funauxiliares2.c

#include "hsh.h"

/**
 * _realloc - reallocates a block of memory
 * @ptr: pointer to previous malloc'ated block
 * @old_size: byte size of previous block
 * @new_size: byte size of new block
 * Return: pointer to da ol'block nameen.
 */
void *_realloc(void *ptr, unsigned int old_size, unsigned int new_size)
{
	char *p;

	if (!ptr)
		return (malloc(new_size));
	if (!new_size)
		return (free(ptr), NULL);
	if (new_size == old_size)
		return (ptr);

	p = malloc(new_size);
	if (!p)
		return (NULL);

	old_size = old_size < new_size ? old_size : new_size;
	while (old_size--)
		p[old_size] = ((char *)ptr)[old_size];
	free(ptr);
	return (p);
}
/**
 * _strtoken - count tokens
 * @tokens: tokens
 * Return: number of tokens
 */
int _strtoken(char **tokens)
{
	int i;

	for (i = 0; tokens[i]; i++)
	{}
	return (i);
}