Search engine having multiple co-processors for performing inexact pattern search operations
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United States of America Patent
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Nov 24, 2009
Grant Date -
Mar 20, 2008
app pub date -
Sep 19, 2006
filing date -
Sep 19, 2006
priority date (Note) -
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Abstract
A search engine configured to determine whether an input string including a plurality of input characters matches a regular expression including an inexact pattern including a specified range of instances of pattern characters each belonging to a specified set of characters, the search engine including a microcontroller having an input to receive a microprogram embodying the inexact pattern, a first co-processor coupled to the microcontroller and dedicated to determine whether each input character in a first portion of the input string is a member of the specified set of characters, and a second co-processor coupled to the microcontroller and dedicated to determine whether the number of input characters in the first portion of the input string falls within the specified range.
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