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Diffstat (limited to 'src/isode/psap/ps_alloc.c')
| -rw-r--r-- | src/isode/psap/ps_alloc.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/src/isode/psap/ps_alloc.c b/src/isode/psap/ps_alloc.c deleted file mode 100644 index 4f77da7f53..0000000000 --- a/src/isode/psap/ps_alloc.c +++ /dev/null @@ -1,73 +0,0 @@ -/* ps_alloc.c - allocate a presentation stream */ - -/* - * isode/psap/ps_alloc.c - */ - -/* - * NOTICE - * - * Acquisition, use, and distribution of this module and related - * materials are subject to the restrictions of a license agreement. - * Consult the Preface in the User's Manual for the full terms of - * this agreement. - * - */ - - -/* LINTLIBRARY */ - -#include <stdio.h> -#include "psap.h" - - -/* A Presentatation Stream (or PStream) is the second generation of - "generic" I/O stream-based handling. (For the first attempt, - take a look at the prototype implementation of the TTI Trusted Mail - Agent.) The idea is to present a common, simple I/O paradigm (i.e., - the UNIX v7 philosophy) to protocol-translation entities regardless of - the underlying medium (files, pipes, sockets, or strings). - - New streams are created by a call to ps_alloc(). It allocates memory - and calls an open routine. This routine fills in the dispatch vectors - for read/write and (optionally) close. It can also fill in any other - part of the stream's structure it likes. - - Once created, I/O is done using the macros ps_read/ps_write. These - return either NOTOK or OK; depending on how things went. The read/write - routines are invoked as: - - int iofunc (ps, data, n, in_line) - PS ps; - PElementData data; - PElementLen n; - int in_line; - - They should read/write upto len bytes, starting at data, and return the - number of bytes processed, or NOTOK on error. The routine ps_io() will - make successive calls to fill/flush the data. If the read/write routine - returns NOTOK, it should set ps_errno as well. - - Streams are removed by a call to ps_free (). It calls the close - routine, if any, which should de-commission any parts of the stream's - structure that are in use. ps_free() will then free the allocated - memory. - */ - -/* */ - -PS ps_alloc (io) -register IFP io; -{ - register PS ps; - - if ((ps = (PS) calloc (1, sizeof *ps)) == NULLPS) - return NULLPS; - - if ((*io) (ps) == NOTOK) { - ps_free (ps); - return NULLPS; - } - - return ps; -} |
