Data commit

Task/Array-concatenation/C/array-concatenation.c

@@ -0,0 +1,32 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define ARRAY_CONCAT(TYPE, A, An, B, Bn) \
+  (TYPE *)array_concat((const void *)(A), (An), (const void *)(B), (Bn), sizeof(TYPE));
+
+void *array_concat(const void *a, size_t an,
+                   const void *b, size_t bn, size_t s)
+{
+  char *p = malloc(s * (an + bn));
+  memcpy(p, a, an*s);
+  memcpy(p + an*s, b, bn*s);
+  return p;
+}
+
+// testing
+const int a[] = { 1, 2, 3, 4, 5 };
+const int b[] = { 6, 7, 8, 9, 0 };
+
+int main(void)
+{
+  unsigned int i;
+
+  int *c = ARRAY_CONCAT(int, a, 5, b, 5);
+
+  for(i = 0; i < 10; i++)
+    printf("%d\n", c[i]);
+
+  free(c);
+  return EXIT_SUCCCESS;
+}