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#include "messageformatparser.hpp"
#include <charconv>
namespace
{
int parseNumber(std::size_t& i, std::string_view m, int fallback)
{
if (i < m.size() && m[i] >= '0' && m[i] <= '9')
{
const char* start = m.data() + i;
int parsed;
auto [ptr, ec] = std::from_chars(start, m.data() + m.size(), parsed);
i += ptr - start;
if (ec == std::errc())
return parsed;
}
return fallback;
}
}
namespace Misc
{
MessageFormatParser::~MessageFormatParser() = default;
void MessageFormatParser::process(std::string_view m)
{
for (std::size_t i = 0; i < m.size(); ++i)
{
if (m[i] == '%')
{
if (++i < m.size())
{
if (m[i] == '%')
visitedCharacter('%');
else
{
char pad = ' ';
if (m[i] == '0' || m[i] == ' ')
{
pad = m[i];
++i;
}
int width = parseNumber(i, m, -1);
if (i < m.size())
{
int precision = -1;
if (m[i] == '.')
{
++i;
precision = parseNumber(i, m, 0);
}
if (i < m.size())
{
if (m[i] == 'S' || m[i] == 's')
visitedPlaceholder(StringPlaceholder, pad, width, precision, Notation::Fixed);
else if (m[i] == 'd' || m[i] == 'i')
visitedPlaceholder(IntegerPlaceholder, pad, width, precision, Notation::Fixed);
else if (m[i] == 'f' || m[i] == 'F')
visitedPlaceholder(FloatPlaceholder, pad, width, precision, Notation::Fixed);
else if (m[i] == 'e' || m[i] == 'E')
visitedPlaceholder(FloatPlaceholder, pad, width, precision, Notation::Scientific);
else if (m[i] == 'g' || m[i] == 'G')
visitedPlaceholder(FloatPlaceholder, pad, width, precision, Notation::Shortest);
else if (m[i] == 'a')
visitedPlaceholder(FloatPlaceholder, pad, width, precision, Notation::HexLower);
else if (m[i] == 'A')
visitedPlaceholder(FloatPlaceholder, pad, width, precision, Notation::HexUpper);
else
visitedCharacter(m[i]);
}
}
}
}
}
else
{
visitedCharacter(m[i]);
}
}
}
}
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