mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
263 lines
7.5 KiB
C++
263 lines
7.5 KiB
C++
//===- NativeFormatting.cpp - Low level formatting helpers -------*- C++-*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/NativeFormatting.h"
|
|
|
|
#include "llvm/ADT/ArrayRef.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
#include "llvm/Support/Format.h"
|
|
|
|
using namespace llvm;
|
|
|
|
template<typename T, std::size_t N>
|
|
static int format_to_buffer(T Value, char (&Buffer)[N]) {
|
|
char *EndPtr = std::end(Buffer);
|
|
char *CurPtr = EndPtr;
|
|
|
|
do {
|
|
*--CurPtr = '0' + char(Value % 10);
|
|
Value /= 10;
|
|
} while (Value);
|
|
return EndPtr - CurPtr;
|
|
}
|
|
|
|
static void writeWithCommas(raw_ostream &S, ArrayRef<char> Buffer) {
|
|
assert(!Buffer.empty());
|
|
|
|
ArrayRef<char> ThisGroup;
|
|
int InitialDigits = ((Buffer.size() - 1) % 3) + 1;
|
|
ThisGroup = Buffer.take_front(InitialDigits);
|
|
S.write(ThisGroup.data(), ThisGroup.size());
|
|
|
|
Buffer = Buffer.drop_front(InitialDigits);
|
|
assert(Buffer.size() % 3 == 0);
|
|
while (!Buffer.empty()) {
|
|
S << ',';
|
|
ThisGroup = Buffer.take_front(3);
|
|
S.write(ThisGroup.data(), 3);
|
|
Buffer = Buffer.drop_front(3);
|
|
}
|
|
}
|
|
|
|
template <typename T>
|
|
static void write_unsigned_impl(raw_ostream &S, T N, size_t MinDigits,
|
|
IntegerStyle Style, bool IsNegative) {
|
|
static_assert(std::is_unsigned<T>::value, "Value is not unsigned!");
|
|
|
|
char NumberBuffer[128];
|
|
std::memset(NumberBuffer, '0', sizeof(NumberBuffer));
|
|
|
|
size_t Len = 0;
|
|
Len = format_to_buffer(N, NumberBuffer);
|
|
|
|
if (IsNegative)
|
|
S << '-';
|
|
|
|
if (Len < MinDigits && Style != IntegerStyle::Number) {
|
|
for (size_t I = Len; I < MinDigits; ++I)
|
|
S << '0';
|
|
}
|
|
|
|
if (Style == IntegerStyle::Number) {
|
|
writeWithCommas(S, ArrayRef<char>(std::end(NumberBuffer) - Len, Len));
|
|
} else {
|
|
S.write(std::end(NumberBuffer) - Len, Len);
|
|
}
|
|
}
|
|
|
|
template <typename T>
|
|
static void write_unsigned(raw_ostream &S, T N, size_t MinDigits,
|
|
IntegerStyle Style, bool IsNegative = false) {
|
|
// Output using 32-bit div/mod if possible.
|
|
if (N == static_cast<uint32_t>(N))
|
|
write_unsigned_impl(S, static_cast<uint32_t>(N), MinDigits, Style,
|
|
IsNegative);
|
|
else
|
|
write_unsigned_impl(S, N, MinDigits, Style, IsNegative);
|
|
}
|
|
|
|
template <typename T>
|
|
static void write_signed(raw_ostream &S, T N, size_t MinDigits,
|
|
IntegerStyle Style) {
|
|
static_assert(std::is_signed<T>::value, "Value is not signed!");
|
|
|
|
using UnsignedT = typename std::make_unsigned<T>::type;
|
|
|
|
if (N >= 0) {
|
|
write_unsigned(S, static_cast<UnsignedT>(N), MinDigits, Style);
|
|
return;
|
|
}
|
|
|
|
UnsignedT UN = -(UnsignedT)N;
|
|
write_unsigned(S, UN, MinDigits, Style, true);
|
|
}
|
|
|
|
void llvm::write_integer(raw_ostream &S, unsigned int N, size_t MinDigits,
|
|
IntegerStyle Style) {
|
|
write_unsigned(S, N, MinDigits, Style);
|
|
}
|
|
|
|
void llvm::write_integer(raw_ostream &S, int N, size_t MinDigits,
|
|
IntegerStyle Style) {
|
|
write_signed(S, N, MinDigits, Style);
|
|
}
|
|
|
|
void llvm::write_integer(raw_ostream &S, unsigned long N, size_t MinDigits,
|
|
IntegerStyle Style) {
|
|
write_unsigned(S, N, MinDigits, Style);
|
|
}
|
|
|
|
void llvm::write_integer(raw_ostream &S, long N, size_t MinDigits,
|
|
IntegerStyle Style) {
|
|
write_signed(S, N, MinDigits, Style);
|
|
}
|
|
|
|
void llvm::write_integer(raw_ostream &S, unsigned long long N, size_t MinDigits,
|
|
IntegerStyle Style) {
|
|
write_unsigned(S, N, MinDigits, Style);
|
|
}
|
|
|
|
void llvm::write_integer(raw_ostream &S, long long N, size_t MinDigits,
|
|
IntegerStyle Style) {
|
|
write_signed(S, N, MinDigits, Style);
|
|
}
|
|
|
|
