int * nOut){
  const unsigned char *z;
  char *zOut;
  u32 c;
  int n, i, j;
  z = (const unsigned char*)zStr;
  n = 0;
  while( (c = fossil_utf8_read(&z))!=0 ){
  while( (c = *(z++))!=0 ){
    if( c=='\\' || c=='"' ){
      n += 2;
    }else if( c<' ' || c>=0x7f ){
    }else if( c<' ' ){
      if( c=='\n' || c=='\r' ){
        n += 2;
      }else{
        n += 6;
      }
    }else{
      n++;
    }
  }
  if(fAddQuotes){
    n += 2;
  }
  zOut = fossil_malloc(n+1);
  if( zOut==0 ) return 0;
  z = (const unsigned char*)zStr;
  i = 0;
  if(fAddQuotes){
    zOut[i++] = '"';
  }
  while( (c = fossil_utf8_read(&z))!=0 ){
  while( (c = *(z++))!=0 ){
    if( c=='\\' || c=='"' ){
      zOut[i++] = '\\';
      zOut[i++] = c;
    }else if( c<' ' || c>=0x7f ){
    }else if( c<' ' ){
      zOut[i++] = '\\';
      if( c=='\n' ){
        zOut[i++] = 'n';
      }else if( c=='\r' ){
        zOut[i++] = 'r';
      }else{
        zOut[i++] = 'u';