git

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/*
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 * Copyright (c) 2010 Ævar Arnfjörð Bjarmason
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 */
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#include "git-compat-util.h"
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#include "abspath.h"
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#include "environment.h"
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#include "exec-cmd.h"
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#include "gettext.h"
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#include "utf8.h"
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#ifndef NO_GETTEXT
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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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#ifndef NO_GETTEXT
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__attribute__((format (printf, 1, 2)))
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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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	charset = locale_charset();
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	bind_textdomain_codeset(domain, charset);
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	/*
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	 * Work around an old bug fixed in glibc 2.17 (released on
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	 * 2012-12-24), at the cost of potentially making translated
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	 * messages from external functions like perror() emitted in
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	 * the wrong encoding.
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	 *
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	 * The bug affected e.g. git.git's own 7eb93c89651 ([PATCH]
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	 * Simplify git script, 2005-09-07), which is the origin of
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	 * the "David_K\345gedal" test string.
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	 *
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	 * See a much longer comment added to this file in 5e9637c6297
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	 * (i18n: add infrastructure for translating Git with gettext,
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	 * 2011-11-18) for more details.
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	 */
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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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int git_gettext_enabled = 0;
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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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	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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	git_gettext_enabled = 1;
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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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