blob: 36c8458cee086820308152c64e25ab73a9b63d42 (
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
|
#include "regex.hh"
#include "types.hh"
namespace nix {
Regex::Regex(const string & pattern)
{
/* Patterns must match the entire string. */
int err = regcomp(&preg, ("^(" + pattern + ")$").c_str(), REG_NOSUB | REG_EXTENDED);
if (err) throw Error(format("compiling pattern ‘%1%’: %2%") % pattern % showError(err));
}
Regex::~Regex()
{
regfree(&preg);
}
bool Regex::matches(const string & s)
{
int err = regexec(&preg, s.c_str(), 0, 0, 0);
if (err == 0) return true;
else if (err == REG_NOMATCH) return false;
throw Error(format("matching string ‘%1%’: %2%") % s % showError(err));
}
string Regex::showError(int err)
{
char buf[256];
regerror(err, &preg, buf, sizeof(buf));
return string(buf);
}
}
|
