ucar.grib
Class GribNumbers

java.lang.Object
  ucar.grib.GribNumbers

public final class GribNumbers
extends Object

A class that contains several static methods for converting multiple bytes into one float or integer.

Version:

2.0

Author:

Robb Kambic 10/20/04

Field Summary

static int	BIT_1 Bit mask for bit 1 in an octet
static int	BIT_2 Bit mask for bit 1 in an octet
static int	BIT_3 Bit mask for bit 1 in an octet
static int	BIT_4 Bit mask for bit 1 in an octet
static int	BIT_5 Bit mask for bit 1 in an octet
static int	BIT_6 Bit mask for bit 1 in an octet
static int	BIT_7 Bit mask for bit 1 in an octet
static int	BIT_8 Bit mask for bit 1 in an octet
static int	MISSING Grib uses this internal to mean missing
static int	UNDEFINED if missing value is not defined use this value.

Constructor Summary

GribNumbers()

Method Summary

static boolean	closeEnough(double v1, double v2)
static float	float4(int a, int b, int c, int d) Convert 4 bytes to a float.
static float	float4(RandomAccessFile raf) Convert 4 bytes into a float value.
static int	int2(int a, int b) convert 2 bytes to a signed integer.
static int	int2(RandomAccessFile raf) Convert 2 bytes into a signed integer.
static int	int3(int a, int b, int c) Convert 3 bytes to signed integer.
static int	int3(RandomAccessFile raf) Convert 3 bytes into a signed integer.
static int	int4(int a, int b, int c, int d) Convert 4 bytes into a signed integer.
static int	int4(RandomAccessFile raf) Convert 4 bytes into a signed integer.
static long	int8(RandomAccessFile raf) Convert 8 bytes into a signed long.
static boolean	isBitSet(int value, int bitMask) Is the bit set in this octet
static int	uint2(int a, int b) convert 2 bytes to an unsigned integer.
static int	uint2(RandomAccessFile raf) Convert 2 bytes into an unsigned integer.
static int	uint3(int a, int b, int c) Convert 3 bytes into an unsigned int.
static int	uint3(RandomAccessFile raf) Convert 3 bytes into an unsigned integer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UNDEFINED

public static final int UNDEFINED

if missing value is not defined use this value.

See Also:

Constant Field Values

MISSING

public static final int MISSING

Grib uses this internal to mean missing

See Also:

Constant Field Values

BIT_1

public static final int BIT_1

Bit mask for bit 1 in an octet

See Also:

Constant Field Values

BIT_2

public static final int BIT_2

Bit mask for bit 1 in an octet

See Also:

Constant Field Values

BIT_3

public static final int BIT_3

Bit mask for bit 1 in an octet

See Also:

Constant Field Values

BIT_4

public static final int BIT_4

Bit mask for bit 1 in an octet

See Also:

Constant Field Values

BIT_5

public static final int BIT_5

Bit mask for bit 1 in an octet

See Also:

Constant Field Values

BIT_6

public static final int BIT_6

Bit mask for bit 1 in an octet

See Also:

Constant Field Values

BIT_7

public static final int BIT_7

Bit mask for bit 1 in an octet

See Also:

Constant Field Values

BIT_8

public static final int BIT_8

Bit mask for bit 1 in an octet

See Also:

Constant Field Values

Constructor Detail

GribNumbers

public GribNumbers()

Method Detail

int2

public static int int2(RandomAccessFile raf)
                throws IOException

Convert 2 bytes into a signed integer.

Parameters:

raf -

Returns:

integer value

Throws:

IOException

int2

public static int int2(int a,
                       int b)

convert 2 bytes to a signed integer.

Parameters:

a -

b -

Returns:

int

int3

public static int int3(RandomAccessFile raf)
                throws IOException

Convert 3 bytes into a signed integer.

Parameters:

raf -

Returns:

integer value

Throws:

IOException

int3

public static int int3(int a,
                       int b,
                       int c)

Convert 3 bytes to signed integer.

Parameters:

a -

b -

c -

Returns:

int

int4

public static int int4(RandomAccessFile raf)
                throws IOException

Convert 4 bytes into a signed integer.

Parameters:

raf -

Returns:

integer value

Throws:

IOException

int4

public static int int4(int a,
                       int b,
                       int c,
                       int d)

Convert 4 bytes into a signed integer.

Parameters:

a -

b -

c -

d -

Returns:

int

uint2

public static int uint2(RandomAccessFile raf)
                 throws IOException

Convert 2 bytes into an unsigned integer.

Parameters:

raf -

Returns:

integer value

Throws:

IOException

uint2

public static int uint2(int a,
                        int b)

convert 2 bytes to an unsigned integer.

Parameters:

a -

b -

Returns:

unsigned int

uint3

public static int uint3(RandomAccessFile raf)
                 throws IOException

Convert 3 bytes into an unsigned integer.

Parameters:

raf -

Returns:

integer

Throws:

IOException

uint3

public static int uint3(int a,
                        int b,
                        int c)

Convert 3 bytes into an unsigned int.

Parameters:

a -

b -

c -

Returns:

unsigned integer

float4

public static float float4(RandomAccessFile raf)
                    throws IOException

Convert 4 bytes into a float value.

Parameters:

raf -

Returns:

float value

Throws:

IOException

float4

public static float float4(int a,
                           int b,
                           int c,
                           int d)

Convert 4 bytes to a float.

Parameters:

a -

b -

c -

d -

Returns:

float

int8

public static long int8(RandomAccessFile raf)
                 throws IOException

Convert 8 bytes into a signed long.

Parameters:

raf - RandomAccessFile

Returns:

long value

Throws:

IOException

isBitSet

public static boolean isBitSet(int value,
                               int bitMask)

Is the bit set in this octet

Parameters:

value - octet as an integer

bitMask - bit mask

Returns:

true if the bit is not 0

closeEnough

public static boolean closeEnough(double v1,
                                  double v2)