From 6ca301c3205cf04e4aa37c16e21224223233ea9b Mon Sep 17 00:00:00 2001
From: Marisa-Chan
Date: Sun, 9 Mar 2014 23:19:17 +0700
Subject: ZVISION: Add utf8 char length and utf8->uint16 functions

---
 engines/zvision/text.cpp | 30 ++++++++++++++++++++++++++++++
 engines/zvision/text.h   |  2 ++
 2 files changed, 32 insertions(+)

diff --git a/engines/zvision/text.cpp b/engines/zvision/text.cpp
index e96bf4b32c..2fdfafcdf6 100644
--- a/engines/zvision/text.cpp
+++ b/engines/zvision/text.cpp
@@ -515,5 +515,35 @@ Common::String readWideLine(Common::SeekableReadStream &stream) {
 	return asciiString;
 }
 
+int8 getUtf8CharSize(char chr) {
+	if ((chr & 0x80) == 0)
+		return 1;
+	else if ((chr & 0xE0) == 0xC0)
+		return 2;
+	else if ((chr & 0xF0) == 0xE0)
+		return 3;
+	else if ((chr & 0xF8) == 0xF0)
+		return 4;
+	else if ((chr & 0xFC) == 0xF8)
+		return 5;
+	else if ((chr & 0xFE) == 0xFC)
+		return 6;
+
+	return 1;
+}
+
+uint16 readUtf8Char(const char *chr) {
+	uint16 result = 0;
+	if ((chr[0] & 0x80) == 0)
+		result = chr[0];
+	else if ((chr[0] & 0xE0) == 0xC0)
+		result = ((chr[0] & 0x1F) << 6) | (chr[1] & 0x3F);
+	else if ((chr[0] & 0xF0) == 0xE0)
+		result = ((chr[0] & 0x0F) << 12) | ((chr[1] & 0x3F) << 6) | (chr[2] & 0x3F);
+	else
+		result = chr[0];
+
+	return result;
+}
 
 } // End of namespace ZVision
diff --git a/engines/zvision/text.h b/engines/zvision/text.h
index 6937832335..c1dc0c167c 100644
--- a/engines/zvision/text.h
+++ b/engines/zvision/text.h
@@ -92,6 +92,8 @@ private:
 };
 
 Common::String readWideLine(Common::SeekableReadStream &stream);
+int8 getUtf8CharSize(char chr);
+uint16 readUtf8Char(const char *chr);
 
 } // End of namespace ZVision
 
-- 
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