diff options
author | Pieter Wuille <pieter@wuille.net> | 2022-04-04 15:05:47 -0400 |
---|---|---|
committer | MacroFake <falke.marco@gmail.com> | 2022-04-27 14:13:39 +0200 |
commit | e7d2fbda63c346ae88767c3f8d4db3edeae2dc0b (patch) | |
tree | 4dd8119287a61d27f9b95b2a33a946ac8120d7e9 /src/util | |
parent | 8ffbd1412d887535ce5eb613884858c319bd12be (diff) |
Use std::string_view throughout util strencodings/string
Diffstat (limited to 'src/util')
-rw-r--r-- | src/util/strencodings.cpp | 28 | ||||
-rw-r--r-- | src/util/strencodings.h | 34 | ||||
-rw-r--r-- | src/util/string.h | 29 | ||||
-rw-r--r-- | src/util/system.cpp | 4 |
4 files changed, 54 insertions, 41 deletions
diff --git a/src/util/strencodings.cpp b/src/util/strencodings.cpp index b5e662cf66..35f62f0422 100644 --- a/src/util/strencodings.cpp +++ b/src/util/strencodings.cpp @@ -94,7 +94,7 @@ std::vector<unsigned char> ParseHex(std::string_view str) return vch; } -void SplitHostPort(std::string in, uint16_t& portOut, std::string& hostOut) +void SplitHostPort(std::string_view in, uint16_t& portOut, std::string& hostOut) { size_t colon = in.find_last_of(':'); // if a : is found, and it either follows a [...], or no other : is in the string, treat it as port separator @@ -176,7 +176,7 @@ std::string EncodeBase32(Span<const unsigned char> input, bool pad) return str; } -std::string EncodeBase32(const std::string& str, bool pad) +std::string EncodeBase32(std::string_view str, bool pad) { return EncodeBase32(MakeUCharSpan(str), pad); } @@ -221,7 +221,7 @@ std::optional<std::vector<unsigned char>> DecodeBase32(std::string_view str) namespace { template <typename T> -bool ParseIntegral(const std::string& str, T* out) +bool ParseIntegral(std::string_view str, T* out) { static_assert(std::is_integral<T>::value); // Replicate the exact behavior of strtol/strtoll/strtoul/strtoull when @@ -240,37 +240,37 @@ bool ParseIntegral(const std::string& str, T* out) } }; // namespace -bool ParseInt32(const std::string& str, int32_t* out) +bool ParseInt32(std::string_view str, int32_t* out) { return ParseIntegral<int32_t>(str, out); } -bool ParseInt64(const std::string& str, int64_t* out) +bool ParseInt64(std::string_view str, int64_t* out) { return ParseIntegral<int64_t>(str, out); } -bool ParseUInt8(const std::string& str, uint8_t* out) +bool ParseUInt8(std::string_view str, uint8_t* out) { return ParseIntegral<uint8_t>(str, out); } -bool ParseUInt16(const std::string& str, uint16_t* out) +bool ParseUInt16(std::string_view str, uint16_t* out) { return ParseIntegral<uint16_t>(str, out); } -bool ParseUInt32(const std::string& str, uint32_t* out) +bool ParseUInt32(std::string_view str, uint32_t* out) { return ParseIntegral<uint32_t>(str, out); } -bool ParseUInt64(const std::string& str, uint64_t* out) +bool ParseUInt64(std::string_view str, uint64_t* out) { return ParseIntegral<uint64_t>(str, out); } -std::string FormatParagraph(const std::string& in, size_t width, size_t indent) +std::string FormatParagraph(std::string_view in, size_t width, size_t indent) { assert(width >= indent); std::stringstream out; @@ -339,7 +339,7 @@ static inline bool ProcessMantissaDigit(char ch, int64_t &mantissa, int &mantiss return true; } -bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out) +bool ParseFixedPoint(std::string_view val, int decimals, int64_t *amount_out) { int64_t mantissa = 0; int64_t exponent = 0; @@ -431,14 +431,14 @@ bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out) return true; } -std::string ToLower(const std::string& str) +std::string ToLower(std::string_view str) { std::string r; for (auto ch : str) r += ToLower(ch); return r; } -std::string ToUpper(const std::string& str) +std::string ToUpper(std::string_view str) { std::string r; for (auto ch : str) r += ToUpper(ch); @@ -466,7 +466,7 @@ std::string HexStr(const Span<const uint8_t> s) return rv; } -std::optional<uint64_t> ParseByteUnits(const std::string& str, ByteUnit default_multiplier) +std::optional<uint64_t> ParseByteUnits(std::string_view str, ByteUnit default_multiplier) { if (str.empty()) { return std::nullopt; diff --git a/src/util/strencodings.h b/src/util/strencodings.h index ba8132b08d..ebb6d88952 100644 --- a/src/util/strencodings.h +++ b/src/util/strencodings.h @@ -67,7 +67,7 @@ bool IsHexNumber(std::string_view str); std::optional<std::vector<unsigned char>> DecodeBase64(std::string_view str); std::string EncodeBase64(Span<const unsigned char> input); inline std::string EncodeBase64(Span<const std::byte> input) { return EncodeBase64(MakeUCharSpan(input)); } -inline std::string EncodeBase64(const std::string& str) { return EncodeBase64(MakeUCharSpan(str)); } +inline std::string EncodeBase64(std::string_view