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-rw-r--r--xpcom/idl-parser/xpidl/header.py723
1 files changed, 723 insertions, 0 deletions
diff --git a/xpcom/idl-parser/xpidl/header.py b/xpcom/idl-parser/xpidl/header.py
new file mode 100644
index 0000000000..ed179b1bad
--- /dev/null
+++ b/xpcom/idl-parser/xpidl/header.py
@@ -0,0 +1,723 @@
+#!/usr/bin/env python
+# header.py - Generate C++ header files from IDL.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+"""Print a C++ header file for the IDL files specified on the command line"""
+
+import itertools
+import os.path
+import re
+
+from xpidl import xpidl
+
+printdoccomments = False
+
+if printdoccomments:
+
+ def printComments(fd, clist, indent):
+ for c in clist:
+ fd.write("%s%s\n" % (indent, c))
+
+else:
+
+ def printComments(fd, clist, indent):
+ pass
+
+
+def firstCap(str):
+ return str[0].upper() + str[1:]
+
+
+def attributeParamName(a):
+ return "a" + firstCap(a.name)
+
+
+def attributeParamNames(a, getter, return_param=True):
+ if getter and (a.notxpcom or not return_param):
+ l = []
+ else:
+ l = [attributeParamName(a)]
+ if a.implicit_jscontext:
+ l.insert(0, "cx")
+ return ", ".join(l)
+
+
+def attributeNativeName(a, getter):
+ binaryname = a.binaryname is not None and a.binaryname or firstCap(a.name)
+ return "%s%s" % (getter and "Get" or "Set", binaryname)
+
+
+def attributeAttributes(a, getter):
+ ret = ""
+
+ if a.must_use:
+ ret = "[[nodiscard]] " + ret
+
+ # Ideally, we'd set MOZ_CAN_RUN_SCRIPT in the "scriptable and not
+ # builtinclass" case too, so we'd just have memberCanRunScript() check
+ # explicit_setter_can_run_script/explicit_setter_can_run_script and call it
+ # here. But that would likely require a fair amount of Gecko-side
+ # annotation work. See bug 1534292.
+ if (a.explicit_getter_can_run_script and getter) or (
+ a.explicit_setter_can_run_script and not getter
+ ):
+ ret = "MOZ_CAN_RUN_SCRIPT " + ret
+
+ return ret
+
+
+def attributeReturnType(a, getter, macro):
+ """macro should be NS_IMETHOD or NS_IMETHODIMP"""
+ # Pick the type to be returned from the getter/setter.
+ if a.notxpcom:
+ ret = a.realtype.nativeType("in").strip() if getter else "void"
+ else:
+ ret = "nsresult"
+
+ # Set calling convention and virtual-ness
+ if a.nostdcall:
+ if macro == "NS_IMETHOD":
+ # This is the declaration.
+ ret = "virtual %s" % ret
+ else:
+ if ret == "nsresult":
+ ret = macro
+ else:
+ ret = "%s_(%s)" % (macro, ret)
+
+ return attributeAttributes(a, getter) + ret
+
+
+def attributeParamlist(a, getter, return_param=True):
+ if getter and (a.notxpcom or not return_param):
+ l = []
+ else:
+ l = [
+ "%s%s"
+ % (a.realtype.nativeType(getter and "out" or "in"), attributeParamName(a))
+ ]
+ if a.implicit_jscontext:
+ l.insert(0, "JSContext* cx")
+
+ return ", ".join(l)
+
+
+def attributeAsNative(a, getter, declType="NS_IMETHOD"):
+ params = {
+ "returntype": attributeReturnType(a, getter, declType),
+ "binaryname": attributeNativeName(a, getter),
+ "paramlist": attributeParamlist(a, getter),
+ }
+ return "%(returntype)s %(binaryname)s(%(paramlist)s)" % params
+
+
+def methodNativeName(m):
+ return m.binaryname is not None and m.binaryname or firstCap(m.name)
+
+
+def methodAttributes(m):
+ ret = ""
+
+ if m.must_use:
+ ret = "[[nodiscard]] " + ret
+
+ # Ideally, we'd set MOZ_CAN_RUN_SCRIPT in the "scriptable and not
+ # builtinclass" case too, so we'd just have memberCanRunScript() check
+ # explicit_can_run_script and call it here. But that would likely require
+ # a fair amount of Gecko-side annotation work. See bug 1534292.
