package handle_configs; # $Id$ use diagnostics; use strict; use common; sub searchstr { # Preceed all characters which are special characters in regexps with # a backslash, so that the returned string used in a regexp searches # a literal occurence of the original string. White space is replaced # by "\s+" # "quotemeta()" does not serve for this, as it also quotes some regular # characters, as the space my ($s) = @_; $s =~ s!([\\/\(\)\[\]\{\}\|\.\$\@\%\*\?#\+\-])!\\$1!g; return $s; } sub read_directives { # Read one or more occurences of a directive my ($lines_ptr, $directive) = @_; my $searchdirective = searchstr($directive); # do not use if_() below because it slow down printerdrake # to the point one can believe in process freeze: map { (/^\s*$searchdirective\s+(\S.*)$/ ? chomp_($1) : ()) } @$lines_ptr; } sub read_unique_directive { # Read a directive, if the directive appears more than once, use # the last occurence and remove all the others, if it does not # occur, return the default value my ($lines_ptr, $directive, $default) = @_; if ((my @d = read_directives($lines_ptr, $directive)) > 0) { my $value = $d[-1]; set_directive($lines_ptr, "$directive $value"); return $value; } else { return $default; } } sub insert_directive { # Insert a directive only if it is not already there my ($lines_ptr, $directive) = @_; my $searchdirective = searchstr($directive); (/^\s*$searchdirective$/ and return 0) foreach @$lines_ptr; push @$lines_ptr, "$directive\n"; return 1; } sub remove_directive { # Remove a directive my ($lines_ptr, $directive) = @_; my $success = 0; my $searchdirective = searchstr($directive); (/^\s*$searchdirective/ and $_ = "" and $success = 1) foreach @$lines_ptr; return $success; } sub comment_directive { # Comment out a directive my ($lines_ptr, $directive, $exactmatch) = @_; my $success = 0; my $searchdirective = searchstr($directive); $searchdirective .= ".*" if !$exactmatch; (s/^\s*($searchdirective)$/#$1/ and $success = 1) foreach @$lines_ptr; return $success; } sub replace_directive { # Replace a directive, if it appears more than once, remove # the additional occurences. my ($lines_ptr, $olddirective, $newdirective) = @_; my $success = 0; $newdirective = "$newdirective\n"; my $searcholddirective = searchstr($olddirective); (/^\s*$searcholddirective/ and $_ = $newdirective and $success = 1 and $newdirective = "") foreach @$lines_ptr; return $success; } sub move_directive_to_version_commented_out { # If there is a version of the directive "commentedout" which is # commented out, the directive "directive" will be moved in its place. my ($lines_ptr, $commentedout, $directive, $exactmatch) = @_; my $success = 0; my $searchcommentedout = searchstr($commentedout); $searchcommentedout .= ".*" if !$exactmatch; (/^\s*#$searchcommentedout$/ and $success = 1 and last) foreach @$lines_ptr; if ($success) { remove_directive($lines_ptr, $directive); (s/^\s*#($searchcommentedout)$/$directive/ and $success = 1 and last) foreach @$lines_ptr; } return $success; } sub set_directive { # Set a directive, replace the old definition or a commented definition my ($lines_ptr, $directive, $full_line) = @_; my $olddirective = $directive; if (!$full_line) { $olddirective =~ s/^\s*(\S+)\s+.*$/$1/s; $olddirective ||= $directive; } my $success = (replace_directive($lines_ptr, $olddirective, $directive) || insert_directive($lines_ptr, $directive)); if ($success) { move_directive_to_version_commented_out($lines_ptr, $directive, $directive, 1); } return $success; } sub add_directive { # Add a directive, replace a commented definition my ($lines_ptr, $directive) = @_; my $success = insert_directive($lines_ptr, $directive); if ($success) { move_directive_to_version_commented_out($lines_ptr, $directive, $directive, 1); } return $success; } 1; 437eaf1b46b606c1aa3f6eb17b5'>diffstats
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authorThierry Vignaud <tv@mandriva.org>2007-06-15 13:40:00 +0000
committerThierry Vignaud <tv@mandriva.org>2007-06-15 13:40:00 +0000
commitdd1c7ed129f9d437eaf1b46b606c1aa3f6eb17b5 (patch)
tree8c7650f7b1727912793d760fc03623f0ba2cec39 /docs/README.devel
parent7fb9411fc13883babc39c5c0e5184abaca4851bb (diff)
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add support for snd-cmi8788 driver
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