strtok.c

#include "holberton.h"
/**
 * check_match - checks if c is equal to a given char of a string
 * @c: character to be compared
 * @str: input string
 * Return: Always 0
 */
unsigned int check_match(char c, const char *str)
{
	unsigned int i;

	for (i = 0; str[i] != '\0'; i++)
	{
		if (c == str[i])
		return (1);
	}
return (0);
}
/**
 * _strtok - breaks a string into a seq. of zero or nonempty tokens
 * @str: string to be parsed
 * @delim: delimit the token in the parsed string
 * Return: returns a pointer to a null-terminated string
 */
char *_strtok(char *str, const char *delim)
{
	static char *token_start;
	static char *next_token;
	unsigned int i;

	if (str != NULL)
		next_token = str;
	token_start = next_token;
	if (token_start == NULL)
		return (NULL);
	for (i = 0; next_token[i] != '\0'; i++)
	{
		if (check_match(next_token[i], delim) == 0)
			break;
	}
	if (next_token[i] == '\0' || next_token[i] == '#')
	{
		next_token = NULL;
		return (NULL);
	}
	token_start = next_token + i;
	next_token = token_start;
	for (i = 0; next_token[i] != '\0'; i++)
	{
		if (check_match(next_token[i], delim) == 1)
			break;
	}
	if (next_token[i] == '\0')
		next_token = NULL;
	else
	{
		next_token[i] = '\0';
		next_token = next_token + i + 1;
		if (*next_token == '\0')
			next_token = NULL;
	}
return (token_start);
}