1 // Protocol Buffers - Google's data interchange format 2 // Copyright 2008 Google Inc. All rights reserved. 3 // http://code.google.com/p/protobuf/ 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are 7 // met: 8 // 9 // * Redistributions of source code must retain the above copyright 10 // notice, this list of conditions and the following disclaimer. 11 // * Redistributions in binary form must reproduce the above 12 // copyright notice, this list of conditions and the following disclaimer 13 // in the documentation and/or other materials provided with the 14 // distribution. 15 // * Neither the name of Google Inc. nor the names of its 16 // contributors may be used to endorse or promote products derived from 17 // this software without specific prior written permission. 18 // 19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 // Author: kenton (at) google.com (Kenton Varda) 32 // emulates google3/file/base/file.cc 33 34 #include <google/protobuf/testing/file.h> 35 #include <stdio.h> 36 #include <sys/stat.h> 37 #include <sys/types.h> 38 #ifdef _MSC_VER 39 #define WIN32_LEAN_AND_MEAN // yeah, right 40 #include <windows.h> // Find*File(). :( 41 #include <io.h> 42 #include <direct.h> 43 #else 44 #include <dirent.h> 45 #include <unistd.h> 46 #endif 47 #include <errno.h> 48 49 namespace google { 50 namespace protobuf { 51 52 #ifdef _WIN32 53 #define mkdir(name, mode) mkdir(name) 54 // Windows doesn't have symbolic links. 55 #define lstat stat 56 #ifndef F_OK 57 #define F_OK 00 // not defined by MSVC for whatever reason 58 #endif 59 #endif 60 61 bool File::Exists(const string& name) { 62 return access(name.c_str(), F_OK) == 0; 63 } 64 65 bool File::ReadFileToString(const string& name, string* output) { 66 char buffer[1024]; 67 FILE* file = fopen(name.c_str(), "rb"); 68 if (file == NULL) return false; 69 70 while (true) { 71 size_t n = fread(buffer, 1, sizeof(buffer), file); 72 if (n <= 0) break; 73 output->append(buffer, n); 74 } 75 76 int error = ferror(file); 77 if (fclose(file) != 0) return false; 78 return error == 0; 79 } 80 81 void File::ReadFileToStringOrDie(const string& name, string* output) { 82 GOOGLE_CHECK(ReadFileToString(name, output)) << "Could not read: " << name; 83 } 84 85 void File::WriteStringToFileOrDie(const string& contents, const string& name) { 86 FILE* file = fopen(name.c_str(), "wb"); 87 GOOGLE_CHECK(file != NULL) 88 << "fopen(" << name << ", \"wb\"): " << strerror(errno); 89 GOOGLE_CHECK_EQ(fwrite(contents.data(), 1, contents.size(), file), 90 contents.size()) 91 << "fwrite(" << name << "): " << strerror(errno); 92 GOOGLE_CHECK(fclose(file) == 0) 93 << "fclose(" << name << "): " << strerror(errno); 94 } 95 96 bool File::CreateDir(const string& name, int mode) { 97 return mkdir(name.c_str(), mode) == 0; 98 } 99 100 bool File::RecursivelyCreateDir(const string& path, int mode) { 101 if (CreateDir(path, mode)) return true; 102 103 if (Exists(path)) return false; 104 105 // Try creating the parent. 106 string::size_type slashpos = path.find_last_of('/'); 107 if (slashpos == string::npos) { 108 // No parent given. 109 return false; 110 } 111 112 return RecursivelyCreateDir(path.substr(0, slashpos), mode) && 113 CreateDir(path, mode); 114 } 115 116 void File::DeleteRecursively(const string& name, 117 void* dummy1, void* dummy2) { 118 // We don't care too much about error checking here since this is only used 119 // in tests to delete temporary directories that are under /tmp anyway. 120 121 #ifdef _MSC_VER 122 // This interface is so weird. 123 WIN32_FIND_DATA find_data; 124 HANDLE find_handle = FindFirstFile((name + "/*").c_str(), &find_data); 125 if (find_handle == INVALID_HANDLE_VALUE) { 126 // Just delete it, whatever it is. 127 DeleteFile(name.c_str()); 128 RemoveDirectory(name.c_str()); 129 return; 130 } 131 132 do { 133 string entry_name = find_data.cFileName; 134 if (entry_name != "." && entry_name != "..") { 135 string path = name + "/" + entry_name; 136 if (find_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { 137 DeleteRecursively(path, NULL, NULL); 138 RemoveDirectory(path.c_str()); 139 } else { 140 DeleteFile(path.c_str()); 141 } 142 } 143 } while(FindNextFile(find_handle, &find_data)); 144 FindClose(find_handle); 145 146 RemoveDirectory(name.c_str()); 147 #else 148 // Use opendir()! Yay! 149 // lstat = Don't follow symbolic links. 150 struct stat stats; 151 if (lstat(name.c_str(), &stats) != 0) return; 152 153 if (S_ISDIR(stats.st_mode)) { 154 DIR* dir = opendir(name.c_str()); 155 if (dir != NULL) { 156 while (true) { 157 struct dirent* entry = readdir(dir); 158 if (entry == NULL) break; 159 string entry_name = entry->d_name; 160 if (entry_name != "." && entry_name != "..") { 161 DeleteRecursively(name + "/" + entry_name, NULL, NULL); 162 } 163 } 164 } 165 166 closedir(dir); 167 rmdir(name.c_str()); 168 169 } else if (S_ISREG(stats.st_mode)) { 170 remove(name.c_str()); 171 } 172 #endif 173 } 174 175 } // namespace protobuf 176 } // namespace google 177
