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20 lines
528 B
C
20 lines
528 B
C
#include "byte.h"
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/* byte_copyr copies in[len-1] to out[len-1], in[len-2] to out[len-2],
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* ... and in[0] to out[0] */
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void byte_copyr(void* out, size_t len, const void* in) {
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register char* s=(char*)out+len;
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register const char* t=in;
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register const char* u=t+len;
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for (;;) {
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if (t>=u) break;
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--u; --s; *s=*u;
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if (t>=u) break;
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--u; --s; *s=*u;
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if (t>=u) break;
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--u; --s; *s=*u;
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if (t>=u) break;
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--u; --s; *s=*u;
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}
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}
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