#!/usr/bin/sed -rnf
1apackage foo
1aconst (
/^#define\s+SD_MESSAGE_/ {

	s/^#define\s+SD_MESSAGE_(\S*)/\1 =/

	s/SD_ID128_MAKE\(/ID128{0x/
	s/,/,0x/g
	s/\)/}/

	s/(^|_)([A-Z])([A-Z]*)/\U\2\L\3/g

	p
}
/^$/p
$a)