;

	/*
	 * See strtol for comments as to the logic used.
	 */
	do {
		c = *s++;
	} while (isspace(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;
	} else if ((base == 0 || base == 2) &&
	    c == '0' && (*s == 'b' || *s == 'B')) {
		c = s[1];
		s += 2;
		base = 2;
	}
	if (base == 0)
		base = c == '0' ? 8 : 10;
	cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
	cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
	for (acc = 0, any = 0;; c = *s++) {
		if (isdigit(c))
			c -= '0';
		else if (isalpha(c))
			c -= isupper(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 = ULONG_MAX;
//		errno = ERANGE;
	} else if (neg)
		acc = -acc;
	if (endptr != 0)
		*endptr = (char *)(any ? s - 1 : nptr);
	return (acc);
}
Commit	Line	Data
14c7c974 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 1.1 (the "License"). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License.
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*-
	25	* Copyright (c) 1990, 1993
	26	* The Regents of the University of California. All rights reserved.
	27	*
	28	* Redistribution and use in source and binary forms, with or without
	29	* modification, are permitted provided that the following conditions
	30	* are met:
	31	* 1. Redistributions of source code must retain the above copyright
	32	* notice, this list of conditions and the following disclaimer.
	33	* 2. Redistributions in binary form must reproduce the above copyright
	34	* notice, this list of conditions and the following disclaimer in the
	35	* documentation and/or other materials provided with the distribution.
	36	* 3. All advertising materials mentioning features or use of this software
	37	* must display the following acknowledgement:
	38	* This product includes software developed by the University of
	39	* California, Berkeley and its contributors.
	40	* 4. Neither the name of the University nor the names of its contributors
	41	* may be used to endorse or promote products derived from this software
	42	* without specific prior written permission.
	43	*
	44	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	45	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	46	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	47	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	48	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	49	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	50	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	51	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	52	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	53	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	54	* SUCH DAMAGE.
	55	*/
	56
	57	/* Copyright (c) 1995 NeXT Computer, Inc. All rights reserved.
	58	*
	59	* HISTORY
	60	* Modified by Curtis Galloway at NeXT June 1993,
	61	* for use in the standalone library.
	62	*
	63	* 30-Nov-1995 Dean Reece at NeXT
	64	* Created based on BSD4.4's strtol.c & strtoul.c.
65	* Removed dependency on _ctype_ by static versions of isupper()...
66	* Added support for "0b101..." binary constants.
67	* Commented out references to errno.
68	*/
69
70	#if defined(LIBC_SCCS) && !defined(lint)
71	static char sccsid[] = "@(#)strtol.c 5.4 (Berkeley) 2/23/91";
72	#endif /* LIBC_SCCS and not lint */
73
74	#include "libsa.h"
75	#include <limits.h>
76
77	static inline int
78	isupper(char c)
79	{
80	return (c >= 'A' && c <= 'Z');
81	}
82
83	static inline int
84	islower(char c)
85	{
86	return (c >= 'a' && c <= 'z');
87	}
88
89	static inline int
90	isalpha(char c)
91	{
92	return ((c >= 'A' && c <= 'Z') \|\| (c >= 'a' && c <= 'z'));
93	}
94
95	static inline int
96	isspace(char c)
97	{
98	return (c == ' ' \|\| c == '\t' \|\| c == '\n' \|\| c == '\12');
99	}
100
101	static inline int
102	isdigit(char c)
103	{
104	return (c >= '0' && c <= '9');
105	}
106
107
108	/*
109	* Convert a string to a long integer.
110	*
111	* Ignores `locale' stuff. Assumes that the upper and lower case
112	* alphabets and digits are each contiguous.
113	*/
114	long
115	strtol(nptr, endptr, base)
116	const char *nptr;
117	char **endptr;
118	register int base;
119	{
120	register const char *s = nptr;
121	register unsigned long acc;
122	register int c;
123	register unsigned long cutoff;
124	register int neg = 0, any, cutlim;
125
126	/*
127	* Skip white space and pick up leading +/- sign if any.
128	* If base is 0, allow 0x for hex and 0 for octal, else
129	* assume decimal; if base is already 16, allow 0x.
