/* -*- C -*-
 *
 * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2006 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
 *
 * $HEADER$
 *
 */
#ifndef ORTE_DSS_INTERNAL_H_
#define ORTE_DSS_INTERNAL_H_

#include "orte_config.h"

#include "orte/orte_constants.h"
#include "orte/class/orte_pointer_array.h"

#include "orte/dss/dss.h"

#if HAVE_STRING_H
#    if !defined(STDC_HEADERS) && HAVE_MEMORY_H
#        include <memory.h>
#    endif
#    include <string.h>
#endif

#if defined(c_plusplus) || defined(__cplusplus)
extern "C" {
#endif

/*
 * The default starting chunk size
 */
#define ORTE_DSS_DEFAULT_INITIAL_SIZE  128
/*
 * The default threshold size when we switch from doubling the 
 * buffer size to addatively increasing it
 */
#define ORTE_DSS_DEFAULT_THRESHOLD_SIZE 1024

/*
 * Internal type corresponding to size_t.  Do not use this in
 * interface calls - use ORTE_SIZE instead.
 */
#if SIZEOF_SIZE_T == 1
#define DSS_TYPE_SIZE_T ORTE_UINT8
#elif SIZEOF_SIZE_T == 2
#define DSS_TYPE_SIZE_T ORTE_UINT16
#elif SIZEOF_SIZE_T == 4
#define DSS_TYPE_SIZE_T ORTE_UINT32
#elif SIZEOF_SIZE_T == 8
#define DSS_TYPE_SIZE_T ORTE_UINT64
#else
#error Unsupported size_t size!
#endif

/*
 * Internal type corresponding to bool.  Do not use this in interface
 * calls - use ORTE_BOOL instead.
 */
#if SIZEOF_BOOL == 1
#define DSS_TYPE_BOOL ORTE_UINT8
#elif SIZEOF_BOOL == 2
#define DSS_TYPE_BOOL ORTE_UINT16
#elif SIZEOF_BOOL == 4
#define DSS_TYPE_BOOL ORTE_UINT32
#elif SIZEOF_BOOL == 8
#define DSS_TYPE_BOOL ORTE_UINT64
#else
#error Unsupported bool size!
#endif

/*
 * Internal type corresponding to int and unsigned int.  Do not use
 * this in interface calls - use ORTE_INT / ORTE_UINT instead.
 */
#if SIZEOF_INT == 1
#define DSS_TYPE_INT ORTE_INT8
#define DSS_TYPE_UINT ORTE_UINT8
#elif SIZEOF_INT == 2
#define DSS_TYPE_INT ORTE_INT16
#define DSS_TYPE_UINT ORTE_UINT16
#elif SIZEOF_INT == 4
#define DSS_TYPE_INT ORTE_INT32
#define DSS_TYPE_UINT ORTE_UINT32
#elif SIZEOF_INT == 8
#define DSS_TYPE_INT ORTE_INT64
#define DSS_TYPE_UINT ORTE_UINT64
#else
#error Unsupported int size!
#endif

/*
 * Internal type corresponding to pid_t.  Do not use this in interface
 * calls - use ORTE_PID instead.
 */
#if SIZEOF_PID_T == 1
#define DSS_TYPE_PID_T ORTE_UINT8
#elif SIZEOF_PID_T == 2
#define DSS_TYPE_PID_T ORTE_UINT16
#elif SIZEOF_PID_T == 4
#define DSS_TYPE_PID_T ORTE_UINT32
#elif SIZEOF_PID_T == 8
#define DSS_TYPE_PID_T ORTE_UINT64
#else
#error Unsupported pid_t size!
#endif

/* Unpack generic size macros */
#define UNPACK_SIZE_MISMATCH(unpack_type, remote_type, ret)      \
do { \
    switch(remote_type) { \
        case ORTE_UINT8: \
            UNPACK_SIZE_MISMATCH_FOUND(unpack_type, uint8_t, remote_type); \
            break; \
        case ORTE_INT8: \
            UNPACK_SIZE_MISMATCH_FOUND(unpack_type, int8_t, remote_type); \
            break; \
        case ORTE_UINT16: \
            UNPACK_SIZE_MISMATCH_FOUND(unpack_type, uint16_t, remote_type); \
            break; \
        case ORTE_INT16: \
            UNPACK_SIZE_MISMATCH_FOUND(unpack_type, int16_t, remote_type); \
            break; \
        case ORTE_UINT32: \
            UNPACK_SIZE_MISMATCH_FOUND(unpack_type, uint32_t, remote_type); \
            break; \
        case ORTE_INT32: \
            UNPACK_SIZE_MISMATCH_FOUND(unpack_type, int32_t, remote_type); \
            break; \
        case ORTE_UINT64: \
            UNPACK_SIZE_MISMATCH_FOUND(unpack_type, uint64_t, remote_type); \
            break; \
        case ORTE_INT64: \
            UNPACK_SIZE_MISMATCH_FOUND(unpack_type, int64_t, remote_type); \
            break; \
        default: \
            ret = ORTE_ERR_NOT_FOUND; \
            ORTE_ERROR_LOG(ret); \
    } \
} while (0)
        
