mirror of https://github.com/jorio/Pomme.git
96 lines
1.5 KiB
C++
96 lines
1.5 KiB
C++
#pragma once
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#include <algorithm>
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#include <istream>
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#include <vector>
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namespace Pomme
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{
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class StreamPosGuard
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{
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std::istream& stream;
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const std::streampos backup;
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bool active;
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public:
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StreamPosGuard(std::istream& f);
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~StreamPosGuard();
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void Cancel();
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};
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class BigEndianIStream
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{
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public:
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BigEndianIStream(std::istream& theStream);
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void Read(char* dst, size_t n);
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void Skip(size_t n);
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void Goto(std::streamoff absoluteOffset);
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std::streampos Tell() const;
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StreamPosGuard GuardPos();
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std::vector<unsigned char> ReadBytes(size_t n);
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std::string ReadPascalString(int padToAlignment = 1);
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std::string ReadPascalString_FixedLengthRecord(const int maxChars);
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double Read80BitFloat();
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template<typename T>
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T Read()
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{
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char b[sizeof(T)];
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Read(b, sizeof(T));
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#if !(__BIG_ENDIAN__)
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if constexpr (sizeof(T) > 1)
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{
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std::reverse(b, b + sizeof(T));
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}
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#endif
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return *(T*) b;
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}
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private:
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std::istream& stream;
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};
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class BigEndianOStream
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{
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public:
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BigEndianOStream(std::ostream& theStream);
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void Write(const char* src, size_t n);
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void Goto(std::streamoff absoluteOffset);
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std::streampos Tell() const;
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void WritePascalString(const std::string& text, int padToAlignment = 1);
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void WriteRawString(const std::string& text);
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template<typename T>
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void Write(T value)
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{
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char* b = (char*) &value;
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#if !(__BIG_ENDIAN__)
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if constexpr (sizeof(T) > 1)
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{
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std::reverse(b, b + sizeof(T));
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}
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#endif
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Write(b, sizeof(T));
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}
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private:
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std::ostream& stream;
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};
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}
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