change to dynamic array for lexer and parser to speed up lexical analysis

src/dynamic_array/darray.c

@@ -0,0 +1,78 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "darray.h"
+
+void darray_init(DArray *arr, size_t element_size) {
+    arr->element_size = element_size;
+    arr->size = 0;
+    arr->capacity = CHUNK_SIZE;
+    arr->data = malloc(CHUNK_SIZE * element_size);
+    if (!arr->data) {
+        fprintf(stderr, "darray_init: allocation failed\n");
+        exit(EXIT_FAILURE);
+    }
+}
+
+void darray_resize(DArray *arr, size_t new_size) {
+    size_t new_capacity = ((new_size + CHUNK_SIZE - 1) / CHUNK_SIZE) * CHUNK_SIZE;
+
+    if (new_capacity != arr->capacity) {
+        void *new_data = realloc(arr->data, new_capacity * arr->element_size);
+        if (!new_data) {
+            fprintf(stderr, "darray_resize: reallocation failed\n");
+            exit(EXIT_FAILURE);
+        }
+        arr->data = new_data;
+        arr->capacity = new_capacity;
+    }
+
+    arr->size = new_size;
+}
+
+void darray_push(DArray *arr, void *element) {
+    if (arr->size >= arr->capacity) {
+        darray_resize(arr, arr->size + 1);
+    } else {
+        arr->size++;
+    }
+
+    void *target = (char *)arr->data + (arr->size - 1) * arr->element_size;
+    memcpy(target, element, arr->element_size);
+}
+
+void darray_pop(DArray *arr, void (*free_data)(void *)) {
+    if (arr->size == 0)
+        return;
+
+    arr->size--;
+
+    if (free_data) {
+        void *target = (char *)arr->data + arr->size * arr->element_size;
+        free_data(target);
+    }
+
+    darray_resize(arr, arr->size);
+}
+
+void *darray_get(DArray *arr, size_t index) {
+    if (index >= arr->size) {
+        fprintf(stderr, "darray_get: index out of bounds\n");
+        exit(EXIT_FAILURE);
+    }
+    return (char *)arr->data + index * arr->element_size;
+}
+
+void darray_free(DArray *arr, void (*free_data)(void *)) {
+    if (free_data) {
+        for (size_t i = 0; i < arr->size; ++i) {
+            void *element = (char *)arr->data + i * arr->element_size;
+            free_data(element);
+        }
+    }
+    free(arr->data);
+    arr->data = NULL;
+    arr->size = 0;
+    arr->capacity = 0;
+    arr->element_size = 0;
+}