+ if m.explicit_can_run_script:
+ ret = "MOZ_CAN_RUN_SCRIPT " + ret
+
+ return ret
+
+
+def methodReturnType(m, macro):
+ """macro should be NS_IMETHOD or NS_IMETHODIMP"""
+ if m.notxpcom:
+ ret = m.realtype.nativeType("in").strip()
+ else:
+ ret = "nsresult"
+
+ # Set calling convention and virtual-ness
+ if m.nostdcall:
+ if macro == "NS_IMETHOD":
+ # This is the declaration
+ ret = "virtual %s" % ret
+ else:
+ if ret == "nsresult":
+ ret = macro
+ else:
+ ret = "%s_(%s)" % (macro, ret)
+
+ return methodAttributes(m) + ret
+
+
+def methodAsNative(m, declType="NS_IMETHOD"):
+ return "%s %s(%s)" % (
+ methodReturnType(m, declType),
+ methodNativeName(m),
+ paramlistAsNative(m),
+ )
+
+
+def paramlistAsNative(m, empty="void", return_param=True):
+ l = [paramAsNative(p) for p in m.params]
+
+ if m.implicit_jscontext:
+ l.append("JSContext* cx")
+
+ if m.optional_argc:
+ l.append("uint8_t _argc")
+
+ if not m.notxpcom and m.realtype.name != "void" and return_param:
+ l.append(
+ paramAsNative(
+ xpidl.Param(
+ paramtype="out",
+ type=None,
+ name="_retval",
+ attlist=[],
+ location=None,
+ realtype=m.realtype,
+ )
+ )
+ )
+
+ # Set any optional out params to default to nullptr. Skip if we just added
+ # extra non-optional args to l.
+ if len(l) == len(m.params):
+ paramIter = len(m.params) - 1
+ while (
+ paramIter >= 0
+ and m.params[paramIter].optional
+ and "out" in m.params[paramIter].paramtype
+ ):
+ t = m.params[paramIter].type
+ # Strings can't be optional, so this shouldn't happen, but let's make sure:
+ if t == "AString" or t == "ACString" or t == "AUTF8String":
+ break
+ l[paramIter] += " = nullptr"
+ paramIter -= 1
+
+ if len(l) == 0:
+ return empty
+
+ return ", ".join(l)
+
+
+def memberCanRunScript(member):
+ # This can only happen if the member is scriptable and its interface is not builtinclass.
