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KytyPS5/src/libs/guestPrintf.cpp
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//
// Original algorithm is from:
// https://github.com/mpaland/printf
// Marco Paland (info@paland.com)
// 2014-2019, PALANDesign Hannover, Germany
// licensed under The MIT License (MIT)
#include "libs/guestPrintf.h"
#include "common/abi.h"
#include "common/assert.h"
#include "common/common.h"
#include "common/logging/log.h"
#include "common/stringUtils.h"
#include "libs/vaContext.h"
#include <cfloat>
#include <cmath>
#include <vector>
namespace Libs {
constexpr uint32_t FLAGS_ZEROPAD = (1U << 0U);
constexpr uint32_t FLAGS_LEFT = (1U << 1U);
constexpr uint32_t FLAGS_PLUS = (1U << 2U);
constexpr uint32_t FLAGS_SPACE = (1U << 3U);
constexpr uint32_t FLAGS_HASH = (1U << 4U);
constexpr uint32_t FLAGS_UPPERCASE = (1U << 5U);
constexpr uint32_t FLAGS_CHAR = (1U << 6U);
constexpr uint32_t FLAGS_SHORT = (1U << 7U);
constexpr uint32_t FLAGS_LONG = (1U << 8U);
constexpr uint32_t FLAGS_LONG_LONG = (1U << 9U);
constexpr uint32_t FLAGS_PRECISION = (1U << 10U);
constexpr uint32_t FLAGS_ADAPT_EXP = (1U << 11U);
constexpr size_t PRINTF_NTOA_BUFFER_SIZE = 32U;
constexpr size_t PRINTF_FTOA_BUFFER_SIZE = 32U;
constexpr double PRINTF_MAX_FLOAT = 1e9;
constexpr uint32_t PRINTF_DEFAULT_FLOAT_PRECISION = 6U;
using out_fct_type = void (*)(char character, std::vector<char>* buffer, size_t idx,
size_t /*maxlen*/);
// internal null output
static inline void _out_null(char character, std::vector<char>* buffer, size_t /*idx*/,
size_t /*maxlen*/) {
buffer->push_back(character);
}
static inline bool _is_digit(char ch) {
return (ch >= '0') && (ch <= '9');
}
static unsigned int _atoi(const char** str) {
unsigned int i = 0U;
while (_is_digit(**str)) {
i = i * 10U + static_cast<unsigned int>(*((*str)++) - '0');
}
return i;
}
static size_t _out_rev(out_fct_type out, std::vector<char>* buffer, size_t idx, size_t maxlen,
const char* buf, size_t len, unsigned int width, unsigned int flags) {
const size_t start_idx = idx;
// pad spaces up to given width
if ((flags & FLAGS_LEFT) == 0 && (flags & FLAGS_ZEROPAD) == 0) {
for (size_t i = len; i < width; i++) {
out(' ', buffer, idx++, maxlen);
}
}
// reverse string
while (len != 0u) {
out(buf[--len], buffer, idx++, maxlen);
}
// append pad spaces up to given width
if ((flags & FLAGS_LEFT) != 0u) {
while (idx - start_idx < width) {
out(' ', buffer, idx++, maxlen);
}
}
return idx;
}
// internal itoa format
static size_t _ntoa_format(out_fct_type out, std::vector<char>* buffer, size_t idx, size_t maxlen,
char* buf, size_t len, bool negative, unsigned int base,
unsigned int prec, unsigned int width, unsigned int flags) {
// pad leading zeros
if ((flags & FLAGS_LEFT) == 0u) {
if ((width != 0u) && ((flags & FLAGS_ZEROPAD) != 0u) &&
(negative || ((flags & (FLAGS_PLUS | FLAGS_SPACE)) != 0u))) {
width--;
}
while ((len < prec) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = '0';
}
while (((flags & FLAGS_ZEROPAD) != 0u) && (len < width) &&
(len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = '0';
}
}
// handle hash
if ((flags & FLAGS_HASH) != 0u) {
