Initial commit

1 files changed, 98 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..bdd0c3a
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2024 Richard Braun.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted.
+ *
+ * THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE
+ * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
+ * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "eetg.h"
+#include "ei.h"
+
+static struct termios orig_ios;
+
+static struct ei_game game;
+
+static void
+restore_termios(void)
+{
+    tcsetattr(STDIN_FILENO, TCSANOW, &orig_ios);
+    write(STDOUT_FILENO, "\ec", 2);
+}
+
+static void
+setup_io(void)
+{
+    struct termios ios;
+
+    setvbuf(stdin, NULL, _IONBF, 0);
+
+    fcntl(STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL) | O_NONBLOCK);
+
+    tcgetattr(STDIN_FILENO, &orig_ios);
+    atexit(restore_termios);
+    ios = orig_ios;
+    ios.c_lflag &= ~(ICANON | ECHO);
+    ios.c_cc[VMIN] = 1;
+    ios.c_cc[VTIME] = 0;
+    tcsetattr(STDIN_FILENO, TCSANOW, &ios);
+}
+
+static void
+write_terminal(const void *buffer, size_t size, void *arg)
+{
+    (void)arg;
+
+    write(STDOUT_FILENO, buffer, size);
+}
+
+int
+main(void)
+{
+    bool leave;
+
+    setup_io();
+
+    eetg_init_rand(time(NULL));
+
+    ei_game_init(&game, write_terminal, NULL);
+
+    do {
+        ssize_t nr_bytes;
+        int8_t c;
+
+        usleep(1000000 / EI_FPS);
+
+        nr_bytes = read(STDIN_FILENO, &c, 1);
+
+        if (nr_bytes == -1) {
+            if (errno == EAGAIN) {
+                c = -1;
+            } else {
+                break;
+            }
+        }
+
+        leave = ei_game_process(&game, c);
+    } while (!leave);
+
+    return EXIT_SUCCESS;
+}