From bed165c9fc070d2c483d8cc9bd0e7ac299b29e23 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Sun, 18 Oct 2020 07:43:05 -0400
Subject: Stop using InputSource::unreadCh

---
 libqpdf/FileInputSource.cc | 2 +-
 libqpdf/QPDF.cc            | 6 +++---
 libqpdf/QPDFTokenizer.cc   | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

(limited to 'libqpdf')

diff --git a/libqpdf/FileInputSource.cc b/libqpdf/FileInputSource.cc
index cd8feda4..5ec6a170 100644
--- a/libqpdf/FileInputSource.cc
+++ b/libqpdf/FileInputSource.cc
@@ -80,7 +80,7 @@ FileInputSource::findAndSkipNextEOL()
                     }
                     else if (! ((ch == '\r') || (ch == '\n')))
                     {
-                        this->unreadCh(ch);
+                        this->seek(-1, SEEK_CUR);
                         done = true;
                     }
                 }
diff --git a/libqpdf/QPDF.cc b/libqpdf/QPDF.cc
index 5aa2d98c..2ebf88b0 100644
--- a/libqpdf/QPDF.cc
+++ b/libqpdf/QPDF.cc
@@ -632,7 +632,7 @@ QPDF::read_xref(qpdf_offset_t xref_offset)
                 }
                 else
                 {
-                    this->m->file->unreadCh(ch);
+                    this->m->file->seek(-1, SEEK_CUR);
                     done = true;
                 }
             }
@@ -1604,7 +1604,7 @@ QPDF::readObject(PointerHolder<InputSource> input,
                             // start reading stream data in spite
                             // of not having seen a newline.
                             QTC::TC("qpdf", "QPDF stream with CR only");
-                            input->unreadCh(ch);
+                            input->seek(-1, SEEK_CUR);
                             warn(QPDFExc(
                                      qpdf_e_damaged_pdf,
                                      input->getName(),
@@ -1629,7 +1629,7 @@ QPDF::readObject(PointerHolder<InputSource> input,
                 else
                 {
                     QTC::TC("qpdf", "QPDF stream without newline");
-                    input->unreadCh(ch);
+                    input->seek(-1, SEEK_CUR);
                     warn(QPDFExc(qpdf_e_damaged_pdf, input->getName(),
                                  this->m->last_object_description,
                                  input->tell(),
diff --git a/libqpdf/QPDFTokenizer.cc b/libqpdf/QPDFTokenizer.cc
index 4217575c..4f2e2153 100644
--- a/libqpdf/QPDFTokenizer.cc
+++ b/libqpdf/QPDFTokenizer.cc
@@ -855,7 +855,7 @@ QPDFTokenizer::readToken(PointerHolder<InputSource> input,
 
     if (unread_char)
     {
-	input->unreadCh(char_to_unread);
+	input->seek(-1, SEEK_CUR);
     }
 
     if (token.getType() != tt_eof)
-- 
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