Squashed 'third_party/git/' content from commit cb71568594
git-subtree-dir: third_party/git git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7
This commit is contained in:
Vincent Ambo
commit
1b593e1ea4
3629 changed files with 1139935 additions and 0 deletions
228
gettext.c
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228
gettext.c
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/*
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* Copyright (c) 2010 Ævar Arnfjörð Bjarmason
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*/
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#include "cache.h"
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#include "exec-cmd.h"
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#include "gettext.h"
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#include "strbuf.h"
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#include "utf8.h"
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#include "config.h"
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#ifndef NO_GETTEXT
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# include <locale.h>
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# include <libintl.h>
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# ifdef GIT_WINDOWS_NATIVE
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static const char *locale_charset(void)
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{
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const char *env = getenv("LC_ALL"), *dot;
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if (!env || !*env)
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env = getenv("LC_CTYPE");
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if (!env || !*env)
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env = getenv("LANG");
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if (!env)
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return "UTF-8";
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dot = strchr(env, '.');
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return !dot ? env : dot + 1;
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}
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# elif defined HAVE_LIBCHARSET_H
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# include <libcharset.h>
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# else
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# include <langinfo.h>
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# define locale_charset() nl_langinfo(CODESET)
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# endif
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#endif
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static const char *charset;
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/*
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* Guess the user's preferred languages from the value in LANGUAGE environment
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* variable and LC_MESSAGES locale category if NO_GETTEXT is not defined.
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*
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* The result can be a colon-separated list like "ko:ja:en".
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*/
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const char *get_preferred_languages(void)
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{
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const char *retval;
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retval = getenv("LANGUAGE");
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if (retval && *retval)
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return retval;
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#ifndef NO_GETTEXT
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retval = setlocale(LC_MESSAGES, NULL);
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if (retval && *retval &&
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strcmp(retval, "C") &&
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strcmp(retval, "POSIX"))
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return retval;
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#endif
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return NULL;
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}
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int use_gettext_poison(void)
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{
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static int poison_requested = -1;
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if (poison_requested == -1)
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poison_requested = git_env_bool("GIT_TEST_GETTEXT_POISON", 0);
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return poison_requested;
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}
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#ifndef NO_GETTEXT
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static int test_vsnprintf(const char *fmt, ...)
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{
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char buf[26];
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int ret;
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va_list ap;
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va_start(ap, fmt);
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ret = vsnprintf(buf, sizeof(buf), fmt, ap);
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va_end(ap);
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return ret;
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}
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static void init_gettext_charset(const char *domain)
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{
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/*
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This trick arranges for messages to be emitted in the user's
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requested encoding, but avoids setting LC_CTYPE from the
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environment for the whole program.
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This primarily done to avoid a bug in vsnprintf in the GNU C
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Library [1]. which triggered a "your vsnprintf is broken" error
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on Git's own repository when inspecting v0.99.6~1 under a UTF-8
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locale.
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That commit contains a ISO-8859-1 encoded author name, which
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the locale aware vsnprintf(3) won't interpolate in the format
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argument, due to mismatch between the data encoding and the
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locale.
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Even if it wasn't for that bug we wouldn't want to use LC_CTYPE at
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this point, because it'd require auditing all the code that uses C
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functions whose semantics are modified by LC_CTYPE.
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But only setting LC_MESSAGES as we do creates a problem, since
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we declare the encoding of our PO files[2] the gettext
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implementation will try to recode it to the user's locale, but
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without LC_CTYPE it'll emit something like this on 'git init'
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under the Icelandic locale:
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Bj? til t?ma Git lind ? /hlagh/.git/
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Gettext knows about the encoding of our PO file, but we haven't
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told it about the user's encoding, so all the non-US-ASCII
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characters get encoded to question marks.
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But we're in luck! We can set LC_CTYPE from the environment
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only while we call nl_langinfo and
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bind_textdomain_codeset. That suffices to tell gettext what
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encoding it should emit in, so it'll now say:
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Bjó til tóma Git lind í /hlagh/.git/
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And the equivalent ISO-8859-1 string will be emitted under a
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ISO-8859-1 locale.
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With this change way we get the advantages of setting LC_CTYPE
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(talk to the user in his language/encoding), without the major
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drawbacks (changed semantics for C functions we rely on).
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However foreign functions using other message catalogs that
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aren't using our neat trick will still have a problem, e.g. if
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we have to call perror(3):
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#include <stdio.h>
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#include <locale.h>
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#include <errno.h>
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int main(void)
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{
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setlocale(LC_MESSAGES, "");
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setlocale(LC_CTYPE, "C");
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errno = ENODEV;
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perror("test");
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return 0;
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}
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Running that will give you a message with question marks:
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$ LANGUAGE= LANG=de_DE.utf8 ./test
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test: Kein passendes Ger?t gefunden
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The vsnprintf bug has been fixed since glibc 2.17.
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Then we could simply set LC_CTYPE from the environment, which would
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make things like the external perror(3) messages work.
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See t/t0203-gettext-setlocale-sanity.sh's "gettext.c" tests for
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regression tests.
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1. http://sourceware.org/bugzilla/show_bug.cgi?id=6530
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2. E.g. "Content-Type: text/plain; charset=UTF-8\n" in po/is.po
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*/
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setlocale(LC_CTYPE, "");
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charset = locale_charset();
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bind_textdomain_codeset(domain, charset);
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/* the string is taken from v0.99.6~1 */
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if (test_vsnprintf("%.*s", 13, "David_K\345gedal") < 0)
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setlocale(LC_CTYPE, "C");
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}
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void git_setup_gettext(void)
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{
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const char *podir = getenv(GIT_TEXT_DOMAIN_DIR_ENVIRONMENT);
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char *p = NULL;
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if (!podir)
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podir = p = system_path(GIT_LOCALE_PATH);
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use_gettext_poison(); /* getenv() reentrancy paranoia */
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if (!is_directory(podir)) {
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free(p);
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return;
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}
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bindtextdomain("git", podir);
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setlocale(LC_MESSAGES, "");
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setlocale(LC_TIME, "");
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init_gettext_charset("git");
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textdomain("git");
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free(p);
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}
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/* return the number of columns of string 's' in current locale */
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int gettext_width(const char *s)
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{
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static int is_utf8 = -1;
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if (is_utf8 == -1)
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is_utf8 = is_utf8_locale();
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return is_utf8 ? utf8_strwidth(s) : strlen(s);
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}
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#endif
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int is_utf8_locale(void)
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{
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#ifdef NO_GETTEXT
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if (!charset) {
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const char *env = getenv("LC_ALL");
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if (!env || !*env)
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env = getenv("LC_CTYPE");
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if (!env || !*env)
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env = getenv("LANG");
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if (!env)
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env = "";
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if (strchr(env, '.'))
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env = strchr(env, '.') + 1;
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charset = xstrdup(env);
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}
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#endif
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return is_encoding_utf8(charset);
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}
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