зеркало из https://github.com/mozilla/gecko-dev.git
549 строки
18 KiB
Python
549 строки
18 KiB
Python
#!/usr/bin/env python
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# header.py - Generate C++ header files from IDL.
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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"""Print a C++ header file for the IDL files specified on the command line"""
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import sys, os.path, re, xpidl, itertools, glob
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printdoccomments = False
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if printdoccomments:
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def printComments(fd, clist, indent):
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for c in clist:
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fd.write("%s%s\n" % (indent, c))
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else:
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def printComments(fd, clist, indent):
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pass
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def firstCap(str):
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return str[0].upper() + str[1:]
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def attributeParamName(a):
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return "a" + firstCap(a.name)
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def attributeParamNames(a):
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l = [attributeParamName(a)]
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if a.implicit_jscontext:
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l.insert(0, "cx")
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return ", ".join(l)
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def attributeNativeName(a, getter):
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binaryname = a.binaryname is not None and a.binaryname or firstCap(a.name)
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return "%s%s" % (getter and 'Get' or 'Set', binaryname)
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def attributeReturnType(a, macro):
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"""macro should be NS_IMETHOD or NS_IMETHODIMP"""
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if (a.nostdcall):
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return macro == "NS_IMETHOD" and "virtual nsresult" or "nsresult"
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else:
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return macro
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def attributeParamlist(a, getter):
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l = ["%s%s" % (a.realtype.nativeType(getter and 'out' or 'in'),
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attributeParamName(a))]
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if a.implicit_jscontext:
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l.insert(0, "JSContext* cx")
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return ", ".join(l)
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def attributeAsNative(a, getter):
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deprecated = a.deprecated and "NS_DEPRECATED " or ""
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params = {'deprecated': deprecated,
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'returntype': attributeReturnType(a, 'NS_IMETHOD'),
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'binaryname': attributeNativeName(a, getter),
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'paramlist': attributeParamlist(a, getter)}
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return "%(deprecated)s%(returntype)s %(binaryname)s(%(paramlist)s)" % params
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def methodNativeName(m):
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return m.binaryname is not None and m.binaryname or firstCap(m.name)
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def methodReturnType(m, macro):
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"""macro should be NS_IMETHOD or NS_IMETHODIMP"""
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if m.nostdcall and m.notxpcom:
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return "%s%s" % (macro == "NS_IMETHOD" and "virtual " or "",
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m.realtype.nativeType('in').strip())
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elif m.nostdcall:
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return "%snsresult" % (macro == "NS_IMETHOD" and "virtual " or "")
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elif m.notxpcom:
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return "%s_(%s)" % (macro, m.realtype.nativeType('in').strip())
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else:
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return macro
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def methodAsNative(m):
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return "%s %s(%s)" % (methodReturnType(m, 'NS_IMETHOD'),
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methodNativeName(m),
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paramlistAsNative(m))
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def paramlistAsNative(m, empty='void'):
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l = [paramAsNative(p) for p in m.params]
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if m.implicit_jscontext:
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l.append("JSContext* cx")
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if m.optional_argc:
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l.append('uint8_t _argc')
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if not m.notxpcom and m.realtype.name != 'void':
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l.append(paramAsNative(xpidl.Param(paramtype='out',
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type=None,
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name='_retval',
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attlist=[],
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location=None,
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realtype=m.realtype)))
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if len(l) == 0:
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return empty
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return ", ".join(l)
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def paramAsNative(p):
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return "%s%s" % (p.nativeType(),
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p.name)
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def paramlistNames(m):
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names = [p.name for p in m.params]
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if m.implicit_jscontext:
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names.append('cx')
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if m.optional_argc:
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names.append('_argc')
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if not m.notxpcom and m.realtype.name != 'void':
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names.append('_retval')
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if len(names) == 0:
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return ''
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return ', '.join(names)
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header = """/*
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* DO NOT EDIT. THIS FILE IS GENERATED FROM %(filename)s
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*/
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#ifndef __gen_%(basename)s_h__
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#define __gen_%(basename)s_h__
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"""
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include = """
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#ifndef __gen_%(basename)s_h__
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#include "%(basename)s.h"
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#endif
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"""
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jsvalue_include = """
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#include "js/Value.h"
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"""
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infallible_includes = """
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#include "mozilla/Assertions.h"
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#include "mozilla/DebugOnly.h"
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"""
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header_end = """/* For IDL files that don't want to include root IDL files. */
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#ifndef NS_NO_VTABLE
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#define NS_NO_VTABLE
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#endif
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"""
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footer = """
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#endif /* __gen_%(basename)s_h__ */
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"""
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forward_decl = """class %(name)s; /* forward declaration */
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"""
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def idl_basename(f):
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"""returns the base name of a file with the last extension stripped"""
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return os.path.basename(f).rpartition('.')[0]
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def print_header(idl, fd, filename):
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fd.write(header % {'filename': filename,
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'basename': idl_basename(filename)})
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foundinc = False
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for inc in idl.includes():
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if not foundinc:
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foundinc = True
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fd.write('\n')
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fd.write(include % {'basename': idl_basename(inc.filename)})
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if idl.needsJSTypes():
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fd.write(jsvalue_include)
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# Include some extra files if any attributes are infallible.
