Major updates:

- A lotta cleanup
- BEd command parser rewrite
- Vase class removed
- Proper IO system.
- A lot more.

src/internal/vase/storage/original.cc

@@ -0,0 +1,47 @@
+#include "internal/vase/vase.h"
+
+namespace bed::internal::vase {
+OriginalStorage::OriginalStorage(std::filesystem::path base_dir) {
+  if (!std::filesystem::exists(base_dir) || !std::filesystem::is_directory(base_dir))
+    throw std::runtime_error("Swap directory does not exist or is not a directory.");
+  base_dir /= "tbuf.XXXXXX";
+  char *s = strdup(base_dir.c_str());
+  fd = mkstemp(s);
+  if (fd == -1)
+    throw std::runtime_error("mkstemp failed");
+  unlink(s);
+  free(s);
+}
+
+OriginalStorage::~OriginalStorage() {
+  if (buf)
+    munmap((char *)buf, len);
+  if (fd != -1)
+    close(fd);
+}
+
+void OriginalStorage::initialize() {
+  struct stat st;
+  if (fstat(fd, &st) == -1)
+    throw std::runtime_error("fstat failed");
+  len = (uint64_t)st.st_size;
+  buf = (const char *)mmap(nullptr, len, PROT_READ, MAP_PRIVATE, fd, 0);
+  if (buf == MAP_FAILED) {
+    buf = nullptr;
+    throw std::runtime_error("mmap failed");
+  }
+  madvise((void *)buf, len, MADV_RANDOM);
+  close(fd);
+  fd = -1;
+}
+
+const char *OriginalStorage::read(uint64_t pos) {
+  if (pos >= len)
+    return nullptr;
+  return buf + pos;
+}
+
+uint64_t OriginalStorage::length() {
+  return len;
+}
+} // namespace bed::internal::vase