Relax syntax rules for parsing Content-Type headers.

* decodemail/decodemail.c (qstring_format): Account for s==NULL
(message_decode): Use MU_CONTENT_TYPE_RELAXED when parsing content types.
* doc/texinfo/programs/decodemail.texi: Document handling of partial
content types.
* include/mailutils/util.h (MU_CONTENT_TYPE_STRICT)
(MU_CONTENT_TYPE_RELAXED)
(MU_CONTENT_TYPE_PARAM): New constants.
(mu_content_type_parse_ext): New function.
* lib/mdecode.c (text_mime_cmp): Implement comparison of partial
content types (missing subtype).
(message_body_stream): Use MU_CONTENT_TYPE_RELAXED.
* libmailutils/base/ctparse.c (content_type_parse): Take additional
argument (flags). Modify parsing algorithm depending on its value.
(mu_content_type_parse_ext): New function.
(mu_content_type_parse): Rewrite as a wrapper over
mu_content_type_parse_ext.
(mu_content_type_destroy): Account for subtype==NULL.

1 files changed, 8 insertions, 1 deletions

diff --git a/include/mailutils/util.h b/include/mailutils/util.h
index 4ff036002..3261d3bb8 100644
--- a/include/mailutils/util.h
+++ b/include/mailutils/util.h
@@ -135,9 +135,16 @@ struct mu_content_type
 };
 
 typedef struct mu_content_type *mu_content_type_t;
-  
+ 
+#define MU_CONTENT_TYPE_STRICT   0x00 
+#define MU_CONTENT_TYPE_RELAXED  0x01
+#define MU_CONTENT_TYPE_PARAM    0x02
+
 int mu_content_type_parse (const char *input, const char *charset,
 			   mu_content_type_t *retct);
+int mu_content_type_parse_ext (const char *input, const char *charset,
+			       int flags,
+			       mu_content_type_t *retct);
 void mu_content_type_destroy (mu_content_type_t *pptr);
 
 int mu_content_type_format (mu_content_type_t ct, char **return_ptr);