Initial release
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civ
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// This file is part of VSTGUI. It is subject to the license terms
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// in the LICENSE file found in the top-level directory of this
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// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
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#include "../lib/vstguibase.h"
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#if VSTGUI_ENABLE_XML_PARSER
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#include "cstream.h"
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#include "icontentprovider.h"
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/// @cond ignore
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#if VSTGUI_USE_SYSTEM_EXPAT
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#include <expat.h>
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#else
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#define XML_STATIC 1
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#define XML_NS 0
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#define XML_DTD 0
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#define XML_CONTEXT_BYTES 1024
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#define XML_LARGE_SIZE 1
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#ifdef BYTEORDER
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#define OLD_BYTEORDER = BYTEORDER
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#undef BYTEORDER
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#endif
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#if MAC && defined (__BIG_ENDIAN__)
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#define BYTEORDER 4321
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#else
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#define BYTEORDER 1234
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#endif
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#define HAVE_MEMMOVE
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namespace VSTGUI {
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namespace Xml {
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#include "../thirdparty/expat/expat.h"
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}}
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#endif // VSTGUI_USE_SYSTEM_EXPAT
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#include "xmlparser.h"
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#include <algorithm>
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namespace VSTGUI {
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namespace Xml {
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//------------------------------------------------------------------------
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struct Parser::Impl
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{
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XML_ParserStruct* parser {nullptr};
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IHandler* handler {nullptr};
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};
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//------------------------------------------------------------------------
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static void XMLCALL gStartElementHandler (void* userData, const char* name, const char** atts)
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{
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auto parser = static_cast<Parser*> (userData);
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IHandler* handler = parser ? parser->getHandler () : nullptr;
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if (handler)
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handler->startXmlElement (parser, name, atts);
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}
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//------------------------------------------------------------------------
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static void XMLCALL gEndElementHandler (void* userData, const char* name)
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{
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auto parser = static_cast<Parser*> (userData);
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IHandler* handler = parser ? parser->getHandler () : nullptr;
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if (handler)
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handler->endXmlElement (parser, name);
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}
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//------------------------------------------------------------------------
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static void XMLCALL gCharacterDataHandler (void* userData, const char* s, int len)
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{
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auto parser = static_cast<Parser*> (userData);
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IHandler* handler = parser ? parser->getHandler () : nullptr;
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if (handler)
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handler->xmlCharData (parser, (const int8_t*)s, len);
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}
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//------------------------------------------------------------------------
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static void XMLCALL gCommentHandler (void* userData, const char* string)
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{
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auto parser = static_cast<Parser*> (userData);
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IHandler* handler = parser ? parser->getHandler () : nullptr;
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if (handler)
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handler->xmlComment (parser, string);
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}
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//-----------------------------------------------------------------------------
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Parser::Parser ()
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{
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pImpl = std::unique_ptr<Impl> (new Impl ());
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pImpl->parser = XML_ParserCreate ("UTF-8");
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}
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//-----------------------------------------------------------------------------
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Parser::~Parser () noexcept
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{
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if (pImpl->parser)
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XML_ParserFree (pImpl->parser);
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}
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//-----------------------------------------------------------------------------
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IHandler* Parser::getHandler () const
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{
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return pImpl->handler;
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}
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//-----------------------------------------------------------------------------
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bool Parser::parse (IContentProvider* provider, IHandler* handler)
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{
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if (provider == nullptr || handler == nullptr)
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return false;
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pImpl->handler = handler;
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XML_SetUserData (pImpl->parser, this);
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XML_SetStartElementHandler (pImpl->parser, gStartElementHandler);
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XML_SetEndElementHandler (pImpl->parser, gEndElementHandler);
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XML_SetCharacterDataHandler (pImpl->parser, gCharacterDataHandler);
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XML_SetCommentHandler (pImpl->parser, gCommentHandler);
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static const uint32_t kBufferSize = 0x8000;
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provider->rewind ();
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while (true)
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{
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void* buffer = XML_GetBuffer (pImpl->parser, kBufferSize);
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if (buffer == nullptr)
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{
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pImpl->handler = nullptr;
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return false;
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}
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uint32_t bytesRead = provider->readRawData ((int8_t*)buffer, kBufferSize);
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if (bytesRead == kStreamIOError)
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bytesRead = 0;
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XML_Status status = XML_ParseBuffer (pImpl->parser, static_cast<int> (bytesRead), bytesRead == 0);
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switch (status)
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{
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case XML_STATUS_ERROR:
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{
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XML_Error error = XML_GetErrorCode (pImpl->parser);
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if (error == XML_ERROR_JUNK_AFTER_DOC_ELEMENT) // that's ok
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{
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pImpl->handler = nullptr;
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return true;
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}
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#if DEBUG
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XML_Size currentLineNumber = XML_GetCurrentLineNumber (pImpl->parser);
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DebugPrint ("XML Parser Error on line: %d\n", currentLineNumber);
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DebugPrint ("%s\n", XML_ErrorString (XML_GetErrorCode (pImpl->parser)));
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int offset, size;
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const char* inputContext = XML_GetInputContext (pImpl->parser, &offset, &size);
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if (inputContext)
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{
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int pos = offset;
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while (offset > 0 && pos - offset < 20)
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{
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if (inputContext[offset] == '\n')
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{
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offset++;
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break;
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}
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offset--;
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}
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for (int i = offset; i < size && i - offset < 40; i++)
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{
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if (inputContext[i] == '\n')
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break;
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if (inputContext[i] == '\t')
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DebugPrint (" ");
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else
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DebugPrint ("%c", inputContext[i]);
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}
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DebugPrint ("\n");
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for (int i = offset; i < pos; i++)
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{
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DebugPrint (" ");
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}
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DebugPrint ("^\n");
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}
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#endif
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pImpl->handler = nullptr;
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return false;
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}
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case XML_STATUS_SUSPENDED:
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{
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pImpl->handler = nullptr;
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return true;
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}
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default:
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break;
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}
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if (bytesRead == 0)
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break;
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}
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pImpl->handler = nullptr;
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return true;
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}
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//-----------------------------------------------------------------------------
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bool Parser::stop ()
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{
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XML_StopParser (pImpl->parser, false);
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return true;
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}
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//------------------------------------------------------------------------
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}} // namespaces
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#if !VSTGUI_USE_SYSTEM_EXPAT
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//------------------------------------------------------------------------
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#ifdef __clang__
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wconversion"
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#pragma clang diagnostic ignored "-Wshadow"
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#endif
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namespace VSTGUI {
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namespace Xml {
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#include "../thirdparty/expat/xmltok.c"
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#include "../thirdparty/expat/xmlrole.c"
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#include "../thirdparty/expat/xmlparse.c"
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}}
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#ifdef OLD_BYTEORDER
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#undef BYTEORDER
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#define BYTEORDER = OLD_BYTEORDER
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#endif
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#ifdef __clang__
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#pragma clang diagnostic pop
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#endif
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#endif
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/// @endcond
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#endif // VSTGUI_ENABLE_XML_PARSER
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