Difference between revisions of "Data types"
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! style="background:#ffdead;" width="650" |Definition | ! style="background:#ffdead;" width="650" |Definition | ||
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| − | | | + | | UINT1 || 8 [[Wikipedia:Binary_digit|bits]] (one [[Wikipedia:byte|byte]]) |
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| − | | | + | |SINT1||1-byte signed integer |
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| − | | | + | |UINT2||2byte unsigned integer. MSB first |
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| − | | | + | |UINT4||4byte unsigned integer. MSB first |
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| − | | | + | |BITMAP[1..n]||nbits bitmap (multiple of 8). Always fills whole bytes. <br\>- Unused bits in last byte is set to 0. <br\>- First bit is the most significant (leftmost) bit in first byte.<br\>- Bits are numbered from 1, a byte contains bits 1..8. |
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| − | | | + | |VBITMAP[1..n]||Variable length bitmap with n bits. (n is a multiple of 8.) |
| − | Structure:<br\> | + | Structure:<br\>UINT1 - containing the number of bytes in the following bitmap. <br\>bitmap - always fills whole bytes. <br\>- Unused bits in last byte is set to 0. <br\>- First bit is the most significant (leftmost) bit in first byte. |
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| − | | | + | |TEXT16||16 characters (bytes) of text. Padded with spaces. <br\>ASCII values > 32 (0x20) only. |
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| − | | | + | |CLOCK||Date & time structure:<br\>UINT2 Year (yyyy)<br\>UINT1 Month (mm)<br\>UINT1 Day (dd)<br\>UINT1 Hour (hh)<br\>UINT1 Minutes (mm)<br\>UINT1 Seconds (ss) |
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| − | |[[NET_OBJ_REF]]|| | + | |[[NET_OBJ_REF]]||AlphaCom Intercom Object Reference. <br\>Can both encode directory numbers and physical numbers |
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Revision as of 11:12, 22 June 2007
The following table identifies the data types used in the application data of the AlphaNet Data Protocol:
| Data Type | Definition |
|---|---|
| UINT1 | 8 bits (one byte) |
| SINT1 | 1-byte signed integer |
| UINT2 | 2byte unsigned integer. MSB first |
| UINT4 | 4byte unsigned integer. MSB first |
| BITMAP[1..n] | nbits bitmap (multiple of 8). Always fills whole bytes. <br\>- Unused bits in last byte is set to 0. <br\>- First bit is the most significant (leftmost) bit in first byte.<br\>- Bits are numbered from 1, a byte contains bits 1..8. |
| VBITMAP[1..n] | Variable length bitmap with n bits. (n is a multiple of 8.)
Structure:<br\>UINT1 - containing the number of bytes in the following bitmap. <br\>bitmap - always fills whole bytes. <br\>- Unused bits in last byte is set to 0. <br\>- First bit is the most significant (leftmost) bit in first byte. |
| TEXT16 | 16 characters (bytes) of text. Padded with spaces. <br\>ASCII values > 32 (0x20) only. |
| CLOCK | Date & time structure:<br\>UINT2 Year (yyyy)<br\>UINT1 Month (mm)<br\>UINT1 Day (dd)<br\>UINT1 Hour (hh)<br\>UINT1 Minutes (mm)<br\>UINT1 Seconds (ss) |
| NET_OBJ_REF | AlphaCom Intercom Object Reference. <br\>Can both encode directory numbers and physical numbers |