Add optional args to XLEN to specify start ID and direction #1251
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…tion Syntax: `XLEN stream_name [entry_id] [direction]`. Where direction can be '-' or '+' (special IDs mean respectively the first and the last elements in the stream). Default value: '+'. If an optional entry ID is specified, the XLEN command returns the number of entries between that ID and the first/last element of the stream. The element with the specified ID is not considered - it serves as an exclusive boundary. If the stream doesn't contain an entry with the specified ID, the command starts counting from the closest entry to the first/last element in the stream. If the specified ID is equal to or greater than the last entry ID and: a) direction is '+' - the command returns 0 b) direction is '-' - the command returns stream's size If the specified ID is equal to or less than the first entry ID and: a) direction is '-' the command returns 0 b) direction is '+' the command returns stream's size This feature is helpful in finding: a) how many entries in the stream were processed so far a) how many unprocessed (ahead of the current one) entries are in the stream Complexity: O(n)
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Thanks all. Merging... |
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Syntax:
XLEN stream_name [entry_id] [direction].Where direction can be '-' or '+' (special IDs mean respectively the first and the last elements in the stream). Default value: '+'.
If an optional entry ID is specified, the XLEN command returns the number of entries between that ID and the first/last element of the stream.
The element with the specified ID is not considered - it serves as an exclusive boundary. If the stream doesn't contain an entry with the specified ID, the command starts counting from the closest entry to the first/last element in the stream.
If the specified ID is equal to or greater than the last entry ID and:
a) direction is '+' - the command returns 0
b) direction is '-' - the command returns the stream's size
If the specified ID is equal to or less than the first entry ID and:
a) direction is '-' the command returns 0
b) direction is '+' the command returns stream's size
This feature is helpful in finding:
a) how many entries in the stream were processed so far
b) how many unprocessed entries (ahead of the current one) are in the stream
Complexity: O(n)