Reorganize code and remove hack for empty block outputs

inc/bar.h

@@ -0,0 +1,15 @@
+#pragma once
+#include "block.h"
+#include "config.h"
+#include "util.h"
+
+typedef struct {
+    char *current;
+    char *previous;
+} BarStatus;
+
+extern unsigned short debugMode;
+
+void initStatus(BarStatus *);
+void freeStatus(BarStatus *);
+void writeStatus(BarStatus *);

inc/block.h

@@ -0,0 +1,19 @@
+#pragma once
+#define _GNU_SOURCE
+
+#include "config.h"
+
+typedef struct {
+    const char *command;
+    const unsigned int interval;
+    const unsigned int signal;
+    int pipe[2];
+    char output[CMDLENGTH * 4 + 1];
+} Block;
+
+extern Block blocks[];
+extern const unsigned short blockCount;
+
+void execBlock(const Block *, const char *);
+void execBlocks(unsigned int);
+void updateBlock(Block *);

inc/util.h

@@ -0,0 +1,9 @@
+#pragma once
+#include <unistd.h>
+
+#define LEN(arr) (sizeof(arr) / sizeof(arr[0]))
+#define MAX(a, b) (a > b ? a : b)
+
+int gcd(int, int);
+void closePipe(int[2]);
+void trimUTF8(char*, unsigned int);

inc/x11.h

@@ -0,0 +1,5 @@
+#pragma once
+
+int setupX();
+int closeX();
+void setXRootName(char *);