#include "git-compat-util.h"
#include "gettext.h"
+#include "strbuf.h"
+#include "utf8.h"
+#ifndef NO_GETTEXT
+# include <locale.h>
+# include <libintl.h>
+# ifdef HAVE_LIBCHARSET_H
+# include <libcharset.h>
+# else
+# include <langinfo.h>
+# define locale_charset() nl_langinfo(CODESET)
+# endif
+#endif
+
+static const char *charset;
+
+/*
+ * Guess the user's preferred languages from the value in LANGUAGE environment
+ * variable and LC_MESSAGES locale category if NO_GETTEXT is not defined.
+ *
+ * The result can be a colon-separated list like "ko:ja:en".
+ */
+const char *get_preferred_languages(void)
+{
+ const char *retval;
+
+ retval = getenv("LANGUAGE");
+ if (retval && *retval)
+ return retval;
+
+#ifndef NO_GETTEXT
+ retval = setlocale(LC_MESSAGES, NULL);
+ if (retval && *retval &&
+ strcmp(retval, "C") &&
+ strcmp(retval, "POSIX"))
+ return retval;
+#endif
+
+ return NULL;
+}
+
+#ifdef GETTEXT_POISON
int use_gettext_poison(void)
{
static int poison_requested = -1;
poison_requested = getenv("GIT_GETTEXT_POISON") ? 1 : 0;
return poison_requested;
}
+#endif
+
+#ifndef NO_GETTEXT
+static int test_vsnprintf(const char *fmt, ...)
+{
+ char buf[26];
+ int ret;
+ va_list ap;
+ va_start(ap, fmt);
+ ret = vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+ return ret;
+}
+
+static void init_gettext_charset(const char *domain)
+{
+ /*
+ This trick arranges for messages to be emitted in the user's
+ requested encoding, but avoids setting LC_CTYPE from the
+ environment for the whole program.
+
+ This primarily done to avoid a bug in vsnprintf in the GNU C
+ Library [1]. which triggered a "your vsnprintf is broken" error
+ on Git's own repository when inspecting v0.99.6~1 under a UTF-8
+ locale.
+
+ That commit contains a ISO-8859-1 encoded author name, which
+ the locale aware vsnprintf(3) won't interpolate in the format
+ argument, due to mismatch between the data encoding and the
+ locale.
+
+ Even if it wasn't for that bug we wouldn't want to use LC_CTYPE at
+ this point, because it'd require auditing all the code that uses C
+ functions whose semantics are modified by LC_CTYPE.
+
+ But only setting LC_MESSAGES as we do creates a problem, since
+ we declare the encoding of our PO files[2] the gettext
+ implementation will try to recode it to the user's locale, but
+ without LC_CTYPE it'll emit something like this on 'git init'
+ under the Icelandic locale:
+
+ Bj? til t?ma Git lind ? /hlagh/.git/
+
+ Gettext knows about the encoding of our PO file, but we haven't
+ told it about the user's encoding, so all the non-US-ASCII
+ characters get encoded to question marks.
+
+ But we're in luck! We can set LC_CTYPE from the environment
+ only while we call nl_langinfo and
+ bind_textdomain_codeset. That suffices to tell gettext what
+ encoding it should emit in, so it'll now say:
+
+ Bjó til tóma Git lind í /hlagh/.git/
+
+ And the equivalent ISO-8859-1 string will be emitted under a
+ ISO-8859-1 locale.
+
+ With this change way we get the advantages of setting LC_CTYPE
+ (talk to the user in his language/encoding), without the major
+ drawbacks (changed semantics for C functions we rely on).
+
+ However foreign functions using other message catalogs that
+ aren't using our neat trick will still have a problem, e.g. if
+ we have to call perror(3):
+
+ #include <stdio.h>
+ #include <locale.h>
+ #include <errno.h>
+
+ int main(void)
+ {
+ setlocale(LC_MESSAGES, "");
+ setlocale(LC_CTYPE, "C");
+ errno = ENODEV;
+ perror("test");
+ return 0;
+ }
+
+ Running that will give you a message with question marks:
+
+ $ LANGUAGE= LANG=de_DE.utf8 ./test
+ test: Kein passendes Ger?t gefunden
+
+ The vsnprintf bug has been fixed since glibc 2.17.
+
+ Then we could simply set LC_CTYPE from the environment, which would
+ make things like the external perror(3) messages work.
+
+ See t/t0203-gettext-setlocale-sanity.sh's "gettext.c" tests for
+ regression tests.
+
+ 1. http://sourceware.org/bugzilla/show_bug.cgi?id=6530
+ 2. E.g. "Content-Type: text/plain; charset=UTF-8\n" in po/is.po
+ */
+ setlocale(LC_CTYPE, "");
+ charset = locale_charset();
+ bind_textdomain_codeset(domain, charset);
+ /* the string is taken from v0.99.6~1 */
+ if (test_vsnprintf("%.*s", 13, "David_K\345gedal") < 0)
+ setlocale(LC_CTYPE, "C");
+}
+
+void git_setup_gettext(void)
+{
+ const char *podir = getenv("GIT_TEXTDOMAINDIR");
+
+ if (!podir)
+ podir = GIT_LOCALE_PATH;
+ bindtextdomain("git", podir);
+ setlocale(LC_MESSAGES, "");
+ setlocale(LC_TIME, "");
+ init_gettext_charset("git");
+ textdomain("git");
+}
+
+/* return the number of columns of string 's' in current locale */
+int gettext_width(const char *s)
+{
+ static int is_utf8 = -1;
+ if (is_utf8 == -1)
+ is_utf8 = is_utf8_locale();
+
+ return is_utf8 ? utf8_strwidth(s) : strlen(s);
+}
+#endif
+
+int is_utf8_locale(void)
+{
+#ifdef NO_GETTEXT
+ if (!charset) {
+ const char *env = getenv("LC_ALL");
+ if (!env || !*env)
+ env = getenv("LC_CTYPE");
+ if (!env || !*env)
+ env = getenv("LANG");
+ if (!env)
+ env = "";
+ if (strchr(env, '.'))
+ env = strchr(env, '.') + 1;
+ charset = xstrdup(env);
+ }
+#endif
+ return is_encoding_utf8(charset);
+}