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df9f41c9 | 1 | /* Helper functions used by strftime/strptime to handle alternate digits. |
f095bb72 | 2 | Copyright (C) 1995-2002, 2008, 2010 Free Software Foundation, Inc. |
df9f41c9 RM |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
df9f41c9 RM |
18 | |
19 | #include "../locale/localeinfo.h" | |
20 | #include <bits/libc-lock.h> | |
21 | #include <stdlib.h> | |
22 | #include <wchar.h> | |
23 | #include <string.h> | |
24 | ||
25 | /* Some of the functions here must not be used while setlocale is called. */ | |
91e32540 | 26 | __libc_rwlock_define (extern, __libc_setlocale_lock attribute_hidden) |
df9f41c9 RM |
27 | |
28 | #define CURRENT(item) (current->values[_NL_ITEM_INDEX (item)].string) | |
29 | #define CURRENT_WSTR(item) \ | |
30 | ((wchar_t *) current->values[_NL_ITEM_INDEX (item)].wstr) | |
31 | ||
32 | static void | |
f095bb72 | 33 | _nl_init_alt_digit (struct __locale_data *current) |
df9f41c9 RM |
34 | { |
35 | struct lc_time_data *data; | |
36 | ||
37 | if (current->private.time == NULL) | |
38 | { | |
39 | current->private.time = malloc (sizeof *current->private.time); | |
40 | if (current->private.time == NULL) | |
41 | return; | |
42 | memset (current->private.time, 0, sizeof *current->private.time); | |
43 | current->private.cleanup = &_nl_cleanup_time; | |
44 | } | |
45 | data = current->private.time; | |
46 | ||
47 | if (! data->alt_digits_initialized) | |
48 | { | |
49 | const char *ptr = CURRENT (ALT_DIGITS); | |
50 | size_t cnt; | |
51 | ||
52 | data->alt_digits_initialized = 1; | |
53 | ||
54 | if (ptr != NULL) | |
55 | { | |
56 | data->alt_digits = malloc (100 * sizeof (const char *)); | |
57 | if (data->alt_digits != NULL) | |
58 | for (cnt = 0; cnt < 100; ++cnt) | |
59 | { | |
60 | data->alt_digits[cnt] = ptr; | |
61 | ||
62 | /* Skip digit format. */ | |
63 | ptr = strchr (ptr, '\0') + 1; | |
64 | } | |
65 | } | |
66 | } | |
67 | ||
68 | } | |
69 | ||
70 | const char * | |
71 | internal_function | |
f095bb72 | 72 | _nl_get_alt_digit (unsigned int number, struct __locale_data *current) |
df9f41c9 RM |
73 | { |
74 | const char *result; | |
75 | ||
76 | if (number >= 100 || CURRENT (ALT_DIGITS)[0] == '\0') | |
77 | return NULL; | |
78 | ||
91e32540 | 79 | __libc_rwlock_wrlock (__libc_setlocale_lock); |
df9f41c9 RM |
80 | |
81 | if (current->private.time == NULL | |
82 | || ! current->private.time->alt_digits_initialized) | |
83 | _nl_init_alt_digit (current); | |
84 | ||
85 | result = ((current->private.time != NULL | |
86 | && current->private.time->alt_digits != NULL) | |
87 | ? current->private.time->alt_digits[number] | |
88 | : NULL); | |
89 | ||
91e32540 | 90 | __libc_rwlock_unlock (__libc_setlocale_lock); |
df9f41c9 RM |
91 | |
92 | return result; | |
93 | } | |
94 | ||
95 | ||
96 | const wchar_t * | |
97 | internal_function | |
f095bb72 | 98 | _nl_get_walt_digit (unsigned int number, struct __locale_data *current) |
df9f41c9 RM |
99 | { |
100 | const wchar_t *result = NULL; | |
101 | struct lc_time_data *data; | |
102 | ||
103 | if (number >= 100 || CURRENT_WSTR (_NL_WALT_DIGITS)[0] == L'\0') | |
104 | return NULL; | |
105 | ||
91e32540 | 106 | __libc_rwlock_wrlock (__libc_setlocale_lock); |
df9f41c9 RM |
107 | |
108 | if (current->private.time == NULL) | |
109 | { | |
110 | current->private.time = malloc (sizeof *current->private.time); | |
111 | if (current->private.time == NULL) | |
112 | goto out; | |
113 | memset (current->private.time, 0, sizeof *current->private.time); | |
114 | current->private.cleanup = &_nl_cleanup_time; | |
115 | } | |
116 | data = current->private.time; | |
117 | ||
118 | if (! data->walt_digits_initialized) | |
119 | { | |
120 | const wchar_t *ptr = CURRENT_WSTR (_NL_WALT_DIGITS); | |
121 | size_t cnt; | |
122 | ||
123 | data->walt_digits_initialized = 1; | |
124 | ||
125 | if (ptr != NULL) | |
126 | { | |
127 | data->walt_digits = malloc (100 * sizeof (const uint32_t *)); | |
128 | if (data->walt_digits != NULL) | |
129 | for (cnt = 0; cnt < 100; ++cnt) | |
130 | { | |
131 | data->walt_digits[cnt] = ptr; | |
132 | ||
133 | /* Skip digit format. */ | |
134 | ptr = wcschr (ptr, L'\0') + 1; | |
135 | } | |
136 | } | |
137 | } | |
138 | ||
139 | if (data->walt_digits != NULL) | |
140 | result = data->walt_digits[number]; | |
141 | ||
142 | out: | |
91e32540 | 143 | __libc_rwlock_unlock (__libc_setlocale_lock); |
df9f41c9 RM |
144 | |
145 | return (wchar_t *) result; | |
146 | } | |
147 | ||
148 | ||
149 | int | |
150 | internal_function | |
f095bb72 | 151 | _nl_parse_alt_digit (const char **strp, struct __locale_data *current) |
df9f41c9 RM |
152 | { |
153 | const char *str = *strp; | |
154 | int result = -1; | |
155 | size_t cnt; | |
156 | size_t maxlen = 0; | |
157 | ||
158 | if (CURRENT_WSTR (_NL_WALT_DIGITS)[0] == L'\0') | |
159 | return result; | |
160 | ||
91e32540 | 161 | __libc_rwlock_wrlock (__libc_setlocale_lock); |
df9f41c9 RM |
162 | |
163 | if (current->private.time == NULL | |
164 | || ! current->private.time->alt_digits_initialized) | |
165 | _nl_init_alt_digit (current); | |
166 | ||
167 | if (current->private.time != NULL && | |
168 | current->private.time->alt_digits != NULL) | |
169 | /* Matching is not unambiguous. The alternative digits could be like | |
170 | I, II, III, ... and the first one is a substring of the second | |
171 | and third. Therefore we must keep on searching until we found | |
172 | the longest possible match. Note that this is not specified in | |
173 | the standard. */ | |
174 | for (cnt = 0; cnt < 100; ++cnt) | |
175 | { | |
176 | const char *const dig = current->private.time->alt_digits[cnt]; | |
177 | size_t len = strlen (dig); | |
178 | ||
179 | if (len > maxlen && strncmp (dig, str, len) == 0) | |
180 | { | |
181 | maxlen = len; | |
182 | result = (int) cnt; | |
183 | } | |
184 | } | |
185 | ||
91e32540 | 186 | __libc_rwlock_unlock (__libc_setlocale_lock); |
df9f41c9 RM |
187 | |
188 | if (result != -1) | |
189 | *strp += maxlen; | |
190 | ||
191 | return result; | |
192 | } |