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Reduce bigint capacity

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This commit is contained in:
Victor Zverovich 2019-10-13 14:06:38 -07:00
parent a5abe5d95c
commit 646966e973
1 changed files with 5 additions and 4 deletions
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9
include/fmt/format-inl.h
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@ -17,7 +17,6 @@
#include <climits> #include <climits>
#include <cmath> #include <cmath>
#include <cstdarg> #include <cstdarg>
#include <cstddef> // for std::ptrdiff_t
#include <cstring> // for std::memmove #include <cstring> // for std::memmove
#include <cwchar> #include <cwchar>
#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR) #if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
@ -495,7 +494,8 @@ class bigint {
// 0 being the least significant one. // 0 being the least significant one.
using bigit = uint32_t; using bigit = uint32_t;
using double_bigit = uint64_t; using double_bigit = uint64_t;
basic_memory_buffer<bigit> bigits_; enum { bigits_capacity = 32 };
basic_memory_buffer<bigit, bigits_capacity> bigits_;
int exp_; int exp_;
static FMT_CONSTEXPR_DECL const int bigit_bits = bits<bigit>::value; static FMT_CONSTEXPR_DECL const int bigit_bits = bits<bigit>::value;
@ -559,6 +559,7 @@ class bigint {
public: public:
bigint() : exp_(0) {} bigint() : exp_(0) {}
explicit bigint(uint64_t n) { assign(n); } explicit bigint(uint64_t n) { assign(n); }
~bigint() { assert(bigits_.capacity() <= bigits_capacity); }
bigint(const bigint&) = delete; bigint(const bigint&) = delete;
void operator=(const bigint&) = delete; void operator=(const bigint&) = delete;
@ -664,7 +665,7 @@ class bigint {
} }
void square() { void square() {
basic_memory_buffer<bigit> n(std::move(bigits_)); basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
int num_bigits = static_cast<int>(bigits_.size()); int num_bigits = static_cast<int>(bigits_.size());
int num_result_bigits = 2 * num_bigits; int num_result_bigits = 2 * num_bigits;
bigits_.resize(num_result_bigits); bigits_.resize(num_result_bigits);
@ -941,7 +942,7 @@ FMT_FUNC void fallback_format(Double v, buffer<char>& buf, int& exp10) {
fp fp_value(v); fp fp_value(v);
// Shift to account for unequal gaps when lower boundary is 2 times closer. // Shift to account for unequal gaps when lower boundary is 2 times closer.
// TODO: handle denormals // TODO: handle denormals
int shift = fp_value.f == 1 ? 1 : 0; int shift = 0; //fp_value.f == 1 ? 1 : 0;
bigint numerator; // 2 * R in (FPP)^2. bigint numerator; // 2 * R in (FPP)^2.
bigint denominator; // 2 * S in (FPP)^2. bigint denominator; // 2 * S in (FPP)^2.
bigint lower; // (M^- in (FPP)^2). bigint lower; // (M^- in (FPP)^2).