BSD 4_3 development

[unix-history] / usr / contrib / rn / head.h

/* $Header: head.h,v 4.3 85/05/01 11:38:31 lwall Exp $
*
* $Log:        head.h,v $
* Revision 4.3  85/05/01  11:38:31  lwall
* Baseline for release with 4.3bsd.
* 
*/

#define HEAD_FIRST 1

/* types of header lines (if only C really believed in enums)
* (These must stay in alphabetic order at least in the first letter.
* Within each letter it helps to arrange in increasing likelihood.)
*/

#define PAST_HEADER     0       /* body */
#define SOME_LINE       1       /* unrecognized */
#define ARTID_LINE      2       /* article-i.d. */
#define APPR_LINE       3       /* approved */
#define DIST_LINE       4       /* distribution */
#define DATE_LINE       5       /* date */
#define RECEIVED_LINE   6       /* date-received */
#define EXPIR_LINE      7       /* expires */
#define FOLLOW_LINE     8       /* followup-to */
#define FROM_LINE       9       /* from */
#define KEYW_LINE       10      /* keywords */
#define LINES_LINE      11      /* lines */
#define MESSID_LINE     12      /* message-id */
#define NFFR_LINE       13      /* nf-from */
#define NFID_LINE       14      /* nf-id */
#define NGS_LINE        15      /* newsgroups */
#define ORG_LINE        16      /* organization */
#define PATH_LINE       17      /* path */
#define POSTED_LINE     18      /* posted */
#define PVER_LINE       19      /* posting-version */
#define REPLY_LINE      20      /* reply-to */
#define REFS_LINE       21      /* references */
#define RVER_LINE       22      /* relay-version */
#define SENDER_LINE     23      /* sender */
#define SUMRY_LINE      24      /* summary */
#define SUBJ_LINE       25      /* subject */
#define XREF_LINE       26      /* xref */

#define HEAD_LAST       27      /* one more than the last one above */

struct headtype {
   char *ht_name;              /* header line identifier */
#ifdef pdp11
   short ht_minpos;
   short ht_maxpos;
#else
   ART_POS ht_minpos;          /* pointer to beginning of line in article */
   ART_POS ht_maxpos;          /* pointer to end of line in article */
#endif
   char ht_length;             /* could make these into nybbles but */
   char ht_flags;              /* it wouldn't save space normally */
};                              /* due to alignment considerations */

#define HT_HIDE 1       /* -h on this line */
#define HT_MAGIC 2      /* do any special processing on this line */

/* This array must stay in the same order as the list above */

#ifndef DOINIT
EXT struct headtype htype[HEAD_LAST];
#else
struct headtype htype[HEAD_LAST] = {
/* name             minpos   maxpos  length   flag */
   {"BODY",            0,      0,      4,      0               },
   {"unrecognized",    0,      0,      12,     0               },
   {"article-i.d.",    0,      0,      12,     HT_HIDE         },
   {"approved",        0,      0,      8,      HT_HIDE         },
   {"distribution",    0,      0,      12,     0               },
   {"date",            0,      0,      4,      0               },
   {"date-received",   0,      0,      13,     0               },
   {"expires",         0,      0,      7,      HT_HIDE|HT_MAGIC},
   {"followup-to",     0,      0,      11,     0               },
   {"from",            0,      0,      4,      0               },
   {"keywords",        0,      0,      8,      0               },
   {"lines",           0,      0,      5,      0               },
   {"message-id",      0,      0,      10,     0               },
   {"nf-from",         0,      0,      7,      HT_HIDE         },
   {"nf-id",           0,      0,      5,      HT_HIDE         },
   {"newsgroups",      0,      0,      10,     HT_MAGIC|HT_HIDE},
   {"organization",    0,      0,      12,     0               },
   {"path",            0,      0,      4,      HT_HIDE         },
   {"posted",          0,      0,      6,      HT_HIDE         },
   {"posting-version", 0,      0,      15,     HT_HIDE         },
   {"reply-to",        0,      0,      8,      0               },
   {"references",      0,      0,      10,     0               },
   {"relay-version",   0,      0,      13,     HT_HIDE         },
   {"sender",          0,      0,      6,      0               },
   {"summary",         0,      0,      7,      0               },
   {"subject",         0,      0,      7,      HT_MAGIC        },
   {"xref",            0,      0,      4,      HT_HIDE         }
};
#endif

#ifdef ASYNC_PARSE
EXT ART_NUM parsed_art INIT(0);
#endif

EXT char in_header INIT(0);             /* are we decoding the header? */

#ifdef CACHESUBJ
   EXT char **subj_list INIT(Null(char **));
#endif

void    head_init();
int     set_line_type();
void    start_header();
bool    parseline();
#ifdef ASYNC_PARSE
   int         parse_maybe();
#endif
char    *fetchsubj();
char    *fetchlines();