Add _uint module to std, move some code around.

1 files changed, 68 insertions, 0 deletions

diff --git a/src/lib/_uint.rs b/src/lib/_uint.rs
new file mode 100644
index 00000000..8a03d00b
--- /dev/null
+++ b/src/lib/_uint.rs
@@ -0,0 +1,68 @@
+import std.sys;
+
+fn add(uint x, uint y) -> uint { ret x + y; }
+fn sub(uint x, uint y) -> uint { ret x - y; }
+fn mul(uint x, uint y) -> uint { ret x * y; }
+fn div(uint x, uint y) -> uint { ret x / y; }
+fn rem(uint x, uint y) -> uint { ret x % y; }
+
+fn lt(uint x, uint y) -> bool { ret x < y; }
+fn le(uint x, uint y) -> bool { ret x <= y; }
+fn eq(uint x, uint y) -> bool { ret x == y; }
+fn ne(uint x, uint y) -> bool { ret x != y; }
+fn ge(uint x, uint y) -> bool { ret x >= y; }
+fn gt(uint x, uint y) -> bool { ret x > y; }
+
+iter range(mutable uint lo, uint hi) -> uint {
+  while (lo < hi) {
+    put lo;
+    lo += 1u;
+  }
+}
+
+fn next_power_of_two(uint n) -> uint {
+  // FIXME change |* uint(4)| below to |* uint(8) / uint(2)| and watch the
+  // world explode.
+  let uint halfbits = sys.rustrt.size_of[uint]() * 4u;
+  let uint tmp = n - 1u;
+  let uint shift = 1u;
+  while (shift <= halfbits) {
+    tmp |= tmp >> shift;
+    shift <<= 1u;
+  }
+  ret tmp + 1u;
+}
+
+fn to_str(mutable uint n, uint radix) -> str
+{
+  check (0u < radix && radix <= 16u);
+  fn digit(uint n) -> str {
+    alt (n) {
+      case (0u) { ret "0"; }
+      case (1u) { ret "1"; }
+      case (2u) { ret "2"; }
+      case (3u) { ret "3"; }
+      case (4u) { ret "4"; }
+      case (5u) { ret "5"; }
+      case (6u) { ret "6"; }
+      case (7u) { ret "7"; }
+      case (8u) { ret "8"; }
+      case (9u) { ret "9"; }
+      case (10u) { ret "a"; }
+      case (11u) { ret "b"; }
+      case (12u) { ret "c"; }
+      case (13u) { ret "d"; }
+      case (14u) { ret "e"; }
+      case (15u) { ret "f"; }
+    }
+  }
+
+  if (n == 0u) { ret "0"; }
+
+  let str s = "";
+  while (n > 0u) {
+    s = digit(n % radix) + s;
+    n /= radix;
+  }
+  ret s;
+}