+ return member.isScriptable() and not member.iface.attributes.builtinclass
+
+
+def runScriptAnnotation(member):
+ return "JS_HAZ_CAN_RUN_SCRIPT " if memberCanRunScript(member) else ""
+
+
+def paramAsNative(p):
+ default_spec = ""
+ if p.default_value:
+ default_spec = " = " + p.default_value
+ return "%s%s%s" % (p.nativeType(), p.name, default_spec)
+
+
+def paramlistNames(m, return_param=True):
+ names = [p.name for p in m.params]
+
+ if m.implicit_jscontext:
+ names.append("cx")
+
+ if m.optional_argc:
+ names.append("_argc")
+
+ if not m.notxpcom and m.realtype.name != "void" and return_param:
+ names.append("_retval")
+
+ if len(names) == 0:
+ return ""
+ return ", ".join(names)
+
+
+header = """/*
+ * DO NOT EDIT. THIS FILE IS GENERATED FROM $SRCDIR/%(relpath)s
+ */
+
+#ifndef __gen_%(basename)s_h__
+#define __gen_%(basename)s_h__
+"""
+
+include = """
+#include "%(basename)s.h"
+"""
+
+jsvalue_include = """
+#include "js/Value.h"
+"""
+
+infallible_includes = """
+#include "mozilla/AlreadyAddRefed.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/DebugOnly.h"
+"""
+
+can_run_script_includes = """
+#include "js/GCAnnotations.h"
+"""
+
+header_end = """/* For IDL files that don't want to include root IDL files. */
+#ifndef NS_NO_VTABLE
+#define NS_NO_VTABLE
+#endif
+"""
+
+footer = """
+#endif /* __gen_%(basename)s_h__ */
+"""
+
+forward_decl = """class %(name)s; /* forward declaration */
+
+"""
+
+
+def idl_basename(f):
+ """returns the base name of a file with the last extension stripped"""
+ return os.path.basename(f).rpartition(".")[0]
+
+
+def print_header(idl, fd, filename, relpath):
+ fd.write(header % {"relpath": relpath, "basename": idl_basename(filename)})
+
+ foundinc = False
+ for inc in idl.includes():
+ if not foundinc:
+ foundinc = True
+ fd.write("\n")
+ fd.write(include % {"basename": idl_basename(inc.filename)})
+
+ if idl.needsJSTypes():
+ fd.write(jsvalue_include)
+
+ # Include some extra files if any attributes are infallible.
+ interfaces = [p for p in idl.productions if p.kind == "interface"]
+ wroteRunScriptIncludes = False
+ wroteInfallibleIncludes = False
+ for iface in interfaces:
+ for member in iface.members:
+ if not isinstance(member, xpidl.Attribute) and not isinstance(
+ member, xpidl.Method
+ ):
+ continue
+ if not wroteInfallibleIncludes and member.infallible:
+ fd.write(infallible_includes)
+ wroteInfallibleIncludes = True
+ if not wroteRunScriptIncludes and memberCanRunScript(member):
+ fd.write(can_run_script_includes)
+ wroteRunScriptIncludes = True
+ if wroteRunScriptIncludes and wroteInfallibleIncludes:
+ break
+
+ fd.write("\n")
+ fd.write(header_end)
+
+ for p in idl.productions:
+ if p.kind == "include":
+ continue
+ if p.kind == "cdata":
+ fd.write(p.data)
+ continue
+
+ if p.kind == "webidl":
+ write_webidl(p, fd)
+ continue
+ if p.kind == "forward":
+ fd.write(forward_decl % {"name": p.name})
+ continue
+ if p.kind == "interface":
+ write_interface(p, fd)
+ continue
+ if p.kind == "typedef":
+ printComments(fd, p.doccomments, "")
+ fd.write("typedef %s %s;\n\n" % (p.realtype.nativeType("in"), p.name))
+
+ fd.write(footer % {"basename": idl_basename(filename)})
+
+
+def write_webidl(p, fd):
+ path = p.native.split("::")
+ for seg in path[:-1]:
+ fd.write("namespace %s {\n" % seg)
+ fd.write("class %s; /* webidl %s */\n" % (path[-1], p.name))
+ for seg in reversed(path[:-1]):
+ fd.write("} // namespace %s\n" % seg)
+ fd.write("\n")
+
+
+iface_header = r"""
