/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpiimpl.h"

#include "mpir_info.h"

/* -- Begin Profiling Symbol Block for routine MPI_Info_get */

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_Info_get = PMPI_Info_get

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_Info_get  MPI_Info_get

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_Info_get as PMPI_Info_get

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_Info_get(MPI_Info info, const char *key, int valuelen, char *value, int *flag)

    __attribute__ ((weak, alias("PMPI_Info_get")));

#endif

/* -- End Profiling Symbol Block */

/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build

   the MPI routines */

#ifndef MPICH_MPI_FROM_PMPI

#undef MPI_Info_get

#define MPI_Info_get PMPI_Info_get

#undef FUNCNAME

#define FUNCNAME MPIR_Info_get_impl

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPIR_Info_get_impl(MPIR_Info * info_ptr, const char *key, int valuelen, char *value, int *flag)

{

    MPIR_Info *curr_ptr;

    int err = 0, mpi_errno = 0;

    curr_ptr = info_ptr->next;

    *flag = 0;

    while (curr_ptr) {

        if (!strncmp(curr_ptr->key, key, MPI_MAX_INFO_KEY)) {

            err = MPL_strncpy(value, curr_ptr->value, valuelen + 1);

            /* +1 because the MPI Standard says "In C, valuelen

             * (passed to MPI_Info_get) should be one less than the

             * amount of allocated space to allow for the null

             * terminator*/

            *flag = 1;

            break;

        }

        curr_ptr = curr_ptr->next;

    }

    /* --BEGIN ERROR HANDLING-- */

    if (err != 0) {

        mpi_errno =

            MPIR_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__,

                                 MPI_ERR_INFO_VALUE, "**infovallong", NULL);

    }

    /* --END ERROR HANDLING-- */

    return mpi_errno;

}

#endif

/*@

    MPI_Info_get - Retrieves the value associated with a key

Input Parameters:

+ info - info object (handle)

. key - key (string)

- valuelen - length of value argument, not including null terminator (integer)

Output Parameters:

+ value - value (string)

- flag - true if key defined, false if not (boolean)

.N ThreadSafeInfoRead

.N Fortran

.N Errors

.N MPI_SUCCESS

.N MPI_ERR_OTHER

.N MPI_ERR_INFO_KEY

.N MPI_ERR_ARG

.N MPI_ERR_INFO_VALUE

@*/

#undef FUNCNAME

#define FUNCNAME MPI_Info_get

#undef FCNAME

#define FCNAME MPL_QUOTE(FUNCNAME)

int MPI_Info_get(MPI_Info info, const char *key, int valuelen, char *value, int *flag)

{

    MPIR_Info *info_ptr = 0;

    int mpi_errno = MPI_SUCCESS;

    MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_INFO_GET);

    MPIR_ERRTEST_INITIALIZED_ORDIE();

    MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_INFO_GET);

    /* Validate parameters, especially handles needing to be converted */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            MPIR_ERRTEST_INFO(info, mpi_errno);

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* Convert MPI object handles to object pointers */

    MPIR_Info_get_ptr(info, info_ptr);

    /* Validate parameters and objects (post conversion) */

#ifdef HAVE_ERROR_CHECKING

    {

        MPID_BEGIN_ERROR_CHECKS;

        {

            int keylen;

            /* Validate info_ptr */

            MPIR_Info_valid_ptr(info_ptr, mpi_errno);

            if (mpi_errno)

                goto fn_fail;

            /* Check key */

            MPIR_ERR_CHKANDJUMP((!key), mpi_errno, MPI_ERR_INFO_KEY, "**infokeynull");

            keylen = (int) strlen(key);

            MPIR_ERR_CHKANDJUMP((keylen > MPI_MAX_INFO_KEY), mpi_errno,

                                MPI_ERR_INFO_KEY, "**infokeylong");

            MPIR_ERR_CHKANDJUMP((keylen == 0), mpi_errno, MPI_ERR_INFO_KEY, "**infokeyempty");

            /* Check value arguments */

            MPIR_ERRTEST_ARGNEG(valuelen, "valuelen", mpi_errno);

            MPIR_ERR_CHKANDSTMT((!value), mpi_errno, MPI_ERR_INFO_VALUE, goto fn_fail,

                                "**infovalnull");

        }

        MPID_END_ERROR_CHECKS;

    }

#endif /* HAVE_ERROR_CHECKING */

    /* ... body of routine ...  */

    mpi_errno = MPIR_Info_get_impl(info_ptr, key, valuelen, value, flag);

    /* ... end of body of routine ... */

    if (mpi_errno)

        goto fn_fail;

  fn_exit:

    MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_INFO_GET);

    MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);

    return mpi_errno;

    /* --BEGIN ERROR HANDLING-- */

  fn_fail:

#ifdef HAVE_ERROR_CHECKING

    {

        mpi_errno = MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE,

                                         FCNAME, __LINE__, MPI_ERR_OTHER,

                                         "**mpi_info_get",

                                         "**mpi_info_get %I %s %d %p %p", info, key, valuelen,

                                         value, flag);

    }

    mpi_errno = MPIR_Err_return_comm(NULL, FCNAME, mpi_errno);

#endif

    goto fn_exit;

    /* --END ERROR HANDLING-- */

}