functions3.c

#include "shell.h"

/**
 * _strcmp - Compares two strings.
 * @s1: The first string to compare.
 * @s2: The second string to compare.
 * Return: An integer indicating the comparison result.
 */
int _strcmp(const char *s1, const char *s2)
{
	while (*s1 != '\0' || *s2 != '\0')
	{
		if (*s1 != *s2)
		{
			return (*s1 - *s2);
		}
		s1++;
		s2++;
	}
	return (0);
}

/**
 * _strncmp - Compares two strings up to a specified length.
 * @s1: The first string to compare.
 * @s2: The second string to compare.
 * @n: The maximum number of characters to compare.
 * Return: An integer indicating the comparison result.
 */
int _strncmp(const char *s1, const char *s2, size_t n)
{
	while (n > 0 && (*s1 != '\0' || *s2 != '\0'))
	{
		if (*s1 != *s2)
		{
			return (*s1 - *s2);
		}
		s1++;
		s2++;
		n--;
	}
	return (0);
}

/**
 * _strncpy - Copies a string up to a specified length.
 * @dest: The destination buffer.
 * @src: The source string to be copied.
 * @n: The maximum number of characters to copy.
 * Return: A pointer to the destination buffer.
 */
char *_strncpy(char *dest, const char *src, size_t n)
{
	char *original_dest = dest;

	while (n > 0 && *src != '\0')
	{
		*dest = *src;
		dest++;
		src++;
		n--;
	}
	while (n > 0)
	{
		*dest = '\0';
		dest++;
		n--;
	}
	return (original_dest);
}

/**
 * _strcpy - Copies a string from source to destination.
 * @dest: The destination buffer.
 * @src: The source string to be copied.
 * Return: A pointer to the destination buffer.
 */
char *_strcpy(char *dest, const char *src)
{
	char *original_dest = dest;

	while (*src != '\0')
	{
		*dest = *src;
		dest++;
		src++;
	}
	*dest = '\0';
	return (original_dest);
}

/**
 * _strlen - Calculates the length of a string.
 * @str: The string to be measured.
 * Return: The length of the string.
 */
size_t _strlen(const char *str)
{
	size_t len = 0;

	while (str[len] != '\0')
	{
		len++;
	}
	return (len);
}