gettext: add is_utf8_locale()
This function returns true if git is running under an UTF-8
locale. pcre in the next patch will need this.
is_encoding_utf8() is used instead of strcmp() to catch both "utf-8"
and "utf8" suffixes.
When built with no gettext support, we peek in several env variables
to detect UTF-8. pcre library might support utf-8 even if libc is
built without locale support.. The peeking code is a copy from
compat/regex/regcomp.c
Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/gettext.c b/gettext.c
index a268a2c..db727ea 100644
--- a/gettext.c
+++ b/gettext.c
@@ -18,6 +18,8 @@
# 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.
@@ -65,7 +67,6 @@
return ret;
}
-static const char *charset;
static void init_gettext_charset(const char *domain)
{
/*
@@ -172,8 +173,27 @@
{
static int is_utf8 = -1;
if (is_utf8 == -1)
- is_utf8 = !strcmp(charset, "UTF-8");
+ 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);
+}
