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/* $Id: head.h,v 3.0 1992/02/01 03:09:32 davison Trn $
*/
/* This software is Copyright 1991 by Stan Barber.
*
* Permission is hereby granted to copy, reproduce, redistribute or otherwise
* use this software as long as: there is no monetary profit gained
* specifically from the use or reproduction of this software, it is not
* sold, rented, traded or otherwise marketed, and this copyright notice is
* included prominently in any copy made.
*
* The authors make no claims as to the fitness or correctness of this software
* for any use whatsoever, and it is provided as is. Any use of this software
* is at the user's own risk.
*/
#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 (PAST_HEADER+1) /* unrecognized */
#define ARTID_LINE (SOME_LINE+1) /* article-i.d. */
#define APPR_LINE (ARTID_LINE+1) /* approved */
#define ACAT_LINE (APPR_LINE+1) /* ACategory (ClariNet) */
#define ANPA_LINE (ACAT_LINE+1) /* ANPA (ClariNet) */
#define CODES_LINE (ANPA_LINE+1) /* Codes (ClariNet) */
#define CONTENT_LINE (CODES_LINE+1) /* Content-Type (MIME) */
#define CONTXFER_LINE (CONTENT_LINE+1) /* Content-Transfer-Encoding */
#define CANCEL_LINE (CONTXFER_LINE+1) /* cancel */
#define DIST_LINE (CANCEL_LINE+1) /* distribution */
#define DATE_LINE (DIST_LINE+1) /* date */
#define RECEIVED_LINE (DATE_LINE+1) /* date-received */
#define EXPIR_LINE (RECEIVED_LINE+1) /* expires */
#define FOLLOW_LINE (EXPIR_LINE+1) /* followup-to */
#define FROM_LINE (FOLLOW_LINE+1) /* from */
#define FORM_LINE (FROM_LINE+1) /* Format (ClariNet) */
#define KEYW_LINE (FORM_LINE+1) /* keywords */
#define LINES_LINE (KEYW_LINE+1) /* lines */
#define MESSID_LINE (LINES_LINE+1) /* message-id */
#define NFFR_LINE (MESSID_LINE+1) /* nf-from */
#define NFID_LINE (NFFR_LINE+1) /* nf-id */
#define NGS_LINE (NFID_LINE+1) /* newsgroups */
#define NNTPHOST_LINE (NGS_LINE+1) /* nntp-posting-host */
#define NOTE_LINE (NNTPHOST_LINE+1) /* Note (ClariNet) */
#define ORG_LINE (NOTE_LINE+1) /* organization */
#define PATH_LINE (ORG_LINE+1) /* path */
#define POSTED_LINE (PATH_LINE+1) /* posted */
#define PVER_LINE (POSTED_LINE+1) /* posting-version */
#define PRI_LINE (PVER_LINE+1) /* Priority (ClariNet) */
#define REPLY_LINE (PRI_LINE+1) /* reply-to */
#define REFS_LINE (REPLY_LINE+1) /* references */
#define RVER_LINE (REFS_LINE+1) /* relay-version */
#define SENDER_LINE (RVER_LINE+1) /* sender */
#define SUMRY_LINE (SENDER_LINE+1) /* summary */
#define SUBJ_LINE (SUMRY_LINE+1) /* subject */
#define SUPR_LINE (SUBJ_LINE+1) /* supersedes */
#define SLUG_LINE (SUPR_LINE+1) /* Slugword (ClariNet) */
#define XREF_LINE (SLUG_LINE+1) /* xref */
#define XSUP_LINE (XREF_LINE+1) /* X-Supersedes (ClariNet) */
#define HEAD_LAST (XSUP_LINE+1) /* total # of headers */
struct headtype {
