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LibWeb: Add basic parse floating point number function

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Bastiaan van der Plaat 2023-11-15 19:54:01 +01:00 • committed by Sam Atkins
parent 3175557cb8
commit 761d824b72
5 changed files with 42 additions and 32 deletions
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13
Userland/Libraries/LibWeb/HTML/Numbers.cpp
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@ -7,6 +7,7 @@
#include <AK/GenericLexer.h>
#include <LibWeb/HTML/Numbers.h>
#include <LibWeb/Infra/CharacterTypes.h>
#include <math.h>
namespace Web::HTML {
@ -79,4 +80,16 @@ Optional<u32> parse_non_negative_integer(StringView string)
return static_cast<u32>(optional_value.value());
}
// https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#rules-for-parsing-floating-point-number-values
Optional<double> parse_floating_point_number(StringView string)
{
// FIXME: Implement spec compliant floating point number parsing
auto maybe_double = MUST(String::from_utf8(string)).to_number<double>(TrimWhitespace::Yes);
if (!maybe_double.has_value())
return {};
if (!isfinite(maybe_double.value()))
return {};
return maybe_double.value();
}
}