split internal.h into files

One day, I could not resist the way it was written.  I finally started
to make the code clean.  This changeset is the beginning of a series of
housekeeping commits.  It is a simple refactoring; split internal.h into
files, so that we can divide and concur in the upcoming commits.  No
lines of codes are either added or removed, except the obvious file
headers/footers.  The generated binary is identical to the one before.

1 files changed, 29 insertions, 0 deletions

diff --git a/internal/symbol.h b/internal/symbol.h
new file mode 100644
index 0000000000..8423cb4dc8
--- /dev/null
+++ b/internal/symbol.h
@@ -0,0 +1,29 @@
+#ifndef INTERNAL_SYMBOL_H /* -*- C -*- */
+#define INTERNAL_SYMBOL_H
+/**
+ * @file
+ * @brief      Internal header for Symbol.
+ * @author     \@shyouhei
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ */
+
+/* symbol.c */
+#ifdef RUBY_ENCODING_H
+VALUE rb_sym_intern(const char *ptr, long len, rb_encoding *enc);
+#endif
+VALUE rb_sym_intern_ascii(const char *ptr, long len);
+VALUE rb_sym_intern_ascii_cstr(const char *ptr);
+#ifdef __GNUC__
+#define rb_sym_intern_ascii_cstr(ptr) __extension__ ( \
+{                                               \
+    (__builtin_constant_p(ptr)) ?               \
+        rb_sym_intern_ascii((ptr), (long)strlen(ptr)) : \
+        rb_sym_intern_ascii_cstr(ptr); \
+})
+#endif
+VALUE rb_to_symbol_type(VALUE obj);
+
+#endif /* INTERNAL_SYMBOL_H */