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