str_func2.c

#include "s_shell.h"

/**
 * _strcpy - copies a string
 * @dest: the destination
 * @src: the source
 *
 * Return: pointer to destination
 */
char *_strcpy(char *dest, char *src)
{
	int index = 0;

	if (dest == src || src == NULL)
		return (dest);

	while (src[index])
	{
		dest[index] = src[index];
		index++;
	}

	dest[index] = '\0';
	return (dest);
}

/**
 * _strncpy - copies a string
 * @dest: the destination
 * @src: the source
 * @n: the amount of characters to be copied
 *
 * Return: the concatenated string
 */
char *_strncpy(char *dest, char *src, int n)
{
	int i, j;
	char *result = dest;

	i = 0;
	while (src[i] != '\0' && i < n - 1)
	{
		dest[i] = src[i];
		i++;
	}

	if (i < n)
	{
		j = i;
		while (j < n)
		{
			dest[j] = '\0';
			j++;
		}
	}

	return (result);
}

/**
 * _strdup - duplicates a string
 * @str: the string to be duplicated
 *
 * Return: pointer to the duplicated string
 */
char *_strdup(const char *str)
{
	int length = 0;
	char *result;

	if (str == NULL)
		return (NULL);

	while (*str++)
		length++;

	result = malloc(sizeof(char) * (length + 1));

	if (!result)
		return (NULL);

	for (length++; length--;)
		result[length] = *--str;

	return (result);
}

/**
 * _strncat - concatenates two strings
 * @dest: the first string
 * @src: the second string
 * @n: amount of bytes to be maximally used
 *
 * Return: concatenated string
 */
char *_strncat(char *dest, char *src, int n)
{
	int i, j;
	char *result = dest;

	i = 0;
	j = 0;

	while (dest[i] != '\0')
		i++;

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

	if (j < n)
		dest[i] = '\0';

	return (result);
}

/**
 * _puts - prints an input string
 * @str: string to be printed
 *
 * Return: Nothing
 */
void _puts(char *str)
{
	int index = 0;

	if (!str)
		return;

	while (str[index] != '\0')
	{
		_putchar(str[index]);
		index++;
	}
}