Espresso 0.0.2c

include/new_tty.h

@@ -0,0 +1,73 @@
+#ifndef _TTY_H
+#define _TTY_H
+
+
+#include <types.h>
+
+#include <processes.h>
+#include <sync.h>
+
+
+#define TTY_BUFFER_SIZE 4096
+#define MAX_TTYS        8 /* to make things easy, might change later */
+
+#define TTY_ECHO        0x10 /* 0b00010000 */
+#define TTY_PASSWORD    0x20 /* 0b00100000 */
+#define TTY_ACTIVE      0x01 /* 0b00000001 */
+
+#define TTY_CANONICAL   0x40 /* 0b01000000 */
+
+
+#define TTY_NULL        0x80 /* 0b10000000 --- used to end the list of tty_t structs in the ttys array */
+
+#define TTY_NORMAL      TTY_ECHO | TTY_ACTIVE | TTY_CANONICAL
+
+#define MODIFIER_CAPS   0x01 /* 0b00000001 */
+#define MODIFIER_CAPS_DESTROY   0b11111110
+#define MODIFIER_SHIFT  0x02 /* 0b00000010 */
+#define MODIFIER_SHIFT_DESTROY  0b11111101
+#define MODIFIER_ALT    0x04 /* 0b00000100 */
+#define MODIFIER_ALT_DESTROY    0b11111011
+#define MODIFIER_LCTRL  0x10 /* 0b00010000 */
+#define MODIFIER_LCTRL_DESTROY   0b11101111
+#define MODIFIER_RCTRL  0x0  /* 0b00100000*/
+#define MODIFIER_RCTRL_DESTROY  0b11011111
+
+
+typedef struct tty_t {
+  char input_buffer[TTY_BUFFER_SIZE];
+  size_t head;
+  size_t tail;
+  
+  uint32_t flags;
+
+  bool canonical;
+  bool line_ready;
+
+  spinlock_t lock;
+  
+  pid_t foreground_pgid; /* not used yet */
+} tty_t;
+
+/* essentially, key is non-zero if a key like the up arrow is pressed, otherwise c is the char that was entered */
+struct keyevent {
+  uint8_t key;
+  char c;
+};
+
+int init_tty(void);
+
+ssize_t tty_read(tty_t* tty, char* buf, size_t count);
+ssize_t tty_read_active(char* buf, size_t count);
+
+tty_t* get_active_tty(void);
+tty_t* tty_get_active(void);
+
+tty_t* make_tty(uint32_t flags);
+
+void tty_receive_char(char c, uint32_t kbd_mod);
+char tty_translate_char(char c, uint32_t modifiers);
+
+void tty_input_char(tty_t* tty, char c);
+
+#endif