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grep: implement -x for fixed strings #742

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Merged
merged 1 commit into from
Sep 23, 2024
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grep: implement -x for fixed strings #742

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27 changes: 19 additions & 8 deletions bin/grep
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Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,7 @@ use File::Basename qw(basename);
use File::Spec;
use Getopt::Std;

our $VERSION = '1.002';
our $VERSION = '1.003';

$| = 1; # autoflush output

Expand Down Expand Up @@ -199,15 +199,26 @@ sub parse_args {
}

if ($no_re) {
if ($opt{'w'} || $opt{'x'} || $opt{'H'} || $opt{'u'}) {
die("$Me: -H, -u, -w and -x are incompatible with -F\n");
if ($opt{'H'} || $opt{'u'} || $opt{'w'}) {
die "$Me: -H, -u and -w are incompatible with -F\n";
}
my $testop = $opt{'v'} ? '==' : '!=';
if ($opt{'i'}) {
$match_code = "for my \$pat (\@patterns) { \$Matches++ if (index(lc \$_, lc \$pat) $testop -1) }";
if ($opt{'x'}) { # exact match
my $testop = $opt{'v'} ? 'ne' : 'eq';
if ($opt{'i'}) {
$match_code = "my \$c=\$_; chomp \$c; for my \$pat (\@patterns) {\$Matches++ if (lc(\$c) $testop lc(\$pat)) }";
}
else { # case sensitive
$match_code = "my \$c=\$_; chomp \$c; for my \$pat (\@patterns) {\$Matches++ if (\$c $testop \$pat) }";
}
}
else { # case sensitive
$match_code = "for my \$pat (\@patterns) { \$Matches++ if (index(\$_, \$pat) $testop -1) }";
else { # regular match
my $testop = $opt{'v'} ? '==' : '!=';
if ($opt{'i'}) {
$match_code = "for my \$pat (\@patterns) { \$Matches++ if (index(lc \$_, lc \$pat) $testop -1) }";
}
else { # case sensitive
$match_code = "for my \$pat (\@patterns) { \$Matches++ if (index(\$_, \$pat) $testop -1) }";
}
}
$matcher = eval "sub { $match_code }";
die if $@;
Expand Down
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