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_strtok.c
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_strtok.c
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#include "shell.h"
/**
* strtok - tokenizes a string
* @str: string to tokenize
* @delim: delimiters used to create tokens
* Return: token
*/
char *strtok(char *str, char *delim)
{
static char *saved_string;
int i;
int j;
char *tmp_str;
char *tmp_delim;
/*if NULL passed in str becomes where saved string left off*/
if (str == 0)
str = saved_string;
if (str == 0)
return (0);
tmp_str = str;
tmp_delim = delim;
/*skip initial delimiters*/
i = 0;
while (tmp_str[i] != 0)
{
j = 0;
while (delim[j] != 0)
{
if (tmp_str[i] == tmp_delim[j])
break;
j++;
}
if (tmp_delim[j] == 0)
break;
i++;
}
str = str + i;
if (*str == 0)
{
saved_string = str;
return (0);
}
/*start new token*/
tmp_str = tmp_str + i;
i = 0;
while (tmp_str[i] != 0)
{
j = 0;
while (tmp_delim[j] != 0)
{
if (tmp_str[i] == tmp_delim[j])
break;
j++;
}
if (tmp_delim[j] != 0)
break;
i++;
}
saved_string = tmp_str;
if (tmp_str[i] != 0)
{
/*saves string for next call*/
saved_string = (saved_string + i + 1);
tmp_str[i] = '\0';
}
else
{
saved_string = '\0'; /*if end of input string.*/
}
return (tmp_str);
}
/**
* strtokqe - string token with quotes and escapes
* @str: string
* @delim: delimiters
* @escflags: escape flags
* flags are bitwise.
* 1 = use \ to escape delims
* 2 = single quote skips
* 4 = double quote skips
* Return: string
*/
char *strtokqe(char *str, char *delim, int escflags)
{
static char *saved_string;
int i;
int j;
/*if NULL passed in str becomes where saved string left off*/
if (str == 0)
str = saved_string;
if (str == 0)
return (0);
/*skip initial delimiters*/
i = 0;
while (str[i] != 0)
{
j = 0;
while (delim[j] != 0)
{
if (str[i] == delim[j])
break;
j++;
}
if (delim[j] == 0)
break;
i++;
}
str = str + i;
if (*str == 0)
{
saved_string = str;
return (0);
}
/*start new token*/
i = 0;
while (str[i] != 0)
{
if (str[i] == '\\' && escflags & 1)
{
if (str[i + 1] != 0)
i++;
i++;
continue;
}
if (str[i] == '\'' && escflags & 2)
{
i++;
while (str[i] != '\'')
{
if (str[i] == '\\' && escflags & 1)
{
if (str[i + 1] != 0)
i++;
i++;
continue;
}
i++;
}
}
if (str[i] == '"' && escflags & 4)
{
i++;
while (str[i] != '"')
{
if (str[i] == '\\' && escflags & 1)
{
if (str[i + 1] != 0)
i++;
i++;
continue;
}
i++;
}
}
j = 0;
while (delim[j] != 0)
{
if (str[i] == delim[j])
break;
j++;
}
if (delim[j] != 0)
break;
i++;
}
saved_string = str;
if (str[i] != 0)
{
/*saves string for next call*/
saved_string = (saved_string + i + 1);
str[i] = '\0';
}
else
{
saved_string = '\0'; /*if end of input string.*/
}
return (str);
}