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42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
#include "format.hpp"
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#include <cstring>
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#include <istream>
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#include <stdexcept>
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namespace ESM
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{
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namespace
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{
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bool isValidFormat(std::uint32_t value)
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{
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return value == static_cast<std::uint32_t>(Format::Tes3)
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|| value == static_cast<std::uint32_t>(Format::Tes4);
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}
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Format toFormat(std::uint32_t value)
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{
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if (!isValidFormat(value))
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throw std::runtime_error("Invalid format: " + std::to_string(value));
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return static_cast<Format>(value);
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}
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}
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Format readFormat(std::istream& stream)
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{
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std::uint32_t format = 0;
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stream.read(reinterpret_cast<char*>(&format), sizeof(format));
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if (stream.gcount() != sizeof(format))
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throw std::runtime_error("Not enough bytes to read file header");
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return toFormat(format);
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}
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Format parseFormat(std::string_view value)
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{
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if (value.size() != sizeof(std::uint32_t))
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throw std::logic_error("Invalid format value: " + std::string(value));
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std::uint32_t format;
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std::memcpy(&format, value.data(), sizeof(std::uint32_t));
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return toFormat(format);
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}
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}
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