Add new method Objects::get

libqpdf/QPDF.cc

@@ -575,32 +575,25 @@ QPDF::newStream(std::string const& data)
 QPDFObjectHandle
 QPDF::getObject(QPDFObjGen const& og)
 {
-    if (auto it = m->objects.obj_cache.find(og); it != m->objects.obj_cache.end()) {
-        return {it->second.object};
-    } else if (m->objects.xref_table().initialized() && !m->objects.xref_table().type(og)) {
-        return QPDF_Null::create();
-    } else {
-        auto result = m->objects.obj_cache.try_emplace(og, QPDF_Unresolved::create(this, og));
-        return {result.first->second.object};
-    }
+    return m->objects.get(og);
 }
 
 QPDFObjectHandle
-QPDF::getObject(int objid, int generation)
+QPDF::getObject(int id, int gen)
 {
-    return getObject(QPDFObjGen(objid, generation));
+    return m->objects.get(id, gen);
 }
 
 QPDFObjectHandle
 QPDF::getObjectByObjGen(QPDFObjGen const& og)
 {
-    return getObject(og);
+    return m->objects.get(og);
 }
 
 QPDFObjectHandle
-QPDF::getObjectByID(int objid, int generation)
+QPDF::getObjectByID(int id, int gen)
 {
-    return getObject(QPDFObjGen(objid, generation));
+    return m->objects.get(id, gen);
 }
 
 void

libqpdf/QPDF_linearization.cc

@@ -130,7 +130,7 @@ QPDF::isLinearized()
         return false;
     }
 
-    auto candidate = getObjectByID(lindict_obj, 0);
+    auto candidate = m->objects.get(lindict_obj, 0);
     if (!candidate.isDictionary()) {
         return false;
     }
@@ -563,11 +563,11 @@ QPDF::getLinearizationOffset(QPDFObjGen const& og)
 QPDFObjectHandle
 QPDF::getUncompressedObject(QPDFObjectHandle& obj, std::map<int, int> const& object_stream_data)
 {
-    if (obj.isNull() || (object_stream_data.count(obj.getObjectID()) == 0)) {
+    if (obj.isNull() || !object_stream_data.count(obj.getObjectID())) {
         return obj;
     } else {
         int repl = (*(object_stream_data.find(obj.getObjectID()))).second;
-        return getObject(repl, 0);
+        return m->objects.get(repl, 0);
     }
 }
 
@@ -578,7 +578,7 @@ QPDF::getUncompressedObject(QPDFObjectHandle& obj, Objects const& objects)
     if (obj.isNull() || objects.xref_table().type(og) != 2) {
         return obj;
     }
-    return getObject(objects.xref_table().stream_number(og.getObj()), 0);
+    return m->objects.get(objects.xref_table().stream_number(og.getObj()), 0);
 }
 
 QPDFObjectHandle
@@ -586,7 +586,7 @@ QPDF::getUncompressedObject(QPDFObjectHandle& oh, QPDFWriter::ObjTable const& ob
 {
     if (obj.contains(oh)) {
         if (auto id = obj[oh].object_stream; id > 0) {
-            return oh.isNull() ? oh : getObject(id, 0);
+            return oh.isNull() ? oh : m->objects.get(id, 0);
         }
     }
     return oh;
@@ -1430,9 +1430,9 @@ QPDF::pushOutlinesToPart(
     m->c_outline_data.first_object = outlines_og.getObj();
     m->c_outline_data.nobjects = 1;
     lc_outlines.erase(outlines_og);
-    part.push_back(outlines);
+    part.emplace_back(outlines);
     for (auto const& og: lc_outlines) {
-        part.push_back(getObject(og));
+        part.emplace_back(m->objects.get(og));
         ++m->c_outline_data.nobjects;
     }
 }

libqpdf/QPDF_objects.cc

@@ -201,7 +201,7 @@ Xref_table::reconstruct(QPDFExc& e)
         }
     }
 
-    std::vector<std::tuple<int, int, qpdf_offset_t>> objects;
+    std::vector<std::tuple<int, int, qpdf_offset_t>> found_objects;
     std::vector<qpdf_offset_t> trailers;
     int max_found = 0;
 
