1 files changed, 63 insertions, 0 deletions
diff --git a/TUI/unix.jai b/TUI/unix.jai
new file mode 100644
index 0000000..439447d
--- /dev/null
+++ b/TUI/unix.jai
@@ -0,0 +1,63 @@
+#import "POSIX";
+
+
+    __term : My_Termios;
+
+    My_Termios :: struct {
+        c_iflag : u32;      // Input mode flags.
+        c_oflag : u32;      // Output mode flags.
+        c_cflag : u32;      // Control modes flags.
+        c_lflag : u32;      // Local modes flags.
+        c_line : u8;        // Line discipline.
+        c_cc : [32]u8;      // Control characters.
+        c_ispeed : u32;     // Input speed (baud rates).
+        c_ospeed : u32;     // Output speed (baud rates).
+    }
+
+    // Required to do unlocking input.
+    libc :: #system_library "libc";
+
+    // https://codebrowser.dev/glibc/glibc/sysdeps/unix/sysv/linux/tcsetattr.c.html
+    tcsetattr :: (fd : s32, optional_actions : s32, termios_p : *My_Termios) -> s32 #foreign libc;
+
+    // https://codebrowser.dev/glibc/glibc/sysdeps/unix/sysv/linux/tcgetattr.c.html
+    tcgetattr :: (fd : s32, termios_p : *My_Termios) -> s32 #foreign libc;
+    
+
+OS_prepare_terminal :: () {
+    // TODO Required to do unlocking input.
+    tcgetattr(STDIN_FILENO, *__term);
+    term_new := __term;
+
+    term_new.c_iflag &= 0xFFFFFA14;// ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
+    term_new.c_oflag &= 0xFFFFFFFE;// ~OPOST;
+    term_new.c_lflag &= 0xFFFF7FB4;// ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
+    term_new.c_cflag &= 0xFFFFFECF;// ~(CSIZE | PARENB);
+    term_new.c_cflag |= 0x00000030;
+
+    tcsetattr(STDIN_FILENO, 0, *term_new);
+}
+
+OS_reset_terminal :: () {
+    tcsetattr(STDIN_FILENO, 0, *__term); // return echo
+}
+
+OS_get_terminal_size :: () -> rows: int, columns: int {
+    buffer: [512] u8;
+    write_string(Commands.QueryWindowSizeInChars);
+    bytes_read := read(STDIN_FILENO, buffer.data, buffer.count-1);
+
+    str := to_string(buffer.data, bytes_read);
+
+    // Result: [8;79;156t
+    assert(
+        buffer.data[0] == #char "\e" &&
+        buffer.data[1] == #char "[" &&
+        buffer.data[2] == #char "8",
+        "Query windows size in chars returned invalid response.");
+
+    parts := split(str, ";");
+    rows := parse_int(*parts[1]);
+    columns := parse_int(*parts[2]);
+    return rows, columns;
+}