Adding splitting screen and buffer switching

include/buffer.h

@@ -1,8 +1,58 @@
+/**
+ * @file buffer.h
+ * @brief Buffer management for handling multiple open files
+ */
+
 #ifndef BUFFER_H_
 #define BUFFER_H_
 
 #include "data.h"
 
-int new_buffer(enum buffer_type type, char * filename, int width, int height);
+/**
+ * @brief Creates a new buffer for a file
+ * @param filename Path to the file
+ * @return Buffer ID on success, -1 on failure
+ */
+int bufferCreate(const char *filename);
+
+/**
+ * @brief Switches to a specific buffer by ID
+ * @param buffer_id The buffer ID to switch to
+ * @return 0 on success, -1 on failure
+ */
+int bufferSwitch(int buffer_id);
+
+struct buffer_t *bufferFindById(int buffer_id);
+
+/**
+ * @brief Closes a buffer by ID
+ * @param buffer_id The buffer ID to close
+ * @return 0 on success, -1 on failure
+ */
+int bufferClose(int buffer_id);
+
+/**
+ * @brief Gets the current active buffer
+ * @return Pointer to current buffer_t, NULL if none
+ */
+struct buffer_t *bufferGetCurrent(void);
+
+/**
+ * @brief Lists all open buffers
+ * @return Number of open buffers
+ */
+int bufferListAll(void);
+
+/**
+ * @brief Saves current buffer to disk
+ * @return 0 on success, -1 on failure
+ */
+int bufferSave(void);
+
+/**
+ * @brief Saves all buffers to disk
+ * @return 0 on success, -1 on failure
+ */
+int bufferSaveAll(void);
 
 #endif