Accept interfaces where appropriate. (#103)

* Accept interfaces where appropriate.

`Fpdf.RawWriteBuf` only needs an `io.Reader`, it doesn't have to be a `bytes.Buffer`.

The only reason I can see not to do this is to avoid the interface "boxing" if the caller is actually using a `bytes.Buffer`;
however, since eventually this gets into `binary.Read` which takes an `io.Reader` the boxing will happen anyway (and possibly repeatedly if `readByte` gets called a number of times; I didn't bother to check).

* Also use interface for segmentRead

* Use read-only bytes.Reader instead of bytes.Buffer where appropriate.

1 files changed, 1 insertions, 1 deletions

diff --git a/util.go b/util.go
index 149271c..2c8c5bb 100644
--- a/util.go
+++ b/util.go
@@ -93,7 +93,7 @@ func sliceCompress(data []byte) []byte {
 
 // Returns an uncompressed copy of the specified zlib-compressed byte array
 func sliceUncompress(data []byte) (outData []byte, err error) {
-	inBuf := bytes.NewBuffer(data)
+	inBuf := bytes.NewReader(data)
 	r, err := zlib.NewReader(inBuf)
 	defer r.Close()
 	if err == nil {