[Pkg-javascript-commits] [pdf.js] 65/204: Add peekByte method to Stream, DecodeStream and ChunkedStream

[David Prévot]

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taffit pushed a commit to branch master
in repository pdf.js.

commit d1974eae34bce9e275f1a9c3505012513d7aa45e
Author: Jonas Jenwald <jonas.jenwald at gmail.com>
Date:   Thu Sep 11 16:33:49 2014 +0200

    Add peekByte method to Stream, DecodeStream and ChunkedStream
---
 src/core/chunked_stream.js |  6 ++++++
 src/core/parser.js         |  2 +-
 src/core/stream.js         | 12 +++++++++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/core/chunked_stream.js b/src/core/chunked_stream.js
index 7c2aa5b..9578c79 100644
--- a/src/core/chunked_stream.js
+++ b/src/core/chunked_stream.js
@@ -195,6 +195,12 @@ var ChunkedStream = (function ChunkedStreamClosure() {
       return bytes.subarray(pos, end);
     },
 
+    peekByte: function ChunkedStream_peekByte() {
+      var peekedByte = this.getByte();
+      this.pos--;
+      return peekedByte;
+    },
+
     peekBytes: function ChunkedStream_peekBytes(length) {
       var bytes = this.getBytes(length);
       this.pos -= bytes.length;
diff --git a/src/core/parser.js b/src/core/parser.js
index 8b83c5d..4af57fb 100644
--- a/src/core/parser.js
+++ b/src/core/parser.js
@@ -478,7 +478,7 @@ var Lexer = (function LexerClosure() {
       return (this.currentChar = this.stream.getByte());
     },
     peekChar: function Lexer_peekChar() {
-      return this.stream.peekBytes(1)[0];
+      return this.stream.peekByte();
     },
     getNumber: function Lexer_getNumber() {
       var ch = this.currentChar;
diff --git a/src/core/stream.js b/src/core/stream.js
index 482091e..bd24473 100644
--- a/src/core/stream.js
+++ b/src/core/stream.js
@@ -73,6 +73,11 @@ var Stream = (function StreamClosure() {
       this.pos = end;
       return bytes.subarray(pos, end);
     },
+    peekByte: function Stream_peekByte() {
+      var peekedByte = this.getByte();
+      this.pos--;
+      return peekedByte;
+    },
     peekBytes: function Stream_peekBytes(length) {
       var bytes = this.getBytes(length);
       this.pos -= bytes.length;
@@ -202,6 +207,11 @@ var DecodeStream = (function DecodeStreamClosure() {
       this.pos = end;
       return this.buffer.subarray(pos, end);
     },
+    peekByte: function DecodeStream_peekByte() {
+      var peekedByte = this.getByte();
+      this.pos--;
+      return peekedByte;
+    },
     peekBytes: function DecodeStream_peekBytes(length) {
       var bytes = this.getBytes(length);
       this.pos -= bytes.length;
@@ -527,7 +537,7 @@ var FlateStream = (function FlateStreamClosure() {
       var end = bufferLength + blockLen;
       this.bufferLength = end;
       if (blockLen === 0) {
-        if (str.peekBytes(1).length === 0) {
+        if (str.peekByte() === -1) {
           this.eof = true;
         }
       } else {

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