lib/file: add a `from` parameter on `write_native` and `io_write`

[nit.git] / lib / standard / file.nit

diff --git a/lib/standard/file.nit b/lib/standard/file.nit
index cc6711c..2d4e9df 100644 (file)
--- a/lib/standard/file.nit
+++ b/lib/standard/file.nit
@@ -185,7 +185,7 @@ class FileWriter
                        last_error = new IOError("cannot write to non-writable stream")
                        return
                end
-               write_native(s.items, s.length)
+               write_native(s.items, 0, s.length)
        end
 
        redef fun write(s)
@@ -226,7 +226,7 @@ class FileWriter
        redef var is_writable = false
 
        # Write `len` bytes from `native`.
-       private fun write_native(native: NativeString, len: Int)
+       private fun write_native(native: NativeString, from, len: Int)
        do
                if last_error != null then return
                if not _is_writable then
@@ -238,7 +238,7 @@ class FileWriter
                        _is_writable = false
                        return
                end
-               var err = _file.io_write(native, len)
+               var err = _file.io_write(native, from, len)
                if err != len then
                        # Big problem
                        last_error = new IOError("Problem in writing : {err} {len} \n")
@@ -1160,8 +1160,8 @@ private extern class NativeFile `{ FILE* `}
                return fread(buf, 1, len, self);
        `}
 
-       fun io_write(buf: NativeString, len: Int): Int `{
-               return fwrite(buf, 1, len, self);
+       fun io_write(buf: NativeString, from, len: Int): Int `{
+               return fwrite(buf+from, 1, len, self);
        `}
 
        fun write_byte(value: Byte): Int `{