Shell-I releaseshell-I

1 files changed, 43 insertions, 0 deletions

diff --git a/dynamic_array.c b/dynamic_array.c
new file mode 100644
index 0000000..5a24cb8
--- /dev/null
+++ b/dynamic_array.c
@@ -0,0 +1,43 @@
+#include "dynamic_array.h"
+#include <stdlib.h>
+
+void dynarr_create_array(struct dynamic_array *array)
+{
+    array->arr = calloc(initial_size, 1);
+    array->last_element_index = -1;
+    array->allocation_size = initial_size;
+}
+
+static void dynarr_allocate_memory(struct dynamic_array *array)
+{
+    char *new_arr = calloc(array->allocation_size * 2, 1);
+    dynarr_copy_array(array, new_arr);
+    free(array->arr);
+    array->arr = new_arr;
+    array->allocation_size *= 2;
+}
+
+void dynarr_push_back(struct dynamic_array *array, int letter)
+{
+    if(array->last_element_index+1 == array->allocation_size)
+        dynarr_allocate_memory(array);
+    ++array->last_element_index;
+    array->arr[array->last_element_index] = letter;
+}
+void dynarr_copy_array(struct dynamic_array *array, char *new_arr)
+{
+    int i;
+    for(i = 0; i <= array->last_element_index; ++i)
+        new_arr[i] = array->arr[i];
+}
+
+void dynarr_drop_word(struct dynamic_array *array)
+{
+    array->last_element_index = -1;
+}
+
+void dynarr_clear(struct dynamic_array *array)
+{
+    free(array->arr);
+    array->arr = NULL;
+}