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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include "opal/dss/dss_internal.h"
int opal_dss_peek(opal_buffer_t *buffer, opal_data_type_t *type,
int32_t *num_vals)
{
int ret;
opal_buffer_t tmp;
int32_t n=1;
opal_data_type_t local_type;
/* check for errors */
if (buffer == NULL) {
return OPAL_ERR_BAD_PARAM;
}
/* Double check and ensure that there is data left in the buffer. */
if (buffer->unpack_ptr >= buffer->base_ptr + buffer->bytes_used) {
*type = OPAL_NULL;
*num_vals = 0;
return OPAL_ERR_UNPACK_READ_PAST_END_OF_BUFFER;
}
/* if this is NOT a fully described buffer, then that is as much as
* we can do - there is no way we can tell the caller what type is
* in the buffer since that info wasn't stored.
*/
if (OPAL_DSS_BUFFER_FULLY_DESC != buffer->type) {
*type = OPAL_UNDEF;
*num_vals = 0;
return OPAL_ERR_UNKNOWN_DATA_TYPE;
}
/* cheat: unpack from a copy of the buffer -- leaving all the
original pointers intact */
tmp = *buffer;
if (OPAL_SUCCESS != (ret = opal_dss_get_data_type(&tmp, &local_type))) {
*type = OPAL_NULL;
*num_vals = 0;
return ret;
}
if (OPAL_INT32 != local_type) { /* if the length wasn't first, then error */
*type = OPAL_NULL;
*num_vals = 0;
return OPAL_ERR_UNPACK_FAILURE;
}
if (OPAL_SUCCESS != (ret = opal_dss_unpack_int32(&tmp, num_vals, &n, OPAL_INT32))) {
*type = OPAL_NULL;
*num_vals = 0;
return ret;
}
if (OPAL_SUCCESS != (ret = opal_dss_get_data_type(&tmp, type))) {
*type = OPAL_NULL;
*num_vals = 0;
}
return ret;
}
int opal_dss_peek_type(opal_buffer_t *buffer, opal_data_type_t *type)
{
int ret;
opal_buffer_t tmp;
/* check for errors */
if (buffer == NULL) {
return OPAL_ERR_BAD_PARAM;
}
/* if this is NOT a fully described buffer, then there isn't anything
* we can do - there is no way we can tell the caller what type is
* in the buffer since that info wasn't stored.
*/
if (OPAL_DSS_BUFFER_FULLY_DESC != buffer->type) {
*type = OPAL_UNDEF;
return OPAL_ERR_UNKNOWN_DATA_TYPE;
}
/* Double check and ensure that there is data left in the buffer. */
if (buffer->unpack_ptr >= buffer->base_ptr + buffer->bytes_used) {
*type = OPAL_UNDEF;
return OPAL_ERR_UNPACK_READ_PAST_END_OF_BUFFER;
}
/* cheat: unpack from a copy of the buffer -- leaving all the
original pointers intact */
tmp = *buffer;
if (OPAL_SUCCESS != (ret = opal_dss_get_data_type(&tmp, type))) {
*type = OPAL_UNDEF;
return ret;
}
return OPAL_SUCCESS;
}
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