if (((flags & FLAGS_PRECISION) == 0u) && (len != 0u) && ((len == prec) || (len == width))) {
len--;
if ((len != 0u) && (base == 16U)) {
len--;
}
}
if ((base == 16U) && ((flags & FLAGS_UPPERCASE) == 0u) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'x';
} else if ((base == 16U) && ((flags & FLAGS_UPPERCASE) != 0u) &&
(len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'X';
} else if ((base == 2U) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
buf[len++] = 'b';
}
if (len < PRINTF_NTOA_BUFFER_SIZE) {
buf[len++] = '0';
}
}
if (len < PRINTF_NTOA_BUFFER_SIZE) {
if (negative) {
buf[len++] = '-';
} else if ((flags & FLAGS_PLUS) != 0u) {
buf[len++] = '+'; // ignore the space if the '+' exists
} else if ((flags & FLAGS_SPACE) != 0u) {
buf[len++] = ' ';
}
}
return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
}
static size_t _ntoa_long_long(out_fct_type out, std::vector<char>* buffer, size_t idx,
size_t maxlen, uint64_t value, bool negative, uint64_t base,
unsigned int prec, unsigned int width, unsigned int flags) {
char buf[PRINTF_NTOA_BUFFER_SIZE];
size_t len = 0U;
// no hash for 0 values
if (value == 0u) {
flags &= ~FLAGS_HASH;
}
// write if precision != 0 and value is != 0
if (((flags & FLAGS_PRECISION) == 0u) || (value != 0u)) {
do {
const char digit = static_cast<char>(value % base);
// NOLINTNEXTLINE(bugprone-narrowing-conversions,cppcoreguidelines-narrowing-conversions)
buf[len++] = digit < 10 ? '0' + digit
: ((flags & FLAGS_UPPERCASE) != 0u ? 'A' : 'a') + digit - 10;
value /= base;
} while ((value != 0u) && (len < PRINTF_NTOA_BUFFER_SIZE));
}
return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative,
static_cast<unsigned int>(base), prec, width, flags);
}
// internal itoa for 'long' type
static size_t _ntoa_long(out_fct_type out, std::vector<char>* buffer, size_t idx, size_t maxlen,
uint32_t value, bool negative, uint32_t base, unsigned int prec,
unsigned int width, unsigned int flags) {
char buf[PRINTF_NTOA_BUFFER_SIZE];
size_t len = 0U;
// no hash for 0 values
if (value == 0u) {
flags &= ~FLAGS_HASH;
}
// write if precision != 0 and value is != 0
if (((flags & FLAGS_PRECISION) == 0u) || (value != 0u)) {
do {
char digit = static_cast<char>(value % base);
// NOLINTNEXTLINE(bugprone-narrowing-conversions,cppcoreguidelines-narrowing-conversions)
buf[len++] = digit < 10 ? '0' + digit
: ((flags & FLAGS_UPPERCASE) != 0u ? 'A' : 'a') + digit - 10;
value /= base;
} while ((value != 0u) && (len < PRINTF_NTOA_BUFFER_SIZE));
}
return _ntoa_format(out, buffer, idx, maxlen, buf, len, negative,
static_cast<unsigned int>(base), prec, width, flags);
}
static size_t _etoa(out_fct_type out, std::vector<char>* buffer, size_t idx, size_t maxlen,
double value, unsigned int prec, unsigned int width, unsigned int flags);
// internal ftoa for fixed decimal floating point
// NOLINTNEXTLINE(readability-function-cognitive-complexity)
static size_t _ftoa(out_fct_type out, std::vector<char>* buffer, size_t idx, size_t maxlen,
double value, unsigned int prec, unsigned int width, unsigned int flags) {
char buf[PRINTF_FTOA_BUFFER_SIZE];
size_t len = 0U;
double diff = 0.0;
// powers of 10
