From 9d82b0dda1ae42e835ef4bc2c38ac1fd2753b781 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 7 Jul 2006 22:43:32 +0000
Subject: moving utf8 reading function to libavutil

Originally committed as revision 5664 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavutil/common.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'libavutil')

diff --git a/libavutil/common.h b/libavutil/common.h
index 7187c579c9..ffded89a4c 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -503,6 +503,20 @@ static inline int ff_get_fourcc(const char *s){
             level= (level^mask)-mask;
 #endif
 
+#define GET_UTF8(val, GET_BYTE, ERROR)\
+    val= GET_BYTE;\
+    {\
+        int ones= 7 - av_log2(val ^ 255);\
+        if(ones==1)\
+            ERROR\
+        val&= 127>>ones;\
+        while(--ones > 0){\
+            int tmp= GET_BYTE - 128;\
+            if(tmp>>6)\
+                ERROR\
+            val= (val<<6) + tmp;\
+        }\
+    }
 
 #if __CPU__ >= 686 && !defined(RUNTIME_CPUDETECT)
 #define COPY3_IF_LT(x,y,a,b,c,d)\
-- 
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