* platform/example is now a "stub" platform - it should compile anywhere, but

[pdclib.old] / platform / example / functions / _PDCLIB / flushbuffer.c

diff --git a/platform/example/functions/_PDCLIB/flushbuffer.c b/platform/example/functions/_PDCLIB/flushbuffer.c
index e68c6c49041875243d7e983211b682e0e4bbd28c..6dc11640017e78bf9cc1aa46eff206cc60f8d97f 100644 (file)
--- a/platform/example/functions/_PDCLIB/flushbuffer.c
+++ b/platform/example/functions/_PDCLIB/flushbuffer.c
@@ -6,8 +6,7 @@
    Permission is granted to use, modify, and / or redistribute at will.
 */
 
-/* This is an example implementation of _PDCLIB_flushbuffer() fit for
-   use with POSIX kernels.
+/* This is a stub implementation of _PDCLIB_flushbuffer
 */
 
 #include <stdio.h>
@@ -15,83 +14,11 @@
 
 #ifndef REGTEST
 #include <_PDCLIB_glue.h>
-
-#include </usr/include/errno.h>
-
-typedef long ssize_t;
-extern ssize_t write( int fd, const void * buf, size_t count );
-
-/* The number of attempts to complete an output buffer flushing before giving
- *    up.
- *    */
-#define _PDCLIB_IO_RETRIES 1
-
-/* What the system should do after an I/O operation did not succeed, before   */
-/* trying again. (Empty by default.)                                          */
-#define _PDCLIB_IO_RETRY_OP( stream )
+#include <errno.h>
 
 int _PDCLIB_flushbuffer( struct _PDCLIB_file_t * stream )
 {
-    if ( ! ( stream->status & _PDCLIB_FBIN ) )
-    {
-        /* TODO: Text stream conversion here */
-    }
-    /* No need to handle buffers > INT_MAX, as PDCLib doesn't allow them */
-    _PDCLIB_size_t written = 0;
-    int rc;
-    /* Keep trying to write data until everything is written, an error
-       occurs, or the configured number of retries is exceeded.
-    */
-    for ( unsigned int retries = _PDCLIB_IO_RETRIES; retries > 0; --retries )
-    {
-        rc = (int)write( stream->handle, stream->buffer + written, stream->bufidx - written );
-        if ( rc < 0 )
-        {
-            /* Write error */
-            switch ( errno )
-            {
-                /* See <_PDCLIB_config.h>. There should be differenciated errno
-                   handling here, possibly even a 1:1 mapping; but that is up
-                   to the individual platform.
-                */
-                case EBADF:
-                case EFAULT:
-                case EFBIG:
-                case EINTR:
-                case EINVAL:
-                case EIO:
-                case ENOSPC:
-                case EPIPE:
-                    _PDCLIB_errno = _PDCLIB_ERROR;
-                    break;
-                default:
-                    /* This should be something like EUNKNOWN. */
-                    _PDCLIB_errno = _PDCLIB_ERROR;
-                    break;
-            }
-            stream->status |= _PDCLIB_ERRORFLAG;
-            /* Move unwritten remains to begin of buffer. */
-            stream->bufidx -= written;
-            memmove( stream->buffer, stream->buffer + written, stream->bufidx );
-            return EOF;
-        }
-        written += (_PDCLIB_size_t)rc;
-        stream->pos.offset += rc;
-        if ( written == stream->bufidx )
-        {
-            /* Buffer written completely. */
-            stream->bufidx = 0;
-            return 0;
-        }
-    }
-    /* Number of retries exceeded. You probably want a different errno value
-       here.
-    */
-    _PDCLIB_errno = _PDCLIB_ERROR;
-    stream->status |= _PDCLIB_ERRORFLAG;
-    /* Move unwritten remains to begin of buffer. */
-    stream->bufidx -= written;
-    memmove( stream->buffer, stream->buffer + written, stream->bufidx );
+    errno = ENOTSUP;
     return EOF;
 }