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Store size in a local variable while unchanged

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This commit is contained in:
Victor Zverovich
2025-09-21 12:51:06 -07:00
parent c5e55972ae
commit 6b6cdd9405
1 changed files with 7 additions and 5 deletions
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12
include/fmt/base.h
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@@ -1844,15 +1844,17 @@ template <typename T> class buffer {
void
append(const U* begin, const U* end) {
while (begin != end) {
auto free_cap = capacity_ - size_;
auto size = size_;
auto free_cap = capacity_ - size;
auto count = to_unsigned(end - begin);
if (free_cap < count) {
grow_(*this, size_ + count);
free_cap = capacity_ - size_;
count = (count < free_cap) ? count : free_cap;
grow_(*this, size + count);
size = size_;
free_cap = capacity_ - size;
count = count < free_cap ? count : free_cap;
}
// A loop is faster than memcpy on small sizes.
T* out = ptr_ + size_;
T* out = ptr_ + size;
for (size_t i = 0; i < count; ++i) out[i] = begin[i];
size_ += count;
begin += count;