40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
#ifndef _FIFO_H
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#define _FIFO_H
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#include "Common.h"
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// inline for speed!
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class FifoReader
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{
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u8 *ptr;
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u8 *end;
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u8 *tempPtr; //single element stack :P
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u8 *tempEnd;
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bool pushed;
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public:
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void Init(u8 *_ptr, u8 *_end)
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{
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ptr = _ptr; end = _end; pushed = false;
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}
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bool IsPushed() {return pushed;}
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void Push(u8 *_ptr, u8 *_end) {pushed = true; tempPtr = ptr; tempEnd = end; ptr = _ptr; end = _end;}
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void Pop() {pushed = false; ptr = tempPtr; end = tempEnd;}
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u8 Peek8 (int offset) { return ptr[offset]; }
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u16 Peek16(int offset) { return _byteswap_ushort(*(u16*)(ptr+offset)); }
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u32 Peek32(int offset) { return _byteswap_ulong(*(u32*)(ptr+offset)); }
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u8 Read8 () {return *ptr++;}
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u16 Read16() {const u16 value = _byteswap_ushort(*((u16*)ptr)); ptr+=2; return value;}
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u32 Read32() {const u32 value = _byteswap_ulong(*((u32*)ptr)); ptr+=4; return value;}
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float Read32F() {const u32 value = _byteswap_ulong(*((u32*)ptr)); ptr+=4; return *(float*)&value;}
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size_t GetRemainSize() const { return (int)(end - ptr); }
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u8 *GetPtr() const { return ptr; }
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void MoveEndForward() { end += 32; }
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u8 *GetEnd() const { return end; }
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};
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extern FifoReader fifo;
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void Fifo_Init();
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void Fifo_Shutdown();
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#endif |