gdb - Local mods (compile)
[dragonfly.git] / lib / libc / stdlib / _strtoul.h
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1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * Original version ID:
30 * $NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp $
31 */
32
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33#define _LOCALE_NAME(func) func ## _l
34#define _MAKE_LOCALE_NAME(func) _LOCALE_NAME(func)
35#define _FUNCNAME_L _MAKE_LOCALE_NAME(_FUNCNAME)
36
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37/*
38 * function template for strtoul, strtoull and strtoumax.
39 *
40 * parameters:
41 * _FUNCNAME : function name
42 * __UINT : return type
43 * __UINT_MAX : upper limit of the return type
44 */
45
46__UINT
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47_FUNCNAME_L(const char * __restrict nptr, char ** __restrict endptr, int base,
48 locale_t locale)
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49{
50 const char *s;
51 __UINT acc, cutoff;
52 char c;
53 int i, neg, any, cutlim;
54
55 _DIAGASSERT(nptr != NULL);
56 /* endptr may be NULL */
57
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58 FIX_LOCALE(locale);
59
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60 /* check base value */
61 if (base && (base < 2 || base > 36)) {
62 errno = EINVAL;
63 return(0);
64 }
65
66 /*
67 * Skip white space and pick up leading +/- sign if any.
68 * If base is 0, allow 0x for hex and 0 for octal, else
69 * assume decimal; if base is already 16, allow 0x.
70 */
71 s = nptr;
72 do {
73 c = *s++;
dd5515b8 74 } while (isspace_l((unsigned char)c, locale));
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75 if (c == '-') {
76 neg = 1;
77 c = *s++;
78 } else {
79 neg = 0;
80 if (c == '+')
81 c = *s++;
82 }
83 if ((base == 0 || base == 16) &&
84 c == '0' && (*s == 'x' || *s == 'X')) {
85 c = s[1];
86 s += 2;
87 base = 16;
88 }
89 if (base == 0)
90 base = c == '0' ? 8 : 10;
91
92 /*
93 * See strtol for comments as to the logic used.
94 */
95 cutoff = __UINT_MAX / (__UINT)base;
96 cutlim = (int)(__UINT_MAX % (__UINT)base);
97 for (acc = 0, any = 0;; c = *s++) {
98 if (!isascii(c))
99 break;
100 if (isdigit(c))
101 i = c - '0';
102 else if (isalpha(c))
103 i = c - (isupper(c) ? 'A' - 10 : 'a' - 10);
104 else
105 break;
106 if (i >= base)
107 break;
108 if (any < 0)
109 continue;
110 if (acc > cutoff || (acc == cutoff && i > cutlim)) {
111 any = -1;
112 acc = __UINT_MAX;
113 errno = ERANGE;
114 } else {
115 any = 1;
116 acc *= (__UINT)base;
117 acc += i;
118 }
119 }
120 if (neg && any > 0)
121 acc = -acc;
678e8cc6 122 if (endptr != NULL)
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123 /* LINTED interface specification */
124 *endptr = __DECONST(char *, (any ? s - 1 : nptr));
125 return(acc);
126}
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127
128
129__UINT
130_FUNCNAME(const char * __restrict nptr, char ** __restrict endptr, int base)
131{
132 return _FUNCNAME_L(nptr, endptr, base, __get_locale());
133}