minishell/quote.c at master · AliceFromWardenfell/minishell · GitHub

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
#include "minishell.h"

static void	flag_check(char c, unsigned char *flag)
{
	if (c == '\"' && !(*flag & 1) && !(*flag & 2))
		*flag = *flag | 1;
	else if (c == '\"' && (*flag & 1))
		*flag = *flag ^ 1;
	else if (c == '\'' && !(*flag & 1) && !(*flag & 2))
		*flag = *flag | 2;
	else if (c == '\'' && (*flag & 2))
		*flag = *flag ^ 2;
}

int	quote_check(char *str)
{
	unsigned char	flag;

	flag = 0;
	while (*str)
	{
		flag_check(*str, &flag);
		str++;
	}
	if (flag != 0)
		return (0);
	return (1);
}

static int	quote_count(char *str)
{
	int				res;
	unsigned char	flag;

	res = 0;
	flag = 0;
	while (*str)
	{
		if ((*str == '\"' || *str == '\'') && flag == 0)
			res++;
		flag_check(*str, &flag);
		str++;
	}
	return (res);
}

static void	set_char(char c, t_char *ch, unsigned char flag)
{
	if ((c == '\"' && (flag & 1)) || (c == '\'' && (flag & 2)))
	{
		ch->c = -1;
		ch->escaped = -1;
	}
	else if (c == '$' && (flag & 2))
	{
		ch->c = c;
		ch->escaped = 2;
	}
	else if (flag != 0)
	{
		ch->c = c;
		ch->escaped = 1;
	}
	else
	{
		ch->c = c;
		ch->escaped = 0;
	}
}

t_char	*unquote(char *str)
{
	t_char			*res;
	unsigned char	flag;
	size_t			i;

	res = (t_char *)malloc(sizeof(t_char) * (ft_strlen(str)
				- quote_count(str) + 1));
	if (!res)
		return (NULL);
	i = 0;
	flag = 0;
	while (*str)
	{
		if ((*str == '\"' || *str == '\'') && flag == 0)
			;
		else
			set_char(*str, &(res[i++]), flag);
		flag_check(*str, &flag);
		str++;
	}
	res[i].c = '\0';
	res[i].escaped = -1;
	return (res);
}