Replace samples for C language

samples/C/array.h

@@ -0,0 +1,58 @@
+#ifndef ARRAY_H
+#define ARRAY_H value
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define array(type, name, initial_length) \
+    type *name = __array_alloc(sizeof(type), initial_length)
+
+#define aforeach(it, array) \
+    for (unsigned it = 0; \
+            it < alength(array); \
+            ++it)
+
+#define __header(array) \
+    ((struct __array_header *) array - 1)
+
+#define alength(array) \
+    (__header(array)->length)
+
+#define afree(array) \
+    free(__header(array))
+
+#define apush(array, elem) \
+    __array_resize((void **) &array, sizeof *array, 1); \
+    array[alength(array)-1] = elem
+
+#define apop(array) \
+    aremove(array, (alength(array) - 1))
+
+#define aremove(array, index) \
+    assert(alength(array) > index); \
+    memmove(array + index, array + index + 1, sizeof *array * (alength(array) - index - 1)); \
+    __array_resize((void **) &array, sizeof *array, -1)
+
+#define ainsert(array, index, elem) \
+    __array_resize((void **) &array, sizeof *array, index >= alength(array) ? index - alength(array) + 1 : 1); \
+    memmove(array + index + 1, array + index, sizeof *array * (alength(array) - index - 1)); \
+    array[index] = elem
+
+#define acontains(array, elem) \
+    __array_search(array, &elem, sizeof elem)
+
+#define __arrayallocated(array) \
+    (__header(array)->allocated)
+
+struct __array_header {
+    unsigned length;
+    unsigned allocated;
+};
+
+unsigned __bump_up(unsigned n);
+void *__array_alloc(size_t size, unsigned length);
+void __array_resize(void **array, size_t size, int difference);
+int __array_search(void *array, void *elem, size_t size);
+
+#endif /* ifndef ARRAY_H */