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|
$out = open("callback.c", "w")
$dl_h = ARGV[0] || "dl.h"
# import DLSTACK_SIZE, DLSTACK_ARGS and so on
File.open($dl_h){|f|
pre = ""
f.each{|line|
line.chop!
if( line[-1] == ?\\ )
line.chop!
line.concat(" ")
pre += line
next
end
if( pre.size > 0 )
line = pre + line
pre = ""
end
case line
when /#define\s+DLSTACK_SIZE\s+\(?(\d+)\)?/
DLSTACK_SIZE = $1.to_i
when /#define\s+DLSTACK_ARGS\s+(.+)/
DLSTACK_ARGS = $1.to_i
when /#define\s+DLTYPE_([A-Z_]+)\s+\(?(\d+)\)?/
eval("#{$1} = #{$2}")
when /#define\s+MAX_DLTYPE\s+\(?(\d+)\)?/
MAX_DLTYPE = $1.to_i
when /#define\s+MAX_CALLBACK\s+\(?(\d+)\)?/
MAX_CALLBACK = $1.to_i
end
}
}
CDECL = "cdecl"
STDCALL = "stdcall"
CALLTYPES = [CDECL, STDCALL]
DLTYPE = {
VOID => {
:name => 'void',
:type => 'void',
:conv => nil,
},
CHAR => {
:name => 'char',
:type => 'char',
:conv => 'NUM2CHR(%s)'
},
SHORT => {
:name => 'short',
:type => 'short',
:conv => 'NUM2INT(%s)',
},
INT => {
:name => 'int',
:type => 'int',
:conv => 'NUM2INT(%s)',
},
LONG => {
:name => 'long',
:type => 'long',
:conv => 'NUM2LONG(%s)',
},
LONG_LONG => {
:name => 'long_long',
:type => 'LONG_LONG',
:conv => 'NUM2LL(%s)',
},
FLOAT => {
:name => 'float',
:type => 'float',
:conv => 'RFLOAT_VALUE(%s)',
},
DOUBLE => {
:name => 'double',
:type => 'double',
:conv => 'RFLOAT_VALUE(%s)',
},
VOIDP => {
:name => 'ptr',
:type => 'void *',
:conv => 'NUM2PTR(%s)',
},
}
def func_name(ty, argc, n, calltype)
"rb_dl_callback_#{DLTYPE[ty][:name]}_#{argc}_#{n}_#{calltype}"
end
$out << (<<EOS)
#include "ruby.h"
VALUE rb_DLCdeclCallbackAddrs, rb_DLCdeclCallbackProcs;
#ifdef FUNC_STDCALL
VALUE rb_DLStdcallCallbackAddrs, rb_DLStdcallCallbackProcs;
#endif
/*static void *cdecl_callbacks[MAX_DLTYPE][MAX_CALLBACK];*/
#ifdef FUNC_STDCALL
/*static void *stdcall_callbacks[MAX_DLTYPE][MAX_CALLBACK];*/
#endif
ID rb_dl_cb_call;
EOS
def foreach_proc_entry
for calltype in CALLTYPES
case calltype
when CDECL
proc_entry = "rb_DLCdeclCallbackProcs"
when STDCALL
proc_entry = "rb_DLStdcallCallbackProcs"
else
raise "unknown calltype: #{calltype}"
end
yield calltype, proc_entry
end
end
def gencallback(ty, calltype, proc_entry, argc, n)
<<-EOS
#{calltype == STDCALL ? "\n#ifdef FUNC_STDCALL" : ""}
static #{DLTYPE[ty][:type]}
FUNC_#{calltype.upcase}(#{func_name(ty,argc,n,calltype)})(#{(0...argc).collect{|i| "DLSTACK_TYPE stack" + i.to_s}.join(", ")})
{
VALUE ret, cb#{argc > 0 ? ", args[#{argc}]" : ""};
