mirror of
https://github.com/isledecomp/isle-portable.git
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97b3dcaa2c
* Beta addrs * Streamer changes * Typo and comment. One more beta addr * Rename member to m_controllers
167 lines
3.2 KiB
C++
167 lines
3.2 KiB
C++
#ifndef MXBITSET_H
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#define MXBITSET_H
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#pragma warning(disable : 4237)
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#include "mxtypes.h"
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#include <assert.h>
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#include <limits.h> // CHAR_BIT
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template <size_t N>
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class MxBitset {
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public:
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MxBitset() { Tidy(); }
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// SIZE 0x08
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class Reference {
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friend class MxBitset<N>;
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public:
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Reference& Flip()
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{
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m_bitset->Flip(m_offset);
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return (*this);
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}
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bool operator~() const { return (!m_bitset->Test(m_offset)); }
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operator bool() const { return (m_bitset->Test(m_offset)); }
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private:
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Reference(MxBitset<N>& p_bitset, size_t p_offset) : m_bitset(&p_bitset), m_offset(p_offset) {}
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MxBitset<N>* m_bitset; // 0x00
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size_t m_offset; // 0x04
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};
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Reference operator[](size_t p_bit) { return (Reference(*this, p_bit)); }
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MxBitset<N>& Flip(size_t p_bit)
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{
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if (N <= p_bit) {
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Xran();
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}
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m_blocks[p_bit / e_bitsPerBlock] ^= 1 << p_bit % e_bitsPerBlock;
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return (*this);
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}
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size_t Count()
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{
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// debug only, intentionally unimplemented
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return 0;
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}
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bool Test(MxU32 p_bit)
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{
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if (p_bit >= N) {
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Xran();
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}
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return (m_blocks[p_bit / e_bitsPerBlock] & (1 << p_bit % e_bitsPerBlock)) != 0;
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}
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MxU32 Size() const { return N; }
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private:
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void Tidy(MxU32 p_value = 0)
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{
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for (MxS32 i = e_blocksRequired; i >= 0; --i) {
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m_blocks[i] = p_value;
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}
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// No need to trim if all bits were zeroed out
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if (p_value != 0) {
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Trim();
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}
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}
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// Apply bit mask to most significant block
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void Trim()
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{
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if (N % e_bitsPerBlock != 0) {
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m_blocks[e_blocksRequired] &= ((1 << (N % e_bitsPerBlock)) - 1);
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}
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}
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void Xran() { assert("invalid MxBitset<N> position" == NULL); }
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// Not a real enum. This is how STL BITSET defines these constants.
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enum {
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e_bitsPerBlock = CHAR_BIT * sizeof(MxU32),
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e_blocksRequired = N == 0 ? 0 : (N - 1) / e_bitsPerBlock
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};
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MxU32 m_blocks[e_blocksRequired + 1]; // 0x00
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};
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// TEMPLATE: BETA10 0x10146600
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// MxBitset<2>::MxBitset<2>
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// TEMPLATE: BETA10 0x101464e0
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// MxBitset<22>::MxBitset<22>
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// TEMPLATE: BETA10 0x10146510
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// MxBitset<22>::Tidy
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// TEMPLATE: BETA10 0x10146570
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// MxBitset<22>::Trim
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// TEMPLATE: BETA10 0x10146630
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// MxBitset<2>::Tidy
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// TEMPLATE: BETA10 0x10146690
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// MxBitset<2>::Trim
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// TEMPLATE: BETA10 0x10146880
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// MxBitset<22>::Size
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// TEMPLATE: BETA10 0x101469d0
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// MxBitset<2>::Size
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// TEMPLATE: BETA10 0x101587a0
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// MxBitset<22>::Reference::Flip
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// TEMPLATE: BETA10 0x101587d0
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// MxBitset<22>::Reference::operator int
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// TEMPLATE: BETA10 0x10158800
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// MxBitset<22>::operator[]
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// TEMPLATE: BETA10 0x10158830
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// MxBitset<22>::Reference::Reference
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// TEMPLATE: BETA10 0x10158860
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// MxBitset<22>::Flip
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// STUB: BETA10 0x101588b0
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// MxBitset<22>::Count
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// TEMPLATE: BETA10 0x10158930
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// MxBitset<22>::Test
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// TEMPLATE: BETA10 0x10158990
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// MxBitset<22>::Xran
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// TEMPLATE: BETA10 0x10158b70
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// MxBitset<2>::Reference::Flip
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// TEMPLATE: BETA10 0x10158ba0
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// MxBitset<2>::Reference::operator int
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// TEMPLATE: BETA10 0x10158bd0
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// MxBitset<2>::operator[]
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// TEMPLATE: BETA10 0x10158c00
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// MxBitset<2>::Reference::Reference
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// TEMPLATE: BETA10 0x10158c30
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// MxBitset<2>::Flip
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// STUB: BETA10 0x10158c80
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// MxBitset<2>::Count
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// TEMPLATE: BETA10 0x10158d00
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// MxBitset<2>::Test
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// TEMPLATE: BETA10 0x10158d60
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// MxBitset<2>::Xran
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#endif // MXBITSET_H
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