-
Notifications
You must be signed in to change notification settings - Fork 0
/
_string_to_int.c
executable file
·140 lines (127 loc) · 2.5 KB
/
_string_to_int.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
#include "eshell.h"
/**
* _string_to_int - converts a string to an integer
* @s: the string to be converted
* Return: 0 if no numbers in string, converted number otherwise
* -1 on error
*/
int _string_to_int(char *s)
{
int i = 0;
unsigned long int result = 0;
if (*s == '+')
s++; /* TODO: why does this make main return 255? */
for (i = 0; s[i] != '\0'; i++)
{
if (s[i] >= '0' && s[i] <= '9')
{
result *= 10;
result += (s[i] - '0');
if (result > INT_MAX)
return (-1);
}
else
return (-1);
}
return (result);
}
/**
* print_the_error - prints an error message
* @desc: the parameter & return desc struct
* @estr: string containing specified error type
* Return: 0 if no numbers in string, converted number otherwise
* -1 on error
*/
void print_the_error(desc_t *desc, char *estr)
{
input_e(desc->fname);
input_e(": ");
print_d(desc->line_count, STDERR_FILENO);
input_e(": ");
input_e(desc->argv[0]);
input_e(": ");
input_e(estr);
}
/**
* print_d - function prints a decimal (integer) number (base 10)
* @input: the input
* @fd: the filedescriptor to write to
*
* Return: number of characters printed
*/
int print_d(int input, int fd)
{
int (*__putchar)(char) = _putchar;
int i, count = 0;
unsigned int _abs_, current;
if (fd == STDERR_FILENO)
__putchar = _errorchar;
if (input < 0)
{
_abs_ = -input;
__putchar('-');
count++;
}
else
_abs_ = input;
current = _abs_;
for (i = 1000000000; i > 1; i /= 10)
{
if (_abs_ / i)
{
__putchar('0' + current / i);
count++;
}
current %= i;
}
__putchar('0' + current);
count++;
return (count);
}
/**
* convert_number - converter function, a clone of itoa
* @num: number
* @base: base
* @flags: argument flags
*
* Return: string
*/
char *convert_number(long int num, int base, int flags)
{
static char *array;
static char buffer[50];
char sign = 0;
char *ptr;
unsigned long n = num;
if (!(flags & CONVERT_INTO_UNSIGNED) && num < 0)
{
n = -num;
sign = '-';
}
array = flags & CONVERT_TO_SMALL ? "0123456789abcdef" : "0123456789ABCDEF";
ptr = &buffer[49];
*ptr = '\0';
do {
*--ptr = array[n % base];
n /= base;
} while (n != 0);
if (sign)
*--ptr = sign;
return (ptr);
}
/**
* remove_comments - function replaces first instance of '#' with '\0'
* @buf: address of the string to modify
*
* Return: Always 0;
*/
void remove_comments(char *buf)
{
int i;
for (i = 0; buf[i] != '\0'; i++)
if (buf[i] == '#' && (!i || buf[i - 1] == ' '))
{
buf[i] = '\0';
break;
}
}