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#!/usr/bin/python
import sys
import re
import libxltypes
def format_comment(level, comment):
indent = reduce(lambda x,y: x + " ", range(level), "")
s = "%s/*\n" % indent
s += "%s * " % indent
comment = comment.replace("\n", "\n%s * " % indent)
x = re.compile(r'^%s \* $' % indent, re.MULTILINE)
comment = x.sub("%s *" % indent, comment)
s += comment
s += "\n"
s += "%s */" % indent
s += "\n"
return s
def libxl_C_type_of(ty):
return ty.typename
def libxl_C_instance_of(ty, instancename):
if isinstance(ty, libxltypes.BitField):
return libxl_C_type_of(ty) + " " + instancename + ":%d" % ty.width
elif isinstance(ty, libxltypes.Aggregate) and ty.typename is None:
if instancename is None:
return libxl_C_type_define(ty)
else:
return libxl_C_type_define(ty) + " " + instancename
else:
return libxl_C_type_of(ty) + " " + instancename
def libxl_C_type_define(ty, indent = ""):
s = ""
if isinstance(ty, libxltypes.Aggregate):
if ty.comment is not None:
s += format_comment(0, ty.comment)
if ty.typename is None:
s += "%s {\n" % ty.kind
else:
s += "typedef %s {\n" % ty.kind
for f in ty.fields:
if f.comment is not None:
s += format_comment(4, f.comment)
x = libxl_C_instance_of(f.type, f.name)
if f.const:
x = "const " + x
x = x.replace("\n", "\n ")
s += " " + x + ";\n"
if ty.typename is None:
s += "}"
else:
s += "} %s" % ty.typename
else:
raise NotImplementedError("%s" % type(ty))
return s.replace("\n", "\n%s" % indent)
def libxl_C_type_destroy(ty, v, reference, indent = " ", parent = None):
if reference:
deref = v + "->"
else:
deref = v + "."
if ty.passby == libxltypes.PASS_BY_REFERENCE and not reference:
makeref = "&"
else:
makeref = ""
s = ""
if isinstance(ty, libxltypes.KeyedUnion):
if parent is None:
raise Exception("KeyedUnion type must have a parent")
for f in ty.fields:
keyvar_expr = f.keyvar_expr % (parent + ty.keyvar_name)
s += "if (" + keyvar_expr + ") {\n"
s += libxl_C_type_destroy(f.type, deref + f.name, False, indent + " ", deref)
s += "}\n"
elif isinstance(ty, libxltypes.Reference):
s += libxl_C_type_destroy(ty.ref_type, v, True, indent, v)
if ty.destructor_fn is not None:
s += "%s(%s);\n" % (ty.destructor_fn, makeref + v)
elif isinstance(ty, libxltypes.Struct) and (parent is None or ty.destructor_fn is None):
for f in [f for f in ty.fields if not f.const]:
if f.name is None: # Anonynous struct
s += libxl_C_type_destroy(f.type, deref, False, "", deref)
else:
s += libxl_C_type_destroy(f.type, deref + f.name, False, "", deref)
else:
if ty.destructor_fn is not None:
s += "%s(%s);\n" % (ty.destructor_fn, makeref + v)
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
if __name__ == '__main__':
if len(sys.argv) < 4:
print >>sys.stderr, "Usage: gentypes.py <idl> <header> <implementation>"
sys.exit(1)
idl = sys.argv[1]
(_,types) = libxltypes.parse(idl)
header = sys.argv[2]
print "outputting libxl type definitions to %s" % header
f = open(header, "w")
f.write("""#ifndef __LIBXL_TYPES_H
#define __LIBXL_TYPES_H
/*
* DO NOT EDIT.
*
* This file is autogenerated by
* "%s"
*/
""" % " ".join(sys.argv))
for ty in types:
f.write(libxl_C_type_define(ty) + ";\n")
if ty.destructor_fn is not None:
f.write("void %s(%s *p);\n" % (ty.destructor_fn, ty.typename))
f.write("\n")
f.write("""#endif /* __LIBXL_TYPES_H */\n""")
f.close()
impl = sys.argv[3]
print "outputting libxl type implementations to %s" % impl
f = open(impl, "w")
f.write("""
/* DO NOT EDIT.
*
* This file is autogenerated by
* "%s"
*/
#include "libxl_osdeps.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "libxl.h"
#define LIBXL_DTOR_POISON 0xa5
""" % " ".join(sys.argv))
for ty in [t for t in types if t.destructor_fn is not None and t.autogenerate_destructor]:
f.write("void %s(%s *p)\n" % (ty.destructor_fn, ty.typename))
f.write("{\n")
f.write(libxl_C_type_destroy(ty, "p", True))
f.write(" memset(p, LIBXL_DTOR_POISON, sizeof(*p));\n")
f.write("}\n")
f.write("\n")
f.close()
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