1 /*
2 * Copyright (c) 2010 Ævar Arnfjörð Bjarmason
3 */
4
5 #include "cache.h"
6 #include "exec-cmd.h"
7 #include "gettext.h"
8 #include "strbuf.h"
9 #include "utf8.h"
10 #include "config.h"
11
12 #ifndef NO_GETTEXT
13 # include <locale.h>
14 # include <libintl.h>
15 # ifdef GIT_WINDOWS_NATIVE
16
locale_charset(void)17 static const char *locale_charset(void)
18 {
19 const char *env = getenv("LC_ALL"), *dot;
20
21 if (!env || !*env)
22 env = getenv("LC_CTYPE");
23 if (!env || !*env)
24 env = getenv("LANG");
25
26 if (!env)
27 return "UTF-8";
28
29 dot = strchr(env, '.');
30 return !dot ? env : dot + 1;
31 }
32
33 # elif defined HAVE_LIBCHARSET_H
34 # include <libcharset.h>
35 # else
36 # include <langinfo.h>
37 # define locale_charset() nl_langinfo(CODESET)
38 # endif
39 #endif
40
41 static const char *charset;
42
43 /*
44 * Guess the user's preferred languages from the value in LANGUAGE environment
45 * variable and LC_MESSAGES locale category if NO_GETTEXT is not defined.
46 *
47 * The result can be a colon-separated list like "ko:ja:en".
48 */
get_preferred_languages(void)49 const char *get_preferred_languages(void)
50 {
51 const char *retval;
52
53 retval = getenv("LANGUAGE");
54 if (retval && *retval)
55 return retval;
56
57 #ifndef NO_GETTEXT
58 retval = setlocale(LC_MESSAGES, NULL);
59 if (retval && *retval &&
60 strcmp(retval, "C") &&
61 strcmp(retval, "POSIX"))
62 return retval;
63 #endif
64
65 return NULL;
66 }
67
68 #ifndef NO_GETTEXT
69 __attribute__((format (printf, 1, 2)))
test_vsnprintf(const char * fmt,...)70 static int test_vsnprintf(const char *fmt, ...)
71 {
72 char buf[26];
73 int ret;
74 va_list ap;
75 va_start(ap, fmt);
76 ret = vsnprintf(buf, sizeof(buf), fmt, ap);
77 va_end(ap);
78 return ret;
79 }
80
init_gettext_charset(const char * domain)81 static void init_gettext_charset(const char *domain)
82 {
83 setlocale(LC_CTYPE, "");
84 charset = locale_charset();
85 bind_textdomain_codeset(domain, charset);
86
87 /*
88 * Work around an old bug fixed in glibc 2.17 (released on
89 * 2012-12-24), at the cost of potentially making translated
90 * messages from external functions like perror() emitted in
91 * the wrong encoding.
92 *
93 * The bug affected e.g. git.git's own 7eb93c89651 ([PATCH]
94 * Simplify git script, 2005-09-07), which is the origin of
95 * the "David_K\345gedal" test string.
96 *
97 * See a much longer comment added to this file in 5e9637c6297
98 * (i18n: add infrastructure for translating Git with gettext,
99 * 2011-11-18) for more details.
100 */
101 if (test_vsnprintf("%.*s", 13, "David_K\345gedal") < 0)
102 setlocale(LC_CTYPE, "C");
103 }
104
git_setup_gettext(void)105 void git_setup_gettext(void)
106 {
107 const char *podir = getenv(GIT_TEXT_DOMAIN_DIR_ENVIRONMENT);
108 char *p = NULL;
109
110 if (!podir)
111 podir = p = system_path(GIT_LOCALE_PATH);
112
113 if (!is_directory(podir)) {
114 free(p);
115 return;
116 }
117
118 bindtextdomain("git", podir);
119 setlocale(LC_MESSAGES, "");
120 setlocale(LC_TIME, "");
121 init_gettext_charset("git");
122 textdomain("git");
123
124 free(p);
125 }
126
127 /* return the number of columns of string 's' in current locale */
gettext_width(const char * s)128 int gettext_width(const char *s)
129 {
130 static int is_utf8 = -1;
131 if (is_utf8 == -1)
132 is_utf8 = is_utf8_locale();
133
134 return is_utf8 ? utf8_strwidth(s) : strlen(s);
135 }
136 #endif
137
is_utf8_locale(void)138 int is_utf8_locale(void)
139 {
140 #ifdef NO_GETTEXT
141 if (!charset) {
142 const char *env = getenv("LC_ALL");
143 if (!env || !*env)
144 env = getenv("LC_CTYPE");
145 if (!env || !*env)
146 env = getenv("LANG");
147 if (!env)
148 env = "";
149 if (strchr(env, '.'))
150 env = strchr(env, '.') + 1;
151 charset = xstrdup(env);
152 }
153 #endif
154 return is_encoding_utf8(charset);
155 }
156