written by the boss

pseudocode.c

typedef struct {
  int pos;
  int size;
  char *data;
} stack;

#define INITIAL_SIZE 1024

stack *init_stack() {
  pos = 0;
  size = INITIAL_SIZE;
  data = calloc(sizeof(char) * INITIAL_SIZE);
}

void push(stack *stack, char *what) {
  if(stack->pos == stack->size) {
    stack->size	*= 2;
    stack->data = realloc(stack->data, stack->size);
  }