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for iface in [p for p in idl.productions if p.kind == 'interface']:
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for attr in [m for m in iface.members if isinstance(m, xpidl.Attribute)]:
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if attr.infallible:
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fd.write(infallible_includes)
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break
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fd.write('\n')
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fd.write(header_end)
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for p in idl.productions:
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if p.kind == 'include': continue
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if p.kind == 'cdata':
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fd.write(p.data)
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continue
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if p.kind == 'forward':
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fd.write(forward_decl % {'name': p.name})
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continue
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if p.kind == 'interface':
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write_interface(p, fd)
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continue
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if p.kind == 'typedef':
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printComments(fd, p.doccomments, '')
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fd.write("typedef %s %s;\n\n" % (p.realtype.nativeType('in'),
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p.name))
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fd.write(footer % {'basename': idl_basename(filename)})
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iface_header = r"""
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/* starting interface: %(name)s */
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#define %(defname)s_IID_STR "%(iid)s"
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#define %(defname)s_IID \
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{0x%(m0)s, 0x%(m1)s, 0x%(m2)s, \
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{ %(m3joined)s }}
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"""
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uuid_decoder = re.compile(r"""(?P<m0>[a-f0-9]{8})-
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(?P<m1>[a-f0-9]{4})-
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(?P<m2>[a-f0-9]{4})-
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(?P<m3>[a-f0-9]{4})-
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(?P<m4>[a-f0-9]{12})$""", re.X)
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iface_prolog = """ {
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(%(defname)s_IID)
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"""
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iface_epilog = """};
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NS_DEFINE_STATIC_IID_ACCESSOR(%(name)s, %(defname)s_IID)
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/* Use this macro when declaring classes that implement this interface. */
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#define NS_DECL_%(macroname)s """
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iface_forward = """
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/* Use this macro to declare functions that forward the behavior of this interface to another object. */
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#define NS_FORWARD_%(macroname)s(_to) """
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iface_forward_safe = """
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/* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */
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#define NS_FORWARD_SAFE_%(macroname)s(_to) """
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iface_template_prolog = """
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#if 0
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/* Use the code below as a template for the implementation class for this interface. */
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/* Header file */
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class %(implclass)s : public %(name)s
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_%(macroname)s
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%(implclass)s();
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private:
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~%(implclass)s();
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protected:
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/* additional members */
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};
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/* Implementation file */
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NS_IMPL_ISUPPORTS(%(implclass)s, %(name)s)
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%(implclass)s::%(implclass)s()
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{
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/* member initializers and constructor code */
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}
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%(implclass)s::~%(implclass)s()
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{
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/* destructor code */
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}
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"""
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example_tmpl = """%(returntype)s %(implclass)s::%(nativeName)s(%(paramList)s)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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"""
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iface_template_epilog = """/* End of implementation class template. */
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#endif
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"""
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attr_infallible_tmpl = """\
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inline %(realtype)s%(nativename)s(%(args)s)
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{
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%(realtype)sresult;
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mozilla::DebugOnly<nsresult> rv = %(nativename)s(%(argnames)s&result);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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return result;
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}
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"""
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def write_interface(iface, fd):
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if iface.namemap is None:
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raise Exception("Interface was not resolved.")
