Add a manual page explaining the format of /etc/manpath.config.
[dragonfly/vkernel-mp.git] / lib / libc / locale / _wcstol.h
blobf4d8bb966c38e566d7f8ee94c1b375e20a2cceb1
1 /* $NetBSD: src/lib/libc/locale/_wcstol.h,v 1.2 2003/08/07 16:43:03 agc Exp $ */
2 /* $DragonFly: src/lib/libc/locale/_wcstol.h,v 1.1 2005/03/16 07:54:41 joerg Exp $ */
4 /*-
5 * Copyright (c) 1990, 1993
6 * The Regents of the University of California. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
32 * Original version ID:
33 * @(#)strtol.c 8.1 (Berkeley) 6/4/93
34 * NetBSD: wcstol.c,v 1.1 2001/09/27 16:30:36 yamt Exp
35 * Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstol.c,v 1.2 2001/09/21 16:11:41 yamt Exp
39 * function template for wcstol, wcstoll and wcstoimax.
41 * parameters:
42 * _FUNCNAME : function name
43 * __INT : return type
44 * __INT_MIN : lower limit of the return type
45 * __INT_MAX : upper limit of the return type
48 __INT
49 _FUNCNAME(const wchar_t *nptr, wchar_t **endptr, int base)
51 const wchar_t *s;
52 __INT acc, cutoff;
53 wint_t wc;
54 int i;
55 int neg, any, cutlim;
57 _DIAGASSERT(nptr != NULL);
58 /* endptr may be NULL */
60 /* check base value */
61 if (base && (base < 2 || base > 36)) {
62 errno = EINVAL;
63 return(0);
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.
71 s = nptr;
72 do {
73 wc = (wchar_t) *s++;
74 } while (iswspace(wc));
75 if (wc == L'-') {
76 neg = 1;
77 wc = *s++;
78 } else {
79 neg = 0;
80 if (wc == L'+')
81 wc = *s++;
83 if ((base == 0 || base == 16) &&
84 wc == L'0' && (*s == L'x' || *s == L'X')) {
85 wc = s[1];
86 s += 2;
87 base = 16;
89 if (base == 0)
90 base = wc == L'0' ? 8 : 10;
93 * See strtol for comments as to the logic used.
95 cutoff = neg ? __INT_MIN : __INT_MAX;
96 cutlim = (int)(cutoff % base);
97 cutoff /= base;
98 if (neg) {
99 if (cutlim > 0) {
100 cutlim -= base;
101 cutoff += 1;
103 cutlim = -cutlim;
105 for (acc = 0, any = 0;; wc = (wchar_t) *s++) {
106 i = __wctoint(wc);
107 if (i == -1)
108 break;
109 if (i >= base)
110 break;
111 if (any < 0)
112 continue;
113 if (neg) {
114 if (acc < cutoff || (acc == cutoff && i > cutlim)) {
115 any = -1;
116 acc = __INT_MIN;
117 errno = ERANGE;
118 } else {
119 any = 1;
120 acc *= base;
121 acc -= i;
123 } else {
124 if (acc > cutoff || (acc == cutoff && i > cutlim)) {
125 any = -1;
126 acc = __INT_MAX;
127 errno = ERANGE;
128 } else {
129 any = 1;
130 acc *= base;
131 acc += i;
135 if (endptr != 0)
136 /* LINTED interface specification */
137 *endptr = (wchar_t *)(any ? s - 1 : nptr);
138 return(acc);