Performance: replaced some regular expressions with string functions

Using regular expressions provides more uniform code, but at the cost of
higher runtime, since Perl doesn't optimize them away, even if they are
very simple, like those emulating the startswith() or endswith() functions
that other languages provide.

1 files changed, 30 insertions, 36 deletions

diff --git a/pkgtools/pkglint/files/pkglint.pl b/pkgtools/pkglint/files/pkglint.pl
index 1d7f571e491..a8f8a573603 100644
--- a/pkgtools/pkglint/files/pkglint.pl
+++ b/pkgtools/pkglint/files/pkglint.pl
@@ -1,5 +1,5 @@
 #! @PERL@
-# $NetBSD: pkglint.pl,v 1.883 2015/10/11 14:31:36 rillig Exp $
+# $NetBSD: pkglint.pl,v 1.884 2015/10/11 18:16:50 rillig Exp $
 #
 
 # pkglint - static analyzer and checker for pkgsrc packages
@@ -6754,13 +6754,13 @@ sub checkfile_PLIST($) {
 	foreach my $line (@{$extra_lines}, @{$lines}) {
 		my $text = $line->text;
 
-		if ($text =~ m"\$\{([\w_]+)\}(.*)") {
+		if (index($text, '${') != -1 && $text =~ m"\$\{([\w_]+)\}(.*)") {
 			if (defined($pkgctx_plist_subst_cond) && exists($pkgctx_plist_subst_cond->{$1})) {
 				$opt_debug_misc and $line->log_debug("Removed PLIST_SUBST conditional $1.");
 				$text = $2;
 			}
 		}
-		
+
 		if ($text =~ m"^[\w\$]") {
 			$all_files->{$text} = $line;
 			my $dir = $text;
@@ -6768,7 +6768,7 @@ sub checkfile_PLIST($) {
 				$all_dirs->{$dir} = $line;
 			}
 		}
-		if ($text =~ m"^\@exec \$\{MKDIR\} %D/(.*)$") {
+		if (substr($text, 0, 1) eq '@' && $text =~ m"^\@exec \$\{MKDIR\} %D/(.*)$") {
 			my $dir = $1;
 			do {
 				$all_dirs->{$dir} = $line;
@@ -6786,7 +6786,7 @@ sub checkfile_PLIST($) {
 		}
 
 		# @foo directives.
-		if ($text =~ /^(?:\$\{[\w_]+\})?\@([a-z-]+)\s+(.*)/) {
+		if (index($text, '@') != -1 && $text =~ /^(?:\$\{[\w_]+\})?\@([a-z-]+)\s+(.*)/) {
 			my ($cmd, $arg) = ($1, $2);
 
 			if ($cmd eq "unexec" && $arg =~ m"^(rmdir|\$\{RMDIR\} \%D/)(.*)") {
@@ -6847,11 +6847,11 @@ sub checkfile_PLIST($) {
 				$last_file_seen = $text;
 			}
 
-			if ($basename =~ m"\$\{IMAKE_MANNEWSUFFIX\}") {
+			if (index($basename, '${IMAKE_MANNEWSUFFIX}') != -1) {
 				warn_about_PLIST_imake_mannewsuffix($line);
 			}
 
-			if ($dirname =~ m"^bin/") {
+			if (substr($dirname, 0, 4) eq "bin/") {
 				$line->log_warning("The bin/ directory should not have subdirectories.");
 
 			} elsif ($dirname eq "bin") {
@@ -6871,25 +6871,25 @@ sub checkfile_PLIST($) {
 "section 8.");
 				}
 
-			} elsif ($text =~ m"^doc/") {
+			} elsif (substr($text, 0, 4) eq "doc/") {
 				$line->log_error("Documentation must be installed under share/doc, not doc.");
 
-			} elsif ($text =~ m"^etc/rc\.d/") {
+			} elsif (substr($text, 0, 9) eq "etc/rc.d/") {
 				$line->log_error("RCD_SCRIPTS must not be registered in the PLIST. Please use the RCD_SCRIPTS framework.");
 
-			} elsif ($text =~ m"^etc/") {
+			} elsif (substr($text, 0, 4) eq "etc/") {
 				my $f = "mk/pkginstall/bsd.pkginstall.mk";
 
 				assert(-f "${cwd_pkgsrcdir}/${f}", "${cwd_pkgsrcdir}/${f} is not a regular file.");
 				$line->log_error("Configuration files must not be registered in the PLIST. Please use the CONF_FILES framework, which is described in ${f}.");
 
-			} elsif ($text =~ m"^include/.*\.(?:h|hpp)$") {
+			} elsif (substr($text, 0, 8) eq "include/" && $text =~ m"^include/.*\.(?:h|hpp)$") {
 				# Fine.
 
