gistfile1.txt

~ ⚡ node /tmp/readself.js
contents length = 551
buffer length before write = 551
buffer length after write = 551
not the same
contents
// file start
sys=require("sys");
fs=require("fs");
Buffer=require("buffer").Buffer;
contents=fs.readFileSync(__filename, encoding="utf8"); // ö日本語
sys.puts("contents length = "+contents.length);
b=new Buffer(contents.length);
sys.puts("buffer length before write = " + b.length);
b.utf8Write(contents, 0);  // 0=offset
sys.puts("buffer length after write = " + b.length);
sliceStr=b.utf8Slice(0, b.length);
if (contents != sliceStr) {
  sys.puts("not the same");
  sys.puts("contents\n" + contents);
  sys.puts("buffer\n" + sliceStr);
}
// file end


buffer
// file start
sys=require("sys");
fs=require("fs");
Buffer=require("buffer").Buffer;
contents=fs.readFileSync(__filename, encoding="utf8"); // ö日本語
sys.puts("contents length = "+contents.length);
b=new Buffer(contents.length);
sys.puts("buffer length before write = " + b.length);
b.utf8Write(contents, 0);  // 0=offset
sys.puts("buffer length after write = " + b.length);
sliceStr=b.utf8Slice(0, b.length);
if (contents != sliceStr) {
  sys.puts("not the same");
  sys.puts("contents\n" + contents);
  sys.puts("buffer\n" + sliceStr);
}
// fil

byte length is 558