[Zucchini] Introduce bit operations into algorithm.h.

This CL makes algorithm.h in Chromium match trunk's version. Details:
- Add {GetBit(), GetSignedBits(), GetUnsignedBits(), SignedFit()}.
  These will be used by the ARM Disassembler.
- Rename ceil() to AlignCeil() to avoid confusion with ceil() from
  <cmath>.
- Extensive unit tests.
- Minor enum type fix in disassembler_win32.h (offset_t should not
  be used to represent lengths).

Change-Id: Icf9ce254bce2e5a3e9c286dbb5a704aeacd8bc35
Reviewed-on: https://chromium-review.googlesource.com/1098556
Reviewed-by: Samuel Huang <huangs@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Commit-Queue: Samuel Huang <huangs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566893}
NOKEYCHECK=True
GitOrigin-RevId: 2c50b5af45fa271f06317419f6b8bfc5f4a80be0

1 files changed, 2 insertions, 2 deletions

diff --git a/disassembler_win32.h b/disassembler_win32.h
index 8e410ee..29033ce 100644
--- a/disassembler_win32.h
+++ b/disassembler_win32.h
@@ -30,7 +30,7 @@ struct Win32X86Traits {
   static constexpr ExecutableType kExeType = kExeTypeWin32X86;
   enum : uint16_t { kMagic = 0x10B };
   enum : uint16_t { kRelocType = 3 };
-  enum : offset_t { kVAWidth = 4 };
+  enum : uint32_t { kVAWidth = 4 };
   static const char kExeTypeString[];
 
   using ImageOptionalHeader = pe::ImageOptionalHeader;
@@ -43,7 +43,7 @@ struct Win32X64Traits {
   static constexpr ExecutableType kExeType = kExeTypeWin32X64;
   enum : uint16_t { kMagic = 0x20B };
   enum : uint16_t { kRelocType = 10 };
-  enum : offset_t { kVAWidth = 8 };
+  enum : uint32_t { kVAWidth = 8 };
   static const char kExeTypeString[];
 
   using ImageOptionalHeader = pe::ImageOptionalHeader64;