static const double pow10[] = {1, 10, 100, 1000, 10000,
100000, 1000000, 10000000, 100000000, 1000000000};
// test for special values
if (value != value) {
return _out_rev(out, buffer, idx, maxlen, "nan", 3, width, flags);
}
if (value < -DBL_MAX) {
return _out_rev(out, buffer, idx, maxlen, "fni-", 4, width, flags);
}
if (value > DBL_MAX) {
return _out_rev(out, buffer, idx, maxlen, (flags & FLAGS_PLUS) != 0u ? "fni+" : "fni",
(flags & FLAGS_PLUS) != 0u ? 4U : 3U, width, flags);
}
// test for very large values
// standard printf behavior is to print EVERY whole number digit -- which could be 100s of
// characters overflowing your buffers == bad
if ((value > PRINTF_MAX_FLOAT) || (value < -PRINTF_MAX_FLOAT)) {
return _etoa(out, buffer, idx, maxlen, value, prec, width, flags);
}
// test for negative
bool negative = false;
if (value < 0) {
negative = true;
value = 0 - value;
}
// set default precision, if not set explicitly
if ((flags & FLAGS_PRECISION) == 0u) {
prec = PRINTF_DEFAULT_FLOAT_PRECISION;
}
// limit precision to 9, cause a prec >= 10 can lead to overflow errors
while ((len < PRINTF_FTOA_BUFFER_SIZE) && (prec > 9U)) {
buf[len++] = '0';
prec--;
}
int whole = static_cast<int>(value);
double tmp = (value - whole) * pow10[prec];
auto frac = static_cast<uint32_t>(tmp);
diff = tmp - frac;
if (diff > 0.5) {
++frac;
// handle rollover, e.g. case 0.99 with prec 1 is 1.0
if (frac >= pow10[prec]) {
frac = 0;
++whole;
}
} else if (diff < 0.5) {
} else if ((frac == 0U) || ((frac & 1U) != 0u)) {
// if halfway, round up if odd OR if last digit is 0
++frac;
}
if (prec == 0U) {
diff = value - static_cast<double>(whole);
if ((!(diff < 0.5) || (diff > 0.5)) && ((static_cast<uint32_t>(whole) & 1u) != 0)) {
// exactly 0.5 and ODD, then round up
// 1.5 -> 2, but 2.5 -> 2
++whole;
}
} else {
unsigned int count = prec;
// now do fractional part, as an unsigned number
while (len < PRINTF_FTOA_BUFFER_SIZE) {
--count;
buf[len++] = static_cast<char>(48U + (frac % 10U));
if ((frac /= 10U) == 0u) {
break;
}
}
// add extra 0s
while ((len < PRINTF_FTOA_BUFFER_SIZE) && (count-- > 0U)) {
buf[len++] = '0';
}
if (len < PRINTF_FTOA_BUFFER_SIZE) {
// add decimal
buf[len++] = '.';
}
}
// do whole part, number is reversed
while (len < PRINTF_FTOA_BUFFER_SIZE) {
buf[len++] = static_cast<char>(48 + (whole % 10));
if ((whole /= 10) == 0) {
break;
}
}
// pad leading zeros
if (((flags & FLAGS_LEFT) == 0u) && ((flags & FLAGS_ZEROPAD) != 0u)) {
if ((width != 0u) && (negative || ((flags & (FLAGS_PLUS | FLAGS_SPACE)) != 0u))) {
width--;
}
while ((len < width) && (len < PRINTF_FTOA_BUFFER_SIZE)) {
buf[len++] = '0';
}
}
if (len < PRINTF_FTOA_BUFFER_SIZE) {
if (negative) {
buf[len++] = '-';
} else if ((flags & FLAGS_PLUS) != 0u) {
buf[len++] = '+'; // ignore the space if the '+' exists
} else if ((flags & FLAGS_SPACE) != 0u) {
buf[len++] = ' ';
}
}
return _out_rev(out, buffer, idx, maxlen, buf, len, width, flags);
}
// internal ftoa variant for exponential floating-point type, contributed by Martijn Jasperse
// <m.jasperse@gmail.com>
static size_t _etoa(out_fct_type out, std::vector<char>* buffer, size_t idx, size_t maxlen,
