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LibCrypto: Add the UnsignedBigInteger::Word alias

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This makes it clearer which variables are operating on words instead
of directly operating on raw values.
This commit is contained in:
DexesTTP
2021-05-12 13:25:55 +02:00
committed by Linus Groh
parent 5963f6f9ff
commit f4e6f58cc6
Notes: sideshowbarker 2024-07-18 18:13:48 +09:00 
Author: https://github.com/Dexesttp
Commit: https://github.com/SerenityOS/serenity/commit/f4e6f58cc64
Pull-request: https://github.com/SerenityOS/serenity/pull/7067
Reviewed-by: https://github.com/alimpfard
5 changed files with 16 additions and 15 deletions
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17
Userland/Libraries/LibCrypto/BigInt/UnsignedBigInteger.h
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@@ -19,9 +19,12 @@ constexpr size_t STARTING_WORD_SIZE = 512;
class UnsignedBigInteger {
public:
UnsignedBigInteger(u32 x) { m_words.append(x); }
using Word = u32;
static constexpr size_t BITS_IN_WORD = 32;
explicit UnsignedBigInteger(Vector<u32, STARTING_WORD_SIZE>&& words)
UnsignedBigInteger(Word x) { m_words.append(x); }
explicit UnsignedBigInteger(Vector<Word, STARTING_WORD_SIZE>&& words)
: m_words(move(words))
{
}
@@ -43,10 +46,10 @@ public:
static UnsignedBigInteger from_base10(const String& str);
String to_base10() const;
const Vector<u32, STARTING_WORD_SIZE>& words() const { return m_words; }
const Vector<Word, STARTING_WORD_SIZE>& words() const { return m_words; }
void set_to_0();
void set_to(u32 other);
void set_to(Word other);
void set_to(const UnsignedBigInteger& other);
void invalidate()
@@ -81,11 +84,9 @@ public:
private:
friend class UnsignedBigIntegerAlgorithms;
static constexpr size_t BITS_IN_WORD = 32;
// Little endian
// m_word[0] + m_word[1] * 256 + m_word[2] * 65536 + ...
Vector<u32, STARTING_WORD_SIZE> m_words;
// m_word[0] + m_word[1] * Word::MAX + m_word[2] * Word::MAX * Word::MAX + ...
Vector<Word, STARTING_WORD_SIZE> m_words;
// Used to indicate a negative result, or a result of an invalid operation
bool m_is_invalid { false };