Spell check

4 files changed, 6 insertions, 4 deletions

diff --git a/include/qpdf/QIntC.hh b/include/qpdf/QIntC.hh
index e6c337c2..6e997ffc 100644
--- a/include/qpdf/QIntC.hh
+++ b/include/qpdf/QIntC.hh
@@ -277,6 +277,7 @@ namespace QIntC // QIntC = qpdf Integer Conversion
         QIntC::range_check_error<T>(cur, delta);
     }
 
+    // ABI: fix spelling error in function name
     template <typename T>
     void
     range_check_substract_error(T const& cur, T const& delta)
@@ -295,6 +296,7 @@ namespace QIntC // QIntC = qpdf Integer Conversion
         }
     }
 
+    // ABI: fix typo in function name
     template <typename T>
     inline void
     range_check_substract(T const& cur, T const& delta)
diff --git a/include/qpdf/QPDFObjectHandle.hh b/include/qpdf/QPDFObjectHandle.hh
index 03262b40..ca135125 100644
--- a/include/qpdf/QPDFObjectHandle.hh
+++ b/include/qpdf/QPDFObjectHandle.hh
@@ -1177,7 +1177,7 @@ class QPDFObjectHandle
     //     mappings are not reversible. There is no way to tell the difference between a string that
     //     looks like a name or indirect object from an actual name or indirect object.
     //   * JSON v2:
-    //     * Unicode strings and strings encoded with PDF Doc encoding that can be bidrectionally
+    //     * Unicode strings and strings encoded with PDF Doc encoding that can be bidirectionally
     //       mapped two Unicode (which is all strings without undefined characters) are represented
     //       as "u:" followed by the UTF-8 encoded string. Example:
     //       "u:potato".
diff --git a/include/qpdf/QPDFWriter.hh b/include/qpdf/QPDFWriter.hh
index be2d6f2e..6bbe69e4 100644
--- a/include/qpdf/QPDFWriter.hh
+++ b/include/qpdf/QPDFWriter.hh
@@ -293,7 +293,7 @@ class QPDFWriter
     QPDF_DLL
     void setSuppressOriginalObjectIDs(bool);
 
-    // Preserve encryption.  The default is true unless prefilering, content normalization, or qdf
+    // Preserve encryption.  The default is true unless prefiltering, content normalization, or qdf
     // mode has been selected in which case encryption is never preserved.  Encryption is also not
     // preserved if we explicitly set encryption parameters.
     QPDF_DLL
diff --git a/include/qpdf/qpdf-c.h b/include/qpdf/qpdf-c.h
index e3639a43..d4305602 100644
--- a/include/qpdf/qpdf-c.h
+++ b/include/qpdf/qpdf-c.h
@@ -608,7 +608,7 @@ extern "C" {
      * not destroy the object. All QPDFObjectHandle objects are deleted when they are no longer
      * referenced. Releasing an object handle simply invalidates it. For example, if you create an
      * object, add it to an existing dictionary or array, and then release its handle, the object is
-     * safely part of the dictionary or array. Similarly, any other object handle refering to the
+     * safely part of the dictionary or array. Similarly, any other object handle referring to the
      * object remains valid. Explicitly releasing an object handle is essentially the same as
      * letting a QPDFObjectHandle go out of scope in the C++ API.
      *
@@ -826,7 +826,7 @@ extern "C" {
     qpdf_oh qpdf_oh_new_string(qpdf_data qpdf, char const* str);
     QPDF_DLL
     qpdf_oh qpdf_oh_new_unicode_string(qpdf_data qpdf, char const* utf8_str);
-    /* Use qpdf_oh_new_binary_string for creating a string that may contain atrbitary binary data
+    /* Use qpdf_oh_new_binary_string for creating a string that may contain arbitrary binary data
      * including embedded null characters.
      */
     QPDF_DLL