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annotate lib/Support/FileUtilities.cpp @ 3:9ad51c7bc036

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author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Wed, 15 May 2013 06:43:32 +0900
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1 //===- Support/FileUtilities.cpp - File System Utilities ------------------===//
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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 file implements a family of utility functions which are useful for doing
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11 // various things with files.
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12 //
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13 //===----------------------------------------------------------------------===//
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14
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15 #include "llvm/Support/FileUtilities.h"
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16 #include "llvm/ADT/OwningPtr.h"
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17 #include "llvm/ADT/SmallString.h"
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18 #include "llvm/Support/MemoryBuffer.h"
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19 #include "llvm/Support/Path.h"
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20 #include "llvm/Support/raw_ostream.h"
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21 #include "llvm/Support/system_error.h"
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22 #include <cctype>
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23 #include <cstdlib>
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24 #include <cstring>
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25 using namespace llvm;
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26
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27 static bool isSignedChar(char C) {
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28 return (C == '+' || C == '-');
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29 }
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30
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31 static bool isExponentChar(char C) {
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32 switch (C) {
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33 case 'D': // Strange exponential notation.
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34 case 'd': // Strange exponential notation.
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35 case 'e':
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36 case 'E': return true;
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37 default: return false;
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38 }
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39 }
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40
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41 static bool isNumberChar(char C) {
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42 switch (C) {
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43 case '0': case '1': case '2': case '3': case '4':
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44 case '5': case '6': case '7': case '8': case '9':
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45 case '.': return true;
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46 default: return isSignedChar(C) || isExponentChar(C);
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47 }
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48 }
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49
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50 static const char *BackupNumber(const char *Pos, const char *FirstChar) {
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51 // If we didn't stop in the middle of a number, don't backup.
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52 if (!isNumberChar(*Pos)) return Pos;
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53
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54 // Otherwise, return to the start of the number.
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55 bool HasPeriod = false;
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56 while (Pos > FirstChar && isNumberChar(Pos[-1])) {
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57 // Backup over at most one period.
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58 if (Pos[-1] == '.') {
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59 if (HasPeriod)
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60 break;
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61 HasPeriod = true;
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62 }
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63
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64 --Pos;
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65 if (Pos > FirstChar && isSignedChar(Pos[0]) && !isExponentChar(Pos[-1]))
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66 break;
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67 }
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68 return Pos;
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69 }
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70
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71 /// EndOfNumber - Return the first character that is not part of the specified
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72 /// number. This assumes that the buffer is null terminated, so it won't fall
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73 /// off the end.
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74 static const char *EndOfNumber(const char *Pos) {
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75 while (isNumberChar(*Pos))
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76 ++Pos;
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77 return Pos;
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78 }
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79
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80 /// CompareNumbers - compare two numbers, returning true if they are different.
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81 static bool CompareNumbers(const char *&F1P, const char *&F2P,
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82 const char *F1End, const char *F2End,
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83 double AbsTolerance, double RelTolerance,
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84 std::string *ErrorMsg) {
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85 const char *F1NumEnd, *F2NumEnd;
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86 double V1 = 0.0, V2 = 0.0;
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87
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88 // If one of the positions is at a space and the other isn't, chomp up 'til
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89 // the end of the space.
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90 while (isspace(static_cast<unsigned char>(*F1P)) && F1P != F1End)
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91 ++F1P;
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92 while (isspace(static_cast<unsigned char>(*F2P)) && F2P != F2End)
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93 ++F2P;
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94
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95 // If we stop on numbers, compare their difference.
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96 if (!isNumberChar(*F1P) || !isNumberChar(*F2P)) {
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97 // The diff failed.
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98 F1NumEnd = F1P;
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99 F2NumEnd = F2P;
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100 } else {
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101 // Note that some ugliness is built into this to permit support for numbers
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102 // that use "D" or "d" as their exponential marker, e.g. "1.234D45". This
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103 // occurs in 200.sixtrack in spec2k.
