- fbx: parser working now. Drop shared_ptr's in favour of raw pointers to reduce memory overhead (a pity - I want unique_ptr and move semantics in C++03).
Alexander Gessler
parent
ff995307ac
commit
c9d9fcdfd1
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@ -53,6 +53,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "FBXTokenizer.h"
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#include "FBXParser.h"
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#include "FBXUtil.h"
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#include "StreamReader.h"
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#include "MemoryIOWrapper.h"
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@ -148,11 +149,17 @@ void FBXImporter::InternReadFile( const std::string& pFile,
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// broadphase tokenizing pass in which we identify the core
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// syntax elements of FBX (brackets, commas, key:value mappings)
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TokenList tokens;
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Tokenize(tokens,begin);
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try {
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Tokenize(tokens,begin);
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// use this information to construct a very rudimentary
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// parse-tree representing the FBX scope structure
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Parser parser(tokens);
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// use this information to construct a very rudimentary
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// parse-tree representing the FBX scope structure
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Parser parser(tokens);
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}
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catch(...) {
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std::for_each(tokens.begin(),tokens.end(),Util::delete_fun<Token>());
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throw;
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}
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}
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#endif // !ASSIMP_BUILD_NO_FBX_IMPORTER
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@ -47,38 +47,107 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "FBXTokenizer.h"
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#include "FBXParser.h"
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#include "FBXUtil.h"
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using namespace Assimp;
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using namespace Assimp::FBX;
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namespace Assimp {
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template<> const std::string LogFunctions<Assimp::FBX::Parser>::log_prefix = "FBX-Parse: ";
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namespace {
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// ------------------------------------------------------------------------------------------------
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// signal parsing error, this is always unrecoverable. Throws DeadlyImportError.
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void ParseError(const std::string& message, TokenPtr token)
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{
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throw DeadlyImportError(token ? Util::AddTokenText("FBX-Parse",message,token) : ("FBX-Parse " + message));
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}
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}
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// ------------------------------------------------------------------------------------------------
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Element::Element(Parser& parser)
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{
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TokenPtr n = NULL;
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do {
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n = parser.AdvanceToNextToken();
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if(!n) {
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ParseError("unexpected end of file, expected closing bracket",parser.LastToken());
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}
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if (n->Type() == TokenType_DATA) {
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tokens.push_back(n);
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n = parser.AdvanceToNextToken();
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if(!n) {
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ParseError("unexpected end of file, expected bracket, comma or key",parser.LastToken());
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}
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const TokenType ty = n->Type();
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if (ty != TokenType_OPEN_BRACKET && ty != TokenType_CLOSE_BRACKET && ty != TokenType_COMMA && ty != TokenType_KEY) {
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ParseError("unexpected token; expected bracket, comma or key",n);
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}
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}
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if (n->Type() == TokenType_OPEN_BRACKET) {
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compound.reset(new Scope(parser));
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// compound scopes must appear at the end of an element, so TOK_CLOSE_BRACKET should be next
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n = parser.CurrentToken();
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ai_assert(n);
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if (n->Type() != TokenType_CLOSE_BRACKET) {
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ParseError("expected closing bracket",n);
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}
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}
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}
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while(n->Type() != TokenType_KEY);
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}
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// ------------------------------------------------------------------------------------------------
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Element::~Element()
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{
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std::for_each(tokens.begin(),tokens.end(),Util::delete_fun<Token>());
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}
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// ------------------------------------------------------------------------------------------------
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Scope::Scope(Parser& parser)
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Scope::Scope(Parser& parser,bool topLevel)
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{
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TokenPtr t = parser.GetNextToken();
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if (t->Type() != TokenType_OPEN_BRACKET) {
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parser.ThrowException("Expected open bracket");
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if(!topLevel) {
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TokenPtr t = parser.CurrentToken();
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if (t->Type() != TokenType_OPEN_BRACKET) {
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ParseError("expected open bracket",t);
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}
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}
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// XXX parse members
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TokenPtr n = parser.AdvanceToNextToken();
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if(n == NULL) {
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ParseError("unexpected end of file",NULL);
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}
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do {
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if (n->Type() != TokenType_KEY) {
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ParseError("unexpected token, expected TOK_KEY",n);
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}
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elements.insert(ElementMap::value_type(n->StringContents(),new_Element(parser)));
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// Element() should stop at the next Key (or Close) token
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n = parser.CurrentToken();
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if(n == NULL) {
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if (topLevel) {
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return;
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}
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ParseError("unexpected end of file",parser.LastToken());
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}
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}
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while(n->Type() != TokenType_CLOSE_BRACKET);
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}
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// ------------------------------------------------------------------------------------------------
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Scope::~Scope()
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{
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BOOST_FOREACH(ElementMap::value_type& v, elements) {
