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StringUtil: Add FromCharsWithOptionalBase()

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Stenzek 2024-10-07 21:54:11 +10:00
parent 0d05548459
commit 2079bac40b
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2 changed files with 39 additions and 0 deletions
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12
src/common/string_util.cpp
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@ -152,6 +152,18 @@ std::size_t StringUtil::Strlcpy(char* dst, const std::string_view src, std::size
return len; return len;
} }
u8 StringUtil::DecodeHexDigit(char ch)
{
if (ch >= '0' && ch <= '9')
return static_cast<u8>(ch - '0');
else if (ch >= 'a' && ch <= 'f')
return static_cast<u8>(0xa + (ch - 'a'));
else if (ch >= 'A' && ch <= 'F')
return static_cast<u8>(0xa + (ch - 'A'));
else
return 0;
}
std::optional<std::vector<u8>> StringUtil::DecodeHex(const std::string_view in) std::optional<std::vector<u8>> StringUtil::DecodeHex(const std::string_view in)
{ {
std::vector<u8> data; std::vector<u8> data;

27
src/common/string_util.h
View File

@ -114,6 +114,32 @@ inline std::optional<T> FromChars(const std::string_view str, int base, std::str
return value; return value;
} }
template<typename T, std::enable_if_t<std::is_integral<T>::value, bool> = true>
inline std::optional<T> FromCharsWithOptionalBase(std::string_view str, std::string_view* endptr = nullptr)
{
int base = 10;
if (str.starts_with("0x"))
{
base = 16;
str = str.substr(2);
}
else if (str.starts_with("0b"))
{
base = 2;
str = str.substr(1);
}
else if (str.starts_with("0") && str.length() > 1)
{
base = 8;
str = str.substr(1);
}
if (endptr)
return FromChars<T>(str, base, endptr);
else
return FromChars<T>(str, base);
}
template<typename T, std::enable_if_t<std::is_floating_point<T>::value, bool> = true> template<typename T, std::enable_if_t<std::is_floating_point<T>::value, bool> = true>
inline std::optional<T> FromChars(const std::string_view str) inline std::optional<T> FromChars(const std::string_view str)
{ {
@ -216,6 +242,7 @@ inline std::string ToChars(bool value, int base)
} }
/// Encode/decode hexadecimal byte buffers /// Encode/decode hexadecimal byte buffers
u8 DecodeHexDigit(char ch);
std::optional<std::vector<u8>> DecodeHex(const std::string_view str); std::optional<std::vector<u8>> DecodeHex(const std::string_view str);
std::string EncodeHex(const void* data, size_t length); std::string EncodeHex(const void* data, size_t length);
template<typename T> template<typename T>