Create Oneshot::crc32 Ruby function

Due to issues in loading Zlib directly within Ruby, I decided to create a C++ binding.  Boost also has a much faster and smarter CRC32 implementation, so I decided to just use it instead of working with Zlib.

This also means that translations are fixed!

binding-mri/oneshot-binding.cpp

@@ -6,6 +6,7 @@
 #include "eventthread.h"
 
 #include <SDL.h>
+#include <boost/crc.hpp>
 
 RB_METHOD(oneshotSetYesNo)
 {
@@ -88,6 +89,17 @@ RB_METHOD(oneshotShake)
 	return Qnil;
 }
 
+RB_METHOD(oneshotCRC32)
+{
+    RB_UNUSED_PARAM;
+    VALUE string;
+    boost::crc_32_type result;
+    rb_get_args(argc, argv, "S", &string RB_ARG_END);
+    std::string str = std::string(RSTRING_PTR(string), RSTRING_LEN(string));
+    result.process_bytes(str.data(), str.length());
+    return UINT2NUM(result.checksum());
+}
+
 void oneshotBindingInit()
 {
     VALUE module = rb_define_module("Oneshot");
@@ -114,4 +126,5 @@ void oneshotBindingInit()
     _rb_define_module_function(module, "allow_exit", oneshotAllowExit);
 	_rb_define_module_function(module, "exiting", oneshotExiting);
     _rb_define_module_function(module, "shake", oneshotShake);
+	_rb_define_module_function(module, "crc32", oneshotCRC32);
 }

scripts/i18n_Language.rb

@@ -52,7 +52,7 @@ class Language
     def tr(string)
       #dbg_print(caller_locations(1, 1).first.tap{|loc| puts "#{loc.path}:#{loc.lineno}"})
       if @data
-        rv = @data[Zlib::crc32(string)] || string
+        rv = @data[Oneshot::crc32(string)] || string
       else
         rv = string
       end