str) { return EncodeBase64(MakeUCharSpan(str)); } std::optional<std::vector<unsigned char>> DecodeBase32(std::string_view str); /** @@ -82,9 +82,9 @@ std::string EncodeBase32(Span<const unsigned char> input, bool pad = true); * If `pad` is true, then the output will be padded with '=' so that its length * is a multiple of 8. */ -std::string EncodeBase32(const std::string& str, bool pad = true); +std::string EncodeBase32(std::string_view str, bool pad = true); -void SplitHostPort(std::string in, uint16_t& portOut, std::string& hostOut); +void SplitHostPort(std::string_view in, uint16_t& portOut, std::string& hostOut); // LocaleIndependentAtoi is provided for backwards compatibility reasons. // @@ -98,12 +98,12 @@ void SplitHostPort(std::string in, uint16_t& portOut, std::string& hostOut); // undefined behavior, while this function returns the maximum or minimum // values, respectively. template <typename T> -T LocaleIndependentAtoi(const std::string& str) +T LocaleIndependentAtoi(std::string_view str) { static_assert(std::is_integral<T>::value); T result; // Emulate atoi(...) handling of white space and leading +/-. - std::string s = TrimString(str); + std::string_view s = TrimStringView(str); if (!s.empty() && s[0] == '+') { if (s.length() >= 2 && s[1] == '-') { return 0; @@ -159,7 +159,7 @@ constexpr inline bool IsSpace(char c) noexcept { * parsed value is not in the range representable by the type T. */ template <typename T> -std::optional<T> ToIntegral(const std::string& str) +std::optional<T> ToIntegral(std::string_view str) { static_assert(std::is_integral<T>::value); T result; @@ -175,42 +175,42 @@ std::optional<T> ToIntegral(const std::string& str) * @returns true if the entire string could be parsed as valid integer, * false if not the entire string could be parsed or when overflow or underflow occurred. */ -[[nodiscard]] bool ParseInt32(const std::string& str, int32_t *out); +[[nodiscard]] bool ParseInt32(std::string_view str, int32_t *out); /** * Convert string to signed 64-bit integer with strict parse error feedback. * @returns true if the entire string could be parsed as valid integer, * false if not the entire string could be parsed or when overflow or underflow occurred. */ -[[nodiscard]] bool ParseInt64(const std::string& str, int64_t *out); +[[nodiscard]] bool ParseInt64(std::string_view str, int64_t *out); /** * Convert decimal string to unsigned 8-bit integer with strict parse error feedback. * @returns true if the entire string could be parsed as valid integer, * false if not the entire string could be parsed or when overflow or underflow occurred. */ -[[nodiscard]] bool ParseUInt8(const std::string& str, uint8_t *out); +[[nodiscard]] bool ParseUInt8(std::string_view str, uint8_t *out); /** * Convert decimal string to unsigned 16-bit integer with strict parse error feedback. * @returns true if the entire string could be parsed as valid integer, * false if the entire string could not be parsed or if overflow or underflow occurred. */ -[[nodiscard]] bool ParseUInt16(const std::string& str, uint16_t* out); +[[nodiscard]] bool ParseUInt16(std::string_view str, uint16_t* out); /** * Convert decimal string to unsigned 32-bit integer with strict parse error feedback. * @returns true if the entire string could be parsed as valid integer, * false if not the entire string could be parsed or when overflow or underflow occurred. */ -[[nodiscard]] bool ParseUInt32(const std::string& str, uint32_t *out); +[[nodiscard]] bool ParseUInt32(std::string_view str, uint32_t *out); /** * Convert decimal string to unsigned 64-bit integer with strict parse error feedback. * @returns true if the entire string could be parsed as valid integer, * false if not the entire string could be parsed or when overflow or underflow occurred. */ -[[nodiscard]] bool ParseUInt64(const std::string& str, uint64_t *out); +[[nodiscard]] bool ParseUInt64(std::string_view str, uint64_t *out); /** * Convert a span of bytes to a lower-case hexadecimal string. @@ -223,7 +223,7 @@ inline std::string HexStr(const Span<const std::byte> s) { return HexStr(MakeUCh * Format a paragraph of text to a fixed width, adding spaces for * indentation to any added line. */ -std::string FormatParagraph(const std::string& in, size_t width = 79, size_t indent = 0); +std::string FormatParagraph(std::string_view in, size_t width = 79, size_t indent = 0); /** * Timing-attack-resistant comparison. @@ -245,7 +245,7 @@ bool TimingResistantEqual(const T& a, const T& b) * @returns true on success, false on error. * @note The result must be in the range (-10^18,10^18), otherwise an overflow error will trigger. */ -[[nodiscard]] bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out); +[[nodiscard]] bool ParseFixedPoint(std::string_view, int decimals, int64_t *amount_out); namespace { /** Helper class for the default infn argument to ConvertBits (just returns the input). */ @@ -306,7 +306,7 @@ constexpr char ToLower(char c) * @param[in] str the string to convert to lowercase. * @returns lowercased equivalent of str */ -std::string ToLower(const std::string& str); +std::string ToLower(std::string_view str); /** * Converts the given character to its uppercase equivalent. @@ -332,7 +332,7 @@ constexpr char ToUpper(char c) * @param[in] str the string to convert to uppercase. * @returns UPPERCASED EQUIVALENT OF str */ -std::string ToUpper(const std::string& str); +std::string ToUpper(std::string_view str); /** * Capitalizes the first character of the given string. @@ -356,6 +356,6 @@ std::string Capitalize(std::string str); * @returns optional uint64_t bytes from str or nullopt * if ToIntegral is false, str is empty, trailing whitespace or overflow */ -std::optional<uint64_t> ParseByteUnits(const std::string& str, ByteUnit default_multiplier); +std::optional<uint64_t> ParseByteUnits(std::string_view str, ByteUnit default_multiplier); #endif // BITCOIN_UTIL_STRENCODINGS_H diff --git a/src/util/string.h b/src/util/string.h index bcd6905fd5..81f5e21111 100644 --- a/src/util/string.h +++ b/src/util/string.h @@ -21,17 +21,22 @@ return spanparsing::Split<std::string>(str, sep); } -[[nodiscard]] inline std::string TrimString(const std::string& str, const std::string& pattern = " \f\n\r\t\v") +[[nodiscard]] inline std::string_view TrimStringView(std::string_view str, std::string_view pattern = " \f\n\r\t\v") { std::string::size_type front = str.find_first_not_of(pattern); if (front == std::string::npos) { - return std::string(); + return {}; } std::string::size_type end = str.find_last_not_of(pattern); return str.substr(front, end - front + 1); } -[[nodiscard]] inline std::string RemovePrefix(const std::string& str, const std::string& prefix) +[[nodiscard]] inline std::string TrimString(std::string_view str, std::string_view pattern = " \f\n\r\t\v") +{ + return std::string(TrimStringView(str, pattern)); +} + +[[nodiscard]] inline std::string_view RemovePrefixView(std::string_view str, std::string_view prefix) { if (str.substr(0, prefix.size()) == prefix) { return str.substr(prefix.size()); @@ -39,6 +44,11 @@ return str; } +[[nodiscard]] inline std::string RemovePrefix(std::string_view str, std::string_view prefix) +{ + return std::string(RemovePrefixView(str, prefix)); +} + /** * Join a list of items * @@ -58,14 +68,14 @@ auto Join(const std::vector<T>& list, const BaseType& separator, UnaryOp unary_o return ret; } -template <typename T> -T Join(const std::vector<T>& list, const T& separator) +template <typename T, typename T2> +T Join(const std::vector<T>& list, const T2& separator) { return Join(list, separator, [](const T& i) { return i; }); } // Explicit overload needed for c_str arguments, which would otherwise cause a substitution failure in the template above. -inline std::string Join(const std::vector<std::string>& list, const std::string& separator) +inline std::string Join(const std::vector<std::string>& list, std::string_view separator) { return Join<std::string>(list, separator); } @@ -81,9 +91,12 @@ inline std::string MakeUnorderedList(const std::vector<std::string>& items) /** * Check if a string does not contain any embedded NUL (\0) characters */ -[[nodiscard]] inline bool ValidAsCString(const std::string& str) noexcept +[[nodiscard]] inline bool ValidAsCString(std::string_view str) noexcept { - return str.size() == strlen(str.c_str()); + for (auto c : str) { + if (c == 0) return false; + } + return true; } /** diff --git a/src/util/system.cpp b/src/util/system.cpp index a7e66defcd..f9a9ad3e20 100644 --- a/src/util/system.cpp +++ b/src/util/system.cpp @@ -853,8 +853,8 @@ static bool GetConfigOptions(std::istream& stream, const std::string& filepath, error = strprintf("parse error on line %i: %s, options in configuration file must be specified without leading -", linenr, str); return false; } else if ((pos = str.find('=')) != std::string::npos) { - std::string name = prefix + TrimString(str.substr(0, pos), pattern); - std::string value = TrimString(str.substr(pos + 1), pattern); + std::string name = prefix + TrimString(std::string_view{str}.substr(0, pos), pattern); + std::string_view value = TrimStringView(std::string_view{str}.substr(pos + 1), pattern); if (used_hash && name.find("rpcpassword") != std::string::npos) { error = strprintf("parse error on line %i, using # in rpcpassword can be ambiguous and should be avoided", linenr); return false; |