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25 lines
842 B
Python
25 lines
842 B
Python
from __future__ import absolute_import, division, print_function, unicode_literals
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import sys
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from ripple.ledger.Args import ARGS
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from ripple.util import Log
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from ripple.util import Range
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from ripple.util import Search
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def search(server):
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"""Yields a stream of ledger numbers that match the given condition."""
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condition = lambda number: ARGS.condition(server, number)
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ledgers = server.ledgers
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if ARGS.binary:
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try:
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position = Search.FIRST if ARGS.position == 'first' else Search.LAST
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yield Search.binary_search(
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ledgers[0], ledgers[-1], condition, position)
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except:
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Log.fatal('No ledgers matching condition "%s".' % condition,
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file=sys.stderr)
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else:
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for x in Search.linear_search(ledgers, condition):
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yield x
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