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104 V1 = strtod(F1P, const_cast<char**>(&F1NumEnd));
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105 V2 = strtod(F2P, const_cast<char**>(&F2NumEnd));
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106
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107 if (*F1NumEnd == 'D' || *F1NumEnd == 'd') {
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108 // Copy string into tmp buffer to replace the 'D' with an 'e'.
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109 SmallString<200> StrTmp(F1P, EndOfNumber(F1NumEnd)+1);
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110 // Strange exponential notation!
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111 StrTmp[static_cast<unsigned>(F1NumEnd-F1P)] = 'e';
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112
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113 V1 = strtod(&StrTmp[0], const_cast<char**>(&F1NumEnd));
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114 F1NumEnd = F1P + (F1NumEnd-&StrTmp[0]);
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115 }
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116
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117 if (*F2NumEnd == 'D' || *F2NumEnd == 'd') {
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parents:
diff changeset
118 // Copy string into tmp buffer to replace the 'D' with an 'e'.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
119 SmallString<200> StrTmp(F2P, EndOfNumber(F2NumEnd)+1);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
120 // Strange exponential notation!
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
121 StrTmp[static_cast<unsigned>(F2NumEnd-F2P)] = 'e';
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
122
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
123 V2 = strtod(&StrTmp[0], const_cast<char**>(&F2NumEnd));
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
124 F2NumEnd = F2P + (F2NumEnd-&StrTmp[0]);
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
125 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
126 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
127
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
128 if (F1NumEnd == F1P || F2NumEnd == F2P) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
129 if (ErrorMsg) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
130 *ErrorMsg = "FP Comparison failed, not a numeric difference between '";
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
131 *ErrorMsg += F1P[0];
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
132 *ErrorMsg += "' and '";
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
133 *ErrorMsg += F2P[0];
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
134 *ErrorMsg += "'";
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
135 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
136 return true;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
137 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
138
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
139 // Check to see if these are inside the absolute tolerance
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
140 if (AbsTolerance < std::abs(V1-V2)) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
141 // Nope, check the relative tolerance...
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
142 double Diff;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
143 if (V2)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
144 Diff = std::abs(V1/V2 - 1.0);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
145 else if (V1)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
146 Diff = std::abs(V2/V1 - 1.0);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
147 else
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
148 Diff = 0; // Both zero.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
149 if (Diff > RelTolerance) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
150 if (ErrorMsg) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
151 raw_string_ostream(*ErrorMsg)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
152 << "Compared: " << V1 << " and " << V2 << '\n'
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
153 << "abs. diff = " << std::abs(V1-V2) << " rel.diff = " << Diff << '\n'
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
154 << "Out of tolerance: rel/abs: " << RelTolerance << '/'
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
155 << AbsTolerance;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
156 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
157 return true;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
158 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
159 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
160
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
161 // Otherwise, advance our read pointers to the end of the numbers.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
162 F1P = F1NumEnd; F2P = F2NumEnd;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
163 return false;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
164 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
165
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
166 /// DiffFilesWithTolerance - Compare the two files specified, returning 0 if the
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
167 /// files match, 1 if they are different, and 2 if there is a file error. This
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
168 /// function differs from DiffFiles in that you can specify an absolete and
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
169 /// relative FP error that is allowed to exist. If you specify a string to fill
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
170 /// in for the error option, it will set the string to an error message if an
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
171 /// error occurs, allowing the caller to distinguish between a failed diff and a
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
172 /// file system error.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
173 ///
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
174 int llvm::DiffFilesWithTolerance(const sys::PathWithStatus &FileA,
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
175 const sys::PathWithStatus &FileB,
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
176 double AbsTol, double RelTol,
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
177 std::string *Error) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
178 const sys::FileStatus *FileAStat = FileA.getFileStatus(false, Error);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
179 if (!FileAStat)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
180 return 2;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
181 const sys::FileStatus *FileBStat = FileB.getFileStatus(false, Error);
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
182 if (!FileBStat)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
183 return 2;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
184
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
185 // Check for zero length files because some systems croak when you try to
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
186 // mmap an empty file.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
187 size_t A_size = FileAStat->getSize();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
188 size_t B_size = FileBStat->getSize();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
189
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
190 // If they are both zero sized then they're the same
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
191 if (A_size == 0 && B_size == 0)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
192 return 0;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
193
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
194 // If only one of them is zero sized then they can't be the same
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
195 if ((A_size == 0 || B_size == 0)) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
196 if (Error)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
197 *Error = "Files differ: one is zero-sized, the other isn't";
