77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
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#ifndef _LISTMACRO_H_
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#define _LISTMACRO_H_
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#include <assert.h>
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// assumes efficient realloc()
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#define declarePList(List, T) \
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typedef T *T##_pointer; \
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declareList(List, T##_pointer);
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#define implementPList(List, T) \
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typedef T *T##_pointer; \
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implementList(List, T##_pointer);
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#define declareList(List, T) \
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class List { \
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public: \
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List(); \
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~List(); \
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\
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long count() const { return m_count; } \
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T &item(long index) const { \
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assert(index >= 0 && index < m_count); \
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return m_items[index]; \
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} \
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T *array(long index, long count) { \
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return m_items + index; \
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} \
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\
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void append(const T &); \
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void remove(long index); \
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void remove_all(); \
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void move_to_start(long index); \
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\
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private: \
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T *m_items; \
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long m_count; \
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};
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#define implementList(List, T) \
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\
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List::List() : m_count(0), m_items(0) { } \
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\
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List::~List() { remove_all(); } \
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\
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void List::append(const T &item) { \
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if (m_items) { \
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m_items = (T *)realloc(m_items, (m_count + 1) * sizeof(T)); \
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} else { \
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m_items = (T *)malloc(sizeof(T)); \
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} \
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assert(m_items); \
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m_items[m_count++] = (T)item; \
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} \
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\
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void List::remove(long index) { \
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assert(index >= 0 && index < m_count); \
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memcpy(m_items+index, m_items+index+1, (m_count-index-1) * sizeof(T)); \
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m_items = (T *)realloc(m_items, (m_count - 1) * sizeof(T)); \
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--m_count; \
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} \
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\
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void List::remove_all() { \
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while (m_count > 0) remove(0); \
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} \
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\
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void List::move_to_start(long index) { \
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assert(index >= 0 && index < m_count); \
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T temp = item(index); \
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if (index > 0) memcpy(m_items+1, m_items, index * sizeof(T)); \
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m_items[0] = temp; \
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}
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#endif
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