5.004_69: Parsewords.pm: avoid undefined warnings

[perl5.git] / lib / complete.pl

diff --git a/lib/complete.pl b/lib/complete.pl
index fd50674..539f2f7 100644 (file)
--- a/lib/complete.pl
+++ b/lib/complete.pl
@@ -1,5 +1,5 @@
 ;#
-;#     @(#)complete.pl 1.0 (sun!waynet) 11/11/88
+;#      @(#)complete.pl,v1.1            (me@anywhere.EBay.Sun.COM) 09/23/91
 ;#
 ;# Author: Wayne Thompson
 ;#
@@ -7,6 +7,7 @@
 ;#     This routine provides word completion.
 ;#     (TAB) attempts word completion.
 ;#     (^D)  prints completion list.
+;#      (These may be changed by setting $Complete'complete, etc.)
 ;#
 ;# Diagnostics:
 ;#     Bell when word completion fails.
@@ -15,69 +16,95 @@
 ;#     The tty driver is put into raw mode.
 ;#
 ;# Bugs:
-;#     The erase and kill characters are hard coded.
 ;#
 ;# Usage:
-;#     $input = do Complete('prompt_string', @completion_list);
+;#     $input = &Complete('prompt_string', *completion_list);
+;#         or
+;#     $input = &Complete('prompt_string', @completion_list);
 ;#
 
+CONFIG: {
+    package Complete;
+
+    $complete = "\004";
+    $kill     = "\025";
+    $erase1 =   "\177";
+    $erase2 =   "\010";
+}
+
 sub Complete {
-    local ($prompt) = shift (@_);
-    local ($c, $cmp, $l, $r, $ret, $return, $test);
-    @_ = sort @_;
-    system 'stty raw -echo';
-    loop: {
-       print $prompt, $return;
-       while (($c = getc(stdin)) ne "\r") {
-           if ($c eq "\t") {                   # (TAB) attempt completion
-               @_match = ();
-               foreach $cmp (@_) {
-                   push (@_match, $cmp) if $cmp =~ /^$return/;
-               }
-               $test = $_match[0];
-               $l = length ($test);
-               unless ($#_match == 0) {
-                   shift (@_match);
-                   foreach $cmp (@_match) {
-                       until (substr ($cmp, 0, $l) eq substr ($test, 0, $l)) {
-                           $l--;
-                       }
-                   }
-                   print "\007";
-               }
-               print $test = substr ($test, $r, $l - $r);
-               $r = length ($return .= $test);
-           }
-           elsif ($c eq "\004") {              # (^D) completion list
-               print "\r\n";
-               foreach $cmp (@_) {
-                   print "$cmp\r\n" if $cmp =~ /^$return/;
-               }
-               redo loop;
-           }
-           elsif ($c eq "\025" && $r) {        # (^U) kill
-               $return = '';
-               $r = 0;
-               print "\r\n";
-               redo loop;
-           }
-                                               # (DEL) || (BS) erase
-           elsif ($c eq "\177" || $c eq "\010") {
-               if($r) {
-                   print "\b \b";
-                   chop ($return);
-                   $r--;
-               }
-           }
-           elsif ($c =~ /\S/) {                # printable char
-               $return .= $c;
-               $r++;
-               print $c;
-           }
-       }
+    package Complete;
+
+    local($prompt, @cmp_list, $return, @match, $l, $test, $cmp, $r);
+    if ($_[1] =~ /^StB\0/) {
+        ($prompt, *_) = @_;
+    }
+    else {
+        $prompt = shift(@_);
+    }
+    @cmp_lst = sort(@_);
+
+    system('stty raw -echo');
+    LOOP: {
+        print($prompt, $return);
+        while (($_ = getc(STDIN)) ne "\r") {
+            CASE: {
+                # (TAB) attempt completion
+                $_ eq "\t" && do {
+                    @match = grep(/^$return/, @cmp_lst);
+                    $l = length($test = shift(@match));
+                    unless ($#match < 0) {
+                        foreach $cmp (@match) {
+                            until (substr($cmp, 0, $l) eq substr($test, 0, $l)) {
+                                $l--;
+                            }
+                        }
+                        print("\a");
+                    }
+                    print($test = substr($test, $r, $l - $r));
+                    $r = length($return .= $test);
+                    last CASE;
+                };
+
+                # (^D) completion list
+                $_ eq $complete && do {
+                    print(join("\r\n", '', grep(/^$return/, @cmp_lst)), "\r\n");
+                    redo LOOP;
+                };
+
+                # (^U) kill
+                $_ eq $kill && do {
+                    if ($r) {
+                        undef $r;
+                       undef $return;
+                        print("\r\n");
+                        redo LOOP;
+                    }
+                    last CASE;
+                };
+
+                # (DEL) || (BS) erase
+                ($_ eq $erase1 || $_ eq $erase2) && do {
+                    if($r) {
+                        print("\b \b");
+                        chop($return);
+                        $r--;
+                    }
+                    last CASE;
+                };
+
+                # printable char
+                ord >= 32 && do {
+                    $return .= $_;
+                    $r++;
+                    print;
+                    last CASE;
+                };
+            }
+        }
     }
-    system 'stty -raw echo';
-    print "\n";
+    system('stty -raw echo');
+    print("\n");
     $return;
 }