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https://github.com/nlohmann/json
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64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
#pragma once
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#include <string>
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#include <nlohmann/detail/macro_scope.hpp>
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namespace nlohmann
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{
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namespace detail
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{
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/*!
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@brief replace all occurrences of a substring by another string
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@param[in,out] s the string to manipulate; changed so that all
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occurrences of @a f are replaced with @a t
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@param[in] f the substring to replace with @a t
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@param[in] t the string to replace @a f
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@pre The search string @a f must not be empty. **This precondition is
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enforced with an assertion.**
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@since version 2.0.0
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*/
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inline void replace_substring(std::string& s, const std::string& f,
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const std::string& t)
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{
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JSON_ASSERT(!f.empty());
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for (auto pos = s.find(f); // find first occurrence of f
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pos != std::string::npos; // make sure f was found
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s.replace(pos, f.size(), t), // replace with t, and
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pos = s.find(f, pos + t.size())) // find next occurrence of f
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{}
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}
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/*!
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* @brief string escaping as described in RFC 6901 (Sect. 4)
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* @param[in] s string to escape
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* @return escaped string
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*
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* Note the order of escaping "~" to "~0" and "/" to "~1" is important.
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*/
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inline std::string escape(std::string s)
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{
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replace_substring(s, "~", "~0");
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replace_substring(s, "/", "~1");
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return s;
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}
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/*!
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* @brief string unescaping as described in RFC 6901 (Sect. 4)
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* @param[in] s string to unescape
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* @return unescaped string
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*
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* Note the order of escaping "~1" to "/" and "~0" to "~" is important.
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*/
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static void unescape(std::string& s)
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{
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replace_substring(s, "~1", "/");
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replace_substring(s, "~0", "~");
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}
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} // namespace detail
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} // namespace nlohmann
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