double value, unsigned int prec, unsigned int width, unsigned int flags) {
// check for NaN and special values
if ((value != value) || (value > DBL_MAX) || (value < -DBL_MAX)) {
return _ftoa(out, buffer, idx, maxlen, value, prec, width, flags);
}
// determine the sign
const bool negative = value < 0;
if (negative) {
value = -value;
}
// default precision
if ((flags & FLAGS_PRECISION) == 0u) {
prec = PRINTF_DEFAULT_FLOAT_PRECISION;
}
// determine the decimal exponent
// based on the algorithm by David Gay (https://www.ampl.com/netlib/fp/dtoa.c)
union {
uint64_t U;
double F;
} conv {};
conv.F = value;
int exp2 = static_cast<int>((conv.U >> 52U) & 0x07FFU) - 1023; // effectively log2
conv.U = (conv.U & ((1ULL << 52U) - 1U)) |
(1023ULL << 52U); // drop the exponent so conv.F is now in [1,2)
// now approximate log10 from the log2 integer part and an expansion of ln around 1.5
int expval = static_cast<int>(0.1760912590558 + exp2 * 0.301029995663981 +
(conv.F - 1.5) * 0.289529654602168);
// now we want to compute 10^expval but we want to be sure it won't overflow
// exp2 = static_cast<int>(expval * 3.321928094887362 + 0.5);
exp2 = static_cast<int>(lround(expval * 3.321928094887362));
const double z = expval * 2.302585092994046 - exp2 * 0.6931471805599453;
const double z2 = z * z;
conv.U = static_cast<uint64_t>(exp2 + 1023) << 52U;
// compute exp(z) using continued fractions, see
// https://en.wikipedia.org/wiki/Exponential_function#Continued_fractions_for_ex
conv.F *= 1 + 2 * z / (2 - z + (z2 / (6 + (z2 / (10 + z2 / 14)))));
// correct for rounding errors
if (value < conv.F) {
expval--;
conv.F /= 10;
}
// the exponent format is "%+03d" and largest value is "307", so set aside 4-5 characters
unsigned int minwidth = ((expval < 100) && (expval > -100)) ? 4U : 5U;
// in "%g" mode, "prec" is the number of *significant figures* not decimals
if ((flags & FLAGS_ADAPT_EXP) != 0u) {
// do we want to fall-back to "%f" mode?
if ((value >= 1e-4) && (value < 1e6)) {
if (static_cast<int>(prec) > expval) {
prec = static_cast<unsigned>(static_cast<int>(prec) - expval - 1);
} else {
prec = 0;
}
flags |= FLAGS_PRECISION; // make sure _ftoa respects precision
// no characters in exponent
minwidth = 0U;
expval = 0;
} else {
// we use one sigfig for the whole part
if ((prec > 0) && ((flags & FLAGS_PRECISION) != 0u)) {
--prec;
}
}
}
// will everything fit?
unsigned int fwidth = width;
if (width > minwidth) {
// we didn't fall-back so subtract the characters required for the exponent
fwidth -= minwidth;
} else {
// not enough characters, so go back to default sizing
fwidth = 0U;
}
if (((flags & FLAGS_LEFT) != 0u) && (minwidth != 0u)) {
// if we're padding on the right, DON'T pad the floating part
fwidth = 0U;
}
// rescale the float value
if (expval != 0) {
value /= conv.F;
}
// output the floating part
const size_t start_idx = idx;
idx = _ftoa(out, buffer, idx, maxlen, negative ? -value : value, prec, fwidth,
flags & ~FLAGS_ADAPT_EXP);
// output the exponent part
if (minwidth != 0u) {
// output the exponential symbol
out((flags & FLAGS_UPPERCASE) != 0u ? 'E' : 'e', buffer, idx++, maxlen);
// output the exponent value
