65 lines
1.1 KiB
C++
65 lines
1.1 KiB
C++
#pragma once
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include <exception>
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#include "endian.h"
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namespace util
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{
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class membuffer
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{
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public:
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membuffer(char * buffer, std::size_t size)
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{
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current = start = buffer;
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end = start + size;
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}
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~membuffer()
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{
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// maybe? possibly? left out to avoid confusion. for now.
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//delete start;
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}
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/**
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* Read some value. That's all ;)
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*/
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template <class T>
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void read(T& val)
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{
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val = *(T *)current;
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current += sizeof(T);
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}
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/**
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* Read a big-endian number
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* valid for 2-byte, 4-byte and 8-byte variables
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*/
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template <class T>
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void read_be(T& val)
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{
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val = util::bigswap(*(T *)current);
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current += sizeof(T);
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}
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/**
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* Read a string in the format:
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* 2B length (big endian, unsigned)
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* length bytes data
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*/
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void read_jstr(std::string & str)
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{
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uint16_t length = 0;
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read_be(length);
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str.append(current,length);
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current += length;
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}
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/**
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* Skip N bytes
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*/
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void skip (std::size_t N)
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{
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current += N;
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}
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private:
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char * start, *end, *current;
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};
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}
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