From: Max Kellermann <max@duempel.org>
Date: Thu, 18 Sep 2008 11:18:16 +0000 (+0200)
Subject: added support for wide characters
X-Git-Tag: v0.12_alpha1~241
X-Git-Url: https://git.tokkee.org/?a=commitdiff_plain;h=cfa2f7b625ed645257897f94f258832f076ee6b0;p=ncmpc.git

added support for wide characters

This patch was taken from bug 476, author unknown
(http://www.musicpd.org/mantis/view.php?id=476).  It changes the
definition of my_strlen(): instead of returning the number of UTF-8
characters, it counts the number of terminal cells occupied by a
string.
---

diff --git a/src/support.c b/src/support.c
index 949c8dc..ad0f93b 100644
--- a/src/support.c
+++ b/src/support.c
@@ -36,9 +36,19 @@ static gboolean noconvert = TRUE;
 size_t
 my_strlen(const char *str)
 {
-	if (g_utf8_validate(str, -1, NULL))
-		return g_utf8_strlen(str, -1);
-	else
+	if (g_utf8_validate(str, -1, NULL)) {
+		size_t len = g_utf8_strlen(str, -1);
+		size_t width = 0;
+		gunichar c;
+
+		while (len--) {
+			c = g_utf8_get_char(str);
+			width += g_unichar_iswide(c) ? 2 : 1;
+			str += g_unichar_to_utf8(c, NULL);
+		}
+
+		return width;
+	} else
 		return strlen(str);
 }
 
diff --git a/src/support.h b/src/support.h
index b80b9c8..3377f9a 100644
--- a/src/support.h
+++ b/src/support.h
@@ -28,8 +28,11 @@ void charset_init(gboolean disable);
 char *utf8_to_locale(const char *str);
 char *locale_to_utf8(const char *str);
 
-/* number of characters in str */
+/**
+ * Returns the number of terminal cells occupied by this string.
+ */
 size_t my_strlen(const char *str);
+
 /* number of bytes in str */
 size_t my_strsize(char *str);