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delete v.second;
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}
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}
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@ -86,8 +155,10 @@ Scope::~Scope()
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Parser::Parser (const TokenList& tokens)
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: tokens(tokens)
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, cursor(tokens.begin())
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, current()
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, last()
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{
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root = boost::scoped_ptr<Scope>(new Scope(*this));
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root.reset(new Scope(*this,true));
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}
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@ -98,24 +169,30 @@ Parser::~Parser()
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// ------------------------------------------------------------------------------------------------
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TokenPtr Parser::GetNextToken()
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TokenPtr Parser::AdvanceToNextToken()
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{
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last = current;
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if (cursor == tokens.end()) {
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return TokenPtr(NULL);
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current = NULL;
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}
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return *cursor++;
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else {
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current = *cursor++;
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}
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return current;
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}
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// ------------------------------------------------------------------------------------------------
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TokenPtr Parser::PeekNextToken()
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TokenPtr Parser::CurrentToken() const
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{
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if (cursor == tokens.end()) {
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return TokenPtr(NULL);
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}
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return current;
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}
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return *cursor;
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// ------------------------------------------------------------------------------------------------
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TokenPtr Parser::LastToken() const
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{
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return last;
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}
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@ -62,10 +62,12 @@ namespace FBX {
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class Parser;
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class Element;
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// should actually use 0x's unique_ptr for some of those
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typedef std::vector< boost::shared_ptr<Scope> > ScopeList;
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typedef std::fbx_unordered_multimap< std::string, boost::shared_ptr<Element> > ElementMap;
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// XXX should use C++11's unique_ptr - but assimp's need to keep working with 03
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typedef std::vector< Scope* > ScopeList;
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typedef std::fbx_unordered_multimap< std::string, Element* > ElementMap;
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# define new_Scope new Scope
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# define new_Element new Element
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/** FBX data entity that consists of a key:value tuple.
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@ -100,7 +102,7 @@ private:
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std::string key;
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TokenList tokens;
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boost::shared_ptr<Scope> compound;
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boost::scoped_ptr<Scope> compound;
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};
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@ -121,7 +123,7 @@ class Scope
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public:
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Scope(Parser& parser);
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Scope(Parser& parser, bool topLevel = false);
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~Scope();
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public:
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@ -138,7 +140,7 @@ private:
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/** FBX parsing class, takes a list of input tokens and generates a hierarchy
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* of nested #Scope instances, representing the fbx DOM.*/
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class Parser : public LogFunctions<Parser>
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class Parser
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{
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public:
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@ -156,13 +158,16 @@ private:
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friend class Scope;
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friend class Element;
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TokenPtr GetNextToken();
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TokenPtr PeekNextToken();
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TokenPtr AdvanceToNextToken();
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TokenPtr LastToken() const;
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TokenPtr CurrentToken() const;
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private:
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const TokenList& tokens;
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TokenPtr last, current;
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TokenList::const_iterator cursor;
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boost::scoped_ptr<Scope> root;
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};
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@ -60,6 +60,9 @@ Token::Token(const char* sbegin, const char* send, TokenType type, unsigned int
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, type(type)
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, line(line)
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, column(column)
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#ifdef DEBUG
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, contents(sbegin, static_cast<size_t>(send-sbegin))
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#endif
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{
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ai_assert(sbegin);
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ai_assert(send);
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@ -74,23 +77,45 @@ Token::~Token()
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namespace {
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// ------------------------------------------------------------------------------------------------
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// signal tokenization error, this is always unrecoverable. Throws DeadlyImportError.
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void TokenizeError(const std::string& message, unsigned int line, unsigned int column)
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{
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throw DeadlyImportError(Util::AddLineAndColumn("FBX-Tokenize",message,line,column));
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}
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// process a potential data token up to 'cur', adding it to 'output_tokens'.
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// ------------------------------------------------------------------------------------------------
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void ProcessDataToken( TokenList& output_tokens, const char*& start, const char*& end,
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unsigned int line,
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unsigned int column,
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TokenType type = TokenType_DATA)
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TokenType type = TokenType_DATA,
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bool must_have_token = false)
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{
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if (start != end) {
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// tokens should have no whitespace in them and [start,end] should
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if (start && end) {
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// sanity check:
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// tokens should have no whitespace outside quoted text and [start,end] should
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// properly delimit the valid range.
