Merge pull request #929 from m-holger/ogguard

Add new convenience class QPDFObjGen::Guard

1 files changed, 54 insertions, 2 deletions

diff --git a/libqpdf/QPDFObjGen.cc b/libqpdf/QPDFObjGen.cc
index 7cce84d8..8e5bd178 100644
--- a/libqpdf/QPDFObjGen.cc
+++ b/libqpdf/QPDFObjGen.cc
@@ -1,7 +1,12 @@
 #include <qpdf/QPDFObjGen.hh>
 
-#include <qpdf/QUtil.hh>
+#include <qpdf/QPDFObjectHandle.hh>
+#include <qpdf/QPDFObjectHelper.hh>
+#include <qpdf/QPDFObject_private.hh>
 
+#include <stdexcept>
+
+// ABI: inline and pass og by value
 std::ostream&
 operator<<(std::ostream& os, const QPDFObjGen& og)
 {
@@ -9,8 +14,55 @@ operator<<(std::ostream& os, const QPDFObjGen& og)
     return os;
 }
 
+// ABI: inline
 std::string
 QPDFObjGen::unparse(char separator) const
 {
-    return std::to_string(this->obj) + separator + std::to_string(this->gen);
+    return std::to_string(obj) + separator + std::to_string(gen);
+}
+
+bool
+QPDFObjGen::set::add(QPDFObjectHandle const& oh)
+{
+    if (auto* ptr = oh.getObjectPtr()) {
+        return add(ptr->getObjGen());
+    } else {
+        throw std::logic_error("attempt to retrieve QPDFObjGen from "
+                               "uninitialized QPDFObjectHandle");
+        return false;
+    }
+}
+
+bool
+QPDFObjGen::set::add(QPDFObjectHelper const& helper)
+{
+    if (auto* ptr = helper.getObjectHandle().getObjectPtr()) {
+        return add(ptr->getObjGen());
+    } else {
+        throw std::logic_error("attempt to retrieve QPDFObjGen from "
+                               "uninitialized QPDFObjectHandle");
+        return false;
+    }
+}
+
+void
+QPDFObjGen::set::erase(QPDFObjectHandle const& oh)
+{
+    if (auto* ptr = oh.getObjectPtr()) {
+        erase(ptr->getObjGen());
+    } else {
+        throw std::logic_error("attempt to retrieve QPDFObjGen from "
+                               "uninitialized QPDFObjectHandle");
+    }
+}
+
+void
+QPDFObjGen::set::erase(QPDFObjectHelper const& helper)
+{
+    if (auto* ptr = helper.getObjectHandle().getObjectPtr()) {
+        erase(ptr->getObjGen());
+    } else {
+        throw std::logic_error("attempt to retrieve QPDFObjGen from "
+                               "uninitialized QPDFObjectHandle");
+    }
 }