Fixed some potential issues.

README.md

@@ -7,6 +7,17 @@ A simple Go library which enables reading PDF files. Forked from https://github.
 Features
   - Get plain text content (without format)
   - Get Content (including all font and formatting information)
+## DEBUG
+
+```go
+// string(b.r.Reader.r.buf) corresponds to the PDF content.
+// b.r.Reader.r.w correspond to the PDF content length and can be searched directly
+// string(b.r.Reader.decompressor.dict.hist) is the decompressed PDF stream
+// b.tmp and tok is the keyword
+//(*b).pos +1 is the current read position
+
+// strm.ptr.id is the object id example:xx 0 obj
+```
 
 ## Install:
 

lex.go

@@ -20,7 +20,6 @@ import (
 //	string, a PDF string literal
 //	keyword, a PDF keyword
 //	name, a PDF name without the leading slash
-//
 type token interface{}
 
 // A name is a PDF name, without the leading slash.
@@ -125,6 +124,7 @@ func (b *buffer) unreadToken(t token) {
 }
 
 func (b *buffer) readToken() token {
+
 	if n := len(b.unread); n > 0 {
 		t := b.unread[n-1]
 		b.unread = b.unread[:n-1]
@@ -419,6 +419,10 @@ func (b *buffer) readObject() object {
 			return b.readDict()
 		case "[":
 			return b.readArray()
+		case ">>":
+			return nil
+		case "]":
+			return nil
 		}
 		b.errorf("unexpected keyword %q parsing object", kw)
 		return nil
@@ -467,6 +471,12 @@ func (b *buffer) readArray() object {
 		if tok == nil || tok == keyword("]") {
 			break
 		}
+
+		// Check EOF
+		if err, ok := tok.(error); ok && err == io.EOF {
+			break
+		}
+
 		b.unreadToken(tok)
 		x = append(x, b.readObject())
 	}
@@ -480,6 +490,12 @@ func (b *buffer) readDict() object {
 		if tok == nil || tok == keyword(">>") {
 			break
 		}
+
+		// Check EOF
+		if err, ok := tok.(error); ok && err == io.EOF {
+			break
+		}
+
 		n, ok := tok.(name)
 		if !ok {
 			b.errorf("unexpected non-name key %T(%v) parsing dictionary", tok, tok)