1// Protocol Buffers - Google's data interchange format
2// Copyright 2008 Google Inc.  All rights reserved.
3// https://developers.google.com/protocol-buffers/
4//
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30
31// Author: jasonh@google.com (Jason Hsueh)
32//
33// Implements methods of coded_stream.h that need to be inlined for performance
34// reasons, but should not be defined in a public header.
35
36#ifndef GOOGLE_PROTOBUF_IO_CODED_STREAM_INL_H__
37#define GOOGLE_PROTOBUF_IO_CODED_STREAM_INL_H__
38
39#include <google/protobuf/stubs/logging.h>
40#include <google/protobuf/stubs/common.h>
41#include <google/protobuf/io/coded_stream.h>
42#include <google/protobuf/io/zero_copy_stream_impl_lite.h>
43#include <string>
44#include <google/protobuf/stubs/stl_util.h>
45
46namespace google {
47namespace protobuf {
48namespace io {
49
50inline bool CodedInputStream::InternalReadStringInline(string* buffer,
51                                                       int size) {
52  if (size < 0) return false;  // security: size is often user-supplied
53
54  if (BufferSize() >= size) {
55    STLStringResizeUninitialized(buffer, size);
56    std::pair<char*, bool> z = as_string_data(buffer);
57    if (z.second) {
58      // Oddly enough, memcpy() requires its first two args to be non-NULL even
59      // if we copy 0 bytes.  So, we have ensured that z.first is non-NULL here.
60      GOOGLE_DCHECK(z.first != NULL);
61      memcpy(z.first, buffer_, size);
62      Advance(size);
63    }
64    return true;
65  }
66
67  return ReadStringFallback(buffer, size);
68}
69
70inline bool CodedInputStream::InternalReadRawInline(void* buffer, int size) {
71  int current_buffer_size;
72  while ((current_buffer_size = BufferSize()) < size) {
73    // Reading past end of buffer.  Copy what we have, then refresh.
74    memcpy(buffer, buffer_, current_buffer_size);
75    buffer = reinterpret_cast<uint8*>(buffer) + current_buffer_size;
76    size -= current_buffer_size;
77    Advance(current_buffer_size);
78    if (!Refresh()) return false;
79  }
80
81  memcpy(buffer, buffer_, size);
82  Advance(size);
83
84  return true;
85}
86
87}  // namespace io
88}  // namespace protobuf
89}  // namespace google
90#endif  // GOOGLE_PROTOBUF_IO_CODED_STREAM_INL_H__
91