src/lib-mail/mail-types.h

#ifndef MAIL_TYPES_H
#define MAIL_TYPES_H

enum mail_flags {
    MAIL_ANSWERED   = 0x01,
    MAIL_FLAGGED    = 0x02,
    MAIL_DELETED    = 0x04,
    MAIL_SEEN   = 0x08,
    MAIL_DRAFT  = 0x10,
    MAIL_RECENT = 0x20,

    MAIL_FLAGS_MASK = 0x3f,
    MAIL_FLAGS_NONRECENT = (MAIL_FLAGS_MASK ^ MAIL_RECENT)
};

enum modify_type {
    MODIFY_ADD,
    MODIFY_REMOVE,
    MODIFY_REPLACE
};

ARRAY_DEFINE_TYPE(keywords, const char *);
ARRAY_DEFINE_TYPE(keyword_indexes, unsigned int);

#endif