fixed the TART_CELL_DATA_SIZE and used malloc in the test

source/tart.c

@@ -22,6 +22,7 @@ struct tart_window tart_create_window() {
     for(int g = 0; g < (window.size.x * window.size.y * sizeof(char) * TART_CELL_DATA_SIZE)+ 100; g++) {
         window.data[g] = '\0';
     }
+    window.data_count = (window.size.x * window.size.y * sizeof(char) * TART_CELL_DATA_SIZE)+ 100;
     return window;
 }
 
@@ -90,7 +91,7 @@ tart_byte tart_draw_window(struct tart_window * window, char* rend_buffer) {
             for (int x = 0; x < window->buffers[b].size.x; x++) {
                     // add data to window c buffer.
                     struct tart_cell cell = window->buffers[b].cells[(y*window->buffers[b].size.x) + x];
-                    char pre[20];
+                    char pre[TART_CELL_DATA_SIZE];
                     int size = sprintf(pre, "\033[%d;%d;%dm%c\033[0;0m", (int)cell.style, cell.foreground, cell.background, cell.display);
                     for(int preIdx = 0; preIdx < size; preIdx++) {
                         window->data[(y*window->buffers[b].size.x) + x + offset] = pre[preIdx];
@@ -106,7 +107,7 @@ tart_byte tart_draw_window(struct tart_window * window, char* rend_buffer) {
             i++;
         }
     }
-    fwrite(window->data, sizeof(char), (window->size.x * window->size.y * sizeof(char))+ 100 , stdout);
+    fwrite(window->data, sizeof(char), window->data_count, stdout);
     return TART_OK;
 };