/* IBM_PROLOG_BEGIN_TAG                                                   */
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/* $Source: src/import/generic/memory/lib/utils/c_str.H $                 */
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///
/// @file c_str.H
/// @brief Function to return the C-string name of a thing
///
// *HWP HWP Owner: Andre Marin <aamarin@us.ibm.com>
// *HWP HWP Backup: Jacob Harvey <jlharvey@us.ibm.com>
// *HWP Team: Memory
// *HWP Level: 3
// *HWP Consumed by: HB:FSP

#ifndef _MSS_C_STR_H_
#define _MSS_C_STR_H_

#include <fapi2.H>
#include <generic/memory/lib/utils/index.H>

namespace mss
{

// Thread local storage for the string we're going to create.
//TODO RTC:153924 Remove the else case when issue is resolved
#ifndef PLAT_NO_THREAD_LOCAL_STORAGE
    extern thread_local char c_str_storage[fapi2::MAX_ECMD_STRING_LEN];
#else
    extern char c_str_storage[fapi2::MAX_ECMD_STRING_LEN];
#endif

///
/// @brief non-target c_str general declaration
/// @tparam T - type you want the const char * for
/// @param[in] i_input - input you want the const char * for
/// @return const char *
///
template< typename T >
const char* c_str( const T& i_input );

///
/// @brief fapi2::Target c_str general declaration
/// @tparam T - fapi2::TargetType you want the name for
/// @param[in] i_target - target you want the name for
/// @return const char *
///
template< fapi2::TargetType T >
inline const char* c_str( const fapi2::template Target<T>& i_target )
{
    fapi2::toString( i_target, c_str_storage, fapi2::MAX_ECMD_STRING_LEN );
    return c_str_storage;
}

template<>
inline const char* c_str( const fapi2::template Target<fapi2::TARGET_TYPE_DIMM>& i_target )
{
    const auto l_mca = i_target.getParent<fapi2::TARGET_TYPE_MCA>();
    const auto l_mcs = l_mca.getParent<fapi2::TARGET_TYPE_MCS>();

    constexpr auto l_max_gen = 3;
    constexpr auto l_max_type = 4;
    const char* const l_map_gen_to_string[l_max_gen] = {"empty", "DDR3", "DDR4"};
    const char* const l_map_type_to_string[l_max_type] = {"empty", "RDIMM", "UDIMM", "LRDIMM"};

    uint8_t l_type = 0;
    uint8_t l_gen = 0;
    char l_buffer[fapi2::MAX_ECMD_STRING_LEN] = {};

    fapi2::toString( i_target, c_str_storage, fapi2::MAX_ECMD_STRING_LEN );

    // Had to unroll FAPI_TRY so that fapi2::current_err doesn't get overwritten, causes errors
    // when calling c_str inside of a function that returns fapi2::ReturnCode
    constexpr size_t PORTS_PER_MCS = 2;
    constexpr size_t MAX_DIMM_PER_PORT = 2;
    uint8_t l_value[PORTS_PER_MCS][MAX_DIMM_PER_PORT] = {};

    if (FAPI_ATTR_GET(fapi2::ATTR_EFF_DIMM_TYPE, l_mcs, l_value) != fapi2::FAPI2_RC_SUCCESS)
    {
        goto fapi_try_exit;
    }

    l_type = l_value[mss::index(l_mca)][mss::index(i_target)];

    if (l_type >= l_max_type)
    {
        goto fapi_try_exit;
    }

    // Had to unroll FAPI_TRY so that fapi2::current_err doesn't get overwritten, causes errors
    // when calling c_str inside of a function that returns fapi2::ReturnCode
    if (FAPI_ATTR_GET(fapi2::ATTR_EFF_DRAM_GEN, l_mcs, l_value) != fapi2::FAPI2_RC_SUCCESS)
    {
        goto fapi_try_exit;
    }

    l_gen = l_value[mss::index(l_mca)][mss::index(i_target)];

    if (l_gen >= l_max_gen)
    {
        goto fapi_try_exit;
    }

    snprintf(l_buffer, fapi2::MAX_ECMD_STRING_LEN, " %s (%s)", l_map_type_to_string[l_type], l_map_gen_to_string[l_gen]);
    return strncat( c_str_storage, l_buffer, fapi2::MAX_ECMD_STRING_LEN - strlen(c_str_storage) );

fapi_try_exit:
    // Probably the best we're going to do ...
    return c_str_storage;
}

}
#endif