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fmt::format() optimization (fmt::unveil template)

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This commit is contained in:
Nekotekina 2015-01-19 01:54:56 +03:00
parent 87f1a9d9dc
commit 0d28f378a7
20 changed files with 343 additions and 309 deletions
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102
Utilities/StrFmt.cpp
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@ -3,7 +3,7 @@
std::string u128::to_hex() const
{
return fmt::Format("%016llx%016llx", _u64[1], _u64[0]);
return fmt::format("%016llx%016llx", _u64[1], _u64[0]);
}
std::string u128::to_xyzw() const
@ -11,6 +11,106 @@ std::string u128::to_xyzw() const
return fmt::Format("x: %g y: %g z: %g w: %g", _f[3], _f[2], _f[1], _f[0]);
}
std::string fmt::detail::to_hex(u64 value, size_t count)
{
assert(count - 1 < 16);
count = std::max<u64>(count, 16 - cntlz64(value) / 4);
char res[16] = {};
for (size_t i = count - 1; ~i; i--, value /= 16)
{
res[i] = "0123456789abcdef"[value % 16];
}
return std::string(res, count);
}
size_t fmt::detail::get_fmt_start(const char* fmt, size_t len)
{
for (size_t i = 0; i < len; i++)
{
if (fmt[i] == '%')
{
return i;
}
}
return len;
}
size_t fmt::detail::get_fmt_len(const char* fmt, size_t len)
{
assert(len >= 2 && fmt[0] == '%');
size_t res = 2;
if (fmt[1] == '.' || fmt[1] == '0')
{
assert(len >= 4 && fmt[2] - '1' < 9);
res += 2;
fmt += 2;
len -= 2;
if (fmt[1] == '1')
{
assert(len >= 3 && fmt[2] - '0' < 7);
res++;
fmt++;
len--;
}
}
if (fmt[1] == 'l')
{
assert(len >= 3);
res++;
fmt++;
len--;
}
if (fmt[1] == 'l')
{
assert(len >= 3);
res++;
fmt++;
len--;
}
return res;
}
size_t fmt::detail::get_fmt_precision(const char* fmt, size_t len)
{
assert(len >= 2);
if (fmt[1] == '.' || fmt[1] == '0')
{
assert(len >= 4 && fmt[2] - '1' < 9);
if (fmt[2] == '1')
{
assert(len >= 5 && fmt[3] - '0' < 7);
return 10 + fmt[3] - '0';
}
return fmt[2] - '0';
}
return 1;
}
std::string fmt::detail::format(const char* fmt, size_t len)
{
const size_t fmt_start = get_fmt_start(fmt, len);
if (fmt_start != len)
{
throw "Excessive formatting: " + std::string(fmt, len);
}
return std::string(fmt, len);
}
extern const std::string fmt::placeholder = "???";
std::string replace_first(const std::string& src, const std::string& from, const std::string& to)