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
18namespace clang {
19namespace driver {
20
21/// InputInfo - Wrapper for information about an input source.
22class 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
44public:
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