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// Copyright 2015 Google Inc. All rights reserved
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "file.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "ast.h"
#include "log.h"
#include "parser.h"
Makefile::Makefile(const string& filename)
: buf_(NULL), len_(0), mtime_(0), filename_(filename) {
int fd = open(filename.c_str(), O_RDONLY);
if (fd < 0) {
return;
}
struct stat st;
if (fstat(fd, &st) < 0) {
PERROR("fstat failed for %s", filename.c_str());
}
len_ = st.st_size;
mtime_ = st.st_mtime;
buf_ = new char[len_];
ssize_t r = read(fd, buf_, len_);
if (r != static_cast<ssize_t>(len_)) {
if (r < 0)
PERROR("read failed for %s", filename.c_str());
ERROR("Unexpected read length=%zd expected=%zu", r, len_);
}
if (close(fd) < 0) {
PERROR("close failed for %s", filename.c_str());
}
Parse(this);
}
Makefile::~Makefile() {
delete[] buf_;
for (AST* ast : asts_)
delete ast;
}
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