[PATCH v2 6/9] gettext: add is_utf8_locale()

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

This function returns true if git is running under an UTF-8
locale. pcre in the next patch will need this.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 gettext.c | 7 ++++++-
 gettext.h | 5 +++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/gettext.c b/gettext.c
index 7378ba2..601bc80 100644
--- a/gettext.c
+++ b/gettext.c
@@ -166,12 +166,17 @@ void git_setup_gettext(void)
 	textdomain("git");
 }
 
+int is_utf8_locale(void)
+{
+	return !strcmp(charset, "UTF-8");
+}
+
 /* 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 = !strcmp(charset, "UTF-8");
+		is_utf8 = is_utf8_locale();
 
 	return is_utf8 ? utf8_strwidth(s) : strlen(s);
 }
diff --git a/gettext.h b/gettext.h
index 33696a4..5e733d4 100644
--- a/gettext.h
+++ b/gettext.h
@@ -31,6 +31,7 @@
 #ifndef NO_GETTEXT
 extern void git_setup_gettext(void);
 extern int gettext_width(const char *s);
+extern int is_utf8_locale(void);
 #else
 static inline void git_setup_gettext(void)
 {
@@ -39,6 +40,10 @@ static inline int gettext_width(const char *s)
 {
 	return strlen(s);
 }
+static inline int is_utf8_locale(void)
+{
+	return 0;
+}
 #endif
 
 #ifdef GETTEXT_POISON
-- 
2.3.0.rc1.137.g477eb31