Joe Onorato | 0578cbc | 2016-10-19 17:03:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "util.h" |
| 18 | |
| 19 | #include <sys/types.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <dirent.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | |
| 26 | FileInfo::FileInfo() |
| 27 | { |
| 28 | memset(this, 0, sizeof(FileInfo)); |
| 29 | } |
| 30 | |
| 31 | FileInfo::FileInfo(const FileInfo& that) |
| 32 | { |
| 33 | memcpy(this, &that, sizeof(FileInfo)); |
| 34 | } |
| 35 | |
| 36 | FileInfo::FileInfo(const string& filename) |
| 37 | { |
| 38 | struct stat st; |
| 39 | int err = stat(filename.c_str(), &st); |
| 40 | if (err != 0) { |
| 41 | memset(this, 0, sizeof(FileInfo)); |
| 42 | } else { |
| 43 | exists = true; |
| 44 | mtime = st.st_mtime; |
| 45 | ctime = st.st_ctime; |
| 46 | size = st.st_size; |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | bool |
| 51 | FileInfo::operator==(const FileInfo& that) const |
| 52 | { |
| 53 | return exists == that.exists |
| 54 | && mtime == that.mtime |
| 55 | && ctime == that.ctime |
| 56 | && size == that.size; |
| 57 | } |
| 58 | |
| 59 | bool |
| 60 | FileInfo::operator!=(const FileInfo& that) const |
| 61 | { |
| 62 | return exists != that.exists |
| 63 | || mtime != that.mtime |
| 64 | || ctime != that.ctime |
| 65 | || size != that.size; |
| 66 | } |
| 67 | |
| 68 | FileInfo::~FileInfo() |
| 69 | { |
| 70 | } |
| 71 | |
| 72 | TrackedFile::TrackedFile() |
| 73 | :filename(), |
| 74 | fileInfo() |
| 75 | { |
| 76 | } |
| 77 | |
| 78 | TrackedFile::TrackedFile(const TrackedFile& that) |
| 79 | { |
| 80 | filename = that.filename; |
| 81 | fileInfo = that.fileInfo; |
| 82 | } |
| 83 | |
| 84 | TrackedFile::TrackedFile(const string& file) |
| 85 | :filename(file), |
| 86 | fileInfo(file) |
| 87 | { |
| 88 | } |
| 89 | |
| 90 | TrackedFile::~TrackedFile() |
| 91 | { |
| 92 | } |
| 93 | |
| 94 | bool |
| 95 | TrackedFile::HasChanged() const |
| 96 | { |
| 97 | FileInfo updated(filename); |
| 98 | return !updated.exists || fileInfo != updated; |
| 99 | } |
| 100 | |
| 101 | void |
| 102 | get_directory_contents(const string& name, map<string,FileInfo>* results) |
| 103 | { |
Joe Onorato | 0578cbc | 2016-10-19 17:03:06 -0700 | [diff] [blame] | 104 | DIR* dir = opendir(name.c_str()); |
| 105 | if (dir == NULL) { |
| 106 | return; |
| 107 | } |
| 108 | |
| 109 | dirent* entry; |
| 110 | while ((entry = readdir(dir)) != NULL) { |
| 111 | if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) { |
| 112 | continue; |
| 113 | } |
| 114 | if (entry->d_type == DT_DIR) { |
| 115 | string subdir = name + "/" + entry->d_name; |
| 116 | get_directory_contents(subdir, results); |
| 117 | } else if (entry->d_type == DT_LNK || entry->d_type == DT_REG) { |
| 118 | string filename(name + "/" + entry->d_name); |
| 119 | (*results)[filename] = FileInfo(filename); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | closedir(dir); |
| 124 | } |
| 125 | |
| 126 | bool |
| 127 | directory_contents_differ(const map<string,FileInfo>& before, const map<string,FileInfo>& after) |
| 128 | { |
| 129 | if (before.size() != after.size()) { |
| 130 | return true; |
| 131 | } |
| 132 | map<string,FileInfo>::const_iterator b = before.begin(); |
| 133 | map<string,FileInfo>::const_iterator a = after.begin(); |
| 134 | while (b != before.end() && a != after.end()) { |
| 135 | if (b->first != a->first) { |
| 136 | return true; |
| 137 | } |
| 138 | if (a->second != b->second) { |
| 139 | return true; |
| 140 | } |
| 141 | a++; |
| 142 | b++; |
| 143 | } |
| 144 | return false; |
| 145 | } |
| 146 | |
| 147 | string |
| 148 | escape_quotes(const char* str) |
| 149 | { |
| 150 | string result; |
| 151 | while (*str) { |
| 152 | if (*str == '"') { |
| 153 | result += '\\'; |
| 154 | result += '"'; |
| 155 | } else { |
| 156 | result += *str; |
| 157 | } |
| 158 | } |
| 159 | return result; |
| 160 | } |
| 161 | |
| 162 | string |
| 163 | escape_for_commandline(const char* str) |
| 164 | { |
