Add ruby-dl

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2324 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/dl/type.rb

@@ -0,0 +1,115 @@
+# example:
+#  DLTYPE[INT][:rb2c]["arg0"] => "NUM2INT(arg0)"
+#  DLTYPE[DOUBLE][:c2rb]["r"] => "rb_float_new(r)"
+
+DLTYPE = {
+  VOID  = 0x00 => {
+    :name => 'VOID',
+    :rb2c => nil,
+    :c2rb => nil,
+    :ctype => "void",
+    :stmem => "v",
+    :sym => true,
+    :cb => true,
+  },
+  CHAR  = 0x01 => {
+    :name => 'CHAR',
+    :rb2c => proc{|x| "NUM2CHR(#{x})"},
+    :c2rb => proc{|x| "CHR2FIX(#{x})"},
+    :ctype => "char",
+    :stmem => "c",
+    :sym => false,
+    :cb => false,
+  },
+  SHORT = 0x02 => {
+    :name => 'SHORT',
+    :rb2c => proc{|x| "FIX2INT(#{x})"},
+    :c2rb => proc{|x| "INT2FIX(#{x})"},
+    :ctype => "short",
+    :stmem => "h",
+    :sym => false,
+    :cb => false,
+  },
+  INT   = 0x03 => {
+    :name => 'INT',
+    :rb2c => proc{|x| "NUM2INT(#{x})"},
+    :c2rb => proc{|x| "INT2NUM(#{x})"},
+    :ctype => "int",
+    :stmem => "i",
+    :sym => true,
+    :cb => false,
+  },
+  LONG  = 0x04 => {
+    :name => 'LONG',
+    :rb2c => proc{|x| "NUM2INT(#{x})"},
+    :c2rb => proc{|x| "INT2NUM(#{x})"},
+    :ctype => "long",
+    :stmem => "l",
+    :sym => true,
+    :cb => true,
+  },
+  FLOAT = 0x05 => {
+    :name => 'FLOAT',
+    :rb2c => proc{|x| "(float)(RFLOAT(#{x})->value)"},
+    :c2rb => proc{|x| "rb_float_new((double)#{x})"},
+    :ctype => "float",
+    :stmem => "f",
+    :sym => false,
+    :cb => false,
+  },
+  DOUBLE = 0x06 => {
+    :name => 'DOUBLE',
+    :rb2c => proc{|x| "RFLOAT(#{x})->value"},
+    :c2rb => proc{|x| "rb_float_new(#{x})"},
+    :ctype => "double",
+    :stmem => "d",
+    :sym => true,
+    :cb => true,
+  },
+  VOIDP = 0x07 => {
+    :name => 'VOIDP',
+    :rb2c => proc{|x| "rb_dlptr2cptr(#{x})"},
+    :c2rb => proc{|x| "rb_dlptr_new(#{x},sizeof(void*),0)"},
+    :ctype => "void *",
+    :stmem => "p",
+    :sym => true,
+    :cb => true,
+  },
+}
+
+def tpush(t, x)
+  (t << 3)|x
+end
+
+def tget(t, i)
+  (t & (0x07 << (i * 3))) >> (i * 3)
+end
+
+def types2num(types)
+  res = 0x00
+  r = types.reverse
+  r.each{|t|
+    res = tpush(res,t)
+  }
+  res
+end
+
+def num2types(num)
+  ts = []
+  i  = 0
+  t = tget(num,i)
+  while( (t != VOID && i > 0) || (i == 0) )
+    ts.push(DLTYPE[t][:ctype])
+    i += 1
+    t = tget(num,i)
+  end
+  ts
+end
+
+def types2ctypes(types)
+  res = []
+  types.each{|t|
+    res.push(DLTYPE[t][:ctype])
+  }
+  res
+end