Shorten the code using the err() function.

XAlloc.c

@@ -5,22 +5,24 @@
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif
-#include <unistd.h>
+#include <err.h>
+#include <stdlib.h>
 #include <string.h>
 
 /*{
 #include <stdlib.h>
 }*/
 
-static char oomMessage[] = "Out of memory!\n";
+static inline void fail() {
+   curs_set(1);
+   endwin();
+   err(1, NULL);
+}
 
 void* xMalloc(size_t size) {
    void* data = malloc(size);
    if (!data && size > 0) {
-      curs_set(1);
-      endwin();
-      write(2, oomMessage, sizeof oomMessage - 1);
-      exit(1);
+      fail();
    }
    return data;
 }
@@ -28,10 +30,7 @@ void* xMalloc(size_t size) {
 void* xCalloc(size_t nmemb, size_t size) {
    void* data = calloc(nmemb, size);
    if (!data) {
-      curs_set(1);
-      endwin();
-      write(2, oomMessage, sizeof oomMessage - 1);
-      exit(1);
+      fail();
    }
    return data;
 }
@@ -39,10 +38,7 @@ void* xCalloc(size_t nmemb, size_t size) {
 void* xRealloc(void* ptr, size_t size) {
    void* data = realloc(ptr, size);
    if (!data && size > 0) {
-      curs_set(1);
-      endwin();
-      write(2, oomMessage, sizeof oomMessage - 1);
-      exit(1);
+      fail();
    }
    return data;
 }
@@ -50,10 +46,7 @@ void* xRealloc(void* ptr, size_t size) {
 char* xStrdup(const char* str) {
    char* data = strdup(str);
    if (!data && str) {
-      curs_set(1);
-      endwin();
-      write(2, oomMessage, sizeof oomMessage - 1);
-      exit(1);
+      fail();
    }
    return data;
 }