latinToUTF8 wrong buffLength

and not convert range 0xD0...0xDF   char "ß"

src/Audio.cpp

@@ -3,8 +3,8 @@
  *
  *  Created on: Oct 26.2018
  *
- *  Version 3.0.9j
- *  Updated on: Apr 28.2024
+ *  Version 3.0.9k
+ *  Updated on: May 04.2024
  *      Author: Wolle (schreibfaul1)
  *
  */
@@ -1163,56 +1163,35 @@ bool Audio::latinToUTF8(char* buff, size_t bufflen) {
     // converted to UTF-8. If UTF-8 is already present, nothing is done and true is returned.
     // A conversion to UTF-8 extends the string. Therefore it is necessary to know the buffer size. If the converted
     // string does not fit into the buffer, false is returned
-    // utf8 bytelength: >=0xF0 3 bytes, >=0xE0 2 bytes, >=0xC0 1 byte, e.g. e293ab is ⓫
 
-    uint16_t pos = 0;
-    uint8_t  ext_bytes = 0;
-    uint16_t len = strlen(buff);
-    uint8_t  c;
-
-    while(pos < len - 2) {
-        c = buff[pos];
-        if(c >= 0xC2) { // is UTF8 char
-            pos++;
-            if(c >= 0xC0 && buff[pos] < 0x80) {
-                ext_bytes++;
-                pos++;
-            }
-            if(c >= 0xE0 && buff[pos] < 0x80) {
-                ext_bytes++;
-                pos++;
-            }
-            if(c >= 0xF0 && buff[pos] < 0x80) {
-                ext_bytes++;
-                pos++;
-            }
-        }
-        else pos++;
-    }
-    if(!ext_bytes) return true; // is UTF-8, do nothing
+    uint16_t in = 0;
+    uint16_t out = 0;
 
-    pos = 0;
+    char* iso8859_1 = x_strdup(buff);
 
-    while(buff[pos] != 0) {
-        if((buff[pos] & 0x80) == 0) {
-            pos++;
-            continue;
-        }
-        else {
-            len = strlen(buff);
-            for(int i = len + 1; i > pos; i--) { buff[i + 1] = buff[i]; }
-            uint8_t c = buff[pos];
-            buff[pos] = 0xc0 | ((c >> 6) & 0x1f); // 2+1+5 bits
-            pos++;
-            buff[pos] = 0x80 | ((char)c & 0x3f); // 1+1+6 bits
+    while(iso8859_1[in] != '\0'){
+        if(iso8859_1[in] < 0x80){
+            buff[out] = iso8859_1[in];
+            out++;
+            in++;
+            if(out > bufflen) goto exit;
         }
-        pos++;
-        if(pos > bufflen - 3) {
-            buff[bufflen - 1] = '\0';
-            return false; // do not overwrite
+        else{
+            buff[out] = (0xC0 | iso8859_1[in] >> 6);
+            out++;
+            if(out + 1 > bufflen) goto exit;
+            buff[out] = (0x80 | (iso8859_1[in] & 0x3F));
+            out++;
+            in++;
         }
     }
+    buff[out] = '\0';
+    if(iso8859_1) {free(iso8859_1); iso8859_1 = NULL;}
     return true;
+
+exit:
+    if(iso8859_1) {free(iso8859_1); iso8859_1 = NULL;}
+    return false;
 }
 //------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 size_t Audio::readAudioHeader(uint32_t bytes) {
@@ -1800,7 +1779,7 @@ int Audio::read_ID3_Header(uint8_t* data, size_t len) {
                 j++;
             }
             m_ibuff[k] = '\0'; // new termination
-            latinToUTF8(m_ibuff, k - 1);
+            latinToUTF8(m_ibuff, m_ibuffSize);
         }
         showID3Tag(tag, m_ibuff);
         return fs;

src/Audio.h

@@ -3,8 +3,8 @@
  *
  *  Created on: Oct 28,2018
  *
- *  Version 3.0.9j
- *  Updated on: Apr 28.2024
+ *  Version 3.0.9k
+ *  Updated on: May 04.2024
  *      Author: Wolle (schreibfaul1)
  */