first naive implementation of virtual table

Manifest.txt

@@ -13,6 +13,8 @@ ext/sqlite3/database.h
 ext/sqlite3/exception.c
 ext/sqlite3/exception.h
 ext/sqlite3/extconf.rb
+ext/sqlite3/vtable.c
+ext/sqlite3/vtable.h
 ext/sqlite3/sqlite3.c
 ext/sqlite3/sqlite3_ruby.h
 ext/sqlite3/statement.c
@@ -29,6 +31,7 @@ lib/sqlite3/statement.rb
 lib/sqlite3/translator.rb
 lib/sqlite3/value.rb
 lib/sqlite3/version.rb
+lib/sqlite3/vtable.rb
 setup.rb
 tasks/faq.rake
 tasks/gem.rake
@@ -38,7 +41,9 @@ test/helper.rb
 test/test_backup.rb
 test/test_collation.rb
 test/test_database.rb
+test/test_database_flags.rb
 test/test_database_readonly.rb
+test/test_database_readwrite.rb
 test/test_deprecated.rb
 test/test_encoding.rb
 test/test_integration.rb
@@ -50,3 +55,4 @@ test/test_result_set.rb
 test/test_sqlite3.rb
 test/test_statement.rb
 test/test_statement_execute.rb
+test/test_vtable.rb

ext/sqlite3/database.c

@@ -297,7 +297,7 @@ static VALUE last_insert_row_id(VALUE self)
   return LL2NUM(sqlite3_last_insert_rowid(ctx->db));
 }
 
-static VALUE sqlite3val2rb(sqlite3_value * val)
+VALUE sqlite3val2rb(sqlite3_value * val)
 {
   switch(sqlite3_value_type(val)) {
     case SQLITE_INTEGER:
@@ -334,7 +334,7 @@ static VALUE sqlite3val2rb(sqlite3_value * val)
   }
 }
 
-static void set_sqlite3_func_result(sqlite3_context * ctx, VALUE result)
+void set_sqlite3_func_result(sqlite3_context * ctx, VALUE result)
 {
   switch(TYPE(result)) {
     case T_NIL:

ext/sqlite3/database.h

@@ -3,6 +3,12 @@
 
 #include <sqlite3_ruby.h>
 
+#define DEBUG_LOG(...) (void)(0)
+//#define DEBUG_LOG(...) printf(__VA_ARGS__); fflush(stdout)
+// used by vtable.c too
+void set_sqlite3_func_result(sqlite3_context * ctx, VALUE result);
+VALUE sqlite3val2rb(sqlite3_value * val);
+
 struct _sqlite3Ruby {
   sqlite3 *db;
 };

ext/sqlite3/sqlite3.c

@@ -135,6 +135,7 @@ void Init_sqlite3_native()
 #ifdef HAVE_SQLITE3_BACKUP_INIT
   init_sqlite3_backup();
 #endif
+  init_sqlite3_vtable();
 
   rb_define_singleton_method(mSqlite3, "libversion", libversion, 0);
   rb_define_singleton_method(mSqlite3, "threadsafe", threadsafe_p, 0);

ext/sqlite3/sqlite3_ruby.h

@@ -46,6 +46,7 @@ extern VALUE cSqlite3Blob;
 #include <statement.h>
 #include <exception.h>
 #include <backup.h>
+#include <vtable.h>
 
 int bignum_to_int64(VALUE big, sqlite3_int64 *result);
 

ext/sqlite3/statement.c

@@ -118,7 +118,9 @@ static VALUE step(VALUE self)
 
   REQUIRE_OPEN_STMT(ctx);
 
-  if(ctx->done_p) return Qnil;
+  if(ctx->done_p) {
+	return Qnil;
+  }
 
 #ifdef HAVE_RUBY_ENCODING_H
   {
@@ -128,8 +130,8 @@ static VALUE step(VALUE self)
   }
 #endif
 
+
   stmt = ctx->st;
-
   value = sqlite3_step(stmt);
   length = sqlite3_column_count(stmt);
   list = rb_ary_new2((long)length);