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#pragma once
#define FD_SETSIZE 64
#define FD_ZERO(set) memset((set), 0, sizeof(fd_set));
#define FD_CLR(fd, set) ((set)->bits[(fd / 8)] &= ~(1 << (fd) % 8))
#define FD_SET(fd, set) ((set)->bits[(fd / 8)] |= (1 << (fd) % 8))
#define FD_ISSET(fd, set) ((set)->bits[(fd / 8)] & (1 << (fd) % 8))
struct __fd_set {
unsigned char bits[FD_SETSIZE / 8];
};
typedef struct __fd_set fd_set;
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