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https://github.com/owasp-modsecurity/ModSecurity.git
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dc0a06fc70
- The previous approach would create a std::unique_ptr and store it in
a std::list in VariableValue (Origins)
- The new approach now stores Origins in a std::vector and constructs
VariableOrigin elements in-place on insertion.
- Instead of having two heap-allocations for every added VariableOrigin
instance, this performs only one.
- If multiple origins are added, std::vector's growth strategy may even
prevent a heap-allocation. There's a cost on growing the size of the
vector, because a copy of current elements will be necessary.
- Introduced reserveOrigin method to notify that multiple insertions
will be made, so that we can use std::vector's reserve and do a
single allocation (and copy of previous elements), and then just
initialize the new elements in-place.
61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
/*
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* ModSecurity, http://www.modsecurity.org/
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* Copyright (c) 2015 - 2021 Trustwave Holdings, Inc. (http://www.trustwave.com/)
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*
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* You may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* If any of the files related to licensing are missing or if you have any
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* other questions related to licensing please contact Trustwave Holdings, Inc.
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* directly using the email address security@modsecurity.org.
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*
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*/
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#ifdef __cplusplus
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#include <string>
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#include <memory>
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#endif
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#ifndef HEADERS_MODSECURITY_VARIABLE_ORIGIN_H_
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#define HEADERS_MODSECURITY_VARIABLE_ORIGIN_H_
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#ifndef __cplusplus
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typedef struct DebugLog_t DebugLog;
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#endif
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#ifdef __cplusplus
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namespace modsecurity {
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/** @ingroup ModSecurity_CPP_API */
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class VariableOrigin {
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public:
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VariableOrigin()
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: m_length(0),
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m_offset(0) { }
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VariableOrigin(size_t length, size_t offset)
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: m_length(length),
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m_offset(offset) { }
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std::string toText() const {
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const auto offset = std::to_string(m_offset);
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const auto len = std::to_string(m_length);
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return "v" + offset + "," + len;
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}
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size_t m_length;
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size_t m_offset;
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};
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} // namespace modsecurity
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#endif
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#endif // HEADERS_MODSECURITY_VARIABLE_ORIGIN_H_
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