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// file : build/utility.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <build/utility>
#include <cstdlib> // strtol()
using namespace std;
namespace build
{
const string empty_string;
const path empty_path;
const dir_path empty_dir_path;
unsigned int
to_version (const string& s)
{
// See tests/version.
//
auto parse = [&s] (size_t& p, const char* m, long min = 0, long max = 99)
-> unsigned int
{
if (s[p] == '-' || s[p] == '+') // stoi() allows these.
throw invalid_argument (m);
const char* b (s.c_str () + p);
char* e;
long r (strtol (b, &e, 10));
if (b == e || r < min || r > max)
throw invalid_argument (m);
p = e - s.c_str ();
return static_cast<unsigned int> (r);
};
auto bail = [] (const char* m) {throw invalid_argument (m);};
unsigned int ma, mi, bf, ab (0);
size_t p (0), n (s.size ());
ma = parse (p, "invalid major version");
if (p >= n || s[p] != '.')
bail ("'.' expected after major version");
mi = parse (++p, "invalid minor version");
if (p >= n || s[p] != '.')
bail ("'.' expected after minor version");
bf = parse (++p, "invalid bugfix version");
if (p < n)
{
if (s[p] != '-')
bail ("'-' expected after bugfix version");
char k (s[++p]);
if (k != 'a' && k != 'b')
bail ("'a' or 'b' expected in release component");
ab = parse (++p, "invalid release component", 1, 49);
if (p != n)
bail ("junk after release component");
if (k == 'b')
ab += 50;
}
// AABBCCDD
unsigned int r (ma * 1000000U +
mi * 10000U +
bf * 100U);
if (ab != 0)
{
if (r == 0)
bail ("0.0.0 version with release component");
r -= 100;
r += ab;
}
return r;
}
bool exception_unwinding_dtor = false;
}
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