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authorBoris Kolpackov <boris@codesynthesis.com>2015-12-07 12:16:29 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2015-12-07 12:16:29 +0200
commit8b55e8151bd69e4ef11a67aff57618193f559618 (patch)
treee420000affbf3c6d7016470649d2cc711b883c7a /build/utility.cxx
parentc092793e74d0778b0aff653860f274c8cc31c374 (diff)
Add support for specifying minimum required build2 version
The syntax is: using build@0.1.0-a1 The idea is that we will later also use it for modules and 'build' is a special, the "build system itself" module. Also fix a problem with peeking and lexer mode switching.
Diffstat (limited to 'build/utility.cxx')
-rw-r--r--build/utility.cxx78
1 files changed, 78 insertions, 0 deletions
diff --git a/build/utility.cxx b/build/utility.cxx
index d394186..7ee679b 100644
--- a/build/utility.cxx
+++ b/build/utility.cxx
@@ -4,6 +4,8 @@
#include <build/utility>
+#include <cstdlib> // strtol()
+
using namespace std;
namespace build
@@ -12,5 +14,81 @@ namespace build
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;
+
+ 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;
}