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annotate dep/fmt/test/gtest-extra.cc @ 349:7e97c566cce4

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services/kitsu: remove unused parameters in functions
author Paper <paper@paper.us.eu.org>
date Tue, 25 Jun 2024 16:27:38 -0400
parents 1faa72660932
children
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1 // Formatting library for C++ - custom Google Test assertions
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2 //
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3 // Copyright (c) 2012 - present, Victor Zverovich
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4 // All rights reserved.
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5 //
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6 // For the license information refer to format.h.
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7
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8 #include "gtest-extra.h"
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9
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10 #if FMT_USE_FCNTL
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11
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12 using fmt::file;
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13
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14 output_redirect::output_redirect(FILE* f, bool flush) : file_(f) {
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15 if (flush) this->flush();
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16 int fd = FMT_POSIX(fileno(f));
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17 // Create a file object referring to the original file.
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18 original_ = file::dup(fd);
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19 // Create a pipe.
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20 file write_end;
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21 file::pipe(read_end_, write_end);
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22 // Connect the passed FILE object to the write end of the pipe.
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23 write_end.dup2(fd);
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24 }
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25
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26 output_redirect::~output_redirect() noexcept {
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27 try {
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28 restore();
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29 } catch (const std::exception& e) {
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30 std::fputs(e.what(), stderr);
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31 }
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32 }
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33
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34 void output_redirect::flush() {
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35 int result = 0;
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36 do {
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37 result = fflush(file_);
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38 } while (result == EOF && errno == EINTR);
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39 if (result != 0) throw fmt::system_error(errno, "cannot flush stream");
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40 }
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41
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42 void output_redirect::restore() {
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43 if (original_.descriptor() == -1) return; // Already restored.
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44 flush();
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45 // Restore the original file.
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46 original_.dup2(FMT_POSIX(fileno(file_)));
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47 original_.close();
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48 }
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49
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50 std::string output_redirect::restore_and_read() {
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51 // Restore output.
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52 restore();
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53
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54 // Read everything from the pipe.
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55 std::string content;
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56 if (read_end_.descriptor() == -1) return content; // Already read.
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57 enum { BUFFER_SIZE = 4096 };
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58 char buffer[BUFFER_SIZE];
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59 size_t count = 0;
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60 do {
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61 count = read_end_.read(buffer, BUFFER_SIZE);
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62 content.append(buffer, count);
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63 } while (count != 0);
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64 read_end_.close();
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65 return content;
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66 }
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67
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68 std::string read(file& f, size_t count) {
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69 std::string buffer(count, '\0');
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70 size_t n = 0, offset = 0;
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71 do {
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72 n = f.read(&buffer[offset], count - offset);
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73 // We can't read more than size_t bytes since count has type size_t.
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74 offset += n;
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75 } while (offset < count && n != 0);
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76 buffer.resize(offset);
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77 return buffer;
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78 }
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79
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80 #endif // FMT_USE_FCNTL