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def write_const_decls(g):
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fd.write(" enum {\n")
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enums = []
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for c in g:
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printComments(fd, c.doccomments, ' ')
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basetype = c.basetype
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value = c.getValue()
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enums.append(" %(name)s = %(value)s%(signed)s" % {
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'name': c.name,
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'value': value,
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'signed': (not basetype.signed) and 'U' or ''})
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fd.write(",\n".join(enums))
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fd.write("\n };\n\n")
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def write_method_decl(m):
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printComments(fd, m.doccomments, ' ')
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fd.write(" /* %s */\n" % m.toIDL())
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fd.write(" %s = 0;\n\n" % methodAsNative(m))
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def write_attr_decl(a):
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printComments(fd, a.doccomments, ' ')
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fd.write(" /* %s */\n" % a.toIDL());
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fd.write(" %s = 0;\n" % attributeAsNative(a, True))
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if a.infallible:
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fd.write(attr_infallible_tmpl %
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{'realtype': a.realtype.nativeType('in'),
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'nativename': attributeNativeName(a, getter=True),
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'args': '' if not a.implicit_jscontext else 'JSContext* cx',
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'argnames': '' if not a.implicit_jscontext else 'cx, '})
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if not a.readonly:
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fd.write(" %s = 0;\n" % attributeAsNative(a, False))
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fd.write("\n")
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defname = iface.name.upper()
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if iface.name[0:2] == 'ns':
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defname = 'NS_' + defname[2:]
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names = uuid_decoder.match(iface.attributes.uuid).groupdict()
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m3str = names['m3'] + names['m4']
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names['m3joined'] = ", ".join(["0x%s" % m3str[i:i+2] for i in xrange(0, 16, 2)])
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if iface.name[2] == 'I':
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implclass = iface.name[:2] + iface.name[3:]
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else:
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implclass = '_MYCLASS_'
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names.update({'defname': defname,
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'macroname': iface.name.upper(),
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'name': iface.name,
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'iid': iface.attributes.uuid,
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'implclass': implclass})
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fd.write(iface_header % names)
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printComments(fd, iface.doccomments, '')
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fd.write("class ")
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foundcdata = False
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for m in iface.members:
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if isinstance(m, xpidl.CDATA):
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foundcdata = True
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if not foundcdata:
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fd.write("NS_NO_VTABLE ")
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if iface.attributes.deprecated:
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fd.write("MOZ_DEPRECATED ")
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fd.write(iface.name)
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if iface.base:
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fd.write(" : public %s" % iface.base)
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fd.write(iface_prolog % names)
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for key, group in itertools.groupby(iface.members, key=type):
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if key == xpidl.ConstMember:
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write_const_decls(group) # iterator of all the consts
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else:
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for member in group:
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if key == xpidl.Attribute:
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write_attr_decl(member)
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elif key == xpidl.Method:
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write_method_decl(member)
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elif key == xpidl.CDATA:
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fd.write(" %s" % member.data)
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else:
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raise Exception("Unexpected interface member: %s" % member)
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fd.write(iface_epilog % names)
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for member in iface.members:
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if isinstance(member, xpidl.Attribute):
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if member.infallible:
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fd.write("\\\n using %s::%s; " % (iface.name, attributeNativeName(member, True)))
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fd.write("\\\n %s override; " % attributeAsNative(member, True))
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if not member.readonly:
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fd.write("\\\n %s override; " % attributeAsNative(member, False))
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elif isinstance(member, xpidl.Method):
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fd.write("\\\n %s override; " % methodAsNative(member))
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if len(iface.members) == 0:
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fd.write('\\\n /* no methods! */')
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elif not member.kind in ('attribute', 'method'):
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fd.write('\\')
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fd.write(iface_forward % names)
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def emitTemplate(forward_infallible, tmpl, tmpl_notxpcom=None):
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if tmpl_notxpcom == None:
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tmpl_notxpcom = tmpl
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for member in iface.members:
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if isinstance(member, xpidl.Attribute):
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if forward_infallible and member.infallible:
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fd.write("\\\n using %s::%s; " % (iface.name, attributeNativeName(member, True)))
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fd.write(tmpl % {'asNative': attributeAsNative(member, True),
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'nativeName': attributeNativeName(member, True),
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'paramList': attributeParamNames(member)})
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if not member.readonly:
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fd.write(tmpl % {'asNative': attributeAsNative(member, False),
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'nativeName': attributeNativeName(member, False),
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'paramList': attributeParamNames(member)})
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elif isinstance(member, xpidl.Method):
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if member.notxpcom:
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fd.write(tmpl_notxpcom % {'asNative': methodAsNative(member),
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'nativeName': methodNativeName(member),
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'paramList': paramlistNames(member)})
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else:
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fd.write(tmpl % {'asNative': methodAsNative(member),
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'nativeName': methodNativeName(member),
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'paramList': paramlistNames(member)})
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if len(iface.members) == 0:
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fd.write('\\\n /* no methods! */')
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elif not member.kind in ('attribute', 'method'):
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fd.write('\\')
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emitTemplate(True,
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"\\\n %(asNative)s override { return _to %(nativeName)s(%(paramList)s); } ")
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fd.write(iface_forward_safe % names)
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# Don't try to safely forward notxpcom functions, because we have no
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# sensible default error return. Instead, the caller will have to
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# implement them.
