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Annotation of 43BSD/contrib/news/misc/bncvt-2-unbatch, revision 1.1

1.1     ! root        1: From [email protected] (Carl S. Gutekunst) Wed Oct 30 22:12:27 1985
        !             2: Relay-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site seismo.UUCP
        !             3: Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site pyramid.UUCP
        !             4: Path: seismo!lll-crg!dual!pyramid!csg
        !             5: From: [email protected] (Carl S. Gutekunst)
        !             6: Newsgroups: net.sources
        !             7: Subject: bncvt -- filter bnproc batches to unbatch
        !             8: Message-ID: <[email protected]>
        !             9: Date: 31 Oct 85 03:12:27 GMT
        !            10: Date-Received: 31 Oct 85 12:52:30 GMT
        !            11: Reply-To: [email protected] (Carl S. Gutekunst)
        !            12: Followup-To: net.sources.bugs
        !            13: Organization: Pyramid Technology, Mountain View, CA
        !            14: Lines: 104
        !            15: Keywords: news bnproc unbatch bncvt
        !            16: 
        !            17: /*===========================================================================**
        !            18: **              BBBBBBB   NN    NN    CCCCC   VV    VV  TTTTTTTT             **
        !            19: **              BB    BB  NNN   NN   CC   CC  VV    VV     TT                **
        !            20: **              BB    BB  NNNN  NN  CC        VV    VV     TT                **
        !            21: **              BBBBBBB   NN NN NN  CC        VV    VV     TT                **
        !            22: **              BB    BB  NN  NNNN  CC         VV  VV      TT                **
        !            23: **              BB    BB  NN   NNN   CC   CC    VVVV       TT                **
        !            24: **              BBBBBBB   NN    NN    CCCCC      VV        TT                **
        !            25: **===========================================================================**
        !            26: **  Copyright (C) 1985 by PYRAMID TECHNOLOGY CORPORATION, Mountain View, CA  **
        !            27: **===========================================================================**
        !            28: ** Permission is granted to freely use and distribute this software, as long **
        !            29: ** as no attempt is made to profit from it, and this notice is included.     **
        !            30: **===========================================================================**
        !            31: **
        !            32: ** ** bncvt.c -- utility to filter bnproc news batches to unbatch.
        !            33: **
        !            34: **    Written in a fit of desperation by Carl S. Gutekunst
        !            35: **
        !            36: ** ** Decsription:
        !            37: **
        !            38: **     This filter accepts uncompressed news batches in "bnproc" format and
        !            39: **     writes them out in "unbatch" format. Using 2.10.3 news, its output can
        !            40: **     be piped directly into rnews.
        !            41: **
        !            42: **     The filter also adjusts for the bnproc "article eater" bug, which threw
        !            43: **     off the article byte count and caused rnews to discard entire articles.
        !            44: **
        !            45: ** ** Execution (for 2.10.3 netnews):
        !            46: **
        !            47: **     uncompress | bncvt | rnews
        !            48: **
        !            49: ** ** Generation:
        !            50: **
        !            51: **     cc bncvt.c -o bncvt -s -O
        !            52: **
        !            53: ** ** $Log:    bncvt.c,v $
        !            54: **     Revision 1.1  85/10/30  19:07:13  csg
        !            55: **     Initial version, written in a fit of desperation by Carl S. Gutekunst.
        !            56: **     
        !            57: **===========================================================================*/
        !            58: 
        !            59: #include <stdio.h>
        !            60: 
        !            61: #define LINESIZE 128                   /* Size of the input line buffer     */
        !            62: 
        !            63: static char RCSid[] = "$Header: bncvt.c,v 1.1 85/10/30 19:07:13 csg Rel $";
        !            64: 
        !            65: main ()
        !            66: {
        !            67:    char linebuf[LINESIZE], *lp;                /* Single line buffer, and pointer   */
        !            68:    int expected, nbytes;               /* Bytes expected and read so far    */
        !            69: 
        !            70:    nbytes = expected = 0;
        !            71:    while (fgets (linebuf, LINESIZE, stdin) != NULL)
        !            72:    {
        !            73:       /*
        !            74:        * Check for an article eater. This is a DEL character, either 0x7F or
        !            75:        * 0xFF, in the first column preceeding a new article byte count. It
        !            76:        * usually throws off the byte count, so we have to add some padding
        !            77:        * to keep rnews from losing sync (and discarding the next article).
        !            78:        */
        !            79: 
        !            80:       if ((linebuf[0] & 0x7F) == 0x7F)
        !            81:       {
        !            82:         if (expected > 0)
        !            83:            while (nbytes++ < expected)
        !            84:               putc ('\0', stdout);
        !            85:       }
        !            86: 
        !            87:       /*
        !            88:        * If we aren't expecting text, then we're expecting an article byte
        !            89:        * count. This is a left-justified integer, immediately followed by a
        !            90:        * newline. We ignore leading article-eater DEL characters.
        !            91:        */
        !            92: 
        !            93:       if (nbytes >= expected)
        !            94:       {
        !            95:         nbytes = expected = 0;
        !            96:         lp = linebuf;
        !            97:         while ((*lp & 0x7F) == 0x7F)
        !            98:            ++lp;
        !            99:         while (*lp >= '0' && *lp <= '9')
        !           100:            expected = expected * 10 + (*lp++ - '0');
        !           101: 
        !           102:         if (*lp == '\n' && expected > 0)
        !           103:            printf ("#! rnews %d\n", expected);
        !           104:         else
        !           105:         {  fprintf (stderr, "Sync->%s", linebuf);
        !           106:            expected = 0;
        !           107:         }
        !           108:       }
        !           109: 
        !           110:       /*
        !           111:        * Another normal line of text: write it out.
        !           112:        */
        !           113: 
        !           114:       else
        !           115:       {
        !           116:         fputs (linebuf, stdout);
        !           117:         nbytes += strlen (linebuf);
        !           118:       }
        !           119:    }
        !           120: }
        !           121: 
        !           122: 

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