/* NOTE: do not need to deal with endianness here, as the unpacking of
the underling sender-side type will do that for us.  Repeat: the
data in tmpbuf[] is already in host byte order. */
#define UNPACK_SIZE_MISMATCH_FOUND(unpack_type, tmptype, tmpdsstype)        \
do {                                                                    \
    orte_std_cntr_t i;                                                  \
    tmptype *tmpbuf = (tmptype*)malloc(sizeof(tmptype) * (*num_vals));  \
    ret = orte_dss_unpack_buffer(buffer, tmpbuf, num_vals, tmpdsstype); \
    for (i = 0 ; i < *num_vals ; ++i) {                                 \
        ((unpack_type*) dest)[i] = (unpack_type)(tmpbuf[i]);            \
    }                                                                   \
    free(tmpbuf);                                                       \
} while (0)
            
            
/**
 * Internal struct used for holding registered dss functions
 */
struct orte_dss_type_info_t {
    opal_object_t super;
    /* type identifier */
    orte_data_type_t odti_type;
    /** Debugging string name */
    char *odti_name;
    /** Pack function */
    orte_dss_pack_fn_t odti_pack_fn;
    /** Unpack function */
    orte_dss_unpack_fn_t odti_unpack_fn;
    /** copy function */
    orte_dss_copy_fn_t odti_copy_fn;
    /** compare function */
    orte_dss_compare_fn_t odti_compare_fn;
    /** size function */
    orte_dss_size_fn_t odti_size_fn;
    /** print function */
    orte_dss_print_fn_t odti_print_fn;
    /** Release function */
    orte_dss_release_fn_t odti_release_fn;
    /** flag to indicate structured data */
    bool odti_structured;
};
/**
 * Convenience typedef
 */
typedef struct orte_dss_type_info_t orte_dss_type_info_t;
ORTE_DECLSPEC OBJ_CLASS_DECLARATION(orte_dss_type_info_t);

/*
 * globals needed within dss
 */
extern bool orte_dss_initialized;
extern bool orte_dss_debug;
extern int orte_dss_verbose;
extern int orte_dss_initial_size;
extern int orte_dss_threshold_size;
extern orte_pointer_array_t *orte_dss_types;
extern orte_data_type_t orte_dss_num_reg_types;

    /*
     * Implementations of API functions
     */

    int orte_dss_set(orte_data_value_t *value, void *new_value, orte_data_type_t type);

    int orte_dss_get(void **data, orte_data_value_t *value, orte_data_type_t type);

    int orte_dss_arith(orte_data_value_t *value, orte_data_value_t *operand, orte_dss_arith_op_t operation);

    int orte_dss_increment(orte_data_value_t *value);

    int orte_dss_decrement(orte_data_value_t *value);

    int orte_dss_set_buffer_type(orte_buffer_t *buffer, orte_dss_buffer_type_t type);

    int orte_dss_pack(orte_buffer_t *buffer, void *src,
                      orte_std_cntr_t num_vals,
                      orte_data_type_t type);
    int orte_dss_unpack(orte_buffer_t *buffer, void *dest,
                        orte_std_cntr_t *max_num_vals,
                        orte_data_type_t type);

    int orte_dss_copy(void **dest, void *src, orte_data_type_t type);

    int orte_dss_compare(void *value1, void *value2,
                         orte_data_type_t type);

    int orte_dss_print(char **output, char *prefix, void *src, orte_data_type_t type);

    int orte_dss_dump(int output_stream, void *src, orte_data_type_t type);

    int orte_dss_size(size_t *size, void *src, orte_data_type_t type);

    int orte_dss_peek(orte_buffer_t *buffer, orte_data_type_t *type,
                      orte_std_cntr_t *number);

