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#!/usr/bin/python
import sys
import re
import idl
def libxl_C_instance_of(ty, instancename):
if isinstance(ty, idl.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 ty.typename + " " + instancename
def libxl_C_type_define(ty, indent = ""):
s = ""
if isinstance(ty, idl.Enumeration):
if ty.typename is None:
s += "enum {\n"
else:
s += "typedef enum %s {\n" % ty.typename
for v in ty.values:
x = "%s = %d" % (v.name, v.value)
x = x.replace("\n", "\n ")
s += " " + x + ",\n"
if ty.typename is None:
s += "}"
else:
s += "} %s" % ty.typename
elif isinstance(ty, idl.Aggregate):
if ty.typename is None:
s += "%s {\n" % ty.kind
else:
s += "typedef %s %s {\n" % (ty.kind, ty.typename)
for f in ty.fields:
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_dispose(ty, v, indent = " ", parent = None):
s = ""
if isinstance(ty, idl.KeyedUnion):
if parent is None:
raise Exception("KeyedUnion type must have a parent")
s += "switch (%s) {\n" % (parent + ty.keyvar_name)
for f in ty.fields:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += "case %s:\n" % f.enumname
s += libxl_C_type_dispose(f.type, fexpr, indent + " ", nparent)
s += " break;\n"
s += "}\n"
elif isinstance(ty, idl.Struct) and (parent is None or ty.dispose_fn is None):
for f in [f for f in ty.fields if not f.const]:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += libxl_C_type_dispose(f.type, fexpr, "", nparent)
else:
if ty.dispose_fn is not None:
s += "%s(%s);\n" % (ty.dispose_fn, ty.pass_arg(v, parent is None))
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_type_gen_json(ty, v, indent = " ", parent = None):
s = ""
if parent is None:
s += "yajl_gen_status s;\n"
if isinstance(ty, idl.Enumeration):
s += "s = libxl__yajl_gen_enum(hand, %s_to_string(%s));\n" % (ty.typename, ty.pass_arg(v, parent is None))
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
elif isinstance(ty, idl.KeyedUnion):
if parent is None:
raise Exception("KeyedUnion type must have a parent")
s += "switch (%s) {\n" % (parent + ty.keyvar_name)
for f in ty.fields:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += "case %s:\n" % f.enumname
s += libxl_C_type_gen_json(f.type, fexpr, indent + " ", nparent)
s += " break;\n"
s += "}\n"
elif isinstance(ty, idl.Struct) and (parent is None or ty.json_fn is None):
s += "s = yajl_gen_map_open(hand);\n"
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
for f in [f for f in ty.fields if not f.const]:
(nparent,fexpr) = ty.member(v, f, parent is None)
s += "s = yajl_gen_string(hand, (const unsigned char *)\"%s\", sizeof(\"%s\")-1);\n" % (f.name, f.name)
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
s += libxl_C_type_gen_json(f.type, fexpr, "", nparent)
s += "s = yajl_gen_map_close(hand);\n"
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
else:
if ty.json_fn is not None:
s += "s = %s(hand, %s);\n" % (ty.json_fn, ty.pass_arg(v, parent is None))
s += "if (s != yajl_gen_status_ok)\n"
s += " goto out;\n"
if parent is None:
s += "out:\n"
s += "return s;\n"
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_type_to_json(ty, v, indent = " "):
s = ""
gen = "(libxl__gen_json_callback)&%s_gen_json" % ty.typename
s += "return libxl__object_to_json(ctx, \"%s\", %s, (void *)%s);\n" % (ty.typename, gen, ty.pass_arg(v, passby=idl.PASS_BY_REFERENCE))
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_enum_to_string(ty, e, indent = " "):
s = ""
s += "switch(%s) {\n" % e
for v in ty.values:
s += " case %s:\n" % (v.name)
s += " return \"%s\";\n" % (v.valuename.lower())
s += " default:\n "
s += " return NULL;\n"
s += "}\n"
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_enum_strings(ty, indent=""):
s = ""
s += "libxl_enum_string_table %s_string_table[] = {\n" % (ty.typename)
for v in ty.values:
s += " { .s = \"%s\", .v = %s },\n" % (v.valuename.lower(), v.name)
s += " { NULL, -1 },\n"
s += "};\n"
s += "\n"
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
def libxl_C_enum_from_string(ty, str, e, indent = " "):
s = ""
s += "return libxl__enum_from_string(%s_string_table,\n" % ty.typename
s += " %s, (int *)%s);\n" % (str, e)
if s != "":
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
if __name__ == '__main__':
if len(sys.argv) != 5:
print >>sys.stderr, "Usage: gentypes.py <idl> <header> <header-json> <implementation>"
sys.exit(1)
(_, idlname, header, header_json, impl) = sys.argv
(builtins,types) = idl.parse(idlname)
print "outputting libxl type definitions to %s" % header
f = open(header, "w")
header_define = header.upper().replace('.','_')
f.write("""#ifndef %s
#define %s
/*
* DO NOT EDIT.
