//===-- TimeValue.cpp -------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "lldb/Host/TimeValue.h"
#include "lldb/Host/Config.h"

// C Includes
#include <stddef.h>
#include <time.h>
#include <cstring>

#ifdef _MSC_VER
#include "lldb/Host/windows/windows.h"
#endif

// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Stream.h"


using namespace lldb_private;

//----------------------------------------------------------------------
// TimeValue constructor
//----------------------------------------------------------------------
TimeValue::TimeValue() :
    m_nano_seconds (0)
{
}

//----------------------------------------------------------------------
// TimeValue copy constructor
//----------------------------------------------------------------------
TimeValue::TimeValue(const TimeValue& rhs) :
    m_nano_seconds (rhs.m_nano_seconds)
{
}

TimeValue::TimeValue(const struct timespec& ts) :
    m_nano_seconds ((uint64_t) ts.tv_sec * NanoSecPerSec + ts.tv_nsec)
{
}

TimeValue::TimeValue(uint32_t seconds, uint32_t nanos) :
    m_nano_seconds((uint64_t) seconds * NanoSecPerSec + nanos)
{
}

//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
TimeValue::~TimeValue()
{
}


uint64_t
TimeValue::GetAsNanoSecondsSinceJan1_1970() const
{
    return m_nano_seconds;
}

uint64_t
TimeValue::GetAsMicroSecondsSinceJan1_1970() const
{
    return m_nano_seconds / NanoSecPerMicroSec;
}

uint64_t
TimeValue::GetAsSecondsSinceJan1_1970() const
{
    return m_nano_seconds / NanoSecPerSec;
}


struct timespec
TimeValue::GetAsTimeSpec () const
{
    struct timespec ts;
    ts.tv_sec = m_nano_seconds / NanoSecPerSec;
    ts.tv_nsec = m_nano_seconds % NanoSecPerSec;
    return ts;
}

void
TimeValue::Clear ()
{
    m_nano_seconds = 0;
}

bool
TimeValue::IsValid () const
{
    return m_nano_seconds != 0;
}

void
TimeValue::OffsetWithSeconds (uint64_t sec)
{
    m_nano_seconds += sec * NanoSecPerSec;
}

void
TimeValue::OffsetWithMicroSeconds (uint64_t usec)
{
    m_nano_seconds += usec * NanoSecPerMicroSec;
}

void
TimeValue::OffsetWithNanoSeconds (uint64_t nsec)
{
    m_nano_seconds += nsec;
}

TimeValue
TimeValue::Now()
{
    uint32_t seconds, nanoseconds;
#if _MSC_VER
    SYSTEMTIME st;
    GetSystemTime(&st);
    nanoseconds = st.wMilliseconds * 1000000;
    FILETIME ft;
    SystemTimeToFileTime(&st, &ft);

    seconds = ((((uint64_t)ft.dwHighDateTime) << 32 | ft.dwLowDateTime) / 10000000) - 11644473600ULL;
#else
    struct timeval tv;
    gettimeofday(&tv, NULL);
    seconds = tv.tv_sec;
    nanoseconds = tv.tv_usec * NanoSecPerMicroSec;
#endif
    TimeValue now(seconds, nanoseconds);
    return now;
}

//----------------------------------------------------------------------
// TimeValue assignment operator
//----------------------------------------------------------------------
const TimeValue&
TimeValue::operator=(const TimeValue& rhs)
{
    m_nano_seconds = rhs.m_nano_seconds;
    return *this;
}

void
TimeValue::Dump (Stream *s, uint32_t width) const
{
    if (s == NULL)
        return;

#ifndef LLDB_DISABLE_POSIX
    char time_buf[32];
    time_t time = GetAsSecondsSinceJan1_1970();
    char *time_cstr = ::ctime_r(&time, time_buf);
    if (time_cstr)
    {
        char *newline = ::strpbrk(time_cstr, "\n\r");
        if (newline)
            *newline = '\0';
        if (width > 0)
            s->Printf("%-*s", width, time_cstr);
        else
            s->PutCString(time_cstr);
    }
    else if (width > 0)
        s->Printf("%-*s", width, "");
#endif
}

bool
lldb_private::operator == (const TimeValue &lhs, const TimeValue &rhs)
{
    return lhs.GetAsNanoSecondsSinceJan1_1970() == rhs.GetAsNanoSecondsSinceJan1_1970();
}

bool
lldb_private::operator != (const TimeValue &lhs, const TimeValue &rhs)
{
    return lhs.GetAsNanoSecondsSinceJan1_1970() != rhs.GetAsNanoSecondsSinceJan1_1970();
}

bool
lldb_private::operator <  (const TimeValue &lhs, const TimeValue &rhs)
{
    return lhs.GetAsNanoSecondsSinceJan1_1970() < rhs.GetAsNanoSecondsSinceJan1_1970();
}

bool
lldb_private::operator <= (const TimeValue &lhs, const TimeValue &rhs)
{
    return lhs.GetAsNanoSecondsSinceJan1_1970() <= rhs.GetAsNanoSecondsSinceJan1_1970();
}

bool
lldb_private::operator >  (const TimeValue &lhs, const TimeValue &rhs)
{
    return lhs.GetAsNanoSecondsSinceJan1_1970() > rhs.GetAsNanoSecondsSinceJan1_1970();
}

bool
lldb_private::operator >= (const TimeValue &lhs, const TimeValue &rhs)
{
    return lhs.GetAsNanoSecondsSinceJan1_1970() >= rhs.GetAsNanoSecondsSinceJan1_1970();
}

uint64_t
lldb_private::operator - (const TimeValue &lhs, const TimeValue &rhs)
{
    return lhs.GetAsNanoSecondsSinceJan1_1970() - rhs.GetAsNanoSecondsSinceJan1_1970();
}