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 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1986 AT&T */
28 /* All Rights Reserved */
29
30 #ifndef _WCS_LONGLONG
31 #pragma weak _wcstol = wcstol
32 #endif
33
34 #include "lint.h"
35 #include <limits.h>
36 #include <errno.h>
37 #include <wchar.h>
38 #define DIGIT(x) (iswdigit(x) ? (x) - L'0' : \
39 iswlower(x) ? (x) + 10 - L'a' : (x) + 10 - L'A')
40 #define MBASE (L'z' - L'a' + 1 + 10)
41
42 #ifdef _WCS_LONGLONG
43 #define _WLONG_T long long
44 #define _WLONG_MAX LLONG_MAX
45 #define _WLONG_MIN LLONG_MIN
46 #else /* _WCS_LONGLONG */
47 #define _WLONG_T long
48 #define _WLONG_MAX LONG_MAX
49 #define _WLONG_MIN LONG_MIN
50 #endif /* _WCS_LONGLONG */
51
52 #ifdef _WCS_LONGLONG
53 long long
wcstoll(const wchar_t * _RESTRICT_KYWD str,wchar_t ** _RESTRICT_KYWD ptr,int base)54 wcstoll(const wchar_t *_RESTRICT_KYWD str, wchar_t **_RESTRICT_KYWD ptr,
55 int base)
56 #else /* _WCS_LONGLONG */
57 long
58 wcstol(const wchar_t *str, wchar_t **ptr, int base)
59 #endif /* _WCS_LONGLONG */
60 {
61 _WLONG_T val;
62 wchar_t c;
63 int xx, neg = 0;
64 _WLONG_T multmin, limit;
65
66 if (ptr != NULL)
67 *ptr = (wchar_t *)str; /* in case no number is formed */
68 if (base < 0 || base > MBASE) {
69 errno = EINVAL;
70 return (0); /* base is invalid -- should be a fatal error */
71 }
72
73 if (!iswalnum(c = *str)) {
74 while (iswspace(c)) {
75 c = *++str;
76 }
77 switch (c) {
78 case L'-':
79 neg++;
80 /*FALLTHRU*/
81 case L'+':
82 c = *++str;
83 }
84 }
85 if (base == 0) {
86 if (c != L'0')
87 base = 10;
88 else if (str[1] == L'x' || str[1] == L'X')
89 base = 16;
90 else
91 base = 8;
92 }
93 /*
94 * for any base > 10, the digits incrementally following
95 * 9 are assumed to be "abc...z" or "ABC...Z"
96 */
97 if (!iswalnum(c) || (xx = DIGIT(c)) >= base) {
98 errno = EINVAL;
99 return (0); /* no number formed */
100 }
101
102 if (base == 16 && c == L'0' && iswxdigit(str[2]) &&
103 (str[1] == L'x' || str[1] == L'X')) {
104 c = *(str += 2); /* skip over leading "0x" or "0X" */
105 }
106
107 if (neg) {
108 limit = _WLONG_MIN;
109 } else {
110 limit = -_WLONG_MAX;
111 }
112 multmin = limit / base;
113
114 val = -DIGIT(c);
115 for (; iswalnum(c = *++str) && (xx = DIGIT(c)) < base; ) {
116 /* accumulate neg avoids surprises near MAXLONG */
117 if (val < multmin)
118 goto overflow;
119 val *= base;
120 if (val < limit + xx)
121 goto overflow;
122 val -= xx;
123 }
124 if (ptr != NULL)
125 *ptr = (wchar_t *)str;
126 return (neg ? val : -val);
127
128 overflow:
129 while (iswalnum(c = *++str) && (xx = DIGIT(c)) < base)
130 ;
131
132 if (ptr != NULL)
133 *ptr = (wchar_t *)str;
134 errno = ERANGE;
135 return (neg ? _WLONG_MIN : _WLONG_MAX);
136 }
137