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-rw-r--r--libbuild2/functions-builtin.cxx55
-rw-r--r--libbuild2/utility.hxx1
-rw-r--r--libbuild2/variable.cxx42
3 files changed, 85 insertions, 13 deletions
diff --git a/libbuild2/functions-builtin.cxx b/libbuild2/functions-builtin.cxx
index 93f2d0f..5129a05 100644
--- a/libbuild2/functions-builtin.cxx
+++ b/libbuild2/functions-builtin.cxx
@@ -32,6 +32,56 @@ namespace build2
return r;
};
+ static const char hex_digits[] = "0123456789abcdef";
+
+ static string
+ to_string (uint64_t i, optional<value> base, optional<value> width)
+ {
+ uint64_t b (base ? convert<uint64_t> (move (*base)) : 10);
+ size_t w (width
+ ? static_cast<size_t> (convert<uint64_t> (move (*width)))
+ : 0);
+
+ // One day we can switch to C++17 std::to_chars().
+ //
+ string r;
+ switch (b)
+ {
+ case 10:
+ {
+ r = to_string (i);
+ if (w > r.size ())
+ r.insert (0, w - r.size (), '0');
+ break;
+ }
+ case 16:
+ {
+ r.reserve (18);
+ r += "0x";
+
+ for (size_t j (64); j != 0; )
+ {
+ j -= 4;
+ size_t d ((i >> j) & 0x0f);
+
+ // Omit leading zeros but watch out for the i==0 corner case.
+ //
+ if (d != 0 || r.size () != 2 || j == 0)
+ r += hex_digits[d];
+ }
+
+ if (w > r.size () - 2)
+ r.insert (2, w - (r.size () - 2), '0');
+
+ break;
+ }
+ default:
+ throw invalid_argument ("unsupported base");
+ }
+
+ return r;
+ }
+
void
builtin_functions (function_map& m)
{
@@ -77,7 +127,10 @@ namespace build2
//
f["string"] += [](bool b) {return b ? "true" : "false";};
f["string"] += [](int64_t i) {return to_string (i);};
- f["string"] += [](uint64_t i) {return to_string (i);};
+ f["string"] += [](uint64_t i, optional<value> base, optional<value> width)
+ {
+ return to_string (i, move (base), move (width));
+ };
// Quote a value returning its string representation. If escape is true,
// then also escape (with a backslash) the quote characters being added
diff --git a/libbuild2/utility.hxx b/libbuild2/utility.hxx
index c82dcc2..a285b03 100644
--- a/libbuild2/utility.hxx
+++ b/libbuild2/utility.hxx
@@ -69,6 +69,7 @@ namespace build2
using butl::alpha;
using butl::alnum;
using butl::digit;
+ using butl::wspace;
using butl::trim;
using butl::next_word;
diff --git a/libbuild2/variable.cxx b/libbuild2/variable.cxx
index 4bd01dc..9cdad0b 100644
--- a/libbuild2/variable.cxx
+++ b/libbuild2/variable.cxx
@@ -515,13 +515,22 @@ namespace build2
{
try
{
- // May throw invalid_argument or out_of_range.
- //
- size_t i;
- int64_t r (stoll (n.value, &i));
+ const string& v (n.value);
+
+ if (!wspace (v[0]))
+ {
+ // Note that unlike uint64, we don't support hex notation for int64.
+
+ // May throw invalid_argument or out_of_range.
+ //
+ size_t i;
+ int64_t r (stoll (v, &i));
+
+ if (i == v.size ())
+ return r;
- if (i == n.value.size ())
- return r;
+ // Fall through.
+ }
// Fall through.
}
@@ -563,13 +572,22 @@ namespace build2
{
try
{
- // May throw invalid_argument or out_of_range.
- //
- size_t i;
- uint64_t r (stoull (n.value, &i));
+ const string& v (n.value);
+
+ if (!wspace (v[0]))
+ {
+ int b (v[0] == '0' && (v[1] == 'x' || v[1] == 'X') ? 16 : 10);
+
+ // May throw invalid_argument or out_of_range.
+ //
+ size_t i;
+ uint64_t r (stoull (v, &i, b));
+
+ if (i == v.size ())
+ return r;
- if (i == n.value.size ())
- return r;
+ // Fall through.
+ }
// Fall through.
}