idx = _ntoa_long(out, buffer, idx, maxlen, (expval < 0) ? -expval : expval, expval < 0, 10,
0, minwidth - 1, FLAGS_ZEROPAD | FLAGS_PLUS);
// might need to right-pad spaces
if ((flags & FLAGS_LEFT) != 0u) {
while (idx - start_idx < width) {
out(' ', buffer, idx++, maxlen);
}
}
}
return idx;
}
template <typename Char>
static size_t _strnlen_s(const Char* str, size_t maxsize) {
size_t size = 0;
while (size < maxsize && str[size] != 0) {
++size;
}
return size;
}
// NOLINTNEXTLINE(readability-function-cognitive-complexity)
static int kyty_printf_internal(bool sn, char* sn_s, size_t sn_n, const char* format,
VaList* va_list) {
std::vector<char> buffer;
uint32_t flags = 0;
uint32_t width = 0;
uint32_t precision = 0;
uint32_t n = 0;
size_t idx = 0U;
auto maxlen = static_cast<size_t>(-1);
// use null output function
auto out = _out_null;
while (*format != 0) {
// format specifier? %[flags][width][.precision][length]
if (*format != '%') {
// no
out(*format, &buffer, idx++, maxlen);
format++;
continue;
}
// yes, evaluate it
format++;
// evaluate flags
flags = 0U;
do {
switch (*format) {
case '0':
flags |= FLAGS_ZEROPAD;
format++;
n = 1U;
break;
case '-':
flags |= FLAGS_LEFT;
format++;
n = 1U;
break;
case '+':
flags |= FLAGS_PLUS;
format++;
n = 1U;
break;
case ' ':
flags |= FLAGS_SPACE;
format++;
n = 1U;
break;
case '#':
flags |= FLAGS_HASH;
format++;
n = 1U;
break;
default: n = 0U; break;
}
} while (n != 0u);
// evaluate width field
width = 0U;
if (_is_digit(*format)) {
width = _atoi(&format);
} else if (*format == '*') {
// const int w = va_arg(va, int);
const int w = VaArg_int(va_list);
if (w < 0) {
flags |= FLAGS_LEFT; // reverse padding
width = static_cast<unsigned int>(-w);
} else {
width = static_cast<unsigned int>(w);
}
format++;
}
// evaluate precision field
precision = 0U;
if (*format == '.') {
flags |= FLAGS_PRECISION;
format++;
if (_is_digit(*format)) {
precision = _atoi(&format);
} else if (*format == '*') {
// const int prec = (int)va_arg(va, int);
const int prec = VaArg_int(va_list);
if (prec < 0) {
// A negative dynamic precision is treated as omitted.
flags &= ~FLAGS_PRECISION;
} else {
precision = static_cast<unsigned int>(prec);
}
format++;
}
}
// evaluate length field
switch (*format) {
case 'l':
flags |= FLAGS_LONG;
format++;
if (*format == 'l') {
flags |= FLAGS_LONG_LONG;
format++;
}
break;
case 'h':
flags |= FLAGS_SHORT;
format++;
if (*format == 'h') {
flags |= FLAGS_CHAR;
format++;
}
break;
case 't':
flags |= (sizeof(ptrdiff_t) == sizeof(int32_t) ? FLAGS_LONG : FLAGS_LONG_LONG);
format++;
break;
case 'j':
flags |= (sizeof(intmax_t) == sizeof(int32_t) ? FLAGS_LONG : FLAGS_LONG_LONG);
format++;
break;
case 'z':
flags |= (sizeof(size_t) == sizeof(int32_t) ? FLAGS_LONG : FLAGS_LONG_LONG);
format++;
break;
default: break;
}
// evaluate specifier
switch (*format) {
case 'd':
case 'i':
case 'u':
case 'x':
case 'X':
case 'o':
case 'b': {
// set the base
unsigned int base = 0;
if (*format == 'x' || *format == 'X') {
base = 16U;
} else if (*format == 'o') {
base = 8U;
} else if (*format == 'b') {
base = 2U;
} else {
base = 10U;
flags &= ~FLAGS_HASH; // no hash for dec format
}
// uppercase
if (*format == 'X') {
flags |= FLAGS_UPPERCASE;
}