+/* starting interface: %(name)s */
+#define %(defname)s_IID_STR "%(iid)s"
+
+#define %(defname)s_IID \
+ {0x%(m0)s, 0x%(m1)s, 0x%(m2)s, \
+ { %(m3joined)s }}
+
+"""
+
+uuid_decoder = re.compile(
+ r"""(?P<m0>[a-f0-9]{8})-
+ (?P<m1>[a-f0-9]{4})-
+ (?P<m2>[a-f0-9]{4})-
+ (?P<m3>[a-f0-9]{4})-
+ (?P<m4>[a-f0-9]{12})$""",
+ re.X,
+)
+
+iface_prolog = """ {
+ public:
+
+ NS_DECLARE_STATIC_IID_ACCESSOR(%(defname)s_IID)
+
+"""
+
+iface_scriptable = """\
+ /* Used by ToJSValue to check which scriptable interface is implemented. */
+ using ScriptableInterfaceType = %(name)s;
+
+"""
+
+iface_epilog = """};
+
+ NS_DEFINE_STATIC_IID_ACCESSOR(%(name)s, %(defname)s_IID)"""
+
+iface_decl = """
+
+/* Use this macro when declaring classes that implement this interface. */
+#define NS_DECL_%(macroname)s """
+
+iface_nonvirtual = """
+
+/* Use this macro when declaring the members of this interface when the
+ class doesn't implement the interface. This is useful for forwarding. */
+#define NS_DECL_NON_VIRTUAL_%(macroname)s """
+
+iface_forward = """
+
+/* Use this macro to declare functions that forward the behavior of this interface to another object. */
+#define NS_FORWARD_%(macroname)s(_to) """ # NOQA: E501
+
+iface_forward_safe = """
+
+/* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */
+#define NS_FORWARD_SAFE_%(macroname)s(_to) """ # NOQA: E501
+
+builtin_infallible_tmpl = """\
+ %(attributes)sinline %(realtype)s %(nativename)s(%(args)s)
+ {
+ %(realtype)sresult;
+ mozilla::DebugOnly<nsresult> rv = %(nativename)s(%(argnames)s&result);
+ MOZ_ASSERT(NS_SUCCEEDED(rv));
+ return result;
+ }
+"""
+
+# NOTE: We don't use RefPtr::forget here because we don't want to need the
+# definition of %(realtype)s in scope, which we would need for the
+# AddRef/Release calls.
+refcnt_infallible_tmpl = """\
+ %(attributes)s inline already_AddRefed<%(realtype)s> %(nativename)s(%(args)s)
+ {
+ %(realtype)s* result = nullptr;
+ mozilla::DebugOnly<nsresult> rv = %(nativename)s(%(argnames)s&result);
+ MOZ_ASSERT(NS_SUCCEEDED(rv));
+ return already_AddRefed<%(realtype)s>(result);
+ }
+"""
+
+iface_threadsafe_tmpl = """\
+namespace mozilla::detail {
+template <>
+class InterfaceNeedsThreadSafeRefCnt<%(name)s> : public std::true_type {};
+}
+"""
+
+
+def infallibleDecl(member):
+ isattr = isinstance(member, xpidl.Attribute)
+ ismethod = isinstance(member, xpidl.Method)
+ assert isattr or ismethod
+
+ realtype = member.realtype.nativeType("in")
+ tmpl = builtin_infallible_tmpl
+
+ if member.realtype.kind != "builtin" and member.realtype.kind != "cenum":
+ assert realtype.endswith(" *"), "bad infallible type"
+ tmpl = refcnt_infallible_tmpl
+ realtype = realtype[:-2] # strip trailing pointer
+
+ if isattr:
+ nativename = attributeNativeName(member, getter=True)
+ args = attributeParamlist(member, getter=True, return_param=False)
+ argnames = attributeParamNames(member, getter=True, return_param=False)
+ attributes = attributeAttributes(member, getter=True)
+ else:
+ nativename = methodNativeName(member)
+ args = paramlistAsNative(member, return_param=False)
+ argnames = paramlistNames(member, return_param=False)
+ attributes = methodAttributes(member)
+
+ return tmpl % {
+ "attributes": attributes,
+ "realtype": realtype,
+ "nativename": nativename,
+ "args": args,
+ "argnames": argnames + ", " if argnames else "",
+ }
+
+
+def write_interface(iface, fd):
+ if iface.namemap is None:
+ raise Exception("Interface was not resolved.")
