Add unicode general category lookup

Generate the lookup tables from UnicodeData.txt, do to that,
add gen_ugc, which uses csv, buffers, line, io and other modules
to do the job.

1 files changed, 31 insertions, 0 deletions

diff --git a/src/buffer.hh b/src/buffer.hh
new file mode 100644
index 0000000..685cd36
--- /dev/null
+++ b/src/buffer.hh
@@ -0,0 +1,31 @@
+#ifndef BUFFER_HH
+#define BUFFER_HH
+
+#include <cstddef>
+#include <memory>
+
+class Buffer {
+ public:
+  virtual ~Buffer() = default;
+
+  virtual void const* rptr(size_t& avail, size_t need = 1) = 0;
+  virtual void consume(size_t size) = 0;
+
+  virtual void* wptr(size_t& avail, size_t need = 1) = 0;
+  virtual void commit(size_t size) = 0;
+
+  [[nodiscard]] virtual bool full() const = 0;
+  [[nodiscard]] virtual bool empty() const = 0;
+
+  [[nodiscard]]
+  static std::unique_ptr<Buffer> fixed(size_t size);
+  [[nodiscard]]
+  static std::unique_ptr<Buffer> dynamic(size_t start_size, size_t max_size);
+
+ protected:
+  Buffer() = default;
+  Buffer(Buffer const&) = delete;
+  Buffer& operator=(Buffer const&) = delete;
+};
+
+#endif  // BUFFER_HH