Merge pull request #147 from zyantific/lable-name

Add getter and setter for label names

Author: ZehMatt

zasm/include/zasm/program/program.hpp

@@ -263,6 +263,20 @@ namespace zasm
         /// <returns>Node for which the label is bound to or null if the label is invalid or not bound</returns>
         Node* getNodeForLabel(const Label& label);
 
+        /// <summary>
+        /// Returns the current assigned label name, returns nullptr if the label is invalid or has no name.
+        /// </summary>
+        /// <param name="label">Label</param>
+        /// <returns>Label name or nullptr</returns>
+        const char* getLabelName(const Label& label) const noexcept;
+
+        /// <summary>
+        /// Assigns a name to a label.
+        /// </summary>
+        /// <param name="label">Label</param>
+        /// <param name="name">The new name, pasing nullptr will clear the name, the string will be copied</param>
+        void setLabelName(const Label& label, const char* name);
+
     public:
         /// <summary>
         /// Creates a new section that can be used to segment code and data.

zasm/src/zasm/src/program/program.cpp

@@ -110,6 +110,54 @@ namespace zasm
         return entry.node;
     }
 
+    const char* Program::getLabelName(const Label& label) const noexcept
+    {
+        if (!label.isValid())
+        {
+            return nullptr;
+        }
+
+        const auto entryIdx = static_cast<std::size_t>(label.getId());
+        if (entryIdx >= _state->labels.size())
+        {
+            return nullptr;
+        }
+
+        auto& entry = _state->labels[entryIdx];
+        if (entry.nameId != StringPool::Id::Invalid)
+        {
+            return _state->symbolNames.get(entry.nameId);
+        }
+
+        return nullptr;
+    }
+
+    void Program::setLabelName(const Label& label, const char* name)
+    {
+        if (!label.isValid())
+        {
+            return;
+        }
+
+        const auto entryIdx = static_cast<std::size_t>(label.getId());
+        if (entryIdx >= _state->labels.size())
+        {
+            return;
+        }
+
+        auto& entry = _state->labels[entryIdx];
+        if (entry.nameId != StringPool::Id::Invalid)
+        {
+            _state->symbolNames.release(entry.nameId);
+            entry.nameId = StringPool::Id::Invalid;
+        }
+
+        if (name != nullptr)
+        {
+            entry.nameId = _state->symbolNames.aquire(name);
+        }
+    }
+
     Node* Program::getNodeForSection(const Section& section)
     {
         if (!section.isValid())