mirror of
https://github.com/gabime/spdlog.git
synced 2024-12-25 18:11:33 +08:00
Updated fmt.cpp to 6.1.2
This commit is contained in:
gabime
parent
284e6a80ac
commit
bc42415ceb
149
src/fmt.cpp
149
src/fmt.cpp
@ -9,11 +9,127 @@
|
||||
#if !defined(SPDLOG_FMT_EXTERNAL)
|
||||
#include "spdlog/fmt/bundled/format-inl.h"
|
||||
|
||||
|
||||
FMT_BEGIN_NAMESPACE
|
||||
namespace internal {
|
||||
|
||||
template <typename T>
|
||||
int format_float(char* buf, std::size_t size, const char* format, int precision,
|
||||
T value) {
|
||||
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
|
||||
if (precision > 100000)
|
||||
throw std::runtime_error(
|
||||
"fuzz mode - avoid large allocation inside snprintf");
|
||||
#endif
|
||||
// Suppress the warning about nonliteral format string.
|
||||
auto snprintf_ptr = FMT_SNPRINTF;
|
||||
return precision < 0 ? snprintf_ptr(buf, size, format, value)
|
||||
: snprintf_ptr(buf, size, format, precision, value);
|
||||
}
|
||||
struct sprintf_specs {
|
||||
int precision;
|
||||
char type;
|
||||
bool alt : 1;
|
||||
|
||||
template <typename Char>
|
||||
constexpr sprintf_specs(basic_format_specs<Char> specs)
|
||||
: precision(specs.precision), type(specs.type), alt(specs.alt) {}
|
||||
|
||||
constexpr bool has_precision() const { return precision >= 0; }
|
||||
};
|
||||
|
||||
// This is deprecated and is kept only to preserve ABI compatibility.
|
||||
template <typename Double>
|
||||
char* sprintf_format(Double value, internal::buffer<char>& buf,
|
||||
sprintf_specs specs) {
|
||||
// Buffer capacity must be non-zero, otherwise MSVC's vsnprintf_s will fail.
|
||||
FMT_ASSERT(buf.capacity() != 0, "empty buffer");
|
||||
|
||||
// Build format string.
|
||||
enum { max_format_size = 10 }; // longest format: %#-*.*Lg
|
||||
char format[max_format_size];
|
||||
char* format_ptr = format;
|
||||
*format_ptr++ = '%';
|
||||
if (specs.alt || !specs.type) *format_ptr++ = '#';
|
||||
if (specs.precision >= 0) {
|
||||
*format_ptr++ = '.';
|
||||
*format_ptr++ = '*';
|
||||
}
|
||||
if (std::is_same<Double, long double>::value) *format_ptr++ = 'L';
|
||||
|
||||
char type = specs.type;
|
||||
|
||||
if (type == '%')
|
||||
type = 'f';
|
||||
else if (type == 0 || type == 'n')
|
||||
type = 'g';
|
||||
#if FMT_MSC_VER
|
||||
if (type == 'F') {
|
||||
// MSVC's printf doesn't support 'F'.
|
||||
type = 'f';
|
||||
}
|
||||
#endif
|
||||
*format_ptr++ = type;
|
||||
*format_ptr = '\0';
|
||||
|
||||
// Format using snprintf.
|
||||
char* start = nullptr;
|
||||
char* decimal_point_pos = nullptr;
|
||||
for (;;) {
|
||||
std::size_t buffer_size = buf.capacity();
|
||||
start = &buf[0];
|
||||
int result =
|
||||
format_float(start, buffer_size, format, specs.precision, value);
|
||||
if (result >= 0) {
|
||||
unsigned n = internal::to_unsigned(result);
|
||||
if (n < buf.capacity()) {
|
||||
// Find the decimal point.
|
||||
auto p = buf.data(), end = p + n;
|
||||
if (*p == '+' || *p == '-') ++p;
|
||||
if (specs.type != 'a' && specs.type != 'A') {
|
||||
while (p < end && *p >= '0' && *p <= '9') ++p;
|
||||
if (p < end && *p != 'e' && *p != 'E') {
|
||||
decimal_point_pos = p;
|
||||
if (!specs.type) {
|
||||
// Keep only one trailing zero after the decimal point.
|
||||
++p;
|
||||
if (*p == '0') ++p;
|
||||
while (p != end && *p >= '1' && *p <= '9') ++p;
|
||||
char* where = p;
|
||||
while (p != end && *p == '0') ++p;
|
||||
if (p == end || *p < '0' || *p > '9') {
|
||||
if (p != end) std::memmove(where, p, to_unsigned(end - p));
|
||||
n -= static_cast<unsigned>(p - where);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
buf.resize(n);
|
||||
break; // The buffer is large enough - continue with formatting.