char *ht_name; /* header line identifier */
ART_POS ht_minpos; /* pointer to beginning of line in article */
ART_POS ht_maxpos; /* pointer to end of line in article */
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 */
#define HT_CACHED 4 /* this information is cached in the article data */
/* 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 },
{"acategory", 0, 0, 9, HT_HIDE },
{"anpa", 0, 0, 4, HT_HIDE },
{"codes", 0, 0, 5, HT_HIDE },
#if defined(MIMESHOW) || defined(MIMESTORE)
{"content-type", 0, 0, 12, HT_MAGIC },
{"content-transfer-encoding",
0, 0, 25, HT_MAGIC },
#else
{"content-type", 0, 0, 12, 0 },
{"content-transfer-encoding",
0, 0, 25, 0 },
#endif
{"control", 0, 0, 7, 0 },
{"distribution", 0, 0, 12, 0 },
{"date", 0, 0, 4, HT_MAGIC },
{"date-received", 0, 0, 13, 0 },
{"expires", 0, 0, 7, HT_HIDE|HT_MAGIC},
{"followup-to", 0, 0, 11, 0 },
{"from", 0, 0, 4, HT_CACHED },
{"format", 0, 0, 6, HT_HIDE },
{"keywords", 0, 0, 8, 0 },
{"lines", 0, 0, 5, 0 },
{"message-id", 0, 0, 10, HT_HIDE|HT_CACHED},
{"nf-from", 0, 0, 7, HT_HIDE },
{"nf-id", 0, 0, 5, HT_HIDE },
#ifdef DBM_XREFS
{"newsgroups", 0, 0, 10, HT_MAGIC|HT_HIDE|HT_CACHED},
#else
{"newsgroups", 0, 0, 10, HT_MAGIC|HT_HIDE},
#endif
{"nntp-posting-host",0, 0, 17, HT_HIDE },
{"note", 0, 0, 4, 0, },
{"organization", 0, 0, 12, 0 },
{"path", 0, 0, 4, HT_HIDE },
{"posted", 0, 0, 6, HT_HIDE },
{"posting-version", 0, 0, 15, HT_HIDE },
{"priority", 0, 0, 8, HT_HIDE },
{"reply-to", 0, 0, 8, HT_HIDE },
{"references", 0, 0, 10, HT_HIDE },
{"relay-version", 0, 0, 13, HT_HIDE },
{"sender", 0, 0, 6, HT_HIDE },
{"summary", 0, 0, 7, 0 },
{"subject", 0, 0, 7, HT_MAGIC|HT_CACHED},
{"supersedes", 0, 0, 10, 0 },
{"slugword", 0, 0, 8, HT_HIDE },
#ifdef DBM_XREFS
{"xref", 0, 0, 4, HT_HIDE},
#else
{"xref", 0, 0, 4, HT_HIDE|HT_CACHED},
#endif
{"x-supersedes", 0, 0, 12, HT_HIDE }
};
#endif
EXT ART_NUM parsed_art INIT(0); /* the article number we've parsed */
EXT char in_header INIT(0); /* are we decoding the header? */
EXT char *headbuf;
EXT long headbuf_size;
void head_init _((void));
int set_line_type _((char*,char*));
void start_header _((ART_NUM));
void end_header_line _((void));
void end_header _((void));
bool parseline _((char*,int,int));
bool parseheader _((ART_NUM));
char *fetchlines _((ART_NUM,int)); /* returns a malloc'ed string */
char *prefetchlines _((ART_NUM,int,bool_int));
#ifdef DEBUG
void dumpheader _((char*));
#endif
#ifdef USE_NNTP
#define PREFETCH_SIZE 5
#endif
#define fetchsubj(artnum,copy) prefetchlines(artnum,SUBJ_LINE,copy)
#define fetchfrom(artnum,copy) prefetchlines(artnum,FROM_LINE,copy)
#ifdef DBM_XREFS
#define fetchxref(artnum,copy) prefetchlines(artnum,NGS_LINE,copy)
#else
#define fetchxref(artnum,copy) prefetchlines(artnum,XREF_LINE,copy)
#endif
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