From c859f0b2dc8825763c3b63163a014435a8cdb3cf Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Sun, 4 Oct 2015 14:24:43 +0200
Subject: intraBlock: Rename Offset to Skip

"Offset" is unclear whether it is an offset from the start of file
or start of block. "Skip" seems much better.
---
 cryptfs/content_test.go    |  4 ++--
 cryptfs/cryptfs_content.go |  6 +++---
 cryptfs/intrablock.go      | 10 +++++-----
 3 files changed, 10 insertions(+), 10 deletions(-)

(limited to 'cryptfs')

diff --git a/cryptfs/content_test.go b/cryptfs/content_test.go
index 8fd33c6..8f1d48b 100644
--- a/cryptfs/content_test.go
+++ b/cryptfs/content_test.go
@@ -25,8 +25,8 @@ func TestSplitRange(t *testing.T) {
 	for _, r := range(ranges) {
 		parts := f.SplitRange(r.offset, r.length)
 		for _, p := range(parts) {
-			if p.Length > DEFAULT_PLAINBS || p.Offset >= DEFAULT_PLAINBS {
-				fmt.Printf("Test fail: n=%d, length=%d, offset=%d\n", p.BlockNo, p.Length, p.Offset)
+			if p.Length > DEFAULT_PLAINBS || p.Skip >= DEFAULT_PLAINBS {
+				fmt.Printf("Test fail: n=%d, length=%d, offset=%d\n", p.BlockNo, p.Length, p.Skip)
 				t.Fail()
 			}
 		}
diff --git a/cryptfs/cryptfs_content.go b/cryptfs/cryptfs_content.go
index ab5ec78..761fef5 100644
--- a/cryptfs/cryptfs_content.go
+++ b/cryptfs/cryptfs_content.go
@@ -112,8 +112,8 @@ func (be *CryptFS) SplitRange(offset uint64, length uint64) []intraBlock {
 
 	for length > 0 {
 		b.BlockNo = offset / be.plainBS
-		b.Offset = offset % be.plainBS
-		b.Length = be.minu64(length, be.plainBS - b.Offset)
+		b.Skip = offset % be.plainBS
+		b.Length = be.minu64(length, be.plainBS - b.Skip)
 		parts = append(parts, b)
 		offset += b.Length
 		length -= b.Length
@@ -187,7 +187,7 @@ func (be *CryptFS) JoinCiphertextRange(blocks []intraBlock) (uint64, uint64) {
 // Crop plaintext that correspons to complete cipher blocks down to what is
 // requested according to "iblocks"
 func (be *CryptFS) CropPlaintext(plaintext []byte, blocks []intraBlock) []byte {
-	offset := blocks[0].Offset
+	offset := blocks[0].Skip
 	last := blocks[len(blocks)-1]
 	length := (last.BlockNo - blocks[0].BlockNo + 1) * be.plainBS
 	var cropped []byte
diff --git a/cryptfs/intrablock.go b/cryptfs/intrablock.go
index 78fd140..552cb3c 100644
--- a/cryptfs/intrablock.go
+++ b/cryptfs/intrablock.go
@@ -3,14 +3,14 @@ package cryptfs
 // intraBlock identifies a part of a file block
 type intraBlock struct {
 	BlockNo uint64  // Block number in file
-	Offset  uint64  // Offset into block plaintext
+	Skip    uint64  // Offset into block plaintext
 	Length  uint64  // Length of data from this block
 	fs    *CryptFS
 }
 
 // isPartial - is the block partial? This means we have to do read-modify-write.
 func (ib *intraBlock) IsPartial() bool {
-	if ib.Offset > 0 || ib.Length < ib.fs.plainBS {
+	if ib.Skip > 0 || ib.Length < ib.fs.plainBS {
 		return true
 	}
 	return false
@@ -31,9 +31,9 @@ func (ib *intraBlock) PlaintextRange() (offset uint64, length uint64) {
 // CropBlock - crop a potentially larger plaintext block down to the relevant part
 func (ib *intraBlock) CropBlock(d []byte) []byte{
 	lenHave := len(d)
-	lenWant := int(ib.Offset+ib.Length)
+	lenWant := int(ib.Skip+ib.Length)
 	if lenHave < lenWant {
-		return d[ib.Offset:lenHave]
+		return d[ib.Skip:lenHave]
 	}
-	return d[ib.Offset:lenWant]
+	return d[ib.Skip:lenWant]
 }
-- 
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