tools: Replace duplicated code in mime-maker.
* tools/rfc822parse.c (HEADER_NAME_CHARS): New. Taken from mime-maker.c. (rfc822_valid_header_name_p): New. Based on code from mime-maker.c. (rfc822_capitalize_header_name): New. Copied from mime-maker.c. (capitalize_header_name): Remove. Replace calls by new func. (my_toupper, my_strcasecmp): New. * tools/mime-maker.c: Include rfc822parse.h. (HEADER_NAME_CHARS, capitalize_header_name): Remove. (add_header): Replace check and capitalization by new functions.
This is a straightforward change with two minor chnages:
- In rfc822parse.c the capitalization handles MIME-Version special.
- The check in mime-maker bow detects a zero-length name as invalid.
my_toupper and my_strcasecmp are introduced to allow standalone use
of that file.
- Signed-off-by: Werner Koch <wk@gnupg.org>