* c-lex.c (lex_charconst): Convert into a simple wrapper
	around cpp_interpret_charconst, to which most of the code
	body is moved.
	* cppexp.c (MAX_CHAR_TYPE_SIZE, MAX_WCHAR_TYPE_SIZE,
	MAX_LONG_TYPE_SIZE, MAX_INT_TYPE_SIZE, MAX_CHAR_TYPE_MASK,
	MAX_WCHAR_TYPE_MASK, parse_escape, parse_charconst): Remove.
	(lex): Use cpp_interpret_charconst.
	* cpplex.c (parse_escape, read_ucs, cpp_interpret_charconst,
	hex_digit_value): New functions.
	(MAX_CHAR_TYPE_SIZE, MAX_WCHAR_TYPE_SIZE): New macros.
	* cpplib.h (cpp_interpret_charconst): New prototype.
	* Makefile.in: Update.

From-SVN: r41978