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#!/usr/bin/python
import re, sys, os
import argparse
class ParsedMethod():
def __init__(self, name, methodPrefix):
self.name = name
self.methodPrefix = methodPrefix
self.options = {}
def generateBinding(self, out, objectPrefix = ""):
length = 0
if "argc" in self.options:
length = self.options["argc"]
out.write(" %sdefineDefaultProperty(engine, QStringLiteral(\"%s\"), %s_%s, %s);\n" % (objectPrefix, self.name, self.methodPrefix, self.name, length))
if "alias" in self.options:
out.write(" %sdefineDefaultProperty(engine, QStringLiteral(\"%s\"), %s_%s, %s);\n" % (objectPrefix, self.options["alias"], self.methodPrefix, self.name, length))
class ParsedClass():
def __init__(self, name):
self.name = name
self.options = {}
self.methods = []
self.ctor_methods = []
def needsConstructor(self):
return len(self.ctor_methods) > 0
def parseOptions(options):
options = options.split(" ")
result = {}
for opt in [options[i : i + 2] for i in range(0, len(options), 2)]:
result[opt[0]] = opt[1]
return result
def parseMethod(line, match, methodPrefix):
annotatePattern = re.compile(r".*QV4_ANNOTATE\((?P<Options>.+)\).*")
argcPattern = re.compile(r".*QV4_ARGC\((?P<count>\d+)\).*")
method = ParsedMethod(match.group("MethodName"), methodPrefix)
annotateMatch = annotatePattern.match(line)
if annotateMatch:
method.options = parseOptions(annotateMatch.group("Options"))
argcMatch = argcPattern.match(line)
if argcMatch:
method.options["argc"] = argcMatch.group("count")
return method
def parse(lines):
classes = []
currentClass = None
classPattern = re.compile(r".*QV4_JS_CLASS\((?P<ClassName>\w+)\).*")
annotatePattern = re.compile(r".*QV4_ANNOTATE\((?P<Options>.+)\).*")
methodPattern = re.compile(r".*\smethod_(?P<MethodName>\w+)\(.*\).*;")
ctorMethodPattern = re.compile(r".*\sctor_method_(?P<MethodName>\w+)\(.*\).*;")
for line in lines:
line = line.strip()
classMatch = classPattern.match(line)
if classMatch:
name = classMatch.group("ClassName")
if currentClass != None:
classes.append(currentClass)
currentClass = ParsedClass(name)
continue
if currentClass == None:
continue
methodMatch = methodPattern.match(line)
if methodMatch:
method = parseMethod(line, methodMatch, "method")
currentClass.methods.append(method)
continue
ctorMethodMatch = ctorMethodPattern.match(line)
if ctorMethodMatch:
method = parseMethod(line, ctorMethodMatch, "ctor_method")
currentClass.ctor_methods.append(method)
continue
annotateMatch = annotatePattern.match(line)
if annotateMatch:
currentClass.options = parseOptions(annotateMatch.group("Options"))
continue
if currentClass != None:
classes.append(currentClass)
return classes
def generateBinding(out, parsedClass, vtableEntries):
if parsedClass.needsConstructor():
ctorClass = parsedClass.name.replace("Prototype", "Ctor")
out.write("class %s: public QV4::FunctionObject {\n" % ctorClass);
out.write("public:\n");
out.write(" %s(QV4::ExecutionContext *scope)\n" % ctorClass);
out.write(" : QV4::FunctionObject(scope, scope->engine->newIdentifier(QStringLiteral(\"%s\")))\n" % ctorClass.replace("Ctor", ""));
out.write(" { vtbl = &static_vtbl; }\n");
out.write("\n");
out.write("protected:\n");
out.write(" static const QV4::ManagedVTable static_vtbl;\n");
out.write("};\n\n");
out.write("const QV4::ManagedVTable %s::static_vtbl = {\n" % ctorClass);
ctorOverrides = set()
for method in parsedClass.ctor_methods:
ctorOverrides.add(method.name)
for method in vtableEntries:
entry = "FunctionObject::" + method
if method in ctorOverrides:
entry = parsedClass.name + "::ctor_method_" + method
out.write(" " + entry + ",\n")
out.write(" \"%s\"\n" % parsedClass.name.replace("Prototype", "Ctor"));
out.write("};\n\n")
out.write("QV4::Object *%s::newConstructor(QV4::ExecutionContext *scope)\n" % parsedClass.name)
out.write("{\n")
out.write(" return new (scope->engine->memoryManager) %s(scope);\n" % ctorClass)
out.write("}\n\n")
ctorSignature = ""
if parsedClass.needsConstructor():
ctorSignature = ", const Value &ctor"
out.write("void %s::initClass(QV4::ExecutionEngine *engine%s)\n" % (parsedClass.name, ctorSignature))
out.write("{\n")
if parsedClass.needsConstructor():
ctor = "ctor.objectValue()->"
ctorLength = 0
if "argc" in parsedClass.options:
ctorLength = parsedClass.options["argc"]
out.write(" %sdefineReadonlyProperty(engine->id_prototype, QV4::Value::fromObject(this));\n" % ctor)
out.write(" %sdefineReadonlyProperty(engine->id_length, QV4::Value::fromInt32(%s));\n" % (ctor, ctorLength))
out.write("\n")
for method in parsedClass.ctor_methods:
if method.name == "construct" or method.name == "call":
continue
method.generateBinding(out, ctor);
out.write("\n")
out.write(" defineDefaultProperty(engine, QStringLiteral(\"constructor\"), ctor);\n");
out.write("\n")
for method in parsedClass.methods:
method.generateBinding(out)
out.write("}\n")
def extractManagedVTableLayout(basePath):
def VTableDefintionIterator(lines):
i = 0
while i < len(lines):
if lines[i].strip().startswith("#define DEFINE_MANAGED_VTABLE(classname)"):
break;
i = i + 1
if i >= len(lines):
return
i = i + 1
if not lines[i].strip().startswith("const ManagedVTable classname::static_vtbl ="):
print("Expected static_vtbl definition at line %s" % i)
return
i = i + 1
if not lines[i].strip().startswith("{"):
print("Expected static_vtbl definition at line %s" % i)
return
i = i + 1
while i < len(lines):
line = lines[i].strip()
if "#classname" in line:
break
yield line.split(",")[0]
i = i + 1
return
qv4managedHeader = basePath + "/qv4managed_p.h"
fields = []
try:
header = open(qv4managedHeader, "r")
it = VTableDefintionIterator(header.read().splitlines())
for entry in it:
fields.append(entry)
header.close()
except IOError:
print("Could not open qv4managed_p.h at %s" % qv4managedHeader)
sys.exit(1)
return fields
parser = argparse.ArgumentParser(description="Generate V4 JS class bindings")
parser.add_argument("input")
parser.add_argument("--output")
options = parser.parse_args()
vtableEntries = extractManagedVTableLayout(os.path.dirname(os.path.abspath(options.input)))
if len(vtableEntries) == 0:
print("Could not parse vtable layout from qv4managed_p.h")
sys.exit(1)
f = open(options.input)
out = sys.stdout
if options.output != None:
out = open(options.output, 'w')
lines = f.read().splitlines()
classes = parse(lines)
f.close()
out.write("/* Generated file, do not edit */\n")
out.write("#include \"%s\"\n" % options.input)
for parsedClass in classes:
out.write("\n")
generateBinding(out, parsedClass, vtableEntries)
out.close()
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