1 files changed, 71 insertions, 0 deletions
diff --git a/elpa/irony-20220110.849/server/src/CompDBCache.cpp b/elpa/irony-20220110.849/server/src/CompDBCache.cpp
new file mode 100644
index 0000000..f79ec8c
--- /dev/null
+++ b/elpa/irony-20220110.849/server/src/CompDBCache.cpp
@@ -0,0 +1,71 @@
+#include "CompDBCache.h"
+
+#include <sys/stat.h>
+
+#include <cassert>
+
+CompDBCache::CompDBCache()
+  : db_(nullptr), mtime_(0) {
+}
+
+CompDBCache::~CompDBCache() {
+  clear();
+}
+
+CXCompilationDatabase CompDBCache::fromDirectory(const std::string &buildDir,
+                                                 CXCompilationDatabase_Error *error) {
+  assert(error != nullptr);
+
+  const std::string jsonFilename = constructJsonDbFilename(buildDir);
+  const time_t mtime = modificationTime(jsonFilename);
+
+  if (jsonFilename == filename_ && mtime != 0 && mtime == mtime_) {
+    // Using the cached compilation database.
+    // Just set the provided error code to indicate success.
+    *error = CXCompilationDatabase_NoError;
+  } else {
+    clear();
+
+    db_ = clang_CompilationDatabase_fromDirectory(buildDir.c_str(), error);
+
+    if (mtime != 0 && *error == CXCompilationDatabase_NoError) {
+      // Successfully loaded a JSON compilation database.
+      // Cache the result.
+      filename_ = jsonFilename;
+      mtime_ = mtime;
+    }
+  }
+
+  return db_;
+}
+
+void CompDBCache::clear() {
+  if (db_) {
+    clang_CompilationDatabase_dispose(db_);
+    db_ = nullptr;
+    filename_.clear();
+    mtime_ = 0;
+  }
+}
+
+std::string CompDBCache::constructJsonDbFilename(const std::string &buildDir) const {
+  std::string ret = buildDir;
+  if (!buildDir.empty() && buildDir.back() != '/')
+    ret += '/';
+  ret += "compile_commands.json";
+  return ret;
+}
+
+time_t CompDBCache::modificationTime(const std::string &filename) const {
+  time_t mtime = 0;
+#ifdef _WIN32
+  struct _stat st;
+  const int statRes = _stat(filename.c_str(), &st);
+#else
+  struct stat st;
+  const int statRes = stat(filename.c_str(), &st);
+#endif
+  if (statRes == 0)
+    mtime = st.st_mtime;
+  return mtime;
+}