From b296368a0557615cbc3ba19bd21965d364d44dba Mon Sep 17 00:00:00 2001
From: Gavin Cabbage <gavincabbage@gmail.com>
Date: Sat, 10 Oct 2015 23:58:24 -0400
Subject: [PATCH] removing failed Stat use

---
 controller/hd44780/hd44780_test.go |  2 +-
 host/generic/i2cbus.go             | 12 +++---------
 i2c.go                             |  2 --
 3 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/controller/hd44780/hd44780_test.go b/controller/hd44780/hd44780_test.go
index 9542bf7..eee375d 100644
--- a/controller/hd44780/hd44780_test.go
+++ b/controller/hd44780/hd44780_test.go
@@ -131,7 +131,7 @@ type mockI2CBus struct {
 	closed bool
 }
 
-func (bus *mockI2CBus) ReadBytes(addr byte) ([]byte, error)      { return []byte{0x00}, nil }
+func (bus *mockI2CBus) ReadBytes(addr byte, num int) ([]byte, error)      { return []byte{0x00}, nil }
 func (bus *mockI2CBus) ReadByte(addr byte) (byte, error)                  { return 0x00, nil }
 func (bus *mockI2CBus) WriteBytes(addr byte, value []byte) error          { return nil }
 func (bus *mockI2CBus) ReadFromReg(addr, reg byte, value []byte) error    { return nil }
diff --git a/host/generic/i2cbus.go b/host/generic/i2cbus.go
index 63b6eb1..45c5870 100644
--- a/host/generic/i2cbus.go
+++ b/host/generic/i2cbus.go
@@ -101,7 +101,7 @@ func (b *i2cBus) ReadByte(addr byte) (byte, error) {
 	return bytes[0], nil
 }
 
-func (b *i2cBus) ReadBytes(addr byte) ([]byte, error) {
+func (b *i2cBus) ReadBytes(addr byte, num int) ([]byte, error) {
 	b.mu.Lock()
 	defer b.mu.Unlock()
 
@@ -113,16 +113,10 @@ func (b *i2cBus) ReadBytes(addr byte) ([]byte, error) {
 		return []byte{0}, err
 	}
 
-	info, err := b.file.Stat()
-	if err != nil {
-		return []byte{0}, err
-	}
-
-	size := int(info.Size())
-	bytes := make([]byte, size)
+	bytes := make([]byte, num)
 	n, _ := b.file.Read(bytes)
 
-	if n != size {
+	if n != num {
 		return []byte{0}, fmt.Errorf("i2c: Unexpected number (%v) of bytes read", n)
 	}
 
diff --git a/i2c.go b/i2c.go
index f0c79da..6a5d1ec 100644
--- a/i2c.go
+++ b/i2c.go
@@ -4,8 +4,6 @@ package embd
 
 // I2CBus interface is used to interact with the I2C bus.
 type I2CBus interface {
-	// ReadBytes reads a slice of bytes from the given address.
-	ReadBytes(addr byte) (value []byte, err error)
 	// ReadByte reads a byte from the given address.
 	ReadByte(addr byte) (value byte, err error)
 	// ReadBytes reads a slice of bytes from the given address.