1 | // ============================================================= // |
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2 | // // |
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3 | // File : MultiFileReader.cxx // |
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4 | // Purpose : Read multiple files like one concatenated file // |
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5 | // // |
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6 | // Coded by Ralf Westram (coder@reallysoft.de) in March 2014 // |
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7 | // http://www.arb-home.de/ // |
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8 | // // |
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9 | // ============================================================= // |
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10 | |
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11 | #include "MultiFileReader.h" |
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12 | #include "arb_msg.h" |
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13 | |
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14 | const string& MultiFileReader::getFilename() const { |
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15 | if (!reader) { |
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16 | if (last_reader) return last_reader->getFilename(); |
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17 | arb_assert(0); |
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18 | static string nf = "unknown-source"; |
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19 | return nf; |
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20 | } |
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21 | return reader->getFilename(); |
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22 | } |
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23 | bool MultiFileReader::getLine_intern(string& line) { |
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24 | bool gotLine = false; |
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25 | if (reader) { |
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26 | gotLine = reader->getLine(line); |
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27 | if (!gotLine) { |
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28 | nextReader(); |
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29 | gotLine = getLine_intern(line); |
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30 | if (gotLine) setLineNumber(reader->getLineNumber()); |
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31 | } |
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32 | } |
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33 | return gotLine; |
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34 | } |
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35 | |
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36 | FILE *MultiFileReader::open(int i) { |
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37 | FILE *in = fopen(files[i], "rt"); |
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38 | if (!in) error = new string(GB_IO_error("reading", files[i])); |
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39 | return in; |
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40 | } |
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41 | |
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42 | void MultiFileReader::nextReader() { |
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43 | if (reader) { |
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44 | if (last_reader) { |
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45 | delete last_reader; |
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46 | last_reader = NULp; |
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47 | } |
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48 | last_reader = reader; |
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49 | reader = NULp; |
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50 | } |
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51 | ++at; |
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52 | if (at<files.size()) { |
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53 | FILE *in = open(at); |
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54 | if (in) { |
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55 | reader = new BufferedFileReader(files[at], in); |
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56 | } |
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57 | } |
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58 | } |
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59 | |
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60 | MultiFileReader::MultiFileReader(const CharPtrArray& files_) : |
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61 | files(files_), |
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62 | reader(NULp), |
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63 | last_reader(NULp), |
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64 | error(NULp), |
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65 | at(-1) |
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66 | { |
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67 | for (size_t i = 0; i<files.size() && !error; ++i) { |
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68 | // test open all files |
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69 | FILE *in = open(i); |
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70 | if (in) fclose(in); |
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71 | } |
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72 | if (!error) nextReader(); |
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73 | } |
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74 | |
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75 | MultiFileReader::~MultiFileReader() { |
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76 | delete reader; |
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77 | delete last_reader; |
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78 | delete error; |
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79 | } |
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80 | |
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81 | // -------------------------------------------------------------------------------- |
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82 | |
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83 | #ifdef UNIT_TESTS |
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84 | #ifndef TEST_UNIT_H |
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85 | #include <test_unit.h> |
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86 | #endif |
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87 | |
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88 | void TEST_MultiFileReader() { |
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89 | ConstStrArray files; |
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90 | files.put("general/broken_LF.input"); // 6 lines |
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91 | files.put("general/dos.input"); // 6 lines |
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92 | files.put("general/mac.input"); // 6 lines |
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93 | files.put("general/empty.input"); // 1 line |
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94 | files.put("general/text.input"); // 6 lines |
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95 | |
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96 | { |
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97 | MultiFileReader reader(files); |
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98 | |
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99 | TEST_EXPECT_NO_ERROR(reader.get_error()); |
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100 | |
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101 | string line; |
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102 | string emptyLineError; |
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103 | string db_found_msgs; |
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104 | int lineCount = 0; |
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105 | int emptyLineCount = 0; |
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106 | |
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107 | while (reader.getLine(line)) { |
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108 | lineCount++; |
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109 | if (line.empty()) { |
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110 | emptyLineCount++; |
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111 | emptyLineError = reader.lineError("seen empty line"); |
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112 | } |
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113 | else if (strstr(line.c_str(), "database")) { |
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114 | db_found_msgs += reader.lineError("DB") + "\n"; |
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115 | } |
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116 | } |
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117 | |
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118 | TEST_EXPECT_NO_ERROR(reader.get_error()); |
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119 | TEST_EXPECT_EQUAL(lineCount, 25); |
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120 | TEST_EXPECT_EQUAL(emptyLineCount, 1); |
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121 | TEST_EXPECT_EQUAL(emptyLineError, "general/empty.input:1: seen empty line"); |
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122 | TEST_EXPECT_EQUAL(db_found_msgs, |
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123 | "general/broken_LF.input:2: DB\n" |
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124 | "general/dos.input:2: DB\n" |
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125 | "general/mac.input:2: DB\n" |
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126 | "general/text.input:2: DB\n"); |
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127 | } |
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128 | |
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129 | files.put("general/nosuch.input"); |
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130 | { |
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131 | MultiFileReader reader(files); |
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132 | TEST_EXPECT_EQUAL(reader.get_error(), "While reading 'general/nosuch.input': No such file or directory"); |
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133 | } |
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134 | } |
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135 | TEST_PUBLISH(TEST_MultiFileReader); |
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136 | |
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137 | #endif // UNIT_TESTS |
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138 | |
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139 | // -------------------------------------------------------------------------------- |
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140 | |
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