@@ -220,7 +220,7 @@ Xref_table::reconstruct(QPDFExc& e)
                 int obj = QUtil::string_to_int(t1.getValue().c_str());
                 int gen = QUtil::string_to_int(t2.getValue().c_str());
                 if (obj <= max_id_) {
-                    objects.emplace_back(obj, gen, token_start);
+                    found_objects.emplace_back(obj, gen, token_start);
                     if (obj > max_found) {
                         max_found = obj;
                     }
@@ -249,8 +249,8 @@ Xref_table::reconstruct(QPDFExc& e)
         check_warnings();
     }
 
-    auto rend = objects.rend();
-    for (auto it = objects.rbegin(); it != rend; it++) {
+    auto rend = found_objects.rend();
+    for (auto it = found_objects.rbegin(); it != rend; it++) {
         auto [obj, gen, token_start] = *it;
         insert(obj, 1, token_start, gen);
         check_warnings();
@@ -265,7 +265,7 @@ Xref_table::reconstruct(QPDFExc& e)
             if (item.type() != 1) {
                 continue;
             }
-            auto oh = qpdf.getObject(i, item.gen());
+            auto oh = objects.get(i, item.gen());
             try {
                 if (!oh.isStreamOfType("/XRef")) {
                     continue;
@@ -1598,7 +1598,7 @@ Objects::resolveObjectsInStream(int obj_stream_number)
     }
     m->resolved_object_streams.insert(obj_stream_number);
     // Force resolution of object stream
-    QPDFObjectHandle obj_stream = qpdf.getObject(obj_stream_number, 0);
+    QPDFObjectHandle obj_stream = get(obj_stream_number, 0);
     if (!obj_stream.isStream()) {
         throw qpdf.damagedPDF(
             "supposed object stream " + std::to_string(obj_stream_number) + " is not a stream");

libqpdf/qpdf-c.cc

@@ -905,7 +905,7 @@ qpdf_oh
 qpdf_get_object_by_id(qpdf_data qpdf, int objid, int generation)
 {
     QTC::TC("qpdf", "qpdf-c called qpdf_get_object_by_id");
-    return new_object(qpdf, qpdf->qpdf->getObjectByID(objid, generation));
+    return new_object(qpdf, qpdf->qpdf->getObject(objid, generation));
 }
 
 template <class RET>

libqpdf/qpdf/QPDF_objects.hh

@@ -3,6 +3,9 @@
 
 #include <qpdf/QPDF.hh>
 
+#include <qpdf/QPDF_Null.hh>
+#include <qpdf/QPDF_Unresolved.hh>
+
 #include <variant>
 
 // The Objects class is responsible for keeping track of all objects belonging to a QPDF instance,
@@ -419,6 +422,25 @@ class QPDF::Objects
         return xref.trailer();
     }
 
+    QPDFObjectHandle
+    get(QPDFObjGen og)
+    {
+        if (auto it = obj_cache.find(og); it != obj_cache.end()) {
+            return {it->second.object};
+        } else if (xref.initialized() && !xref.type(og)) {
+            return QPDF_Null::create();
+        } else {
+            auto result = obj_cache.try_emplace(og, QPDF_Unresolved::create(&qpdf, og));
+            return {result.first->second.object};
+        }
+    }
+
+    QPDFObjectHandle
+    get(int id, int gen)
+    {
+        return get(QPDFObjGen(id, gen));
+    }
+
     std::map<QPDFObjGen, Entry> obj_cache;
 
     QPDFObjectHandle readObjectInStream(std::shared_ptr<InputSource>& input, int obj);