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 29Makefile::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 59Makefile::~Makefile() { 60 for (Stmt* stmt : stmts_) 61 delete stmt; 62} 63