#{
(0...argc).collect{|i|
" args[%d] = LONG2NUM(stack%d);" % [i,i]
}.join("\n")
}
cb = rb_ary_entry(rb_ary_entry(#{proc_entry}, #{ty}), #{(n * DLSTACK_SIZE) + argc});
ret = rb_funcall2(cb, rb_dl_cb_call, #{argc}, #{argc > 0 ? 'args' : 'NULL'});
return #{DLTYPE[ty][:conv] ? DLTYPE[ty][:conv] % "ret" : ""};
}
#{calltype == STDCALL ? "#endif\n" : ""}
EOS
end
def gen_push_proc_ary(ty, aryname)
sprintf(" rb_ary_push(#{aryname}, rb_ary_new3(%d,%s));",
MAX_CALLBACK * DLSTACK_SIZE,
(0...MAX_CALLBACK).collect{
(0...DLSTACK_SIZE).collect{ "Qnil" }.join(",")
}.join(","))
end
def gen_push_addr_ary(ty, aryname, calltype)
sprintf(" rb_ary_push(#{aryname}, rb_ary_new3(%d,%s));",
MAX_CALLBACK * DLSTACK_SIZE,
(0...MAX_CALLBACK).collect{|i|
(0...DLSTACK_SIZE).collect{|argc|
"PTR2NUM(%s)" % func_name(ty,argc,i,calltype)
}.join(",")
}.join(","))
end
def gen_callback_file(ty)
filename = "callback-#{ty}.c"
initname = "rb_dl_init_callbacks_#{ty}"
open(filename, "w") {|f|
f.puts <<-EOS
#include "dl.h"
extern VALUE rb_DLCdeclCallbackAddrs, rb_DLCdeclCallbackProcs;
#ifdef FUNC_STDCALL
extern VALUE rb_DLStdcallCallbackAddrs, rb_DLStdcallCallbackProcs;
#endif
extern ID rb_dl_cb_call;
EOS
yield f
f.puts <<-EOS
void
#{initname}()
{
#{gen_push_proc_ary(ty, "rb_DLCdeclCallbackProcs")}
#{gen_push_addr_ary(ty, "rb_DLCdeclCallbackAddrs", CDECL)}
#ifdef FUNC_STDCALL
#{gen_push_proc_ary(ty, "rb_DLStdcallCallbackProcs")}
#{gen_push_addr_ary(ty, "rb_DLStdcallCallbackAddrs", STDCALL)}
#endif
}
EOS
}
initname
end
for ty in 0...MAX_DLTYPE
initname = gen_callback_file(ty) {|f|
foreach_proc_entry do |calltype, proc_entry|
for argc in 0...DLSTACK_SIZE
for n in 0...MAX_CALLBACK
f << gencallback(ty, calltype, proc_entry, argc, n)
end
end
end
}
$out << "void #{initname}();\n"
end
$out << (<<EOS)
void
Init_callback(void)
{
VALUE tmp;
VALUE rb_mDL = rb_path2class("DL");
rb_dl_cb_call = rb_intern("call");
tmp = rb_DLCdeclCallbackProcs = rb_ary_new();
rb_define_const(rb_mDL, "CdeclCallbackProcs", tmp);
tmp = rb_DLCdeclCallbackAddrs = rb_ary_new();
rb_define_const(rb_mDL, "CdeclCallbackAddrs", tmp);
#ifdef FUNC_STDCALL
tmp = rb_DLStdcallCallbackProcs = rb_ary_new();
rb_define_const(rb_mDL, "StdcallCallbackProcs", tmp);
tmp = rb_DLStdcallCallbackAddrs = rb_ary_new();
rb_define_const(rb_mDL, "StdcallCallbackAddrs", tmp);
#endif
#{
(0...MAX_DLTYPE).collect{|ty|
" rb_dl_init_callbacks_#{ty}();"
}.join("\n")
}
}
EOS
|