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emitTemplate(False,
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"\\\n %(asNative)s override { return !_to ? NS_ERROR_NULL_POINTER : _to->%(nativeName)s(%(paramList)s); } ",
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"\\\n %(asNative)s override; ")
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fd.write(iface_template_prolog % names)
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for member in iface.members:
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if isinstance(member, xpidl.ConstMember) or isinstance(member, xpidl.CDATA): continue
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fd.write("/* %s */\n" % member.toIDL())
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if isinstance(member, xpidl.Attribute):
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fd.write(example_tmpl % {'implclass': implclass,
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'returntype': attributeReturnType(member, 'NS_IMETHODIMP'),
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'nativeName': attributeNativeName(member, True),
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'paramList': attributeParamlist(member, True)})
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if not member.readonly:
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fd.write(example_tmpl % {'implclass': implclass,
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'returntype': attributeReturnType(member, 'NS_IMETHODIMP'),
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'nativeName': attributeNativeName(member, False),
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'paramList': attributeParamlist(member, False)})
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elif isinstance(member, xpidl.Method):
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fd.write(example_tmpl % {'implclass': implclass,
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'returntype': methodReturnType(member, 'NS_IMETHODIMP'),
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'nativeName': methodNativeName(member),
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'paramList': paramlistAsNative(member, empty='')})
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fd.write('\n')
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fd.write(iface_template_epilog)
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if __name__ == '__main__':
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from optparse import OptionParser
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o = OptionParser()
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o.add_option('-I', action='append', dest='incdirs', default=['.'],
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help="Directory to search for imported files")
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o.add_option('--cachedir', dest='cachedir', default=None,
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help="Directory in which to cache lex/parse tables.")
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o.add_option('-o', dest='outfile', default=None,
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help="Output file (default is stdout)")
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o.add_option('-d', dest='depfile', default=None,
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help="Generate a make dependency file")
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o.add_option('--regen', action='store_true', dest='regen', default=False,
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help="Regenerate IDL Parser cache")
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options, args = o.parse_args()
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file = args[0] if args else None
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if options.cachedir is not None:
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if not os.path.isdir(options.cachedir):
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os.mkdir(options.cachedir)
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sys.path.append(options.cachedir)
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# The only thing special about a regen is that there are no input files.
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if options.regen:
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if options.cachedir is None:
|
|
print >>sys.stderr, "--regen useless without --cachedir"
|
|
# Delete the lex/yacc files. Ply is too stupid to regenerate them
|
|
# properly
|
|
for fileglobs in [os.path.join(options.cachedir, f) for f in ["xpidllex.py*", "xpidlyacc.py*"]]:
|
|
for filename in glob.glob(fileglobs):
|
|
os.remove(filename)
|
|
|
|
# Instantiate the parser.
|
|
p = xpidl.IDLParser(outputdir=options.cachedir)
|
|
|
|
if options.regen:
|
|
sys.exit(0)
|
|
|
|
if options.depfile is not None and options.outfile is None:
|
|
print >>sys.stderr, "-d requires -o"
|
|
sys.exit(1)
|
|
|
|
if options.outfile is not None:
|
|
outfd = open(options.outfile, 'w')
|
|
closeoutfd = True
|
|
else:
|
|
outfd = sys.stdout
|
|
closeoutfd = False
|
|
|
|
idl = p.parse(open(file).read(), filename=file)
|
|
idl.resolve(options.incdirs, p)
|
|
print_header(idl, outfd, file)
|
|
|
|
if closeoutfd:
|
|
outfd.close()
|
|
|
|
if options.depfile is not None:
|
|
dirname = os.path.dirname(options.depfile)
|
|
if dirname:
|
|
try:
|
|
os.makedirs(dirname)
|
|
except:
|
|
pass
|
|
depfd = open(options.depfile, 'w')
|
|
deps = [dep.replace('\\', '/') for dep in idl.deps]
|
|
|
|
print >>depfd, "%s: %s" % (options.outfile, " ".join(deps))
|
|
for dep in deps:
|
|
print >>depfd, "%s:" % dep
|