1 files changed, 68 insertions, 0 deletions
diff --git a/src/buffer.h b/src/buffer.h
new file mode 100644
index 0000000..1b73505
--- /dev/null
+++ b/src/buffer.h
@@ -0,0 +1,68 @@
+#include <stddef.h>
+#include <stdint.h>
+
+#include "command.h"
+#include "text.h"
+
+struct keymap;
+
+struct buffer {
+  const char *name;
+  const char *filename;
+
+  struct text *text;
+
+  uint32_t dot_line;
+  uint32_t dot_col;
+
+  uint8_t *modeline_buf;
+
+  // local keymaps
+  struct keymap *keymaps;
+  uint32_t nkeymaps;
+  uint32_t nkeymaps_max;
+
+  uint32_t lines_rendered;
+};
+
+struct buffer_update {
+  struct render_cmd *cmds;
+  uint64_t ncmds;
+};
+
+typedef void *(alloc_fn)(size_t);
+
+struct buffer buffer_create(const char *name);
+void buffer_destroy(struct buffer *buffer);
+
+uint32_t buffer_keymaps(struct buffer *buffer, struct keymap **keymaps_out);
+void buffer_add_keymap(struct buffer *buffer, struct keymap *keymap);
+
+int buffer_add_text(struct buffer *buffer, uint8_t *text, uint32_t nbytes);
+
+void buffer_backward_delete_char(struct buffer *buffer);
+void buffer_backward_char(struct buffer *buffer);
+void buffer_forward_char(struct buffer *buffer);
+void buffer_backward_line(struct buffer *buffer);
+void buffer_forward_line(struct buffer *buffer);
+void buffer_end_of_line(struct buffer *buffer);
+void buffer_beginning_of_line(struct buffer *buffer);
+void buffer_newline(struct buffer *buffer);
+
+struct buffer buffer_from_file(const char *filename);
+int buffer_to_file(struct buffer *buffer);
+
+struct buffer_update buffer_begin_frame(struct buffer *buffer, uint32_t width,
+                                        uint32_t height, alloc_fn frame_alloc);
+void buffer_end_frame(struct buffer *buffer, struct buffer_update *upd);
+
+static struct command BUFFER_COMMANDS[] = {
+    {.name = "backward-delete-char", .fn = buffer_backward_delete_char},
+    {.name = "backward-char", .fn = buffer_backward_char},
+    {.name = "forward-char", .fn = buffer_forward_char},
+    {.name = "backward-line", .fn = buffer_backward_line},
+    {.name = "forward-line", .fn = buffer_forward_line},
+    {.name = "end-of-line", .fn = buffer_end_of_line},
+    {.name = "beginning-of-line", .fn = buffer_beginning_of_line},
+    {.name = "newline", .fn = buffer_newline},
+};