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_strtok.c
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_strtok.c
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#include "shell.h"
/**
* _strtok - strtok function implementation.
*@str: str to tokenize.
*@delim: delimeter.
* Return: an array of strings.
*/
char **_strtok(char *str, char *delim)
{
char **strings = NULL;
char *temp, *copy = NULL;
int i, j, num_tokens = 0;
if (!str)
return (NULL);
copy = strdup(str);
if (!copy)
exit(EXIT_FAILURE);
temp = strtok(copy, delim);
while (temp != NULL) /* Count the no of tokens to allocate mem for string */
{
num_tokens++;
temp = strtok(NULL, delim);
}
free(copy);
strings = malloc(sizeof(char *) * (num_tokens + 1));
/* Allocate memory for strings array */
if (!strings)
exit(EXIT_FAILURE);
temp = strtok(str, delim); /* Tokenize the input string */
while (temp != NULL)
{
strings[i] = strdup(temp);
if (!strings[i])
{
for (j = 0; j < i; j++)
free(strings[j]);
/* If memory allocation fails, free all previously allocated memory and exit */
free(strings);
exit(EXIT_FAILURE);
}
i++;
temp = strtok(NULL, delim);
}
strings[i] = NULL;
/* print_token(strings); */
return (strings);
}
/**
* free_tokens - Function to free the memory allocated by _strtok.
* @tokens: tokens to free.
*/
void free_tokens(char **tokens)
{
unsigned int i;
if (!tokens)
return;
for (i = 0; tokens[i]; i++)
free(tokens[i]);
free(tokens);
}
/**
* print_token - A function to print an array of strings
* @token: strings to print
*/
void print_token(char **token)
{
int i = 0;
while (token[i])
{
printf("token[%d] = %s\n", i, token[i]);
i++;
}
}