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# This file is interpreted by $(BASERUBY) and miniruby.
# $(BASERUBY) is used for miniprelude.c.
# miniruby is used for prelude.c.
# Since $(BASERUBY) may be older than Ruby 1.9,
# Ruby 1.9 feature should not be used.
$:.unshift(File.expand_path("../..", __FILE__))
preludes = ARGV.dup
outfile = preludes.pop
init_name = outfile[/\w+(?=_prelude.c\z)/] || 'prelude'
C_ESC = {
"\\" => "\\\\",
'"' => '\"',
"\n" => '\n',
}
0x00.upto(0x1f) {|ch| C_ESC[[ch].pack("C")] ||= "\\x%02x" % ch }
0x7f.upto(0xff) {|ch| C_ESC[[ch].pack("C")] = "\\x%02x" % ch }
C_ESC_PAT = Regexp.union(*C_ESC.keys)
def c_esc(str)
'"' + str.gsub(C_ESC_PAT) { C_ESC[$&] } + '"'
end
mkconf = nil
setup_ruby_prefix = nil
teardown_ruby_prefix = nil
lines_list = preludes.map {|filename|
lines = []
need_ruby_prefix = false
File.readlines(filename).each {|line|
line.gsub!(/RbConfig::CONFIG\["(\w+)"\]/) {
key = $1
unless mkconf
require 'rbconfig'
mkconf = RbConfig::MAKEFILE_CONFIG.merge('prefix'=>'#{TMP_RUBY_PREFIX}')
setup_ruby_prefix = "TMP_RUBY_PREFIX = $:.reverse.find{|e|e!=\".\"}.sub(%r{(.*)/lib/.*}m, \"\\\\1\")\n"
teardown_ruby_prefix = 'Object.class_eval { remove_const "TMP_RUBY_PREFIX" }'
end
if RbConfig::MAKEFILE_CONFIG.has_key? key
val = RbConfig.expand("$(#{key})", mkconf)
need_ruby_prefix = true if /\A\#\{TMP_RUBY_PREFIX\}/ =~ val
c_esc(val)
else
"nil"
end
}
lines << c_esc(line)
}
setup_lines = []
if need_ruby_prefix
setup_lines << c_esc(setup_ruby_prefix)
lines << c_esc(teardown_ruby_prefix)
end
[setup_lines, lines]
}
require 'erb'
tmp = ERB.new(<<'EOS', nil, '%').result(binding)
#include "ruby/ruby.h"
#include "vm_core.h"
% preludes.zip(lines_list).each_with_index {|(prelude, (setup_lines, lines)), i|
static const char prelude_name<%=i%>[] = <%=c_esc(File.basename(prelude))%>;
static const char prelude_code<%=i%>[] =
% (setup_lines+lines).each {|line|
<%=line%>
% }
;
% }
void
Init_<%=init_name%>(void)
{
% lines_list.each_with_index {|(setup_lines, lines), i|
rb_iseq_eval(rb_iseq_compile(
rb_str_new(prelude_code<%=i%>, sizeof(prelude_code<%=i%>) - 1),
rb_str_new(prelude_name<%=i%>, sizeof(prelude_name<%=i%>) - 1),
INT2FIX(<%=1-setup_lines.length%>)));
% }
#if 0
% preludes.length.times {|i|
puts(prelude_code<%=i%>);
% }
#endif
}
EOS
open(outfile, 'w'){|f|
f << tmp
}
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