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genbindings: normalize cabi template returns

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mappu 2024-09-17 18:28:14 +12:00
parent d4b4465928
commit 97f0141e27
1 changed files with 17 additions and 56 deletions
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73
cmd/genbindings/emitcabi.go
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@ -312,67 +312,28 @@ func emitAssignCppToCabi(assignExpression string, p CppParameter, rvalue string)
} else if t, ok := p.QListOf(); ok {
if t.ParameterType == "QString" {
// Combo
// "char** _out, int64_t* _out_Lengths, size_t* _out_len")
// In some cases rvalue is a function call and the temporary
// is necessary; in some cases it's a literal and the temporary is
// elided; but in some cases it's a Qt class and the temporary goes
// through a copy constructor
// TODO Detect safe cases where this can be optimized
shouldReturn = p.RenderTypeQtCpp() + " " + namePrefix + "_ret = "
shouldReturn = p.RenderTypeQtCpp() + " " + namePrefix + "_ret = "
afterCall += indent + "// Convert QStringList from C++ memory to manually-managed C memory\n"
afterCall += indent + "struct miqt_string** " + namePrefix + "_arr = static_cast<struct miqt_string**>(malloc(sizeof(struct miqt_string*) * " + namePrefix + "_ret.length()));\n"
afterCall += indent + "for (size_t i = 0, e = " + namePrefix + "_ret.length(); i < e; ++i) {\n"
afterCall += emitAssignCppToCabi(indent+"\t"+namePrefix+"_arr[i] = ", t, namePrefix+"_ret[i]")
afterCall += indent + "}\n"
afterCall += indent + "// Convert QList<> from C++ memory to manually-managed C memory\n"
afterCall += indent + "" + t.RenderTypeCabi() + "* " + namePrefix + "_arr = static_cast<" + t.RenderTypeCabi() + "*>(malloc(sizeof(" + t.RenderTypeCabi() + ") * " + namePrefix + "_ret.length()));\n"
afterCall += indent + "for (size_t i = 0, e = " + namePrefix + "_ret.length(); i < e; ++i) {\n"
afterCall += emitAssignCppToCabi(indent+"\t"+namePrefix+"_arr[i] = ", t, namePrefix+"_ret[i]")
afterCall += indent + "}\n"
afterCall += indent + "struct miqt_array* " + namePrefix + "_out = static_cast<struct miqt_array*>(malloc(sizeof(struct miqt_array)));\n"
afterCall += indent + namePrefix + "_out->len = " + namePrefix + "_ret.length();\n"
afterCall += indent + namePrefix + "_out->data = static_cast<void*>(" + namePrefix + "_arr);\n"
afterCall += indent + "struct miqt_array* " + namePrefix + "_out = static_cast<struct miqt_array*>(malloc(sizeof(struct miqt_array)));\n"
afterCall += indent + "" + namePrefix + "_out->len = " + namePrefix + "_ret.length();\n"
afterCall += indent + "" + namePrefix + "_out->data = static_cast<void*>(" + namePrefix + "_arr);\n"
afterCall += indent + assignExpression + "" + namePrefix + "_out;\n"
afterCall += indent + assignExpression + "" + namePrefix + "_out;\n"
} else if !t.QtClassType() || (t.QtClassType() && t.Pointer) { // QList<int>, QList<QFoo*>
// In some cases rvalue is a function call and the temporary
// is necessary; in some cases it's a literal and the temporary is
// elided; but in some cases it's a Qt class and the temporary goes
// through a copy constructor
// TODO Detect safe cases where this can be optimized
shouldReturn = p.RenderTypeQtCpp() + " " + namePrefix + "_ret = "
afterCall += indent + "// Convert QList<> from C++ memory to manually-managed C memory\n"
afterCall += indent + "" + t.RenderTypeCabi() + "* " + namePrefix + "_arr = static_cast<" + t.RenderTypeCabi() + "*>(malloc(sizeof(" + t.RenderTypeCabi() + ") * " + namePrefix + "_ret.length()));\n"
afterCall += indent + "for (size_t i = 0, e = " + namePrefix + "_ret.length(); i < e; ++i) {\n"
if t.Const {
afterCall += indent + "\t" + namePrefix + "_arr[i] = const_cast<" + t.ConstCast(false).RenderTypeCabi() + ">(" + namePrefix + "_ret[i]);\n"
} else {
afterCall += indent + "\t" + namePrefix + "_arr[i] = " + namePrefix + "_ret[i];\n"
}
afterCall += indent + "}\n"
afterCall += indent + "struct miqt_array* " + namePrefix + "_out = static_cast<struct miqt_array*>(malloc(sizeof(struct miqt_array)));\n"
afterCall += indent + "" + namePrefix + "_out->len = " + namePrefix + "_ret.length();\n"
afterCall += indent + "" + namePrefix + "_out->data = static_cast<void*>(" + namePrefix + "_arr);\n"
afterCall += indent + assignExpression + "" + namePrefix + "_out;\n"
} else { // QList<QFoo>
shouldReturn = p.RenderTypeQtCpp() + " " + namePrefix + "_ret = "
afterCall += indent + "// Convert QList<> from C++ memory to manually-managed C memory of copy-constructed pointers\n"
afterCall += indent + "" + t.RenderTypeCabi() + "* " + namePrefix + "_arr = static_cast<" + t.RenderTypeCabi() + "*>(malloc(sizeof(" + t.RenderTypeCabi() + "*) * " + namePrefix + "_ret.length()));\n"
afterCall += indent + "for (size_t i = 0, e = " + namePrefix + "_ret.length(); i < e; ++i) {\n"
afterCall += indent + "\t" + namePrefix + "_arr[i] = new " + t.ParameterType + "(" + namePrefix + "_ret[i]);\n"
afterCall += indent + "}\n"
afterCall += indent + "struct miqt_array* " + namePrefix + "_out = static_cast<struct miqt_array*>(malloc(sizeof(struct miqt_array)));\n"
afterCall += indent + "" + namePrefix + "_out->len = " + namePrefix + "_ret.length();\n"
afterCall += indent + "" + namePrefix + "_out->data = static_cast<void*>(" + namePrefix + "_arr);\n"
afterCall += indent + assignExpression + "" + namePrefix + "_out;\n"
}
} else if _, ok := p.QSetOf(); ok {
// ...
} else if p.QtClassType() && p.ByRef {
// It's a pointer in disguise, just needs one cast