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      1 //===--- InputInfo.h - Input Source & Type Information ----------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #ifndef CLANG_LIB_DRIVER_INPUTINFO_H_
     11 #define CLANG_LIB_DRIVER_INPUTINFO_H_
     12 
     13 #include "clang/Driver/Types.h"
     14 
     15 #include <cassert>
     16 #include <string>
     17 
     18 namespace clang {
     19 namespace driver {
     20 
     21 /// InputInfo - Wrapper for information about an input source.
     22 class InputInfo {
     23   // FIXME: The distinction between filenames and inputarg here is
     24   // gross; we should probably drop the idea of a "linker
     25   // input". Doing so means tweaking pipelining to still create link
     26   // steps when it sees linker inputs (but not treat them as
     27   // arguments), and making sure that arguments get rendered
     28   // correctly.
     29   enum Class {
     30     Nothing,
     31     Filename,
     32     InputArg,
     33     Pipe
     34   };
     35 
     36   union {
     37     const char *Filename;
     38     const Arg *InputArg;
     39   } Data;
     40   Class Kind;
     41   types::ID Type;
     42   const char *BaseInput;
     43 
     44 public:
     45   InputInfo() {}
     46   InputInfo(types::ID _Type, const char *_BaseInput)
     47     : Kind(Nothing), Type(_Type), BaseInput(_BaseInput) {
     48   }
     49   InputInfo(const char *_Filename, types::ID _Type, const char *_BaseInput)
     50     : Kind(Filename), Type(_Type), BaseInput(_BaseInput) {
     51     Data.Filename = _Filename;
     52   }
     53   InputInfo(const Arg *_InputArg, types::ID _Type, const char *_BaseInput)
     54     : Kind(InputArg), Type(_Type), BaseInput(_BaseInput) {
     55     Data.InputArg = _InputArg;
     56   }
     57 
     58   bool isNothing() const { return Kind == Nothing; }
     59   bool isFilename() const { return Kind == Filename; }
     60   bool isInputArg() const { return Kind == InputArg; }
     61   types::ID getType() const { return Type; }
     62   const char *getBaseInput() const { return BaseInput; }
     63 
     64   const char *getFilename() const {
     65     assert(isFilename() && "Invalid accessor.");
     66     return Data.Filename;
     67   }
     68   const Arg &getInputArg() const {
     69     assert(isInputArg() && "Invalid accessor.");
     70     return *Data.InputArg;
     71   }
     72 
     73   /// getAsString - Return a string name for this input, for
     74   /// debugging.
     75   std::string getAsString() const {
     76     if (isFilename())
     77       return std::string("\"") + getFilename() + '"';
     78     else if (isInputArg())
     79       return "(input arg)";
     80     else
     81       return "(nothing)";
     82   }
     83 };
     84 
     85 } // end namespace driver
     86 } // end namespace clang
     87 
     88 #endif
     89