    int orte_dss_peek_type(orte_buffer_t *buffer, orte_data_type_t *type);

    int orte_dss_unload(orte_buffer_t *buffer, void **payload,
                        orte_std_cntr_t *bytes_used);
    int orte_dss_load(orte_buffer_t *buffer, void *payload, orte_std_cntr_t bytes_used);

    int orte_dss_xfer_payload(orte_buffer_t *dest, orte_buffer_t *src);

    int orte_dss_copy_payload(orte_buffer_t *dest, orte_buffer_t *src);

    int orte_dss_register(orte_dss_pack_fn_t pack_fn,
                          orte_dss_unpack_fn_t unpack_fn,
                          orte_dss_copy_fn_t copy_fn,
                          orte_dss_compare_fn_t compare_fn,
                          orte_dss_size_fn_t size_fn,
                          orte_dss_print_fn_t print_fn,
                          orte_dss_release_fn_t release_fn,
                          bool structured,
                          const char *name, orte_data_type_t *type);

    void orte_dss_release(orte_data_value_t *value);

    char *orte_dss_lookup_data_type(orte_data_type_t type);

    void orte_dss_dump_data_types(int output);

    /*
     * Non-API functions
     */
    int orte_dss_pack_buffer(orte_buffer_t *buffer, void *src, orte_std_cntr_t num_vals,
                  orte_data_type_t type);

    int orte_dss_unpack_buffer(orte_buffer_t *buffer, void *dst, orte_std_cntr_t *num_vals,
                    orte_data_type_t type);

    /*
     * Internal pack functions
     */

    int orte_dss_pack_null(orte_buffer_t *buffer, void *src,
                           orte_std_cntr_t num_vals, orte_data_type_t type);
    int orte_dss_pack_byte(orte_buffer_t *buffer, void *src,
                           orte_std_cntr_t num_vals, orte_data_type_t type);

    int orte_dss_pack_bool(orte_buffer_t *buffer, void *src,
                           orte_std_cntr_t num_vals, orte_data_type_t type);

    int orte_dss_pack_int(orte_buffer_t *buffer, void *src,
                          orte_std_cntr_t num_vals, orte_data_type_t type);
    int orte_dss_pack_int16(orte_buffer_t *buffer, void *src,
                            orte_std_cntr_t num_vals, orte_data_type_t type);
    int orte_dss_pack_int32(orte_buffer_t *buffer, void *src,
                            orte_std_cntr_t num_vals, orte_data_type_t type);
    int orte_dss_pack_int64(orte_buffer_t *buffer, void *src,
                            orte_std_cntr_t num_vals, orte_data_type_t type);

    int orte_dss_pack_sizet(orte_buffer_t *buffer, void *src,
                            orte_std_cntr_t num_vals, orte_data_type_t type);

    int orte_dss_pack_pid(orte_buffer_t *buffer, void *src,
                          orte_std_cntr_t num_vals, orte_data_type_t type);

    int orte_dss_pack_string(orte_buffer_t *buffer, void *src,
                             orte_std_cntr_t num_vals, orte_data_type_t type);

    int orte_dss_pack_std_cntr(orte_buffer_t *buffer, void *src, orte_std_cntr_t num,
                               orte_data_type_t type);

    int orte_dss_pack_data_type(orte_buffer_t *buffer, void *src,
                           orte_std_cntr_t num_vals, orte_data_type_t type);

#if OPAL_ENABLE_FT == 1
    int orte_dss_pack_ckpt_cmd(orte_buffer_t *buffer, void *src,
                               orte_std_cntr_t num_vals, orte_data_type_t type);
#endif

    int orte_dss_pack_data_value(orte_buffer_t *buffer, void *src,
                           orte_std_cntr_t num_vals, orte_data_type_t type);

    int orte_dss_pack_byte_object(orte_buffer_t *buffer, void *src,
                           orte_std_cntr_t num_vals, orte_data_type_t type);

