blob: b0ef3cb5abe00f39365efd67c80eb54ed090510c (
plain)
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
|
#include <stddef.h>
#include "demo.h"
static void bad_input(void)
{
print("bad input");
}
static void unexpected_eof(void)
{
print("unexpected end-of-input");
}
int strcmp(const char *s1, const char *s2)
{
while (*s1 && *s1 == *s2)
s1++, s2++;
return (int)*(const unsigned char *)s1 - (int)*(const unsigned char *)s2;
}
char *strtok_input(char **tokens)
{
char *start = *tokens;
while (*start && *start == ' ')
++start;
if (!*start) {
*tokens = start;
return NULL;
}
char *end = start + 1;
while (*end && *end != ' ')
++end;
*tokens = *end ? end + 1 : end;
*end = '\0';
return start;
}
int parse_cpu_mask(char **tokens, unsigned *mask)
{
*mask = 0;
char *token;
while ((token = strtok_input(tokens))) {
if (token[0] != 'c' || token[1] != 'p' || token[2] != 'u'
|| !('0' <= token[3] && token[3] < '0' + NUM_CPUS) || token[4]) {
bad_input();
return -1;
}
*mask |= 1 << (token[3] - '0');
}
if (!*mask) {
print("must specify at least one cpu");
return -1;
}
return 0;
}
int parse_hex(char **tokens, unsigned *val)
{
char *token = strtok_input(tokens);
if (!token) {
unexpected_eof();
return -1;
} else if (token[0] != '0' || token[1] != 'x') {
bad_input();
return -1;
}
*val = 0;
char *c = &token[2];
unsigned nibbles = 0;
while (*c) {
*val <<= 4;
if ('0' <= *c && *c <= '9')
*val |= *c - '0';
else if ('a' <= *c && *c <= 'f')
*val |= *c - 'a' + 10;
else if ('A' <= *c && *c <= 'F')
*val |= *c - 'A' + 10;
++c;
++nibbles;
}
if (!nibbles || nibbles > 8) {
bad_input();
return -1;
}
return 0;
}
int parse_ptr(char **tokens, void **ptr)
{
unsigned ptr_val;
if (parse_hex(tokens, &ptr_val) < 0)
return -1;
*ptr = (void *)ptr_val;
return 0;
}
int parse_aligned(char **tokens, void **ptr)
{
if (parse_ptr(tokens, ptr) < 0)
return -1;
else if ((unsigned)*ptr & 0b11) {
print("unaligned address: %p", *ptr);
return -1;
}
return 0;
}
int expect_end(char **tokens)
{
char *token = strtok_input(tokens);
if (token) {
print("too many arguments starting from '%s'", token);
return -1;
}
return 0;
}
|
