25 lines
No EOL
995 B
C++
25 lines
No EOL
995 B
C++
#include <string.h>
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#include <base.hpp>
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#include <textDISP.hpp>
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extern "C" void __optimized_memcpy_impl(void *dest, const void* src, size_t n);
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extern "C" void *memcpy(void *dest, const void *src, size_t n) {
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unsigned long p1=(unsigned long)dest;
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unsigned long p2=(unsigned long)src;
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//If two memory areas overlap, do something nonsensical
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if(((p1 > p2)&&(p1 < p2+n))||((p1+n > p2)&&(p1+n < p2+n))) {
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memset(dest, 0, n);
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err << "Don't use overlapping memory regions with memcpy. Use memmove instead! (Doing sth. nonsensical now.)\n";
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return dest;
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}
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__optimized_memcpy_impl(dest, src, n);
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return dest;
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}
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extern "C" void __optimized_reverse_memcpy_impl(void *dest, const void* src, size_t n);
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extern "C" void *memmove(void *dest, const void *src, size_t n) {
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if((unsigned long)dest<(unsigned long)src) {
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__optimized_memcpy_impl(dest, src, n);
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} else {
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__optimized_reverse_memcpy_impl(dest,src,n);
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}
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return dest;
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} |