Gabriele Cosmo
45 lines
933 B
Plaintext
45 lines
933 B
Plaintext
#ifndef tools_realloc
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#define tools_realloc
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#include <cstring> //memcpy
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namespace tools {
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template <class T>
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inline bool realloc(T*& a_pointer,size_t a_new_size,size_t a_old_size,bool a_init = false) {
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if(!a_new_size) {
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delete [] a_pointer;
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a_pointer = 0;
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return true;
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}
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if(!a_pointer) {
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a_pointer = new T[a_new_size];
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if(!a_pointer) return false;
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return true;
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}
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if(a_old_size==a_new_size) return true;
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T* pointer = new T[a_new_size];
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if(!pointer) {
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delete [] a_pointer;
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a_pointer = 0;
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return false;
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}
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if(a_new_size>a_old_size) {
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::memcpy(pointer,a_pointer,a_old_size*sizeof(T));
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if(a_init){
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size_t num = a_new_size-a_old_size;
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T* pos = pointer+a_old_size;
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for(size_t i=0;i<num;i++,pos++) *pos = T();
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}
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} else {
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::memcpy(pointer,a_pointer,a_new_size*sizeof(T));
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}
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delete [] a_pointer;
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a_pointer = pointer;
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return true;
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}
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}
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#endif
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