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