 			} elsif ($text eq "info/dir") {
 				$line->log_error("\"info/dir\" must not be listed. Use install-info to add/remove an entry.");
 
-			} elsif ($text =~ m"^info/.+$") {
+			} elsif (substr($text, 0, 5) eq "info/" && length($text) > 5) {
 				if (defined($pkgctx_vardef) && !exists($pkgctx_vardef->{"INFO_FILES"})) {
 					$line->log_warning("Packages that install info files should set INFO_FILES.");
 				}
@@ -6897,10 +6897,10 @@ sub checkfile_PLIST($) {
 			} elsif (defined($effective_pkgbase) && $text =~ m"^lib/\Q${effective_pkgbase}\E/") {
 				# Fine.
 
-			} elsif ($text =~ m"^lib/locale/") {
+			} elsif (substr($text, 0, 11) eq "lib/locale/") {
 				$line->log_error("\"lib/locale\" must not be listed. Use \${PKGLOCALEDIR}/locale and set USE_PKGLOCALEDIR instead.");
 
-			} elsif ($text =~ m"^(lib/(?:.*/)*)([^/]+)\.(so|a|la)$") {
+			} elsif (substr($text, 0, 4) eq "lib/" && $text =~ m"^(lib/(?:.*/)*)([^/]+)\.(so|a|la)$") {
 				my ($dir, $lib, $ext) = ($1, $2, $3);
 
 				if ($dir eq "lib/" && $lib !~ m"^lib") {
@@ -6912,7 +6912,7 @@ sub checkfile_PLIST($) {
 					}
 				}
 
-			} elsif ($text =~ m"^man/(cat|man)(\w+)/(.*?)\.(\w+)(\.gz)?$") {
+			} elsif (substr($text, 0, 4) eq "man/" && $text =~ m"^man/(cat|man)(\w+)/(.*?)\.(\w+)(\.gz)?$") {
 				my ($cat_or_man, $section, $manpage, $ext, $gz) = ($1, $2, $3, $4, $5);
 
 				if ($section !~ m"^[\dln]$") {
@@ -6942,14 +6942,14 @@ sub checkfile_PLIST($) {
 "or not.");
 				}
 
-			} elsif ($text =~ m"^man/cat") {
+			} elsif (substr($text, 0, 7) eq "man/cat") {
 				$line->log_warning("Invalid filename \"${text}\" for preformatted manual page.");
 
-			} elsif ($text =~ m"^man/man") {
+			} elsif (substr($text, 0, 7) eq "man/man") {
 				$line->log_warning("Invalid filename \"${text}\" for unformatted manual page.");
 
-			} elsif ($text =~ m"^sbin/(.*)") {
-				my ($binname) = ($1);
+			} elsif (substr($text, 0, 5) eq "sbin/") {
+				my $binname = substr($text, 5);
 
 				if (!exists($all_files->{"man/man8/${binname}.8"})) {
 					$opt_warn_extra and $line->log_warning("Manual page missing for sbin/${binname}.");
@@ -6960,7 +6960,7 @@ sub checkfile_PLIST($) {
 "section 1.");
 				}
 
-			} elsif ($text =~ m"^share/applications/.*\.desktop$") {
+			} elsif (substr($text, 0, 6) eq "share/" && $text =~ m"^share/applications/.*\.desktop$") {
 				my $f = "../../sysutils/desktop-file-utils/desktopdb.mk";
 				if (defined($pkgctx_included) && !exists($pkgctx_included->{$f})) {
 					$line->log_warning("Packages that install a .desktop entry may .include \"$f\".");
@@ -6970,7 +6970,7 @@ sub checkfile_PLIST($) {
 "Otherwise, this warning is harmless.");
 				}
 
