/usr/include/firefox/ots-memory-stream.h is in firefox-dev 11.0+build1-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | // Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef OTS_MEMORY_STREAM_H_
#define OTS_MEMORY_STREAM_H_
#include <cstring>
#include <limits>
#include "opentype-sanitiser.h"
namespace ots {
class MemoryStream : public OTSStream {
public:
MemoryStream(void *ptr, size_t length)
: ptr_(ptr), length_(length), off_(0) {
}
virtual bool WriteRaw(const void *data, size_t length) {
if ((off_ + length > length_) ||
(length > std::numeric_limits<size_t>::max() - off_)) {
return false;
}
std::memcpy(static_cast<char*>(ptr_) + off_, data, length);
off_ += length;
return true;
}
virtual bool Seek(off_t position) {
if (position < 0) return false;
if (static_cast<size_t>(position) > length_) return false;
off_ = position;
return true;
}
virtual off_t Tell() const {
return off_;
}
private:
void* const ptr_;
size_t length_;
off_t off_;
};
class ExpandingMemoryStream : public OTSStream {
public:
ExpandingMemoryStream(size_t initial, size_t limit)
: length_(initial), limit_(limit), off_(0) {
ptr_ = new uint8_t[length_];
}
~ExpandingMemoryStream() {
delete[] static_cast<uint8_t*>(ptr_);
}
void* get() const {
return ptr_;
}
bool WriteRaw(const void *data, size_t length) {
if ((off_ + length > length_) ||
(length > std::numeric_limits<size_t>::max() - off_)) {
if (length_ == limit_)
return false;
size_t new_length = (length_ + 1) * 2;
if (new_length < length_)
return false;
if (new_length > limit_)
new_length = limit_;
uint8_t* new_buf = new uint8_t[new_length];
memcpy(new_buf, ptr_, length_);
length_ = new_length;
delete[] static_cast<uint8_t*>(ptr_);
ptr_ = new_buf;
return WriteRaw(data, length);
}
std::memcpy(static_cast<char*>(ptr_) + off_, data, length);
off_ += length;
return true;
}
bool Seek(off_t position) {
if (position < 0) return false;
if (static_cast<size_t>(position) > length_) return false;
off_ = position;
return true;
}
off_t Tell() const {
return off_;
}
private:
void* ptr_;
size_t length_;
const size_t limit_;
off_t off_;
};
} // namespace ots
#endif // OTS_MEMORY_STREAM_H_
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