[GR-18163] Update FFI specs and fix definitions of FFI::Pointer#put_array_of_* (#1525)

PullRequest: truffleruby/2246

Author: eregon

CHANGELOG.md

@@ -12,6 +12,7 @@ Bug fixes:
 * Fixed `String#unpack` for `w*` format (#2143).
 * Fixed issue with ``Kernel#` `` when invalid UTF-8 given (#2118).
 * Fixed issue with `Method#to_proc` and special variable storage (#2156).
+* Add missing `offset` parameter for `FFI::Pointer#put_array_of_*` (#1525).
 
 Compatibility:
 

lib/truffle/ffi/library.rb

@@ -115,7 +115,7 @@ def ffi_lib(*names)
             rescue Exception => ex
               ldscript = false
               if ex.message =~ /(([^ \t()])+\.so([^ \t:()])*):([ \t])*(invalid ELF header|file too short|invalid file format)/
-                if File.read($1) =~ /(?:GROUP|INPUT) *\( *([^ \)]+)/
+                if File.binread($1) =~ /(?:GROUP|INPUT) *\( *([^ \)]+)/
                   libname = $1
                   ldscript = true
                 end

lib/truffle/ffi/platform.rb

@@ -141,6 +141,12 @@ def self.is_os(os)
       "#{LIBPREFIX}c.#{LIBSUFFIX}"
     end
 
+    LITTLE_ENDIAN = 1234 unless defined?(LITTLE_ENDIAN)
+    BIG_ENDIAN = 4321 unless defined?(BIG_ENDIAN)
+    unless defined?(BYTE_ORDER)
+      BYTE_ORDER = [0x12345678].pack("I") == [0x12345678].pack("N") ? BIG_ENDIAN : LITTLE_ENDIAN
+    end
+
     # Test if current OS is a *BSD (include MAC)
     # @return [Boolean]
     def self.bsd?