Rewrite the entire code-base

The following changes are focused upon:
- Modularity
- Doing away with globals
- No heap allocations
- Better command line interface
- Switch from Xlib to XCB
- More verbose type definitions
- Implement a single-file config by utilising X-macros

src/status.c

@@ -0,0 +1,74 @@
+#include "status.h"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "block.h"
+#include "config.h"
+#include "main.h"
+#include "util.h"
+#include "x11.h"
+
+static bool has_status_changed(const status *const status) {
+    return strcmp(status->current, status->previous) != 0;
+}
+
+status status_new(void) {
+    status status = {
+        .current = {[0] = '\0'},
+        .previous = {[0] = '\0'},
+    };
+
+    return status;
+}
+
+bool status_update(status *const status) {
+    (void)strcpy(status->previous, status->current);
+    status->current[0] = '\0';
+
+    for (unsigned short i = 0; i < LEN(blocks); ++i) {
+        const block *const block = &blocks[i];
+
+        if (strlen(block->output) > 0) {
+#if LEADING_DELIMITER
+            (void)strcat(status->current, DELIMITER);
+#else
+            if (status->current[0] != '\0') {
+                (void)strcat(status->current, DELIMITER);
+            }
+#endif
+
+#if CLICKABLE_BLOCKS
+            if (block->signal > 0) {
+                const char signal[] = {(char)block->signal, '\0'};
+                (void)strcat(status->current, signal);
+            }
+#endif
+
+            (void)strcat(status->current, block->output);
+        }
+    }
+
+#if TRAILING_DELIMITER
+    if (status->current[0] != '\0') {
+        (void)strcat(status->current, DELIMITER);
+    }
+#endif
+
+    return has_status_changed(status);
+}
+
+int status_write(const status *const status, const bool is_debug_mode,
+                 x11_connection *const connection) {
+    if (is_debug_mode) {
+        (void)printf("%s\n", status->current);
+        return 0;
+    }
+
+    if (x11_set_root_name(connection, status->current) != 0) {
+        return 1;
+    }
+
+    return 0;
+}