    /*
     * Internal unpack functions
     */

    int orte_dss_unpack_null(orte_buffer_t *buffer, void *dest,
                             orte_std_cntr_t *num_vals, orte_data_type_t type);
    int orte_dss_unpack_byte(orte_buffer_t *buffer, void *dest,
                             orte_std_cntr_t *num_vals, orte_data_type_t type);

    int orte_dss_unpack_bool(orte_buffer_t *buffer, void *dest,
                             orte_std_cntr_t *num_vals, orte_data_type_t type);

    int orte_dss_unpack_int(orte_buffer_t *buffer, void *dest,
                            orte_std_cntr_t *num_vals, orte_data_type_t type);
    int orte_dss_unpack_int16(orte_buffer_t *buffer, void *dest,
                              orte_std_cntr_t *num_vals, orte_data_type_t type);
    int orte_dss_unpack_int32(orte_buffer_t *buffer, void *dest,
                              orte_std_cntr_t *num_vals, orte_data_type_t type);
    int orte_dss_unpack_int64(orte_buffer_t *buffer, void *dest,
                              orte_std_cntr_t *num_vals, orte_data_type_t type);

    int orte_dss_unpack_sizet(orte_buffer_t *buffer, void *dest,
                              orte_std_cntr_t *num_vals, orte_data_type_t type);

    int orte_dss_unpack_pid(orte_buffer_t *buffer, void *dest,
                            orte_std_cntr_t *num_vals, orte_data_type_t type);

    int orte_dss_unpack_string(orte_buffer_t *buffer, void *dest,
                               orte_std_cntr_t *num_vals, orte_data_type_t type);

    int orte_dss_unpack_std_cntr(orte_buffer_t *buffer, void *dest, orte_std_cntr_t *num,
                             orte_data_type_t type);

    int orte_dss_unpack_data_type(orte_buffer_t *buffer, void *dest,
                             orte_std_cntr_t *num_vals, orte_data_type_t type);

#if OPAL_ENABLE_FT == 1
    int orte_dss_unpack_ckpt_cmd(orte_buffer_t *buffer, void *dest,
                                 orte_std_cntr_t *num_vals, orte_data_type_t type);
#endif

    int orte_dss_unpack_data_value(orte_buffer_t *buffer, void *dest,
                             orte_std_cntr_t *num_vals, orte_data_type_t type);

    int orte_dss_unpack_byte_object(orte_buffer_t *buffer, void *dest,
                             orte_std_cntr_t *num_vals, orte_data_type_t type);

    /*
     * Internal copy functions
     */

    int orte_dss_std_copy(void **dest, void *src, orte_data_type_t type);

    int orte_dss_copy_null(char **dest, char *src, orte_data_type_t type);

    int orte_dss_copy_string(char **dest, char *src, orte_data_type_t type);

    int orte_dss_copy_byte_object(orte_byte_object_t **dest, orte_byte_object_t *src,
                                  orte_data_type_t type);

    int orte_dss_copy_data_value(orte_data_value_t **dest, orte_data_value_t *src,
                                  orte_data_type_t type);
    /*
     * Internal compare functions
     */

    int orte_dss_compare_bool(bool *value1, bool *value2, orte_data_type_t type);

    int orte_dss_compare_int(int *value1, int *value2, orte_data_type_t type);
    int orte_dss_compare_uint(uint *value1, uint *value2, orte_data_type_t type);

    int orte_dss_compare_size(size_t *value1, size_t *value2, orte_data_type_t type);

    int orte_dss_compare_pid(pid_t *value1, pid_t *value2, orte_data_type_t type);

    int orte_dss_compare_byte(char *value1, char *value2, orte_data_type_t type);
    int orte_dss_compare_char(char *value1, char *value2, orte_data_type_t type);
    int orte_dss_compare_int8(int8_t *value1, int8_t *value2, orte_data_type_t type);
    int orte_dss_compare_uint8(uint8_t *value1, uint8_t *value2, orte_data_type_t type);

    int orte_dss_compare_int16(int16_t *value1, int16_t *value2, orte_data_type_t type);
    int orte_dss_compare_uint16(uint16_t *value1, uint16_t *value2, orte_data_type_t type);

    int orte_dss_compare_int32(int32_t *value1, int32_t *value2, orte_data_type_t type);
    int orte_dss_compare_uint32(uint32_t *value1, uint32_t *value2, orte_data_type_t type);

    int orte_dss_compare_int64(int64_t *value1, int64_t *value2, orte_data_type_t type);
    int orte_dss_compare_uint64(uint64_t *value1, uint64_t *value2, orte_data_type_t type);

    int orte_dss_compare_null(char *value1, char *value2, orte_data_type_t type);

    int orte_dss_compare_string(char *value1, char *value2, orte_data_type_t type);

    int orte_dss_compare_std_cntr(orte_std_cntr_t *value1, orte_std_cntr_t *value2, orte_data_type_t type);

    int orte_dss_compare_dt(orte_data_type_t *value1, orte_data_type_t *value2, orte_data_type_t type);