+
+ # Confirm that no names of methods will overload in this interface
+ names = set()
+
+ def record_name(name):
+ if name in names:
+ raise Exception(
+ "Unexpected overloaded virtual method %s in interface %s"
+ % (name, iface.name)
+ )
+ names.add(name)
+
+ for m in iface.members:
+ if type(m) == xpidl.Attribute:
+ record_name(attributeNativeName(m, getter=True))
+ if not m.readonly:
+ record_name(attributeNativeName(m, getter=False))
+ elif type(m) == xpidl.Method:
+ record_name(methodNativeName(m))
+
+ def write_const_decls(g):
+ fd.write(" enum {\n")
+ enums = []
+ for c in g:
+ printComments(fd, c.doccomments, " ")
+ basetype = c.basetype
+ value = c.getValue()
+ enums.append(
+ " %(name)s = %(value)s%(signed)s"
+ % {
+ "name": c.name,
+ "value": value,
+ "signed": (not basetype.signed) and "U" or "",
+ }
+ )
+ fd.write(",\n".join(enums))
+ fd.write("\n };\n\n")
+
+ def write_cenum_decl(b):
+ fd.write(" enum %s : uint%d_t {\n" % (b.basename, b.width))
+ for var in b.variants:
+ fd.write(" %s = %s,\n" % (var.name, var.value))
+ fd.write(" };\n\n")
+
+ def write_method_decl(m):
+ printComments(fd, m.doccomments, " ")
+
+ fd.write(" /* %s */\n" % m.toIDL())
+ fd.write(" %s%s = 0;\n\n" % (runScriptAnnotation(m), methodAsNative(m)))
+
+ if m.infallible:
+ fd.write(infallibleDecl(m))
+
+ def write_attr_decl(a):
+ printComments(fd, a.doccomments, " ")
+
+ fd.write(" /* %s */\n" % a.toIDL())
+
+ fd.write(" %s%s = 0;\n" % (runScriptAnnotation(a), attributeAsNative(a, True)))
+ if a.infallible:
+ fd.write(infallibleDecl(a))
+
+ if not a.readonly:
+ fd.write(
+ " %s%s = 0;\n" % (runScriptAnnotation(a), attributeAsNative(a, False))
+ )
+ fd.write("\n")
+
+ defname = iface.name.upper()
+ if iface.name[0:2] == "ns":
+ defname = "NS_" + defname[2:]
+
+ names = uuid_decoder.match(iface.attributes.uuid).groupdict()
+ m3str = names["m3"] + names["m4"]
+ names["m3joined"] = ", ".join(["0x%s" % m3str[i : i + 2] for i in range(0, 16, 2)])
+
+ if iface.name[2] == "I":
+ implclass = iface.name[:2] + iface.name[3:]
+ else:
+ implclass = "_MYCLASS_"
+
+ names.update(
+ {
+ "defname": defname,
+ "macroname": iface.name.upper(),
+ "name": iface.name,
+ "iid": iface.attributes.uuid,
+ "implclass": implclass,
+ }
+ )
+
+ fd.write(iface_header % names)
+
+ printComments(fd, iface.doccomments, "")
+
+ fd.write("class ")
+ foundcdata = False
+ for m in iface.members:
+ if isinstance(m, xpidl.CDATA):
+ foundcdata = True
+
+ if not foundcdata:
+ fd.write("NS_NO_VTABLE ")
+
+ fd.write(iface.name)
+ if iface.base:
+ fd.write(" : public %s" % iface.base)
+ fd.write(iface_prolog % names)
+
+ if iface.attributes.scriptable:
+ fd.write(iface_scriptable % names)
+
+ for key, group in itertools.groupby(iface.members, key=type):
+ if key == xpidl.ConstMember:
+ write_const_decls(group) # iterator of all the consts
+ else:
+ for member in group:
+ if key == xpidl.Attribute:
+ write_attr_decl(member)
+ elif key == xpidl.Method:
+ write_method_decl(member)
+ elif key == xpidl.CDATA:
+ fd.write(" %s" % member.data)
+ elif key == xpidl.CEnum:
+ write_cenum_decl(member)
+ else:
