From 2b291d3806d85d6a87963dfcc88750e89e147b2c Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 8 Oct 2005 10:15:50 +0000
Subject: * ext/iconv/charset_alias.rb: parse config.charset_alias file
 directly.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9357 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog                  |  4 +++-
 ext/iconv/charset_alias.rb | 46 ++++++++++++++++++++++++++++++++++++----------
 ext/iconv/extconf.rb       |  4 ++--
 3 files changed, 41 insertions(+), 13 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index c3fc242b88..b1eaaa8c33 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,4 @@
-Sat Oct  8 18:57:52 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Sat Oct  8 19:15:02 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* parse.y (rb_parser_malloc, rb_parser_free): manage parser stack on
 	  heap.  [ruby-list:41199]
@@ -7,6 +7,8 @@ Sat Oct  8 18:57:52 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/ripper/depend (check): get rid of re-generating ripper.y always.
 
+	* ext/iconv/charset_alias.rb: parse config.charset_alias file directly.
+
 Thu Oct  6 20:10:38 2005  Minero Aoki  <aamine@loveruby.net>
 
 	* ext/strscan/strscan.c (strscan_free): remove useless code.
diff --git a/ext/iconv/charset_alias.rb b/ext/iconv/charset_alias.rb
index f1563b0dff..f3a54b8ddc 100644
--- a/ext/iconv/charset_alias.rb
+++ b/ext/iconv/charset_alias.rb
@@ -1,10 +1,11 @@
 #! /usr/bin/ruby
 require 'rbconfig'
+require 'optparse'
 
 # http://www.ctan.org/tex-archive/macros/texinfo/texinfo/intl/config.charset
 # Fri, 30 May 2003 00:09:00 GMT'
 
-OS = Config::CONFIG["target"]
+OS = Config::CONFIG["target_os"]
 SHELL = Config::CONFIG['SHELL']
 
 class Hash::Ordered < Hash
@@ -26,12 +27,26 @@ end
 def charset_alias(config_charset, mapfile, target = OS)
   map = Hash::Ordered.new
   comments = []
-  IO.foreach("|#{SHELL} #{config_charset} #{target}") do |list|
-    next comments << list if /^\#/ =~ list
-    next unless /^(\S+)\s+(\S+)$/ =~ list
-    sys, can = $1, $2
-    can.downcase!
-    map[can] = sys
+  match = false
+  open(config_charset) do |input|
+    input.find {|line| /^case "\$os" in/ =~ line} or return
+    input.find {|line|
+      /^\s*([-\w\*]+(?:\s*\|\s*[-\w\*]+)*)(?=\))/ =~ line and
+      $&.split('|').any? {|pattern| File.fnmatch?(pattern.strip, target)}
+    } or return
+    input.find do |line|
+      case line
+      when /^\s*echo "(?:\$\w+\.)?([-\w*]+)\s+([-\w]+)"/
+        sys, can = $1, $2
+        can.downcase!
+        map[can] = sys
+        false
+      when /^\s*;;/
+        true
+      else
+        false
+      end
+    end
   end
   case target
   when /linux|-gnu/
@@ -53,7 +68,7 @@ def charset_alias(config_charset, mapfile, target = OS)
   st.delete_if {|sys, i| i == 1}.empty?
   st.keys.each {|sys| st[sys] = nil}
   st.default = nil
-  open(mapfile, "w") do |f|
+  writer = proc do |f|
     f.puts("require 'iconv.so'")
     f.puts
     f.puts(comments)
@@ -71,7 +86,18 @@ def charset_alias(config_charset, mapfile, target = OS)
     end
     f.puts("end")
   end
+  if mapfile
+    open(mapfile, "w", &writer)
+  else
+    writer[STDOUT]
+  end
 end
 
-(2..3) === ARGV.size or abort "usage: #$0 config.status map.rb [target]"
-charset_alias(*ARGV)
+target = OS
+opt = nil
+ARGV.options do |opt|
+  opt.banner << " config.status map.rb"
+  opt.on("--target OS") {|t| target = t}
+  opt.parse! and (1..2) === ARGV.size
+end or abort opt.to_s
+charset_alias(ARGV[0], ARGV[1], target)
diff --git a/ext/iconv/extconf.rb b/ext/iconv/extconf.rb
index 1fe2d8a932..71221d60a1 100644
--- a/ext/iconv/extconf.rb
+++ b/ext/iconv/extconf.rb
@@ -33,7 +33,7 @@ if have_func("iconv", "iconv.h") or
       require 'uri'
       scheme = URI.parse(conf).scheme
     else
-      conf = prefix + "config.charset"
+      conf = "$(srcdir)/config.charset"
     end
     $cleanfiles << wrapper
   end
@@ -42,7 +42,7 @@ if have_func("iconv", "iconv.h") or
     open("Makefile", "a") do |mf|
       mf.print("\nall: #{wrapper}\n\n#{wrapper}: #{prefix}charset_alias.rb")
       mf.print(" ", conf) unless scheme
-      mf.print("\n\t$(RUBY) ", prefix, "charset_alias.rb ", conf, " $@\n")
+      mf.print("\n\t$(RUBY) $(srcdir)/charset_alias.rb #{conf} $@\n")
     end
   end
 end
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