-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathmatch.c
126 lines (108 loc) · 2.92 KB
/
match.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
#include <stdio.h>
#include <stdlib.h>
int strlength(char* string, int length){
if (string[0] == '\0')
return length;
return strlength(string+1, length+1);
}
int match(char* string, char* star) {
// version #1
if (string[0] == '\0' && star[0] == '\0')
return 1;
if (star[0] == '*')
return match(string, star+1);
if (string[0] == '\0')
return 0;
if (string[0] == star[0]){
if (star[-1] == '*') {
if (!match(string+1, star+1))
return match(string+1, star);
}
return match(string+1, star+1);
}
if (string[0] != star[0] && star[-1] == '*')
return match(string+1, star);
return 0;
// version #2
// int i;
// for (i = 0; star[i] != '\0'; i += 1) {
// if (star[i] != '*') {
// if (string[i] != star[i])
// return 0;
// }
// else {
// int good = 0;
// int j;
// for (j = i; string[j] != '\0' && !good; j += 1)
// good = match(string + j, star + i + 1);
// if (!good)
// good = match(string + j, star + i + 1);
// return good;
// }
// }
// return (string[i] == star[i]);
}
int count_match(char* string, char* star) {
int i;
for (i = 0; star[i] != '\0'; i += 1) {
if (star[i] != '*') {
if (string[i] != star[i])
return 0;
}
else {
int count = 0;
int j;
for (j = i; string[j] != '\0'; j += 1)
count += count_match(string + j, star + i + 1);
count += count_match(string + j, star + i + 1);
return count;
}
}
return (string[i] == star[i]);
}
int main(int argc, char *argv[]) {
if (argc == 3) {
int l1 = strlength(argv[1], 0);
char* string = (char*) malloc(sizeof(char)*(l1+1));
for (int i = 0; i < l1; i += 1)
string[i] = argv[1][i];
string[l1] = '\0';
int l2 = strlength(argv[2], 0);
char* star = (char*) malloc(sizeof(char)*(l2+1));
for (int i = 0; i < l2; i = i+1)
star[i] = argv[2][i];
star[l2] = '\0';
// version #1
if (star[0] != '*' && string[0] != star[0])
printf("%d\n", 0);
else if (star[0] == '*')
printf("%d\n", match(string, star+1));
else if (string[0] == star[0])
printf("%d\n", match(string+1, star+1));
// version #2
// printf("%d\n", match(string, star));
free(string); free(star);
}
if (argc == 4) {
int l1 = strlength(argv[1], 0);
char* string = (char*) malloc(sizeof(char)*(l1+1));
for (int i = 0; i < l1; i += 1)
string[i] = argv[1][i];
string[l1] = '\0';
int l2 = strlength(argv[2], 0);
char* star = (char*) malloc(sizeof(char)*(l2+1));
for (int i = 0; i < l2; i += 1)
star[i] = argv[2][i];
star[l2] = '\0';
int l3 = strlength(argv[3], 0);
char* option = (char*) malloc(sizeof(char)*(l3+1));
for (int i = 0; i < l3; i += 1)
option[i] = argv[3][i];
option[l3] = '\0';
if (option[0] == '-' && option[1] == 'c' && option[3] == '\0') {
printf("%d\n", count_match(string, star));
}
free(string); free(star); free(option);
}
return 0;
}