1 files changed, 51 insertions, 0 deletions
diff --git a/xpad.c b/xpad.c
new file mode 100644
index 0000000..231bdd9
--- /dev/null
+++ b/xpad.c
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <assert.h>
+
+#include "xpad.h"
+
+static int xpad_fd = 0;
+
+uint16_t xpad_fpad() {
+    uint16_t fpad = 0x2; // CI flag
+
+    if (xpad_len()) {
+        fpad |= 1<<13; // variable length X-PAD
+    }
+
+    return fpad;
+}
+
+int xpad_len() {
+    if (xpad_fd == 0) {
+        xpad_fd = open("/home/bram/dab/mot-slideshow.file", O_RDONLY);
+        if (xpad_fd < 0) {
+            perror("Failed to open xpad file");
+            exit(1);
+        }
+    }
+    return 1;
+}
+
+uint8_t xpad_byte(void) {
+    uint8_t dat;
+
+    assert(xpad_fd != 0);
+    ssize_t num_read = read(xpad_fd, &dat, 1);
+
+    if (num_read == 0) {
+        fprintf(stderr, "xpad rewind\n");
+        lseek(xpad_fd, 0, SEEK_SET);
+        num_read = read(xpad_fd, &dat, 1);
+
+        assert(num_read == 1);
+    }
+
+    return dat;
+}
+