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1 //===--- InputInfo.h - Input Source & Type Information ----------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLVM_CLANG_LIB_DRIVER_INPUTINFO_H
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10 #define LLVM_CLANG_LIB_DRIVER_INPUTINFO_H
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11
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12 #include "clang/Driver/Action.h"
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13 #include "clang/Driver/Types.h"
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14 #include "llvm/Option/Arg.h"
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15 #include <cassert>
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16 #include <string>
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17
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18 namespace clang {
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19 namespace driver {
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20
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21 /// InputInfo - Wrapper for information about an input source.
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22 class InputInfo {
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23 // FIXME: The distinction between filenames and inputarg here is
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24 // gross; we should probably drop the idea of a "linker
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25 // input". Doing so means tweaking pipelining to still create link
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26 // steps when it sees linker inputs (but not treat them as
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27 // arguments), and making sure that arguments get rendered
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28 // correctly.
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29 enum Class {
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30 Nothing,
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31 Filename,
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32 InputArg,
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33 Pipe
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34 };
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35
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36 union {
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37 const char *Filename;
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38 const llvm::opt::Arg *InputArg;
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39 } Data;
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40 Class Kind;
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41 const Action* Act;
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42 types::ID Type;
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43 const char *BaseInput;
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44
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45 static types::ID GetActionType(const Action *A) {
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46 return A != nullptr ? A->getType() : types::TY_Nothing;
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47 }
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48
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49 public:
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50 InputInfo() : InputInfo(nullptr, nullptr) {}
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51 InputInfo(const Action *A, const char *_BaseInput)
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52 : Kind(Nothing), Act(A), Type(GetActionType(A)), BaseInput(_BaseInput) {}
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53
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54 InputInfo(types::ID _Type, const char *_Filename, const char *_BaseInput)
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55 : Kind(Filename), Act(nullptr), Type(_Type), BaseInput(_BaseInput) {
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56 Data.Filename = _Filename;
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57 }
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58 InputInfo(const Action *A, const char *_Filename, const char *_BaseInput)
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59 : Kind(Filename), Act(A), Type(GetActionType(A)), BaseInput(_BaseInput) {
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60 Data.Filename = _Filename;
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61 }
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62
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63 InputInfo(types::ID _Type, const llvm::opt::Arg *_InputArg,
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64 const char *_BaseInput)
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65 : Kind(InputArg), Act(nullptr), Type(_Type), BaseInput(_BaseInput) {
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66 Data.InputArg = _InputArg;
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67 }
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68 InputInfo(const Action *A, const llvm::opt::Arg *_InputArg,
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69 const char *_BaseInput)
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70 : Kind(InputArg), Act(A), Type(GetActionType(A)), BaseInput(_BaseInput) {
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71 Data.InputArg = _InputArg;
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72 }
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73
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74 bool isNothing() const { return Kind == Nothing; }
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75 bool isFilename() const { return Kind == Filename; }
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76 bool isInputArg() const { return Kind == InputArg; }
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77 types::ID getType() const { return Type; }
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78 const char *getBaseInput() const { return BaseInput; }
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79 /// The action for which this InputInfo was created. May be null.
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80 const Action *getAction() const { return Act; }
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81 void setAction(const Action *A) { Act = A; }
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82
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83 const char *getFilename() const {
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84 assert(isFilename() && "Invalid accessor.");
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85 return Data.Filename;
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86 }
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87 const llvm::opt::Arg &getInputArg() const {
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88 assert(isInputArg() && "Invalid accessor.");
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89 return *Data.InputArg;
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90 }
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91
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92 /// getAsString - Return a string name for this input, for
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93 /// debugging.
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94 std::string getAsString() const {
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95 if (isFilename())
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96 return std::string("\"") + getFilename() + '"';
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97 else if (isInputArg())
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98 return "(input arg)";
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99 else
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100 return "(nothing)";
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101 }
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102 };
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103
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104 } // end namespace driver
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105 } // end namespace clang
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106
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107 #endif
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