// no plus or space flag for u, x, X, o, b
if ((*format != 'i') && (*format != 'd')) {
flags &= ~(FLAGS_PLUS | FLAGS_SPACE);
}
// ignore '0' flag when precision is given
if ((flags & FLAGS_PRECISION) != 0u) {
flags &= ~FLAGS_ZEROPAD;
}
// convert the integer
if ((*format == 'i') || (*format == 'd')) {
// signed
if ((flags & FLAGS_LONG_LONG) != 0u || (flags & FLAGS_LONG) != 0u) {
// const long long value = va_arg(va, long long);
auto value = VaArg_long_long(va_list);
idx = _ntoa_long_long(out, &buffer, idx, maxlen,
static_cast<uint64_t>(value > 0 ? value : 0 - value),
value < 0, base, precision, width, flags);
} else if ((flags & FLAGS_LONG) != 0u) {
// const long value = va_arg(va, long);
auto value = VaArg_long(va_list);
idx = _ntoa_long(out, &buffer, idx, maxlen,
static_cast<uint32_t>(value > 0 ? value : 0 - value),
value < 0, base, precision, width, flags);
} else {
// const int value = (flags & FLAGS_CHAR) ? (char)va_arg(va, int)
// : (flags & FLAGS_SHORT) ? (short int)va_arg(va, int)
// : va_arg(va, int);
int value =
(flags & FLAGS_CHAR) != 0u ? static_cast<char>(VaArg_int(va_list))
: (flags & FLAGS_SHORT) != 0u ? static_cast<int16_t>(VaArg_int(va_list))
: VaArg_int(va_list);
idx = _ntoa_long(out, &buffer, idx, maxlen,
static_cast<unsigned int>(value > 0 ? value : 0 - value),
value < 0, base, precision, width, flags);
}
} else {
// unsigned
if ((flags & FLAGS_LONG_LONG) != 0u || (flags & FLAGS_LONG) != 0u) {
idx = _ntoa_long_long(out, &buffer, idx, maxlen,
static_cast<uint64_t>(VaArg_long_long(va_list)),
false, base, precision, width, flags);
} else if ((flags & FLAGS_LONG) != 0u) {
idx = _ntoa_long(out, &buffer, idx, maxlen,
static_cast<uint32_t>(VaArg_long(va_list)), false, base,
precision, width, flags);
} else {
const unsigned int value =
(flags & FLAGS_CHAR) != 0u
? static_cast<unsigned char>(VaArg_int(va_list))
: (flags & FLAGS_SHORT) != 0u
? static_cast<uint16_t>(VaArg_int(va_list))
: static_cast<unsigned int>(VaArg_int(va_list));
idx = _ntoa_long(out, &buffer, idx, maxlen, value, false, base, precision,
width, flags);
}
}
format++;
break;
}
case 'f':
case 'F':
if (*format == 'F') {
flags |= FLAGS_UPPERCASE;
}
idx = _ftoa(out, &buffer, idx, maxlen, VaArg_double(va_list), precision, width,
flags);
format++;
break;
case 'e':
case 'E':
case 'g':
case 'G':
if ((*format == 'g') || (*format == 'G')) {
flags |= FLAGS_ADAPT_EXP;
}
if ((*format == 'E') || (*format == 'G')) {
flags |= FLAGS_UPPERCASE;
}
idx = _etoa(out, &buffer, idx, maxlen, VaArg_double(va_list), precision, width,
flags);
format++;
break;
case 'c': {
unsigned int l = 1U;
// pre padding
if ((flags & FLAGS_LEFT) == 0u) {
while (l++ < width) {
out(' ', &buffer, idx++, maxlen);
}
}
// char output
out(static_cast<char>(VaArg_int(va_list)), &buffer, idx++, maxlen);
// post padding
if ((flags & FLAGS_LEFT) != 0u) {
while (l++ < width) {
out(' ', &buffer, idx++, maxlen);
}
}
format++;
break;
}
case 's': {
const size_t limit = (flags & FLAGS_PRECISION) != 0u ? precision : maxlen;
const char* p = VaArg_ptr<const char>(va_list);
std::string converted;
if ((flags & FLAGS_LONG) != 0u) {
// The guest ABI uses a 16-bit code unit for wchar_t.
