forked from Bananymous/banan-os
LibC: fix bugs with printf
This commit is contained in:
Bananymous
parent
632b699475
commit
d82c6c2337
|
|
@ -26,17 +26,14 @@ struct format_options_t
|
|||
};
|
||||
|
||||
template<BAN::integral T>
|
||||
static void integer_to_string(char* buffer, T value, int base, bool upper, const format_options_t options)
|
||||
static void integer_to_string(char* buffer, T value, int base, bool upper, format_options_t options)
|
||||
{
|
||||
int width = 1;
|
||||
bool zero_padded = options.zero_padded;
|
||||
int digits = 1;
|
||||
if (options.percision != -1)
|
||||
{
|
||||
width = options.percision;
|
||||
zero_padded = false;
|
||||
digits = options.percision;
|
||||
options.zero_padded = false;
|
||||
}
|
||||
else if (options.width != -1)
|
||||
width = options.width;
|
||||
|
||||
auto digit_char = [](int digit, bool upper)
|
||||
{
|
||||
|
|
@ -45,51 +42,57 @@ static void integer_to_string(char* buffer, T value, int base, bool upper, const
|
|||
return (upper ? 'A' : 'a') + (digit - 10);
|
||||
};
|
||||
|
||||
bool sign = false;
|
||||
int offset = 0;
|
||||
if (value < 0)
|
||||
|
||||
int prefix_length = 0;
|
||||
char prefix[2] {};
|
||||
if constexpr(BAN::is_signed_v<T>)
|
||||
{
|
||||
sign = true;
|
||||
buffer[offset++] = digit_char(-(value % base), upper);
|
||||
value = -(value / base);
|
||||
prefix_length = 1;
|
||||
if (value < 0)
|
||||
{
|
||||
prefix[0] = '-';
|
||||
buffer[offset++] = digit_char(-(value % base), upper);
|
||||
value = -(value / base);
|
||||
}
|
||||
else if (options.show_plus_sign)
|
||||
prefix[0] = '+';
|
||||
else if (options.show_plus_sign_as_space)
|
||||
prefix[0] = ' ';
|
||||
else
|
||||
prefix_length = 0;
|
||||
}
|
||||
|
||||
if (value == 0 && width > 0)
|
||||
buffer[offset++] = '0';
|
||||
|
||||
while (value)
|
||||
else
|
||||
{
|
||||
if (options.alternate_form && base == 8)
|
||||
{
|
||||
prefix_length = 1;
|
||||
prefix[0] = '0';
|
||||
}
|
||||
else if (options.alternate_form && base == 16)
|
||||
{
|
||||
prefix_length = 2;
|
||||
prefix[0] = '0';
|
||||
prefix[1] = 'x';
|
||||
}
|
||||
}
|
||||
|
||||
while (value || offset < digits)
|
||||
{
|
||||
buffer[offset++] = digit_char(value % base, upper);
|
||||
value /= base;
|
||||
}
|
||||
|
||||
int prefix_length = 0;
|
||||
|
||||
if (sign || options.show_plus_sign || options.show_plus_sign_as_space)
|
||||
prefix_length++;
|
||||
if (base == 8 && options.alternate_form)
|
||||
prefix_length++;
|
||||
if (base == 16 && options.alternate_form)
|
||||
prefix_length += 2;
|
||||
|
||||
while (offset < width - prefix_length)
|
||||
buffer[offset++] = (zero_padded ? '0' : ' ');
|
||||
|
||||
if (sign)
|
||||
buffer[offset++] = '-';
|
||||
else if (options.show_plus_sign)
|
||||
buffer[offset++] = '+';
|
||||
else if (options.show_plus_sign_as_space)
|
||||
buffer[offset++] = ' ';
|
||||
|
||||
if (base == 8 && options.alternate_form)
|
||||
buffer[offset++] = '0';
|
||||
if (base == 16 && options.alternate_form)
|
||||
if (options.zero_padded)
|
||||
{
|
||||
buffer[offset++] = 'x';
|
||||
buffer[offset++] = '0';
|
||||
int zeroes = options.width - prefix_length;
|
||||
for (int i = offset; i < zeroes; i++)
|
||||
buffer[offset++] = '0';
|
||||
}
|
||||
|
||||
if (prefix[1]) buffer[offset++] = prefix[1];
|
||||
if (prefix[0]) buffer[offset++] = prefix[0];
|
||||
|
||||
for (int i = 0; i < offset / 2; i++)
|
||||
{
|
||||
char temp = buffer[i];
|
||||
|
|
@ -273,6 +276,13 @@ extern "C" int printf_impl(const char* format, va_list arguments, int (*putc_fun
|
|||
format++;
|
||||
}
|
||||
}
|
||||
else if (*format == '-')
|
||||
{
|
||||
percision = -1;
|
||||
format++;
|
||||
while (isdigit(*format))
|
||||
format++;
|
||||
}
|
||||
else if (*format == '*')
|
||||
{
|
||||
percision = va_arg(arguments, int);
|
||||
|
|
|
|||
|
|
@ -476,7 +476,6 @@ int vprintf(const char* format, va_list arguments)
|
|||
// TODO
|
||||
int vscanf(const char*, va_list);
|
||||
|
||||
// TODO
|
||||
int vsnprintf(char* buffer, size_t max_size, const char* format, va_list arguments)
|
||||
{
|
||||
if (buffer == nullptr)
|
||||
|
|
@ -489,34 +488,44 @@ int vsnprintf(char* buffer, size_t max_size, const char* format, va_list argumen
|
|||
};
|
||||
print_info info { buffer, max_size };
|
||||
|
||||
return printf_impl(format, arguments,
|
||||
int ret = printf_impl(format, arguments,
|
||||
[](int c, void* _info)
|
||||
{
|
||||
print_info* info = (print_info*)_info;
|
||||
if (info->remaining)
|
||||
if (info->remaining == 1)
|
||||
{
|
||||
*info->buffer = (info->remaining == 1 ? '\0' : c);
|
||||
*info->buffer = '\0';
|
||||
info->remaining = 0;
|
||||
}
|
||||
else if (info->remaining)
|
||||
{
|
||||
*info->buffer = c;
|
||||
info->buffer++;
|
||||
info->remaining--;
|
||||
}
|
||||
return 0;
|
||||
}, &info
|
||||
);
|
||||
|
||||
*info.buffer = '\0';
|
||||
return ret;
|
||||
}
|
||||
|
||||
// TODO
|
||||
int vsprintf(char* buffer, const char* format, va_list arguments)
|
||||
{
|
||||
if (buffer == nullptr)
|
||||
return printf_impl(format, arguments, [](int, void*) { return 0; }, nullptr);
|
||||
|
||||
return printf_impl(format, arguments,
|
||||
int ret = printf_impl(format, arguments,
|
||||
[](int c, void* _buffer)
|
||||
{
|
||||
*(*(char**)_buffer)++ = c;
|
||||
return 0;
|
||||
}, &buffer
|
||||
);
|
||||
|
||||
*buffer = '\0';
|
||||
return ret;
|
||||
}
|
||||
|
||||
// TODO
|
||||
|
|
|
|||
Loading…
Reference in New Issue