misc.cpp File Reference

#include "eve-core.h"
#include "utils/misc.h"
#include "utils/utils_string.h"

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Macros
#define	SIZE   100

Functions
uint16	crc_hqx (const uint8 *data, size_t len, uint16 crc)
int64	filesize (const char *filename)
	Obtains filesize. More...
int64	filesize (FILE *fd)
	Obtains filesize. More...
int64	npowof2 (int64 num)
	Calculates next (greater or equal) power-of-two number. More...
int64	MakeRandomInt (int64 low, int64 high)
	Generates random integer from interval [low; high]. More...
double	MakeRandomFloat (double low, double high)
	Generates random real from interval [low; high]. More...
uint32	CreatePIDFile (const std::string &filename)
	create PID file More...

Variables
static uint16	crc16_table [256]

Macro Definition Documentation

#define SIZE   100

Referenced by EvE::traceStack().

Function Documentation

uint16 crc_hqx	(	const uint8 *	data,
		size_t	len,
		uint16	crc = 0
	)

This is functionally equivalent to python's binascii.crc_hqx.

Parameters

[in]	data	Binary data to be checksumed.
[in]	len	Length of binary data.
[in]	crc	CRC value to start with.

Returns

CRC-16 checksum.

Definition at line 67 of file misc.cpp.

Referenced by PyService::_BuildCachedReturn().

{
    while( len-- )
        crc = ( crc << 8 ) ^ crc16_table[ ( crc >> 8 ) ^ ( *data++ ) ];

    return crc;
}

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uint32 CreatePIDFile

(

const std::string &

filename

)

create PID file

Definition at line 131 of file misc.cpp.

{
    FILE* pid_file = fopen (filename.c_str(), "w" );
    if (pid_file == NULL)
        return 0;

    #ifdef _WIN32
    DWORD pid = GetCurrentProcessId();
    #else
    pid_t pid = getpid();
    #endif

    fprintf(pid_file, "%u", pid );
    fclose(pid_file);

    return (uint32)pid;
}

int64 filesize

(

const char *

filename

)

Obtains filesize.

Parameters

[in]

filename

Name of file to examine.

Returns

Size of file.

Definition at line 75 of file misc.cpp.

References filesize().

Referenced by filesize(), and CachedObjectMgr::LoadCachedFile().

{
    FILE* fd = fopen( filename, "r" );
    if( fd == NULL )
        return 0;

    return filesize( fd );
}

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int64 filesize

(

FILE *

fd

)

Obtains filesize.

Parameters

[in]

fd

Descriptor of file to examine.

Returns

Size of file.

Definition at line 84 of file misc.cpp.

{
#ifdef HAVE_SYS_STAT_H
    struct stat st;
    ::fstat( ::fileno( fd ), &st );
    return st.st_size;
#else /* !HAVE_SYS_STAT_H */
    return ::filelength( ::fileno( fd ) );
#endif /* !HAVE_SYS_STAT_H */
}

double MakeRandomFloat	(	double	low = 0,
		double	high = 1
	)

Generates random real from interval [low; high].

Parameters

[in]	low	Low boundary of interval.
[in]	high	High boundary of interval.

Returns

The generated real.

Definition at line 114 of file misc.cpp.

Referenced by TurretModule::ApplyDamage(), AnomalyMgr::CreateAnomaly(), ShipSE::DamageRandModule(), TurretFormulas::GetDroneToHit(), StaticDataMgr::GetLoot(), TurretFormulas::GetNPCToHit(), DungeonMgr::GetRandLevel(), TurretFormulas::GetSentryToHit(), TurretFormulas::GetToHit(), Sentry::Killed(), NPC::Killed(), ShipSE::Killed(), ActiveModule::LaunchProbe(), PlanetSE::LoadExtras(), DungeonMgr::MakeDungeon(), MakeRandomInt(), GPoint::MakeRandomPointOnSphere(), Vector3D::MakeRandomPointOnSphere(), GPoint::MakeRandomPointOnSphereLayer(), Vector3D::MakeRandomPointOnSphereLayer(), NPCAIMgr::MissileLaunched(), SpawnMgr::PrepSpawn(), ConcordAI::Process(), MiningLaser::ProcessCycle(), DroneAIMgr::SetEngaged(), ConcordAI::SetEngaged(), ConcordAI::SetSignaling(), BeltMgr::SpawnBelt(), NPCAIMgr::Targeted(), and SpawnMgr::WarpOutSpawn().

{
    if( low == high )
        return low;

    static bool seeded = false;
    if( !seeded )
    {
        time_t x = ::time( NULL );
        ::srand( x * ( x % (time_t)( high - low ) ) );
        seeded = true;
    }

    return low + ( high - low ) * ::rand() / RAND_MAX;
}

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int64 MakeRandomInt	(	int64	low = 0,
		int64	high = RAND_MAX
	)

Generates random integer from interval [low; high].

Parameters

[in]	low	Low boundary of interval.
[in]	high	High boundary of interval.

Returns

The generated integer.

Definition at line 109 of file misc.cpp.

References MakeRandomFloat().

Referenced by APIAccountManager::_GenerateAPIKey(), DungeonMgr::AddDecoToVector(), SystemEntity::ApplyDamage(), Prospector::CheckSuccess(), Command_spawn(), Command_spawnn(), PlanetSE::CreateCustomsOffice(), MissionDataMgr::CreateMissionOffer(), SystemEntity::DropLoot(), Prospector::DropSalvage(), Client::Eject(), GenerateKey(), Agent::GetAcceptRsp(), EntityList::GetAnomalyID(), SystemGPoint::GetAnomalyPoint(), Agent::GetCompleteRsp(), Agent::GetDeclineRsp(), AnomalyMgr::GetDungeonType(), StaticDataMgr::GetLoot(), MapData::GetMissionDestination(), SystemManager::GetRandBeltID(), ModuleManager::GetRandModule(), SystemGPoint::GetRandMoon(), SystemGPoint::GetRandPlanet(), SystemGPoint::GetRandPointOnMoon(), SystemGPoint::GetRandPointOnPlanet(), StaticDataMgr::GetRandRatType(), FleetService::GetRandUnitIDs(), Agent::GetStandingsRsp(), CustomsSE::Killed(), StructureSE::Killed(), ShipSE::Killed(), PlanetSE::LoadExtras(), DungeonMgr::MakeDungeon(), SpawnMgr::MakeSpawn(), SpawnMgr::PrepSpawn(), SpawnMgr::ReSpawn(), SystemBubble::SetSpawnTimer(), NPCAIMgr::SetWander(), and BeltMgr::SpawnBelt().

{
    return (int64)MakeRandomFloat( (double)low, (double)high );
}

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int64 npowof2

(

int64

num

)

Calculates next (greater or equal) power-of-two number.

Parameters

[in]

num

Base number.

Returns

Power-of-two number which is greater than or equal to the base number.

Definition at line 95 of file misc.cpp.

Referenced by Buffer::_CalcBufferCapacity().

{
    --num;
    num |= ( num >>  1 );
    num |= ( num >>  2 );
    num |= ( num >>  4 );
    num |= ( num >>  8 );
    num |= ( num >> 16 );
    num |= ( num >> 32 );
    ++num;

    return num;
}

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Variable Documentation

uint16 crc16_table[256]

static

Definition at line 31 of file misc.cpp.