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/**********************************************************************
Audacity: A Digital Audio Editor
@file PluginIPCUtils.cpp
@author Vitaly Sverchinsky
Part of lib-module-manager library.
**********************************************************************/
#include "PluginIPCUtils.h"
#include <cstring>
#include "PluginDescriptor.h"
#include "IPCChannel.h"
#include "XMLWriter.h"
using namespace detail;
namespace {
using HeaderBlock = size_t;
constexpr auto HeaderBlockSize = sizeof(HeaderBlock);
constexpr auto NodePlugin = "Plugin";
constexpr auto NodeError = "Error";
constexpr auto AttrErrorMessage = "msg";
}
bool detail::ParseRequestString(const wxString& req, wxString& providerId, wxString& pluginPath)
{
auto strings = wxSplit(req, ';');
if(strings.size() == 2)
{
providerId = strings[0];
pluginPath = strings[1];
return true;
}
return false;
}
wxString detail::MakeRequestString(const wxString& providerId, const wxString& pluginPath)
{
return wxJoin(wxArrayStringEx {providerId, pluginPath}, ';');
}
void detail::PutMessage(IPCChannel& channel, const wxString& value)
{
auto utf8 = value.ToUTF8();
const HeaderBlock length = utf8.length();
channel.Send(&length, HeaderBlockSize);
if(length > 0)
channel.Send(utf8.data(), length);
}
void InputMessageReader::ConsumeBytes(const void* bytes, size_t length)
{
auto from = mBuffer.size();
mBuffer.resize(from + length);
std::memcpy(&mBuffer[from], bytes, length);
}
bool InputMessageReader::CanPop() const noexcept
{
if(mBuffer.size() >= HeaderBlockSize)
{
auto expectedSize = *reinterpret_cast<const HeaderBlock*>(mBuffer.data());
return mBuffer.size() >= expectedSize + HeaderBlockSize;
}
return false;
}
wxString InputMessageReader::Pop()
{
wxString message;
const auto length = *reinterpret_cast<const HeaderBlock*>(mBuffer.data());
assert(mBuffer.size() >= length + HeaderBlockSize);
if(length > 0)
message = wxString::FromUTF8(mBuffer.data() + HeaderBlockSize, length);
mBuffer.erase(mBuffer.begin(), mBuffer.begin() + HeaderBlockSize + length);
return message;
}
bool PluginValidationResult::IsValid() const noexcept
{
return !mHasError && !mDescriptors.empty();
}
bool PluginValidationResult::HasError() const noexcept
{
return mHasError;
}
const wxString& PluginValidationResult::GetErrorMessage() const noexcept
{
return mErrorMessage;
}
void PluginValidationResult::Add(PluginDescriptor&& desc)
{
mDescriptors.push_back(std::move(desc));
}
void PluginValidationResult::SetError(const wxString& msg)
{
mHasError = true;
mErrorMessage = msg;
}
const std::vector<PluginDescriptor>& PluginValidationResult::GetDescriptors() const noexcept
{
return mDescriptors;
}
bool PluginValidationResult::HandleXMLTag(const std::string_view& tag, const AttributesList& attrs)
{
if(tag == NodeError)
{
mHasError = true;
for(auto& p : attrs)
{
auto key = wxString(p.first.data(), p.first.length());
auto& attr = p.second;
if(key == AttrErrorMessage)
mErrorMessage = attr.ToWString();
}
}
return true;
}
void PluginValidationResult::HandleXMLEndTag(const std::string_view&) { }
XMLTagHandler* PluginValidationResult::HandleXMLChild(const std::string_view& tag)
{
if(tag == PluginDescriptor::XMLNodeName)
{
mDescriptors.resize(mDescriptors.size() + 1);
return &mDescriptors.back();
}
return nullptr;
}
void PluginValidationResult::WriteXML(XMLWriter& writer) const
{
if(mHasError)
{
writer.StartTag(NodeError);
writer.WriteAttr(AttrErrorMessage, mErrorMessage);
writer.EndTag(NodeError);
}
if(!mDescriptors.empty())
{
writer.StartTag(NodePlugin);
for(auto& desc : mDescriptors)
desc.WriteXML(writer);
writer.EndTag(NodePlugin);
}
}
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