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value -> bigit

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This commit is contained in:
Victor Zverovich 2019-09-07 14:23:19 -07:00
parent 56b5c192a0
commit 6649b8e0ca
1 changed files with 14 additions and 7 deletions
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21
include/fmt/format-inl.h
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@ -468,16 +468,23 @@ FMT_FUNC fp get_cached_power(int min_exponent, int& pow10_exponent) {
class bigint {
private:
basic_memory_buffer<uint32_t> value_;
static FMT_CONSTEXPR_DECL const int radix = 32;
// A bigint is stored as an array of bigits (big digits), with bigit at index
// 0 being the least significant one.
using bigit = uint32_t;
basic_memory_buffer<bigit> bigits_;
static FMT_CONSTEXPR_DECL const int bigit_bits = bits<bigit>::value;
friend struct formatter<bigint>;
public:
explicit bigint(uint64_t n) {
value_.resize(2);
value_[0] = n & ~uint32_t(0);
value_[1] = static_cast<uint32_t>(n >> 32);
int num_bigits = bits<uint64_t>::value / bigit_bits;
bigits_.resize(num_bigits);
for (int i = 0; i < num_bigits; ++i) {
bigits_[i] = n & ~bigit(0);
n >>= bigit_bits;
}
}
bigint(const bigint&) = delete;
@ -862,8 +869,8 @@ template <> struct formatter<internal::bigint> {
format_context& ctx) {
auto out = ctx.out();
bool first = true;
for (auto i = n.value_.size(); i > 0; --i) {
auto value = n.value_[i - 1];
for (auto i = n.bigits_.size(); i > 0; --i) {
auto value = n.bigits_[i - 1];
if (first) {
if (value == 0 && i > 1) continue;
out = format_to(out, "{:x}", value);