-			} elsif ($pkgpath ne "graphics/hicolor-icon-theme" && $text =~ m"^share/icons/hicolor(?:$|/)") {
+			} elsif (substr($text, 0, 6) eq "share/" && $pkgpath ne "graphics/hicolor-icon-theme" && $text =~ m"^share/icons/hicolor(?:$|/)") {
 				my $f = "../../graphics/hicolor-icon-theme/buildlink3.mk";
 				if (defined($pkgctx_included) && !exists($pkgctx_included->{$f})) {
 					$line->log_error("Please .include \"$f\" in the Makefile");
@@ -6979,7 +6979,7 @@ sub checkfile_PLIST($) {
 "maintained. The hicolor-icon-theme package takes care of that.");
 				}
 
-			} elsif ($pkgpath ne "graphics/gnome-icon-theme" && $text =~ m"^share/icons/gnome(?:$|/)") {
+			} elsif (substr($text, 0, 6) eq "share/" && $pkgpath ne "graphics/gnome-icon-theme" && $text =~ m"^share/icons/gnome(?:$|/)") {
 				my $f = "../../graphics/gnome-icon-theme/buildlink3.mk";
 				if (defined($pkgctx_included) && !exists($pkgctx_included->{$f})) {
 					$line->log_error("Please .include \"$f\"");
@@ -6989,30 +6989,24 @@ sub checkfile_PLIST($) {
 			} elsif ($dirname eq "share/aclocal" && $basename =~ m"\.m4$") {
 				# Fine.
 
-			} elsif ($text =~ m"^share/doc/html/") {
+			} elsif (substr($text, 0, 15) eq "share/doc/html/") {
 				$opt_warn_plist_depr and $line->log_warning("Use of \"share/doc/html\" is deprecated. Use \"share/doc/\${PKGBASE}\" instead.");
 
-			} elsif (defined($effective_pkgbase) && $text =~ m"^share/doc/\Q${effective_pkgbase}\E/") {
-				# Fine.
-
-			} elsif (defined($effective_pkgbase) && $text =~ m"^share/examples/\Q${effective_pkgbase}\E/") {
-				# Fine.
-
-			} elsif (defined($effective_pkgbase) && $text =~ m"^share/\Q${effective_pkgbase}\E/") {
+			} elsif (defined($effective_pkgbase) && $text =~ m"^share/(?:doc/|examples/|)\Q${effective_pkgbase}\E/") {
 				# Fine.
 
 			} elsif ($pkgpath ne "graphics/hicolor-icon-theme" && $text =~ m"^share/icons/hicolor/icon-theme\.cache") {
 				$line->log_error("Please .include \"../../graphics/hicolor-icon-theme/buildlink3.mk\" and remove this line.");
 
-			} elsif ($text =~ m"^share/info/") {
+			} elsif (substr($text, 0, 11) eq "share/info/") {
 				$line->log_warning("Info pages should be installed into info/, not share/info/.");
 				$line->explain_warning(
 "To fix this, you should add INFO_FILES=yes to the package Makefile.");
 
-			} elsif ($text =~ m"^share/locale/[\w\@_]+/LC_MESSAGES/[^/]+\.mo$") {
+			} elsif (substr($text, -3) eq ".mo" && $text =~ m"^share/locale/[\w\@_]+/LC_MESSAGES/[^/]+\.mo$") {
 				# Fine.
 
-			} elsif ($text =~ m"^share/man/") {
+			} elsif (substr($text, 0, 10) eq "share/man/") {
 				$line->log_warning("Man pages should be installed into man/, not share/man/.");
 
 			} else {
@@ -7023,13 +7017,13 @@ sub checkfile_PLIST($) {
 				$line->log_warning("PLIST contains \${PKGLOCALEDIR}, but USE_PKGLOCALEDIR was not found.");
 			}
 
-			if ($text =~ m"/CVS/") {
+			if (index($text, "/CVS/") != -1) {
 				$line->log_warning("CVS files should not be in the PLIST.");
 			}
-			if ($text =~ m"\.orig$") {
+			if (substr($text, -5) eq ".orig") {
 				$line->log_warning(".orig files should not be in the PLIST.");
 			}
-			if ($text =~ m"/perllocal\.pod$") {
+			if (substr($text, -14) eq "/perllocal.pod") {
 				$line->log_warning("perllocal.pod files should not be in the PLIST.");
 				$line->explain_warning(
 "This file is handled automatically by the INSTALL/DEINSTALL scripts,",