#if OPAL_ENABLE_FT == 1
    int orte_dss_compare_ckpt_cmd(size_t *value1, size_t *value2, orte_data_type_t type);
#endif

    int orte_dss_compare_data_value(orte_data_value_t *value1, orte_data_value_t *value2, orte_data_type_t type);

    int orte_dss_compare_byte_object(orte_byte_object_t *value1, orte_byte_object_t *value2, orte_data_type_t type);

    /*
    * Internal size functions
    */
    int orte_dss_std_size(size_t *size, void *src, orte_data_type_t type);

    int orte_dss_size_string(size_t *size, char *src, orte_data_type_t type);

    int orte_dss_size_data_value(size_t *size, orte_data_value_t *src, orte_data_type_t type);

    int orte_dss_size_byte_object(size_t *size, orte_byte_object_t *src, orte_data_type_t type);

    /*
    * Internal print functions
    */
    int orte_dss_print_byte(char **output, char *prefix, uint8_t *src, orte_data_type_t type);

    int orte_dss_print_string(char **output, char *prefix, char *src, orte_data_type_t type);

    int orte_dss_print_size(char **output, char *prefix, size_t *src, orte_data_type_t type);
    int orte_dss_print_pid(char **output, char *prefix, pid_t *src, orte_data_type_t type);
    int orte_dss_print_bool(char **output, char *prefix, bool *src, orte_data_type_t type);
    int orte_dss_print_int(char **output, char *prefix, int *src, orte_data_type_t type);
    int orte_dss_print_uint(char **output, char *prefix, int *src, orte_data_type_t type);
    int orte_dss_print_uint8(char **output, char *prefix, uint8_t *src, orte_data_type_t type);
    int orte_dss_print_uint16(char **output, char *prefix, uint16_t *src, orte_data_type_t type);
    int orte_dss_print_uint32(char **output, char *prefix, uint32_t *src, orte_data_type_t type);
    int orte_dss_print_int8(char **output, char *prefix, int8_t *src, orte_data_type_t type);
    int orte_dss_print_int16(char **output, char *prefix, int16_t *src, orte_data_type_t type);
    int orte_dss_print_int32(char **output, char *prefix, int32_t *src, orte_data_type_t type);
#ifdef HAVE_INT64_T
    int orte_dss_print_uint64(char **output, char *prefix, uint64_t *src, orte_data_type_t type);
    int orte_dss_print_int64(char **output, char *prefix, int64_t *src, orte_data_type_t type);
#else
    int orte_dss_print_uint64(char **output, char *prefix, void *src, orte_data_type_t type);
    int orte_dss_print_int64(char **output, char *prefix, void *src, orte_data_type_t type);
#endif
    int orte_dss_print_null(char **output, char *prefix, void *src, orte_data_type_t type);
    int orte_dss_print_std_cntr(char **output, char *prefix, orte_std_cntr_t *src, orte_data_type_t type);
    int orte_dss_print_data_type(char **output, char *prefix, orte_data_type_t *src, orte_data_type_t type);
#if OPAL_ENABLE_FT == 1
    int orte_dss_print_ckpt_cmd(char **output, char *prefix, size_t *src, orte_data_type_t type);
#endif
    int orte_dss_print_data_value(char **output, char *prefix, orte_data_value_t *src, orte_data_type_t type);
    int orte_dss_print_byte_object(char **output, char *prefix, orte_byte_object_t *src, orte_data_type_t type);


    /*
    * Internal release functions
    */
    void orte_dss_std_release(orte_data_value_t *value);

    void orte_dss_std_obj_release(orte_data_value_t *value);

    void orte_dss_release_byte_object(orte_data_value_t *value);

    /*
     * Internal helper functions
     */

    char* orte_dss_buffer_extend(orte_buffer_t *bptr, size_t bytes_to_add);

    bool orte_dss_too_small(orte_buffer_t *buffer, size_t bytes_reqd);

    orte_dss_type_info_t* orte_dss_find_type(orte_data_type_t type);

    int orte_dss_store_data_type(orte_buffer_t *buffer, orte_data_type_t type);

    int orte_dss_get_data_type(orte_buffer_t *buffer, orte_data_type_t *type);

#if defined(c_plusplus) || defined(__cplusplus)
}
#endif
#endif