1 // Copyright 2015 Google Inc. All rights reserved 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // +build ignore 16 17 #include "file.h" 18 19 #include <fcntl.h> 20 #include <sys/stat.h> 21 #include <sys/types.h> 22 #include <unistd.h> 23 24 #include "fileutil.h" 25 #include "log.h" 26 #include "parser.h" 27 #include "stmt.h" 28 29 Makefile::Makefile(const string& filename) 30 : mtime_(0), filename_(filename), exists_(false) { 31 int fd = open(filename.c_str(), O_RDONLY); 32 if (fd < 0) { 33 return; 34 } 35 36 struct stat st; 37 if (fstat(fd, &st) < 0) { 38 PERROR("fstat failed for %s", filename.c_str()); 39 } 40 41 size_t len = st.st_size; 42 mtime_ = st.st_mtime; 43 buf_.resize(len); 44 exists_ = true; 45 ssize_t r = HANDLE_EINTR(read(fd, &buf_[0], len)); 46 if (r != static_cast<ssize_t>(len)) { 47 if (r < 0) 48 PERROR("read failed for %s", filename.c_str()); 49 ERROR("Unexpected read length=%zd expected=%zu", r, len); 50 } 51 52 if (close(fd) < 0) { 53 PERROR("close failed for %s", filename.c_str()); 54 } 55 56 Parse(this); 57 } 58 59 Makefile::~Makefile() { 60 for (Stmt* stmt : stmts_) 61 delete stmt; 62 } 63