+ raise Exception("Unexpected interface member: %s" % member)
+
+ fd.write(iface_epilog % names)
+
+ if iface.attributes.rust_sync:
+ fd.write(iface_threadsafe_tmpl % names)
+
+ fd.write(iface_decl % names)
+
+ def writeDeclaration(fd, iface, virtual):
+ declType = "NS_IMETHOD" if virtual else "nsresult"
+ suffix = " override" if virtual else ""
+ for member in iface.members:
+ if isinstance(member, xpidl.Attribute):
+ if member.infallible:
+ fd.write(
+ "\\\n using %s::%s; "
+ % (iface.name, attributeNativeName(member, True))
+ )
+ fd.write(
+ "\\\n %s%s; " % (attributeAsNative(member, True, declType), suffix)
+ )
+ if not member.readonly:
+ fd.write(
+ "\\\n %s%s; "
+ % (attributeAsNative(member, False, declType), suffix)
+ )
+ elif isinstance(member, xpidl.Method):
+ fd.write("\\\n %s%s; " % (methodAsNative(member, declType), suffix))
+ if len(iface.members) == 0:
+ fd.write("\\\n /* no methods! */")
+ elif member.kind not in ("attribute", "method"):
+ fd.write("\\")
+
+ writeDeclaration(fd, iface, True)
+ fd.write(iface_nonvirtual % names)
+ writeDeclaration(fd, iface, False)
+ fd.write(iface_forward % names)
+
+ def emitTemplate(forward_infallible, tmpl, tmpl_notxpcom=None):
+ if tmpl_notxpcom is None:
+ tmpl_notxpcom = tmpl
+ for member in iface.members:
+ if isinstance(member, xpidl.Attribute):
+ if forward_infallible and member.infallible:
+ fd.write(
+ "\\\n using %s::%s; "
+ % (iface.name, attributeNativeName(member, True))
+ )
+ attr_tmpl = tmpl_notxpcom if member.notxpcom else tmpl
+ fd.write(
+ attr_tmpl
+ % {
+ "asNative": attributeAsNative(member, True),
+ "nativeName": attributeNativeName(member, True),
+ "paramList": attributeParamNames(member, True),
+ }
+ )
+ if not member.readonly:
+ fd.write(
+ attr_tmpl
+ % {
+ "asNative": attributeAsNative(member, False),
+ "nativeName": attributeNativeName(member, False),
+ "paramList": attributeParamNames(member, False),
+ }
+ )
+ elif isinstance(member, xpidl.Method):
+ if member.notxpcom:
+ fd.write(
+ tmpl_notxpcom
+ % {
+ "asNative": methodAsNative(member),
+ "nativeName": methodNativeName(member),
+ "paramList": paramlistNames(member),
+ }
+ )
+ else:
+ fd.write(
+ tmpl
+ % {
+ "asNative": methodAsNative(member),
+ "nativeName": methodNativeName(member),
+ "paramList": paramlistNames(member),
+ }
+ )
+ if len(iface.members) == 0:
+ fd.write("\\\n /* no methods! */")
+ elif member.kind not in ("attribute", "method"):
+ fd.write("\\")
+
+ emitTemplate(
+ True,
+ "\\\n %(asNative)s override { return _to %(nativeName)s(%(paramList)s); } ",
+ )
+
+ fd.write(iface_forward_safe % names)
+
+ # Don't try to safely forward notxpcom functions, because we have no
+ # sensible default error return. Instead, the caller will have to
+ # implement them.
+ emitTemplate(
+ False,
+ "\\\n %(asNative)s override { return !_to ? NS_ERROR_NULL_POINTER : _to->%(nativeName)s(%(paramList)s); } ", # NOQA: E501
+ "\\\n %(asNative)s override; ",
+ )
+
+ fd.write("\n\n")
+
+
+def main(outputfile):
+ xpidl.IDLParser()
+
+
+if __name__ == "__main__":
+ main(None)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 16:22:41 +0000