| 165 | if (strchr(str, '"') != NULL || strchr(str, ' ') != NULL |
| 166 | || strchr(str, '\t') != NULL) { |
| 167 | return escape_quotes(str); |
| 168 | } else { |
| 169 | return str; |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | static bool |
| 174 | spacechr(char c) |
| 175 | { |
| 176 | return c == ' ' || c == '\t' || c == '\n' || c == '\r'; |
| 177 | } |
| 178 | |
| 179 | string |
| 180 | trim(const string& str) |
| 181 | { |
| 182 | const ssize_t N = (ssize_t)str.size(); |
| 183 | ssize_t begin = 0; |
| 184 | while (begin < N && spacechr(str[begin])) { |
| 185 | begin++; |
| 186 | } |
| 187 | ssize_t end = N - 1; |
| 188 | while (end >= begin && spacechr(str[end])) { |
| 189 | end--; |
| 190 | } |
| 191 | return string(str, begin, end-begin+1); |
| 192 | } |
| 193 | |
| 194 | bool |
| 195 | starts_with(const string& str, const string& prefix) |
| 196 | { |
| 197 | return str.compare(0, prefix.length(), prefix) == 0; |
| 198 | } |
| 199 | |
| 200 | bool |
| 201 | ends_with(const string& str, const string& suffix) |
| 202 | { |
| 203 | if (str.length() < suffix.length()) { |
| 204 | return false; |
| 205 | } else { |
| 206 | return str.compare(str.length()-suffix.length(), suffix.length(), suffix) == 0; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | void |
| 211 | split_lines(vector<string>* result, const string& str) |
| 212 | { |
| 213 | const int N = str.length(); |
| 214 | int begin = 0; |
| 215 | int end = 0; |
| 216 | for (; end < N; end++) { |
| 217 | const char c = str[end]; |
| 218 | if (c == '\r' || c == '\n') { |
| 219 | if (begin != end) { |
| 220 | result->push_back(string(str, begin, end-begin)); |
| 221 | } |
| 222 | begin = end+1; |
| 223 | } |
| 224 | } |
| 225 | if (begin != end) { |
| 226 | result->push_back(string(str, begin, end-begin)); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | string |
| 231 | read_file(const string& filename) |
| 232 | { |
| 233 | FILE* file = fopen(filename.c_str(), "r"); |
| 234 | if (file == NULL) { |
| 235 | return string(); |
| 236 | } |
| 237 | |
| 238 | fseek(file, 0, SEEK_END); |
| 239 | int size = ftell(file); |
| 240 | fseek(file, 0, SEEK_SET); |
| 241 | |
| 242 | char* buf = (char*)malloc(size); |
Chih-Hung Hsieh | c7edf07 | 2017-10-03 09:57:55 -0700 | [diff] [blame] | 243 | if ((size_t) size != fread(buf, 1, size, file)) { |
Greg Kaiser | 5799d65 | 2018-03-26 14:01:38 -0700 | [diff] [blame] | 244 | free(buf); |
| 245 | fclose(file); |
Chih-Hung Hsieh | c7edf07 | 2017-10-03 09:57:55 -0700 | [diff] [blame] | 246 | return string(); |
| 247 | } |
Joe Onorato | 0578cbc | 2016-10-19 17:03:06 -0700 | [diff] [blame] | 248 | |
| 249 | string result(buf, size); |
| 250 | |
| 251 | free(buf); |
| 252 | fclose(file); |
| 253 | |
| 254 | return result; |
| 255 | } |
| 256 | |
Joe Onorato | 6c97f49 | 2019-02-27 20:42:37 -0500 | [diff] [blame^] | 257 | bool |
| 258 | is_executable(const string& filename) |
| 259 | { |
| 260 | int err; |
| 261 | struct stat st; |
Joe Onorato | 0578cbc | 2016-10-19 17:03:06 -0700 | [diff] [blame] | 262 | |
Joe Onorato | 6c97f49 | 2019-02-27 20:42:37 -0500 | [diff] [blame^] | 263 | err = stat(filename.c_str(), &st); |
| 264 | if (err != 0) { |
| 265 | return false; |
| 266 | } |
| 267 | |
| 268 | return (st.st_mode & S_IXUSR) != 0; |
| 269 | } |
| 270 | |
| 271 | string |
| 272 | dirname(const string& filename) |
| 273 | { |
| 274 | size_t slash = filename.rfind('/'); |
| 275 | if (slash == string::npos) { |
| 276 | return ""; |
| 277 | } else if (slash == 0) { |
| 278 | return "/"; |
| 279 | } else { |
| 280 | return string(filename, 0, slash); |
| 281 | } |
| 282 | } |
| 283 | |
| 284 | string |
| 285 | leafname(const string& filename) |
| 286 | { |
| 287 | size_t slash = filename.rfind('/'); |
| 288 | if (slash == string::npos) { |
| 289 | return filename; |
| 290 | } else if (slash == filename.length() - 1) { |
| 291 | return ""; |
| 292 | } else { |
| 293 | return string(filename, slash + 1); |
| 294 | } |
| 295 | } |