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 <[email protected]>
(cherry picked from commit f03928b16c4fb00077d22d8ec141575ef6d26913)

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/rfc822parse.h b/tools/rfc822parse.h
index 177d8271a..e2f2bedac 100644
--- a/tools/rfc822parse.h
+++ b/tools/rfc822parse.h
@@ -48,6 +48,8 @@ typedef int (*rfc822parse_cb_t) (void *opaque,
                                  rfc822parse_event_t event,
                                  rfc822parse_t msg);
 
+int rfc822_valid_header_name_p (const char *name);
+void rfc822_capitalize_header_name (char *name);
 
 rfc822parse_t rfc822parse_open (rfc822parse_cb_t cb, void *opaque_value);