1 //===--- DLangDemangle.cpp ------------------------------------------------===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
14 //===----------------------------------------------------------------------===//
41   /// \param Demangled Output buffer to write the demangled name.
53   /// \param Demangled output buffer to write the demangled name.
70   /// Extract the back reference position from a given string.
72   /// \param Mangled string to extract the back reference position.
83   /// Extract the symbol pointed by the back reference form a given string.
85   /// \param Mangled string to extract the back reference position.
96   /// \param Demangled output buffer to write the demangled name.
124   /// \param Demangled Output buffer to write the demangled name.
134   /// \param Demangled Output buffer to write the demangled name.
145   /// \param Demangled Output buffer to write the demangled name.
163   /// The index of the last back reference.
184     unsigned long Digit = Mangled[0] - '0';  in decodeNumber()
187     if (Val > (std::numeric_limits<unsigned int>::max() - Digit) / 10) {  in decodeNumber()
210   // Any identifier or non-basic type that has been emitted to the mangled  in decodeBackrefPos()
214   // Numbers in back references are encoded with base 26 by upper case letters  in decodeBackrefPos()
215   // A-Z for higher digits but lower case letters a-z for the last digit.  in decodeBackrefPos()
217   //        [a-z]  in decodeBackrefPos()
218   //        [A-Z] NumberBackRef  in decodeBackrefPos()
224     if (Val > (std::numeric_limits<unsigned long>::max() - 25) / 26)  in decodeBackrefPos()
230       Val += Mangled[0] - 'a';  in decodeBackrefPos()
238     Val += Mangled[0] - 'A';  in decodeBackrefPos()
249          "Invalid back reference!");  in decodeBackref()
262   if (RefPos > Qpos - Str.data()) {  in decodeBackref()
267   // Set the position of the back reference.  in decodeBackref()
268   Ret = Qpos - RefPos;  in decodeBackref()
275   // An identifier back reference always points to a digit 0 to 9.  in parseSymbolBackref()
281   // Get position of the back reference  in parseSymbolBackref()
301   // A type back reference always points to a letter.  in parseTypeBackref()
307   // bail as this may be a recursive back reference.  in parseTypeBackref()
308   if (Mangled.data() - Str.data() >= LastBackref) {  in parseTypeBackref()
314   LastBackref = Mangled.data() - Str.data();  in parseTypeBackref()
316   // Get position of the back reference.  in parseTypeBackref()
323   // Can't decode back reference.  in parseTypeBackref()
329   // TODO: Add support for function type back references.  in parseTypeBackref()
353   if (!Valid || Ret > Qref - Str.data())  in isSymbolName()
356   return std::isdigit(Qref[-Ret]);  in isSymbolName()
452     const size_t SuffixLen = Mangled.length() - Len;  in parseIdentifier()
489   // Back referenced type.  in parseType()
507       Demangled->prepend("initializer for ");  in parseLName()
508       Demangled->setCurrentPosition(Demangled->getCurrentPosition() - 1);  in parseLName()
514       Demangled->prepend("vtable for ");  in parseLName()
515       Demangled->setCurrentPosition(Demangled->getCurrentPosition() - 1);  in parseLName()
524       Demangled->prepend("ClassInfo for ");  in parseLName()
525       Demangled->setCurrentPosition(Demangled->getCurrentPosition() - 1);  in parseLName()
534       Demangled->prepend("Interface for ");  in parseLName()
535       Demangled->setCurrentPosition(Demangled->getCurrentPosition() - 1);  in parseLName()
544       Demangled->prepend("ModuleInfo for ");  in parseLName()
545       Demangled->setCurrentPosition(Demangled->getCurrentPosition() - 1);  in parseLName()
560   std::string_view M(this->Str);  in parseMangle()
588     Demangled.setCurrentPosition(Demangled.getCurrentPosition() - 1);  in dlangDemangle()