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grep: add pmatch and eflags arguments to match_one_pattern()
Push pmatch and eflags to the callers of match_one_pattern(), which allows them to specify regex execution flags and to get the location of a match. Since we only use the first element of the matches array and aren't interested in submatches, no provision is made for callers to provide a larger array. eflags are ignored for fixed patterns, but that's OK, since they only have a meaning in connection with regular expressions containing ^ or $. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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