/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/* 
 *
 *   Copyright (C) 2013 UChicago/Argonne, LLC
 *   See COPYRIGHT notice in top-level directory.
 */

#include "adio.h"
#include "hint_fns.h"


int ADIOI_Info_check_and_install_int(ADIO_File fd, MPI_Info info, const char *key, 
	int *local_cache, char *funcname, int *error_code)
{
    int intval, tmp_val, flag, ret=0;
    char *value;

    value = (char *) ADIOI_Malloc((MPI_MAX_INFO_VAL+1)*sizeof(char));
    if (value == NULL) {
        *error_code = MPIO_Err_create_code(*error_code,
                                           MPIR_ERR_RECOVERABLE,
                                           funcname,
                                           __LINE__,
                                           MPI_ERR_OTHER,
                                           "**nomem2",0);
        return -1;
    }

    ADIOI_Info_get(info, key, MPI_MAX_INFO_VAL, value, &flag);
    if (flag) {
	intval = atoi(value);
	tmp_val = intval;

	MPI_Bcast(&tmp_val, 1, MPI_INT, 0, fd->comm);
	/* --BEGIN ERROR HANDLING-- */
	if (tmp_val != intval) {
	    MPIO_ERR_CREATE_CODE_INFO_NOT_SAME(funcname,
		    key, 
		    error_code);
	    ret = -1;
	    goto fn_exit;
	}
	/* --END ERROR HANDLING-- */

	ADIOI_Info_set(fd->info, key, value);
	/* some file systems do not cache hints in the fd struct */
	if (local_cache != NULL) *local_cache = intval;
    }
fn_exit:
    ADIOI_Free(value);
    return ret;
}

int ADIOI_Info_check_and_install_enabled(ADIO_File fd, MPI_Info info, const char *key, 
	int *local_cache, char *funcname, int *error_code)
{
    int tmp_val, flag, ret=0;
    char *value;

    value = (char *) ADIOI_Malloc((MPI_MAX_INFO_VAL+1)*sizeof(char));
    if (value == NULL) {
        *error_code = MPIO_Err_create_code(*error_code,
                                           MPIR_ERR_RECOVERABLE,
                                           funcname,
                                           __LINE__,
                                           MPI_ERR_OTHER,
                                           "**nomem2",0);
        return -1;
    }

    ADIOI_Info_get(info, key, MPI_MAX_INFO_VAL, value, &flag);
    if (flag) {
	if (!strcmp(value, "enable") || !strcmp(value, "ENABLE")) {
	    ADIOI_Info_set(fd->info, key, value);
	    *local_cache = ADIOI_HINT_ENABLE;
	}
	else if (!strcmp(value, "disable") || !strcmp(value, "DISABLE")) {
	    ADIOI_Info_set(fd->info, key, value);
	    *local_cache = ADIOI_HINT_DISABLE;
	}
	else if (!strcmp(value, "automatic") || !strcmp(value, "AUTOMATIC"))
	{
	    ADIOI_Info_set(fd->info, key, value);
	    *local_cache = ADIOI_HINT_AUTO;
	}

	tmp_val = *local_cache;

	MPI_Bcast(&tmp_val, 1, MPI_INT, 0, fd->comm);
	/* --BEGIN ERROR HANDLING-- */
	if (tmp_val != *local_cache) {
	    MPIO_ERR_CREATE_CODE_INFO_NOT_SAME(funcname,
		    key,
		    error_code);
	    ret = -1;
	    goto fn_exit;
	}
	/* --END ERROR HANDLING-- */
    }
fn_exit:
    ADIOI_Free(value);
    return ret;
}
int ADIOI_Info_check_and_install_true(ADIO_File fd, MPI_Info info, const char *key, 
	int *local_cache, char *funcname, int *error_code)
{
    int flag, tmp_val, ret=0;
    char *value;

    value = (char *) ADIOI_Malloc((MPI_MAX_INFO_VAL+1)*sizeof(char));
    if (value == NULL) {
        *error_code = MPIO_Err_create_code(*error_code,
                                           MPIR_ERR_RECOVERABLE,
                                           funcname,
                                           __LINE__,
                                           MPI_ERR_OTHER,
                                           "**nomem2",0);
        return -1;
    }

    ADIOI_Info_get(info, key, MPI_MAX_INFO_VAL, value, &flag);
    if (flag) {
	if (!strcmp(value, "true") || !strcmp(value, "TRUE")) {
	    ADIOI_Info_set(fd->info, key, value);
	    *local_cache = 1;
	}
	else if (!strcmp(value, "false") || !strcmp(value, "FALSE")) {
	    ADIOI_Info_set(fd->info, key, value);
	    *local_cache = 0;
	}
	tmp_val = *local_cache;

	MPI_Bcast(&tmp_val, 1, MPI_INT, 0, fd->comm);
	/* --BEGIN ERROR HANDLING-- */
	if (tmp_val != *local_cache) {
	    MPIO_ERR_CREATE_CODE_INFO_NOT_SAME(funcname,
		    key,
		    error_code);
	    ret = -1;
	    goto fn_exit;
	}
	/* --END ERROR HANDLING-- */
    }
fn_exit:
    ADIOI_Free(value);
    return ret;
}
int ADIOI_Info_check_and_install_str(ADIO_File fd, MPI_Info info, const char *key, 
	char **local_cache, char *funcname, int *error_code)
{
    int flag, ret=0;
    size_t len;
    char *value;

    value = (char *) ADIOI_Malloc((MPI_MAX_INFO_VAL+1)*sizeof(char));
    if (value == NULL) {
        *error_code = MPIO_Err_create_code(*error_code,
                                           MPIR_ERR_RECOVERABLE,
                                           funcname,
                                           __LINE__,
                                           MPI_ERR_OTHER,
                                           "**nomem2",0);
        return -1;
    }

    ADIOI_Info_get(info, key, MPI_MAX_INFO_VAL,
	    value, &flag);
    if (flag) {
	ADIOI_Info_set(fd->info, "cb_config_list", value);
	len = (strlen(value)+1) * sizeof(char);
	*local_cache = ADIOI_Malloc(len);
	if (*local_cache == NULL) {
	    *error_code = MPIO_Err_create_code(*error_code,
		    MPIR_ERR_RECOVERABLE,
		    funcname,
		    __LINE__,
		    MPI_ERR_OTHER,
		    "**nomem2",0);
	    ret = -1;
	    goto fn_exit;
	}
	ADIOI_Strncpy(*local_cache, value, len);
    }
    /* if it has been set already, we ignore it the second time. 
     * otherwise we would get an error if someone used the same
     * info value with a cb_config_list value in it in a couple
     * of calls, which would be irritating. */
fn_exit:
    ADIOI_Free(value);
    return ret;
}