|
||||
}
|
||||
buf.reserve(n + 1);
|
||||
} else {
|
||||
// If result is negative we ask to increase the capacity by at least 1,
|
||||
// but as std::vector, the buffer grows exponentially.
|
||||
buf.reserve(buf.capacity() + 1);
|
||||
}
|
||||
}
|
||||
return decimal_point_pos;
|
||||
}
|
||||
} // namespace internal
|
||||
|
||||
template FMT_API char* internal::sprintf_format(double, internal::buffer<char>&,
|
||||
sprintf_specs);
|
||||
template FMT_API char* internal::sprintf_format(long double,
|
||||
internal::buffer<char>&,
|
||||
sprintf_specs);
|
||||
|
||||
template struct FMT_API internal::basic_data<void>;
|
||||
|
||||
// Workaround a bug in MSVC2013 that prevents instantiation of format_float.
|
||||
int (*instantiate_format_float)(double, int, internal::float_specs, internal::buffer<char> &) = internal::format_float;
|
||||
int (*instantiate_format_float)(double, int, internal::float_specs,
|
||||
internal::buffer<char>&) =
|
||||
internal::format_float;
|
||||
|
||||
#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
|
||||
template FMT_API internal::locale_ref::locale_ref(const std::locale& loc);
|
||||
@ -28,16 +144,26 @@ template FMT_API char internal::decimal_point_impl(locale_ref);
|
||||
|
||||
template FMT_API void internal::buffer<char>::append(const char*, const char*);
|
||||
|
||||
template FMT_API void internal::arg_map<format_context>::init(const basic_format_args<format_context> &args);
|
||||
template FMT_API void internal::arg_map<format_context>::init(
|
||||
const basic_format_args<format_context>& args);
|
||||
|
||||
template FMT_API std::string internal::vformat<char>(string_view, basic_format_args<format_context>);
|
||||
template FMT_API std::string internal::vformat<char>(
|
||||
string_view, basic_format_args<format_context>);
|
||||
|
||||
template FMT_API format_context::iterator internal::vformat_to(internal::buffer<char> &, string_view, basic_format_args<format_context>);
|
||||
template FMT_API format_context::iterator internal::vformat_to(
|
||||
internal::buffer<char>&, string_view, basic_format_args<format_context>);
|
||||
|
||||
template FMT_API int internal::snprintf_float(double, int, internal::float_specs, internal::buffer<char> &);
|
||||
template FMT_API int internal::snprintf_float(long double, int, internal::float_specs, internal::buffer<char> &);
|
||||
template FMT_API int internal::format_float(double, int, internal::float_specs, internal::buffer<char> &);
|
||||
template FMT_API int internal::format_float(long double, int, internal::float_specs, internal::buffer<char> &);
|
||||
template FMT_API int internal::snprintf_float(double, int,
|
||||
internal::float_specs,
|
||||
internal::buffer<char>&);
|
||||
template FMT_API int internal::snprintf_float(long double, int,
|
||||
internal::float_specs,
|
||||
internal::buffer<char>&);
|
||||
template FMT_API int internal::format_float(double, int, internal::float_specs,
|
||||
internal::buffer<char>&);
|
||||
template FMT_API int internal::format_float(long double, int,
|
||||
internal::float_specs,
|
||||
internal::buffer<char>&);
|
||||
|
||||
// Explicit instantiations for wchar_t.
|
||||
|
||||
@ -45,9 +171,12 @@ template FMT_API std::string internal::grouping_impl<wchar_t>(locale_ref);
|
||||
template FMT_API wchar_t internal::thousands_sep_impl(locale_ref);
|
||||
template FMT_API wchar_t internal::decimal_point_impl(locale_ref);
|
||||
|
||||
template FMT_API void internal::buffer<wchar_t>::append(const wchar_t *, const wchar_t *);
|
||||
template FMT_API void internal::buffer<wchar_t>::append(const wchar_t*,
|
||||
const wchar_t*);
|
||||
|
||||
template FMT_API std::wstring internal::vformat<wchar_t>(wstring_view, basic_format_args<wformat_context>);
|
||||
template FMT_API std::wstring internal::vformat<wchar_t>(
|
||||
wstring_view, basic_format_args<wformat_context>);
|
||||
FMT_END_NAMESPACE
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user