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Annotation of 43BSDReno/contrib/isode-beta/psap/qbuf2ps.c, revision 1.1.1.1

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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