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
198 return 1;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
199 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
200
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
201 // Now its safe to mmap the files into memory because both files
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
202 // have a non-zero size.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
203 OwningPtr<MemoryBuffer> F1;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
204 if (error_code ec = MemoryBuffer::getFile(FileA.c_str(), F1)) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
205 if (Error)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
206 *Error = ec.message();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
207 return 2;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
208 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
209 OwningPtr<MemoryBuffer> F2;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
210 if (error_code ec = MemoryBuffer::getFile(FileB.c_str(), F2)) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
211 if (Error)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
212 *Error = ec.message();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
213 return 2;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
214 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
215
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
216 // Okay, now that we opened the files, scan them for the first difference.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
217 const char *File1Start = F1->getBufferStart();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
218 const char *File2Start = F2->getBufferStart();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
219 const char *File1End = F1->getBufferEnd();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
220 const char *File2End = F2->getBufferEnd();
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
221 const char *F1P = File1Start;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
222 const char *F2P = File2Start;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
223
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
224 // Are the buffers identical? Common case: Handle this efficiently.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
225 if (A_size == B_size &&
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
226 std::memcmp(File1Start, File2Start, A_size) == 0)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
227 return 0;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
228
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
229 // Otherwise, we are done a tolerances are set.
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
230 if (AbsTol == 0 && RelTol == 0) {
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
231 if (Error)
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
232 *Error = "Files differ without tolerance allowance";
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
233 return 1; // Files different!
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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234 }
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
235
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
236 bool CompareFailed = false;
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff changeset
237 while (1) {
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238 // Scan for the end of file or next difference.
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239 while (F1P < File1End && F2P < File2End && *F1P == *F2P)
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240 ++F1P, ++F2P;
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241
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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diff changeset
242 if (F1P >= File1End || F2P >= File2End) break;
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243
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244 // Okay, we must have found a difference. Backup to the start of the
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245 // current number each stream is at so that we can compare from the
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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246 // beginning.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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247 F1P = BackupNumber(F1P, File1Start);
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248 F2P = BackupNumber(F2P, File2Start);
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249
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250 // Now that we are at the start of the numbers, compare them, exiting if
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parents:
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251 // they don't match.
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252 if (CompareNumbers(F1P, F2P, File1End, File2End, AbsTol, RelTol, Error)) {
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253 CompareFailed = true;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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254 break;
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255 }
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256 }
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257
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258 // Okay, we reached the end of file. If both files are at the end, we
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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259 // succeeded.
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260 bool F1AtEnd = F1P >= File1End;
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261 bool F2AtEnd = F2P >= File2End;
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262 if (!CompareFailed && (!F1AtEnd || !F2AtEnd)) {
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263 // Else, we might have run off the end due to a number: backup and retry.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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264 if (F1AtEnd && isNumberChar(F1P[-1])) --F1P;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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265 if (F2AtEnd && isNumberChar(F2P[-1])) --F2P;
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266 F1P = BackupNumber(F1P, File1Start);
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267 F2P = BackupNumber(F2P, File2Start);
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268
9ad51c7bc036 1st commit. remove git dir and add all files.
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269 // Now that we are at the start of the numbers, compare them, exiting if
9ad51c7bc036 1st commit. remove git dir and add all files.
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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270 // they don't match.
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parents:
diff changeset
271 if (CompareNumbers(F1P, F2P, File1End, File2End, AbsTol, RelTol, Error))
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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272 CompareFailed = true;
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parents:
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273
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parents:
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274 // If we found the end, we succeeded.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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275 if (F1P < File1End || F2P < File2End)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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276 CompareFailed = true;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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277 }
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parents:
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278
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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279 return CompareFailed;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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280 }