BYTE2TYPE

Purpose:

Converts a raw byte stream to series of a specific data type.

Syntax:

BYTE2TYPE(series, datatype, byteswap)

series	-	A series, the byte values to convert.
datatype	-	Optional. An integer, the binary data type for the output values described by either its macro name or integer code. Defaults to DOUBLE. Valid arguments are:

Name	Code	Data Type	Range
INT8 SBYTE	1	8-bit Signed Byte	-128 to +127
UINT8 UBYTE BYTE	2	8-bit Unsigned Byte	0 to 255
INT16 SINT	3	16-bit (2-byte) Signed Integer	-32768 to +32767
UINT16 UINT	4	16-bit (2-byte) Unsigned Integer	0 to 65535
INT32 LONG	5	32-bit (4-byte) Signed Integer	-2,147,483,648 to +2,147,483,647
FLOAT	6	32-bit (4-byte) Floating Point	-10³⁷ to +10³⁸
DOUBLE	7	64-bit (8-byte) Floating Point	-10^-307 to +10³⁰⁸
UINT32 ULONG	8	32-bit (4-byte) Unsigned Integer	0 to 4,294,967,295
INT64	9	64-bit (8-byte) Signed Integer	-9,223,372,036,854,775,808 to +9,223,372,036,854,775,807
UINT64	10	64-bit (8-byte) Unsigned Integer	0 to 18,446,744,073,709,551,615
	1000 + N	N-byte Signed Integer	-2^8N-1 to 2^8N-1-1
	2000 + N	N-byte Unsigned Integer	0 to 2^8N-1

byteswap

Optional. An integer, the byte order flag:

0	:	preserve byte order (default)
1	:	swap byte order

Returns:

A series.

Example:

W1: grand(10, 1)

W2: type2byte(w1)

W3: byte2type(W2)

W2 contains a 80 point series where every 8 values is the byte representation of the corresponding double value in W1. W3 converts the byte values of W2 to double precision and recovers the original data.

Example:

W1: grand(10, 1)

W2: type2byte(w1, float)

W3: byte2type(W2, float)

Same as above except the data is converted to 4 byte floats. The series in W2 is 40 bytes long where every 4 values is the byte representation of the corresponding float value in W1. W3 converts the byte values of W2 to float precision and recovers the original data.

Example:

W1: type2byte(int(100 * gsin(100, 1/100, 2)), 1003);

writeb("sbin.dat", ubyte, W1);

W2: readb("sbin.dat", ubyte);

W3: byte2type(W2, 1003);

A sinewave of 3 byte signed integers is created by TYPE2BYTE and written to the file sbin.dat. The data is read as a stream of unsigned bytes and BYTE2TYPE converts the data to the original 3 byte signed integer format. The special datatype value of 1000 + N specifies an N byte signed integer value.

Remarks:

BYTE2TYPE uses CASTBYTE to convert the input byte stream.

BYTE2TYPE also supports N byte integer format to read signed or unsigned multiple bytes as integer values. A datatype value of 1000 + N specifies N byte signed integer values and 2000 + N specifies N byte unsigned integer values. For example:

1003

implies a 3 byte signed integer values.

2005

implies a 5 byte unsigned integer values.

See TYPE2BYTE to convert a series of a specific type to a raw byte stream.

BYTE2TYPE

Purpose:

Syntax:

Returns:

Example:

Example:

Example:

Remarks:

See Also: