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annotate lib/Support/system_error.cpp @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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1 //===---------------------- system_error.cpp ------------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This was lifted from libc++ and modified for C++03.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #include "llvm/Support/system_error.h"
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15 #include "llvm/Support/Errno.h"
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16 #include <cstring>
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17 #include <string>
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18
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19 namespace llvm {
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20
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21 // class error_category
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22
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23 error_category::error_category() {
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24 }
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25
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26 error_category::~error_category() {
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27 }
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28
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29 error_condition
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30 error_category::default_error_condition(int ev) const {
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31 return error_condition(ev, *this);
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32 }
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33
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34 bool
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35 error_category::equivalent(int code, const error_condition& condition) const {
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36 return default_error_condition(code) == condition;
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37 }
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38
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39 bool
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40 error_category::equivalent(const error_code& code, int condition) const {
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41 return *this == code.category() && code.value() == condition;
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42 }
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43
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44 std::string
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45 _do_message::message(int ev) const {
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46 return std::string(sys::StrError(ev));
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47 }
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48
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49 class _generic_error_category : public _do_message {
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50 public:
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51 virtual const char* name() const LLVM_OVERRIDE;
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52 virtual std::string message(int ev) const LLVM_OVERRIDE;
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53 };
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54
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55 const char*
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56 _generic_error_category::name() const {
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57 return "generic";
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58 }
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59
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60 std::string
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61 _generic_error_category::message(int ev) const {
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62 #ifdef ELAST
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63 if (ev > ELAST)
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64 return std::string("unspecified generic_category error");
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65 #endif // ELAST
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66 return _do_message::message(ev);
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67 }
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68
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69 const error_category&
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70 generic_category() {
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71 static _generic_error_category s;
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72 return s;
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73 }
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74
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75 class _system_error_category : public _do_message {
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76 public:
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77 virtual const char* name() const LLVM_OVERRIDE;
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78 virtual std::string message(int ev) const LLVM_OVERRIDE;
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79 virtual error_condition default_error_condition(int ev) const LLVM_OVERRIDE;
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80 };
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81
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82 const char*
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83 _system_error_category::name() const {
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84 return "system";
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85 }
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86
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87 // std::string _system_error_category::message(int ev) const {
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88 // Is in Platform/system_error.inc
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89
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90 // error_condition _system_error_category::default_error_condition(int ev) const
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91 // Is in Platform/system_error.inc
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92
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93 const error_category&
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94 system_category() {
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95 static _system_error_category s;
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96 return s;
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97 }
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98
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99 const error_category&
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100 posix_category() {
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101 #ifdef LLVM_ON_WIN32
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102 return generic_category();
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103 #else
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104 return system_category();
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105 #endif
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106 }
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107
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108 // error_condition
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109
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110 std::string
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111 error_condition::message() const {
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112 return _cat_->message(_val_);
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113 }
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114
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115 // error_code
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116
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117 std::string
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118 error_code::message() const {
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119 return _cat_->message(_val_);
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120 }
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121
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122 } // end namespace llvm
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123
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124 // Include the truly platform-specific parts of this class.
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125 #if defined(LLVM_ON_UNIX)
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126 #include "Unix/system_error.inc"
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127 #endif
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128 #if defined(LLVM_ON_WIN32)
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129 #include "Windows/system_error.inc"
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130 #endif