Add QPDFMatrix::operator==

ChangeLog

@@ -1,5 +1,7 @@
 2021-03-03  Jay Berkenbilt  <ejb@ql.org>
 
+	* Add QPDFMatrix::operator==
+
 	* Add QPDFObjectHandle::makeResourcesIndirect
 
 2021-03-02  Jay Berkenbilt  <ejb@ql.org>

include/qpdf/QPDFMatrix.hh

@@ -90,6 +90,16 @@ class QPDFMatrix
     QPDFObjectHandle::Rectangle transformRectangle(
         QPDFObjectHandle::Rectangle r);
 
+    // operator== tests for exact equality, not considering deltas for
+    // floating point.
+    QPDF_DLL
+    bool operator==(QPDFMatrix const& rhs) const;
+    QPDF_DLL
+    bool operator!=(QPDFMatrix const& rhs) const
+    {
+        return ! operator==(rhs);
+    }
+
     double a;
     double b;
     double c;

libqpdf/QPDFMatrix.cc

@@ -142,3 +142,14 @@ QPDFMatrix::transformRectangle(QPDFObjectHandle::Rectangle r) const
         *std::max_element(tx.begin(), tx.end()),
         *std::max_element(ty.begin(), ty.end()));
 }
+
+bool
+QPDFMatrix::operator==(QPDFMatrix const& rhs) const
+{
+    return ((this->a == rhs.a) &&
+            (this->b == rhs.b) &&
+            (this->c == rhs.c) &&
+            (this->d == rhs.d) &&
+            (this->e == rhs.e) &&
+            (this->f == rhs.f));
+}