LibDebug: Add LineProgram::get_directory_and_file(size_t)

This function returns the directory path & filename for a given file
index.

2 files changed, 15 insertions, 0 deletions

diff --git a/Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp b/Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp
index b0d7d24b17..e1d6da2406 100644
--- a/Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp
+++ b/Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp
@@ -290,4 +290,13 @@ void LineProgram::run_program()
     }
 }
 
+LineProgram::DirectoryAndFile LineProgram::get_directory_and_file(size_t file_index) const
+{
+    VERIFY(file_index < m_source_files.size());
+    auto file_entry = m_source_files[file_index];
+    VERIFY(file_entry.directory_index < m_source_directories.size());
+    auto directory_entry = m_source_directories[file_entry.directory_index];
+    return { directory_entry, file_entry.name };
+}
+
 }
diff --git a/Userland/Libraries/LibDebug/Dwarf/LineProgram.h b/Userland/Libraries/LibDebug/Dwarf/LineProgram.h
index b69234cd54..abac23a313 100644
--- a/Userland/Libraries/LibDebug/Dwarf/LineProgram.h
+++ b/Userland/Libraries/LibDebug/Dwarf/LineProgram.h
@@ -116,6 +116,12 @@ public:
 
     const Vector<LineInfo>& lines() const { return m_lines; }
 
+    struct DirectoryAndFile {
+        FlyString directory;
+        FlyString filename;
+    };
+    DirectoryAndFile get_directory_and_file(size_t file_index) const;
+
 private:
     void parse_unit_header();
     void parse_source_directories();