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AK: Generalize AK::String::to_int() for more types

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Sahan Fernando 2020-12-11 00:17:30 +11:00 • committed by Andreas Kling
parent 39364bdda4
commit 37df4bbd90
8 changed files with 93 additions and 24 deletions
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30
AK/StringUtils.cpp
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@ -96,7 +96,8 @@ bool matches(const StringView& str, const StringView& mask, CaseSensitivity case
return string_ptr == string_end && mask_ptr == mask_end;
}
Optional<int> convert_to_int(const StringView& str)
template<typename T>
Optional<T> convert_to_int(const StringView& str)
{
auto str_trimmed = str.trim_whitespace();
if (str_trimmed.is_empty())
@ -113,7 +114,7 @@ Optional<int> convert_to_int(const StringView& str)
negative = (characters[0] == '-');
}
int value = 0;
T value = 0;
for (; i < str_trimmed.length(); i++) {
if (characters[i] < '0' || characters[i] > '9')
return {};
@ -123,13 +124,19 @@ Optional<int> convert_to_int(const StringView& str)
return negative ? -value : value;
}
Optional<unsigned> convert_to_uint(const StringView& str)
template Optional<i8> convert_to_int(const StringView& str);
template Optional<i16> convert_to_int(const StringView& str);
template Optional<i32> convert_to_int(const StringView& str);
template Optional<i64> convert_to_int(const StringView& str);
template<typename T>
Optional<T> convert_to_uint(const StringView& str)
{
auto str_trimmed = str.trim_whitespace();
if (str_trimmed.is_empty())
return {};
unsigned value = 0;
T value = 0;
const auto characters = str_trimmed.characters_without_null_termination();
for (size_t i = 0; i < str_trimmed.length(); i++) {
@ -142,13 +149,19 @@ Optional<unsigned> convert_to_uint(const StringView& str)
return value;
}
Optional<unsigned> convert_to_uint_from_hex(const StringView& str)
template Optional<u8> convert_to_uint(const StringView& str);
template Optional<u16> convert_to_uint(const StringView& str);
template Optional<u32> convert_to_uint(const StringView& str);
template Optional<u64> convert_to_uint(const StringView& str);
template<typename T>
Optional<T> convert_to_uint_from_hex(const StringView& str)
{
auto str_trimmed = str.trim_whitespace();
if (str_trimmed.is_empty())
return {};
unsigned value = 0;
T value = 0;
const auto count = str_trimmed.length();
for (size_t i = 0; i < count; i++) {
@ -170,6 +183,11 @@ Optional<unsigned> convert_to_uint_from_hex(const StringView& str)
return value;
}
template Optional<u8> convert_to_uint_from_hex(const StringView& str);
template Optional<u16> convert_to_uint_from_hex(const StringView& str);
template Optional<u32> convert_to_uint_from_hex(const StringView& str);
template Optional<u64> convert_to_uint_from_hex(const StringView& str);
static inline char to_lowercase(char c)
{
if (c >= 'A' && c <= 'Z')