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49 lines
1.0 KiB
49 lines
1.0 KiB
4 years ago
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#include "utils/format_int.hpp"
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#include <fmt/compile.h>
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#include <fmt/core.h>
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#include "utils/language.h"
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#include "utils/stdcompat/string_view.hpp"
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namespace devilution {
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std::string FormatInteger(int n)
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{
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constexpr size_t GroupSize = 3;
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char buf[40];
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char *begin = buf;
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const char *end = fmt::format_to(buf, FMT_COMPILE("{}"), n);
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const size_t len = end - begin;
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std::string out;
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const size_t prefixLen = n < 0 ? 1 : 0;
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const size_t numLen = len - prefixLen;
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if (numLen <= GroupSize) {
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out.append(begin, len);
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return out;
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}
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const string_view separator = _(/* TRANSLATORS: Thousands separator */ ",");
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out.reserve(len + separator.size() * (numLen - 1) / GroupSize);
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if (n < 0) {
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out += '-';
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++begin;
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}
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size_t mlen = numLen % GroupSize;
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if (mlen == 0)
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mlen = GroupSize;
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out.append(begin, mlen);
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begin += mlen;
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for (; begin != end; begin += GroupSize) {
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AppendStrView(out, separator);
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out.append(begin, GroupSize);
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}
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return out;
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}
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} // namespace devilution
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