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Annotation of 43BSDReno/contrib/isode-beta/psap/qbuf2ps.c, revision 1.1

1.1     ! root        1: /* qbuf2ps.c - qbuf-backed abstractions for PStreams */
        !             2: 
        !             3: #ifndef        lint
        !             4: static char *rcsid = "$Header: /f/osi/psap/RCS/qbuf2ps.c,v 7.0 89/11/23 22:13:33 mrose Rel $";
        !             5: #endif
        !             6: 
        !             7: /* 
        !             8:  * $Header: /f/osi/psap/RCS/qbuf2ps.c,v 7.0 89/11/23 22:13:33 mrose Rel $
        !             9:  *
        !            10:  *
        !            11:  * $Log:       qbuf2ps.c,v $
        !            12:  * Revision 7.0  89/11/23  22:13:33  mrose
        !            13:  * Release 6.0
        !            14:  * 
        !            15:  */
        !            16: 
        !            17: /*
        !            18:  *                               NOTICE
        !            19:  *
        !            20:  *    Acquisition, use, and distribution of this module and related
        !            21:  *    materials are subject to the restrictions of a license agreement.
        !            22:  *    Consult the Preface in the User's Manual for the full terms of
        !            23:  *    this agreement.
        !            24:  *
        !            25:  */
        !            26: 
        !            27: 
        !            28: /* LINTLIBRARY */
        !            29: 
        !            30: #include <stdio.h>
        !            31: #include "psap.h"
        !            32: 
        !            33: /*  */
        !            34: 
        !            35: /* ARGSUSED */
        !            36: 
        !            37: static int  qbuf_read (ps, data, n, in_line)
        !            38: register PS    ps;
        !            39: PElementData data;
        !            40: PElementLen n;
        !            41: int    in_line;
        !            42: {
        !            43:     register int cc,
        !            44:                 i;
        !            45:     register struct qbuf *qb,
        !            46:                         *qp;
        !            47: 
        !            48:     if ((qb = (struct qbuf *) ps -> ps_addr) == NULL)
        !            49:        return 0;
        !            50: 
        !            51:     for (qp = NULL, cc = 0; n > 0; data += i, cc += i, n -= i) {
        !            52:        if (qp == NULL && (qp = qb -> qb_forw) == qb)
        !            53:            return cc;
        !            54: 
        !            55:        i = min (qp -> qb_len, n);
        !            56:        bcopy (qp -> qb_data, (char *) data, i);
        !            57: 
        !            58:        qp -> qb_data += i, qp -> qb_len -= i;
        !            59:        if (qp -> qb_len <= 0) {
        !            60:            remque (qp);
        !            61: 
        !            62:            free ((char *) qp);
        !            63:            qp = NULL;
        !            64:        }
        !            65:     }
        !            66: 
        !            67:     return cc;
        !            68: }
        !            69: 
        !            70: 
        !            71: static int  qbuf_close (ps)
        !            72: register PS    ps;
        !            73: {
        !            74:     register struct qbuf   *qb;
        !            75: 
        !            76:     if ((qb = (struct qbuf *) ps -> ps_addr) == NULL)
        !            77:        return;
        !            78: 
        !            79:     QBFREE (qb);
        !            80: }
        !            81: 
        !            82: /*  */
        !            83: 
        !            84: int    qbuf_open (ps)
        !            85: register PS    ps;
        !            86: {
        !            87:     ps -> ps_readP = qbuf_read;
        !            88:     ps -> ps_closeP = qbuf_close;
        !            89: 
        !            90:     return OK;
        !            91: }

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