1 // Protocol Buffers - Google's data interchange format
2 // Copyright 2008 Google Inc. All rights reserved.
3 // https://developers.google.com/protocol-buffers/
4 //
5 // Redistribution and use in source and binary forms, with or without
6 // modification, are permitted provided that the following conditions are
7 // met:
8 //
9 // * Redistributions of source code must retain the above copyright
10 // notice, this list of conditions and the following disclaimer.
11 // * Redistributions in binary form must reproduce the above
12 // copyright notice, this list of conditions and the following disclaimer
13 // in the documentation and/or other materials provided with the
14 // distribution.
15 // * Neither the name of Google Inc. nor the names of its
16 // contributors may be used to endorse or promote products derived from
17 // this software without specific prior written permission.
18 //
19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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
46 namespace google {
47 namespace protobuf {
48 namespace io {
49
InternalReadStringInline(string * buffer,int size)50 inline 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
InternalReadRawInline(void * buffer,int size)70 inline 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