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/*
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* Copyright (C) 2022 Riyyi
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <algorithm> // min
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#include <cstddef> // size_t
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#include <iomanip> // setprecision
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#include <ios> // defaultfloat, fixed
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#include <limits> // numeric_limits
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#include <sstream> // stringstream
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#include <string>
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#include <string_view>
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#include "util/format/builder.h"
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#include "util/meta/assert.h"
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namespace Util::Format {
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void Builder::putLiteral(std::string_view literal)
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{
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for (size_t i = 0; i < literal.length(); ++i) {
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putCharacter(literal[i]);
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if (literal[i] == '{' || literal[i] == '}') {
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++i;
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}
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}
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}
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void Builder::putU64(size_t value, char fill, Align align, Sign sign, bool zeroPadding, size_t width, bool isNegative) const
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{
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std::string string = (std::stringstream {} << value).str();
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// Sign
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std::string signCharacter = "";
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switch (sign) {
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case Sign::None:
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case Sign::Negative:
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if (isNegative) {
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signCharacter = '-';
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}
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break;
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case Sign::Both:
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signCharacter = (isNegative) ? '-' : '+';
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break;
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case Sign::Space:
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signCharacter = (isNegative) ? '-' : ' ';
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break;
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default:
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VERIFY_NOT_REACHED();
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};
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if (align != Align::None || !zeroPadding) {
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string.insert(0, signCharacter);
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}
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// Zero padding
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if (zeroPadding) {
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fill = '0';
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}
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size_t length = string.length();
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if (width < length) {
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m_builder.write(string.data(), length);
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return;
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}
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switch (align) {
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case Align::Left:
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m_builder.write(string.data(), length);
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m_builder << std::string(width - length, fill);
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break;
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case Align::Center: {
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size_t half = (width - length) / 2;
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m_builder << std::string(half, fill);
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m_builder.write(string.data(), length);
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m_builder << std::string(width - half - length, fill);
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break;
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}
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case Align::Right:
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m_builder << std::string(width - length, fill);
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m_builder.write(string.data(), length);
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break;
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case Align::None:
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if (zeroPadding) {
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m_builder << signCharacter;
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if (signCharacter.empty()) {
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m_builder << '0';
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}
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}
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m_builder << std::string(width - length - zeroPadding, fill);
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m_builder.write(string.data(), length);
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break;
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default:
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VERIFY_NOT_REACHED();
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};
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}
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void Builder::putI64(int64_t value, char fill, Align align, Sign sign, bool zeroPadding, size_t width) const
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{
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bool isNegative = value < 0;
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value = isNegative ? -value : value;
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putU64(static_cast<uint64_t>(value), fill, align, sign, zeroPadding, width, isNegative);
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}
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void Builder::putF64(double number, uint8_t precision) const
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{
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precision = std::min(precision, static_cast<uint8_t>(std::numeric_limits<double>::digits10));
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std::stringstream stream;
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stream
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<< std::fixed << std::setprecision(precision)
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<< number
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<< std::defaultfloat << std::setprecision(6);
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std::string string = stream.str();
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m_builder << string;
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}
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void Builder::putString(std::string_view string, char fill, Align align, size_t width) const
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{
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size_t length = string.length();
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if (width < length) {
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m_builder.write(string.data(), length);
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return;
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}
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switch (align) {
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case Align::None:
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case Align::Left:
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m_builder.write(string.data(), length);
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m_builder << std::string(width - length, fill);
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break;
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case Align::Center: {
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size_t half = (width - length) / 2;
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m_builder << std::string(half, fill);
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m_builder.write(string.data(), length);
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m_builder << std::string(width - half - length, fill);
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break;
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}
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case Align::Right:
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m_builder << std::string(width - length, fill);
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m_builder.write(string.data(), length);
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break;
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default:
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VERIFY_NOT_REACHED();
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};
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}
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} // namespace Util::Format
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