strfunctions.c

#include "holberton.h"
/**
 * _strlen - returns the length of a string
 * @s: char array pointer
 * Return: On success 1.
 * On error, -1 is returned, and errno is set appropriately.
 */
int _strlen(const char *s)
{
	int i = 0;

	while (s[i] != '\0')
	{
		i++;
	}

	return (i);
}


/**
 * *_strncat - concatenate strings
 * @dest: array
 * @src: array
 * @n: numers os bytes to concatenate
 * Return: Always 0.
 */
char *_strncat(char *dest, char *src, int n)
{
	int i, j;

	for (i = 0; dest[i] != '\0'; i++)
		;
	for (j = 0; j < n && src[j] != '\0'; j++)
		dest[i + j] = src[j];
	dest[i + j] = '\0';

	return (dest);
}

/**
 * *_strcpy - reverses a string
 * @dest: char array destiny
 * @src: array in
 * Return: On success 1.
 * On error, -1 is returned, and errno is set appropriately.
 */

char *_strcpy(char *dest, char *src)
{
int i = 0;


	while (src[i] != '\0')
	{
		dest[i] = src[i];
		i++;
	}
	dest[i] = src[i];
	return (src);
}


/**
 * _strcmp - compare strings
 * @s1: array
 * @s2: array
 * Return: Always 0.
 */
int _strcmp(char *s1, char *s2)
{
	int i = 0;

	while ((s1[i] == s2[i]) && (s1[i] != '\0') && (s2[i] != '\0'))
	i++;

	return (s1[i] - s2[i]);
}



/**
 * *_strdup - create array
 * @str: input array
 * Return: null in error
 */
char *_strdup(char *str)
{
	int i = 0, size = 0;
	char *str_;

	if (str == NULL)
		return (NULL);
	while (*(str + size))
		size++;
	size++;
	str_ = malloc(sizeof(char) * size);
	if (str_ == NULL)
		return (NULL);
	while (i < size)
	{
		*(str_ + i) = *(str + i);
		i++;
	}
	return (str_);
}