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
|
struct Argv {
public:
Argv() : Argv({"node", "-p", "process.version"}) {}
Argv(const std::initializer_list<const char*> &args) {
nr_args_ = args.size();
int total_len = 0;
for (auto it = args.begin(); it != args.end(); ++it) {
total_len += strlen(*it) + 1;
}
argv_ = static_cast<char**>(malloc(nr_args_ * sizeof(char*)));
argv_[0] = static_cast<char*>(malloc(total_len));
int i = 0;
int offset = 0;
for (auto it = args.begin(); it != args.end(); ++it, ++i) {
int len = strlen(*it) + 1;
snprintf(argv_[0] + offset, len, "%s", *it);
// Skip argv_[0] as it points the correct location already
if (i > 0) {
argv_[i] = argv_[0] + offset;
}
offset += len;
}
}
~Argv() {
free(argv_[0]);
free(argv_);
}
int nr_args() const {
return nr_args_;
}
char** operator*() const {
return argv_;
}
private:
char** argv_;
int nr_args_;
};
|
