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Submodule dependency
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from 028695 to 31cd24
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114 changes: 114 additions & 0 deletions
114
app/src/main/cpp/crash/include/breakpad/common/string_view.h
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,114 @@ | ||
| // Copyright (c) 2021 Google Inc. | ||
| // All rights reserved. | ||
| // | ||
| // 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. | ||
|
|
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| #ifndef COMMON_STRING_VIEW_H__ | ||
| #define COMMON_STRING_VIEW_H__ | ||
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| #include <cassert> | ||
| #include <cstring> | ||
| #include <ostream> | ||
| #include "common/using_std_string.h" | ||
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| namespace google_breakpad { | ||
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| // A StringView is a string reference to a string object, but not own the | ||
| // string object. It's a compatibile layer until we can use std::string_view in | ||
| // C++17. | ||
| class StringView { | ||
| private: | ||
| // The start of the string, in an external buffer. It doesn't have to be | ||
| // null-terminated. | ||
| const char* data_ = ""; | ||
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| size_t length_ = 0; | ||
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| public: | ||
| // Construct an empty StringView. | ||
| StringView() = default; | ||
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| // Disallow construct StringView from nullptr. | ||
| StringView(std::nullptr_t) = delete; | ||
|
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| // Construct a StringView from a cstring. | ||
| StringView(const char* str) : data_(str) { | ||
| assert(str); | ||
| length_ = strlen(str); | ||
| } | ||
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| // Construct a StringView from a cstring with fixed length. | ||
| StringView(const char* str, size_t length) : data_(str), length_(length) { | ||
| assert(str); | ||
| } | ||
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| // Construct a StringView from an std::string. | ||
| StringView(const string& str) : data_(str.data()), length_(str.length()) {} | ||
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| string str() const { return string(data_, length_); } | ||
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| const char* data() const { return data_; } | ||
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| bool empty() const { return length_ == 0; } | ||
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| size_t size() const { return length_; } | ||
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| int compare(StringView rhs) const { | ||
| size_t min_len = std::min(size(), rhs.size()); | ||
| int res = memcmp(data_, rhs.data(), min_len); | ||
| if (res != 0) | ||
| return res; | ||
| if (size() == rhs.size()) | ||
| return 0; | ||
| return size() < rhs.size() ? -1 : 1; | ||
| } | ||
| }; | ||
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| inline bool operator==(StringView lhs, StringView rhs) { | ||
| return lhs.compare(rhs) == 0; | ||
| } | ||
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| inline bool operator!=(StringView lhs, StringView rhs) { | ||
| return lhs.compare(rhs) != 0; | ||
| } | ||
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| inline bool operator<(StringView lhs, StringView rhs) { | ||
| return lhs.compare(rhs) < 0; | ||
| } | ||
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| inline bool operator>(StringView lhs, StringView rhs) { | ||
| return lhs.compare(rhs) > 0; | ||
| } | ||
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| inline std::ostream& operator<<(std::ostream& os, StringView s) { | ||
| os << s.str(); | ||
| return os; | ||
| } | ||
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| } // namespace google_breakpad | ||
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| #endif // COMMON_STRING_VIEW_H__ |
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