typedef enum _KEYIDX {
    ID_Newsgroups   ,
    ID_X_Newsgroups ,
    ID_Path         ,
    ID_From         ,
    ID_Subject      ,
    ID_References   ,
    ID_Followup_To  ,
    ID_Approved     ,
    ID_Organization ,
    ID_Date         ,
    ID_Message_ID   ,
    ID_Keywords     ,
    ID_Summary      ,
    ID_Expires      ,
    ID_Reply_To     ,
    ID_Distribution ,
    ID_Control      ,
    ID_Sender       ,
    ID_Lines        ,
    ID_Xref         ,
    ID_LASTENTRY
} KEYIDX;

typedef struct {
    char   *name;
    KEYIDX idx;
} KEYWORD;

typedef struct {
    char *key;
    char *info;
} HEADER;

extern HEADER header[ID_LASTENTRY];


#define MAX_XHEADER 100

extern char *xheader[MAX_XHEADER];
extern int  nxheader;

extern long read_header(FILE *fp, char *buf, int *bufsiz);
extern long write_header(FILE *fp);
extern int write_xref(FILE *fp, char *node, char **ngarray);

extern char *rfc_date(char *buf, int bufsiz);