Input (src/input.c)

Functions and documentation extracted from source:

• inb(port) — Read a byte from an I/O port. Returns the data byte read from the port.

• kb_read_scancode() — Read one scancode from the keyboard controller with a timeout; returns 0 on timeout to avoid blocking when hardware is absent.

• read_key() — Translate raw scancodes into logical key values. Handles E0-prefixed extended scancodes, key releases, and modifier state (shift/ctrl/alt/caps). Returns ASCII, control codes, or special constants (K_ARROW_*, K_F1..).

• is_shift_pressed(), is_ctrl_pressed(), is_alt_pressed(), is_caps_lock_on() — Query modifier and lock states.

• input_readline(buf, max) — Read a line of text into buf (NUL-terminated). Handles backspace and simple editing; blocks until Enter.

Source: src/input.c