str_help2.c

#include "shell.h"

/**
 * *_strcpy - copies the string pointed to by src,
 * including the terminating null byte
 * @dest: copied string
 * @src: string to be copied
 * Return: pointer to new copied string
 */
char *_strcpy(char *dest, char *src)
{
	char *ptr = dest;

	while (*src)
	*dest++ = *src++;
	*dest = 0;
	return (ptr);
}


/**
 * _strtok - tokenizes strings at delimiter
 * @str: input string
 * @delim: delimiter
 * Return: pointer to start of string
 */

char *_strtok(char *str, char *delim)
{
	static char *lastptr;
	char ch;

	if (str == NULL)
	str = lastptr;
	do {
	ch = *str++;
	if (!ch)
	return (NULL);
	} while (_strchr(delim, ch));
	str--;
	lastptr = str + _strcspn(str, delim);
	if (*lastptr)
	*lastptr++ = 0;
	return (str);
}

/**
 * _strcspn - returns first occurence of any char in
 * second string in first string
 * @string: input string to search
 * @chars: input chars to check
 * Return: pointer to first match
 */
int _strcspn(char *string, char *chars)
{
	char c;
	char *p, *s;

	for (s = string, c = *s; c; s++, c = *s)
	for (p = chars; *p; p++)
	if (c == *p)
	return (s - string);
	return (s - string);
}

/**
 * _strchr - locates a character in a string
 * @s: string to be searched
 * @c: target char
 * Return: pointer to first occurrence of c or NULL if char not found
 */
char *_strchr(char *s, char c)
{
	char x;

	while (true)
	{
	x = *s++;
	if (x == c)
	return (s - 1);
	if (!x)
	return (NULL);
	}
}