link: Update documentation.

[gnulib.git] / build-aux / useless-if-before-free

diff --git a/build-aux/useless-if-before-free b/build-aux/useless-if-before-free
index 29d4917..6aa7d39 100755 (executable)
--- a/build-aux/useless-if-before-free
+++ b/build-aux/useless-if-before-free
@@ -1,16 +1,18 @@
-#!/usr/bin/perl -T
+eval '(exit $?0)' && eval 'exec perl -wST "$0" ${1+"$@"}'
+  & eval 'exec perl -wST "$0" $argv:q'
+    if 0;

 # Detect instances of "if (p) free (p);".
 # Likewise for "if (p != NULL) free (p);".  And with braces.
 # Also detect "if (NULL != p) free (p);".
 # And with 0 in place of NULL.
 
 # Detect instances of "if (p) free (p);".
 # Likewise for "if (p != NULL) free (p);".  And with braces.
 # Also detect "if (NULL != p) free (p);".
 # And with 0 in place of NULL.
 

-my $VERSION = '2009-04-07 08:05'; # UTC
+my $VERSION = '2009-04-16 15:57'; # UTC

 # The definition above must lie within the first 8 lines in order
 # for the Emacs time-stamp write hook (at end) to update it.
 # If you change this file with Emacs, please let the write hook
 # do its job.  Otherwise, update this string manually.
 
 # The definition above must lie within the first 8 lines in order
 # for the Emacs time-stamp write hook (at end) to update it.
 # If you change this file with Emacs, please let the write hook
 # do its job.  Otherwise, update this string manually.
 

-# Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2008-2010 Free Software Foundation, Inc.

 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by


@@ -175,9 +177,11 @@ my $foo = <<'EOF';
 # This adjusts them, removing the unnecessary "if (p)" part.
 
 # FIXME: do something like this as an option (doesn't do braces):
 # This adjusts them, removing the unnecessary "if (p)" part.
 
 # FIXME: do something like this as an option (doesn't do braces):

-useless-if-before-free -l $(lid -knone free) | xargs -0 \
-  perl -0x3b -pi -e \
-   's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*NULL)?\s*\)\s+(free\s*\((?:\s*\([^)]+\))?\s*\1\s*\))/$2/s'
+free=xfree
+git grep -l -z "$free *(" \
+  | xargs -0 useless-if-before-free -l --name="$free" \
+  | xargs -0 perl -0x3b -pi -e \
+   's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*(?:0|NULL))?\s*\)\s+('"$free"'\s*\((?:\s*\([^)]+\))?\s*\1\s*\))/$2/s'

 
 # Use the following to remove redundant uses of kfree inside braces.
 # Note that -0777 puts perl in slurp-whole-file mode;
 
 # Use the following to remove redundant uses of kfree inside braces.
 # Note that -0777 puts perl in slurp-whole-file mode;


@@ -186,7 +190,7 @@ free=kfree
 git grep -l -z "$free *(" \
   | xargs -0 useless-if-before-free -l --name="$free" \
   | xargs -0 perl -0777 -pi -e \
 git grep -l -z "$free *(" \
   | xargs -0 useless-if-before-free -l --name="$free" \
   | xargs -0 perl -0777 -pi -e \

-     's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*NULL)?\s*\)\s*\{\s*('"$free"'\s*\((?:\s*\([^)]+\))?\s*\1\s*\);)\s*\}[^\n]*$/$2/gms'
+     's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*(?:0|NULL))?\s*\)\s*\{\s*('"$free"'\s*\((?:\s*\([^)]+\))?\s*\1\s*\);)\s*\}[^\n]*$/$2/gms'

 
 Be careful that the result of the above transformation is valid.
 If the matched string is followed by "else", then obviously, it won't be.
 
 Be careful that the result of the above transformation is valid.
 If the matched string is followed by "else", then obviously, it won't be.


@@ -195,6 +199,7 @@ When modifying files, refuse to process anything other than a regular file.
 EOF
 
 ## Local Variables:
 EOF
 
 ## Local Variables:

+## mode: perl

 ## indent-tabs-mode: nil
 ## eval: (add-hook 'write-file-hooks 'time-stamp)
 ## time-stamp-start: "my $VERSION = '"
 ## indent-tabs-mode: nil
 ## eval: (add-hook 'write-file-hooks 'time-stamp)
 ## time-stamp-start: "my $VERSION = '"