add ncurses wrapper

cli/_pty.c

@@ -55,7 +55,7 @@ int mkpty(int *fdmx, int *fds) {
       goto fail;
   }
 
-  // Propagate file descriptors via parameters
+  /* Propagate file descriptors via parameters */
   *fdmx = _fdmx;
   *fds = _fds;
   return EXIT_SUCCESS;

cli/curse.c

@@ -0,0 +1,77 @@
+#include <locale.h>
+#include <unistd.h>
+
+#include "curse.h"
+
+#define BASE_DELAY 1000000
+#define CRS_LOCALE "en_US.UTF-8"
+
+/* Set ncurses terminal mode (buffering, character processing,
+ * Key->SIG handling, and other termios(3) functionality).
+ */
+inline int termmode(enum crs_mode mode) {
+  switch (mode) {
+  case WMODE_CBREAK:
+    return cbreak();
+  case WMODE_RAW:
+    return raw();
+  case WMODE_NOCBREAK:
+    return nocbreak();
+  case WMODE_NORAW:
+    return noraw();
+    /* defaulting is not possible. */
+  }
+}
+
+/* Initialise ncurses for our usecase.
+ * WARNING: This function should only be called once.
+ */
+inline void init_ncurses(void) {
+  // ncurses expects a locale for consistent behaviour
+  setlocale(LC_ALL, CRS_LOCALE);
+
+  /* NCurses Init */
+  *stdscr = initscr();
+  start_color();
+
+  /* Screen Configuration */
+  termmode(WMODE_CBREAK);
+  noecho();               // manually echo <- getch(3x)
+  nodelay(*stdscr, TRUE); // getch(3x) nonblocking IO
+  keypad(*stdscr, TRUE);  // allow function keys
+  // intrflush(3x) - flush terminal input buffer on interrupt key
+  intrflush(*stdscr, FALSE);
+
+  curs_set(0); // hide cursor
+
+  // init_pair(1, COLOR_BLACK, COLOR_CYAN);
+}
+
+int main(int argc, char *argv[]) {
+  WINDOW *stdscr;
+  crs_init(&stdscr);
+
+  // Set background
+  wbkgd(stdscr, COLOR_PAIR(1));
+
+  attron(COLOR_PAIR(1));
+  attron(A_BOLD);
+  int counter = 0;
+  while (1) {
+    mvprintw(0, 0, "COUNTER %d", counter++);
+    refresh();
+
+    switch (getch()) {
+    case 'q':
+      goto end;
+    default:
+      break;
+    }
+
+    usleep(BASE_DELAY);
+  }
+
+end:
+  endwin();
+  return 0;
+}

cli/curse.h

@@ -0,0 +1,21 @@
+#ifndef DORNE_CURSE_H
+#define DORNE_CURSE_H
+
+/* libncurses with wide-character support. */
+#include <ncursesw/ncurses.h>
+
+enum crs_mode {
+  /* tty cbreak mode */
+  WMODE_CBREAK,
+  /* tty raw mode */
+  WMODE_RAW,
+  /* tty cooked mode (ISIG & IXON not modified)*/
+  WMODE_NOCBREAK,
+  /* tty cooked mode (ISIG & IXON set) */
+  WMODE_NORAW,
+};
+
+int termmode(enum crs_mode mode);
+void init_ncurses(void);
+
+#endif /* DORNE_CURSE_H */