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atoi.c
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atoi.c
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#include "shell.h"
/**
* interactive - returns true if shell is interactive mode
* @info: struct address
* Return: 1 if interactive mode, 0 otherwise
*/
int interactive(info_t *info)
{
return (isatty(STDIN_FILENO) && info->readfd <= 2);
}
/**
* is_delim - checks if character is a delimeter
* @c: the char to check
* @delim: the delimeter string
* Return: 1 if true, 0 if false
*/
int is_delim(char c, char *delim)
{
while (*delim)
if (*delim++ == c)
return (1);
return (0);
}
/**
*_isalpha - checks for alphabetic character
*@c: The character to input
*Return: 1 if c is alphabetic, 0 otherwise
*/
int _isalpha(int c)
{
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
return (1);
else
return (0);
}
/**
*_atoi - converts a string to an integer
*@s: the string to be converted
*Return: 0 if no numbers in string, converted number otherwise
*/
int _atoi(char *s)
{
int i, sign = 1, flag = 0, output;
unsigned int result = 0;
for (i = 0; s[i] != '\0' && flag != 2; i++)
{
if (s[i] == '-')
sign *= -1;
if (s[i] >= '0' && s[i] <= '9')
{
flag = 1;
result *= 10;
result += (s[i] - '0');
}
else if (flag == 1)
flag = 2;
}
if (sign == -1)
output = -result;
else
output = result;
return (output);
}