_strtok.c

#include "shell.h"

/**
 * _strtok - tokenizes a string based on a delimiter
 *
 * @strn: string to operate
 * @delimiter: delimiter
 *
 * Return: pointer to string
 * or NULL if there is no match
 *
 */
char *_strtok(char *strn, const char *delimiter)
{
	char *str = strn;
	const char *org = delimiter;
	int isEqual = 1, isGetInto = 0;
	static char *step, *stepNull;
	static int isEnd;
	const char *delim = NULL;

	if (str)
		isEnd = 0;
	if (isEnd)
		return (NULL);
	step = (str) ? str : (stepNull + 1);
	if (str)
		stepNull = str;
	else
		str = step;
	while (*str && isEqual)
	{
	isEqual = 0;
	for (delim = org; *delim; delim++)
		if (*str == *delim)
			isEqual = 1;
	str = (!isEqual) ? str : str + 1, isEnd = (*str) ? 0 : 1;
	if (isEnd)
		return (NULL);
	}
	step = str;
	while (*str && !isEqual)
	{
	isEqual = 0;
	for (delim = org; *delim; delim++)
	if (*str == *delim)
	{
	isGetInto = 1, isEqual = 1, isEnd = (*(str + 1)) ? 0 : 1, *str = '\0';
	}
	str = (isEqual) ? str : str + 1;
	if (!isGetInto && !*str)
		isEnd = 1;
	}
	return (stepNull = str, step);
}