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Diffstat (limited to 'NorthstarDedicatedTest/include/protobuf/stubs/stl_util.h')
| -rw-r--r-- | NorthstarDedicatedTest/include/protobuf/stubs/stl_util.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/NorthstarDedicatedTest/include/protobuf/stubs/stl_util.h b/NorthstarDedicatedTest/include/protobuf/stubs/stl_util.h new file mode 100644 index 00000000..c1904d01 --- /dev/null +++ b/NorthstarDedicatedTest/include/protobuf/stubs/stl_util.h @@ -0,0 +1,85 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// from google3/util/gtl/stl_util.h + +#ifndef GOOGLE_PROTOBUF_STUBS_STL_UTIL_H__ +#define GOOGLE_PROTOBUF_STUBS_STL_UTIL_H__ + +#include <stubs/common.h> + +#include <algorithm> + +namespace google { +namespace protobuf { + +// Inside Google, this function implements a horrible, disgusting hack in which +// we reach into the string's private implementation and resize it without +// initializing the new bytes. In some cases doing this can significantly +// improve performance. However, since it's totally non-portable it has no +// place in open source code. Feel free to fill this function in with your +// own disgusting hack if you want the perf boost. +inline void STLStringResizeUninitialized(std::string* s, size_t new_size) { + s->resize(new_size); +} + +// As above, but we make sure to follow amortized growth in which we always +// increase the capacity by at least a constant factor >1. +inline void STLStringResizeUninitializedAmortized(std::string* s, + size_t new_size) { + const size_t cap = s->capacity(); + if (new_size > cap) { + // Make sure to always grow by at least a factor of 2x. + s->reserve(std::max(new_size, 2 * cap)); + } + STLStringResizeUninitialized(s, new_size); +} + +// Return a mutable char* pointing to a string's internal buffer, +// which may not be null-terminated. Writing through this pointer will +// modify the string. +// +// string_as_array(&str)[i] is valid for 0 <= i < str.size() until the +// next call to a string method that invalidates iterators. +// +// As of 2006-04, there is no standard-blessed way of getting a +// mutable reference to a string's internal buffer. However, issue 530 +// (http://www.open-std.org/JTC1/SC22/WG21/docs/lwg-active.html#530) +// proposes this as the method. According to Matt Austern, this should +// already work on all current implementations. +inline char* string_as_array(std::string* str) { + // DO NOT USE const_cast<char*>(str->data())! See the unittest for why. + return str->empty() ? nullptr : &*str->begin(); +} + +} // namespace protobuf +} // namespace google + +#endif // GOOGLE_PROTOBUF_STUBS_STL_UTIL_H__ |