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for (const char* c = start; c != end; ++c) {
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if (IsSpaceOrNewLine(*c)) {
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throw DeadlyImportError(Util::AddLineAndColumn("FBX-Tokenize","unexpected whitespace in token",line,column));
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bool in_double_quotes = false;
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for (const char* c = start; c != end + 1; ++c) {
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if (*c == '\"') {
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in_double_quotes = !in_double_quotes;
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}
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if (!in_double_quotes && IsSpaceOrNewLine(*c)) {
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TokenizeError("unexpected whitespace in token", line, column);
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}
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}
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output_tokens.push_back(boost::make_shared<Token>(start,end,type,line,column));
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if (in_double_quotes) {
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TokenizeError("non-terminated double quotes", line, column);
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}
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output_tokens.push_back(new_Token(start,end + 1,type,line,column));
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}
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else if (must_have_token) {
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TokenizeError("unexpected character, expected data token", line, column);
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}
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start = end = NULL;
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@ -109,6 +134,7 @@ void Tokenize(TokenList& output_tokens, const char* input)
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bool comment = false;
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bool in_double_quotes = false;
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bool pending_data_token = false;
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const char* token_begin = NULL, *token_end = NULL;
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for (const char* cur = input;*cur;++cur,++column) {
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@ -119,8 +145,6 @@ void Tokenize(TokenList& output_tokens, const char* input)
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column = 0;
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++line;
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continue;
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}
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if(comment) {
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@ -131,9 +155,9 @@ void Tokenize(TokenList& output_tokens, const char* input)
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if (c == '\"') {
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in_double_quotes = false;
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token_end = cur;
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if (!token_begin) {
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token_begin = cur;
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}
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ProcessDataToken(output_tokens,token_begin,token_end,line,column);
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pending_data_token = false;
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}
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continue;
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}
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@ -141,6 +165,10 @@ void Tokenize(TokenList& output_tokens, const char* input)
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switch(c)
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{
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case '\"':
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if (token_begin) {
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TokenizeError("unexpected double-quote", line, column);
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}
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token_begin = cur;
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in_double_quotes = true;
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continue;
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@ -151,29 +179,57 @@ void Tokenize(TokenList& output_tokens, const char* input)
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case '{':
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ProcessDataToken(output_tokens,token_begin,token_end, line, column);
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output_tokens.push_back(boost::make_shared<Token>(cur,cur+1,TokenType_OPEN_BRACKET,line,column));
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break;
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output_tokens.push_back(new_Token(cur,cur+1,TokenType_OPEN_BRACKET,line,column));
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continue;
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case '}':
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ProcessDataToken(output_tokens,token_begin,token_end,line,column);
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output_tokens.push_back(boost::make_shared<Token>(cur,cur+1,TokenType_CLOSE_BRACKET,line,column));
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break;
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output_tokens.push_back(new_Token(cur,cur+1,TokenType_CLOSE_BRACKET,line,column));
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continue;
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case ',':
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ProcessDataToken(output_tokens,token_begin,token_end,line,column);
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output_tokens.push_back(boost::make_shared<Token>(cur,cur+1,TokenType_COMMA,line,column));
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break;
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if (pending_data_token) {
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ProcessDataToken(output_tokens,token_begin,token_end,line,column,TokenType_DATA,true);
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}
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output_tokens.push_back(new_Token(cur,cur+1,TokenType_COMMA,line,column));
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continue;
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case ':':
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ProcessDataToken(output_tokens,token_begin,token_end,line,column, TokenType_KEY);
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break;
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if (pending_data_token) {
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ProcessDataToken(output_tokens,token_begin,token_end,line,column,TokenType_KEY,true);
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}
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else {
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TokenizeError("unexpected colon", line, column);
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}
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continue;
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}
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if (!IsSpaceOrNewLine(c)) {
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if (IsSpaceOrNewLine(c)) {
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if (token_begin) {
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// peek ahead and check if the next token is a colon in which
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// case this counts as KEY token.
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TokenType type = TokenType_DATA;
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for (const char* peek = cur; *peek && IsSpaceOrNewLine(*peek); ++peek) {
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if (*peek == ':') {
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type = TokenType_KEY;
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cur = peek;
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break;
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}
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}
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ProcessDataToken(output_tokens,token_begin,token_end,line,column,type);
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}
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pending_data_token = false;
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}
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else {
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token_end = cur;
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if (!token_begin) {
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token_begin = cur;
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}
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pending_data_token = true;
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}
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}
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}
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@ -85,6 +85,12 @@ public:
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Token(const char* sbegin, const char* send, TokenType type, unsigned int line, unsigned int column);
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~Token();
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public:
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std::string StringContents() const {
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return std::string(begin(),end());
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}
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public:
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const char* begin() const {
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@ -99,8 +105,23 @@ public:
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return type;
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}
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unsigned int Line() const {
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return line;
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}
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unsigned int Column() const {
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return column;
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}
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private:
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#ifdef DEBUG
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// full string copy for the sole purpose that it nicely appears
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// in msvc's debugger window.