*
* This file is autogenerated by
* "%s"
*/
""" % (header_define, header_define, " ".join(sys.argv)))
for ty in types:
f.write(libxl_C_type_define(ty) + ";\n")
if ty.dispose_fn is not None:
f.write("void %s(%s);\n" % (ty.dispose_fn, ty.make_arg("p")))
if ty.json_fn is not None:
f.write("char *%s_to_json(libxl_ctx *ctx, %s);\n" % (ty.typename, ty.make_arg("p")))
if isinstance(ty, idl.Enumeration):
f.write("const char *%s_to_string(%s);\n" % (ty.typename, ty.make_arg("p")))
f.write("int %s_from_string(const char *s, %s);\n" % (ty.typename, ty.make_arg("e", passby=idl.PASS_BY_REFERENCE)))
f.write("extern libxl_enum_string_table %s_string_table[];\n" % (ty.typename))
f.write("\n")
f.write("""#endif /* %s */\n""" % (header_define))
f.close()
print "outputting libxl JSON definitions to %s" % header_json
f = open(header_json, "w")
header_json_define = header_json.upper().replace('.','_')
f.write("""#ifndef %s
#define %s
/*
* DO NOT EDIT.
*
* This file is autogenerated by
* "%s"
*/
""" % (header_json_define, header_json_define, " ".join(sys.argv)))
for ty in [ty for ty in types+builtins if ty.json_fn is not None]:
f.write("yajl_gen_status %s_gen_json(yajl_gen hand, %s);\n" % (ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
f.write("\n")
f.write("""#endif /* %s */\n""" % header_json_define)
f.close()
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"
#include "libxl_internal.h"
#define LIBXL_DTOR_POISON 0xa5
""" % " ".join(sys.argv))
for ty in [t for t in types if t.dispose_fn is not None and t.autogenerate_dispose_fn]:
f.write("void %s(%s)\n" % (ty.dispose_fn, ty.make_arg("p")))
f.write("{\n")
f.write(libxl_C_type_dispose(ty, "p"))
f.write(" memset(p, LIBXL_DTOR_POISON, sizeof(*p));\n")
f.write("}\n")
f.write("\n")
for ty in [t for t in types if isinstance(t,idl.Enumeration)]:
f.write("const char *%s_to_string(%s e)\n" % (ty.typename, ty.typename))
f.write("{\n")
f.write(libxl_C_enum_to_string(ty, "e"))
f.write("}\n")
f.write("\n")
f.write(libxl_C_enum_strings(ty))
f.write("int %s_from_string(const char *s, %s *e)\n" % (ty.typename, ty.typename))
f.write("{\n")
f.write(libxl_C_enum_from_string(ty, "s", "e"))
f.write("}\n")
f.write("\n")
for ty in [t for t in types if t.json_fn is not None]:
f.write("yajl_gen_status %s_gen_json(yajl_gen hand, %s)\n" % (ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
f.write("{\n")
f.write(libxl_C_type_gen_json(ty, "p"))
f.write("}\n")
f.write("\n")
f.write("char *%s_to_json(libxl_ctx *ctx, %s)\n" % (ty.typename, ty.make_arg("p")))
f.write("{\n")
f.write(libxl_C_type_to_json(ty, "p"))
f.write("}\n")
f.write("\n")
f.close()
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