1 #include <locale.h>
2 #include <string.h>
3 #include <sys/mman.h>
4 #include <stdlib.h>
5 #include "locale_impl.h"
6 #include "libc.h"
7 #include "lock.h"
8 #include "fork_impl.h"
9
10 #define malloc __libc_malloc
11 #define calloc undef
12 #define realloc undef
13 #define free undef
14
__lctrans_impl(const char * msg,const struct __locale_map * lm)15 const char *__lctrans_impl(const char *msg, const struct __locale_map *lm)
16 {
17 const char *trans = 0;
18 if (lm) trans = __mo_lookup(lm->map, lm->map_size, msg);
19 return trans ? trans : msg;
20 }
21
22 #ifndef __LITEOS__
23 static const char envvars[][18] = {
24 "LC_CTYPE",
25 "LC_NUMERIC",
26 "LC_TIME",
27 "LC_COLLATE",
28 "LC_MONETARY",
29 "LC_MESSAGES",
30 "LC_PAPER",
31 "LC_NAME",
32 "LC_ADDRESS",
33 "LC_TELEPHONE",
34 "LC_MEASUREMENT",
35 "LC_IDENTIFICATION",
36 };
37 #else
38 static const char envvars[][12] = {
39 "LC_CTYPE",
40 "LC_NUMERIC",
41 "LC_TIME",
42 "LC_COLLATE",
43 "LC_MONETARY",
44 "LC_MESSAGES",
45 };
46 #endif
47
48 volatile int __locale_lock[1];
49 volatile int *const __locale_lockptr = __locale_lock;
50
51 #ifdef FEATURE_ICU_LOCALE
52 static const char *g_valid_locale_table[] = {"zh_CN", "zh_CN.UTF-8", "en_US.UTF-8"};
53 static int g_locale_table_size = sizeof(g_valid_locale_table) / sizeof(g_valid_locale_table[0]);
54 #endif
55
__get_locale(int cat,const char * val)56 const struct __locale_map *__get_locale(int cat, const char *val)
57 {
58 static void *volatile loc_head;
59 const struct __locale_map *p;
60 struct __locale_map *new = 0;
61 const char *path = 0, *z;
62 char buf[256];
63 size_t l, n;
64
65 if (!*val) {
66 (val = getenv("LC_ALL")) && *val ||
67 (val = getenv(envvars[cat])) && *val ||
68 (val = getenv("LANG")) && *val ||
69 (val = "C.UTF-8");
70 }
71
72 /* Limit name length and forbid leading dot or any slashes. */
73 for (n=0; n<LOCALE_NAME_MAX && val[n] && val[n]!='/'; n++);
74 if (val[0]=='.' || val[n]) val = "C.UTF-8";
75 int builtin = (val[0]=='C' && !val[1])
76 #ifndef __LITEOS__
77 || !strcmp(val, "POSIX")
78 || !strcmp(val, "en_US");
79 #else
80 || !strcmp(val, "C.UTF-8")
81 || !strcmp(val, "POSIX");
82 #endif
83
84 if (builtin) {
85 if (cat == LC_CTYPE && val[1]=='.')
86 return (void *)&__c_dot_utf8;
87 return 0;
88 }
89
90 for (p=loc_head; p; p=p->next)
91 if (!strcmp(val, p->name)) return p;
92
93 if (!strcmp(val, "en_US.UTF-8") || !strcmp(val, "C.UTF-8")) {
94 /* If no locale definition was found, make a locale map
95 * object anyway to store the name, which is kept for the
96 * sake of being able to do message translations at the
97 * application level. */
98 if (!new && (new = malloc(sizeof *new))) {
99 new->map = __c_dot_utf8.map;
100 new->map_size = __c_dot_utf8.map_size;
101 memcpy(new->name, val, n);
102 new->name[n] = 0;
103 new->next = loc_head;
104 if (strcmp(val, "en_US.UTF-8") == 0) {
105 new->flag = ICU_VALID;
106 } else {
107 new->flag = VALID;
108 }
109 loc_head = new;
110 }
111 }
112
113 if (!libc.secure) path = getenv("MUSL_LOCPATH");
114 /* FIXME: add a default path? */
115
116 if (path) for (; *path; path=z+!!*z) {
117 z = __strchrnul(path, ':');
118 l = z - path;
119 if (l >= sizeof buf - n - 2) continue;
120 memcpy(buf, path, l);
121 buf[l] = '/';
122 memcpy(buf+l+1, val, n);
123 buf[l+1+n] = 0;
124 size_t map_size;
125 const void *map = __map_file(buf, &map_size);
126 if (map) {
127 new = malloc(sizeof *new);
128 if (!new) {
129 __munmap((void *)map, map_size);
130 break;
131 }
132 new->map = map;
133 new->map_size = map_size;
134 memcpy(new->name, val, n);
135 new->name[n] = 0;
136 new->next = loc_head;
137 new->flag = VALID;
138 loc_head = new;
139 break;
140 }
141 }
142
143 /* If no locale definition was found, make a locale map
144 * object anyway to store the name, which is kept for the
145 * sake of being able to do message translations at the
146 * application level. */
147 if (!new && (new = malloc(sizeof *new))) {
148 new->map = __c_dot_utf8.map;
149 new->map_size = __c_dot_utf8.map_size;
150 memcpy(new->name, val, n);
151 new->name[n] = 0;
152 new->next = loc_head;
153 new->flag = INVALID;
154 loc_head = new;
155 }
156
157 #ifdef FEATURE_ICU_LOCALE
158 /* For locales with no definition, checks whether this locale setting
159 * is valid for icu. We use a table to record all the valid icu locale
160 * settings. */
161 if (new->flag == INVALID) {
162 for (int i = 0; i < g_locale_table_size; i++) {
163 if (strcmp(g_valid_locale_table[i], val) == 0) {
164 new->flag = ICU_VALID;
165 break;
166 }
167 }
168 }
169 /* Use ICU_VALID flag to indicate that other icu-related functions can use icu methods */
170 if (new->flag == ICU_VALID) {
171 /* ICU function: u_setDataDirectory, Load ICU data to memory */
172 set_icu_directory();
173 }
174 #endif
175
176 /* For LC_CTYPE, never return a null pointer unless the
177 * requested name was "C" or "POSIX". */
178 if (!new && cat == LC_CTYPE) new = (void *)&__c_dot_utf8;
179
180 return new;
181 }
182