1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
/* Copyright 2012 The Native Client Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can
* be found in the LICENSE file.
*/
#include <sys/stat.h>
#include <stdlib.h>
#include "llvm/Wrap/file_wrapper_input.h"
FileWrapperInput::FileWrapperInput(const std::string& name) :
_name(name), _at_eof(false), _size_found(false), _size(0) {
_file = fopen(name.c_str(), "rb");
if (NULL == _file) {
fprintf(stderr, "Unable to open: %s\n", name.c_str());
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.c_str(), &st)) {
_size_found = true;
_size = st.st_size;
return _size;
} else {
fprintf(stderr, "Unable to compute file size: %s\n", _name.c_str());
exit(1);
}
// NOT REACHABLE.
return 0;
}
bool FileWrapperInput::Seek(uint32_t pos) {
return 0 == fseek(_file, (long) pos, SEEK_SET);
}
|