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const std::string contents;
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#endif
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const char* const sbegin;
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const char* const send;
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const TokenType type;
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@ -108,9 +129,11 @@ private:
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const unsigned int line, column;
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};
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// XXX should use C++11's unique_ptr - but assimp's need to keep working with 03
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typedef const Token* TokenPtr;
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typedef std::vector< TokenPtr > TokenList;
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typedef boost::shared_ptr<Token> TokenPtr;
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typedef std::vector< boost::shared_ptr<Token> > TokenList;
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#define new_Token new Token
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/** Main FBX tokenizer function. Transform input buffer into a list of preprocessed tokens.
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@ -44,6 +44,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "AssimpPCH.h"
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#include "FBXUtil.h"
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#include "FBXTokenizer.h"
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#include "TinyFormatter.h"
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#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
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@ -52,12 +54,47 @@ namespace Assimp {
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namespace FBX {
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namespace Util {
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// ------------------------------------------------------------------------------------------------
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const char* TokenTypeString(TokenType t)
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{
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switch(t) {
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case TokenType_OPEN_BRACKET:
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return "TOK_OPEN_BRACKET";
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case TokenType_CLOSE_BRACKET:
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return "TOK_CLOSE_BRACKET";
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case TokenType_DATA:
|
||||
return "TOK_DATA";
|
||||
|
||||
case TokenType_COMMA:
|
||||
return "TOK_COMMA";
|
||||
|
||||
case TokenType_KEY:
|
||||
return "TOK_KEY";
|
||||
}
|
||||
|
||||
ai_assert(false);
|
||||
return "";
|
||||
}
|
||||
|
||||
|
||||
// ------------------------------------------------------------------------------------------------
|
||||
std::string AddLineAndColumn(const std::string& prefix, const std::string& text, unsigned int line, unsigned int column)
|
||||
{
|
||||
return static_cast<std::string>( (Formatter::format(),prefix,"(line ",line,", col ",column,") ",text) );
|
||||
}
|
||||
|
||||
// ------------------------------------------------------------------------------------------------
|
||||
std::string AddTokenText(const std::string& prefix, const std::string& text, const Token* tok)
|
||||
{
|
||||
return static_cast<std::string>( (Formatter::format(),prefix,
|
||||
"(",TokenTypeString(tok->Type()),
|
||||
"line ",tok->Line(),
|
||||
", col ",tok->Column(),") ",
|
||||
text) );
|
||||
}
|
||||
|
||||
} // !Util
|
||||
} // !FBX
|
||||
} // !Assimp
|
||||
|
|
|
|||
|
|
@ -49,8 +49,26 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|||
|
||||
namespace Assimp {
|
||||
namespace FBX {
|
||||
|
||||
class Token;
|
||||
enum TokenType;
|
||||
|
||||
namespace Util {
|
||||
|
||||
|
||||
/** helper for std::for_each to delete all heap-allocated items in a container */
|
||||
template<typename T>
|
||||
struct delete_fun
|
||||
{
|
||||
void operator()(const volatile T* del) {
|
||||
delete del;
|
||||
}
|
||||
};
|
||||
|
||||
/** Get a string representation for a #TokenType. */
|
||||
const char* TokenTypeString(TokenType t);
|
||||
|
||||
|
||||
/** Format log/error messages using a given line location in the source file.
|
||||
*
|
||||
* @param prefix Message prefix to be preprended to the location info.
|
||||
|
|
@ -60,6 +78,15 @@ namespace Util {
|
|||
* @return A string of the following format: {prefix} (line {line}, col {column}) {text}*/
|
||||
std::string AddLineAndColumn(const std::string& prefix, const std::string& text, unsigned int line, unsigned int column);
|
||||
|
||||
|
||||
/** Format log/error messages using a given cursor token.
|
||||
*
|
||||
* @param prefix Message prefix to be preprended to the location info.
|
||||
* @param text Message text
|
||||
* @param tok Token where parsing/processing stopped
|
||||
* @return A string of the following format: {prefix} ({token-type}, line {line}, col {column}) {text}*/
|
||||
std::string AddTokenText(const std::string& prefix, const std::string& text, const Token* tok);
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1484,6 +1484,14 @@
|
|||
CompileAs="1"
|
||||
/>
|
||||
</FileConfiguration>
|
||||
<FileConfiguration
|
||||
Name="debug-noboost-st|Win32"
|
||||
ExcludedFromBuild="true"
|
||||
>
|
||||
<Tool
|
||||
Name="VCCLCompilerTool"
|
||||
/>
|
||||
</FileConfiguration>
|
||||
</File>
|
||||
</Filter>
|
||||
</Filter>
|
||||
|
|
|
|||
Loading…
Reference in New Issue