strings.c

#include "unixshell.h"

/**
 *_strchr - Locates a character in a string.
 *@s: The string to be searched.
 *@c: The character to be located.
 *
 *Return: If c is found - a pointer to the first occurence.
 *If c is not found - NULL.
 */

char *_strchr(const char *s, char c)
{
	int index;


	for (index = 0; s[index] != '\0'; index++)
	{
		if (s[index] == c)
			return ((char *)(s + index));
	}

	return (NULL);
}

/**
 * _strdup - returns a pointer to a newly allocated space in memory.
 * @str: string.
 *
 * Return: pointer of an array of chars
 */
char *_strdup(char *str)
{
	char *strout;
	unsigned int i, j;

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

	for (i = 0; str[i] != '\0'; i++)
		;

	strout = (char *)malloc(sizeof(char) * (i + 1));

	if (strout == NULL)
		return (NULL);

	for (j = 0; j <= i; j++)
		strout[j] = str[j];

	return (strout);
}

/**
 * _strlen - a function to return the length of a string
 * @str: the string
 *
 * Return: The length of the string
 *
 **/

int _strlen(char *str)
{
	int len = 0;

	while (*str)
	{
		len++;
		str++;
	}
	return (len);
}


/**
 * _strcmp - compare string values
 * @s1: input value
 * @s2: input value
 *
 * Return: s1[i] - s2[i]
 **/
int _strcmp(char *s1, char *s2)
{
	int i;

	i = 0;
	while (s1[i] != '\0' && s2[i] != '\0')
	{
		if (s1[i] != s2[i])
		{
			return (s1[i] - s2[i]);
		}
		i++;
	}
	return (0);

}

/**
 * _strcat - concatenates two strings
 * @dest: input value
 * @src: input value
 *
 * Return: a pointer to the concatenated string
 **/

char *_strcat(char *dest, char *src)
{
	int i;
	int j;

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