130	*/
131	do {
132	c = *s++;
133	} while (isspace(c));
134	if (c == '-') {
135	neg = 1;
136	c = *s++;
137	} else if (c == '+')
138	c = *s++;
139	if ((base == 0 \|\| base == 16) &&
140	c == '0' && (s == 'x' \|\| s == 'X')) {
141	c = s[1];
142	s += 2;
143	base = 16;
144	} else if ((base == 0 \|\| base == 2) &&
145	c == '0' && (s == 'b' \|\| s == 'B')) {
146	c = s[1];
147	s += 2;
148	base = 2;
149	}
150	if (base == 0)
151	base = c == '0' ? 8 : 10;
152
153	/*
154	* Compute the cutoff value between legal numbers and illegal
155	* numbers. That is the largest legal value, divided by the
156	* base. An input number that is greater than this value, if
157	* followed by a legal input character, is too big. One that
158	* is equal to this value may be valid or not; the limit
159	* between valid and invalid numbers is then based on the last
160	* digit. For instance, if the range for longs is
161	* [-2147483648..2147483647] and the input base is 10,
162	* cutoff will be set to 214748364 and cutlim to either
163	* 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
164	* a value > 214748364, or equal but the next digit is > 7 (or 8),
165	* the number is too big, and we will return a range error.
166	*
167	* Set any if any `digits' consumed; make it negative to indicate
168	* overflow.
169	*/
170	cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX;
171	cutlim = cutoff % (unsigned long)base;
172	cutoff /= (unsigned long)base;
173	for (acc = 0, any = 0;; c = *s++) {
174	if (isdigit(c))
175	c -= '0';
176	else if (isalpha(c))
177	c -= isupper(c) ? 'A' - 10 : 'a' - 10;
178	else
179	break;
180	if (c >= base)
181	break;
182	if (any < 0 \|\| acc > cutoff \|\| acc == cutoff && c > cutlim)
183	any = -1;
184	else {
185	any = 1;
186	acc *= base;
187	acc += c;
188	}
189	}
190	if (any < 0) {
191	acc = neg ? LONG_MIN : LONG_MAX;
192	// errno = ERANGE;
193	} else if (neg)
194	acc = -acc;
195	if (endptr != 0)
196	endptr = (char )(any ? s - 1 : nptr);
197	return (acc);
198	}
199
200
201	/*
202	* Convert a string to an unsigned long integer.
203	*
204	* Ignores `locale' stuff. Assumes that the upper and lower case
205	* alphabets and digits are each contiguous.
206	*/
207	unsigned long
208	strtoul(nptr, endptr, base)
209	const char *nptr;
210	char **endptr;
211	register int base;
212	{
213	register const char *s = nptr;
214	register unsigned long acc;
215	register int c;
216	register unsigned long cutoff;
217	register int neg = 0, any, cutlim;
218
219	/*
220	* See strtol for comments as to the logic used.
221	*/
222	do {
223	c = *s++;
224	} while (isspace(c));
225	if (c == '-') {
226	neg = 1;
227	c = *s++;
228	} else if (c == '+')
229	c = *s++;
230	if ((base == 0 \|\| base == 16) &&
231	c == '0' && (s == 'x' \|\| s == 'X')) {
232	c = s[1];
233	s += 2;
234	base = 16;
235	} else if ((base == 0 \|\| base == 2) &&
236	c == '0' && (s == 'b' \|\| s == 'B')) {
237	c = s[1];
238	s += 2;
239	base = 2;
240	}
241	if (base == 0)
242	base = c == '0' ? 8 : 10;
243	cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
244	cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
245	for (acc = 0, any = 0;; c = *s++) {
246	if (isdigit(c))
247	c -= '0';
248	else if (isalpha(c))
249	c -= isupper(c) ? 'A' - 10 : 'a' - 10;
250	else
251	break;
252	if (c >= base)
253	break;
254	if (any < 0 \|\| acc > cutoff \|\| acc == cutoff && c > cutlim)
255	any = -1;
256	else {
257	any = 1;
258	acc *= base;
259	acc += c;
260	}
261	}
262	if (any < 0) {
263	acc = ULONG_MAX;
264	// errno = ERANGE;
265	} else if (neg)
266	acc = -acc;
267	if (endptr != 0)
268	endptr = (char )(any ? s - 1 : nptr);
269	return (acc);
270	}