const auto* wide = reinterpret_cast<const char16_t*>(p);
std::u16string_view text(wide, _strnlen_s(wide, limit));
if (text.size() == limit && !text.empty() &&
text.back() >= 0xd800 && text.back() <= 0xdbff) {
text.remove_suffix(1);
}
converted = Common::Utf16ToUtf8(text);
p = converted.c_str();
}
size_t length = _strnlen_s(p, limit);
if ((flags & FLAGS_LONG) != 0u && length < converted.size()) {
// A wide-string precision cannot split a multibyte character.
while (length != 0 && (static_cast<uint8_t>(p[length]) & 0xc0) == 0x80) {
--length;
}
}
if ((flags & FLAGS_LEFT) == 0u) {
for (size_t i = length; i < width; ++i) {
out(' ', &buffer, idx++, maxlen);
}
}
for (size_t i = 0; i < length; ++i) {
out(p[i], &buffer, idx++, maxlen);
}
if ((flags & FLAGS_LEFT) != 0u) {
for (size_t i = length; i < width; ++i) {
out(' ', &buffer, idx++, maxlen);
}
}
format++;
break;
}
case 'p': {
width = sizeof(void*) * 2U;
flags |= FLAGS_ZEROPAD | FLAGS_UPPERCASE;
const bool is_ll = sizeof(uintptr_t) == sizeof(int64_t);
if (is_ll) {
idx = _ntoa_long_long(out, &buffer, idx, maxlen,
reinterpret_cast<uintptr_t>(VaArg_ptr<void>(va_list)),
false, 16U, precision, width, flags);
} else {
idx = _ntoa_long(out, &buffer, idx, maxlen,
static_cast<uint32_t>(
reinterpret_cast<uintptr_t>(VaArg_ptr<void>(va_list))),
false, 16U, precision, width, flags);
}
format++;
break;
}
case '%':
out('%', &buffer, idx++, maxlen);
format++;
break;
default:
out(*format, &buffer, idx++, maxlen);
format++;
break;
}
}
// termination
out(static_cast<char>(0), &buffer, idx < maxlen ? idx : maxlen - 1U, maxlen);
if (sn) {
int s = snprintf(sn_s, sn_n, "%s", buffer.data());
EXIT_NOT_IMPLEMENTED(static_cast<size_t>(s) >= sn_n);
} else {
LOGF_COLOR(Log::Color::BrightMagenta, "%s", buffer.data());
}
// return written chars without terminating \0
return static_cast<int>(idx);
}
static int kyty_vprintf(const char* format, VaList* va_list) {
return kyty_printf_internal(false, nullptr, 0, format, va_list);
}
static int kyty_printf_ctx(VaContext* ctx) {
const char* format = VaArg_ptr<const char>(&ctx->va_list);
return kyty_printf_internal(false, nullptr, 0, format, &ctx->va_list);
}
static int kyty_snprintf_ctx(VaContext* ctx) {
char* s = VaArg_ptr<char>(&ctx->va_list);
size_t n = VaArg_size_t(&ctx->va_list);
const char* format = VaArg_ptr<const char>(&ctx->va_list);
return kyty_printf_internal(true, s, n, format, &ctx->va_list);
}
static int KYTY_SYSV_ABI kyty_printf_std(VA_ARGS) {
VA_CONTEXT(ctx); // NOLINT(cppcoreguidelines-pro-type-member-init,hicpp-member-init)
return kyty_printf_ctx(&ctx);
}
guest_printf_std_func_t GetGuestPrintfStdFunc() {
return reinterpret_cast<guest_printf_std_func_t>(kyty_printf_std);
}
guest_printf_ctx_func_t GetGuestPrintfCtxFunc() {
return kyty_printf_ctx;
}
guest_snprintf_ctx_func_t GetGuestSnprintfCtxFunc() {
return kyty_snprintf_ctx;
}
guest_vprintf_func_t GetGuestVprintfFunc() {
return kyty_vprintf;
}
} // namespace Libs
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