blob: 08212c2db0eaceaa62ff7616b03e6f564bbe813d [file] [log] [blame]
/*
* Copyright 2012, The Android Open Source Project
*
* 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 <sys/stat.h>
#include <stdlib.h>
#include "bcinfo/Wrap/file_wrapper_input.h"
FileWrapperInput::FileWrapperInput(const char* name) :
_name(name), _at_eof(false), _size_found(false), _size(0) {
_file = fopen(name, "rb");
if (NULL == _file) {
fprintf(stderr, "Unable to open: %s\n", name);
exit(1);
}
}
FileWrapperInput::~FileWrapperInput() {
fclose(_file);
}
size_t FileWrapperInput::Read(uint8_t* buffer, size_t wanted) {
size_t found = fread((char*) buffer, 1, wanted, _file);
if (feof(_file) || ferror(_file)) {
_at_eof = true;
}
return found;
}
bool FileWrapperInput::AtEof() {
return _at_eof;
}
off_t FileWrapperInput::Size() {
if (_size_found) return _size;
struct stat st;
if (0 == stat(_name, &st)) {
_size_found = true;
_size = st.st_size;
return _size;
} else {
fprintf(stderr, "Unable to compute file size: %s\n", _name);
exit(1);
}
// NOT REACHABLE.
return 0;
}
bool FileWrapperInput::Seek(uint32_t pos) {
return 0 == fseek(_file, (long) pos, SEEK_SET);
}