Proper Linux support

LinuxSoundSynthesizer/.gitignore

@@ -0,0 +1,7 @@
+# Ignore binary and object files
+bin/
+obj/
+
+# Ignore internal IDE stuff
+*.layout
+*.depend

LinuxSoundSynthesizer/LinuxInput.h

@@ -0,0 +1,57 @@
+#ifndef LINUXINPUT_H_INCLUDED
+#define LINUXINPUT_H_INCLUDED
+
+// Linux async input routines
+// To use this, your user must be in "input" group:
+// sudo usermod -aG input <username>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/input.h>
+
+// Start key input poll
+FILE* start_input()
+{
+    return fopen("/dev/input/by-path/platform-i8042-serio-0-event-kbd", "rb");
+}
+
+// Retrieve all keys
+void read_keys(FILE* input, char* key_map)
+{
+    memset(key_map, 0, KEY_MAX/8 + 1);    //  Initate the array to zero's
+    ioctl(fileno(input), EVIOCGKEY(KEY_MAX/8 + 1), key_map);
+}
+
+char* get_all_keys(FILE* input)
+{
+    char* key_map = (char*)malloc(KEY_MAX/8 + 1);    //  Create a byte array the size of the number of keys
+
+    read_keys(input, key_map);
+
+    return key_map;
+}
+
+// Retrieve specific key
+int check_key_state(char* key_map, int key)
+{
+    int keyb = key_map[key/8];  //  The key we want (and the seven others arround it)
+    int mask = 1 << (key % 8);  //  Put a one in the same column as out key state will be in;
+
+    return (keyb & mask) != 0;  //  Returns true if pressed otherwise false
+}
+
+int get_key_state(FILE* input, int key)
+{
+    char key_map[KEY_MAX/8 + 1];
+
+    read_keys(input, key_map);
+
+    return check_key_state(key_map, key);
+}
+
+void stop_input(FILE* input)
+{
+    fclose(input);
+}
+
+#endif // LINUXINPUT_H_INCLUDED