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+#!/usr/bin/perl
+#***************************************************************************
+# _ _ ____ _
+# Project ___| | | | _ \| |
+# / __| | | | |_) | |
+# | (__| |_| | _ <| |___
+# \___|\___/|_| \_\_____|
+#
+# Copyright (C) 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at http://curl.haxx.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+###########################################################################
+#
+# Experience has shown that the symbols-in-versions file is very useful to
+# applications that want to build with a wide range of libcurl versions.
+# It is however easy to get it wrong and the source gets a bit messy with all
+# the fixed numerical comparisions.
+#
+# The point of this script is to provide an easy-to-use macro for libcurl-
+# using applications to do preprocessor checks for specific libcurl defines,
+# and yet make the code clearly show what the macro is used for.
+#
+# Run this script and generate libcurl-symbols.h and then use that header in
+# a fashion similar to:
+#
+# #include "libcurl-symbols.h"
+#
+# #if LIBCURL_HAS(CURLOPT_MUTE)
+# has mute
+# #else
+# no mute
+# #endif
+#
+#
+open F, "<symbols-in-versions";
+
+sub str2num {
+ my ($str)=@_;
+ if($str =~ /([0-9]*)\.([0-9]*)\.*([0-9]*)/) {
+ return sprintf("0x%06x", $1<<16 | $2 << 8 | $3);
+ }
+}
+
+print <<EOS
+
+#include <curl/curl.h>
+
+#define LIBCURL_HAS(x) \\
+ (defined(x ## _FIRST) && (x ## _FIRST <= LIBCURL_VERSION_NUM) && \\
+ (!defined(x ## _LAST) || ( x ## _LAST >= LIBCURL_VERSION_NUM)))
+
+EOS
+ ;
+
+while(<F>) {
+ if(/^(CURL[^ ]*)[ \t]*(.*)/) {
+ my ($sym, $vers)=($1, $2);
+
+ my $intr;
+ my $rm;
+ my $dep;
+
+ # is there removed info?
+ if($vers =~ /([\d.]+)[ \t-]+([\d.]+)[ \t]+([\d.]+)/) {
+ ($intr, $dep, $rm)=($1, $2, $3);
+ }
+ # is it a dep-only line?
+ elsif($vers =~ /([\d.]+)[ \t-]+([\d.]+)/) {
+ ($intr, $dep)=($1, $2);
+ }
+ else {
+ $intr = $vers;
+ }
+
+ my $inum = str2num($intr);
+
+ print <<EOS
+#define ${sym}_FIRST $inum /* Added in $intr */
+EOS
+;
+ my $irm = str2num($rm);
+ if($rm) {
+ print <<EOS
+#define ${sym}_LAST $irm /* Last featured in $rm */
+EOS
+;
+ }
+
+ }
+}