void llvm::write_hex(raw_ostream &S, uint64_t N, HexPrintStyle Style,
|
|
Optional<size_t> Width) {
|
|
const size_t kMaxWidth = 128u;
|
|
|
|
size_t W = std::min(kMaxWidth, Width.getValueOr(0u));
|
|
|
|
unsigned Nibbles = (64 - countLeadingZeros(N) + 3) / 4;
|
|
bool Prefix = (Style == HexPrintStyle::PrefixLower ||
|
|
Style == HexPrintStyle::PrefixUpper);
|
|
bool Upper =
|
|
(Style == HexPrintStyle::Upper || Style == HexPrintStyle::PrefixUpper);
|
|
unsigned PrefixChars = Prefix ? 2 : 0;
|
|
unsigned NumChars =
|
|
std::max(static_cast<unsigned>(W), std::max(1u, Nibbles) + PrefixChars);
|
|
|
|
char NumberBuffer[kMaxWidth];
|
|
::memset(NumberBuffer, '0', llvm::array_lengthof(NumberBuffer));
|
|
if (Prefix)
|
|
NumberBuffer[1] = 'x';
|
|
char *EndPtr = NumberBuffer + NumChars;
|
|
char *CurPtr = EndPtr;
|
|
while (N) {
|
|
unsigned char x = static_cast<unsigned char>(N) % 16;
|
|
*--CurPtr = hexdigit(x, !Upper);
|
|
N /= 16;
|
|
}
|
|
|
|
S.write(NumberBuffer, NumChars);
|
|
}
|
|
|
|
void llvm::write_double(raw_ostream &S, double N, FloatStyle Style,
|
|
Optional<size_t> Precision) {
|
|
size_t Prec = Precision.getValueOr(getDefaultPrecision(Style));
|
|
|
|
if (std::isnan(N)) {
|
|
S << "nan";
|
|
return;
|
|
} else if (std::isinf(N)) {
|
|
S << "INF";
|
|
return;
|
|
}
|
|
|
|
char Letter;
|
|
if (Style == FloatStyle::Exponent)
|
|
Letter = 'e';
|
|
else if (Style == FloatStyle::ExponentUpper)
|
|
Letter = 'E';
|
|
else
|
|
Letter = 'f';
|
|
|
|
SmallString<8> Spec;
|
|
llvm::raw_svector_ostream Out(Spec);
|
|
Out << "%." << Prec << Letter;
|
|
|
|
if (Style == FloatStyle::Exponent || Style == FloatStyle::ExponentUpper) {
|
|
#ifdef _WIN32
|
|
// On MSVCRT and compatible, output of %e is incompatible to Posix
|
|
// by default. Number of exponent digits should be at least 2. "%+03d"
|
|
// FIXME: Implement our formatter to here or Support/Format.h!
|
|
#if defined(__MINGW32__)
|
|
// FIXME: It should be generic to C++11.
|
|
if (N == 0.0 && std::signbit(N)) {
|
|
char NegativeZero[] = "-0.000000e+00";
|
|
if (Style == FloatStyle::ExponentUpper)
|
|
NegativeZero[strlen(NegativeZero) - 4] = 'E';
|
|
S << NegativeZero;
|
|
return;
|
|
}
|
|
#else
|
|
int fpcl = _fpclass(N);
|
|
|
|
// negative zero
|
|
if (fpcl == _FPCLASS_NZ) {
|
|
char NegativeZero[] = "-0.000000e+00";
|
|
if (Style == FloatStyle::ExponentUpper)
|
|
NegativeZero[strlen(NegativeZero) - 4] = 'E';
|
|
S << NegativeZero;
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
char buf[32];
|
|
unsigned len;
|
|
len = format(Spec.c_str(), N).snprint(buf, sizeof(buf));
|
|
if (len <= sizeof(buf) - 2) {
|
|
if (len >= 5 && (buf[len - 5] == 'e' || buf[len - 5] == 'E') &&
|
|
buf[len - 3] == '0') {
|
|
int cs = buf[len - 4];
|
|
if (cs == '+' || cs == '-') {
|
|
int c1 = buf[len - 2];
|
|
int c0 = buf[len - 1];
|
|
if (isdigit(static_cast<unsigned char>(c1)) &&
|
|
isdigit(static_cast<unsigned char>(c0))) {
|
|
// Trim leading '0': "...e+012" -> "...e+12\0"
|
|
buf[len - 3] = c1;
|
|
buf[len - 2] = c0;
|
|
buf[--len] = 0;
|
|
}
|
|
}
|
|
}
|
|
S << buf;
|
|
return;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (Style == FloatStyle::Percent)
|
|
N *= 100.0;
|
|
|
|
char Buf[32];
|
|
format(Spec.c_str(), N).snprint(Buf, sizeof(Buf));
|
|
S << Buf;
|
|
if (Style == FloatStyle::Percent)
|
|
S << '%';
|
|
}
|
|
|
|
bool llvm::isPrefixedHexStyle(HexPrintStyle S) {
|
|
return (S == HexPrintStyle::PrefixLower || S == HexPrintStyle::PrefixUpper);
|
|
}
|
|
|
|
size_t llvm::getDefaultPrecision(FloatStyle Style) {
|
|
switch (Style) {
|
|
case FloatStyle::Exponent:
|
|
case FloatStyle::ExponentUpper:
|
|
return 6; // Number of decimal places.
|
|
case FloatStyle::Fixed:
|
|
case FloatStyle::Percent:
|
|
return 2; // Number of decimal places.
|
|
}
|
|
LLVM_BUILTIN_UNREACHABLE;
|
|
}
|